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2021 Annual Report South Tahoe Public Utility District - ar Tahoe South Fublic Utility District 1275 Meadow Crest Drive-South Lake Tahoe-CA 96150-7401 Phone 530 544-0474-Fax 530 541-0614-www,stpud.uo April 15, 2022 Michael Plaziak California Regional Water Quality Control Board - Lahontan Region 2501 Lake Tahoe Boulevard South Lake Tahoe, CA 96150 Subject: 2021 Annual Report Mr. Plaziak: Enclosed is the South Tahoe Public Utility District (STPUD) annual self-monitoring report for the 2021 calendar year. STPUD is reporting as required by the Wastewater Reclamation Permit (Board Order R6T-2004-0010A3, WDID No. 6A095900700). This report contains our compliance record, sewer connection information and sewer flows, as well as graphical and tabular presentation of the data collected during 2021. Trend analyses on sample sites from pre-discharge to 2021 are included. It also includes our updated pretreatment program. Please give me a call if you have any questions regarding this report. Respectfully yours, Dan Arce Laboratory Director cc: Lahontan RWQCB- RB6-Lahontan waterboards.ca. ov: Mike.Plaziak waterboards.ca. ov Lahontan RWQCB, Robert Tucker- RTucker waterboards.ca. ov Lahontan RWQCB, Trevor Miller— trevor.miller waterboards.ca. ov Lahontan RWQCB, Tiffany Racz— tiffan .racz waterboards.ca. ov Alpine County Board of Supervisors-ttremayneC@a1Pinecountyca._qo Alpine County Health Department, Dr. Richard Johnson - rjohnsonQ)alpinecountyca.gov Alpine County Health Department, Dennis Lampson dlam son al inecount ca. ov Alpine County STPUD Contract Commission— Dr. Richard Harvey rharvey1.23(ZDgmai1.com D:WnnualReportslahontan Cover Letter-2021 doc WATER RECLAMATION PLANT ALPINE COUNTY 2021 ANNUAL REPORT SpUTH raHoe pf/Sewe • 1950 • �se` G� UTILITY D\SZA` SOUTH TAHOE PUBLIC UTILITY DISTRICT 2021 ANNUAL PERFORMANCE DATA Table of Contents Wastewater Treatment Plant Pretreatment Program Heavenly Valley Creek Emergency Retention Basin, Treatment Plant & Buried Sludge monitoring Wells Harvey Place Reservoir Indian Creek Reservoir Alpine County Monitoring Soils Alpine County Monitoring Wells Diamond Valley Ranch Monitoring Wells Alpine County Potable Water Wells Alpine County Surface Waters Irrigation Ditches Trihalomethanes (THM) & MTBE Monitoring Test Method for Total Nitrogen & TKN WASTEWATER TREATMENT PLANT WASTEWATER TREATMENT The plant influent flow and loadings and the effluent quality are reported in this section. Tables and graphs are provided to show 2021 monthly results and yearly averages since 1980. There are multiple tables showing similar information. The averages computed in these tables may be different from that represented in the Trends and Graphs which contain chemical data. Tables compute the annual average from the monthly averages, while chemical data graphs and trends average from the entire data set. 2021 Annual Report 1. Compliance Record: No violations occurred during 2021 2. Wastewater Treatment Flow Information: Permits Item Flow # a. Annual peak-day dry-weather influent flow (mgd) 4.01 b Annual peak-day wet-weather influent flow and associated storm data (mgd) 4.39 c. Maximum month influent flow (mgd) 4.39 d. Annual average influent flow (mgd) 2.93 1. Sewer connection permits issued but not currently used, 17,446 17 (gpd) e. 2. Capacity currently issued/reserved for public agencies 222,000 20 (gpd) 3. Projects issued "will-serve" letters or similar commitment 0 0 f. Estimated influent flow from facilities described in 2e. 239,446 Estimated remaining available wastewater treatment capacity 45% g' considering the influent flow estimated in 2f. See note Estimated influent flow parameters listed in 2a through 2d for the coming year • Annual peak-day dry-weather influent flow (mgd) 4.42 h. Annual peak-day wet-weather influent flow and 6.45 associated storm data (mgd) • Maximum month influent flow (mgd) 4.15 • Annual average influent flow (mgd) 3.30 Notes: Estimated remaining available wastewater treatment capacity is computed by subtracting annual peak-day dry-weather influent flow(2a)plus total flow from permits issued but not used(2f)from wastewater treatment plant design capacity 7.7 mgd and dividing by 7.7 mgd. Annual peak-day dry-weather influent flow,Annual peak-day wet-weather influent flow,and Annual average influent flow for 2022 estimated from linear regression analysis using corresponding flows from the last ten years(2012 through 2021). D:WnnuaIReports\Section_C_Data 2021.doc WASTEWATER FLOWS 2021 Influent Effluent Month Total Max Min Ave Total Max Min Ave Jan 91.82 3.47 2.61 2.96 101.60 3.99 2.75 3.28 Feb 88.82 3.64 2.81 3.17 97.88 4.24 2.89 3.50 Mar 99.47 3.72 2.84 3.21 109.34 4.67 2.82 3.53 Arp 91.17 3.56 2.69 3.04 97.90 4.51 1.40 3.26 May 90.31 3.67 2.64 2.91 98.88 4.10 2.22 3.19 June 97.42 3.66 2.89 3.25 103.78 3.90 2.86 3.46 July 108.18 4.01 3.25 3.49 114.98 5.11 1.91 3.71 Aug 83.97 3.43 0.70 2.71 89.30 4.09 0.13 2.88 Sep 62.16 3.00 0.70 2.07 67.10 3.61 0.00 2.24 Oct 84.12 4.39 2.40 2.71 95.26 5.53 0.19 3.07 Nov 88.54 3.46 2.63 2.95 97.57 3.71 2.76 3.25 Dec 93.15 4.30 2.28 3.00 94.68 7.08 -0.01 3.05 Total 1,079.13 1,168.27 Maximum 108.18 4.39 3.49 114.98 7.08 3.71 Minimum 62.16 0.70 2.07 67.10 -0.01 2.24 Average 89.93 2.96 97.36 3.20 Note: Total flows in MG; Max, Min and Ave flows in MGD. Maximum Flow Report 2021 Wet Weather Maximum Influent Flow: 10/24/2021 4.39 MG Dry Weather Maximum Influent Flow: 07/04/2021 4.01 MG Influent Precipitation Date Day MG Inch Type Comments Wet Weather Maximum Wet Weather Flow 10/24/2021 Sun 4.39 4.89 Rain 12/23/2021 Thu 4.30 1.61 Snow 12/24/2021 Fri 3.89 0.31 Snow 12/31/2021 Fri 3.81 0.01 Snow 03/20/2021 Sat 3.72 12/22/2021 Wed 3.72 0.66 Rain 02/14/2021 Sun 3.64 0.01 Snow 12/25/2021 Sat 3.63 0.45 Snow 02/13/2021 Sat 3.62 0.17 Snow 12/30/2021 Thu 3.62 Dry Weather Maximum Dry Weather Flow 07/04/2021 Sun 4.01 07/03/2021 Sat 4.00 0.12 Rain 07/22/2021 Thu 3.88 07/05/2021 Mon 3.73 07/21/2021 Wed 3.72 05/30/2021 Sun 3.67 06/19/2021 Sat 3.66 07/10/2021 Sat 3.61 07/17/2021 Sat 3.60 06/26/2021 Sat 3.58 D:\AnnualReports\Max-Flow-Annual_Report-2021 PLANT LOADINGS for 2021 Change 2020 2021 % Influent Flow, MG 1,139.79 1,079.13 -5.32 COD (mg/1) COD (Ibs/yr) BOD (mg/1) 276 276 0.00 BOD (Ibs/yr) 2,623,614 2,483,985 -5.32 SS (mg/1) 213 211 -0.94 SS (Ibs/yr) 2,024,746 1,898,988 -6.21 NH3-N (mg/1) 31.2 32.7 4.81 NH3-N (Ibs/yr) 296,582 294,298 -0.77 Total P (mg/1) 5.90 5.69 -3.56 Total P (Ibs/yr) 56,085 51,210 -8.69 RAW INFLUENT CHARACTERISTICS for 2021 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Yearly COD Max: Min: Ave: BOD Max: 329 338 303 314 319 307 342 355 278 299 355 340 355 Min: 246 252 259 240 226 252 292 226 54 160 227 209 54 Ave: 286 289 284 272 287 293 316 284 205 257 271 281 277 SS Max: 246 259 240 301 256 296 290 296 213 272 248 250 301 Min: 171 179 162 158 178 207 212 176 48 138 156 140 48 Ave: 212 213 197 211 218 242 246 237 145 207 205 207 212 NH3-N Max: 36.2 35.0 32.8 33.1 39.9 42.9 44.2 39.1 31.8 35.2 32.0 36.2 44.2 Min: 31.1 29.3 29.8 29.6 26.7 35.0 37.9 31.6 8.2 25.7 28.4 28.2 8.2 Ave: 33.0 32.2 31.0 31.0 32.4 39.2 39.7 35.4 24.9 31.8 30.6 34.0 32.9 Total P Max: 5.72 5.52 5.64 5.72 6.02 6.90 6.82 6.22 5.41 5.64 5.50 5.88 6.90 Min: 5.45 5.48 5.56 5.30 5.26 5.56 6.52 4.95 5.30 5.48 5.38 5.42 4.95 Ave: 5.60 5.50 5.61 5.57 5.56 6.26 6.67 5.59 5.36 5.56 5.44 5.57 5.69 Note: Results expressed as mg/I RAW INFLUENT ANNUALTRENDS <---FLOW---> Total Daily COD BOD SS NH3-N NO3-N Total-P Cl TDS Year MG MGD mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 1980 1,585.3 4.30 368 170 139 22.6 0.056 8.30 29.9 246 1981 1,467.4 4.00 397 161 148 22.8 0.053 8.37 27.6 245 1982 1,685.1 4.60 369 157 129 20.4 0.092 7.17 28.0 230 1983 1,612.9 4.42 344 153 126 18.4 0.096 6.71 28.2 231 1984 1,493.0 4.08 406 161 135 21.0 0.076 7.45 29.0 231 1985 1,464.8 4.01 412 177 143 21.3 0.069 7.82 30.8 245 1986 1,573.4 4.32 353 148 117 19.1 0.101 6.73 29.4 237 1987 1,551.2 4.25 388 165 132 21.0 1.497 6.99 31.1 252 1988 1,501.4 4.10 407 197 134 23.2 0.040 7.34 35.5 257 1989 1,652.3 4.52 430 174 134 20.8 0.135 6.80 38.0 243 1990 1,573.6 4.31 534 212 185 21.9 0.072 7.13 34.7 268 1991 1,401.1 3.83 418 182 158 21.1 0.219 7.00 39.5 260 1992 1,438.3 3.93 428 193 162 21.2 0.165 6.93 37.3 265 1993 1,587.9 4.35 420 203 149 20.1 0.069 5.50 35.3 261 1994 1,464.6 4.01 434 205 172 19.9 0.065 5.76 39.2 265 1995 1,694.8 4.64 406 169 144 18.9 0.268 5.13 35.5 251 1996 1,787.4 4.88 381 169 139 17.4 0.202 4.65 34.5 233 1997 1,766.1 4.84 389 162 144 18.2 0.144 4.67 34.9 238 1998 1,719.1 4.71 404 175 157 18.0 0.226 4.67 36.1 236 1999 1,774.2 4.86 397 173 154 18.6 0.410 4.63 35.8 237 2000 1,774.3 4.85 400 171 152 19.2 0.447 4.95 39.4 249 2001 1,586.0 4.34 440 191 174 19.5 0.786 5.40 42.1 263 2002 1,659.5 4.55 406 176 151 18.4 0.451 4.84 40.6 256 2003 1,552.9 4.25 426 187 156 20.2 0.266 5.32 41.6 256 2004 1,563.5 4.27 478 207 196 21.9 0.210 5.28 37.8 261 2005 1,602.1 4.39 434 192 164 20.4 0.132 4.82 35.8 251 2006 1,682.2 4.61 405 183 156 20.4 0.043 4.97 35.6 233 2007 1,471.3 4.03 463 200 170 21.6 0.169 5.24 34.6 250 2008 1,454.3 3.97 489 206 165 23.4 0.072 5.47 38.6 253 2009 1,416.0 3.88 492 220 176 23.8 0.028 5.44 37.7 250 2010 1,424.2 3.90 478 211 178 22.2 0.130 5.19 39.7 248 2011 1,526.8 4.18 395 188 168 19.8 0.350 4.28 37.9 240 2012 1,333.3 3.64 200 166 23.6 0.061 4.62 38.3 246 2013 1,275.0 3.49 230 194 25.1 0.053 5.14 36.5 247 2014 1,191.3 3.26 244 211 25.9 0.031 5.47 38.4 254 2015 1,110.9 3.04 265 215 28.1 0.027 5.65 40.7 267 2016 1,279.3 3.49 227 193 26.3 0.061 5.36 40.9 252 2017 1,600.7 4.40 207 171 21.4 0.102 4.32 45.3 250 2018 1,294.4 3.52 247 199 27.9 0.036 4.97 44.6 256 2019 1,318.8 3.61 242 192 28.6 0.075 5.36 45.5 267 2020 1,139.8 3.11 276 213 31.2 0.054 5.90 44.9 273 2021 1,071.3 2.94 276 211 32.7 0.070 5.69 46.6 282 Maximum 1,787.4 4.88 534 276 215 32.7 1.497 8.37 46.6 282 Minimum 1,071.3 2.94 344 148 117 17.4 0.027 4.28 27.6 230 Average 1,502.9 4.11 418 196 164 22.1 0.184 5.80 37.0 251 #Years 42 42 32 42 42 42 42 42 42 42 RAW INFLUENT Influent Flows Raw Influent Annual Trends Annual Trends 8 2,400 600 7 2,100 500 6 1,800 0 5 1,500 400 � J 4 1,200 rn 300 m E Q 3 900 200 2 600 1 300 100 —�Daily Ave MGD Yearly Total MG t COD +BOD —91—SS Ammonia-Nitrogen Total Phosphorus Annual Trends Annual Trends 35 10 30 9 8 25 7 20 6 J J rn 5 £ 15 £ 4 10 3 2 5 1 0 a 0 a RAW INFLUENT Chlorides &TDS Chemical Oxygen Demand (COD) Annual Trends Annual Trends 100 400 800 90 360 700 80 320 70 280 600 J E 60 2ao J 500 m Ul a 50 200 J 400 L 40 160 £ U 30 120 300 20 80 200 10 40 100 0 0 s r r 0 a — Chlorides --- TDS Linear(Chlorides) Linear(TDS) Biochemical Oxygen Demand (BOD) Suspended Solids (SS) Annual Trends Annual Trends 400 300 350 250 300 2 250 00 J J rn 200 6 150 E E 150 100 100 50 50 0 a 0 a BIOCHEMICAL OXYGEN DEMAND UNIT PROCESS PERFORMANCE 2021 Removal Month Raw Primary Sec Final % January 286 191 43.4 6.05 98 February 289 190 39.6 9.80 97 March 284 180 35.8 7.73 97 April 272 181 34.8 9.24 97 May 287 215 65.5 7.14 98 June 293 300 61.4 7.49 97 July 316 240 34.2 13.49 96 August 284 230 52.9 9.22 97 September 205 132 18.4 4.46 98 October 257 165 31.2 5.74 98 November 271 188 47.1 5.25 98 December 281 186 26.5 8.69 97 12 Month Ave 277 199 39.8 7.92 97 % Removal 28 80 80 97 Biochemical Oxygen Demand Percent Removal 100 90 > 80 0 E 70 0 60 50 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec —�Final Effluent Linear(Final Effluent) SUSPENDED SOLIDS UNIT PROCESS PERFORMANCE 2021 Removal Month Raw Primary Sec Final % January 212 116.4 11.1 2.84 99 February 213 94.8 12.3 2.67 99 March 197 93.9 11.2 2.69 99 April 211 111.2 14.7 3.63 98 May 218 93.2 12.1 2.35 99 June 242 97.5 10.7 2.11 99 July 246 130.3 24.9 8.74 96 August 237 141.3 20.7 4.99 98 September 145 76.9 10.1 4.72 97 October 207 119.0 9.9 2.96 99 November 205 94.6 10.1 2.23 99 December 207 119.4 15.7 4.64 98 12 Month Ave 211 108.3 13.8 3.79 98 % Removal 49 87 73 98 Suspended Solids Percent Removal 100 90 80 0 E m 70 0 60 50 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec -A-Final Effluent Linear(Final Effluent) FINAL EFFLUENT ANNUALTRENDS <---FLOW---> Total Total Daily COD BOD SS NH3-N NO3-N TKN Total-P Cl TDS Turbidity CIZ Coliforms Year MG MGD mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L NTU mg/L Total Fecal/E.c2i pH 1980 1,418.20 4.32 22.0 3.0 2.0 5.5 5.75 0.40 148 551 0.7 2.8 7.38 1981 1,354.60 3.90 20.0 2.0 2.0 3.3 13.47 0.83 80 455 0.9 0.7 7.74 1982 1,807.90 5.10 23.0 4.0 4.0 3.1 7.87 0.81 88 410 1.8 2.6 7.65 1983 1,737.60 4.85 18.0 2.0 2.0 1.0 8.50 0.72 94 426 1.0 1.8 7.86 1984 1,566.70 4.33 16.0 2.0 1.0 1.6 8.24 0.39 103 436 0.7 1.8 7.65 1985 1,532.40 4.24 20.0 2.0 3.0 4.5 5.15 0.17 92 395 1.1 4.9 7.59 1986 1,660.50 4.59 17.0 2.0 2.0 5.3 4.95 0.20 82 341 1.0 4.9 7.12 1987 1,657.20 4.81 19.0 2.0 4.0 7.7 4.83 0.23 117 452 1.4 3.9 7.25 1988 1,619.90 4.42 14.0 2.0 3.0 6.6 9.29 0.12 136 480 1.0 2.8 7.21 1989 1,769.70 4.89 40.0 6.0 5.0 13.9 4.93 15.6 3.80 76 326 2.5 13.6 2.9 2.0 7.10 1990 1,697.30 4.76 37.0 6.0 4.0 8.4 8.39 10.1 3.80 83 387 2.3 14.6 2.0 2.0 7.30 1991 1,610.80 4.46 37.0 6.0 4.0 5.9 9.71 7.8 3.55 92 367 2.6 10.3 2.0 2.0 7.35 1992 1,608.40 4.39 41.0 7.0 4.0 9.6 6.46 11.2 5.05 64 289 3.1 4.4 3.7 2.1 7.32 1993 1,795.00 4.94 51.0 8.0 4.0 13.8 7.03 15.6 3.79 60 266 3.1 5.3 2.1 2.0 7.32 1994 1,638.20 4.50 43.1 7.6 3.8 20.6 1.30 22.1 3.21 59 253 2.9 4.1 3.3 2.0 7.41 1995 1,925.70 5.27 39.4 7.4 5.0 20.5 0.03 21.1 2.69 51 236 2.6 4.4 2.2 2.0 7.46 1996 1,965.80 5.37 37.3 7.0 4.4 18.6 0.13 20.6 2.50 44 221 2.5 4.0 2.1 2.0 7.64 1997 1,872.30 5.12 37.0 6.9 3.7 19.3 0.25 20.7 2.59 50 226 2.8 6.1 2.1 2.0 7.62 1998 1,693.40 4.64 35.6 6.9 4.0 18.6 0.28 21.1 2.56 48 227 2.6 4.6 2.1 2.0 7.53 1999 1,742.20 4.78 34.8 6.5 3.1 19.3 0.16 19.8 2.65 49 220 2.4 4.2 2.8 2.0 7.49 2000 1,685.90 4.74 42.4 7.9 3.9 20.7 0.04 20.9 2.55 53 226 2.8 4.5 2.1 2.0 7.49 2001 1,565.40 4.29 46.9 8.7 5.1 19.1 0.54 21.6 2.87 58 241 4.5 5.2 2.0 2.0 7.43 2002 1,581.80 4.33 41.2 6.8 3.0 19.8 0.64 21.6 2.79 55 231 3.7 5.5 2.0 2.0 7.44 2003 1,537.50 4.21 45.9 7.8 3.3 22.2 0.10 24.2 2.83 57 240 4.1 5.7 2.1 2.0 7.54 2004 1,483.30 4.05 47.4 7.9 3.8 23.1 0.04 26.3 3.19 56 242 4.8 6.0 2.1 2.0 7.47 2005 1,496.68 4.21 44.9 7.4 3.5 21.1 0.74 21.7 3.06 51 250 4.3 6.2 2.0 2.0 7.69 2006 1,588.08 4.35 47.8 6.6 2.7 21.2 0.07 21.7 3.09 48 242 4.4 6.0 2.0 2.0 7.69 2007 1,380.03 3.78 47.5 7.5 3.3 22.2 0.44 24.5 3.38 50 255 4.4 6.5 2.0 2.0 7.70 2008 1,343.14 3.67 40.5 6.0 2.9 20.2 1.60 21.5 3.61 54 255 4.1 5.3 2.0 2.0 7.64 2009 1,455.20 3.98 45.7 8.6 3.1 21.9 1.02 22.8 3.66 50 250 4.5 6.1 2.2 1.9 7.61 2010 1,500.48 4.11 44.6 5.5 3.0 22.3 0.88 25.0 3.38 50 246 3.5 6.3 1.9 1.8 7.70 2011 1,616.50 4.43 40.6 6.7 3.7 21.5 0.47 30.3 2.75 46 238 3.3 5.5 1.9 1.8 7.71 2012 1,445.96 3.95 9.0 2.7 22.4 0.79 26.1 2.88 49 242 3.4 5.4 6.4 6.2 7.71 2013 1,409.31 3.86 6.5 2.7 24.4 0.53 27.8 3.13 49 250 3.6 6.4 2.0 1.8 7.70 2014 1,329.45 3.65 7.9 2.2 25.8 0.57 29.1 3.32 52 253 3.4 5.6 2.1 1.8 7.65 2015 1,247.60 3.42 6.3 2.7 25.2 1.34 28.5 3.63 52 263 4.0 6.1 254.2 48.4 7.47 2016 1,410.41 3.85 7.4 3.9 23.9 0.92 28.2 3.34 58 269 3.9 9.3 2.1 1.5 7.79 2017 1,754.26 4.82 7.5 3.6 23.0 0.12 26.5 2.78 53 245 3.5 6.4 1.0 1.0 7.74 2018 1,405.73 3.85 10.0 4.9 28.3 0.21 31.1 3.38 57 268 4.3 7.3 1.1 1.0 7.84 2019 1,429.71 3.92 7.8 2.9 27.2 0.38 28.8 3.44 57 266 3.6 7.0 1.1 1.0 7.83 2020 1,243.81 3.40 8.5 4.9 30.2 0.21 30.8 3.72 58 271 4.2 6.7 0.9 0.5 7.83 2021 1,159.91 3.18 7.8 3.8 28.0 1.13 30.6 3.93 57 278 4.4 7.3 0.6 0.5 7.73 Permit Max 300 45 60 20 240' Permit Ave 60 30 30 10 232 Maximum 1,965.80 5.37 51.0 10.0 5.1 30.2 13.47 31.1 5.05 148 551 4.8 14.6 254.2 48.4 7.86 Minimum 1,159.91 3.18 14.0 2.0 1.0 1.0 0.03 7.8 0.12 44 220 0.7 0.7 0.6 0.5 7.10 Average 1,565.33 4.33 35.6 6.2 3.4 17.2 2.84 22.9 2.64 66 297 3.0 5.7 9.8 3.3 7.56 #Years 42 42 32 42 42 42 42 33 42 42 42 42 42 33 33 42 FINAL EFFLUENT Effluent Flows Chemical Oxygen Demand Annual Trends Annual Trends 10 3,000 50 9 2,700 8 2,400 48 7 2,100 46 C 6 1,800 5 1,500 44 d Q 4 1,200 £ 42 3 900 2 600 40 1 300 0 0 38 2000200120022003200420052006200720082009201020112012201320142015201620172018201920202021 36 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 20152016 2017 2018 2019 20202021 t Daily Ave MGD t Yearly Total MG Biochemical Oxygen Demand Suspended Solids Annual Trends Annual Trends 30.0 30.0 25.0 25.0 20.0 20.0 rn 15.0 6 15.0 E E 10.0 10.0 5.0 5.0 0.0 0.0 2000200120022003200420052006200720082009201020112012201320142015201620172018201920202021 2000200120022003200420052006200720082009201020112012201320142015201620172018201920202021 FINAL EFFLUENT Ammonia-Nitrogen Total Phosphorus Annual Trends Annual Trends 30 10 9 25 $ 20 7 6 J J 15 5 4 10 3 5 2 1 0 0 2000200120022003200420052006200720082009201020112012201320142015201620172018201920202021 2000200120022003200420052006200720082009201020112012201320142015201620172018201920202021 Nitate-Nitrogen Chlorides &TDS Annual Trends Annual Trends 20 350 700 300 600 15 250 500 J E 200 400 m m E J a vi 10 0 150 300 £ E 100 200 5 50 100 0 0 2000200120022003200420052006200720082009201020112012201320142015201620172018201920202021 0 2000200120022003200420052006200720082009201020112012201320142015201620172018201920202021 Chlorides �TDS Linear(Chlorides) Linear(TDS) FINAL EFFLUENT Turbidity Total Chlorine Annual Trends Annual Trends 20 20 15 15 10 m 10 z E 5 5 0 0 2000200120022003200420052006200720082009201020112012201320142015201620172018201920202021 2000200120022003200420052006200720082009201020112012201320142015201620172018201920202021 pH Annual Trends 11 10 9 8 x a 7 6 5 4 2000200120022003200420052006200720082009201020112012201320142015201620172018201920202021 Annual Metals Report Raw Influent Ca Mg K Na Al As Ba Be Ag Cd Cr Cu mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 01/21/2010 17.1 4.11 10.6 41.7 450 2.01 <2 <10 <2 2 28.2 04/08/2010 19 4.3 9.7 39 500 1.8 34 <1 <0.5 <0.5 2.5 30 07/26/2010 21 4.3 12 43 510 2.7 24 <1 <0.5 <0.5 1.6 43 10/11/2010 22 4.3 11 42 810 2.7 30 <1 <0.5 <0.5 1.8 80 11/22/2010 19 3.9 11 38 470 2 26 <2 <2 <2 3 40 04/06/2011 19.8 4.24 8.29 34.1 310 <2 43 <2 <10 <2 <2 21.7 07/07/2011 22.7 4.66 11.2 41.5 633 2.41 39.1 <1 0.744 <0.5 1.53 65 11/13/2012 21 4.3 11 36 310 2 31 <2 <2 <2 2 34 11/25/2013 20 4.1 12 40 300 3 23 <2 <2 <2 2 31 11/11/2014 18 4.0 12 42 300 3 40 <2 <2 <2 2 37 11/10/2015 19 4.6 12 43 260 2 30 <2 <2 <2 <2 35 11/01/2016 19 4 10 37 300 <4 30 <4 <4 <4 <4 29 08/15/2017 21 2 6 43 200 <4 30 <4 <4 <4 <4 48 11/28/2018 20 4 12 39 200 4 20 <4 <4 <4 4 31 12/03/2019 21 5 11 43 300 <5 34 <5 <5 <5 <5 36 12/14/2020 21 5.1 14 43 210 <5 27 <5 <5 <5 <5 58 09/29/2021 16 <5 14 45 <500 <4 30 <4 <4 <4 4 71 Fe Hg Mn Mo Ni Pb Se Sb TI V Zn ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 01/21/2010 540 <0.2 43 14 3 <2 <10 <2 <1 <2 100 04/08/2010 700 <0.2 49 11 <5 1.2 <5 <1 <1 5.3 97 07/26/2010 800 <0.2 37 13 <5 1.2 <5 <1 <1 3.3 110 10/11/2010 1000 <0.2 44 16 <5 1.6 <5 <1 <1 3.3 130 11/22/2010 680 0.5 48 22 3 <2 <10 <2 <1 2 110 04/06/2011 716 <0.2 37.9 8 <2 <2.5 <10 <2 <1 <2 82.7 07/07/2011 1270 <0.2 57 13.6 <5 1.97 <5 <1 <1 4.04 150 11/13/2012 760 <0.2 50 11 3 <2 <10 <2 <1 3 120 11/25/2013 600 <0.1 42 12 2 <2 <10 <2 <4 2 110 11/11/2014 630 <0.1 45 17 3 <2 <10 <2 <1 3 140 11/10/2015 670 0.2 25 12 <2 <2 <10 <2 1 <2 110 11/01/2016 800 <0.1 58 12 <4 4 <20 <4 <2 <4 170 08/15/2017 500 <0.1 62 12 4 <4 <20 <4 <2 <4 180 11/28/2018 1000 <0.1 60 <30 <4 4 <20 <4 <2 <4 80 12/03/2019 800 <0.1 64 8 <5 <5 <25 <5 <1 <4 110 12/14/2020 760 <0.1 53 10 <5 <5 <25 <5 <2.5 <5 110 09/29/2021 <500 <1 48 <20 6 <4 <20 <4 <2 <4 140 Annual Metals Report Final Effluent Ca Mg K Na Al As Ba Be Ag Cd Cr Cu mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 01/21/2010 15.6 3.94 10.8 52.8 80 2.15 <2 21.6 <2 <2 <20 04/08/2010 16 3.8 9.3 44 <20 1.2 8.7 <1 <0.5 <0.5 <1 7.7 07/26/2010 21 4.7 13 64 180 2 8.6 <1 <0.5 <0.5 <1 11 10/11/2010 19 4.2 12 53 <20 1.9 8.2 <1 <0.5 <0.5 <1 14 11/22/2010 17 3.7 11 50 <50 <2 8 <2 <2 <2 <2 9 04/06/2011 16.7 3.78 7.88 40.3 <50 2.64 25 <2 <10 <2 <2 <20 07/07/2011 19 4.38 11.7 47.8 <20 1.09 9.97 <1 <0.5 <0.5 <1 6.7 11/09/2011 17 3.7 10 39 <50 <2 12 <2 <2 <2 <2 32 11/13/2012 19 4.1 11 47 <50 <2 11 <2 <2 <2 <2 10 11/25/2013 18 4 12 52 <100 2 5 <2 <2 <2 <2 13 11/11/2014 17 3.7 12 51 <50 2 <10 <2 <2 <2 <2 14 11/10/2015 18 4.3 13 53 <50 2 10 <2 <2 <2 <2 8 11/01/2016 16 3 10 45 <200 <4 <20 <4 <4 <4 <4 8 08/15/2017 19 4.5 13 50 <50 <2 10 <2 <2 <2 <2 10 11/28/2018 19 4.5 12 52 <50 <2 <10 <2 <2 <2 <2 10 12/03/2019 16 3 10 47 <100 2 <10 <2 <2 <2 3 15 12/14/2020 18 4.5 13 53 <50 <5 <25 <5 <5 <5 <5 17 09/29/2021 19 4.3 14 55 <50 <4 <20 <4 <4 <4 <4 17 Fe Hg Mn Mo Ni Pb Se Sb TI V Zn ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 01/21/2010 90 <0.2 28.2 12 2 <2 <10 <2 <1 <2 18.6 04/08/2010 61 <0.2 33 11 <5 <0.5 <5 <1 <1 4.9 29 07/26/2010 190 <0.2 31 13 <5 <0.5 <5 <1 <1 <3 <20 10/11/2010 94 <0.2 29 11 <5 <0.5 <5 <1 <1 <3 23 11/22/2010 100 <0.2 32 24 <2 <2 <10 <2 <1 <2 30 04/06/2011 59.4 <0.2 23.7 7 <2 <2.5 <10 <2 <1 <2 22.1 07/07/2011 88.9 <0.2 70.2 9.31 <5 <0.5 <5 <1 <1 <3 20.4 11/09/2011 120 <0.2 43 13 <2 <2 <10 <2 2 <2 110 11/13/2012 110 <0.2 33 10 <2 <2 <10 <2 <1 <2 40 11/25/2013 100 <0.1 29 10 <2 <2 <10 <2 <4 <2 50 11/11/2014 130 <0.1 30 11 <2 <2 <10 <2 <1 <2 30 11/10/2015 140 <0.1 18 10 <2 <2 <10 <2 <1 <2 30 11/01/2016 <200 <0.1 <40 10 <4 <4 <20 <4 <2 <4 50 08/15/2017 170 <0.1 43 11 3 <2 <10 <2 <1 <2 <120 11/28/2018 230 <0.1 42 <20 <2 <2 <10 <2 <1 <2 <20 12/03/2019 100 <0.1 36 12 2 <2 <10 <2 <1 <4 20 12/14/2020 <50 <0.1 36 9 <5 <5 <25 <5 <2.5 <5 <50 09/29/2021 <50 <0.1 43 <20 <4 <4 <20 <4 <2 <4 <40 South Tahoe PUD Biosolids Cake Metals Results reported as wet weight Solids As Be Cd Cr Cu Pb Hg Mo Ni Se Ag Zn Site Date ID# % mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg Cake 02/03/14 AG39474 29.0% 0.7 < 0.3 < 0.3 1.8 33 1.1 0.16 1.9 1.3 < 2.0 < 0.3 92 Cake 05/12/14 AG40792 27.0% 0.6 < 0.3 < 0.3 1.8 33 1.0 0.11 1.3 1.4 < 2.0 < 0.3 85 Cake 08/13/14 AG42401 28.0% 0.9 < 0.3 0.3 1.9 43 2.1 0.08 2.5 1.2 < 2.0 0.4 120 Cake 11/11/14 AG43808 28.0% 0.9 < 0.3 0.4 1.9 35 1.2 0.08 2.0 1.3 < 2.0 < 0.3 97 Cake 02/23/15 AG45177 46.0% 1.0 < 0.5 < 0.5 2.5 54 1.5 0.15 2.6 1.7 < 2.5 < 0.5 150 Cake 05/19/15 AG46276 36.0% 1.4 < 0.4 < 0.4 2.4 56 1.9 0.20 2.4 1.6 < 2.0 < 0.4 155 Cake 08/03/15 AG47322 45.0% 1.1 < 0.5 < 0.5 1.7 57 1.7 0.11 2.6 1.4 < 3.0 < 0.5 180 Cake 11/10/15 AG48725 28.0% 0.9 < 0.3 < 0.3 0.9 32 1.0 0.08 1.6 1.0 < 1.5 < 0.3 92 Cake 02/02/16 AG49699 28.0% 1.0 < 0.3 < 0.3 2.0 36 1.0 0.06 1.8 1.3 < 1.5 0.3 89 Cake 05/03/16 AG50811 33.0% 1.0 < 0.3 < 0.3 2.3 29 1.3 0.06 1.6 1.3 < 2.0 < 0.3 91 Cake 08/08/16 AG52307 28.0% 0.9 < 0.3 < 0.3 1.6 35 1.1 0.05 1.8 1.0 < 1.4 < 0.3 130 Cake 11/01/16 AG53555 26.0% 1.0 < 0.3 < 0.3 2.0 32 1.0 < 0.008 2.0 1.0 < 1.5 < 0.3 100 Cake 02/13/17 AG54852 25.0% 0.8 < 0.2 < 0.2 1.9 28 1.8 0.04 1.3 1.5 < 1.2 1.4 70 Cake 05/22/17 AG56207 15.0% 0.4 < 0.2 < 0.2 0.9 16 0.9 0.05 0.9 0.7 < 0.8 < 0.2 44 Cake 08/15/17 AG57585 26.0% 0.8 < 0.3 < 0.3 1.6 36 0.9 0.06 1.7 1.4 < 1.3 < 0.3 140 Cake 11/14/17 AG58968 28.0% 1.3 < 0.1 0.2 1.8 82 1.3 0.10 2.8 1.3 0.5 0.5 280 Cake 02/21/18 AG60195 25.0% 0.6 < 0.3 < 0.3 1.6 28 0.7 0.04 1.4 1.0 < 1.2 < 0.3 78 Cake 06/13/18 AG61825 27.0% 0.8 < 0.3 < 0.3 1.4 46 0.9 0.05 2.6 0.9 < 1.3 0.4 120 Cake 09/19/18 AG63367 28.0% 1.1 < 0.3 0.6 2.2 53 1.1 0.07 3.4 1.4 < 1.4 0.6 140 Cake 11/28/18 AG64325 34.0% 1.4 < 0.3 0.3 3.1 48 1.4 0.08 3.7 1.7 < 1.7 0.3 120 Cake 02/13/19 AG65309 29% 0.7 < 0.3 < 0.3 2.6 32 0.8 0.18 1.8 1.6 < 1.4 < 0.3 81 Cake 06/19/19 AG67222 28% 0.8 < 0.3 < 0.3 2.0 54 3.0 0.05 2.0 2.0 < 1.4 < 0.3 130 Cake 09/18/19 AG68788 25% 1.2 < 0.3 0.3 2.5 48 1.2 0.06 2.8 1.5 < 1.2 0.3 152 Cake 12/03/19 AG69847 34% 1.0 < 0.3 0.4 2.4 37 1.4 0.10 1.9 1.4 < 1.6 < 0.3 100 Cake 02/20/20 AG70851 30% 0.6 < 0.3 0.3 2.4 34 0.6 0.03 1.3 1.8 < 1.5 < 0.3 88 Cake 06/10/20 AG72311 28% 1.3 < 0.3 0.4 2.8 49 1.3 0.07 1.8 1.6 < 1.4 0.3 150 Cake 09/13/20 AG73823 29% 1.0 < 0.3 0.8 2.0 49 1.2 0.06 1.8 1.8 < 1.4 < 0.3 150 Cake 12/14/20 AG75275 26% 1.0 < 0.3 < 0.3 2.7 45 0.8 0.05 1.6 1.3 < 1.3 < 0.3 94 Cake 03/02/21 AG76345 24% 0.5 < 0.2 0.2 1.7 32 1.0 0.20 1.4 1.4 < 1.2 < 0.2 85 Cake 05/17/21 AG77553 25% 0.4 < 0.3 0.5 2.3 30 2.0 0.06 1.4 1.6 < 2 0.3 84 Cake 09/29/21 AG79977 27% 1.0 < 1.0 < 1.0 2.0 68 1.0 0.09 3.0 2.0 < 5 < 1.0 140 Cake 12/15/21 AG81265 25% < 1.0 < 1.0 < 1.0 1.0 33 1.0 0.04 2.0 2.0 < 5 < 1.0 110 Maximum 46% 1.4 < 1.0 1.0 3.7 82 8.9 0.20 3.7 2.0 5.0 1.4 280 Minimum 15% 0.4 < 0.1 < 0.2 0.9 16 0.6 < 0.01 0.9 0.7 < 0.5 < 0.2 44 Average 28.9% 0.9 0.3 0.4 2.1 42 1.5 0.09 2.0 1.4 1.8 0.4 114 #Tests 40 40 40 40 40 40 40 40 40 40 40 40 40 South Tahoe PUD Biosolids Cake Metals Results reported as dry weight Solids As Be Cd Cr Cu Pb Hg Mo Ni Se Ag Zn Site Date ID# % mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg Cake 02/03/14 AG39474 29.0% 2 < 1 < 1 6 114 4 0.55 7 4 < 7 < 1 317 Cake 05/12/14 AG40792 27.0% 2 < 1 < 1 7 122 4 0.41 5 5 < 7 < 1 315 Cake 08/13/14 AG42401 28.0% 3 < 1 1 7 154 8 0.29 9 4 < 7 1 429 Cake 11/11/14 AG43808 28.0% 3 < 1 1 7 125 4 0.29 7 5 < 7 < 1 346 Cake 02/23/15 AG45177 46.0% 2 < 1 < 1 5 117 3 0.33 6 4 < 5 < 1 326 Cake 05/19/15 AG46276 36.0% 4 < 1 < 1 7 156 5 0.56 7 4 < 6 < 1 431 Cake 08/03/15 AG47322 45.0% 2 < 1 < 1 4 127 4 0.24 6 3 < 7 < 1 400 Cake 11/10/15 AG48725 28.0% 3 < 1 < 1 3 114 4 0.29 6 4 < 5 < 1 329 Cake 02/02/16 AG49699 28.0% 4 < 1 < 1 7 129 4 0.21 6 5 < 5 1 318 Cake 05/03/16 AG50811 33.0% 3 < 1 < 1 7 88 4 0.18 5 4 < 6 < 1 276 Cake 08/08/16 AG52307 28.0% 3 < 1 < 1 6 125 4 0.18 6 4 < 5 < 1 464 Cake 11/01/16 AG53555 26.0% 4 < 1 < 1 8 123 4 < 0.03 8 4 < 6 < 1 385 Cake 02/13/17 AG54852 25.0% 3 < 1 < 1 8 112 7 0.16 5 6 < 5 6 280 Cake 05/22/17 AG56207 15.0% 3 < 1 < 1 6 107 6 0.33 6 5 < 5 < 1 293 Cake 08/15/17 AG57585 26.0% 3 < 1 < 1 6 138 3 0.23 7 5 < 5 < 1 538 Cake 11/14/17 AG58968 28.0% 5 < 0.5 1 6 293 5 0.36 10 5 2 2 1000 Cake 02/21/18 AG60195 25.0% 2 < 1 < 1 6 112 3 0.17 6 4 < 5 < 1 312 Cake 06/13/18 AG61825 27.0% 3 < 1 < 1 5 170 3 0.20 10 3 < 5 1 444 Cake 09/19/18 AG63367 28.0% 4 < 1 2 8 189 4 0.25 12 5 < 5 2 500 Cake 11/28/18 AG64325 34.0% 4 < 1 1 9 141 4 0.24 11 5 < 5 1 353 Cake 02/13/19 AG65309 29.0% 2 < 1 < 1 9 110 3 0.62 6 6 < 5 < 1 279 Cake 06/19/19 AG67222 28.0% 3 < 1 < 1 7 193 11 0.18 7 7 < 5 < 1 464 Cake 09/18/19 AG68788 25.0% 5 < 1 1 10 192 4.8 0.24 11 6 < 5 1 608 Cake 12/03/19 AG69847 34% 3 < 1 1 7 109 4.1 0.29 6 4 < 5 < 1 294 Cake 02/20/20 AG70851 30% 2 < 1 1 8 113 2.0 0.11 4 6 < 5 < 1 293 Cake 06/10/20 AG72311 28% 5 < 1 1 10 175 4.6 0.25 6 6 < 5 1 536 Cake 09/13/20 AG73823 29% 3 < 1 3 7 169 4.1 0.19 6 6 < 5 < 1 517 Cake 12/14/20 AG75275 26% 4 < 1 < 1 10 173 3.0 0.19 6 5 < 5 < 1 362 Cake 03/02/21 AG76345 24% 2 < 1 1 7.1 133 4.2 0.83 6 6 < 5 < 1 354 Cake 05/17/21 AG77553 25% 2 < 1 2 9.2 120 8.0 0.26 6 6 < 8 1 336 Cake 09/29/21 AG79977 27% 4 < 4 < 4 7.4 252 3.7 0.33 11 7 < 19 < 4 519 Cake 12/15/21 AG81265 25% < 4 < 4 < 4 4.0 132 4.0 0.16 8 8 < 20 < 4 440 Maximum 46.0% 5 4 4 12 293 29 0.83 12 8 20 6 1000 Minimum 15.0% 2 0 1 3 88 2 0.03 4 3 2 1 276 Average 28.9% 3 1 1 7 147 5 0.31 7 5 6 1 397 #Tests 40 40 40 40 40 40 40 40 40 40 40 40 40 Percent As Be Cd Cr Cu Pb Hg Mo Ni Se Ag Zn >0 >0 >0 >0 >0 >0 >0 >0 >0 >0 >0 >0 >0 SOUTH TAHOE PUBLIC UTILITY DISTRICT WASTEWATER TREATMENT PLANT COMPLIANCE RECORD Number of Number Chemical of Compliance Year Tests Violations % Comments 1983 1,983 17 99.1 1984 2,480 61 97.5 1985 2,811 9 99.7 1986 3,146 69 97.8 1987 3,018 42 98.6 1988 3,323 9 99.7 1989 2,432 14 99.4 1990 2,098 0 100.0 1991 2,068 1 99.95 pH 1992 2,168 0 100.0 1993 2,163 2 99.91 COD and Settleable Solids 1994 2,152 0 100.0 1995 2,047 1 99.95 Settleable Solids 5/6/95=0.3 1996 2,064 0 100.0 1997 2,138 0 100.0 1998 2,149 0 100.0 1999 2,201 0 100.0 2000 2,110 0 100.0 2001 2,153 0 100.0 2002 2,137 0 100.0 2003 2,159 0 100.0 2004 2,078 0 100.0 2005 2,069 0 100.0 2006 2,191 0 100.0 2007 2,172 0 100.0 2008 2,159 0 100.0 2009 2,160 0 100.0 2010 2,161 0 100.0 2011 2,093 0 100.0 Stopped COD tests 06/2011 2012 2,063 0 100.0 2013 2,050 0 100.0 2014 2,054 0 100.0 2015 1,322 0 100.0 Settleable Solids and Turbidity no longer in Permit 2016 1,310 0 100.0 Total Coliform by Quanti-Tray 2017 1,290 0 100.0 2018 1,302 0 100.0 2019 1,308 0 100.0 2020 1,295 0 100.0 2021 1,281 0 100.0 Results do not include flow measurements Discharge Violations O 0 0 00 0 c 0 r 0 �o 0 N 13 O _ _ _ _ _ _ _ _ _ _ _ _ N N N N N N N N N N N N N N N N N N N N N N (D (D (D (D (O (O (O (O (D (D (D (D (D CO O O O O W W W W w w w (O (O O O CO O (O O O O O OO OO OO OO OO OO O O O O O O O O O O IQ IQ W A (J W -I W (O 0 Na W A (J m �l W (O O — IQ W O A (P W -I W (O O + N W A (11 W -I W (O O , PRETREATMENT PROGRAM UPDATE PRETREATMENT ANNUAL REPORT COVER SHEET NPDES Permit Holder of Sewer Authority Name: South Tahoe Public Utility District Report Date: April 15, 2022 Period Covered by this Report: January 1, 2021 to December 31, 2021 Name of Wastewater Treatment Plant NPDES Permit Number South Tahoe Public Utility District Board Order No: R6T-2004-0010 WDIS No. 6A095900700 Person to contact concerning information contained in this report: Name: Jeff Lee Title: Plant Operations Manager Mailing Address 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Telephone No. (530) 544-6474 1 have personally examined and am familiar with the information submitted in this document and attachments. Based upon my inquiry of those individuals immediately responsible for obtaining the information reported herein, I believe that the submitted information is true, accurate, and complete. Date - Signature of Official Laboratory Director Title ANNUAL PRETREATMENT REPORT 2021 Section 1 —Results of Wastewater Treatment Plant Sampling and Analysis The wastewater treatment plant influent, effluent and sludge were sampled September 29, 2021, for pollutants EPA has identified under Section 307(a) of the Clean Water Act. All the results are attached. Due to an oversight on the part of contract laboratory, EPA Method 8260, Volatile Organic Compounds (VOC), was not done on the above-mentioned sludge. A replacement sample of plant sludge was collected on April 5, 2022 and analyzed for VOC. Results are pending. If any of these results are found to be in violation, of Section 307(a) then Lahontan RWQCB will be immediately notified. Results for March 2, 2021, plant sludge VOC sample are also attached. These results include EPA Method 8260. Section 2—Upset,Interference, and Pass-Through Incidents No upset, interference, or pass-through events occurred during the period. Section 3—Baseline Monitoring Reports There was no industrial/commercial users notified regarding baseline monitoring requirements this period. Section 4—Updated List of Dischargers The list of industrial/commercial dischargers has been updated and is shown in table 4-A. This table indicates businesses added or deleted, and corresponding comments. Five (5) establishments were deleted because they were found to be no longer in business. Field verification and plan reviews have identified four (4) new businesses, which are included on the table. Section 5—Annual Industrial User Site Inspection Summary There were approximately 311 on-site inspections conducted during 2021. These inspections were primarily conducted at dischargers which have grease traps/interceptors and or sand/oil traps. However, this figure is considered conservative because many plan applications and reviews along with other functions assigned to District staff are done routinely. Section 6—Compliance and Enforcement Summary Inspections during the period covered in this pretreatment update resulted in the issuance 14 correction notices. Primarily, correction notices were issued for violations regarding grease trap/interceptor routine cleaning or other necessary repair work. Each correction notice issued was followed up by a re-inspection to ensure that the violation was corrected. All violations resulted in appropriate corrective action to remedy the violation. Section 7—Pretreatment Program Changes No changes to the program occurred during this report period. Section 8—Annual Pretreatment Budget Summary The cost of operating the pretreatment program for the period covered in this report was approximately $15,000.00. The funding comes from the general operating fund. Since there are no categorical or significant non-categorical industrial users, funds cannot be generated from user fees. Figures are based on Laboratory costs and two District Inspectors conducting on-site inspections of known users. No new equipment was purchased for the pretreatment program. Section 9—Sludge Disposal Changes No changes to the sludge disposal methods occurred this period. INDUSTRIAL USER LIST UPDATE 2021 Table 4-A GREASE TRAP/INTERCEPTOR&SAND/OIL INTERCEPTORS Inspectors Name: Master NEW NAME ADDRESS COMMENTS SUP&BIKES 871 Emerald Bay Rd. Coldwater Tap 2544 LTB Cup of Tahoe 2012 LTB Dragon Fly Bagel 3358 Sandy Way 50#Trap in back undersink NAME CHANGED NEW NAME OLD NAME Margarita's 1065 EBR Cantina Tahoe Bear Teahouse 3668 LTB Ares Wine Toulouse 901 Park Lew Marnels Bear Beach BBQ 3310 LTB CLOSED NAME ADDRESS COMMENTS Meyers Downtown Cafe 3200 HWY 50 Tahoe Paradise New cafe may re-open. Satos 3436 LTB Business closed/Vacant space The Brewery 3542 LTB Business changed to Snow Sport Realty Te s Villa Roma 3450 LTB Vacant The Boathouse 3411 LTB Closed ROUTEINFO How many traps/interceptors on your route? 259 How many total inspections were done? 311 How many correction notices were written? 14 SOUTH TAHOE PUBLIC UTILITY DISTRICT MEMORANDUM From ,Z The Lab i 1 Date: April 15, 2021 To: Jeff Lee, Manager of Wastewater Operations Cuz Cullen, Inspection Supervisor From: Dan Arce, Laboratory Director Topic: EPA Priority Pollutants 2021 Samples were collected from the Raw Influent, Final Effluent and Centrifuge Cake on September 29, 2021 , and were analyzed for metals and organic chemicals. Raw Influent and Final Effluent were 24-hour composites,with one exception. The Raw and Final VOC Samples which were grab samples collected during high flow conditions. The Centrifuge Cake sample was an 8-hour composite sample. The samples were analyzed for the Environmental Protection Agency's Priority Pollutant list to determine plant upset or pass-through. 1. Metals Metal results for Final Effluent were all below the drinking water primary Maximum Contaminant Levels (MCL). Both the Raw Influent and Final Effluent metal results were below the Soluble Threshold Limit Concentrations (STLC). The Centrifuge Cake (whole sample) had all metals below the Total Threshold Limit Concentrations (TTLC). Copper was above the STLC but below 10 x STLC. Selenium could potentially be above STLC but is below 10 x STLC. The State allows results from the total metals tests to be compared with (10 x STLC) to determine whether there is risk of the leachate from the solid material being hazardous. If the total metals results are less than 10 times STLC, then the leachate is considered safe. If the total metals results are greater than 10 times STLC, then a WET extraction of the solid material is performed and compared against the STLC. April 15, 2022 Page 2 Metal Concentrations Sample date: September 29, 2021 Drinking Raw Final Water Compound units Influent PQL Effluent PQL MCL Aluminum p /L ND 500 ND 50 1,000 Antimony /L ND 4 ND 4 6 Arsenic p /L ND 4 ND 4 10 Barium p /L 30 20 ND 20 1,000 Beryllium /L ND 4 ND 4 4 Cadmium p /L ND 4 ND 4 5 Calcium m /L 16 5 19 0.5 Chromium m /L 4 4 ND 4 50 Cobalt /L ND 4 ND 4 Copper /L 71 4 17 4 1,000 Iron p /L ND 500 ND 50 300 Lead /L ND 4 ND 4 15 Magnesium m /L ND 5 4.3 0.5 Manganese /L 48 4 43 4 50 Mercury p /L ND 0.1 ND 0.1 2 Molybdenum /L ND 20 ND 20 Nickel /L 6 4 ND 4 100 Potassium m /L 14 5 14 0.5 Selenium /L ND 20 ND 20 50 Silver p /L ND 4 ND 4 100 Sodium mg/L 45 5 55 0.5 Thallium p /L ND 2 ND 2 2 Vanadium p /L ND 4 ND 4 Zinc /L 140 40 ND 40 5,000 Notes:The samples for metals are 24-hour flow-proportioned composites. DALahontan\Priority Pollutants\Organics 2021.doc April 15, 2022 Page 3 Centrifuge Cake Metals Sample Date: December 14, 2020 Centrifuge Cake Date: 9/29/2021 1 D: AG79977 Wet Weight STLC Result 1OxSTLC TTLC mg/Kg mg/Kg mg/Kg mg/Kg > STLC 1OxSTLC > TTLC Antimony 15 <0.1 150 500 No No No Arsenic 5 1 50 50 No No No Barium 100 20 1,000 10,000 No No No Beryllium 0.75 < 1 7.5 75 No No No Cadmium 1 <1 10 100 No No No Chromium 5 2 50 2,500 No No No Cobalt 80 < 1 800 8,000 No No No Copper 25 68 250 2,500 No No Lead 5 1 50 1,000 No No No Mercury 0.2 0.09 2 20 No No No Molybdenum 350 3 3,500 3,500 No No No Nickel 20 2 200 2,000 No No No Selenium 1 < 5 10 100 No No Silver 5 < 1 50 500 No No No Thallium 7 < 0.5 70 700 No No No Vanadium 24 2 240 2,400 No No No Zinc 250 140 2,500 5,000 No No No D1Lahontan\Priority Pollutants\Organics 2021.doc April 15, 2022 Page 4 2. Organic Analyses Semi Volatile Organic Compounds, Chlorinated Pesticides and Chlorinated Herbicides were tested in the Raw Influent, Final Effluent and Centrifuge Cake. The detected compounds are tabulated below. Organic Compounds Test Results Detections September 29. 2021 Raw Final Centrifuge Influent Effluent Cake Compound /L p /L /K Acetone 60 ND Not analyzed Chloroform ND 1 Not analyzed Ethyl Benzene 0.6 ND Not analyzed Phenol 15.3 ND ND Toluene 3.8 ND Not analyzed ND: Not Detected Whereas Volatile Organic Compounds (VOCs)were tested in the Raw Influent and Final Effluent on September 29, 2021, VOCs were not tested in the Centrifuge Cake. This was an oversight on the part of the contract Laboratory. We collected a replacement sample on April 5, 2022. 1 included the email correspondence between STPUD and Fruit Growers Laboratory (FGL) at the end of this memo. I will alert the Lahontan RWQCB if the results are in violation of any section of the Clean Water Act We had collected Volatile Organic Compounds (VOCs)samples in the Raw Influent, Final Effluent and Centrifuge Cake on March 2 ,2021 . These results were included in the 2020 Lahontan Report. The detected compounds are tabulated below. Organic Compounds Test Results Detections March 2, 2021 Raw Final Centrifuge Influent Effluent Cake Compound pg/L pg/L pg/Kg Chloroform ND 0.86 ND 2-Butanone MEK ND ND 160,000 Acetone Not analyzed Not analyzed 210,000 Toluene ND ND 980 ND: Not Detected D1Lahontan\Priority Pollutants\Organics 2021.doc From: David Terz To: Dan Arce Cc: Misti Harris;Cindy Aguirre Subject: Re: Fwd: FGL Documents For SP 2113807 Date: Tuesday,April 5,2022 17:00:39 CAUTION:This ematf origfnotedoutsfdetheorgontzotfon. Do not click anylinksor attachments un�essyou know thesenderand are experttng the emaif. Dan If we get it by Thursday, we can run it here.....we have some other soils in house. Regards, David Terz QA Director Fruit Growers Laboratory 805-392-2024 On 4/5/22 4:47 PM, Dan Arce wrote: Hello Mr. Terz. Yes. We will be shipping tomorrow. A Rush arrangement would be great. Thank you. Dan Arce Lab Director South Tahoe Public Utility District 1275 Meadow Crest Drive South Lake Tahoe,CA 96150 Office:530.543.6231 Cell: 530.318.1477 From: David Terz<davidt(@fglinc.com> Sent:Tuesday, April 5, 2022 15:39 To: Dan Arce<darce(@stpud.us> Cc: Misti Harris<mistih(@fglinc.com>; Cindy Aguirre<cindya(@fglinc.com> Subject: Fwd: Fwd: FGL Documents For SP 2113807 CAUTION:Th s email orfgfr?atedootsfde the orggnizatfon. Do notclick any links or attachments unTessyoa know thesenderand are expeettng the emoff, Dan We are using a new lab for EPA 8260 (Zalco Labs) ; are you sampling and shipping out tomorrow? We can arrange with Zalco for a Rush Regards, David Terz QA Director Fruit Growers Laboratory 805-392-2024 Forwarded Message-------- Subject:Fwd: FGL Documents For SP 2113807 Date:Tue, 5 Apr 2022 15:06:22 -0700 From:Misti Harris<mistih(@fglinc.com> To:David Terz<davidt(@fglinc.com>, Cindy Aguirre<cindya(@fglinc.com> David, Please advise on what to tell Dan. See his response below. Forwarded Message-------- Subject:RE: FGL Documents For SP 2113807 Date:Tue, 5 Apr 2022 21:16:33 +0000 From:Dan Arce<darce(@stpud.us> To:Misti Harris<mistih(@fglinc.com> Hello Misti. Got it... Oh Boy. It is something I should have noticed sooner. Thank you for trying and I very much appreciate the rebate. My main concern is that I get results ASAP. I do not mind paying a little more for that. Should I send the sample to Babcock Laboratories tomorrow directly?That may save some time, but I will take your direction. Have a good day Misti wherever you are. Dan Arce Lab Director South Tahoe Public Utility District 1275 Meadow Crest Drive South Lake Tahoe,CA 96150 Office:530.543.6231 Cell: 530.318.1477 From: Misti Harris<mistihna fglinc.com> Sent:Tuesday, April 5, 2022 13:51 To: Dan Arce <darce @stpud.us> Subject: Re: FGL Documents For SP 2113807 CAUTION:This email prigtryatedoutside the organization, Do not clhck anylinksor attachments unTessyoa know thasenderared ore expecting theerrsail, Dan, I am so sorry to report that this analysis was not done. It was missed on the COC. Please resample, and of course there will be no charge for having it analyzed. My apologies, H Misti Harris Customer Services (805) 392-2000 ext2089 FGL Website FGL Facebook On 04/04/2022 4:27 PM, Dan Arce wrote: Hello Misti. Thank you for sending this file so quickly. Unfortunately, it does not include the results I am looking for. We requested that EPA-8260 be done on sample Lab ID#AG79977 Name: WW-10 Centrifuge Cake. I am assuming that was subcontracted to Babcock Laboratories since it was a solid sample.The results are not included in the Subcontract report. I am hoping that the results might still be found from Babcock. Can we please check? Crossing my fingers Misti.Take care. Dan Arce Lab Director South Tahoe Public Utility District 1275 Meadow Crest Drive South Lake Tahoe,CA 96150 Office:530.543.6231 Cell: 530.318.1477 From: mistih(@fglinc.com <mistih(@fglinc.com> Sent: Monday, April 4, 2022 16:00 To: Dan Arce <darce(@stpud.us> Subject: FGL Documents For SIP 2113807 CAUTION:Th semaflorrginotedoutsidetheorgon zation. Do notclk* anylfnksor attachments uWessyou know thesenderandareexpecting the email, Dear South Tahoe Public Utility District, Attached is a document(s) for Lab Number(s) SP 2113807. Included in the document is: Report(s) Report(s) If you have any questions please contact your project manager which may be different from the person sending this document. Sincerely, Misti Harris 805-392-2089 "CONFIDENTIALITY NOTICE: The information contained in this e-mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure, or distribution is prohibited. If you are not the intended recipient, and have received this communication in error, please contact the sender by reply e-mail and destroy all copies of the original message.Thank you. This email message has been delivered safely and archived online by Mimecast. This email message has been delivered safely and archived online by Mimecast. This email message has been delivered safely and archived online by Mimecast. Silver State Labs-Reno October 20, 2021 Si Ive r Sta to 1135 Financial Blvd Workorder 21100022 s Analytical Laboratories Reno,Nv89so2 •Sierra Environmental Monitoring (775)857-2400 FAX:(888)398-7002 www.ssalabs.com Dan Arce SOUTH TAHOE PUBLIC UTILITY DISTRICT 1275 Meadow Crest Drive South Lake Tahoe,CA 96150 Project: EPA Priority Pollutants/WW-0I Raw Influent Dear Dan Arce: It is the policy of Silver State Analytical Laboratory-Reno to strictly adhere to a comprehensive Quality Assurance Plan that ensures the data presented in this report are both accurate and precise. Silver State Analytical Laboratory-Reno maintains accreditation in the State of Nevada(NV-00015)and the State of California(ELAP 2990). The data presented in this report was obtained from the analysis of samples received under a chain of custody.Unless otherwise noted below,samples were received in good condition,properly preserved and within the hold time for the requested analyses.Any anomalies associated with the analysis of the samples have been flagged in the Analytical Report with an appropriate explanation in the Definitions&Qualifiers. Revised Report:Added Mn to Final Effluent sample per coc. Sincerely, C&� Carly Wood Laboratory Director 1135 Financial Blvd Reno,NV 89502 Revision vl Page 1 of 19 �1 Silver State Labs-Reno Analytical Report OASilvertateS 1135 Financial Blvd 1 Analytical Laboratories Reno,NV 89502 (775)857-2400 FAX:(888)398-7002 Workorder#: 21100022 r�Sierra Environmental Monitoring Date Reported: 10/20/2021 www.ssalabs.com p Client: SOUTH TAHOE PUBLIC UTILITY DISTRICT Sampled By: Auto/Ops Project Name: EPA Priority Pollutants/WW-01 Raw Influent PO#: Laboratory Accreditation Number: NVO15/CA2990 Laboratory ID Client Sample ID Date/Time Sampled Date Received 21100022-01 AG79973/WW-01 Raw Influent 09/29/2021 0:00 10/1/2021 Date/Time Data Parameter Method Result Units PQL Analyst Analyzed Flag Aluminum EPA 200.7 <0.5 mg/L 0.5 KK 10/05/2021 13:24 Antimony EPA 200.8 <0.004 mg/L 0.004 JF 10/06/2021 3:04 Arsenic EPA 200.8 <0.004 mg/L 0.004 JF 10/06/2021 3:04 Barium EPA 200.8 0.03 mg/L 0.02 JF 10/06/2021 3:04 Beryllium EPA 200.8 <0.004 mg/L 0.004 JF 10/06/2021 3:04 Cadmium EPA 200.8 <0.004 mg/L 0.004 JF 10/06/2021 3:04 Calcium EPA 200.7 16 mg/L 5 KK 10/05/2021 13:24 Chromium EPA 200.8 0.004 mg/L 0.004 JF 10/06/2021 3:04 Cobalt EPA 200.8 <0.004 mg/L 0.004 JF 10/06/2021 3:04 Copper EPA 200.8 0.071 mg/L 0.004 JF 10/06/2021 3:04 Iron EPA 200.7 <0.5 mg/L 0.5 KK 10/05/2021 13:24 Lead EPA 200.8 <0.004 mg/L 0.004 JF 10/06/2021 3:04 Magnesium EPA 200.7 <5 mg/L 5 KK 10/05/2021 13:24 Manganese EPA 200.8 0.048 mg/L 0.004 JF 10/06/2021 3:04 Mercury EPA 245.1 <0.001 mg/L 0.001 KK 10/07/2021 16:35 Molybdenum EPA 200.8 <0.02 mg/L 0.02 JF 10/06/2021 3:04 Nickel EPA 200.8 0.006 mg/L 0.004 JF 10/06/2021 3:04 Potassium EPA 200.7 14 mg/L 5 KK 10/05/2021 13:24 Selenium EPA 200.8 <0.02 mg/L 0.02 JF 10/06/2021 3:04 Silver EPA 200.8 <0.004 mg/L 0.004 JF 10/06/2021 3:04 Sodium EPA 200.7 45 mg/L 5 KK 10/05/2021 13:24 Thallium EPA 200.8 <0.002 mg/L 0.002 JF 10/06/2021 3:04 Vanadium EPA 200.8 <0.004 mg/L 0.004 JF 10/06/2021 3:04 Zinc EPA 200.8 0.14 mg/L 0.04 JF 10/06/2021 3:04 Revision vl Page 2 of 19 �1 Silver State Labs-Reno Analytical Report OASilvertateS 1135 Financial Blvd 1 Analytical Laboratories Reno,NV 89502 (775)857-2400 FAX:(888)398-7002 Workorder#: 21100022 r�Sierra Environmental Monitoring Date Reported: 10/20/2021 www.ssalabs.com p Client: SOUTH TAHOE PUBLIC UTILITY DISTRICT Sampled By: Auto/Ops Project Name: EPA Priority Pollutants/WW-01 Raw Influent PO#: Laboratory Accreditation Number: NVO15/CA2990 Laboratory ID Client Sample ID Date/Time Sampled Date Received 21100022-02 AG79976/WW-04 Final Effluent 09/29/2021 0:00 10/l/2021 Date/Time Data Parameter Method Result Units PQL Analyst Analyzed Flag Aluminum EPA 200.7 <0.05 mg/L 0.05 KK 10/05/2021 13:26 Antimony EPA 200.8 <0.004 mg/L 0.004 JF 10/06/2021 3:10 Arsenic EPA 200.8 <0.004 mg/L 0.004 JF 10/06/2021 3:10 Barium EPA 200.8 <0.02 mg/L 0.02 JF 10/06/2021 3:10 Beryllium EPA 200.8 <0.004 mg/L 0.004 JF 10/06/2021 3:10 Cadmium EPA 200.8 <0.004 mg/L 0.004 JF 10/06/2021 3:10 Calcium EPA 200.7 19 mg/L 0.5 KK 10/05/2021 13:26 Chromium EPA 200.8 <0.004 mg/L 0.004 JF 10/06/2021 3:10 Cobalt EPA 200.8 <0.004 mg/L 0.004 JF 10/06/2021 3:10 Copper EPA 200.8 0.017 mg/L 0.004 JF 10/06/2021 3:10 Iron EPA 200.7 <0.05 mg/L 0.05 KK 10/05/2021 13:26 Lead EPA 200.8 <0.004 mg/L 0.004 JF 10/06/2021 3:10 Magnesium EPA 200.7 4.3 mg/L 0.5 KK 10/05/2021 13:26 Manganese EPA 200.8 0.043 mg/L 0.004 JF 10/06/2021 3:10 Mercury EPA 245.1 <0.0001 mg/L 0.0001 KK 10/07/2021 16:35 Molybdenum EPA 200.8 <0.02 mg/L 0.02 JF 10/06/2021 3:10 Nickel EPA 200.8 <0.004 mg/L 0.004 JF 10/06/2021 3:10 Potassium EPA 200.7 14 mg/L 0.5 KK 10/05/2021 13:26 Selenium EPA 200.8 <0.02 mg/L 0.02 JF 10/06/2021 3:10 Silver EPA 200.8 <0.004 mg/L 0.004 JF 10/06/2021 3:10 Sodium EPA 200.7 55 mg/L 0.5 KK 10/05/2021 13:26 Thallium EPA 200.8 <0.002 mg/L 0.002 JF 10/06/2021 3:10 Vanadium EPA 200.8 <0.004 mg/L 0.004 JF 10/06/2021 3:10 Zinc EPA 200.8 <0.04 mg/L 0.04 JF 10/06/2021 3:10 Revision vl Page 3 of 19 �1 Silver State Labs-Reno Analytical Report OASilvertateS 1135 Financial Blvd 1 Analytical Laboratories Reno,NV 89502 (775)857-2400 FAX:(888)398-7002 Workorder#: 21100022 r�Sierra Environmental Monitoring Date Reported: 10/20/2021 www.ssalabs.com p Client: SOUTH TAHOE PUBLIC UTILITY DISTRICT Sampled By: Auto/Ops Project Name: EPA Priority Pollutants/WW-01 Raw Influent PO#: Laboratory Accreditation Number: NVO15/CA2990 Laboratory ID Client Sample ID Date/Time Sampled Date Received 21100022-03 AG79977/WW-10 Centrifuge Cake-Wet 09/29/2021 0:00 10/1/2021 Date/Time Data Parameter Method Result Units PQL Analyst Analyzed Flag Aluminum EPA 6010 88 mg/Kg 5 KK 10/14/2021 14:29 Antimony EPA 6020 <1 mg/Kg 1 JF 10/08/2021 19:41 S Arsenic EPA 6020 1 mg/Kg 1 JF 10/08/2021 19:41 Barium EPA 6020 20 mg/Kg 5 JF 10/08/2021 19:41 Beryllium EPA 6020 <1 mg/Kg 1 JF 10/08/2021 19:41 Cadmium EPA 6020 <1 mg/Kg 1 JF 10/08/2021 19:41 Calcium EPA 6010 820 mg/Kg 50 KK 10/14/2021 14:29 Chromium EPA 6020 2 mg/Kg 1 JF 10/08/2021 19:41 Cobalt EPA 6020 <1 mg/Kg 1 JF 10/08/2021 19:41 Copper EPA 6020 68 mg/Kg 1 JF 10/08/2021 19:41 Iron EPA 6010 50 mg/Kg 5 KK 10/14/2021 14:29 B Lead EPA 6020 1 mg/Kg 1 JF 10/08/2021 19:41 Magnesium EPA 6010 85 mg/Kg 50 KK 10/14/2021 14:29 Manganese EPA 6020 19 mg/Kg 1 JF 10/08/2021 19:41 Mercury SW-846 7471 B 0.09 mg/Kg 0.02 KK 10/15/2021 15:10 Molybdenum EPA 6020 3 mg/Kg 1 JF 10/08/2021 19:41 Nickel EPA 6020 2 mg/Kg 1 JF 10/08/2021 19:41 Percent Moisture SM 2540 G 73 % 0.1 AC 10/05/2021 9:56 Potassium EPA 6010 79 mg/Kg 50 KK 10/14/2021 14:29 Selenium EPA 6020 <5 mg/Kg 5 JF 10/08/2021 19:41 Silver EPA 6020 <1 mg/Kg 1 JF 10/08/2021 19:41 Sodium EPA 6010 <50 mg/Kg 50 KK 10/14/2021 14:29 Thallium EPA 6020 <0.5 mg/Kg 0.5 JF 10/08/2021 19:41 Vanadium EPA 6020 2 mg/Kg 1 JF 10/08/2021 19:41 Zinc EPA 6020 140 mg/Kg 10 JF 10/08/2021 19:41 Revision vl Page 4 of 19 �1 Silver State Labs-Reno Analytical Report OASilvertateS 1135 Financial Blvd 1 Analytical Laboratories Reno,NV 89502 (775)857-2400 FAX:(888)398-7002 Workorder#: 21100022 r�Sierra Environmental Monitoring Date Reported: 10/20/2021 www.ssalabs.com p Client: SOUTH TAHOE PUBLIC UTILITY DISTRICT Sampled By: Auto/Ops Project Name: EPA Priority Pollutants/WW-0I Raw Influent PO#: Laboratory Accreditation Number: NV015/CA2990 Laboratory ID Client Sample ID Date/Time Sampled Date Received 21100022-04 AG79977/WW-10 Centrifuge Cake 09/29/2021 0:00 10/1/2021 Date/Time Data Parameter Method Result Units PQL Analyst Analyzed Flag Aluminum EPA 6010 320 mg/Kg 19 KK 10/14/2021 11:01 Antimony EPA 6020 <4 mg/Kg 4 JF 10/08/2021 11:31 Arsenic EPA 6020 4 mg/Kg 4 JF 10/08/2021 11:31 Barium EPA 6020 74 mg/Kg 19 JF 10/08/2021 11:31 Beryllium EPA 6020 <4 mg/Kg 4 JF 10/08/2021 11:31 Cadmium EPA 6020 <4 mg/Kg 4 JF 10/08/2021 11:31 Calcium EPA 6010 3000 mg/Kg 190 KK 10/14/2021 11:01 Chromium EPA 6020 7 mg/Kg 4 JF 10/08/2021 11:31 Cobalt EPA 6020 <4 mg/Kg 4 JF 10/08/2021 11:31 Copper EPA 6020 250 mg/Kg 4 JF 10/08/2021 11:31 Iron EPA 6010 180 mg/Kg 19 KK 10/14/2021 11:01 Lead EPA 6020 4 mg/Kg 4 JF 10/08/2021 11:31 Magnesium EPA 6010 310 mg/Kg 190 KK 10/14/2021 11:01 Manganese EPA 6020 70 mg/Kg 4 JF 10/08/2021 11:31 Mercury SW-846 7471 B 0.33 mg/Kg 0.07 KK 10/15/2021 15:10 Molybdenum EPA 6020 11 mg/Kg 4 JF 10/08/2021 11:31 Nickel EPA 6020 7 mg/Kg 4 JF 10/08/2021 11:31 Potassium EPA 6010 290 mg/Kg 190 KK 10/14/2021 11:01 Selenium EPA 6020 < 19 mg/Kg 19 JF 10/08/2021 11:31 Silver EPA 6020 <4 mg/Kg 4 JF 10/08/2021 11:31 Sodium EPA 6010 < 190 mg/Kg 190 KK 10/14/2021 11:01 Thallium EPA 6020 < 1.9 mg/Kg 1.9 JF 10/08/2021 11:31 Vanadium EPA 6020 7 mg/Kg 4 JF 10/08/2021 11:31 Zinc EPA 6020 520 mg/Kg 40 JF 10/08/2021 11:31 Revision vl Page 5 of 19 Silver State Labs-Reno Quality Control Report SilverState 1135 Financial Blvd Analytical Laboratories Reno,NV 89502 WO#: 21100022 Sierra Environmental Monitoring (775)857-2400 FAX:(888)398-7002 10/20/2021 www.ssalabs.com Analysis: Metals 200.7 Method: EPA 200.7 Batch ID: R58816 Method Blank RunID: 58816 SegNo 1427638 Units: mg/L Analysis Date: 10/5/2021 12:56:13 PM Analyst: KK Analyte Result Rep Limit Rep Qual Aluminum <0.050 0.050 Calcium <0.50 0.50 Iron <0.050 0.050 Magnesium <0.50 0.50 Potassium I <0.501 0.50 Sodium I <0.501 0.50 Revision vl Page 6 of 19 Silver State Labs-Reno Quality Control Report SilverState 1135 Financial Blvd Analytical Laboratories Reno,NV 89502 WO#: 21100022 Sierra Environmental Monitoring (775)857-2400 FAX:(888)398-7002 10/20/2021 www.ssalabs.com Method Blank RunID: 58816 SegNo 1427639 Units: mg/L Analysis Date: 10/5/2021 12:58:22 PM Analyst: KK Analyte Result Rep Limit Rep Qual Aluminum <0.050 0.050 Calcium <0.50 0.50 Iron <0.050 0.050 Magnesium <0.50 0.50 Potassium I <0.501 0.50 Sodium 1 10.501 0.50 Laboratory Control Sample(LCS) RunID: 58816 SegNo 1427599 Units: mg/L Analysis Date: 10/5/2021 11:32:05 AM Analyst: KK Analyte LCS LCS Result LCS% LCSD LCSD LCSD% RPD RPD Low High Qual Spike Recovery Spike Result Recovery Limit Limit Limit Added Added Aluminum 6.000 5.9 98.8 Calcium 30.00 30 101 Iron 6.000 6.0 100 Magnesium 30.00 31 103 Potassium 30.00 30 101 Sodium 30.00 30 102 Matrix Spike(MS)/Matrix Spike Duplicate(MSD) Sample Spiked: 21091429-02C RunID: 58816 SegNo 1427571 Units: mg/L Analysis Date: 10/5/2021 1:06:58 PM Analyst: KK Analyte Sample MS MS MS% MSD MSD MSD% RPD RPD Low High Qual Result Spike Result Recovery Spike Result Recovery Limit Limit Limit Added Added Aluminum 0 5.000 4.9 97.3 5.000 4.9 98.8 1.59 20 70 130 Calcium 11.12 20.00 31 98.8 20.00 31 102 1.83 20 70 130 Iron 0 5.0001 4.9 98.21 5.000 5.01 99.5 1.39 201 70 130 Magnesium 1.801 20.00 23 105 20.00 23 107 1.54 20 70 130 Potassium 11.40 20.00 31 98.4 20.00 32 101 1.59 20 70 130 Sodium 19.57 20.00 41 105 20.00 41 109 1.69 20 70 130 Matrix Spike(MS)/Matrix Spike Duplicate(MSD) Sample Spiked: 21100030-04B RunID: 58816 SegNo 1427585 Units: mg/L Analysis Date: 10/5/2021 1:37:08 PM Analyst: KK Analyte Sample MS MS MS% MSD MSD MSD% RPD RPD Low High Qual Result Spike Result Recovery Spike Result Recovery Limit Limit Limit Added Added Aluminum 0 5.000 4.9 97.2 5.000 4.9 97.2 0.0169 20 70 130 Calcium 4.977 20.00 25 101 20.00 25 101 0.218 20 70 130 Iron 01 5.0001 5.01 99.1 5.000 5.01 99.61 0.4991 201 701 130 Revision vl Page 7 of 19 Silver State Labs-Reno Quality Control Report SilverState 1135 Financial Blvd Analytical Laboratories Reno,NV89502 WO#: 21100022 Sierra Environmental Monitoring (775)857-2400 FAX:(888)398-7002 10/20/2021 www.ssalabs.com Magnesium 1.788 20.00 23 107 20.00 23 107 0.527 20 70 130 Potassium 7.779 20.00 28 101 20.00 28 101 0.507 20 70 130 Sodium 19.941 20.00 421 109 20.00 421 110 0.5391 20 70 130 Analvsis: Metals 200.8 Method: EPA 200.8 Batch ID: R58855 Method Blank RunID: 58855 SegNo 1429895 Units: mg/L Analysis Date: 10/6/2021 1:47:33 AM Analyst: MC Analyte Result Rep Limit Rep Qual Antimony <0.0020 0.0020 Arsenic <0.0020 0.0020 Barium <0.010 0.010 Beryllium <0.0020 0.0020 Cadmium <0.0020 0.0020 Chromium <0.0020 0.0020 Cobalt <0.0020 0.0020 Copper <0.0020 0.0020 Lead <0.0020 0.0020 Manganese <0.0020 0.0020 Molybdenum <0.010 0.010 Nickel <0.0020 0.0020 Selenium <0.010 0.010 Silver <0.0020 0.0020 Thallium <0.0010 0.0010 Vanadium <0.0020 0.0020 Zinc <0.020 0.020 Revision vl Page 8 of 19 Silver State Labs-Reno Quality Control Report SilverState 1135 Financial Blvd Analytical Laboratories Reno,NV89502 WO#: 21100022 Sierra Environmental Monitoring (775)857-2400 FAX:(888)398-7002 10/20/2021 www.ssalabs.com Method Blank RunID: 58855 SegNo 1429897 Units: mg/L Analysis Date: 10/6/2021 1:53:27 AM Analyst: MC Analyte Result Rep Limit Rep Qual Antimony <0.0020 0.0020 Arsenic <0.0020 0.0020 Barium <0.010 0.010 Beryllium <0.0020 0.0020 Cadmium <0.0020 0.0020 Chromium <0.0020 0.0020 Cobalt <0.0020 0.0020 Copper <0.0020 0.0020 Lead <0.0020 0.0020 Manganese <0.0020 0.0020 Molybdenum <0.010 0.010 Nickel <0.0020 0.0020 Selenium <0.010 0.010 Silver <0.0020 0.0020 Thallium <0.0010 0.0010 Vanadium <0.0020 0.0020 Zinc <0.020 0.020 Laboratory Control Sample(LCS) RunID: 58855 SegNo 1429875 Units: mg/L Analysis Date: 10/6/2021 1:00:18 AM Analyst: MC Analyte LCS LCS Result LCS% LCSD LCSD LCSD% RPD RPD Low High Qual Spike Recovery Spike Result Recovery Limit Limit Limit Added Added Antimony 0.1000 0.098 98.4 Arsenic 0.1000 0.10 100 Barium 0.1000 0.10 100 Beryllium 0.1000 0.099 99.1 Cadmium 0.1000 0.10 104 Chromium 0.1000 0.099 99.2 Cobalt 0.1000 0.098 98.0 Copper 0.1000 0.10 99.8 Lead 0.1000 0.10 102 Manganese 0.1000 0.10 101 Molybdenum 0.1000 0.10 101 Nickel 0.1000 0.10 101 Selenium 0.5000 0.51 101 Silver 0.1000 0.099 99.4 Thallium 0.1000 0.10 102 Vanadium 0.1000 0.10 103 Zinc 0.1000 0.11 105 Matrix Spike(MS)/Matrix Spike Duplicate(MSD) Sample Spiked: 21091429-02C RunID: 58855 SegNo 1429916 Units: mg/L Revision vl Page 9 of 19 Silver State Labs-Reno Quality Control Report SilverState 1135 Financial Blvd Analytical Laboratories Reno,NV89502 WO#: 21100022 Sierra Environmental Monitoring (775)857-2400 FAX:(888)398-7002 10/20/2021 www.ssalabs.com Analysis Date: 10/6/2021 2:34:48 AM Analyst: MC Analyte Sample MS MS MS% MSD MSD MSD% RPD RPD Low High Qual Result Spike Result Recovery Spike Result Recovery Limit Limit Limit Added Added Antimony 0 1.000 1.1 107 1.000 1.1 107 0.261 20 70 130 Arsenic .004367 1.000 1.0 100 1.000 1.0 99.7 0.746 20 70 130 Barium .006180 1.0001 1.0 1021 1.000 1.01 100 1.73 201 70 130 Beryllium 0 1.000 1.0 103 1.000 0.98 97.8 4.83 20 70 130 Cadmium 0 1.000 1.0 100 1.000 1.0 102 1.80 20 70 130 Chromium 0 1.000 1.0 101 1.000 0.96 96.3 4.49 20 70 130 Cobalt 0 1.000 0.99 99.3 1.000 0.95 95.4 4.08 20 70 130 Copper 0 1.000 1.0 101 1.000 0.98 98.2 3.07 20 70 130 Lead 0 1.000 1.0 101 1.000 1.0 102 1.29 20 70 130 Manganese .006315 1.000 1.0 100 1.000 0.97 96.8 3.44 20 70 130 Molybdenum .003605 1.000 1.0 101 1.000 1.0 102 1.53 20 70 130 Nickel .002406 1.000 1.0 101 1.000 0.99 98.8 2.09 20 70 130 Selenium 0 5.000 4.7 93.2 5.000 4.6 92.8 0.452 20 70 130 Silver 0 0.1000 0.10 100 0.1000 0.10 99.7 0.532 20 70 130 Thallium 0 1.000 1.0 100 1.000 1.0 100 0.101 20 70 130 Vanadium 0 1.000 1.0 104 1.000 1.1 107 2.23 20 70 130 Zinc 1 01 1.000 0.941 93.6 1.000 0.91 91.01 2.811 20 701 130 Analvsis: Mercury Method: EPA 245.1 Batch ID: R58943 Method Blank RunID: 58943 SegNo 1432767 Units: mg/L Analysis Date: 10/7/2021 4:35:26 PM Analyst: KK Analyte I Result I Rep Limit I Rep Qual Mercury 1 '0.00011 0.0001 Laboratory Control Sample(LCS) RunlD: 58943 SegNo 1432766 Units: mg/L Analysis Date: 10/7/2021 4:35:26 PM Analyst: KK Analyte LCS LCS Result LCS% LCSD LCSD LCSD% RPD RPD Low High Qual Spike Recovery Spike Result Recovery Limit Limit Limit Added Added Mercury 0.0060001 0.00601 100 Matrix Spike(MS)/Matrix Spike Duplicate(MSD) Sample Spiked: 21091121-01C RunlD: 58943 SegNo 1432770 Units: mg/L Analysis Date: 10/7/2021 4:35:26 PM Analyst: KK Analyte Sample MS MS MS% MSD MSD MSD% RPD RPD Low High Qual Result Spike Result Recovery Spike Result Recovery Limit Limit Limit Added Added Mercury 0 005000 .00561 112 005000 D.005181 104 7.971 20 701 130 Revision vl Page 10 of 19 Silver State Labs-Reno Quality Control Report SilverState 1135 Financial Blvd Analytical Laboratories Reno,NV89502 WO#: 21100022 Sierra Environmental Monitoring (775)857-2400 FAX:(888)398-7002 10/20/2021 www.ssalabs.com Analysis: Metals 6020 Solid Method: EPA 6020 Batch ID: R59008 Method Blank RunlD: 59008 SegNo 1434686 Units: mg/Kg Analysis Date: 10/8/2021 7:18:04 PM Analyst: KL Analyte Result Rep Limit Rep Qual Antimony <0.010 0.010 Arsenic <0.010 0.010 Barium <0.050 0.050 Beryllium <0.010 0.010 Cadmium <0.010 0.010 Chromium <0.010 0.010 Cobalt <0.010 0.010 Copper 0.010 0.010 B Lead <0.010 0.010 Manganese 0.012 0.010 B Molybdenum <0.050 0.050 Nickel <0.010 0.010 Selenium <0.050 0.050 Silver <0.010 0.010 Thallium <0.0050 0.0050 Vanadium <0.010 0.010 Zinc <0.10 0.10 Revision vl Page 11 of 19 Silver State Labs-Reno Quality Control Report SilverState 1135 Financial Blvd Analytical Laboratories Reno,NV89502 WO#: 21100022 Sierra Environmental Monitoring (775)857-2400 FAX:(888)398-7002 10/20/2021 www.ssalabs.com Method Blank RunID: 59008 SegNo 1434687 Units: mg/Kg Analysis Date: 10/8/2021 7:23:59 PM Analyst: KL Analyte Result Rep Limit Rep Qual Antimony <0.010 0.010 Arsenic <0.010 0.010 Barium <0.050 0.050 Beryllium <0.010 0.010 Cadmium <0.010 0.010 Chromium <0.010 0.010 Cobalt <0.010 0.010 Copper <0.010 0.010 Lead <0.010 0.010 Manganese 0.011 0.010 B Molybdenum <0.050 0.050 Nickel <0.010 0.010 Selenium <0.050 0.050 Silver <0.010 0.010 Thallium <0.0050 0.0050 Vanadium <0.010 0.010 Zinc <0.10 0.10 Laboratory Control Sample(LCS) RunID: 59008 SegNo 1434625 Units: mg/L Analysis Date: 10/8/2021 12:32:31 PM Analyst: KL Analyte LCS LCS Result LCS% LCSD LCSD LCSD% RPD RPD Low High Qual Spike Recovery Spike Result Recovery Limit Limit Limit Added Added Antimony 0.1000 0.10 100 Arsenic 0.1000 0.10 102 Barium 0.1000 0.10 102 Beryllium 0.1000 0.10 101 Cadmium 0.1000 0.10 102 Chromium 0.1000 0.11 106 Cobalt 0.1000 0.10 101 Copper 0.1000 0.10 103 Lead 0.1000 0.10 104 Manganese 0.1000 0.10 105 Molybdenum 0.1000 0.10 102 Nickel 0.1000 0.11 105 Selenium 0.5000 0.51 102 Silver 0.1000 0.097 96.9 Thallium 0.1000 0.10 99.8 Vanadium 0.1000 0.10 100 Zinc 0.1000 0.11 109 Revision vl Page 12 of 19 Silver State Labs-Reno Quality Control Report SilverState 1135 Financial Blvd Analytical Laboratories Reno,NV89502 WO#: 21100022 Sierra Environmental Monitoring (775)857-2400 FAX:(888)398-7002 10/20/2021 www.ssalabs.com Laboratory Control Sample(LCS) RunID: 59008 SegNo 1434669 Units: mg/L Analysis Date: 10/8/2021 5:37:39 PM Analyst: KL Analyte LCS LCS Result LCS% LCSD LCSD LCSD% RPD RPD Low High Qual Spike Recovery Spike Result Recovery Limit Limit Limit Added Added Antimony 0.1000 0.096 96.5 Arsenic 0.1000 0.10 103 Barium 0.1000 0.10 101 Beryllium 0.1000 0.10 103 Cadmium 0.1000 0.096 96.2 Chromium 0.1000 0.10 100 Cobalt 0.1000 0.10 101 Copper 0.1000 0.10 100 Lead 0.1000 0.099 99.4 Manganese 0.1000 0.10 100 Molybdenum 0.1000 0.096 96.0 Nickel 0.1000 0.099 98.6 Selenium 0.5000 0.50 99.7 Silver 0.1000 0.096 96.1 Thallium 0.1000 0.099 98.7 Vanadium 0.1000 0.10 99.6 Zinc 0.1000 0.11 109 Matrix Spike(MS)/Matrix Spike Duplicate(MSD) Sample Spiked: 21100343-01A RunID: 59008 SegNo 1434692 Units: mg/Kg Analysis Date: 10/8/2021 7:53:29 PM Analyst: KL Analyte Sample MS MS MS% MSD MSD MSD% RPD RPD Low High Qual Result Spike Result Recovery Spike Result Recovery Limit Limit Limit Added Added Antimony 0.1280 100.0 57 57.1 100.0 56 56.1 1.74 20 70 130 S Arsenic 20.74 100.0 120 96.2 100.0 120 95.3 0.710 20 70 130 Barium 77.92 100.01 170 96.61 100.0 1701 94.9 0.973 201 70 130 Beryllium 0.1131 100.0 110 110 100.0 110 106 3.77 20 70 130 Cadmium 0.8404 100.0 95 94.0 100.0 92 91.6 2.54 20 70 130 Chromium 4.664 100.0 99 94.1 100.0 100 95.3 1.15 20 70 130 Cobalt 1.243 100.0 97 95.8 100.0 96 94.9 0.869 20 70 130 Copper 31.92 100.0 130 93.8 100.0 120 92.2 1.30 20 70 130 Lead 1.566 100.0 95 93.7 100.0 97 95.5 1.84 20 70 130 Manganese 186.2 100.0 280 88.9 100.0 280 93.4 1.62 20 70 130 Molybdenum 3.769 100.0 98 94.1 100.0 99 95.1 1.03 20 70 130 Nickel 2.772 100.0 97 94.1 100.0 97 94.5 0.474 20 70 130 Selenium 0 500.0 470 93.9 500.0 470 93.8 0.0738 20 70 130 Silver 0.2776 10.00 10 96.9 10.00 9.9 96.2 0.710 20 70 130 Thallium 0.05152 100.0 93 92.8 100.0 94 93.5 0.671 20 70 130 Vanadium 4.992 100.0 99 94.2 100.0 99 94.1 0.0974 20 70 130 Zinc 1 101.71 100.0 1901 88.1 100.0 190 89.61 0.7691 20 701 130 Revision vl Page 13 of 19 Silver State Labs-Reno Quality Control Report SilverState 1135 Financial Blvd Analytical Laboratories Reno,NV 89502 WO#: 21100022 Sierra Environmental Monitoring (775)857-2400 FAX:(888)398-7002 10/20/2021 www.ssalabs.com Analysis: Metals 6010-Solid Method: EPA 6010 Batch ID: R59161 Method Blank RunID: 59161 SegNo 1438520 Units: mg/Kg Analysis Date: 10/14/2021 2:21:19 PM Analyst: KK Analyte Result Rep Limit Rep Qual Aluminum <0.050 0.050 Calcium <0.50 0.50 Iron <0.050 0.050 B Magnesium <0.50 0.50 Potassium I <0.501 0.50 Sodium I <0.501 0.50 Revision vl Page 14 of 19 Silver State Labs-Reno Quality Control Report SilverState 1135 Financial Blvd Analytical Laboratories Reno,NV 89502 WO#: 21100022 Sierra Environmental Monitoring (775)857-2400 FAX:(888)398-7002 10/20/2021 www.ssalabs.com Method Blank RunID: 59161 SegNo 1438521 Units: mg/Kg Analysis Date: 10/14/2021 2:23:28 PM Analyst: KK Analyte Result Rep Limit Rep Qual Aluminum <0.050 0.050 B Calcium <0.50 0.50 Iron <0.050 0.050 B Magnesium <0.50 0.50 Potassium I <0.501 0.50 Sodium 1 10.501 0.50 Laboratory Control Sample(LCS) RunID: 59161 SegNo 1438500 Units: mg/L Analysis Date: 10/14/2021 11:24:57 AM Analyst: KK Analyte LCS LCS Result LCS% LCSD LCSD LCSD% RPD RPD Low High Qual Spike Recovery Spike Result Recovery Limit Limit Limit Added Added Aluminum 6.000 5.9 98.7 Calcium 30.00 31 102 Iron 6.000 6.1 102 Magnesium 30.00 30 101 Potassium 30.00 30 98.4 Sodium 30.00 30 99.9 Analvsis: Mercury,RCRA Solid Method: SW-846 7471B Batch ID: R59203 Method Blank RunID: 59203 SegNo 1439255 Units: mg/Kg Analysis Date: 10/15/2021 3:10:55 PM Analyst: KK Analyte I Result I Rep Limit I Rep Qual Mercury 1 '0.000101 0.00010 Laboratory Control Sample(LCS) RunID: 59203 SegNo 1439254 Units: mg/Kg Analysis Date: 10/15/2021 3:10:55 PM Analyst: KK Analyte LCS LCS Result LCS% LCSD LCSD LCSD% RPD RPD Low High Qual Spike Recovery Spike Result Recovery Limit Limit Limit Added Added Mercury 0.0060001 0.0063 105 Matrix Spike(MS)/Matrix Spike Duplicate(MSD) Sample Spiked: 21100462-01A RunID: 59203 SegNo 1439261 Units: mg/Kg Analysis Date: 10/15/2021 3:10:55 PM Analyst: KK Analyte Sample MS MS MS% MSD MSD MSD% RPD RPD Low High Qual Result Spike Result Recovery Spike Result Recovery Limit Limit Limit Added Added Revision vl Page 15 of 19 Silver State Labs-Reno Quality Control Report SilverState 1135 Financial Blvd Analytical Laboratories Reno,NV89502 WO#: 21100022 •Sierra Environmental Monitoring (775)857-2400 FAX:(888)398-7002 10/20/2021 www.ssalabs.com Mercury 1 0.45901 1.0591 1.61 1051 1.0961 1.71 1161 9.701 201 701 130 Revision vl Page 16 of 19 SOUT H TAHOE PUBLIC UTILITY DISTRICT '2C IV&r CHAIN OF CUSTODY South Tahoe Public Utility district » utN .. Lab Sent to: Turnaround T oe 1275 Meadow Crest DriveA. South Lake Tahoe, CA 96150 " Sampler: a Standard Phone: (530)-543-6231 '""say'" p t 24 Hr FAX: 530 -541-4296 �-- s �— 48 Hr m c a j ca Other f 0 p V G c7 ✓1 :� FQt� � 1 � 1 � � S LV r 1t3[ttt�Qft �. U : .: :.::::...............:.:.:.r:r:; ;:;::.:::,:.:..................................... ........... c O ... ._::�:.�.:�:.: .;it•�.�.::�::•.�•:.::...:..:....,...............:::..::.:...:. � s;::<:::;•, <r::n:a:::;6:;lis5i.'�':= Comments: Relinquished by: Received by: Report MTBE to 0.5 jig/L. Note any detection of MTBE z 0.2 µWL .� - ❑ Analyze Travel and Field Blanks only if VOCs detected in samples. Signature a/tj') Signature ❑ Use Calif State Write-On form to report results of Potable Water Wells Print V' Print rj,4 �3 �c� a Company South Tahoe Public LRili District Company Please Return all STPUD ice the Date: Time z Date: Time tikt3r33 Relinquished by: Received by: 1� `P Received intact Signature Signatures L Received cold Print Print -� Custody seals Company Company Date: Time Date: Time Correct container SLabTormsZhain of custody.doc Page of 1950 �e�et Wade` outTahoe Public Utility Di5trict 1275 Meadow Crest Drive•South Lake Tahoe•CA 96150-7401 Phone 530 544-6474•Fax 550 541-0614•wwwsGpud.us Thursday, September 30, 2021 Silver State Analytical Laboratories 1135 Financial Blvd Reno, NV 89502 Dear Lab Please analyze all three samples for the following metals: Aluminum Cobalt Nickel Antimony Copper Potassium Arsenic Iron Selenium Barium Lead Silver Beryllium Magnesium Sodium Cadmium Manganese Thallium Calcium Mercury Vanadium Chromium Molybdenum Zinc The centrifuge cake sample is to be tested for California's TTLC or Wastewater EPA Priority Pollutant metals. Please use the lowest detection limits possible and use the methods appropriate for metals analysis for compliance with wastewater regulations. Report results as both wet weight and dry weight for the Centrifuge Cake sample For the Centrifuge Cake sample, run the STLC for any metal whose result for the TTLC is ? 10 X STLC. Please return the ice chest and ice packs. Thank y u. J ct/u Dan Arce Laboratory Director DALab%FannslPriority_Pollutants-Centrifuge_CakelPriorityPollutantMetals-SEM.doc Page 18 of 19 Silver State Labs-Reno Definitions & Qualifiers S i Ive r Sta to 1135 Financial Blvd s Analytical Laboratories Reno,Nv89so2 wo#: 21100022 •Sierra Environmental Monitoring (775)857-2400 FAX:(888)398-7002 Date: 10/20/2021 www.ssalabs.com Definitions: LCS: Laboratory Control Sample;prepared by adding a known mass of target analytes to a specified amount of de-ionized water and prepared with the batch of samples,used to calculate Accuracy(%REC). LCSD: LCS Duplicate;used to calculate both Accuracy(%REC)and Precision(%RPD) MBLK:Method Blank;a sample of similar matrix that is processed simultaneously with and under the same conditions as samples through all steps of the analytical procedure,and in which no target analytes or interferences are present at concentrations that impact the analytical results for sample analyses. MS:Matrix Spike;prepared by adding a known mass of target analytes to a specified amount of matrix sample for which an independent estimate of target analyte concentration is available,used to calculate Accuracy(%REC) MSD:Matrix Spike Duplicate;used to calculate both Accuracy(%REC)and Precision(%RPD) RPD:Relative Percent Difference;comparison between sample and duplicate and/or MS and MSD. PQL:Practical Quantitation Limit;the limit to which data is quantitated for reporting. MDL:Method Detection Limit;the limit to which the instrument can reliably detect. MCL:Maximum Contaminant Level;value set according to EPA guidelines. Qualifiers: *-Analyte exceeds Safe Drinking Water Act MCL,does not meet drinking water standards. C-Analyte value below Safe Drinking Water Act MCL,does not meet drinking water standards. B-Analyte found above the PQL in associated method blank. G-Calibration blank analyte detected above PQL. H-Sample analyzed beyond holding time for this parameter. J-Estimated Value;Analyte found between MDL and PQL limits. L-Sample concentration is at least 5 times greater than spike contribution. Spike recovery criteria do not apply. R-RPD between sample and duplicate sample outside the RPD acceptance limits. S-Batch MS and/or MSD were outside acceptance limits,batch LCS was acceptable. W-Sample temperature when recieved was out of limit as specified by method. Z-Batch LCS and/or LCSD were outside acceptance limits. Revision vl Page 19 of 19 E1'1VIR0riMEriTAJL!W. . , Analytical Chemists November 2, 2021 South Tahoe Public Utility District Lab ID : SP 2113807 1275 Meadow Crest Drive Customer 2-11369 South Lake Tahoe, CA 96150 Laboratory Report Introduction: This report package contains total of 29 pages divided into 3 sections: Case Narrative (2 pages) : An overview of the work performed at FGL. Sample Results (12 pages) : Results for each sample submitted. Quality Control (15 pages) : Supporting Quality Control (QC)results. Case Narrative This Case Narrative pertains to the following samples: Sample Description Date Sampled R Dat ed FGL Lab ID # Matrix WW-06 Raw Grab 09/29/2021 10/01/2021 SP 2113807-001 WW WW-05 Final Grab 09/29/2021 10/01/2021 SP 2113807-002 WW WW-01 Raw Influent 09/29/2021 10/01/2021 SP 2113807-003 WW WW-04 Final Effluent 09/29/2021 10/01/2021 SP 2113807-00i__L WW Sampling and Receipt Information: All samples were received in acceptable condition and within temperature requirements, unless noted on the Condition Upon Receipt(CUR) form. All samples arrived at 3 'C. All samples were prepared and analyzed within the method specified hold time. All samples were checked for pH if acid or base preservation is required(except for VOAs). For details of sample receipt information, please see the attached Chain of Custody and Condition Upon Receipt Form. Quality Control: All samples were prepared and analyzed according to the following tables: Organic QC 5030B 10/11/2021:212110 All preparation quality controls are within established criteria(performed at FGL-SP ELAN 1573). 10/04/2021:211466 All preparation quality controls are within established criteria(performed at FGL-SP ELAP# 1573),except: The following note applies to Endrin,Tetrachloro-m-xylene: 608.3 410 Relative Percent Difference(RPD)not within Maximum Allowable Value(MAV).Data was accepted based on the LCS or CCV recovery. The following note applies to Endrin Ketone: 310 LCS above Acceptance Range(AR). Samples which were non detect for this analyte were accepted. 10/21/2021:216429 All analysis quality controls are within established criteria,except: 608/8081 The following note applies to Endosulfan II: 360 CCV above Acceptance Range(AR). Samples which were non detect for this analyte were acccptcd. Page 1 of 29 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 November 2, 2021 Lab ID : SP 2113807 South Tahoe Public Utility District Customer : 2-11369 Organic QC 10/22/2021:216429 All analysis quality controls are within established criteria,except: 608/8081 The following note applies to Endosulfan II: 360 CCV above Acceptance Range(AR). Samples which were non detect for this analyte were accepted. 10/21/2021:216871 All analysis quality controls are within established criteria. 10/22/2021:216871 All analysis quality controls are within established criteria. 10/07/2021:215662 All analysis quality controls are within established criteria,except: 625.1 The following note applies to 2-Fluorophenol,2,4,6-Tribromophenol: 362 Surrogates are qualified on Control Chart Limits,these are CCV limits. See individual sample reports. 10/04/2021:211465 All preparation quality controls are within established criteria(performed at FGL-SP ELAN 1573),except: The following note applies to Benzidine: 436 Blank Spike(BS)not within Acceptance Range(AR).Data was accepted based on the LCS or CCV recovery. The following note applies to Benzidine: 410 Relative Percent Difference(RPD)not within Maximum Allowable Value(MAV).Data was accepted based on the LCS or CCV recovery. 10/11/2021:216242 All analysis quality controls are within established criteria,except: The following note applies to 1,2,4-Trimethylbenzene, 1,3,5-Trimethylbenzene,2,2-Dichloropropane,2- Chlorotoluene,2-Hexanone,Acetone,Acrylonitrile: 8260B 360 CCV above Acceptance Range(AR). Samples which were non detect for this analyte were accepted. The following note applies to 1,2,4-Trimethylbenzene, 1,3,5-Trimethylbenzene,2,2-Dichloropropane,2- Chlorotoluene,2-Hexanone,Acetone,Acrylonitrile: 380 CCV met CCC and SPCC criteria,Results were reported. Certification:: I certify that this data package is in compliance with ELAP standards,both technically and for completeness, except for any conditions listed above. Release of the data contained in this data package is authorized by the Laboratory Director or his designee, as verified by the following electronic signature. KD:MKH Digitally signed by David Tea,B.A.,M.B.A. Approved By David Terz,B.A.,M.B.A. Title:QA Dire. Date:2021-11-02 Page 2 of 29 EI'IVIR0riMEriTAJL!W. . , Analytical Chemists November 2, 2021 Lab ID : SP 2113807-001 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : September 29, 2021-11:38 South Lake Tahoe, CA 96150 Sampled By : OPS/LDA/KV Received On : October 1, 2021-11:53 Matrix : Waste Water Description : WW-06 Raw Grab Project : AG79963 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 4-Bromofluorobenzene* 120 78-125 % 5030B 10/11/21:212110 8260B 10/11/21:216242 Dibromofluoromethane$ 101 85-124 % 5030B 10/11/21:212110 8260B 10/11/21:216242 1,2-Dichloroethane-d4$ 106 84-126 % 5030B 10/11/21:212110 8260B 10/11/21:216242 Toluene-d8$ 104 77-129 % 5030B 10/11/21:212110 8260B 10/11/21:216242 Acetone 60 50 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Acrolein ND 50 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Acrylonitrile ND 50 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Benzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Bromobenzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Bromochloromethane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Bromodichloromethane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Bromoform ND 2 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Bromomethane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 tert-Butanol ND 5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 2-Butanone(MEK) ND 10 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 n-Butylbenzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 sec-Butylbenzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 tert-Butylbenzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Carbon Disulfide ND 10 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Carbon Tetrachloride ND 1 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Chlorobenzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Chloroethane ND 1 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Chloroform ND 1 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Chloromethane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 2-Chlorotoluene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 4-Chlorotoluene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Dibromochloromethane ND 2 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Dibromomethane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,2-Dichlorobenzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,3-Dichlorobenzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,4-Dichlorobenzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Dichlorodifluoromethane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,1-Dichloroethane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,2-Dichloroethane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,1-Dichloroethylene I ND 1 0.5 1 ug/L I I 5030B 10/11/21:212110 8260B 10/11/21:216242 Page 3 of 29 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 November 2, 2021 Lab ID : SP 2113807-001 Description : WW-06 Raw Grab Customer ID 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 cis-1,2-Dichloroethylene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 trans-1,2-Dichloroethylene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,2-Dichloropropane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,3-Dichloropropane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 2,2-Dichloropropane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,1-Dichloropropene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,3-Dichloropropene(Total) ND -- ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 cis-1,3-Dichloropropene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 trans-1,3-Dichloropropene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Di-isopropyl ether(DIPS) ND 5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Ethyl Benzene 0.6 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Ethyl tert-butyl ether ND 2 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 (ETBE) Hexachlorobutadiene ND 5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 2-Hexanone ND 10 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Isopropylbenzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 p-Isopropyltoluene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Methyl tert-butyl ether ND 2 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 (MTBE) 4-Methyl-2-pentanone ND 10 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 (MIBK) Methylene Chloride ND 5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Naphthalene ND 10 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 n-Propylbenzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Styrene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 tert-Amyl methyl ether (TAME) ND 5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,1,1,2-Tetrachloroethane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,1,2,2-Tetrachloroethane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Tetrachloroethylene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Toluene 3.8 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,2,3-Trichlorobenzene ND 10 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,2,4-Trichlorobenzene ND 10 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,1,1-Trichloroethane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,1,2-Trichloroethane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Trichloroethylene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Trichlorofluoromethane ND 1 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,2,4-Trimethylbenzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,3,5-Trimethylbenzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Vinyl Acetate ND 10 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Vinyl Chloride ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Xylenes I ND -- ug/L 5030B 10/11/21:212110 1 8260B 10/11/21:21624 Page 4 of 29 November 2, 2021 Lab ID : SP 2113807-001 Description : WW-06 Raw Grab Customer ID 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 Xylenes m,p ND 2 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Xylenes o ND 2 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 ND=Non-Detected.PQL=Practical Quantitation Limit.$Surrogate.*PQL adjusted for dilution. Page 5 of 29 EI'IVIR0riMEriTAJL!W. . , Analytical Chemists November 2, 2021 Lab ID : SP 2113807-002 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : September 29, 2021-11:56 South Lake Tahoe, CA 96150 Sampled By : OPS/LDA/KV Received On : October 1, 2021-11:53 Matrix : Waste Water Description : WW-05 Final Grab Project : AG79964 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 4-Bromofluorobenzene* 113 78-125 % 5030B 10/11/21:212110 8260B 10/11/21:216242 Dibromofluoromethane$ 108 85-124 % 5030B 10/11/21:212110 8260B 10/11/21:216242 1,2-Dichloroethane-d4$ 109 84-126 % 5030B 10/11/21:212110 8260B 10/11/21:216242 Toluene-d8$ 102 77-129 % 5030B 10/11/21:212110 8260B 10/11/21:216242 Acetone ND 50 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Acrolein ND 50 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Acrylonitrile ND 50 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Benzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Bromobenzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Bromochloromethane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Bromodichloromethane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Bromoform ND 2 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Bromomethane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 tert-Butanol ND 5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 2-Butanone(MEK) ND 10 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 n-Butylbenzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 sec-Butylbenzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 tert-Butylbenzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Carbon Disulfide ND 10 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Carbon Tetrachloride ND 1 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Chlorobenzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Chloroethane ND 1 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Chloroform 1 1 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Chloromethane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 2-Chlorotoluene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 4-Chlorotoluene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Dibromochloromethane ND 2 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Dibromomethane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,2-Dichlorobenzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,3-Dichlorobenzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,4-Dichlorobenzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Dichlorodifluoromethane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,1-Dichloroethane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,2-Dichloroethane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,1-Dichloroethylene I ND 1 0.5 1 ug/L I I 5030B 10/11/21:212110 8260B 10/11/21:216242 Page 6 of 29 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 November 2, 2021 Lab ID : SP 2113807-002 Description : WW-05 Final Grab Customer ID 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 cis-1,2-Dichloroethylene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 trans-1,2-Dichloroethylene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,2-Dichloropropane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,3-Dichloropropane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 2,2-Dichloropropane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,1-Dichloropropene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,3-Dichloropropene(Total) ND -- ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 cis-1,3-Dichloropropene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 trans-1,3-Dichloropropene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Di-isopropyl ether(DIPS) ND 5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Ethyl Benzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Ethyl tert-butyl ether ND 2 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 (ETBE) Hexachlorobutadiene ND 5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 2-Hexanone ND 10 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Isopropylbenzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 p-Isopropyltoluene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Methyl tert-butyl ether ND 2 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 (MTBE) 4-Methyl-2-pentanone ND 10 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 (MIBK) Methylene Chloride ND 5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Naphthalene ND 10 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 n-Propylbenzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Styrene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 tert-Amyl methyl ether (TAME) ND 5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,1,1,2-Tetrachloroethane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,1,2,2-Tetrachloroethane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Tetrachloroethylene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Toluene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,2,3-Trichlorobenzene ND 10 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,2,4-Trichlorobenzene ND 10 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,1,1-Trichloroethane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,1,2-Trichloroethane ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Trichloroethylene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Trichlorofluoromethane ND 1 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,2,4-Trimethylbenzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 1,3,5-Trimethylbenzene ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Vinyl Acetate ND 10 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Vinyl Chloride ND 0.5 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Xylenes I ND -- ug/L 5030B 10/11/21:212110 1 8260B 10/11/21:21624 Page 7 of 29 November 2, 2021 Lab ID : SP 2113807-002 Description : WW-05 Final Grab Customer ID 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 Xylenes m,p ND 2 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 Xylenes o ND 2 ug/L 5030B 10/11/21:212110 8260B 10/11/21:216242 ND=Non-Detected.PQL=Practical Quantitation Limit.$Surrogate.*PQL adjusted for dilution. Page 8 of 29 E1'1VIR0riMEriTAJL!W. . , Analytical Chemists November 2, 2021 Lab ID : SP 2113807-003 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : September 29, 2021-00:00 South Lake Tahoe, CA 96150 Sampled By : OPS/LDA/KV Received On : October 1, 2021-11:53 Matrix : Waste Water Description : WW-01 Raw Influent Project : AG79973 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 608.3 Tetrachloro-m-X lene$ 6.0 5-124 % 608.3 10/04/21:211466 608/8081 10/22/21:216429 Aldrin ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 Alpha BHC ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 Beta BHC ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 Delta BHC ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 Gamma BHC(Lindane) ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 Chlordane ND 0.1 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 4,4-DDD ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 4,4-DDE ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 4,4-DDT ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216871 Dieldrin ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 Endosulfan I ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 Endosulfan II ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 Endosulfan Sulfate ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 Endrin ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 Endrin Aldehyde ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 Heptachlor ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 Heptachlor Epoxide ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 Methoxychlor ND 0.1 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216871 Toxaphene ND 0.5 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 PCB, Sum ND -- ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 PCB 1016 ND 0.5 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 PCB 1221 ND 0.5 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 PCB 1232 ND 0.5 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 PCB 1242 ND 0.5 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 PCB 1248 ND 0.5 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 PCB 1254 ND 0.5 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 PCB 1260 ND 0.5 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 Endrin Ketone I ND 1 0.05 1 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 EPA 625.1 2-Fluorobiphenyl$ 44.3 20-97* % 625.1 10/04/21:211465 625.1 10/07/21:215662 2-Fluorophenol$ 14.7 5-95* % 625.1 10/04/21:211465 625.1 10/07/21:215662 Nitrobenzene-d5$ 80.8 15-314* % 625.1 10/04/21:211465 625.1 10/07/21:215662 Phenol-d6$ 34.3 8-424* % 625.1 10/04/21:211465 625.1 10/07/21:215662 p-Terphenyl-dl4$ 41.9 18-106* 1 % 625.1 10/04/21:211465 625.1 10/07/21:215662 Page 9 of 29 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 November 2, 2021 Lab ID : SP 2113807-003 Description : WW-01 Raw Influent Customer ID 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 625.1 2,4,6-Tribromophenol$ 48.4 5-118* % 625.1 10/04/21:211465 625.1 10/07/21:215662 Acenaphthene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Acenaphthylene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Anthracene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Benzidine ND l l* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Benzo(a)anthracene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Benzo(a)pyrene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Benzo(b)fluoranthene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Benzo(g,h,i)perylene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Benzo(b)fluoranthene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 bls(2- ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Chloroethoxy)methane bis(2-Chloroethyl)ether ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 bis(2-Chloroisopropyl)ether ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 bis(2-Ethylhexyl)phthalate ND 28* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 4-Bromophenylphenylether ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Butylbenzylphthalate ND l l* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 4-Chloro-3-methylphenol ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 2-Chloronaphthalene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 2-Chlorophenol ND l l* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 4-Chlorophenylphenylether ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Chrysene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Dibenzo(a,h)anthracene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 1,2-Dichlorobenzene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 1,3-Dichlorobenzene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 1,4-Dichlorobenzene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 3,3'-Dichlorobenzidine ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 2,4-Dichlorophenol ND l l* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Diethylphthalate ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 2,4-Dimethylphenol ND l l* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Dimethylphthalate ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Di-n-butylphthalate ND l l* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 4,6-Dinitro-2- methylphenol ND 11 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 2,4-Dinitrophenol ND 28* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 2,4-Dinitrotoluene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 2,6-Dinitrotoluene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Di-n-octylphthalate ND 28* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 1,2-Diphenylhydrazine ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Fluoranthene I ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Page 10 of 29 November 2, 2021 Lab ID : SP 2113807-003 Description : WW-01 Raw Influent Customer ID 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 625.1 Fluorene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Hexachlorobenzene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Hexachlorobutadiene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Hexachlorocyclopentadiene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Hexachloroethane ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Indeno(1,2,3-c,d)pyrene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Isophorone ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Naphthalene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Nitrobenzene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 2-Nitrophenol ND l l* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 4-Nitrophenol ND l l* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 N-Nitrosodimethylamine ND l l* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 N-Nitrosodi-n-propylamine ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 N-Nitrosodiphenylamine ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Non-Chlorinated Phenolics ND -- ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Pentachlorophenol ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Phenanthrene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Phenol 15.3 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Pyrene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Pyridine ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 1,2,4-Trichlorobenzene ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 2,4,6-Trichlorophenol ND 5.7* ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 2,4,5-Trichlorophenol I ND I l l* I ug/L 1 625.1 10/04/21:211465 625.1 10/07/21:215662 ND=Non-Detected.PQL=Practical Quantitation Limit.$Surrogate.*PQL adjusted for dilution. Page 11 of 29 EI'IVIR0riMEriTAJL!W. . , Analytical Chemists November 2, 2021 Lab ID : SP 2113807-004 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : September 29, 2021-00:00 South Lake Tahoe, CA 96150 Sampled By : OPS/LDA/KV Received On : October 1, 2021-11:53 Matrix : Waste Water Description : WW-04 Final Effluent Project : AG79976 Sample Result- Organic Constituent Result PQL Units Note [ Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 608.3 Tetrachloro-m-X lene$ 34.2 5-124 % 608.3 10/04/21:211466 608/8081 10/21/21:216429 Aldrin ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 Alpha BHC 0.05 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 Beta BHC ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 Delta BHC ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 Gamma BHC(Lindane) ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 Chlordane ND 0.1 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 4,4-DDD ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 4,4-DDE ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 4,4-DDT ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216871 Dieldrin ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 Endosulfan I ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 Endosulfan II ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 Endosulfan Sulfate ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 Endrin ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 Endrin Aldehyde ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 Heptachlor ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 Heptachlor Epoxide ND 0.05 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 Methoxychlor ND 0.1 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216871 Toxaphene ND 0.5 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 PCB, Sum ND -- ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 PCB 1016 ND 0.5 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 PCB 1221 ND 0.5 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 PCB 1232 ND 0.5 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 PCB 1242 ND 0.5 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 PCB 1248 ND 0.5 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 PCB 1254 ND 0.5 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 PCB 1260 ND 0.5 ug/L 608.3 10/04/21:211466 608/8081 10/22/21:216429 Endrin Ketone I ND 1 0.05 1 ug/L 608.3 10/04/21:211466 608/8081 10/21/21:216429 EPA 625.1 2-Fluorobiphenyl$ 56.0 20-97 % 625.1 10/04/21:211465 625.1 10/07/21:215662 2-Fluorophenol$ 76.0 5-95 % 625.1 10/04/21:211465 625.1 10/07/21:215662 Nitrobenzene-d5$ 70.6 15-314 % 625.1 10/04/21:211465 625.1 10/07/21:215662 Phenol-d6$ 84.7 8-424 % 625.1 10/04/21:211465 625.1 10/07/21:215662 p-Terphenyl-dl4$ 48.1 1 18-106 1 % 625.1 10/04/21:211465 625.1 10/07/21:215662 Page 12 of 29 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 November 2, 2021 Lab ID : SP 2113807-004 Description : WW-04 Final Effluent Customer ID 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 625.1 2,4,6-Tribromophenol$ 93.0 5-1 1 H % 625.1 10/04/21:211465 625.1 10/07/21:215662 Acenaphthene ND I ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Acenaphthylene ND I ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Anthracene ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Benzidine ND 2 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Benzo(a)anthracene ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Benzo(a)pyrene ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Benzo(b)fluoranthene ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Benzo(g,h,i)perylene ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Benzo(k)fluoranthene ND I ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 bls(2- ND I ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Chloroethoxy)methane bis(2-Chloroethyl)ether ND I ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 bis(2-Chloroisopropyl)ether ND I ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 bis(2-Ethylhexyl)phthalate ND 5 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 4-Bromophenylphenylether ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Butylbenzylphthalate ND 2 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 4-Chloro-3-methylphenol ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 2-Chloronaphthalene ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 2-Chlorophenol ND 2 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 4-Chlorophenylphenylether ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Chrysene ND I ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Dibenzo(a,h)anthracene ND I ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 1,2-Dichlorobenzene ND I ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 1,3-Dichlorobenzene ND I ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 1,4-Dichlorobenzene ND I ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 3,3'-Dichlorobenzidine ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 2,4-Dichlorophenol ND 2 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Diethylphthalate ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 2,4-Dimethylphenol ND 2 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Dimethylphthalate ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Di-n-butylphthalate ND 2 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 4,6-Dinitro-2- methylphenol ND 2 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 2,4-Dinitrophenol ND 5 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 2,4-Dinitrotoluene ND I ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 2,6-Dinitrotoluene ND I ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Di-n-octylphthalate ND 5 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 1,2-Diphenylhydrazine ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Fluoranthene I ND 1 I ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Page 13 of 29 November 2, 2021 Lab ID : SP 2113807-004 Description : WW-04 Final Effluent Customer ID 2-11369 Sample Result- Organic Constituent Rcsult PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 625.1 Fluorene ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Hexachlorobenzene ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Hexachlorobutadiene ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Hexachlorocyclopentadiene ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Hexachloroethane ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Indeno(1,2,3-c,d)pyrene ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Isophorone ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Naphthalene ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Nitrobenzene ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 2-Nitrophenol ND 2 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 4-Nitrophenol ND 2 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 N-Nitrosodimethylamine ND 2 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 N-Nitrosodi-n-propylamine ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 N-Nitrosodiphenylamine ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Non-Chlorinated Phenolics ND -- ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Pentachlorophenol ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Phenanthrene ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Phenol ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Pyrene ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 Pyridine ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 1,2,4-Trichlorobenzene ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 2,4,6-Trichlorophenol ND 1 ug/L 625.1 10/04/21:211465 625.1 10/07/21:215662 2,4,5-Trichlorophenol I ND 1 2 1 ug/L 1 625.1 10/04/21:211465 625.1 10/07/21:215662 ND=Non-Detected.PQL=Practical Quantitation Limit.$Surrogate.*PQL adjusted for dilution. Page 14 of 29 .0 "AGRICULTURAL Analytical Chemists November 2, 2021 Lab ID : SP 2113807 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Cone. QC Data DQO Note Organic 1,1,1,2-Tetrachloroethane 5030B 10/11/21:212110VRG Blank ug/L ND <0.5 1,1,1-Trichloroethane(TCA) 5030B 10/11/21:212110VRG Blank u /L ND <0.5 1,1,2,2-Tetrachloroethane 5030B 10/11/21:212110VRG Blank ug/L ND <0.5 1,1,2-Trichloroethane 5030B 10/11/21:212110VRG Blank u /L ND <0.5 1,1-Dichloroethane 5030B 10/11/21:212110VRG Blank ug/L ND <0.5 1,1-Dichloroethylene 5030B 10/11/21:212110VRG Blank ug/L ND <0.5 LCS ug/L 25.00 63.9% 52-137 MS ug/L 25.00 69.8% 25-179 (SP 2113807-001) MSD ug/L 25.00 65.0% 25-179 MSRPD u /L 0.000 7.2% 1 <26 1,1-Dichloropropene 5030B 10/11/21:212110VRG Blank ug/L ND <0.5 1,2,3-Trichlorobenzene 5030B 10/11/21:212110VRG Blank u /L ND <10 1,2,4-Trichlorobenzene 5030B 10/11/21:212110VRG Blank ug/L ND <10 1,2,4-Trimeth lbenzene 5030B 10/11/21:212110VRG Blank a /L ND <0.5 1,2-Dichlorobenzene 5030B 10/11/21:212110VRG Blank ug/L ND <0.5 1,2-Dichloroethane(EDC) 5030B 10/11/21:212110VRG Blank u /L ND <0.5 1,2-Dichloroethane-d4 5030B 10/11/21:212110VRG Blank ug/L 25.00 107% 84-126 LCS ug/L 25.00 ill% 84-126 MS ug/L 25.00 106% 84-126 (SP 2113807-001) MSD ug/L 25.00 109% 84-126 MSRPD u /L 0.000 2.7% <20.0 1,2-Dichloropropane 5030B 10/11/21:212110VRG Blank ug/L ND <0.5 1,3,5-Trimeth lbenzene 5030B 10/11/21:212110VRG Blank a /L ND <0.5 1,3-Dichlorobenzene 5030B 10/11/21:212110VRG Blank I ug/L ND <0.5 1,3-Dichloro ro ane 5030B 10/11/21:212110VRG Blank a /L ND <0.5 1,4-Dichlorobenzene 5030B 10/11/21:212110VRG Blank ug/L ND <0.5 2-Dichloro ro ane 5030B 10/11/21:212110VRG Blank u /L ND <0.5 Butanone(MEK) 5030B 10/11/21:212110VRG Blank ug/L ND <10 Chlorotoluene 5030B 10/11/21:212110VRG Blank u /L ND <0.5 Hexanone 5030B 10/11/21:212110VRG Blank ug/L ND <10 Bromofluorobenzene 5030B 10/11/21:212110VRG Blank ug/L 25.00 116% 78-125 LCS ug/L 25.00 116% 78-125 MS ug/L 25.00 117% 0-200 (SP 2113807-001) MSD ug/L 25.00 127% 0-200 MSRPD u /L 0.000 8.2% 1 520.0 4-Chlorotoluene 5030B 10/11/21:212110VRG Blank ug/L ND <0.5 4-Meth 1-2- entanone(M113K) 5030B 10/11/21:212110VRG Blank u /L ND <10 Acetone 5030B 10/11/21:212110VRG Blank ug/L ND <50 Acrolein 5030B 10/11/21:212110VRG Blank u /L ND <50 crylonitrile 5030B 10/11/21:212110VRG Blank ug/L ND <50 Benzene 5030B 10/11/21:212110VRG Blank ug/L ND <0.5 LCS ug/L 25.00 83.9% 60-134 MS ug/L 25.00 83.4% 47-169 (SP 2113807-001) MSD ug/L 25.00 80.2% 47-169 MSRPD ug/L 0.000 4.0% <24 romobenzene 5030B 10/11/21:212110VRG Blank u /L ND <0.5 romochloromethane 5030B 10/11/21:212110VRG Blank ug/L ND <0.5 romodichloromethane 5030B 10/11/21:212110VRG Blank u /L ND <0.5 romoform 5030B 10/11/21:212110VRG Blank ug/L ND <2 romomethane(Methyl Bromide) 5030B 10/11/21:212110VRG Blank u /L ND <0.5 Carbon Disulfide 5030B 10/11/21:212110VRG Blank ug/L ND <10 Carbon Tetrachloride 5030B 10/11/21:212110yRG Blank u /L ND <1 IC oro enzene 5030B 10/11/21:212110VRGnk ug/L ND <0.5 S ug/L 25.00 74.9% 56-152 S u /L 25.00 76.9% 31-212 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 November 2, 2021 Lab ID : SP 2113807 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Cone. QC Data DQO Note Organic Chlorobenzene 5030B (SP 2113807-001) MSD ug/L 25.00 69.6% 31-212 MSRPD u /L 0.000 9.9% <27 Chloroethane(Ethyl Chloride) 5030B 10/11/21:212110VRG Blank I u /L ND <1 Chloroform 5030B 10/11/21:212110VRG Blank ug/L ND <1 Chloromethane(Meth 1 Chloride) 5030B 10/11/21:212110VRG Blank u /L ND <0.5 cis-1,2-Dichloroethylene 5030B 10/11/21:212110VRG Blank ug/L ND <0.5 cis-1,3-Dichloro ro ene 5030B 10/11/21:212110VRG Blank u /L ND <0.5 ibromochloromethane 5030B 10/11/21:212110VRG Blank ug/L ND <2 ibromofluromethane 5030B 10/11/21:212110VRG Blank ug/L 25.00 106% 85-124 LCS ug/L 25.00 106% 85-124 MS ug/L 25.00 101% 85-124 (SP 2113807-001) MSD ug/L 25.00 103% 85-124 MSRPD ug/L 0.000 1.5% <20.0 ibromomethane 5030B 10/11/21:212110VRG Blank u /L ND <0.5 ichlorodifluoromethane 5030B 10/11/21:212110VRG Blank ug/L ND <0.5 ichloromethane 5030B 10/11/21:212110VRG Blank u /L ND <5 Ethyl tert-Butyl Ether 5030B 10/11/21:212110VRG Blank ug/L ND <2 th lbenzene 5030B 10/11/21:212110VRG Blank u /L ND <0.5 reon-II 5030B 10/11/21:212110VRG Blank ug/L ND <1 exachlorobutadiene 5030B 10/11/21:212110VRG Blank u /L ND <5 Isopropyl Ether 5030B 10/11/21:212110VRG Blank ug/L ND <5 sopropylbenzene 5030B 10/11/21:212110VRG Blank u /L ND <0.5 Methyl tert-Butyl Ether(MTBE) 5030B 10/11/21:212110VRG Blank ug/L ND <2 Naphthalene 5030B 10/11/21:212110VRG Blank u /L ND <10 n-Butylbenzene 5030B 10/11/21:212110VRG Blank ug/L ND <0.5 n-Propylbenzene 5030B 10/11/21:212110VRG Blank a /L ND <0.5 Isopropyltoluene 5030B 10/11/21:212110VRG Blank ug/L ND <0.5 see-Butylbenzene 5030B 10/11/21:212110VRG Blank u /L ND <0.5 Styrene 5030B 10/11/21:212110VRG Blank ug/L ND <0.5 TAME 5030B 10/11/21:212110VRG Blank u /L ND <5 ert-Butanol 5030B 10/11/21:212110VRG Blank ug/L ND <5 ert-But lbenzene 5030B 10/11/21:212110VRG Blank u /L ND <0.5 etrachloroethylene(PCE) 5030B 10/11/21:212110VRG Blank ug/L ND <0.5 Toluene 5030B 10/11/21:212110VRG Blank ug/L ND <0.5 LCS ug/L 25.00 83.7% 56-131 MS ug/L 25.00 84.9% 44-164 (SP 2113807-001) MSD ug/L 25.00 77.7% 44-164 MSRPD u /L 0.000 7.4% <30 Toluene-d8 5030B 10/11/21:212110VRG Blank ug/L 25.00 104% 77-129 LCS ug/L 25.00 106% 77-129 MS ug/L 25.00 105% 77-129 (SP 2113807-001) MSD ug/L 25.00 103% 77-129 MSRPD u /L 0.000 1.1% <20 trans-1,2-Dichloroethylene 5030B 10/11/21:212110VRG Blank ug/L ND <0.5 trans-1,3-Dichloro ro ene 5030B 10/11/21:212110VRG Blank u /L ND <0.5 richloroethylene(TCE) 5030B 10/11/21:212110VRGkBlank ug/L ND <0.5 ug/L 25.00 76.7% 61-123 ug/L 25.00 80.1% 41-167 (SP 2113807-001) ug/L 25.00 76.3% 41-167 u /L 0.000 5.0% <32 Vinyl Acetate 5030B 10/11/21:212110VRGug/L ND <10in 1 Chloride 5030B 10/11/21:212110VRGu /L ND <0.5ylenes m,p 5030B 10/11/21:212110VRGug/L ND <2 [Xylenes o 5030B 10/11/21:212110VRG I Blank u /L ND <2 Page 16 of 29 November 2, 2021 Lab ID : SP 2113807 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Conc. QC Data DQO Note Organic Aldrin 608.3 10/04/21:211466CTC Blank ug/L ND <0.05 LCS ug/L 0.5000 95.7% 42-140 BS ug/L 0.5000 89.0% 42-140 BSD ug/L 0.5000 79.2% 42-140 BSRPD u 0.5000 11.6% <35 Alpha BHC 608.3 10/04/21:211466CTC Blank ug/L ND <0.05 LCS ug/L 0.5000 95.7% 37-140 BS ug/L 0.5000 91.6% 37-140 BSD ug/L 0.5000 76.2% 37-140 BSRPD ug/L 0.5000 17.5% <36 Beta BHC 608.3 10/04/21:211466CTC Blank ug/L ND <0.05 LCS ug/L 0.5000 113% 17-147 BS ug/L 0.5000 114% 17-147 BSD ug/L 0.5000 97.9% 17-147 BSRPD ug/L 0.5000 15.2% <44 Chlordane 608.3 10/04/21:211466CTC Blank a ND <0.1 DD 608.3 10/04/21:211466CTC Blank ug/L ND <0.05 LCS ug/L 0.5000 105% 31-141 BS ug/L 0.5000 100% 32-130 BSD ug/L 0.5000 91.6% 32-130 BSRPD I u 0.5000 1 9.1% <39 DDE 608.3 10/04/21:211466CTC Blank ug/L ND <0.05 LCS ug/L 0.5000 92.4% 30-145 BS ug/L 0.5000 87.8% 13-133 BSD ug/L 0.5000 80.1% 13-133 BSRPD ug/L 0.5000 9.2% <35 DDT 608.3 10/04/21:211466CTC Blank ug/L ND <0.05 LCS ug/L 0.5000 107% 25-160 BS ug/L 0.5000 102% 6-146 BSD ug/L 0.5000 94.4% 6-146 BSRPD ug/L 0.5000 8.0% <42 Delta BHC 608.3 10/04/21:211466CTC Blank ug/L ND <0.05 LCS ug/L 0.5000 90.7% 19-140 BS ug/L 0.5000 78.1% 19-140 BSD ug/L 0.5000 67.0% 19-140 BSRPD a 0.5000 13.8% <52 Dieldrin 608.3 10/04/21:211466CTC Blank ug/L ND <0.05 LCS ug/L 0.5000 99.9% 36-146 BS ug/L 0.5000 95.7% 49-118 BSD ug/L 0.5000 87.8% 49-118 BSRPD a 0.5000 8.7% <49 ndosulfan I 608.3 10/04/21:211466CTC Blank ug/L ND <0.05 LCS ug/L 0.5000 115% 45-153 BS ug/L 0.5000 ill% 17-168 BSD ug/L 0.5000 101% 17-168 BSRPD a 0.5000 10.0% <28 ndosulfan 11 608.3 10/04/21:211466CTC Blank ug/L ND <0.05 LCS ug/L 0.5000 196% 5-202 BS ug/L 0.5000 190% 0-291 BSD ug/L 0.5000 176% 0-291 BSRPD ug/L 0.5000 7.9% <53 ndosulfan Sulfate 608.3 10/04/21:211466CTC Blank ug/L ND <0.05 LCS ug/L 0.5000 120% 26-144 BS a 0.5000 113% 47-128 Page 17 of 29 November 2, 2021 Lab ID : SP 2113807 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Cone. QC Data DQO Note Organic ndosulfan Sulfate 608.3 10/04/21:211466CTC BSD ug/L 0.5000 104% 47-128 BSRPD u /L 0.5000 8.4% <38 ndrin 608.3 10/04/21:211466CTC Blank ug/L ND <0.05 LCS ug/L 0.5000 110% 51-130 BS ug/L 0.5000 99.9% 43-132 BSD ug/L 0.5000 48.8% 43-132 BSRPD ug/L 0.5000 68.6% <48 410 ndrin Aldehyde 608.3 10/04/21:211466CTC Blank ug/L ND <0.05 LCS ug/L 0.5000 79.5% 50-130 BS ug/L 0.5000 83.4% 16-116 BSD ug/L 0.5000 75.0% 16-116 BSRPD ug/L 0.5000 10.6% <40 ndrin Ketone 608.3 10/04/21:211466CTC Blank ug/L ND <0.05 LCS ug/L 0.5000 150% 50-130 310 BS ug/L 0.5000 140% 28-162 BSD ug/L 0.5000 129% 28-162 BSRPD u /L 0.5000 8.2% <40 Heptachlor 608.3 10/04/21:211466CTC Blank ug/L ND <0.05 LCS ug/L 0.5000 97.8% 34-140 BS ug/L 0.5000 99.0% 34-140 BSD ug/L 0.5000 83.4% 34-140 BSRPD u /L 0.5000 17.0% <43 Heptachlor Epoxide 608.3 10/04/21:211466CTC Blank ug/L ND <0.05 LCS ug/L 0.5000 104% 37-142 BS ug/L 0.5000 100% 37-142 BSD ug/L 0.5000 89.6% 37-142 BSRPD u /L 0.5000 11.0% <26 indane 608.3 10/04/21:211466CTC Blank ug/L ND <0.05 LCS ug/L 0.5000 101% 19-140 BS ug/L 0.5000 102% 32-140 BSD ug/L 0.5000 78.7% 32-140 BSRPD u /L 0.5000 26.1% <39 ethoxychlor 608.3 10/04/21:211466CTC Blank ug/L ND <0.1 LCS ug/L 0.5000 121% 23-142 BS ug/L 0.5000 106% 51-126 BSD ug/L 0.5000 91.8% 51-126 BSRPD ug/L 0.5000 12.8% <40 CB 1016-1 608.3 10/04/21:211466CTC Blank u /L ND <0.5 CB 1221-1 608.3 10/04/21:211466CTC Blank ug/L ND <0.5 CB 1232-1 608.3 10/04/21:211466CTC Blank u /L ND <0.5 CB 1242-1 608.3 10/04/21:211466CTC Blank ug/L ND <0.5 CB 1248-1 608.3 10/04/21:211466CTC Blank u /L ND <0.5 CB 1254-1 608.3 10/04/21:211466CTC Blank ug/L ND <0.5 CB 1260-1 608.3 10/04/21:211466CTC Blank u /L ND <0.5 etrachloro-m-xylene 608.3 10/04/21:211466CTC Blank ug/L 0.5000 72.6% 5-124 LCS ug/L 0.5000 73.4% 5-124 BS ug/L 0.5000 76.1% 26-141 BSD ug/L 0.5000 67.9% 26-141 BSRPD u /L 0.5000 11.4% <1 410 Toxa hene 608.3 10/04/21:211466CTC Blank u /L ND <0.5 Aldrin 608/8081 10/21/21:216429AAJ CCV ug/L 50.00 104% 75-125 CCV ug/L 100.0 100% 75-125 CCV ug/L 100.0 92.7% 75-125 Alpha BHC 608/8081 10/21/21:216429AAJ CCV u /L 50.00 87.2% 69-125 Page 18 of 29 November 2, 2021 Lab ID : SP 2113807 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Cone. QC Data DQO Note Organic Alpha BHC 608/8081 10/22/21:216429AAJ CCV ug/L 100.0 96.4% 69-125 CCV a 100.0 91.9% 69-125 Beta BHC 608/8081 10/21/21:216429AAJ CCV ug/L 50.00 104% 75-125 CCV ug/L 100.0 98.9% 75-125 CCV u 100.0 98.1% 75-125 Delta BHC 608/8081 10/21/21:216429AAJ CCV ug/L 100.0 88.3% 75-125 CCV ug/L 100.0 85.3% 75-125 CCV u 50.00 97.8% 75-125 ieldrin 608/8081 10/21/21:216429AAJ CCV ug/L 50.00 104% 48-125 CCV ug/L 100.0 90.2% 48-125 CCV u 100.0 84.1% 48-125 ndosulfan I 608/8081 10/21/21:216429AAJ CCV ug/L 50.00 118% 75-125 CCV ug/L 100.0 102% 75-125 CCV I ug/L 100.0 100% 1 75-125 ndosulfan II 608/8081 10/21/21:216429AAJ CCV ug/L 50.00 159% 75-125 360 CCV ug/L 100.0 135% 75-125 360 CCV ug/L 100.0 123% 75-125 ndosulfan Sulfate 608/8081 10/21/21:216429AAJ CCV ug/L 50.00 107% 70-125 CCV ug/L 100.0 90.2% 70-125 CCV u 100.0 79.8% 70-125 ndrin 608/8081 10/21/21:216429AAJ CCV ug/L 50.00 102% 5-125 CCV ug/L 100.0 113% 5-125 CCV I u 100.0 117% 1 5-125 ndrin Aldehyde 608/8081 10/21/21:216429AAJ CCV ug/L 50.00 111% 5-125 CCV ug/L 100.0 87.5% 5-125 CCV u 100.0 81.2% 5-125 ndrin Ketone 608/8081 10/21/21:216429AAJ CCV ug/L 50.00 120% 5-125 CCV ug/L 100.0 95.2% 5-125 CCV u 100.0 84.5% 5-125 Heptachlor 608/8081 10/21/21:216429AAJ CCV ug/L 100.0 85.1% 75-125 CCV ug/L 100.0 80.9% 75-125 CCV I ug/L 50.00 87.1% 1 75-125 Heptachlor Epoxide 608/8081 10/21/21:216429AAJ CCV ug/L 50.00 108% 75-125 CCV ug/L 100.0 95.1% 75-125 CCV ug/L 100.0 88.8% 75-125 Lindane 608/8081 10/21/21:216429AAJ CCV ug/L 50.00 88.5% 75-125 CCV ug/L 100.0 91.6% 75-125 CCV ug/L 100.0 85.9% 75-125 ethoxychlor 608/8081 10/21/21:216871AAJ CCV ug/L 100.0 83.6% 75-125 CCV ug/L 100.0 82.7% 75-125 CCV I a 50.00 97.5% 1 75-125 p-DDD 608/8081 10/21/21:216429AAJ CCV ug/L 50.00 99.6% 75-125 CCV ug/L 100.0 89.7% 75-125 CCV a 100.0 87.8% 75-125 p,p-DDE 608/8081 10/21/21:216429AAJ CCV ug/L 50.00 95.1% 75-125 CCV a 100.0 81.4% 75-125 p,p-DDT 608/8081 10/21/21:216871AAJ CCV ug/L 50.00 91.5% 75-125 CCV ug/L 100.0 79.7% 75-125 Tetrachloro-m-xylene 608/8081 10/21/21:216429AAJ CCV ug/L 50.00 98.3% 85-115 CCV ug/L 100.0 100% 85-115 CCV a 100.0 98.7% 85-115 1,2,4-Trichlorobenzene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 65.4% 57-130 BS a 20.00 65.7% 44-142 Page 19 of 29 November 2, 2021 Lab ID : SP 2113807 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Conc. QC Data DQO Note Organic 1,2,4-Trichlorobenzene 625.1 10/04/21:211465CTC BSD ug/L 20.00 63.5% 44-142 BSRPD u /L 20.00 3.4% <50 625.1 10/07/21:215662SBL CCV mg/L 20.00 99.1% 61-130 1,2-Dichlorobenzene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 69.2% 25-100 BS ug/L 20.00 70.4% 21-115 BSD ug/L 20.00 69.1% 21-115 BSRPD I u /L 20.00 1.8% 1 <30 625.1 10/07/21:215662SBL CCV mg/L 20.00 104% 60-140 1,2-Diphenylhydrazine 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 76.6% 24-121 BS ug/L 20.00 76.5% 34-126 BSD ug/L 20.00 75.0% 34-126 BSRPD ug/L 20.00 2.1% S30 1,3-Dichlorobenzene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 65.8% 22-94 BS ug/L 20.00 68.0% 17-108 BSD ug/L 20.00 66.8% 17-108 BSRPD u /L 20.00 1.8% S30 625.1 10/07/21:215662SBL CCV mg/L 20.00 106% 60-140 1,4-Dichlorobenzene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 68.9% 24-98 BS ug/L 20.00 69.5% 20-112 BSD ug/L 20.00 68.0% 20-112 BSRPD ug/L 20.00 2.3% 1 <30 625.1 10/07/21:215662SBL CCV mg/L 20.00 104% 1 60-140 4,5-Trichlorophenol 625.1 10/04/21:211465CTC Blank ug/L ND <2 LCS ug/L 20.00 63.3% 10-112 BS ug/L 20.00 55.3% 32-156 BSD ug/L 20.00 56.4% 32-156 BSRPD u /L 20.00 1.9% <30 625.1 10/07/21:215662SBL CCV mg/L 20.00 101% 60-140 4,6-Tribromophenol 625.1 10/04/21:211465CTC Blank ug/L 20.00 60.5% 5-118 LCS ug/L 20.00 74.1% 5-118 BS ug/L 20.00 72.0% 38-109 BSD ug/L 20.00 70.6% 38-109 BSRPD u /L 20.00 2.0% <30 625.1 10/07/21:215662SBL CCV mg/L 20.00 150% 60-140 362 4,6-Trichlorophenol 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 63.0% 52-129 BS ug/L 20.00 53.4% 37-144 BSD ug/L 20.00 54.2% 37-144 BSRPD ug/L 20.00 1.5% 1 <58 625.1 10/07/21:215662SBL CCV m 20.00 103% 69-130 4-Dichlorophenol 625.1 10/04/21:211465CTC Blank ug/L ND <2 LCS ug/L 20.00 62.6% 53-122 BS ug/L 20.00 52.8% 39-135 BSD ug/L 20.00 54.6% 39-135 BSRPD u /L 20.00 3.3% <50 625.1 10/07/21:215662SBL CCV mg/L 20.00 105% 64-130 2,4-Dimethylphenol 625.1 10/04/21:211465CTC Blank ug/L ND <2 LCS ug/L 20.00 73.2% 42-120 BS ug/L 20.00 70.4% 32-120 BSD u /L 20.00 69.6% 32-120 Page 20 of 29 November 2, 2021 Lab ID : SP 2113807 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Cone. QC Data DQO Note Organic 4-Dimethylphenol 625.1 10/04/21:211465CTC BSRPD ug/L 20.00 1.0% <58 625.1 10/07/21:215662SBL CCV mg/L 20.00 101% 58-130 4-Dinitrophenol 625.1 10/04/21:211465CTC Blank ug/L ND <5 LCS ug/L 20.00 67.5% 1-173 BS ug/L 20.00 49.0% 5-191 BSD ug/L 20.00 46.1% 5-191 BSRPD I a 20.00 0.58 1 <5 625.1 10/07/21:215662SBL CCV mg/L 20.00 82.6% 39-173 4-Dinitrotoluene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 93.0% 48-127 BS ug/L 20.00 87.3% 39-139 BSD ug/L 20.00 90.7% 39-139 BSRPD u 20.00 3.8% <42 625.1 10/07/21:215662SBL CCV I mg/L 20.00 115% 53-130 6-Dinitrotoluene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 88.9% 68-137 BS ug/L 20.00 85.9% 50-158 BSD ug/L 20.00 85.8% 50-158 BSRPD ug/L 1 20.00 0.04% 548 625.1 10/07/21:215662SBL CCV mg/L 20.00 113% 68-137 Chlorophenol 625.1 10/04/21:211465CTC Blank ug/L ND <2 LCS ug/L 20.00 61.6% 36-120 BS ug/L 20.00 52.7% 23-134 BSD ug/L 20.00 54.0% 23-134 BSRPD I u 20.00 1 2.4% <61 625.1 10/07/21:215662SBL CCV mg/L 20.00 105% 55-130 2-Fluorobiphenyl 625.1 10/04/21:211465CTC Blank ug/L 10.00 65.8% 20-97 LCS ug/L 10.00 66.4% 20-97 BS ug/L 10.00 63.2% 22-97 BSD ug/L 10.00 61.7% 22-97 BSRPD a 20.00 2.4% 1 <30 625.1 10/07/21:215662SBL CCV mg/L 10.00 115% 60-140 2-Fuorophenol 625.1 10/04/21:211465CTC Blank ug/L 20.00 54.0% 5-95 LCS ug/L 20.00 61.4% 5-95 BS ug/L 20.00 49.9% 10-95 BSD ug/L 20.00 51.0% 10-95 BSRPD I u 20.00 2.1% S30 625.1 10/07/21:215662SBL CCV mg/L 20.00 156% 1 60-140 362 2-Nitrophenol 625.1 10/04/21:211465CTC Blank ug/L ND <2 LCS ug/L 20.00 65.5% 45-167 BS ug/L 20.00 57.9% 29-182 BSD ug/L 20.00 56.4% 29-182 BSRPD ug/L 20.00 2.7% <55 625.1 10/07/21:215662SBL CCV mg/L 20.00 108% 61-163 3,3-Dichlorobenzidine 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 51.2% 8-213 BS ug/L 20.00 60.4% 5-262 BSD ug/L 20.00 45.8% 5-262 BSRPD a 20.00 27.4% 1 <108 625.1 10/07/21:215662SBL CCV mg/L 20.00 108% 18-213 6-Dinitro-2-methylphenol 625.1 10/04/21:211465CTC Blank ug/L ND <2 LCS ug/L 20.00 61.1% 53-130 BS ug/L 20.00 51.8% 5-181 BSD a 20.00 52.2% 5-181 Page 21 of 29 November 2, 2021 Lab ID : SP 2113807 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Cone. QC Data DQO Note Organic 6-Dinitro-2-methylphenol 625.1 10/04/21:211465CTC BSRPD ug/L 20.00 0.8% S203 6-Dinitro-o-cresol 625.1 10/07/21:215662SBL CCV m /L 20.00 80.5% 56-130 Bromophenylphenylether 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 75.6% 65-120 BS ug/L 20.00 72.7% 53-127 BSD ug/L 20.00 73.2% 53-127 BSRPD I ug/L 20.00 0.6% 1 <43 625.1 10/07/21:215662SBL CCV m /L 20.00 100% 70-130 -Nitrophenol 625.1 10/04/21:211465CTC Blank ug/L ND <2 LCS ug/L 20.00 106% 13-129 BS ug/L 20.00 102% 5-132 BSD ug/L 20.00 91.4% 5-132 BSRPD ug/L 20.00 10.7% <131 625.1 10/07/21:215662SBL CCV mg/L 20.00 119% 1 35-130 cenaphthene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 79.2% 60-132 BS ug/L 20.00 77.7% 47-145 BSD ug/L 20.00 76.2% 47-145 BSRPD ug/L 20.00 2.0% S58 625.1 10/07/21:215662SBL CCV m /L 20.00 1 104% 70-130 cenaphthylene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 82.6% 54-126 BS ug/L 20.00 81.6% 33-145 BSD ug/L 20.00 81.0% 33-145 BSRPD I ug/L 20.00 0.7% 1 <74 625.1 10/07/21:215662SBL CCV m /L 20.00 104% 60-130 Anthracene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 80.5% 43-120 BS ug/L 20.00 79.4% 27-133 BSD ug/L 20.00 78.7% 27-133 BSRPD u 20.00 0.8% <66 625.1 10/07/21:215662SBL CCV mg/L 20.00 105% 58-130 Azobenzene 625.1 10/07/21:215662SBL CCV m /L 20.00 103% 60-140 Benzidine 625.1 10/04/21:211465CTC Blank ug/L ND <2 LCS ug/L 20.02 5.0% 0-33 BS ug/L 20.02 20.4% 0-21 BSD ug/L 20.02 33.9% 0-21 436 BSRPD u 20.00 2.7 <2 410 625.1 10/07/21:215662SBL CCV m /L 20.02 19.4% 18-213 Benzo(a)anthracene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 83.5% 42-133 BS ug/L 20.00 82.0% 33-143 BSD ug/L 20.00 81.5% 33-143 BSRPD I u 20.00 1 0.5% <53 625.1 10/07/21:215662SBL CCV mg/L 20.00 108% 42-133 enzo(a)pyrene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 84.8% 20-122 BS ug/L 20.00 84.0% 14-163 BSD ug/L 20.00 83.7% 14-163 BSRPD ug/L 20.00 0.3% <72 625.1 10/07/21:215662SBL CCV m /L 20.00 112% 32-148 enzo(b)fluoranthene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 83.1% 42-140 BS a 20.00 1 84.1% 24-159 Page 22 of 29 November 2, 2021 Lab ID : SP 2113807 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Cone. QC Data DQO Note Organic enzo(b)fluoranthene 625.1 10/04/21:211465CTC BSD ug/L 20.00 84.4% 24-159 BSRPD ug/L 20.00 0.3% <71 625.1 10/07/21:215662SBL CCV m /L 20.00 105% 42-140 Benzo(g,h,i)perylene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCs ug/L 20.00 81.0% 10-195 BS ug/L 20.00 81.7% 5-219 BSD ug/L 20.00 81.6% 5-219 BSRPD I ug/L 20.00 0.09% 1 <97 625.1 10/07/21:215662SBL CCV mg/L 20.00 105% 13-195 enzo(k)fluoranthene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 85.7% 25-146 BS ug/L 20.00 88.8% 11-162 BSD ug/L 20.00 91.4% 11-162 BSRPD ug/L 20.00 2.9% S63 625.1 10/07/21:215662SBL CCV m /L 20.00 ill% 25-146 bis(2-Chloroethoxy)methane 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 88.8% 49-165 BS ug/L 20.00 88.4% 33-184 BSD ug/L 20.00 87.0% 33-184 BSRPD ug/L 1 20.00 1.6% <54 625.1 10/07/21:215662SBL CCV m /L 20.00 ill% 52-164 bis(2-Chloroethyl)ether 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 88.0% 43-126 BS ug/L 20.00 88.4% 12-158 BSD ug/L 20.00 86.3% 12-158 BSRPD I ug/L 20.00 2.4% <108 625.1 10/07/21:215662SBL CCV mg/L 20.00 110% 52-130 bis(2-Chloroisopropyl)ether 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 83.7% 63-139 BS ug/L 20.00 86.4% 36-166 BSD ug/L 20.00 84.6% 36-166 BSRPD ug/L 1 20.00 2.1% <76 625.1 10/07/21:215662SBL CCV m /L 20.00 118% 63-139 is(2-Ethylhexyl)phthalate 625.1 10/04/21:211465CTC Blank ug/L ND <5 LCS ug/L 20.00 102% 29-137 BS ug/L 20.00 101% 8-158 BSD ug/L 20.00 103% 8-158 BSRPD I ug/L 20.00 0.37 <5 625.1 10/07/21:215662SBL CCV m /L 20.00 1 134% 43-137 utylbenzylphthalate 625.1 10/04/21:211465CTC Blank ug/L ND <2 LCS ug/L 20.00 102% 10-140 BS ug/L 20.00 103% 5-152 BSD ug/L 20.00 100% 5-152 BSRPD u 20.00 2.9% <60 625.1 10/07/21:215662SBL CCV mg/L 20.00 134% 43-140 Chloronaphthalene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 76.7% 65-120 BS ug/L 20.00 74.8% 60-120 BSD ug/L 20.00 73.9% 60-120 BSRPD u 20.00 1.2% <24 625.1 10/07/21:215662SBL CCV mg/L 20.00 100% 70-130 Chlorophenylphenylether 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 76.8% 38-145 BS I a 20.00 1 75.4% 25-158 Page 23 of 29 November 2, 2021 Lab ID : SP 2113807 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Cone. QC Data DQO Note Organic Chlorophenylphenylether 625.1 10/04/21:211465CTC BSD ug/L 20.00 75.4% 25-158 BSRPD ug/L 20.00 0.08% <61 625.1 10/07/21:215662SBL CCV m /L 20.00 100% 57-145 Chrysene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 47.0% 44-140 BS ug/L 20.00 46.2% 17-168 BSD ug/L 20.00 46.1% 17-168 BSRPD I ug/L 20.00 0.2% 1 <87 625.1 10/07/21:215662SBL CCV mg/L 20.00 105% 44-140 ibenzo(a,h)anthracene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 89.9% 10-200 BS ug/L 20.00 91.2% 5-227 BSD ug/L 20.00 89.9% 5-227 BSRPD ug/L 20.00 1.4% <126 625.1 10/07/21:215662SBL CCV m /L 20.00 109% 13-200 Diethylphthalate 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 90.2% 10-120 BS ug/L 20.00 90.3% 5-120 BSD ug/L 20.00 89.1% 5-120 BSRPD ug/L 1 20.00 1.3% <100 625.1 10/07/21:215662SBL CCV m /L 20.00 113% 47-130 iethylphthalate 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 83.8% 10-120 BS ug/L 20.00 82.4% 5-120 BSD ug/L 20.00 81.7% 5-120 BSRPD I ug/L 20.00 0.9% <183 625.1 10/07/21:215662SBL CCV mg/L 20.00 106% 50-130 Di-n-butylphthalate 625.1 10/04/21:211465CTC Blank ug/L ND <2 LCS ug/L 20.00 88.8% 8-120 BS ug/L 20.00 90.8% 1-120 BSD ug/L 20.00 91.4% 1-120 BSRPD ug/L 1 20.00 0.6% 547 625.1 10/07/21:215662SBL CCV m /L 20.00 110% 52-130 i-n-octylphthalate 625.1 10/04/21:211465CTC Blank ug/L ND <5 LCS ug/L 20.00 97.6% 28-164 BS ug/L 20.00 98.1% 4-146 BSD ug/L 20.00 96.6% 4-146 BSRPD I ug/L 20.00 0.29 <5 625.1 10/07/21:215662SBL CCV m /L 20.00 1 130% 21-132 Fluoranthene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 84.1% 43-121 BS ug/L 20.00 80.9% 26-137 BSD ug/L 20.00 82.1% 26-137 BSRPD u 20.00 1.4% <66 625.1 10/07/21:215662SBL CCV mg/L 20.00 95.7% 47-130 Fluorene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 81.6% 70-120 BS ug/L 20.00 79.8% 59-121 BSD ug/L 20.00 79.3% 59-121 BSRPD u 20.00 0.6% 1 <38 625.1 10/07/21:215662SBL CCV mg/L 20.00 107% 70-130 exachlorobenzene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 72.7% 8-142 BS I a 20.00 72.2% 5-152 Page 24 of 29 November 2, 2021 Lab ID : SP 2113807 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Conc. QC Data DQO Note Organic Hexachlorobenzene 625.1 10/04/21:211465CTC BSD ug/L 20.00 70.9% 5-152 BSRPD ug/L 20.00 1.7% <55 625.1 10/07/21:215662SBL CCV m /L 20.00 99.0% 38-142 Hexachlorobutadiene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCs ug/L 20.00 63.7% 38-120 BS ug/L 20.00 64.2% 24-120 BSD ug/L 20.00 63.6% 24-120 BSRPD I u 20.00 1.1% 1 <62 625.1 10/07/21:215662SBL CCV mg/L 20.00 106% 68-130 exachlorocyclopentadiene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 11.3% 0-29 BS ug/L 20.00 8.4% 0-55 BSD ug/L 20.00 7.1% 0-55 BSRPD ug/L 20.00 0.26 <1 625.1 10/07/21:215662SBL CCV m /L 20.00 88.9% 60-140 Hexachloroethane 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 69.3% 55-120 BS ug/L 20.00 73.6% 40-120 BSD ug/L 20.00 70.5% 40-120 BSRPD ug/L 1 20.00 4.2% <30 625.1 10/07/21:215662SBL CCV m /L 20.00 117% 55-130 deno(1,2,3-c,d)pyrene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 86.1% 10-151 BS ug/L 20.00 85.6% 5-171 BSD ug/L 20.00 87.4% 5-171 BSRPD I u 20.00 2.1% <99 625.1 10/07/21:215662SBL CCV mg/L 20.00 101% 13-151 Isophorone 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 83.4% 47-180 BS ug/L 20.00 83.7% 21-196 BSD ug/L 20.00 83.1% 21-196 BSRPD ug/L 1 20.00 0.6% S93 625.1 10/07/21:215662SBL CCV m /L 20.00 113% 52-180 Naphthalene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 76.8% 36-120 BS ug/L 20.00 76.6% 21-133 BSD ug/L 20.00 76.4% 21-133 BSRPD I ug/L 20.00 0.3% 1 <65 625.1 10/07/21:215662SBL CCV m /L 20.00 103% 70-130 Nitrobenzene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 92.2% 54-158 BS ug/L 20.00 91.6% 35-180 BSD ug/L 20.00 89.3% 35-180 BSRPD u 20.00 2.5% <62 625.1 10/07/21:215662SBL CCV mg/L 20.00 114% 1 54-158 Nitrobenzene-d5 625.1 10/04/21:211465CTC Blank ug/L 10.00 78.3% 15-314 LCS ug/L 10.00 82.6% 15-314 BS ug/L 10.00 80.1% 20-104 BSD ug/L 10.00 78.6% 20-104 BSRPD u 20.00 1.8% S30 625.1 10/07/21:215662SBL CCV mg/L 10.00 1 138% 46-219 Nitrosodimethylamine 625.1 10/04/21:211465CTC Blank ug/L ND <2 LCS ug/L 20.00 92.0% 15-121 BS----a 20.00 1 92.4% 23-129 Page 25 of 29 November 2, 2021 Lab ID : SP 2113807 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Cone. QC Data DQO Note Organic Nitrosodimethylamine 625.1 10/04/21:211465CTC BSD ug/L 20.00 91.6% 23-129 BSRPD ug/L 20.00 0.9% <30 625.1 10/07/21:215662SBL CCV m /L 20.00 117% 60-140 Nitrosodi-N-propylamine 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 88.4% 14-198 BS ug/L 20.00 89.5% 5-230 BSD ug/L 20.00 88.8% 5-230 BSRPD I ug/L 20.00 0.8% 1 <87 625.1 10/07/21:215662SBL CCV mg/L 20.00 116% 59-170 Nitrosodiphenylamine 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 104% 11-162 BS ug/L 20.00 107% 34-127 BSD ug/L 20.00 106% 34-127 BSRPD ug/L 20.00 0.9% <30 625.1 10/07/21:215662SBL CCV m /L 20.00 124% 60-140 p-Chloro-m-cresol 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 85.2% 41-128 BS ug/L 20.00 82.5% 22-147 BSD ug/L 20.00 82.6% 22-147 BSRPD ug/L 1 20.00 0.05% <73 625.1 10/07/21:215662SBL CCV m /L 20.00 123% 68-130 entachlorophenol 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 54.3% 38-152 BS ug/L 20.00 45.6% 14-176 BSD ug/L 20.00 46.5% 14-176 BSRPD I ug/L 20.00 2.1% <86 625.1 10/07/21:215662SBL CCV mg/L 20.00 72.3% 42-152 Phenanthrene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 79.1% 65-120 BS ug/L 20.00 78.3% 54-120 BSD ug/L 20.00 78.1% 54-120 BSRPD ug/L 20.00 0.2% <39 625.1 10/07/21:215662SBL CCV m /L 20.00 103% 67-130 Phenol 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 70.4% 17-120 BS ug/L 20.00 62.0% 5-120 BSD ug/L 20.00 61.8% 5-120 BSRPD ug/L 20.00 0.3% <64 625.1 10/07/21:215662SBL CCV m /L 20.00 108% 48-130 Phenol-d6 625.1 10/04/21:211465CTC Blank ug/L 20.00 74.3% 8-424 LCS ug/L 20.00 81.8% 8-424 BS ug/L 20.00 70.5% 8-104 BSD ug/L 20.00 71.1% 8-104 BSRPD I a 20.00 0.9% <30 625.1 10/07/21:215662SBL CCV mg/L 20.00 161% 48-208 p-Terphenyl-d14 625.1 10/04/21:211465CTC Blank ug/L 10.00 106% 18-106 LCS ug/L 10.00 78.1% 18-106 BS ug/L 10.00 77.4% 10-115 BSD ug/L 10.00 74.7% 10-115 BSRPD u 20.00 3.6% <30 625.1 10/07/21:215662SBL CCV mg/L 10.00 124% 60-140 Pyrene 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 84.7% 25-134 BS a 20.00 86.4% 52-120 Page 26 of 29 November 2, 2021 Lab ID : SP 2113807 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Cone. QC Data DQO Note Organic Pyrene 625.1 10/04/21:211465CTC BSD ug/L 20.00 84.4% 52-120 BSRPD u 20.00 2.3% <49 625.1 10/07/21:215662SBL CCV m /L 20.00 117% 70-130 Pyridine 625.1 10/04/21:211465CTC Blank ug/L ND <1 LCS ug/L 20.00 82.6% 60-140 BS ug/L 20.00 76.9% 0-99 BSD ug/L 20.00 74.6% 0-99 BSRPD I u 20.00 3.1% 1 <30 625.1 10/07/21:215662SBL CCV mg/L 20.00 108% 60-140 1,1,1,2-Tetrachloroethane 8260B 10/11/21:216242VRG CCV a 25.00 90.8% 70-130 1,1,1-Trichloroethane(TCA) 8260B 10/11/21:216242VRG CCV ug/L 25.00 101% 70-130 1,1,2,2-Tetrachloroethane 8260B 10/11/21:216242VRG CCV a 25.00 100% 70-130 1,1,2-Trichloroethane 8260B 10/11/21:216242VRG CCV ug/L 25.00 96.5% 70-130 1,1-Dichloroethane 8260B 10/11/21:216242VRG CCV u 25.00 122% 70-130 1,1-Dichloroethylene 8260B 10/11/21:216242VRG CCV ug/L 25.00 93.3% 80-120 1,1-Dichloro ro ene 8260B 10/11/21:216242VRG CCV a 25.00 92.6% 70-130 1,2,3-Trichlorobenzene 8260B 10/11/21:216242VRG CCV ug/L 25.00 15.4% 70-130 380 1,2,4-Trichlorobenzene 8260B 10/11/21:216242VRG CCV a 25.00 37.5% 70-130 380 1,2,4-Trimethylbenzene 8260B 10/11/21:216242VRG CCV ug/L 25.00 136% 70-130 360 1,2-Dichlorobenzene 8260B 10/11/21:216242VRG CCV u 25.00 102% 70-130 1,2-Dichloroethane(EDC) 8260B 10/11/21:216242VRG CCV ug/L 25.00 92.4% 70-130 1,2-Dichloroethane-d4 8260B 10/11/21:216242VRG CCV a 25.00 107% 70-130 1,2-Dichloropropane 8260B 10/11/21:216242VRG CCV ug/L 25.00 104% 80-120 1,3,5-Trimeth lbenzene 8260B 10/11/21:216242VRG CCV u 25.00 135% 70-130 360 1,3-Dichlorobenzene 8260B 10/11/21:216242VRG CCV ug/L 25.00 107% 70-130 1,3-Dichloro ro ane 8260B 10/11/21:216242VRG CCV u 25.00 95.1% 70-130 1,4-Dichlorobenzene 8260B 10/11/21:216242VRG CCV ug/L 25.00 95.8% 70-130 2-Dichloro ro ane 8260B 10/11/21:216242VRG CCV I a 25.00 182% 70-130 360 Butanone(MEK) 8260B 10/11/21:216242VRG CCV ug/L 80.00 164% 50-150 360 Chlorotoluene 8260B 10/11/21:216242VRG CCV a 25.00 132% 70-130 360 Hexanone 8260B 10/11/21:216242VRG CCV ug/L 80.00 249% 50-150 360 Bromofluorobenzene(BFB) 8260B 10/11/21:216242VRG CCV u 25.00 121% 70-130 Chlorotoluene 8260B 10/11/21:216242VRG CCV ug/L 25.00 114% 70-130 Meth 1-2- entanone(M113K) 8260B 10/11/21:216242VRG CCV u 80.00 201% 50-150 360 Acetone 8260B 10/11/21:216242VRG CCV ug/L 80.00 155% 50-150 360 crolein 8260B 10/11/21:216242VRG CCV a 100.0 77.6% 50-150 crylonitrile 8260B 10/11/21:216242VRG CCV ug/L 100.0 209% 50-150 360 Benzene 8260B 10/11/21:216242VRG CCV a 25.00 97.4% 70-130 romobenzene 8260B 10/11/21:216242VRG CCV ug/L 25.00 98.4% 70-130 romochloromethane 8260B 10/11/21:216242VRG CCV a 25.00 91.8% 70-130 romodichloromethane 8260B 10/11/21:216242VRG CCV ug/L 25.00 92.2% 70-130 romoform 8260B 10/11/21:216242VRG CCV a 25.00 73.2% 70-130 romomethane(Methyl Bromide) 8260B 10/11/21:216242VRG CCV ug/L 25.00 79.3% 70-130 Carbon Disulfide 8260B 10/11/21:216242VRG CCV a 80.00 103% 50-150 Carbon Tetrachloride 8260B 10/11/21:216242VRG CCV ug/L 25.00 77.1% 70-130 Chlorobenzene 8260B 10/11/21:216242VRG CCV a 25.00 92.3% 70-130 Chloroethane(Ethyl Chloride) 8260B 10/11/21:216242VRG CCV ug/L 25.00 97.7% 70-130 Chloroform 8260B 10/11/21:216242VRG CCV u 25.00 95.9% 80-120 Chloromethane(Methyl Chloride) 8260B 10/11/21:216242VRG CCV ug/L 25.00 161% 70-130 360 cis-1,2-Dichloroeth lene 8260B 10/11/21:216242VRG CCV u 25.00 106% 70-130 cis-1,3-Dichloropropene 8260B 10/11/21:216242VRG CCV ug/L 25.00 96.9% 70-130 ibromochloromethane 8260B 10/11/21:216242VRG CCV u 25.00 81.2% 70-130 ibromofluromethane 8260B 10/11/21:216242VRG CCV ug/L L 25.00 103% 70-130 Page 27 of 29 November 2, 2021 Lab ID : SP 2113807 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Cone. QC Data DQO Note Organic ibromomethane 8260B 10/11/21:216242VRG CCV ug/L 25.00 87.0% 70-130 ichlorodifluoromethane 8260B 10/11/21:216242VRG CCV a 25.00 130% 70-130 ichloromethane 8260B 10/11/21:216242VRG CCV I ug/L 25.00 96.2% 1 70-130 Ethyl tert-Butyl Ether 8260B 10/11/21:216242VRG CCV a 25.00 143% 50-150 thylbenzene 8260B 10/11/21:216242VRG CCV ug/L 25.00 95.4% 80-120 exachlorobutadiene 8260B 10/11/21:216242VRG CCV u 25.00 55.5% 70-130 380 Isopropyl Ether 8260B 10/11/21:216242VRG CCV ug/L 25.00 168% 50-150 360 Isopropylbenzene 8260B 10/11/21:216242VRG CCV a 25.00 123% 70-130 Methyl tert-Butyl Ether 8260B 10/11/21:216242VRG CCV ug/L 25.00 133% 70-130 360 Naphthalene 8260B 10/11/21:216242VRG CCV a 25.00 23.2% 70-130 380 Butylbenzene 8260B 10/11/21:216242VRG CCV ug/L 25.00 146% 70-130 360 n-Propylbenzene 8260B 10/11/21:216242VRG CCV u 25.00 132% 70-130 360 Isopropyltoluene 8260B 10/11/21:216242VRG CCV ug/L 25.00 142% 70-130 360 sec-Butylbenzene 8260B 10/11/21:216242VRG CCV a 25.00 134% 70-130 360 Styrene 8260B 10/11/21:216242VRG CCV ug/L 25.00 97.8% 70-130 TAME 8260B 10/11/21:216242VRG CCV a 25.00 148% 50-150 ert-Butanol 8260B 10/11/21:216242VRG CCV ug/L 125.0 110% 50-150 ert-But lbenzene 8260B 10/11/21:216242VRG CCV u 25.00 140% 70-130 360 etrachloroethylene(PCE) 8260B 10/11/21:216242VRG CCV ug/L 25.00 75.5% 70-130 Toluene 8260B 10/11/21:216242VRG CCV a 25.00 98.4% 80-120 Toluene-d8 8260B 10/11/21:216242VRG CCV ug/L 25.00 112% 70-130 trans-1,2-Dichloroeth lene 8260B 10/11/21:216242VRG CCV a 25.00 99.3% 70-130 ans-1,3-Dichloropropene 8260B 10/11/21:216242VRG CCV ug/L 25.00 97.3% 70-130 richloroeth lene(TCE) 8260B 10/11/21:216242VRG CCV u 25.00 85.6% 70-130 richlorofluoromethane F-I I 8260B 10/11/21:216242VRG CCV ug/L 25.00 67.5% 70-130 380 Vinyl Acetate 8260B 10/11/21:216242VRG CCV a 80.00 154% 50-150 360 Vinyl Chloride 8260B 10/11/21:216242VRG CCV ug/L 25.00 113% 80-120 J�ylene m,p 8260B 10/11/21:216242VRG CCV u 50.00 99.3% 70-130 ylenes o 8260B 10/11/21:216242VRG CCV ug/L 25.00 104% 70-130 Definition CCV :Continuing Calibration Verification-Analyzed to verify the instrument calibration is within criteria. Blank :Method Blank-Prepared to verify that the preparation process is not contributing contamination to the samples. LCS :Laboratory Control Standard/Sample-Prepared to verify that the preparation process is not affecting analyte recovery. MS Matrix Spikes-A random sample is spiked with a known amount of analyte.The recoveries are an indication of how that sample matrix affects analyte recovery. MSD :Matrix Spike Duplicate of MS/MSD pair-A random sample duplicate is spiked with a known amount of analyte.The recoveries are an indication of how that sample matrix affects analyte recovery. BS :Blank Spikes-A blank is spiked with a known amount of analyte.It is prepared to verify that the preparation process is not affecting analyte recovery. BSD :Blank Spike Duplicate of BSBSD pair-A blank duplicate is spiked with a known amount of analyte.It is prepared to verify that the preparation process is not affecting analyte recovery. MSRPD :MS/MSD Relative Percent Difference(RPD)-The MS relative percent difference is an indication of precision for the preparation and analysis. BSRPD :BSBSD Relative Percent Difference(RPD)-The BS relative percent difference is an indication of precision for the preparation and analysis. ND :Non-detect-Result was below the DQO listed for the analyte. DQO :Data Quality Objective-This is the criteria against which the quality control data is compared. Explanation 310 :LCS above Acceptance Range(AR).Samples which were non detect for this analyte were accepted. 360 :CCV above Acceptance Range(AR).Samples which were non detect for this analyte were accepted. 362 :Surrogates are qualified on Control Chart Limits,these are CCV limits.See individual sample reports. 380 :CCV met CCC and SPCC criteria,Results were reported. 410 :Relative Percent Difference(RPD)not within Maximum Allowable Value(MAV).Data was accepted based on the LCS or CCV recovery. Page 28 of 29 November 2, 2021 Lab ID : SP 2113807 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Explanation 436 :Blank Spike(BS)not within Acceptance Range(AR).Data was accepted based on the LCS or CCV recovery. Page 29 of 29 ENVIRONMENTJ Analytical Chemists October 21, 2021 South Tahoe Public Utility District 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Subject: Subcontract Analysis for FGL Lab No. SP 2113807 Enclosed please find results for the following sample(s) which were received by FGL. • Sub Organic-EPA 8270,EPA 8082,EPA 8081 Please note that this analysis was performed by Babcock Laboratories, Inc. (ELAP Certified Laboratory) Thank you for using FGL Environmental. Sincerely, Digitally signed by Cindy Aguirre Cindy Aguirre Title:Customer service Rep Date:2021-10-21 Enclosure Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 1 of 24 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2113807 Santa Paula, CA 93060 Work Order Number: ClJ0519 Report Date: 19-Oct-2021 Received on Ice(Y/N): Yes Temp: 8 °C Attached is the analytical report for the sample(s) received for your project. Below is a list of the individual sample descriptions with the corresponding laboratory number(s). Also, enclosed is a copy of the Chain of Custody document(if received with your sample(s)). Please note any unused portion of the sample(s) may be responsibly discarded after 30 days from the above report date, unless you have requested otherwise. Thank you for the opportunity to serve your analytical needs. If you have any questions or concerns regarding this report please contact our client service department. Sample Identification Lab Sample# Client Sample ID Matrix Date Sampled By Date Submitted By ClJ0519-01 WW-10 Centrifuge Cake Grab Solid 09/29/21 0:00 OPS/LDA/KV 10/05/21 13:02 GLS mailing location P(951)653-3351 CA ELAP No. 2698 P.O.Box 432 6100 Quail Valley Court F(951)653-1662 EPA No. CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No. OR4035 LACSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 2 of 24 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2113807 Santa Paula, CA 93060 Work Order Number: ClJ0519 Report Date: 19-Oct-2021 Received on Ice(Y/N): Yes Temp: 8 °C Laboratory Reference Number C1J0519-01 Sample Description Matrix Sampled Date/Time Received Date/Time WW-10 Centrifuge Cake Solid 09/29/21 00:00 10/05/21 13:02 Analyte(s) Result RDL Units Method Analysis Date Analyst Flag Organochlorine Pesticides and PCBs by EPA 8000 Series 4,4'-DDD ND 40 ug/kg EPA 8081A 10/11/21 23:10 LLU N_RLm, NCALInd 4,4'-DDE ND 30 ug/kg EPA 8081A 10/11/21 23:10 LLU N_RLm, NCALIm 4,4'-DDT ND 40 ug/kg EPA 8081A 10/11/21 23:10 LLU N_RLm, NCALIm a-BHC ND 40 ug/kg EPA 8081A 10/11/21 23:10 LLU N_RLm, NCALIm Aldrin ND 20 ug/kg EPA 8081A 10/11/21 23:10 LLU N_RLm, NCALIm b-BHC ND 40 ug/kg EPA 8081A 10/11/21 23:10 LLU N_RLm, NCALIm Chlordane ND 250 ug/kg EPA 8081A 10/11/21 23:10 LLU N_RLm d-BHC ND 70 ug/kg EPA 8081A 10/11/21 23:10 LLU N_RLm, NCALInd Dieldrin ND 30 ug/kg EPA 8081A 10/11/21 23:10 LLU N_RLm, NCALIm Endosulfan I ND 30 ug/kg EPA 8081A 10/11/21 23:10 LLU N_RLm, NCALIm Endosulfan II ND 40 ug/kg EPA 8081A 10/11/21 23:10 LLU N_RLm, NCALIm Endosulfan Sulfate ND 100 ug/kg EPA 8081A 10/11/21 23:10 LLU N_RLm, NCALIm Endrin ND 30 ug/kg EPA 8081A 10/11/21 23:10 LLU N_RLm, NCALIm Endrin Aldehyde ND 70 ug/kg EPA 8081A 10/11/21 23:10 LLU N_RLm, NCALIm Heptachlor ND 30 ug/kg EPA 8081A 10/11/21 23:10 LLU N_RLm, NCALIm Heptachlor Epoxide ND 30 ug/kg EPA 8081A 10/11/21 23:10 LLU N_RLm, NCALIm Hexachlorobenzene ND 400 ug/kg EPA 8081A 10/11/21 23:10 LLU N_RLm, NCALIm Lindane ND 40 ug/kg EPA 8081A 10/11/21 23:10 LLU N_RLm, NCALIm Methoxychlor ND 270 ug/kg EPA 8081A 10/11/21 23:10 LLU N_RLm, NCALIm Toxaphene ND 800 ug/kg EPA 8081A 10/11/21 23:10 LLU N_RLm mailing location P(951)653-3351 CA ELAP No. 2698 P.O.Box 432 6100 Quail Valley Court F(951)653-1662 EPA No. CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No. OR4035 LACSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 3 of 24 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2113807 Santa Paula, CA 93060 Work Order Number: ClJ0519 Report Date: 19-Oct-2021 Received on Ice(Y/N): Yes Temp: 8 °C Laboratory Reference Number C1J0519-01 Sample Description Matrix Sampled Date/Time Received Date/Time WW-10 Centrifuge Cake Solid 09/29/21 00:00 10/05/21 13:02 Analyte(s) Result RDL Units Method Analysis Date Analyst Flag Organochlorine Pesticides and PCBs by EPA 8000 Series Aroclor 1016 ND 10000 ug/kg EPA 8082 10/08/21 11:44 LLU N_RLm, NMint Aroclor 1221 ND 10000 ug/kg EPA 8082 10/08/21 11:44 LLU N_RLm Aroclor 1232 ND 10000 ug/kg EPA 8082 10/08/21 11:44 LLU N_RLm Aroclor 1242 ND 10000 ug/kg EPA 8082 10/08/21 11:44 LLU N_RLm Aroclor 1248 ND 10000 ug/kg EPA 8082 10/08/21 11:44 LLU N_RLm Aroclor 1254 ND 10000 ug/kg EPA 8082 10/08/21 11:44 LLU N_RLm Aroclor 1260 ND 10000 ug/kg EPA 8082 10/08/21 11:44 LLU N_RLm Surrogate:Decachlorobiphenyl 45% 10-216 EPA 8081A 10/11/21 23:10 LLU N RLm Surrogate:Decachlorobiphenyl 66% 10-158 EPA 8082 10/08/21 11:44 LLU N RLm Semivolatile Organic Compounds by EPA 8270C 1,2,4-Trichlorobenzene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm 1,2-Dichlorobenzene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm 1,2-Diphenylhydrazine ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm 1,3,5-Trinitrobenzene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm, NMint 1,3-Dichlorobenzene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm 1,4-Dichlorobenzene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm 2,4,6-Trichlorophenol ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm 2,4-Dichlorophenol ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm 2,4-Dimethylphenol ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm 2,4-Dinitrophenol ND 50 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm, NMint 2,4-Dinitrotoluene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm 2,6-Dichlorophenol ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm 2,6-Dinitrotoluene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm 2-Chloronaphthalene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm 2-Chlorophenol ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm 2-Methyl-4,6-Dinitrophenol ND 50 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm, NMint 2-Nitrophenol ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm 2-Picoline ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm mailing location P(951)653-3351 CA ELAP No. 2698 P.O.Box 432 6100 Quail Valley Court F(951)653-1662 EPA No. CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No. OR4035 LACSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 4 of 24 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2113807 Santa Paula, CA 93060 Work Order Number: ClJ0519 Report Date: 19-Oct-2021 Received on Ice(Y/N): Yes Temp: 8 °C Laboratory Reference Number C1J0519-01 Sample Description Matrix Sampled Date/Time Received Date/Time WW-10 Centrifuge Cake Solid 09/29/21 00:00 10/05/21 13:02 Analyte(s) Result RDL Units Method Analysis Date Analyst Flag Semivolatile Organic Compounds by EPA 8270C 3,3'-Dichlorobenzidine ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm, NMint 4,4'-DDD ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm 4,4'-DDE ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm 4,4'-DDT ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm, NMint 4-Bromophenyl phenyl ether ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm 4-Chloro-3-methylphenol ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm 4-Chlorophenyl phenyl ether ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm 4-Nitrophenol ND 100 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm, NMint a-BHC ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Acenaphthene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Acenaphthylene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Aldrin ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Anthracene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Aroclor 1016(screen) ND 50 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Aroclor 1221 (screen) ND 50 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Aroclor 1232(screen) ND 50 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Aroclor 1242(screen) ND 50 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Aroclor 1248(screen) ND 50 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Aroclor 1254(screen) ND 50 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Aroclor 1260(screen) ND 50 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm b-BHC ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Benzidine ND 100 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm, NMint Benzo(a)anthracene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Benzo(a)pyrene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Benzo(b)fluoranthene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Benzo(ghi)perylene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Benzo(k)fluoranthene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Bis(2-chloroethoxy)methane ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Bis(2-Chloroethyl)ether ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm mailing location P(951)653-3351 CA ELAP No. 2698 P.O.Box 432 6100 Quail Valley Court F(951)653-1662 EPA No. CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No. OR4035 LACSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 5 of 24 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2113807 Santa Paula, CA 93060 Work Order Number: ClJ0519 Report Date: 19-Oct-2021 Received on Ice(Y/N): Yes Temp: 8 °C Laboratory Reference Number C1J0519-01 Sample Description Matrix Sampled Date/Time Received Date/Time WW-10 Centrifuge Cake Solid 09/29/21 00:00 10/05/21 13:02 Analyte(s) Result RDL Units Method Analysis Date Analyst Flag Semivolatile Organic Compounds by EPA 8270C Bis(2-chIoroisopropyl)Ether ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Bis(2-ethylhexyl)phthalate ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Butyl benzyl phthalate ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Chlordane(screen) ND 50 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Chrysene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm d-BHC ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Dibenzo(a,h)anthracene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Dieldrin ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm, NMint Diethyl phthalate ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Dimethyl phthalate ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Di-n-butylphthalate ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Di-n-octylphthalate ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm, NMint Endosulfan I ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Endosulfan 11 ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Endosulfan Sulfate ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Endrin ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Fluoranthene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Fluorene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Heptachlor ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm, NMint Heptachlor Epoxide ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Hexachlorobenzene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Hexachlorobutadiene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Hexachlorocyclo pentad iene ND 500 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm, NMint Hexachloroethane ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Indeno(1,2,3-cd)pyrene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Isophorone ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Naphthalene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Nitrobenzene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm N-Nitrosodi-n-propylamine ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm mailing location P(951)653-3351 CA ELAP No. 2698 P.O.Box 432 6100 Quail Valley Court F(951)653-1662 EPA No. CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No. OR4035 LACSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 6 of 24 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2113807 Santa Paula, CA 93060 Work Order Number: ClJ0519 Report Date: 19-Oct-2021 Received on Ice(Y/N): Yes Temp: 8 °C Laboratory Reference Number C1J0519-01 Sample Description Matrix Sampled Date/Time Received Date/Time WW-10 Centrifuge Cake Solid 09/29/21 00:00 10/05/21 13:02 Analyte(s) Result RDL Units Method Analysis Date Analyst Flag Semivolatile Organic Compounds by EPA 8270C N-Nitrosodimethylamine ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm N-Nitrosodiphenylamine ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Pentachlorophenol ND 100 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Phenanthrene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Phenol ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Pyrene ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Toxaphene(screen) ND 50 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm y-BHC ND 10 mg/kg EPA 8270C 10/13/21 14:46 MOF N_RLm Surrogate:2,4,6-Tribromophenol 86% 10-122 EPA 8270C 10/13/21 14:46 MOF N RLm Surrogate:2-Fluorobiphenyl 52% 10-109 EPA 8270C 10/13/21 14:46 MOF N RLm Surrogate:2-Fluorophenol 30% 10-96 EPA 8270C 10/13/21 14:46 MOF N RLm Surrogate:4-Terphenyl-04 86% 14-126 EPA 8270C 10/13/21 14:46 MOF N RLm Surrogate:Nitrobenzene-d5 54% 10-106 EPA 8270C 10/13/21 14:46 MOF N RLm Surrogate:Phenol-d6 45% 10-103 EPA 8270C 10/13/21 14:46 MOF N RLm mailing location P(951)653-3351 CA ELAP No. 2698 P.O.Box 432 6100 Quail Valley Court F(951)653-1662 EPA No. CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No. OR4035 LACSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 7 of 24 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2113807 Santa Paula, CA 93060 Work Order Number: C1J0519 Report Date: 19-Oct-2021 Received on Ice(Y/N): Yes Temp: 8 °C Solids- Batch Quality Control Spike Source %REC RPD Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch 1J13154-Analyzed as received Blank(1J13154-BLK1) Prepared&Analyzed: 10/13/21 Total Solids ND 0.10 % Duplicate(1J13154-DUP1) Source:ClJ0519-01 Prepared&Analyzed: 10/13/21 Total Solids 26.9 0.10 % 26.8 0.4 25 mailing location P(951)653-3351 CA ELAP No. 2698 P.O.Box 432 6100 Quail Valley Court F(951)653-1662 EPA No. CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No. OR4035 LACSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 8 of 24 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2113807 Santa Paula, CA 93060 Work Order Number: ClJ0519 Report Date: 19-Oct-2021 Received on Ice(Y/N): Yes Temp: 8 °C Organochlorine Pesticides and PCBs by EPA 8000 Series- Batch Quality Control Spike Source %REC RPD Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch 1J07126-EPA 3545 Mod-Pressurized Fluid Extracton Blank(1J07126-BLK1) Prepared: 10/07/21 Analyzed: 10/11/21 4,4'-DDD ND 4.0 ug/kg 4,4'-DDE ND 3.0 ug/kg 4,4'-DDT ND 4.0 ug/kg a-BHC ND 4.0 ug/kg Aldrin ND 2.0 ug/kg b-BHC ND 4.0 ug/kg Chlordane ND 25 ug/kg d-BHC ND 7.0 ug/kg Dieldrin ND 3.0 ug/kg Endosulfan I ND 3.0 ug/kg Endosulfan II ND 4.0 ug/kg Endosulfan Sulfate ND 10 ug/kg Endrin ND 3.0 ug/kg Endrin Aldehyde ND 7.0 ug/kg Heptachlor ND 3.0 ug/kg Heptachlor Epoxide ND 3.0 ug/kg Hexachlorobenzene ND 40 ug/kg Lindane ND 4.0 ug/kg Methoxychlor ND 27 ug/kg Toxaphene ND 80 ug/kg Surrogate: 46 ug/kg 50.0 93 10-216 Decachlorobiphenyl LCS(lJ07126-BSI) Prepared: 10/07/21 Analyzed: 10/11/21 4,4'-DDD 15.5 4.0 ug/kg 16.7 93 49-111 4,4'-DDE 15.0 3.0 ug/kg 16.7 90 47-106 4,4'-DDT 14.8 4.0 ug/kg 16.7 89 41-114 a-BHC 16.0 4.0 ug/kg 16.7 96 27-109 Aldrin 15.0 2.0 ug/kg 16.7 90 30-110 b-BHC 14.3 4.0 ug/kg 16.7 86 32-119 d-BHC 11.8 7.0 ug/kg 16.7 71 27-88 Dieldrin 15.0 3.0 ug/kg 16.7 90 46-106 Endosulfan 1 14.5 3.0 ug/kg 16.7 87 39-107 Endosulfan II 15.5 4.0 ug/kg 16.7 93 35-115 Endosulfan Sulfate 15.6 10 ug/kg 16.7 94 32-112 mailing location P(951)653-3351 CA ELAP No. 2698 P.O.Box 432 6100 Quail Valley Court F(951)653-1662 EPA No. CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No. OR4035 LACSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 9 of 24 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2113807 Santa Paula, CA 93060 Work Order Number: ClJ0519 Report Date: 19-Oct-2021 Received on Ice(Y/N): Yes Temp: 8 °C Organochlorine Pesticides and PCBs by EPA 8000 Series- Batch Quality Control Spike Source %REC RPD Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch 1J07126-EPA 3545 Mod-Pressurized Fluid Extracton LCS(lJ07126-BS1) Prepared: 10/07/21 Analyzed: 10/11/21 Endrin 18.4 3.0 ug/kg 16.7 110 46-118 Endrin Aldehyde 9.45 7.0 ug/kg 16.7 57 23-105 Heptachlor 14.8 3.0 ug/kg 16.7 89 22-125 Heptachlor Epoxide 14.8 3.0 ug/kg 16.7 89 40-108 Hexachlorobenzene 14.7 40 ug/kg 16.7 88 29-109 Lindane 14.2 4.0 ug/kg 16.7 85 27-112 Methoxychlor 60.4 27 ug/kg 66.7 91 45-123 Surrogate: 44 ug/kg 50.0 88 10-216 Decachlorobiphenyl Matrix Spike(lJ07126-MS1) Source:ClJ0419-01 Prepared: 10/07/21 Analyzed: 10/11/21 4,4'-DDD 9.25 40 ug/kg 16.7 ND 55 14-149 4,4'-DDE 22.2 30 ug/kg 16.7 ND 133 10-140 4,4'-DDT ND 40 ug/kg 16.7 ND 10-138 Wint a-BHC 13.1 40 ug/kg 16.7 ND 79 27-99 Aldrin 21.6 20 ug/kg 16.7 18.8 17 40-92 Wint b-BHC 56.4 40 ug/kg 16.7 45.6 65 15-130 d-BHC 15.4 70 ug/kg 16.7 ND 93 10-98 Dieldrin 13.8 30 ug/kg 16.7 3.75 60 18-125 Endosulfan 1 3.93 30 ug/kg 16.7 ND 24 16-127 Endosulfan II 12.8 40 ug/kg 16.7 ND 77 29-108 Endosulfan Sulfate 11.8 100 ug/kg 16.7 ND 71 19-121 Endrin 22.1 30 ug/kg 16.7 2.95 115 24-127 Endrin Aldehyde 26.0 70 ug/kg 16.7 ND 156 10-103 Wint Heptachlor 13.9 30 ug/kg 16.7 ND 84 10-125 Heptachlor Epoxide 27.7 30 ug/kg 16.7 ND 166 46-101 Wint Hexachlorobenzene 16.2 400 ug/kg 16.7 ND 97 29-115 Lindane 35.1 40 ug/kg 16.7 ND NR 20-108 (]Mint Methoxychlor 9.50 270 ug/kg 66.7 ND 14 10-157 Surrogate: 37 ug/kg 50.0 73 10-216 Decachlorobiphenyl mailing location P(951)653-3351 CA ELAP No. 2698 P.O.Box 432 6100 Quail Valley Court F(951)653-1662 EPA No. CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No. OR4035 LACSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 10 of 24 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2113807 Santa Paula, CA 93060 Work Order Number: ClJ0519 Report Date: 19-Oct-2021 Received on Ice(Y/N): Yes Temp: 8 °C Organochlorine Pesticides and PCBs by EPA 8000 Series- Batch Quality Control Spike Source %REC RPD Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch 1J07126-EPA 3545 Mod-Pressurized Fluid Extracton Matrix Spike Dup(lJ07126-MSD1) Source:ClJ0419-01 Prepared: 10/07/21 Analyzed: 10/11/21 4,4'-DDD 9.50 40 ug/kg 16.7 ND 57 14-149 3 40 4,4'-DDE 15.0 30 ug/kg 16.7 ND 90 10-140 39 30 QRPDo 4,4'-DDT 15.9 40 ug/kg 16.7 ND 95 10-138 40 Wint a-BHC 14.2 40 ug/kg 16.7 ND 85 27-99 8 30 Aldrin 9.86 20 ug/kg 16.7 18.8 NR 40-92 NR 30 Wint b-BHC 67.5 40 ug/kg 16.7 45.6 131 15-130 68 40 WoRo d-BHC 12.5 70 ug/kg 16.7 ND 75 10-98 21 30 Dieldrin 11.6 30 ug/kg 16.7 3.75 47 18-125 25 25 Endosulfan 1 12.4 30 ug/kg 16.7 ND 74 16-127 104 20 QRPDo Endosulfan II 10.4 40 ug/kg 16.7 ND 62 29-108 21 30 Endosulfan Sulfate 10.8 100 ug/kg 16.7 ND 65 19-121 9 40 Endrin 22.8 30 ug/kg 16.7 2.95 119 24-127 3 30 Endrin Aldehyde 28.6 70 ug/kg 16.7 ND 172 10-103 10 50 Wint Heptachlor 18.0 30 ug/kg 16.7 ND 108 10-125 25 30 Heptachlor Epoxide 37.8 30 ug/kg 16.7 ND NR 46-101 31 40 Wint Hexachlorobenzene 22.0 400 ug/kg 16.7 ND 132 29-115 31 40 Wint Lindane 43.9 40 ug/kg 16.7 ND NR 20-108 22 40 Wint Methoxychlor ND 270 ug/kg 66.7 ND 10-157 40 Wint Surrogate: 36 ug/kg 50.0 72 10-216 Decachlorobiphenyl Batch 1J07127-EPA 3545 Mod-Pressurized Fluid Extracton Blank(lJ07127-BLK1) Prepared: 10/07/21 Analyzed: 10/08/21 Aroclor 1016 ND 1000 ug/kg Aroclor 1221 ND 1000 ug/kg Aroclor 1232 ND 1000 ug/kg Aroclor 1242 ND 1000 ug/kg Aroclor 1248 ND 1000 ug/kg Aroclor 1254 ND 1000 ug/kg Aroclor 1260 ND 1000 ug/kg Surrogate:2,4,5,6 41.7 ug/kg 50.0 83 10-134 Tetrachloro-m-xylene Surrogate: 52.6 ug/kg 50.0 105 10-158 Decachlorobiphenyl mailing location P(951)653-3351 CA ELAP No. 2698 P.O.Box 432 6100 Quail Valley Court F(951)653-1662 EPA No. CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No. OR4035 LACSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 11 of 24 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2113807 Santa Paula, CA 93060 Work Order Number: ClJ0519 Report Date: 19-Oct-2021 Received on Ice(Y/N): Yes Temp: 8 °C Organochlorine Pesticides and PCBs by EPA 8000 Series- Batch Quality Control Spike Source %REC RPD Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch 1J07127-EPA 3545 Mod-Pressurized Fluid Extracton LCS(lJ07127-BS1) Prepared: 10/07/21 Analyzed: 10/08/21 Aroclor 1016 542 1000 ug/kg 667 81 47.8-122 Aroclor 1260 558 1000 ug/kg 667 84 48.3-127 Surrogate:2,4,5,6 41.1 ug/kg 50.0 82 10-134 Tetrachloro-m-xylene Surrogate: 54.2 ug/kg 50.0 108 10-158 Decachlorobiphenyl Matrix Spike(1J07127-MS1) Source:ClJ0519-01 Prepared: 10/07/21 Analyzed: 10/08/21 Aroclor 1016 1800 10000 ug/kg 667 ND NR 23-195 Wint Aroclor 1260 727 10000 ug/kg 667 ND 109 13.5-134 Surrogate:2,4,5,6 51.1 ug/kg 50.0 102 10-134 Tetrachloro-m-xylene Surrogate: 38.8 ug/kg 50.0 78 10-158 Decachlorobiphenyl Matrix Spike Dup(1J07127-MSD1) Source:ClJ0519-01 Prepared: 10/07/21 Analyzed: 10/08/21 Aroclor 1016 1520 10000 ug/kg 667 ND NR 23-195 42 Wint Aroclor 1260 675 10000 ug/kg 667 ND 101 13.5-134 32 Surrogate:2,4,5,6 26.0 ug/kg 50.0 52 10-134 Te tra chloro-m-xylene Surrogate: 27.2 ug/kg 50.0 54 10-158 Decachlorobiphenyl mailing location P(951)653-3351 CA ELAP No. 2698 P.O.Box 432 6100 Quail Valley Court F(951)653-1662 EPA No. CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No. OR4035 LACSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 12 of 24 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2113807 Santa Paula, CA 93060 Work Order Number: ClJ0519 Report Date: 19-Oct-2021 Received on Ice(Y/N): Yes Temp: 8 °C Semivolatile Organic Compounds by EPA 8270C- Batch Quality Control Spike Source %REC RPD Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch 1J12123-EPA 3545 Mod-Pressurized Fluid Extracton Blank(1J12123-BLK1) Prepared: 10/12/21 Analyzed: 10/13/21 1,2,4-Trichlorobenzene ND 1.0 mg/kg 1,2-Dichlorobenzene ND 1.0 mg/kg 1,2-Diphenylhydrazine ND 1.0 mg/kg 1,3,5-Trinitrobenzene ND 1.0 mg/kg 1,3-Dichlorobenzene ND 1.0 mg/kg 1,4-Dichlorobenzene ND 1.0 mg/kg 2,4,6-Trichlorophenol ND 1.0 mg/kg 2,4-Dichlorophenol ND 1.0 mg/kg 2,4-Di methyl phenol ND 1.0 mg/kg 2,4-Dinitrophenol ND 5.0 mg/kg 2,4-Dinitrotoluene ND 1.0 mg/kg 2,6-Dichlorophenol ND 1.0 mg/kg 2,6-Dinitrotoluene ND 1.0 mg/kg 2-Chloronaphthalene ND 1.0 mg/kg 2-Chlorophenol ND 1.0 mg/kg 2-Methyl-4,6-Dinitrophenol ND 5.0 mg/kg 2-Nitrophenol ND 1.0 mg/kg 2-Picoline ND 1.0 mg/kg 3,3'-Dichlorobenzidine ND 1.0 mg/kg 4,4'-DDD ND 1.0 mg/kg 4,4'-DDE ND 1.0 mg/kg 4,4'-DDT ND 1.0 mg/kg 4-Bromophenyl phenyl ether ND 1.0 mg/kg 4-Chloro-3-methylphenol ND 1.0 mg/kg 4-Chlorophenyl phenyl ether ND 1.0 mg/kg 4-Nitrophenol ND 10 mg/kg a-BHC ND 1.0 mg/kg Acenaphthene ND 1.0 mg/kg Acenaphthylene ND 1.0 mg/kg Aldrin ND 1.0 mg/kg Anthracene ND 1.0 mg/kg Aroclor 1016(screen) ND 5.0 mg/kg Aroclor 1221 (screen) ND 5.0 mg/kg Aroclor 1232(screen) ND 5.0 mg/kg Aroclor 1242(screen) ND 5.0 mg/kg mailing location P(951)653-3351 CA ELAP No. 2698 P.O.Box 432 6100 Quail Valley Court F(951)653-1662 EPA No. CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No. OR4035 LACSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 13 of 24 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2113807 Santa Paula, CA 93060 Work Order Number: ClJ0519 Report Date: 19-Oct-2021 Received on Ice(Y/N): Yes Temp: 8 °C Semivolatile Organic Compounds by EPA 8270C- Batch Quality Control Spike Source %REC RPD Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch 1J12123-EPA 3545 Mod-Pressurized Fluid Extracton Blank(1J12123-BLK1) Prepared: 10/12/21 Analyzed: 10/13/21 Aroclor 1248(screen) ND 5.0 mg/kg Aroclor 1254(screen) ND 5.0 mg/kg Aroclor 1260(screen) ND 5.0 mg/kg b-BHC ND 1.0 mg/kg Benzidine ND 10 mg/kg Benzo(a)anth race ne ND 1.0 mg/kg Benzo(a)pyrene ND 1.0 mg/kg Benzo(b)fluoranthene ND 1.0 mg/kg Benzo(ghi)perylene ND 1.0 mg/kg Benzo(k)fluoranthene ND 1.0 mg/kg Bis(2-chloroethoxy)methane ND 1.0 mg/kg Bis(2-Chloroethyl)ether ND 1.0 mg/kg Bis(2-chloroisopropyl)Ether ND 1.0 mg/kg Bis(2-ethylhexyl)phthalate ND 1.0 mg/kg Butyl benzyl phthalate ND 1.0 mg/kg Chlordane(screen) ND 5.0 mg/kg Chrysene ND 1.0 mg/kg d-BHC ND 1.0 mg/kg Dibenzo(a,h)anthracene ND 1.0 mg/kg Dieldrin ND 1.0 mg/kg Diethyl phthalate ND 1.0 mg/kg Dimethyl phthalate ND 1.0 mg/kg Di-n-butylphthalate ND 1.0 mg/kg Di-n-octylphthalate ND 1.0 mg/kg Endosulfan I ND 1.0 mg/kg Endosulfan II ND 1.0 mg/kg Endosulfan Sulfate ND 1.0 mg/kg Endrin ND 1.0 mg/kg Fluoranthene ND 1.0 mg/kg Fluorene ND 1.0 mg/kg Heptachlor ND 1.0 mg/kg Heptachlor Epoxide ND 1.0 mg/kg Hexachlorobenzene ND 1.0 mg/kg Hexachlorobutadiene ND 1.0 mg/kg Hexachlorocyclopentadiene ND 50 mg/kg mailing location P(951)653-3351 CA ELAP No. 2698 P.O.Box 432 6100 Quail Valley Court F(951)653-1662 EPA No. CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No. OR4035 LACSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 14 of 24 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2113807 Santa Paula, CA 93060 Work Order Number: ClJ0519 Report Date: 19-Oct-2021 Received on Ice(Y/N): Yes Temp: 8 °C Semivolatile Organic Compounds by EPA 8270C- Batch Quality Control Spike Source %REC RPD Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch 1J12123-EPA 3545 Mod-Pressurized Fluid Extracton Blank(1J12123-BLK1) Prepared: 10/12/21 Analyzed: 10/13/21 Hexachloroethane ND 1.0 mg/kg Indeno(1,2,3-cd)pyrene ND 1.0 mg/kg Isophorone ND 1.0 mg/kg Naphthalene ND 1.0 mg/kg Nitrobenzene ND 1.0 mg/kg N-Nitrosodi-n-propylamine ND 1.0 mg/kg N-Nitrosodimethylamine ND 1.0 mg/kg N-Nitrosodiphenylamine ND 1.0 mg/kg Pentachlorophenol ND 10 mg/kg Phenanthrene ND 1.0 mg/kg Phenol ND 1.0 mg/kg Pyrene ND 1.0 mg/kg Toxaphene(screen) ND 5.0 mg/kg y-BHC ND 1.0 mg/kg Surrogate: ND mg/kg 2.50 66 10-122 2,4,6-Tribromophenol Surrogate:2-Fluorobiphenyl ND mg/kg 1.67 58 10-109 Surrogate:2-Fluorophenol ND mg/kg 2.50 62 10-96 Surrogate:4-Terphenyl-d14 ND mg/kg 1.67 60 14-126 Surrogate:Nitrobenzene-d5 ND mg/kg 1.67 61 10-106 Surrogate:Phenol-d6 ND mg/kg 2.50 62 10-103 LCS(1J12123-BS1) Prepared: 10/12/21 Analyzed: 10/13/21 1,2,4-Trichlorobenzene 2.38 1.0 mg/kg 3.33 71 24-99 1,2-Dichlorobenzene 2.18 1.0 mg/kg 3.33 65 16-97 1,2-Diphenylhydrazine 2.74 1.0 mg/kg 3.33 82 47-112 1,3,5-Trinitrobenzene 3.00 1.0 mg/kg 3.33 90 52-116 1,3-Dichlorobenzene 2.13 1.0 mg/kg 3.33 64 13-95 1,4-Dichlorobenzene 2.17 1.0 mg/kg 3.33 65 14-95 2,4,6-Trichlorophenol 2.68 1.0 mg/kg 3.33 81 38-113 2,4-Dichlorophenol 2.48 1.0 mg/kg 3.33 74 32-109 2,4-Di methyl phenol 2.35 1.0 mg/kg 3.33 71 33-108 2,4-Dinitrophenol 2.74 5.0 mg/kg 3.33 82 33-120 2,4-Dinitrotoluene 2.67 1.0 mg/kg 3.33 80 48-109 2,6-Dichlorophenol 2.47 1.0 mg/kg 3.33 74 28-106 2,6-Dinitrotoluene 2.64 1.0 mg/kg 3.33 79 43-115 mailing location P(951)653-3351 CA ELAP No. 2698 P.O.Box 432 6100 Quail Valley Court F(951)653-1662 EPA No. CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No. OR4035 LACSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 15 of 24 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2113807 Santa Paula, CA 93060 Work Order Number: ClJ0519 Report Date: 19-Oct-2021 Received on Ice(Y/N): Yes Temp: 8 °C Semivolatile Organic Compounds by EPA 8270C- Batch Quality Control Spike Source %REC RPD Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch 1J12123-EPA 3545 Mod-Pressurized Fluid Extracton LCS(1J12123-BS1) Prepared: 10/12/21 Analyzed: 10/13/21 2-Chloronaphthalene 2.28 1.0 mg/kg 3.33 68 29-111 2-Chlorophenol 2.27 1.0 mg/kg 3.33 68 25-103 2-Methyl-4,6-Dinitrophenol 2.69 5.0 mg/kg 3.33 81 48-114 2-Nitrophenol 2.37 1.0 mg/kg 3.33 71 24-109 2-Picoline 1.91 1.0 mg/kg 3.33 57 10-86 3,3'-Dichlorobenzidine 2.06 1.0 mg/kg 3.33 62 10-124 4,4'-DDD 2.97 1.0 mg/kg 3.33 89 49-115 4,4'-DDE 2.89 1.0 mg/kg 3.33 87 52-109 4,4'-DDT 3.09 1.0 mg/kg 3.33 93 47-108 4-Bromophenyl phenyl ether 2.51 1.0 mg/kg 3.33 75 45-110 4-Chloro-3-methylphenol 2.80 1.0 mg/kg 3.33 84 42-111 4-Chlorophenyl phenyl ether 2.81 1.0 mg/kg 3.33 84 42-106 4-Nitrophenol 3.11 10 mg/kg 3.33 93 32-133 a-BHC 2.71 1.0 mg/kg 3.33 81 47-104 Acenaphthene 2.37 1.0 mg/kg 3.33 71 36-108 Acenaphthylene 2.41 1.0 mg/kg 3.33 72 34-109 Aldrin 2.62 1.0 mg/kg 3.33 78 45-110 Anthracene 2.53 1.0 mg/kg 3.33 76 49-111 b-BHC 3.04 1.0 mg/kg 3.33 91 53-103 Benzidine 1.71 10 mg/kg 3.33 51 50-150 Benzo(a)anthracene 2.59 1.0 mg/kg 3.33 78 52-111 Benzo(a)pyrene 2.67 1.0 mg/kg 3.33 80 42-120 Benzo(b)fluoranthene 2.30 1.0 mg/kg 3.33 69 40-122 Benzo(ghi)perylene 2.42 1.0 mg/kg 3.33 73 38-129 Benzo(k)fluoranthene 3.20 1.0 mg/kg 3.33 96 43-119 Bis(2-chloroethoxy)methane 2.56 1.0 mg/kg 3.33 77 29-105 Bis(2-Chloroethyl)ether 2.27 1.0 mg/kg 3.33 68 14-103 Bis(2-chloroisopropyl)Ether 2.70 1.0 mg/kg 3.33 81 15-109 Bis(2-ethylhexyl)phthalate 2.50 1.0 mg/kg 3.33 75 50-117 Butyl benzyl phthalate 2.38 1.0 mg/kg 3.33 72 50-113 Chrysene 2.62 1.0 mg/kg 3.33 79 53-112 d-BHC 2.73 1.0 mg/kg 3.33 82 52-107 Dibenzo(a,h)anthracene 2.39 1.0 mg/kg 3.33 72 37-127 Dieldrin 2.82 1.0 mg/kg 3.33 85 52-108 Diethyl phthalate 2.52 1.0 mg/kg 3.33 76 47-112 mailing location P(951)653-3351 CA ELAP No. 2698 P.O.Box 432 6100 Quail Valley Court F(951)653-1662 EPA No. CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No. OR4035 LACSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 16 of 24 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2113807 Santa Paula, CA 93060 Work Order Number: ClJ0519 Report Date: 19-Oct-2021 Received on Ice(Y/N): Yes Temp: 8 °C Semivolatile Organic Compounds by EPA 8270C- Batch Quality Control Spike Source %REC RPD Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch 1J12123-EPA 3545 Mod-Pressurized Fluid Extracton LCS(1J12123-BS1) Prepared: 10/12/21 Analyzed: 10/13/21 Dimethyl phthalate 2.56 1.0 mg/kg 3.33 77 45-112 Di-n-butylphthalate 2.53 1.0 mg/kg 3.33 76 50-115 Di-n-octylphthalate 2.44 1.0 mg/kg 3.33 73 44-119 Endosulfan 1 2.75 1.0 mg/kg 3.33 82 42-112 Endosulfan II 2.73 1.0 mg/kg 3.33 82 50-109 Endosulfan Sulfate 3.77 1.0 mg/kg 3.33 113 56-113 Endrin 2.78 1.0 mg/kg 3.33 83 41-112 Fluoranthene 2.78 1.0 mg/kg 3.33 84 52-111 Fluorene 2.59 1.0 mg/kg 3.33 78 41-107 Heptachlor 2.29 1.0 mg/kg 3.33 69 51-109 Heptachlor Epoxide 2.87 1.0 mg/kg 3.33 86 53-107 Hexachlorobenzene 2.52 1.0 mg/kg 3.33 76 45-109 Hexachlorobutadiene 2.63 1.0 mg/kg 3.33 79 21-98 Hexachlorocyclopentadiene 2.57 50 mg/kg 3.33 77 10-124 Hexachloroethane 2.24 1.0 mg/kg 3.33 67 13-95 Indeno(1,2,3-cd)pyrene 2.48 1.0 mg/kg 3.33 74 36-128 Isophorone 2.53 1.0 mg/kg 3.33 76 31-105 Naphthalene 2.28 1.0 mg/kg 3.33 68 18-107 Nitrobenzene 2.53 1.0 mg/kg 3.33 76 19-106 N-Nitrosodi-n-propylamine 2.51 1.0 mg/kg 3.33 75 21-106 N-Nitrosodimethylamine 2.41 1.0 mg/kg 3.33 72 16-95 N-Nitrosodiphenylamine 4.71 1.0 mg/kg 6.67 71 27-200 Pentachlorophenol 2.74 10 mg/kg 3.33 82 34-127 Phenanthrene 2.47 1.0 mg/kg 3.33 74 47-111 Phenol 2.32 1.0 mg/kg 3.33 70 30-104 Pyrene 2.47 1.0 mg/kg 3.33 74 52-114 y-BHC 2.80 1.0 mg/kg 3.33 84 48-104 Surrogate: 2.3 mg/kg 2.50 91 10-122 2,4,6-Tribromophenol Surrogate:2-Fluorobiphenyl 1.1 mg/kg 1.67 65 10-109 Surrogate:2-Fluorophenol 1.7 mg/kg 2.50 67 10-96 Surrogate:4-Terphenyl-d14 1.3 mg/kg 1.67 81 14-126 Surrogate:Nitrobenzene-d5 1.2 mg/kg 1.67 69 10-106 Surrogate:Phenol-d6 1.8 mg/kg 2.50 71 10-103 mailing location P(951)653-3351 CA ELAP No. 2698 P.O.Box 432 6100 Quail Valley Court F(951)653-1662 EPA No. CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No. OR4035 LACSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 17 of 24 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2113807 Santa Paula, CA 93060 Work Order Number: ClJ0519 Report Date: 19-Oct-2021 Received on Ice(Y/N): Yes Temp: 8 °C Semivolatile Organic Compounds by EPA 8270C- Batch Quality Control Spike Source %REC RPD Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch 1J12123-EPA 3545 Mod-Pressurized Fluid Extracton Matrix Spike(1J12123-MS1) Source:ClJ0519-01 Prepared: 10/12/21 Analyzed: 10/13/21 1,2,4-Trichlorobenzene 1.71 10 mg/kg 3.33 ND 51 10-100 1,2-Dichlorobenzene 0.907 10 mg/kg 3.33 ND 27 10-99 1,2-Diphenylhydrazine 2.71 10 mg/kg 3.33 ND 81 17-128 1,3,5-Trinitrobenzene 0.993 10 mg/kg 3.33 0.773 7 10-180 Wint 1,3-Dichlorobenzene 0.753 10 mg/kg 3.33 ND 23 10-94 1,4-Dichlorobenzene 0.860 10 mg/kg 3.33 ND 26 10-93 2,4,6-Trichlorophenol 2.93 10 mg/kg 3.33 0.167 83 29-117 2,4-Dichlorophenol 2.07 10 mg/kg 3.33 ND 62 19-110 2,4-Di methyl phenol 2.14 10 mg/kg 3.33 ND 64 18-111 2,4-Dinitrophenol 1.39 50 mg/kg 3.33 0.947 13 29-119 Wint 2,4-Dinitrotoluene 2.51 10 mg/kg 3.33 0.133 71 10-150 2,6-Dichlorophenol 2.12 10 mg/kg 3.33 ND 64 10-113 2,6-Dinitrotoluene 2.76 10 mg/kg 3.33 0.280 74 29-117 2-Chloronaphthalene 2.13 10 mg/kg 3.33 ND 64 10-200 2-Chlorophenol 1.49 10 mg/kg 3.33 ND 45 11-102 2-Methyl-4,6-Dinitrophenol 1.35 50 mg/kg 3.33 0.493 26 10-126 2-Nitrophenol 1.79 10 mg/kg 3.33 0.220 47 12-106 2-Picoline 0.960 10 mg/kg 3.33 0.187 23 10-69 3,3'-Dichlorobenzidine 0.273 10 mg/kg 3.33 0.120 5 10-113 Wint 4,4'-DDD 3.18 10 mg/kg 3.33 ND 95 10-164 4,4'-DDE 2.63 10 mg/kg 3.33 ND 79 14-138 4,4'-DDT 0.380 10 mg/kg 3.33 ND 11 10-135 4-Bromophenyl phenyl ether 2.45 10 mg/kg 3.33 ND 73 30-117 4-Chloro-3-methylphenol 2.55 10 mg/kg 3.33 0.107 73 30-115 4-Chlorophenyl phenyl ether 2.60 10 mg/kg 3.33 ND 78 26-115 4-Nitrophenol 3.99 100 mg/kg 3.33 0.820 95 14-147 a-BHC 2.82 10 mg/kg 3.33 ND 85 15-129 Acenaphthene 2.11 10 mg/kg 3.33 ND 63 22-112 Acenaphthylene 2.14 10 mg/kg 3.33 ND 64 22-114 Aldrin 3.05 10 mg/kg 3.33 0.313 82 10-127 Anthracene 2.47 10 mg/kg 3.33 0.167 69 30-122 b-BHC 2.96 10 mg/kg 3.33 0.367 78 21-122 Benzidine 1.67 100 mg/kg 3.33 0.487 36 50-150 Wint Benzo(a)anth race ne 2.57 10 mg/kg 3.33 ND 77 10-155 Benzo(a)pyrene 2.57 10 mg/kg 3.33 ND 77 10-132 mailing location P(951)653-3351 CA ELAP No. 2698 P.O.Box 432 6100 Quail Valley Court F(951)653-1662 EPA No. CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No. OR4035 LACSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 18 of 24 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2113807 Santa Paula, CA 93060 Work Order Number: ClJ0519 Report Date: 19-Oct-2021 Received on Ice(Y/N): Yes Temp: 8 °C Semivolatile Organic Compounds by EPA 8270C- Batch Quality Control Spike Source %REC RPD Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch 1J12123-EPA 3545 Mod-Pressurized Fluid Extracton Matrix Spike(1J12123-MS1) Source:ClJ0519-01 Prepared: 10/12/21 Analyzed: 10/13/21 Benzo(b)fluoranthene 2.35 10 mg/kg 3.33 0.133 66 10-148 Benzo(ghi)perylene 2.35 10 mg/kg 3.33 ND 71 16-122 Benzo(k)fluoranthene 2.99 10 mg/kg 3.33 ND 90 27-116 Bis(2-chloroethoxy)methane 2.17 10 mg/kg 3.33 ND 65 13-105 Bis(2-Chloroethyl)ether 1.18 10 mg/kg 3.33 ND 35 10-97 Bis(2-chloroisopropyl)Ether 1.65 10 mg/kg 3.33 ND 49 10-100 Bis(2-ethylhexyl)phthalate 8.49 10 mg/kg 3.33 5.28 96 20-143 Butyl benzyl phthalate 3.19 10 mg/kg 3.33 0.413 83 19-148 Chrysene 2.59 10 mg/kg 3.33 ND 78 10-150 d-BHC 2.61 10 mg/kg 3.33 0.280 70 22-124 Dibenzo(a,h)anthracene 2.27 10 mg/kg 3.33 ND 68 24-116 Dieldrin 19.5 10 mg/kg 3.33 ND NR 10-200 Wint Diethyl phthalate 2.55 10 mg/kg 3.33 ND 77 31-119 Dimethyl phthalate 2.47 10 mg/kg 3.33 ND 74 29-113 Di-n-butylphthalate 2.46 10 mg/kg 3.33 ND 74 10-183 Di-n-octylphthalate 2.99 10 mg/kg 3.33 2.38 18 10-171 Endosulfan 1 1.67 10 mg/kg 3.33 ND 50 10-200 Endosulfan II 3.07 10 mg/kg 3.33 1.14 58 18-125 Endosulfan Sulfate 2.83 10 mg/kg 3.33 1.42 42 10-194 Endrin 5.26 10 mg/kg 3.33 ND 158 10-179 Fluoranthene 2.43 10 mg/kg 3.33 ND 73 10-165 Fluorene 2.51 10 mg/kg 3.33 ND 75 24-116 Heptachlor 11.4 10 mg/kg 3.33 ND NR 10-131 Wint Heptachlor Epoxide 2.46 10 mg/kg 3.33 ND 74 21-124 Hexachlorobenzene 2.40 10 mg/kg 3.33 ND 72 20-123 Hexachlorobutadiene 1.71 10 mg/kg 3.33 ND 51 10-98 Hexachlorocyclopentadiene ND 500 mg/kg 3.33 ND 10-93 Wint Hexachloroethane 0.593 10 mg/kg 3.33 ND 18 10-86 Indeno(1,2,3-cd)pyrene 2.27 10 mg/kg 3.33 ND 68 19-121 Isophorone 2.24 10 mg/kg 3.33 0.327 57 15-105 Naphthalene 1.63 10 mg/kg 3.33 ND 49 10-104 Nitrobenzene 1.82 10 mg/kg 3.33 ND 55 10-103 N-Nitrosodi-n-propylamine 1.94 10 mg/kg 3.33 ND 58 10-105 N-Nitrosodimethylamine 0.740 10 mg/kg 3.33 ND 22 10-87 N-Nitrosodiphenylamine 4.83 10 mg/kg 6.67 ND 72 10-200 mailing location P(951)653-3351 CA ELAP No. 2698 P.O.Box 432 6100 Quail Valley Court F(951)653-1662 EPA No. CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No. OR4035 LACSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 19 of 24 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2113807 Santa Paula, CA 93060 Work Order Number: ClJ0519 Report Date: 19-Oct-2021 Received on Ice(Y/N): Yes Temp: 8 °C Semivolatile Organic Compounds by EPA 8270C- Batch Quality Control Spike Source %REC RPD Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch 1J12123-EPA 3545 Mod-Pressurized Fluid Extracton Matrix Spike(1J12123-MS1) Source:ClJ0519-01 Prepared: 10/12/21 Analyzed: 10/13/21 Pentachlorophenol 2.80 100 mg/kg 3.33 0.533 68 10-200 Phenanthrene 2.43 10 mg/kg 3.33 ND 73 26-121 Phenol 1.63 10 mg/kg 3.33 0.113 46 11-108 Pyrene 3.46 10 mg/kg 3.33 ND 104 10-155 y-BHC 2.41 10 mg/kg 3.33 0.260 65 16-121 Surrogate: 2.3 mg/kg 2.50 91 10-122 2,4,6-Tribromophenol Surrogate:2-Fluorobiphenyl 1.0 mg/kg 1.67 63 10-109 Surrogate:2-Fluorophenol 0.87 mg/kg 2.50 35 10-96 Surrogate:4-Terphenyl-d14 1.7 mg/kg 1.67 103 14-126 Surrogate:Nitrobenzene-d5 0.97 mg/kg 1.67 58 10-106 Surrogate:Phenol-d6 1.3 mg/kg 2.50 50 10-103 Matrix Spike Dup(1J12123-MSD1) Source:ClJ0519-01 Prepared: 10/12/21 Analyzed: 10/13/21 1,2,4-Trichlorobenzene 1.35 10 mg/kg 3.33 ND 41 10-100 40 1,2-Dichlorobenzene 0.867 10 mg/kg 3.33 ND 26 10-99 60 1,2-Diphenylhydrazine 2.17 10 mg/kg 3.33 ND 65 17-128 60 1,3,5-Trinitrobenzene 0.847 10 mg/kg 3.33 0.773 2 10-180 60 Wint 1,3-Dichlorobenzene 0.693 10 mg/kg 3.33 ND 21 10-94 60 1,4-Dichlorobenzene 0.773 10 mg/kg 3.33 ND 23 10-93 40 2,4,6-Trichlorophenol 2.34 10 mg/kg 3.33 0.167 65 29-117 60 2,4-Dichlorophenol 1.79 10 mg/kg 3.33 ND 54 19-110 40 2,4-Dimethylphenol 1.85 10 mg/kg 3.33 ND 56 18-111 40 2,4-Dinitrophenol 1.07 50 mg/kg 3.33 0.947 4 29-119 60 Wint 2,4-Dinitrotoluene 2.03 10 mg/kg 3.33 0.133 57 10-150 40 2,6-Dichlorophenol 1.70 10 mg/kg 3.33 ND 51 10-113 60 2,6-Dinitrotoluene 2.22 10 mg/kg 3.33 0.280 58 29-117 60 2-Chloronaphthalene 1.77 10 mg/kg 3.33 ND 53 10-200 60 2-Chorophenol 1.30 10 mg/kg 3.33 ND 39 11-102 40 2-Methyl-4,6-Dinitrophenol 0.760 50 mg/kg 3.33 0.493 8 10-126 60 Wint 2-Nitrophenol 1.57 10 mg/kg 3.33 0.220 41 12-106 60 2-Picoline 0.807 10 mg/kg 3.33 0.187 19 10-69 60 3,3'-Dichlorobenzidine 0.260 10 mg/kg 3.33 0.120 4 10-113 60 Wint 4,4'-DDD 2.23 10 mg/kg 3.33 ND 67 10-164 60 4,4'-DDE 2.07 10 mg/kg 3.33 ND 62 14-138 60 4,4'-DDT 0.233 10 mg/kg 3.33 ND 7 10-135 60 Wint mailing location P(951)653-3351 CA ELAP No. 2698 P.O.Box 432 6100 Quail Valley Court F(951)653-1662 EPA No. CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No. OR4035 LACSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 20 of 24 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2113807 Santa Paula, CA 93060 Work Order Number: ClJ0519 Report Date: 19-Oct-2021 Received on Ice(Y/N): Yes Temp: 8 °C Semivolatile Organic Compounds by EPA 8270C- Batch Quality Control Spike Source %REC RPD Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch 1J12123-EPA 3545 Mod-Pressurized Fluid Extracton Matrix Spike Dup(1J12123-MSD1) Source:ClJ0519-01 Prepared: 10/12/21 Analyzed: 10/13/21 4-Bromophenyl phenyl ether 2.07 10 mg/kg 3.33 ND 62 30-117 60 4-Chloro-3-methylphenol 2.11 10 mg/kg 3.33 0.107 60 30-115 40 4-Chlorophenyl phenyl ether 2.13 10 mg/kg 3.33 ND 64 26-115 60 4-Nitrophenol 0.627 100 mg/kg 3.33 0.820 NR 14-147 146 40 Wint a-BHC 2.26 10 mg/kg 3.33 ND 68 15-129 60 Acenaphthene 1.81 10 mg/kg 3.33 ND 54 22-112 40 Acenaphthylene 1.78 10 mg/kg 3.33 ND 53 22-114 60 Aldrin 2.14 10 mg/kg 3.33 0.313 55 10-127 60 Anthracene 2.03 10 mg/kg 3.33 0.167 56 30-122 60 b-BHC 2.77 10 mg/kg 3.33 0.367 72 21-122 60 Benzidine 1.44 100 mg/kg 3.33 0.487 29 50-150 60 Wint Benzo(a)anth race ne 2.09 10 mg/kg 3.33 ND 63 10-155 60 Benzo(a)pyrene 2.09 10 mg/kg 3.33 ND 63 10-132 60 Benzo(b)fluoranthene 1.73 10 mg/kg 3.33 0.133 48 10-148 60 Benzo(ghi)perylene 1.89 10 mg/kg 3.33 ND 57 16-122 60 Benzo(k)fluoranthene 2.28 10 mg/kg 3.33 ND 68 27-116 60 Bis(2-chloroethoxy)methane 1.67 10 mg/kg 3.33 ND 50 13-105 60 Bis(2-Chloroethyl)ether 1.06 10 mg/kg 3.33 ND 32 10-97 60 Bis(2-chloroisopropyl)Ether 1.29 10 mg/kg 3.33 ND 39 10-100 60 Bis(2-ethylhexyl)phthalate 6.34 10 mg/kg 3.33 5.28 32 20-143 29 60 Butyl benzyl phthalate 2.84 10 mg/kg 3.33 0.413 73 19-148 40 Chrysene 2.05 10 mg/kg 3.33 ND 61 10-150 60 d-BHC 2.18 10 mg/kg 3.33 0.280 57 22-124 60 Dibenzo(a,h)anthracene 1.74 10 mg/kg 3.33 ND 52 24-116 60 Dieldrin 16.1 10 mg/kg 3.33 ND NR 10-200 19 60 Wint Diethyl phthalate 2.05 10 mg/kg 3.33 ND 61 31-119 60 Dimethyl phthalate 2.07 10 mg/kg 3.33 ND 62 29-113 60 Di-n-butylphthalate 2.03 10 mg/kg 3.33 ND 61 10-183 60 Di-n-octylphthalate 2.45 10 mg/kg 3.33 2.38 2 10-171 60 Wint Endosulfan 1 6.48 10 mg/kg 3.33 ND 194 10-200 60 Endosulfan II 3.53 10 mg/kg 3.33 1.14 72 18-125 60 Endosulfan Sulfate 1.95 10 mg/kg 3.33 1.42 16 10-194 60 Endrin 3.09 10 mg/kg 3.33 ND 93 10-179 52 60 Fluoranthene 1.94 10 mg/kg 3.33 ND 58 10-165 60 Fluorene 2.01 10 mg/kg 3.33 ND 60 24-116 40 mailing location P(951)653-3351 CA ELAP No. 2698 P.O.Box 432 6100 Quail Valley Court F(951)653-1662 EPA No. CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No. OR4035 LACSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 21 of 24 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2113807 Santa Paula, CA 93060 Work Order Number: ClJ0519 Report Date: 19-Oct-2021 Received on Ice(Y/N): Yes Temp: 8 °C Semivolatile Organic Compounds by EPA 8270C- Batch Quality Control Spike Source %REC RPD Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch 1J12123-EPA 3545 Mod-Pressurized Fluid Extracton Matrix Spike Dup(1J12123-MSD1) Source:ClJ0519-01 Prepared: 10/12/21 Analyzed: 10/13/21 Heptachlor 7.82 10 mg/kg 3.33 ND NR 10-131 37 60 Wint Heptachlor Epoxide 1.99 10 mg/kg 3.33 ND 60 21-124 60 Hexachlorobenzene 1.85 10 mg/kg 3.33 ND 56 20-123 60 Hexachlorobutadiene 1.58 10 mg/kg 3.33 ND 47 10-98 60 Hexachlorocyclopentadiene ND 500 mg/kg 3.33 ND 10-93 60 Wint Hexachloroethane 0.440 10 mg/kg 3.33 ND 13 10-86 60 Indeno(1,2,3-cd)pyrene 1.75 10 mg/kg 3.33 ND 53 19-121 60 Isophorone 2.07 10 mg/kg 3.33 0.327 52 15-105 40 Naphthalene 1.43 10 mg/kg 3.33 ND 43 10-104 60 Nitrobenzene 1.58 10 mg/kg 3.33 ND 47 10-103 60 N-Nitrosodi-n-propylamine 1.77 10 mg/kg 3.33 ND 53 10-105 40 N-Nitrosodimethylamine 0.500 10 mg/kg 3.33 ND 15 10-87 60 N-Nitrosodiphenylamine 3.74 10 mg/kg 6.67 ND 56 10-200 60 Pentachlorophenol 2.35 100 mg/kg 3.33 0.533 54 10-200 40 Phenanthrene 1.95 10 mg/kg 3.33 ND 58 26-121 60 Phenol 1.51 10 mg/kg 3.33 0.113 42 11-108 40 Pyrene 2.92 10 mg/kg 3.33 ND 88 10-155 40 y-BHC 1.73 10 mg/kg 3.33 0.260 44 16-121 60 Surrogate: 2.0 mg/kg 2.50 79 10-122 2,4,6-Tribromophenol Surrogate:2-Fluorobiphenyl 0.81 mg/kg 1.67 49 10-109 Surrogate:2-Fluorophenol 0.81 mg/kg 2.50 32 10-96 Surrogate:4-Terphenyl-d14 1.3 mg/kg 1.67 78 14-126 Surrogate:Nitrobenzene-d5 0.81 mg/kg 1.67 48 10-106 Surrogate:Phenol-d6 1.2 mg/kg 2.50 47 10-103 mailing location P(951)653-3351 CA ELAP No. 2698 P.O.Box 432 6100 Quail Valley Court F(951)653-1662 EPA No. CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No. OR4035 LACSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 22 of 24 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2113807 Santa Paula, CA 93060 Work Order Number: ClJ0519 Report Date: 19-Oct-2021 Received on Ice(Y/N): Yes Temp: 8 °C Notes and Definitions N_RLm Due to sample matrix,the reporting limit has been raised. NCALlm Calibration Verification recovery was below the method control limits for this analyte due to matrix interference carried over from analytical samples. NCALInd Calibration Verification recovery was below the method control limit for this analyte. An additional check standard was analyzed at the reporting limit to ensure instrument sensitivity. Samples ND. NMint Due to matrix interference,the matrix spike and/or matrix spike duplicate performed on this sample did not meet laboratory acceptance criteria. QMint Due to matrix interference,the MS and/or MSD did not meet laboratory acceptance criteria. QMoRo MSD recovery and the MS/MSD RPD value did not meet laboratory acceptance criteria. QRPDo The RPD value for the sample duplicate or MS/MSD did not meet laboratory acceptance criteria. ND: Analyte NOT DETECTED at or above the Method Detection Limit (if MDL is reported), otherwise at or above the Reportable Detection Limit(RDL) NR: Not Reported RDL: Reportable Detection Limit MDL: Method Detection Limit */(Non-NELAP): NELAP does not offer accreditation for this analyte/method/matrix combination mailing location P(951)653-3351 CA ELAP No. 2698 P.O.Box 432 6100 Quail Valley Court F(951)653-1662 EPA No. CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No. OR4035 LACSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 23 of 24 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2113807 Santa Paula, CA 93060 Work Order Number: C1J0519 Report Date: 19-Oct-2021 Received on Ice(Y/N): Yes Temp: 8 °C Approval Enclosed are the analytical results for the submitted sample(s). Babcock Laboratories certify the data presented as part of this report meet the minimum quality standards in the referenced analytical methods.Any exceptions have been noted. V� Cindy A.Waddell cc: e-Standard_No Alias.rpt This report applies only to the sample(s)analyzed.As a mutual protection to clients,the public,and Babcock Laboratories,Inc.,this report is submitted and accepted for the exclusive use of the Client to whom it is addressed.Interpretation and use of the information contained within this report are the sole responsibility of the Client.Babcock Laboratories,Inc.is not responsible for any misinformation or consequences that may result from misinterpretation or improper use of this report.This report is not to be modified or abbreviated in any way. Additionally,this report is not to be used,in whole or in part,in any advertising or publicity matter without written authorization from Babcock Laboratories,Inc.The liability of Babcock Laboratories,Inc.is limited to the actual cost of the requested analyses,unless otherwise agreed upon in writing.There is no other warranty expressed or implied. mailing location P(951)653-3351 CA ELAP No. 2698 P.O.Box 432 6100 Quail Valley Court F(951)653-1662 EPA No. CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No. OR4035 LACSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 24 of 24 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2113807 Santa Paula, CA 93060 Work Order Number: C1J0519 Report Date: 19-Oct-2021 Received on Ice(Y/N): Yes Temp: 8 °C FU CHAIN OF CUSTODY Subcontract to AND ANALYSES PEQUE5 f FORAI Babcock Laboratories,Inc. Chain of Custody wonnation Sample information lest Descdptionfs) Lab Nu4er. Client: FruiL Ulowery Lab(pralury Addre✓;.s: 653 Corpuration St. Santa Paula,CA 93660-MUD s4 G9 4 phvl e; - Prrljeet: SP 2113807 ? p z v o 0n Ice Purrhase Order: 4 a U u Ui o SBfnpl SlnieC 5arnpler(s): OPS(LDJV IfV � ° 4 � Ill a o L TA( ` ti c W Lomposito-Setup Date: Time: STnp Imaaticr.b0cripw. Daly 71me Fa fA R o] ti Norm eawg:eJ SampteA 5 WtiV-ill Centrififge Gake V$29i'A'21 Up;UU U 1Vw 1 CIJol9 Rcd:10;051202113,02 Oil it H Remarks �lfi nea nme 3ew9uubea n„Ir aee upuayusaea ❑nlii T— iD � �'•�U �t,S 6y 1 psawed � LJ- Ftece'.rPd A: E�1.�1/�tTw:e flecei>� . Date �I'�� r+ I ` Corporate OHiWe&Laboralary Of l-&L 6omlery 4Nies&Lalwrdtary 4fnce&Lalloralwy afllce a Lahamtory Pf3 Curplm�6m:sl:rn:i 25CU SlaaeCo9ch A�,d sas a LndC A19nua 3442 Fniprr.--naive,Suita p 941:W.GoshL a�unu�, Santa I'eala,CA M69 rr-klon LA 9021C CFJCo,CA W37f3 Sdr LLJs Obispo,CA M411 Vlsafla,CA 932 91 DEL I9015)392-2000 TFI IP9e)9-01e2 TL i53l7bYV3-52 8 I EL(It!rsVa3.29ac 7F.L.{569)731-9hl3 Fne PAX 1e S)Vh-17a i ns t-A;(:(aUH)392,2983 70(209}242•�423 n4k 1Ho/ FAX:19P5)782-29!;1 FAX:(559;•7348435 CA EIAP CemflmUm No 1373 !A ELAP C:rtinaalion hlo.1 3G: CA LEA'Cert'rf .tiur Nu 2e76 CA LLAP Cert1001101 No.2775 CA FLAP CaMIMW NO.P310 mailing location P(951)653-3351 CA ELAP No. 2698 P.O.Box 432 6100 Quail Valley Court F(951)653-1662 EPA No. CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No. OR4035 LACSD No. 10119 i SOUTH TAHOE PUBLIC UTILITY DISTRICT CHAIN OF -CUSTODY 'rJJJ',JSN!!J}}!IJ�Y�Yrf'JS%JSI.J•NJSffff�'•J fJ 4r Si SSSiSSrSSSSS�i:Sm'SSiiSSSSSS��SSi`SSi 71275Meadow oe Public Utility District o�' Lab Sent to: ;/Sl ;l;JJ.•♦Jrr;;,;,yS»..S:,.Sr�Sx;r;;;;;;;r; l;,;,s;;;; ,;; �;JS; S;;;;�$ ,, Turnaroun:7e Crest DriveLNr;;;r:,f.;,,,,r,, Sr; rfxJIx:XJJIJ:JJf.•rfx ♦ . r r ♦ x e Tahoe,CA 96150FG SarM, Standard 0)-543-6231 sy*''•`b ' '``t OFAX: 530-541-4296 It f K� � 24 Hr I��ii it iJY r J ri :P}Yrr'ix }}•r}}i}Y}i Yrrir}'ri;i: r::•"}iiiii'rli}}:•:<4f}'i.•}}'rv'rY � SJ /rrrrrSS$ J'r'S} xi:SS'i: rSvSr�SSSSSSSSSSSS'rS rirS'•5�`•'iir^ O L,� 1Q0 L 48 H r JJ.• !.• JJ.S•S${�♦Xrr.•' r'JIlJ J Ix,.•,lyJ lxNrJnJJJxrxrxrxrr.• r xrf:rlr.f X.•J•'JJ,I}Jf.L•JIJNJJlI•JJ.•♦!J lJlrJr: J�.M1I + 'r�/y'Ysrlr!♦r ! 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(q s � c 1 V�q97� UW -01 T--11 Riot 19q I q A6 191 9� WLO -0q -Fn4l 6Nell) q (0 rVA0 i�'Jje CA 41 Comments: Reli quished b : Received by: ❑ Report MTBE to 0.5 µg/L.Note any detection of MTBE z 0.2 µg/L ❑ Analyze Travel and Field Blanks only if VOCs detected in samples. Sig na Signature ❑ Use Calif State Write-On form to report results of Potable Water Wells Print A Print Company South Tahoe Public il• District Company }i�35;SiwS'rS3'irf}`; xx�Yr�s• }rx} }rr`rSS Jr} !}rfff'r�:�"rr�ff'.:G�x}fr<f'.^:f:.;•��•f'r}♦S!J�rYirN rr x�,,♦ J r,• , JSlxfi xx,!fS 1 jr N r rflJJ f`kN��JlJ%�J.�IISIJ!!J,f��! • rJ <'� ? .. . .. �.. �x..rr .,.♦sJ JxffSJJllfr.Y♦fxx f{lrfJxfS♦f Relinquishy IV Received Received intact Signature Signature IT Received cold Print Print Custody seals Company Company Date: Time Date: Time Correct container UAMFocroslChain of CWody.doc Page of • Subcontract to CHAIN OF CUSTODY Analytical Chcrilists AND ANALYSES REQUEST FARM Babcock Laboratories, Inc. Chain of Custody Information Sample Information Test Descrlption(s) Lab Number: Client: Fruit Growers Laboratory Address: 853 Corporation St. Santa Paula,CA 93060-3005 c� co Q Phone: Fax: co Contact: En cc a w Project: SP 2113807 co Q' aG o Purchase Order: 0 a g a z n cn w Sampler(s): OPS/LDA/KV a cn a) O o ^ 0 — CV G 0 co cc z o a Compositor Setup Date: Time: o in a �, Q c c P� v i"' `,1SaMP ,O Co Date 71me 'a) Nuum, Location Description Sampled Sampled X a N 5 WW-10 Centrifuge Cake 09/29/2021 00:00 G VAN 1 Remarks Relinquished Date Time Relinquished Date Time Relinquished Date Time Received By: Date Time Received By: Date Tune Received By: Date Time Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2776 CA ELAP Certification No.2810 FGL Environmental Doc ID: 2D0900157 SOP 17.DOC Revision Date: 10/09/14 Page: 1 of 1 Condition Upon Receipt (Attach to COC) Sample Receipt at SP: 1. Number of ice chests/packages received: 1 2• Shipper tracking numbers 7748-4614-7094 3.Were samples received in a chilled condition? Temps: 3 4.Surface water(SWTR)bact samples:A sample that has a temperature upon receipt of>10C,whether iced or not, should be flagged unless the time since sample collection has been less than two hours. 5. Do the number of bottles received agree with the Yes No N/A COC? 6.Verify sample date,time, sampler Yes No N/A 7.Were the samples received intact? (i.e. no broken Yes No bottles, leaks, etc.) 8.Were sample custody seals intact? Yes No N/A Sample Verification, Labeling and Distribution: 1.Were all requested analyses understood and Yes No acceptable? 2. Did bottle labels correspond with the client's ID's? Yes No 3.Were all bottles requiring sample preservation Yes No N/A FGL properly preserved? [Exception:Oil&Grease,VOA and CrVI verified in lab] 4.VOAs checked for Headspace? Yes No N/A 5.Were all analyses within holding times at time of Yes No receipt? 6. Have rush or project due dates been checked and Yes No N/A accepted? Include a copy of the COC for lab delivery. (Bacti. Inorganics and Radio) Sample Receipt, Login and Verification completed by: Reviewed and Digitally signed by Inez Covarrubias Inez Covarrubias Title:Sample Receiving Approved By Date:10/01/2021-14:08:16 Discrepency Documentation: Any items above which are"No"or do not meet specifications (i.e.temps)must be resolved. 1. Person Contacted: Phone Number: Initiated By: Date: Problem: Resolution: 2. Person Contacted: Phone Number: Initiated By: Date: Problem: Resolution: (2011369) South Tahoe Public Utility District SP 2113807 IV/CDA-10/01/2021-14:08:16 © © = BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: South Tahoe Public Utility District Analytical Report: Page 1 of 10 Contact: Dan Arce Project Name: WWTP Analysis-2021 Address: 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Project Number: EPA Priority Pollutants Report Date: 18-Mar-2021 Work Order Number: ClC0753 Received on Ice(Y/N): Yes Temp: 7 °C Attached is the analytical report for the sample(s) received for your project. Below is a list of the individual sample descriptions with the corresponding laboratory number(s). Also, enclosed is a copy of the Chain of Custody document(if received with your sample(s)). Please note any unused portion of the sample(s) may be responsibly discarded after 30 days from the above report date, unless you have requested otherwise. Thank you for the opportunity to serve your analytical needs. If you have any questions or concerns regarding this report please contact our client service department. Sample Identification Lab Sample# Client Sample ID Matrix Date Sampled By Date Submitted By C1 C0753-01 AG76338-WW-06 Raw Grab Liquid 03/02/21 17:16 OPS/LDA/BC 03/04/21 10:35 FedEx C1 C0753-02 AG76339-WW-05 Final Grab Liquid 03/02/21 17:13 OPS/LDA/BC 03/04/21 10:35 FedEx C1 C0753-03 AG76345-WW-10 Centrifuge Sludge 03/04/21 00:00 OPS/LDA/BC 03/04/21 10:35 FedEx Cake mailing location P 951 653 3351 CA ELAP No.2698 P.O Box 432 6100 Quail Valley Court F 951 653 1662 EPA No.CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No.OR4035 LACSD No. 10119 © © = BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: South Tahoe Public Utility District Analytical Report: Page 2 of 10 Contact: Dan Arce Project Name: WWTP Analysis-2021 Address: 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Project Number: EPA Priority Pollutants Report Date: 18-Mar-2021 Work Order Number: C1C0753 Received on Ice(Y/N): Yes Temp: 7 °C Laboratory Reference Number C1 C0753-01 Sample Description Matrix Sampled Date/Time Received Date/Time AG76338-WW-06 Raw Grab Liquid 03/02/21 17:16 03/04/21 10:35 Analyte(s) Result RDL Units Method Analysis Date Analyst Flag Volatile Organic Compounds by EPA 8260E 1,1,1,2-Tetrachloroethane ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES 1,1,1-Trichloroethane ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES 1,1,2,2-Tetrachloroethane ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES 1,1,2-Trichloroethane ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES 1,1-Dichloroethane ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES 1,1-Dichloroethene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES 1,1-Dichloropropene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES 1,2,3-Trichlorobenzene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES 1,2,3-Trichloropropane ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES 1,2,4-Trichlorobenzene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES 1,2,4-Trimethylbenzene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES 1,2-Dichlorobenzene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES 1,2-Dichloroethane ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES 1,2-Dichloropropane ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES 1,3,5-Trimethylbenzene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES 1,3-Dichlorobenzene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES 1,3-Dichloropropane ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES 1,4-Dichlorobenzene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES 2,2-Dichloropropane ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES 2-Butanone(MEK) ND 30 ug/L EPA 8260B 03/12/21 21:17 JES 2-Chlorotoluene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES 4-Chlorotoluene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES 4-Methyl-2-Pentanone(MIBK) ND 50 ug/L EPA 8260B 03/12/21 21:17 JES Acrolein ND 100 ug/L EPA 8260B 03/12/21 21:17 JES Acrylonitrile ND 100 ug/L EPA 8260B 03/12/21 21:17 JES Benzene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES Bromobenzene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES Bromochloromethane ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES Bromodichloromethane ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES Bromoform ND 10 ug/L EPA 8260B 03/12/21 21:17 JES Bromomethane ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES Carbon Tetrachloride ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES Chlorobenzene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES mailing location P 951 653 3351 CA ELAP No.2698 P.O Box 432 6100 Quail Valley Court F 951 653 1662 EPA No.CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No.OR4035 LACSD No.10119 © © = BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: South Tahoe Public Utility District Analytical Report: Page 3 of 10 Contact: Dan Arce Project Name: WWTP Analysis-2021 Address: 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Project Number: EPA Priority Pollutants Report Date: 18-Mar-2021 Work Order Number: C1C0753 Received on Ice(Y/N): Yes Temp: 7 °C Laboratory Reference Number C1 C0753-01 Sample Description Matrix Sampled Date/Time Received Date/Time AG76338-WW-06 Raw Grab Liquid 03/02/21 17:16 03/04/21 10:35 Analyte(s) Result RDL Units Method Analysis Date Analyst Flag Volatile Organic Compounds by EPA 8260E Chloroethane ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES Chloroform ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES Chloromethane ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES cis-1,2-Dichloroethene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES cis-1,3-Dichloropropene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES Dibromochloromethane ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES Dibromomethane ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES Dichlorodifluoromethane ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES Ethylbenzene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES Hexachlorobutadiene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES I sopropyl benzene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES Methyl tert Butyl Ether ND 50 ug/L EPA 8260B 03/12/21 21:17 JES Methylene Chloride ND 30 ug/L EPA 8260B 03/12/21 21:17 JES Naphthalene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES n-Butylbenzene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES n-Propylbenzene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES sec-Butyl benzene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES Styrene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES tert-Butylbenzene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES Tetrachloroethene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES Toluene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES trans-1,2-Dichloroethene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES trans-1,3-Dichloropropene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES Trichloroethene ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES Trichlorofluoromethane ND 50 ug/L EPA 8260B 03/12/21 21:17 JES Vinyl Chloride ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES Xylenes(m+p) ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES Xylenes(ortho) ND 5.0 ug/L EPA 8260B 03/12/21 21:17 JES Surrogate:1,2-Dichloroethane-d4 102% 80-120 EPA 8260B 03/12/21 21:17 JES Surrogate:4-Bromofluorobenzene 98% 80-120 EPA 8260B 03/12/21 21:17 JES Surrogate:Toluene-d8 98% 80-120 EPA 8260B 03/12/21 21:17 JES Surrogate:1,2-Dichlorobenzene-d4 103% 0-200 EPA 8260B 03/12/21 21:17 JES mailing location P 951 653 3351 CA ELAP No.2698 P.O Box 432 6100 Quail Valley Court F 951 653 1662 EPA No.CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No.OR4035 LACSD No.10119 © © = BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: South Tahoe Public Utility District Analytical Report: Page 4 of 10 Contact: Dan Arce Project Name: WWTP Analysis-2021 Address: 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Project Number: EPA Priority Pollutants Report Date: 18-Mar-2021 Work Order Number: C1C0753 Received on Ice(Y/N): Yes Temp: 7 °C Laboratory Reference Number C1 C0753-02 Sample Description Matrix Sampled Date/Time Received Date/Time AG76339-WW-05 Final Grab Liquid 03/02/21 17:13 03/04/21 10:35 Analyte(s) Result RDL Units Method Analysis Date Analyst Flag Volatile Organic Compounds by EPA 8260E 1,1,1,2-Tetrachloroethane ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES 1,1,1-Trichloroethane ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES 1,1,2,2-Tetrachloroethane ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES 1,1,2-Trichloroethane ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES 1,1-Dichloroethane ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES 1,1-Dichloroethene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES 1,1-Dichloropropene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES 1,2,3-Trichlorobenzene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES 1,2,3-Trichloropropane ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES 1,2,4-Trichlorobenzene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES 1,2,4-Trimethylbenzene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES 1,2-Dichlorobenzene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES 1,2-Dichloroethane ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES 1,2-Dichloropropane ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES 1,3,5-Trimethylbenzene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES 1,3-Dichlorobenzene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES 1,3-Dichloropropane ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES 1,4-Dichlorobenzene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES 2,2-Dichloropropane ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES 2-Butanone(MEK) ND 3.0 ug/L EPA 8260B 03/12/21 15:11 JES 2-Chlorotoluene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES 4-Chlorotoluene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES 4-Methyl-2-Pentanone(MIBK) ND 5.0 ug/L EPA 8260B 03/12/21 15:11 JES Acrolein ND 10 ug/L EPA 8260B 03/12/21 15:11 JES Acrylonitrile ND 10 ug/L EPA 8260B 03/12/21 15:11 JES Benzene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES Bromobenzene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES Bromochloromethane ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES Bromodichloromethane ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES Bromoform ND 1.0 ug/L EPA 8260B 03/12/21 15:11 JES Bromomethane ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES Carbon Tetrachloride ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES Chlorobenzene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES mailing location P 951 653 3351 CA ELAP No.2698 P.O Box 432 6100 Quail Valley Court F 951 653 1662 EPA No.CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No.OR4035 LACSD No.10119 © © = BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: South Tahoe Public Utility District Analytical Report: Page 5 of 10 Contact: Dan Arce Project Name: WWTP Analysis-2021 Address: 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Project Number: EPA Priority Pollutants Report Date: 18-Mar-2021 Work Order Number: C1C0753 Received on Ice(Y/N): Yes Temp: 7 °C Laboratory Reference Number C1 C0753-02 Sample Description Matrix Sampled Date/Time Received Date/Time AG76339-WW-05 Final Grab Liquid 03/02/21 17:13 03/04/21 10:35 Analyte(s) Result RDL Units Method Analysis Date Analyst Flag Volatile Organic Compounds by EPA 8260E Chloroethane ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES Chloroform 0.86 0.50 ug/L EPA 8260B 03/12/21 15:11 JES Chloromethane ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES cis-1,2-Dichloroethene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES cis-1,3-Dichloropropene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES Dibromochloromethane ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES Dibromomethane ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES Dichlorodifluoromethane ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES Ethylbenzene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES Hexachlorobutadiene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES I sopropyl benzene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES Methyl tert Butyl Ether ND 5.0 ug/L EPA 8260B 03/12/21 15:11 JES Methylene Chloride ND 3.0 ug/L EPA 8260B 03/12/21 15:11 JES Naphthalene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES n-Butylbenzene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES n-Propylbenzene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES sec-Butyl benzene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES Styrene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES tert-Butylbenzene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES Tetrachloroethene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES Toluene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES trans-1,2-Dichloroethene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES trans-1,3-Dichloropropene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES Trichloroethene ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES Trichlorofluoromethane ND 5.0 ug/L EPA 8260B 03/12/21 15:11 JES Vinyl Chloride ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES Xylenes(m+p) ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES Xylenes(ortho) ND 0.50 ug/L EPA 8260B 03/12/21 15:11 JES Surrogate:1,2-Dichloroethane-d4 104% 80-120 EPA 8260B 03/12/21 15:11 JES Surrogate:4-Bromofluorobenzene 103% 80-120 EPA 8260B 03/12/21 15:11 JES Surrogate:Toluene-d8 98% 80-120 EPA 8260B 03/12/21 15:11 JES Surrogate:1,2-Dichlorobenzene-d4 104% 0-200 EPA 8260B 03/12/21 15:11 JES mailing location P 951 653 3351 CA ELAP No.2698 P.O Box 432 6100 Quail Valley Court F 951 653 1662 EPA No.CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No.OR4035 LACSD No.10119 © © = BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: South Tahoe Public Utility District Analytical Report: Page 6 of 10 Contact: Dan Arce Project Name: WWTP Analysis-2021 Address: 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Project Number: EPA Priority Pollutants Report Date: 18-Mar-2021 Work Order Number: C1C0753 Received on Ice(Y/N): Yes Temp: 7 °C Laboratory Reference Number C1 C0753-03 Sample Description Matrix Sampled Date/Time Received Date/Time AG76345-WW-10 Centrifuge Cake Sludqe 03/04/21 00:00 03/04/21 10:35 Analyte(s) Result RDL Units Method Analysis Date Analyst Flag Solids Total Solids 23 0.10 % SM 254OG 03/08/21 16:59 DFL Volatile Organic Compounds by EPA 8260E 1,1,1,2-Tetrachloroethane ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC 1,1,1-Trichloroethane ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC 1,1,2,2-Tetrachloroethane ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC 1,1,2-Trichloroethane ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC 1,1-Dichloroethane ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC NLOhND 1,1-Dichloroethene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC 1,1-Dichloropropene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC 1,2,3-Trichlorobenzene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC 1,2,3-Trichloropropane ND 880 ug/kg dry EPA 8260B 03/08/21 22:02 EEC 1,2,4-Trichlorobenzene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC 1,2,4-Trimethylbenzene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC 1,2-Dichlorobenzene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC 1,2-Dichloroethane ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC 1,2-Dichloropropane ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC 1,3,5-Trimethylbenzene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC 1,3-Dichlorobenzene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC 1,3-Dichloropropane ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC 1,4-Dichlorobenzene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC 2,2-Dichloropropane ND 660 ug/kg dry EPA 8260B 03/08/21 22:02 EEC 2-Butanone(MEK) 160000 880 ug/kg dry EPA 8260B 03/13/21 01:05 JES 2-Chlorotoluene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC 4-Chlorotoluene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC 4-Methyl-2-Pentanone(MIBK) ND 4400 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Acetone 210000 1800 ug/kg dry EPA 8260B 03/13/21 01:05 JES Acrylonitrile ND 8800 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Benzene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Bromobenzene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Bromochloromethane ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Bromodichloromethane ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Bromoform ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC NRPDb Bromomethane ND 2200 ug/kg dry EPA 8260B 03/08/21 22:02 EEC mailing location P 951 653 3351 CA ELAP No.2698 P.O Box 432 6100 Quail Valley Court F 951 653 1662 EPA No.CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No.OR4035 LACSD No.10119 © © = BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: South Tahoe Public Utility District Analytical Report: Page 7 of 10 Contact: Dan Arce Project Name: WWTP Analysis-2021 Address: 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Project Number: EPA Priority Pollutants Report Date: 18-Mar-2021 Work Order Number: C1C0753 Received on Ice(Y/N): Yes Temp: 7 °C Laboratory Reference Number C1 C0753-03 Sample Description Matrix Sampled Date/Time Received Date/Time AG76345-WW-10 Centrifuge Cake Sludqe 03/04/21 00:00 03/04/21 10:35 Analyte(s) Result RDL Units Method Analysis Date Analyst Flag Volatile Organic Compounds by EPA 8260E Carbon Tetrachloride ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Chlorobenzene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Chloroethane ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Chloroform ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Chloromethane ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC cis-1,2-Dichloroethene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC cis-1,3-Dichloropropene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Dibromochloromethane ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Dibromochloropropane ND 4400 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Dibromomethane ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Dichlorodifluoromethane ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Ethylbenzene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Hexachlorobutadiene ND 1300 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Methyl tert Butyl Ether ND 4400 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Methylene Chloride ND 2600 ug/kg dry EPA 8260B 03/08/21 22:02 EEC n-Butylbenzene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC n-Propylbenzene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Naphthalene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC sec-Butyl benzene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Styrene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC tert-Butylbenzene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Tetrachloroethene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Toluene 980 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC trans-1,2-Dichloroethene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC trans-1,3-Dichloropropene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Trichloroethene ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Trichlorofluoromethane ND 4400 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Vinyl Chloride ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Xylenes(m+p) ND 880 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Xylenes(ortho) ND 440 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Xylenes(total) ND 880 ug/kg dry EPA 8260B 03/08/21 22:02 EEC Surrogate:1,2-Dichloroethane-d4 98% 74-126 EPA 8260B 03/13/21 01:05 JES Surrogate:1,2-Dichloroethane-d4 99% 74-126 EPA 8260B 03/08/21 22:02 EEC mailing location P 951 653 3351 CA ELAP No.2698 P.O Box 432 6100 Quail Valley Court F 951 653 1662 EPA No.CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No.OR4035 LACSD No.10119 © © = BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: South Tahoe Public Utility District Analytical Report: Page 8 of 10 Contact: Dan Arce Project Name: WWTP Analysis-2021 Address: 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Project Number: EPA Priority Pollutants Report Date: 18-Mar-2021 Work Order Number: C1C0753 Received on Ice(Y/N): Yes Temp: 7 °C Laboratory Reference Number C1 C0753-03 Sample Description Matrix Sampled Date/Time Received Date/Time AG76345-WW-10 Centrifuge Cake Sludqe 03/04/21 00:00 03/04/21 10:35 Analyte(s) Result RDL Units Method Analysis Date Analyst Flag Volatile Organic Compounds by EPA 8260E Surrogate:4-Bromofluorobenzene 86% 76-127 EPA 8260B 03/13/21 01:05 JES Surrogate:4-eromofluorobenzene 87% 76-127 EPA 8260B 03/08/21 22:02 EEC Surrogate:Toluene-d8 96% 80-120 EPA 8260B 03/08/21 22:02 EEC Surrogate:Toluene-d8 100% 80-120 EPA 8260B 03/13/21 01:05 JES Surrogate:1,2-Dichlorobenzene-d4 108% 0-200 EPA 8260B 03/13/21 01:05 JES Surrogate:1,2-Dichlorobenzene-d4 128% 0-200 EPA 8260B 03/08/21 22:02 EEC mailing location P 951 653 3351 CA ELAP No.2698 P.O Box 432 6100 Quail Valley Court F 951 653 1662 EPA No.CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No.OR4035 LACSD No.10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: South Tahoe Public Utility District Analytical Report: Page 9 of 10 Contact: Dan Arce Project Name: WWTP Analysis-2021 Address: 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Project Number: EPA Priority Pollutants Report Date: 18-Mar-2021 Work Order Number: C1C0753 Received on Ice(Y/N): Yes Temp: 7 °C Notes and Definitions NLOhND LCS recovery was above method control limit for this analyte. Analyte not detected,therefore data not impacted. NRPDb This analyte's RPD value for the LCS/LCSD did not meet laboratory acceptance criteria. The data was accepted based on valid RPD of the remaining analyte(s). ND: Analyte NOT DETECTED at or above the Method Detection Limit (if MDL is reported), otherwise at or above the Reportable Detection Limit(RDL) NR: Not Reported RDL: Reportable Detection Limit MDL: Method Detection Limit */°I : NELAP does not offer accreditation for this analyte/method/matrix combination Approval Enclosed are the analytical results for the submitted sample(s). Babcock Laboratories certify the data presented as part of this report meet the minimum quality standards in the referenced analytical methods.Any exceptions have been noted. Shelia Marie McGlown cc: e-Short_No Alias.rpt This report applies only to the sample(s)analyzed.As a mutual protection to clients,the public,and Babcock Laboratories,Inc.,this report is submitted and accepted for the exclusive use of the Client to whom it is addressed.Interpretation and use of the information contained within this report are the sole responsibility of the Client.Babcock Laboratories,Inc.is not responsible for any misinformation or consequences that may result from misinterpretation or improper use of this report.This report is not to be modified or abbreviated in any way. Additionally,this report is not to be used,in whole or in part,in any advertising or publicity matter without written authorization from Babcock Laboratories,Inc.The liability of Babcock Laboratories,Inc.is limited to the actual cost of the requested analyses,unless otherwise agreed upon in writing.There is no other warranty expressed or implied. mailing location P 951 653 3351 CA ELAP No.2698 P.O Box 432 6100 Quail Valley Court F 951 653 1662 EPA No.CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No.OR4035 LACSD No.10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Over 100 Years Client Name: South Tahoe Public Utility District Analytical Report: Page 10 of 10 Contact: Dan Arce Project Name: WWTP Analysis-2021 Address: 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Project Number: EPA Priority Pollutants Report Date: 18-Mar-2021 Work Order Number: C1C0753 Received on Ice(Y/N): Yes Temp: 7 °C SOUTH TAHOE PUBLIC UTILITY DISTRICT CHAIN OF CUSTODY South Tahoe Public Utility District LabSentto: 1275 Meadow Crest Drive < Tit r•fir. > Turnaround Time South Lake Tahoe,CA 96150 't'F Phone:(530)-543-6231 e, Samplern Standard FAX: 530-541.4296 24 Hr 49(ir e d» Prior,'N RUlYdl u m Ot r r.R PH' F6%33$ W-00 80w Grab Y 03,01214w Hof. W 13 A 3 T Groh 1J13 Hol WW V1 3 A6 GM5 W W-I OMMifuctS Cake 8hr 14°G �- Rc'd: 0310412021 10.35 0 �a. yample�lntaCt u. III]III] SNL Comments' Rellnqulshed by: Received by: ❑ ReportMTBE to 0.5 µg1L.Note any detection of MTBE z 0.2 µg�L ❑ Analyze Havel and Field Blanks only If VOCs detected ir.samples. slgnatu -� Signature FfdX n Use Calif State Write-4n farm W repert results of Potable Water Wells Pdnt _ U;n ��(�� Print edE% Company South Tahoe Public Litility oistnct Company % Please Return all STPUD Ice chests&Blue Ice. [)ate: 0-_31 Timed Cate ygyk?I Time 1a31- 4i w' �oeat, J *< <. Relinquished by: Received by, Received intact m 1 Ignature yeAiJ Signature /� Received cold Put PtAd Print I40 FMW n t6 FM Custody seals wig Company rtduCompany , , Correct container Y Date: LI _ TimeJp_;_��_ Date; q7J TmeJQi_,. r uav amswnanaicr�rcdr.aoc Page B of 1 mailing location P 951 653 3351 CA ELAP No.2698 P.O Box 432 6100 Quail Valley Court F 951 653 1662 EPA No.CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No.OR4035 LACSD No. 10119 HEAVENLY VALLEY CREEK EMERGENCY RETENTION BASIN And HEAVENLY VALLEY CREEK MONITORING Monthly monitoring of Heavenly Valley Creek and the monitoring wells were performed throughout 2021. Heavenly Valley Creek is the natural drainage of the areas in which the Emergency Retention Basin (ERB) and Ponds #1 and #2 are located. The monitoring results for Heavenly Valley Creek and treatment plant monitoring wells are tabulated below. Each site is reported with tables showing the monthly results for 2021 and the yearly averages since monitoring was initiated. Monitoring wells for buried sludge was initiated in 1992. The monthly results for 2021 are reported. ERB Well MW-11 was not sampled in the fourth quarter of 2021 because the well casing was filled with mud. We are working on rehabilitating this monitoring well. r .� w n i�'f a rr.', f- ,. i �,4 rw ,�ykk..��r•'"� .��t~_�'� {''l.V„ .#4�_ �i 4�i�� 41'f 4 + .�. �k` Y 111 t -1 r K.ro *� �"4'�'�*f * -1-.�•'i��. , •�� }. �i { r -:I{ , 'M �. } �/:� ��* , {M�:+ � .fit a7 •� � _ '� `� # `lam« *F,��' �}�rr}�, w_�f� t 'i � '� {+,�:� •^.1+�}*.r�}+ 4#'� T * qOt ` lS •5 f•# ko }S* �h `'{ • ' ik w �I `�` ► ;rF rrnage201 '��9ikai`Clo4e .�, 4rfanin-'#Cf - t,20'0 Upog le •�#�, YfL -` '.� CmBaeiy D&te';Nov 1, 2007 lak 38.919MP' Ion -119 965388' elev 6331 it Eye alk 9853".t Site: HVC-1 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/11/2022 WATER QUALITY DATA Below Pioneer Trail HEAVENLY VALLLEY CREEK Temp EC Chloride COD TKN NO3-N Date C pH umhos mg/L mg/L mg/L mg/L Note 01/26/2021 No Flow 02/24/2021 1.5 7.03 83.4 1.41 0.13 0.194 03/25/2021 2.4 7.37 80.8 1.27 0.210 0.149 04/27/2021 5.2 7.46 53.5 1.14 0.074 0.031 05/18/2021 9.7 7.03 36.0 1.12 0.081 <0.010 06/29/2021 16.4 7.68 44.8 1.08 0.079 0.024 07/21/2021 No Flow 08/31/2021 No Flow 09/14/2021 No Flow 10/28/2021 4.8 7.63 90.0 2.25 0.193 <0.010 11/24/2021 2.0 7.31 79.8 1.54 0.067 0.055 12/29/2021 No Flow Maximum 16.4 7.68 90.0 2.250 0.21 0.194 Minimum 1.5 7.03 36.0 1.080 0.050 <0.010 Average 6.0 7.36 66.9 1.40 0.119 0.068 #Tests 7 7 7 7 0 7 7 Temp pH EC Chloride COD TKN NO3-N Year C umhos mg/L mg/L mg/L mg/L Comments 1984 4.0 7.30 43.0 0.90 5.0 0.110 1985 3.7 7.39 50.0 1.30 6.0 0.180 1986 4.1 7.18 42.0 1.00 8.0 0.130 1987 4.7 6.70 77.0 5.50 5.0 0.200 1988 1.9 6.99 80.0 5.10 5.0 0.330 1989 4.8 7.14 59.0 1.50 6.0 0.150 1990 5.0 7.46 75.3 2.09 6.8 0.209 1991 5.6 7.34 84.9 2.44 6.3 0.153 1992 3.4 7.49 75.8 2.30 13.0 0.146 1993 5.5 7.25 57.8 1.67 9.1 0.120 0.093 1994 4.4 7.54 66.9 2.10 10.6 0.600 0.098 1995 5.1 6.80 55.8 1.85 10.6 0.335 0.085 1996 5.6 7.30 49.0 1.10 6.0 0.234 0.050 1997 6.1 7.25 42.0 0.90 6.0 0.294 0.070 1998 4.9 6.90 44.0 1.00 5.0 0.203 0.050 1999 5.2 6.97 43.7 0.99 5.3 0.218 0.079 2000 5.1 7.33 47.5 0.91 5.0 0.194 0.063 2001 6.3 7.30 56.6 1.39 5.5 0.147 0.113 2002 7.3 6.88 55.4 1.61 5.9 0.163 0.066 2003 6.7 7.12 58.1 2.75 10.4 0.199 0.099 2004 5.3 7.15 58.5 1.60 6.8 0.279 0.082 2005 5.3 7.29 50.6 1.50 13.3 0.209 0.073 2006 4.9 7.18 47.4 1.00 8.9 0.116 0.040 2007 6.1 7.12 57.8 1.40 11.2 0.148 0.077 2008 6.4 7.09 57.2 1.40 7.5 0.089 0.083 2009 5.5 7.20 56.0 1.50 14.6 0.145 0.070 2010 4.7 7.26 56.9 1.60 7.9 0.116 0.083 2011 4.7 7.16 49.2 0.90 8.7 0.179 0.038 2012 6.1 7.27 61.6 1.20 0.067 0.068 2013 5.8 7.33 66.6 1.40 0.090 0.124 2014 6.0 7.24 65.7 1.60 0.066 0.131 2015 6.4 7.42 70.0 1.60 0.130 0.088 2016 7.1 7.09 61.4 2.80 0.129 0.063 2017 6.7 7.15 48.1 0.80 0.153 0.022 2018 6.3 7.06 55.9 0.90 0.587 0.037 2019 5.6 6.92 47.1 1.40 0.094 0.028 2020 6.1 7.17 58.3 0.90 0.165 0.062 2021 6.0 7.36 66.9 1.40 0.119 0.068 Maximum 7.3 7.54 84.9 5.50 14.6 0.600 0.330 Minimum 1.9 6.70 42.0 0.80 5.0 0.066 0.022 Average 5.4 7.19 57.9 1.67 7.8 0.193 0.098 #Years 38 38 38 38 28 29 38 Site: HVC-2 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/11/2022 WATER QUALITY DATA Upstream STPUD HEAVENLY VALLLEY CREEK Temp EC Chloride COD TKN NO3-N Date C pH umhos mg/L mg/L mg/L mg/L Note 01/26/2021 No Flow 02/24/2021 No Flow 03/25/2021 3.0 6.29 51.8 1.57 0.391 0.013 04/27/2021 7.5 6.37 65.7 1.83 0.201 <0.010 05/18/2021 16.1 7.08 36.5 1.62 0.403 <0.010 06/29/2021 No Flow 07/21/2021 No Flow 08/31/2021 No Flow 09/14/2021 No Flow 10/28/2021 No Flow 11/24/2021 No Flow 12/29/2021 No Flow Maximum 16.1 7.08 65.7 1.83 0.0 0.4 0.013 Minimum 3.0 6.29 36.5 1.570 0.0 0.20 <0.010 Average 8.9 6.58 51.3 1.67 0.332 0.011 #Tests 3 3 3 3 0 3 3 Temp pH EC Chloride COD TKN NO3-N Year C umhos mg/L mg/L mg/L mg/L Comments 1984 4.5 7.07 44.0 1.40 6.0 0.090 1985 3.2 7.13 47.0 1.30 7.0 0.110 1986 3.3 6.75 43.0 1.60 19.0 0.170 1987 3.9 7.10 47.0 1.40 7.0 0.090 1988 0.9 6.67 56.0 2.50 7.0 0.070 1989 4.2 6.95 64.7 2.74 24.0 0.220 1990 5.2 6.89 63.2 3.14 24.6 0.064 1991 10.6 6.79 56.8 4.30 21.0 0.075 1992 No flow for entire year 1993 6.5 7.04 56.8 2.95 20.5 0.480 0.301 1994 3.9 7.11 68.7 2.52 15.3 0.057 1995 5.6 6.33 46.9 2.05 11.2 0.378 0.056 1996 6.2 6.92 47.0 1.50 12.0 0.386 0.020 1997 6.9 7.12 49.0 1.70 4.0 0.290 0.020 1998 5.1 6.78 48.0 1.50 6.0 0.277 0.010 1999 6.1 6.72 47.9 1.14 5.6 0.239 0.020 2000 4.3 7.05 47.2 1.32 7.4 0.255 0.033 2001 5.3 6.97 51.6 1.78 7.6 0.265 0.015 2002 8.7 6.91 53.3 2.86 13.9 0.258 0.016 2003 10.2 6.73 59.5 4.12 20.6 0.377 0.056 2004 7.1 6.89 38.0 1.49 8.4 0.272 0.026 2005 6.6 6.78 41.4 1.53 21.8 0.504 0.043 2006 4.9 6.96 47.6 1.44 13.3 0.158 0.015 2007 4.6 7.04 49.2 1.39 10.1 0.156 0.019 2008 6.8 6.88 45.2 1.74 10.0 0.180 0.032 2009 6.4 6.72 41.1 1.63 16.3 0.328 0.014 2010 5.7 7.05 47.7 2.13 15.9 0.230 0.083 2011 5.2 6.74 49.2 1.13 15.2 0.143 0.018 2012 5.9 6.72 53.7 2.32 0.216 0.017 2013 5.7 6.67 53.9 2.83 0.168 0.026 2014 6.5 6.43 56.7 3.75 0.377 0.073 2015 8.7 6.65 42.2 1.38 0.404 0.197 2016 7.3 6.26 75.9 4.19 0.342 0.025 2017 7.6 6.66 46.2 1.41 0.192 0.015 2018 6.5 6.70 54.1 1.29 0.363 0.015 2019 6.5 6.38 47.1 1.47 0.214 0.014 2020 8.9 6.52 54.3 1.29 0.440 0.013 2021 8.9 6.58 51.3 1.67 0.332 0.011 Maximum 10.6 7.13 75.9 4.30 24.6 0.504 0.301 Minimum 0.9 6.26 38.0 1.13 4.0 0.143 0.010 Average 6.1 6.80 51.1 2.05 13.0 0.294 0.058 #Years 37 37 37 37 27 28 37 Site: HVC-3 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/11/2022 WATER QUALITY DATA Below Meadow Crest Dr HEAVENLY VALLLEY CREEK Temp EC Chloride COD TKN NO3-N Date C pH umhos mg/L mg/L mg/L mg/L Note 01/26/2021 No Flow 02/24/2021 No Flow 03/25/2021 2.1 5.99 74.4 6.30 0.350 <0.010 04/27/2021 No Flow 05/18/2021 No Flow 06/29/2021 No Flow 07/21/2021 No Flow 08/31/2021 No Flow 09/14/2021 No Flow 10/28/2021 5.9 6.24 80.0 7.75 0.525 <0.010 11/24/2021 No Flow 12/29/2021 No Flow Maximum 5.9 6.24 80.0 7.75 0.0 0.53 <0.010 Minimum 2.10 5.99 74.4 6.300 0.0 0.35 <0.010 Average 4.0 6.12 77.2 7.03 0.438 <0.010 #Tests 2 2 2 2 0 2 2 Temp pH EC Chloride COD TKN NO3-N Year C umhos mg/L mg/L mg/L mg/L Comments 1984 4.6 7.05 50.0 1.90 7.0 0.100 1985 3.4 7.16 84.0 3.80 9.0 0.190 1986 4.1 6.73 93.0 11.80 25.0 0.590 1987 3.9 6.94 96.0 5.10 16.0 0.170 1988 0.9 6.65 241.0 17.70 22.0 1.220 1989 4.8 7.01 152.0 12.40 38.1 0.320 1990 7.1 7.27 88.3 5.95 13.8 0.178 1991 7.5 6.90 161.7 12.18 15.5 0.165 1992 1.1 7.07 289.0 22.50 29.0 0.105 1993 6.0 7.08 88.8 4.20 21.8 0.770 0.247 1994 5.1 7.24 82.6 3.79 48.6 3.240 0.084 1995 5.5 7.11 70.8 3.90 9.4 0.487 0.128 1996 6.0 6.88 49.0 1.70 12.0 0.314 0.040 1997 6.6 7.05 51.0 1.80 4.0 0.290 0.020 1998 4.9 6.73 51.0 1.60 6.0 0.272 0.020 1999 5.5 6.81 50.7 1.37 5.6 0.255 0.018 2000 4.2 7.07 50.8 1.51 7.2 0.322 0.038 2001 7.3 6.66 63.3 2.34 7.0 0.334 0.011 2002 7.3 6.96 76.6 3.77 29.7 0.659 0.154 2003 6.7 6.82 97.3 5.38 20.7 0.455 0.262 2004 6.2 6.79 42.3 1.68 8.5 0.219 0.058 2005 5.5 6.83 49.3 1.73 16.0 0.386 0.145 2006 4.3 6.93 50.9 1.57 13.4 0.184 0.017 2007 3.9 6.89 52.1 1.59 10.0 0.133 0.022 2008 6.5 6.85 64.0 2.79 10.4 0.211 0.187 2009 5.8 6.85 55.3 4.08 17.8 0.307 0.098 2010 5.6 7.09 56.7 2.61 14.3 0.228 0.146 2011 5.0 6.89 51.0 1.27 13.5 0.330 0.023 2012 5.4 6.74 56.3 2.17 0.211 0.018 2013 5.5 6.81 59.5 3.85 0.190 0.032 2014 6.7 6.56 68.4 6.07 0.308 0.033 2015 7.6 7.27 46.8 1.90 0.476 0.174 2016 7.1 6.40 88.5 9.31 0.322 0.198 2017 8.1 6.83 52.2 1.51 0.185 0.021 2018 6.1 6.82 56.6 1.67 0.605 0.021 2019 7.2 6.59 46.4 1.20 0.167 0.012 2020 6.6 6.77 50.4 1.68 0.223 0.016 2021 4.0 6.12 77.2 7.03 0.438 < 0.010 Maximum 8.1 7.27 289.0 22.50 48.6 3.240 1.220 Minimum 0.9 6.12 42.3 1.20 4.0 0.133 < 0.010 Average 5.5 6.87 79.2 4.69 16.1 0.432 0.139 #Years 38 38 38 38 28 29 38 Site: HVC-5 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/11/2022 WATER QUALITY DATA Culvert Avove Meadow Crest Dr HEAVENLY VALLLEY CREEK Temp EC Chloride COD TKN NO3-N Date C pH umhos mg/L mg/L mg/L mg/L Note 1/26/2021 No Flow 2/24/2021 No Flow 3/25/2021 No Flow 4/27/2021 No Flow 5/18/2021 No Flow 6/29/2021 No Flow 7/21/2021 No Flow 7/30/2021 No Flow 7/30/2021 No Flow 8/31/2021 No Flow 9/14/2021 No Flow 10/21/2021 No Flow 1 0/2 212 0 2 1 No Flow 10/23/2021 No Flow 10/23/2021 No Flow 10/24/2021 No Flow 10/24/2021 5.7 7.14 48.2 2.79 0.622 0.213 10/28/2021 No Flow 11/9/2021 No Flow 11/9/2021 No Flow 11/9/2021 No Flow 11/24/2021 No Flow 1 212 9/2 0 2 1 No Flow Maximum 5.7 7.14 48.2 2.8 0.622 0.213 Minimum 5.7 7.14 48.2 2.79 0.622 0.213 Average 5.7 7.14 48.2 2.79 0.622 0.213 #Tests 1 1 1 1 0 1 1 Temp pH EC Chloride COD TKN NO3-N Year C umhos mg/L mg/L mg/L mg/L Comments 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 8.0 7.53 80.0 3.70 18.0 0.910 0.240 1995 4.2 6.83 36.0 2.00 41.0 1.000 0.130 1996 5.3 7.28 69.0 8.40 31.0 0.963 0.350 1997 4.3 6.49 268.0 3.50 29.0 0.840 0.070 1998 0.7 6.50 133.0 5.20 27.0 0.910 1.780 1999 8.0 6.97 67.4 12.60 25.7 1.190 0.123 2000 4.4 6.67 31.1 15.35 21.2 0.639 0.236 2001 Dry 2002 4.9 6.74 30.1 1.10 92.9 1.460 0.352 2003 1.1 7.29 37.0 6.69 24.0 0.583 0.222 2004 Dry 2005 3.7 6.73 74.3 4.08 66.0 1.016 0.689 2006 6.1 7.23 112.0 3.49 45.7 0.568 0.455 2007 2.1 6.62 45.9 3.27 93.5 0.875 0.216 2008 Dry 2009 5.9 7.01 36.0 2.76 31.6 0.447 0.210 2010 6.2 7.18 174.3 33.92 97.3 0.846 0.539 2011 6.3 6.64 66.7 3.72 208.0 0.980 0.441 2012 3.9 6.59 38.8 3.17 0.509 0.180 2013 15.7 5.89 50.7 4.34 1.880 0.401 2014 4.4 6.73 50.2 7.23 0.319 0.116 2015 9.5 6.08 33.8 8.46 1.201 0.069 2016 5.0 6.69 101.7 22.08 0.311 0.101 2017 5.9 6.43 50.7 8.41 0.823 0.187 2018 6.1 7.10 93.3 14.9 0.969 0.226 2019 4.7 6.39 124 8.99 0.428 2020 Dry 2021 5.7 7.14 48.2 2.8 0.622 0.213 Maximum 15.7 7.53 268.0 33.92 208.0 1.880 1.780 Minimum 0.7 5.89 30.1 1.10 18.0 0.311 0.069 Average 5.5 6.78 77.2 7.92 56.8 0.845 0.328 #Years 24 24 24 24 15 24 23 Nitrate-Nitrogen 1.40 1.20 1.00 J £ 0.80 Z M 0.60 O Z 0.40 0.20 o.00 HVC-1 f HVC-2 -A-HVC-3 Chloride 25 20 J 15 01 U10 s 0 HVC-1 f HVC-2 A-HVC-3 Electrical Conductivity 350 300 250 E ` 200 N O 150 s 100 50 0 HVC-1 f HVC-2 -A-HVC-3 EMERGENCY RETENTION BASIN, TREATMENT PLANT & BURIED SLUDGE MONITORING WELLS Iwo IV .00 h 14 f�- }� •�rly..'�+ �y r :ti a 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EM t •.!006ft SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/11/2022 Site: CONTROL WATER QUALITY DATA Area: Emergency Pond MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 01/09/21 6280.07 9.7 7.04 260 23.5 4.95 04/20/21 6279.73 9.5 7.78 245 23.3 4.84 07/20/21 6279.39 10.9 7.05 263 25.3 4.94 12/07/21 6278.51 8.8 6.91 274 26.1 4.92 Maximum 6280.07 10.9 7.78 274 26.1 4.95 Minimum 6278.51 8.8 6.91 245 23.3 4.84 Average 6279.43 9.7 7.20 261 24.6 4.91 #Tests 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 1985 1986 1987 6281.4 9.1 6.87 137 3.6 6 0.64 1988 6277.4 9.2 6.84 115 0.6 7 0.10 1989 6279.1 10.4 7.18 118 0.6 6 0.24 1990 6274.0 9.7 7.27 120 0.9 5 0.44 1991 6273.3 9.3 7.21 118 1.4 < 5 0.61 1992 6272.2 9.4 7.44 123 1.2 5 0.73 1993 6273.1 9.9 7.25 131 1.4 5 1.01 1994 6275.2 11.0 7.11 143 1.8 6 1.50 1995 6277.7 9.5 7.07 153 2.7 7 2.03 1996 6282.9 9.6 7.05 162 5.7 3 2.66 1997 6285.5 10.1 6.89 173 5.6 4 2.64 1998 6284.0 9.8 6.66 170 5.8 < 5 2.39 1999 6284.3 9.3 6.70 175 6.8 6 2.43 2000 6282.8 9.4 6.83 174 7.4 < 5 2.40 2001 6280.5 9.4 6.87 173 8.1 5 2.34 2002 6278.7 9.6 6.89 176 8.1 6 2.36 2003 6278.4 10.2 7.02 182 8.6 5 2.60 2004 6278.7 9.1 6.91 182 9.4 6 2.91 2005 6279.3 9.2 7.01 189 9.8 8 3.18 2006 6283.0 9.7 6.96 200 10.1 8 3.45 2007 6281.8 9.8 6.82 192 10.5 6 3.40 2008 6279.6 10.1 6.96 190 10.9 5 3.42 2009 6278.6 9.8 6.81 204 11.7 6 3.72 2010 6278.6 9.9 6.79 217 12.6 5 4.00 2011 6281.6 9.7 6.84 225 13.1 8 4.28 2012 6281.6 9.7 7.19 226 15.1 4.70 2013 6279.6 9.8 7.39 230 15.6 4.69 2014 6278.4 9.6 7.00 236 16.0 4.55 2015 6277.1 10.4 6.87 240 16.0 4.60 2016 6277.1 9.0 6.96 240 16.4 4.71 2017 6282.9 9.0 6.95 244 15.9 4.97 2018 6283.9 10.0 6.95 254 18.7 5.03 2019 6282.6 9.7 6.81 227 19.1 4.62 2020 6281.8 9.3 7.07 253 20.9 4.55 2021 6279.4 9.7 7.20 261 24.6 4.91 Maximum 6285.5 11.0 7.44 261 24.6 8 5.03 Minimum 6272.2 9.0 6.66 115 0.6 3 0.10 Average 6279.6 9.7 6.99 187 9.6 6 2.94 #Years 35 35 35 35 35 25 35 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/11/2022 Site: MW01.5 WATER QUALITY DATA Area: Emergency Pond MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 01/09/21 6268.00 9.4 7.24 169 1.86 0.350 04/20/21 6268.25 8.8 7.34 157 1.89 0.347 07/20/21 6268.02 10.4 7.40 172 1.90 0.362 12/06/21 6268.09 8.3 7.22 173 1.85 0.338 Maximum 6268.25 10.4 7.40 173 1.90 0.362 Minimum 6268.00 8.3 7.22 157 1.85 0.338 Average 6268.09 9.2 7.30 168 1.88 0.349 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 1985 1986 6273.3 8.1 7.11 402 30.6 4 4.72 1987 6272.9 9.1 6.87 355 23.7 5 2.79 1988 6271.6 9.7 6.97 327 20.7 8 2.21 1989 1990 1991 1992 1993 1994 1995 1996 1997 6270.4 9.6 7.02 196 6.0 4 0.970 1998 6269.5 9.0 6.98 165 4.3 < 5 0.670 1999 6275.9 9.3 7.03 171 3.4 < 5 0.680 2000 6268.9 9.4 7.08 170 3.0 6 0.650 2001 6268.5 9.3 6.80 157 2.6 5 0.510 2002 2003 2004 2005 6270.3 9.1 7.01 192 4.5 9 0.590 2006 6270.0 9.2 7.19 180 4.0 8 0.631 2007 6278.8 9.4 7.05 168 3.7 6 0.776 2008 6267.9 9.8 7.17 162 3.2 5 0.649 2009 6267.6 9.2 7.12 162 2.6 5 0.537 2010 6267.7 9.4 7.05 161 2.3 5 0.480 2011 6268.3 8.9 6.97 174 2.4 10 0.482 2012 6268.4 9.1 7.19 159 2.3 0.475 2013 6267.7 9.0 7.10 162 2.1 0.457 2014 6267.4 9.0 7.18 163 2.2 0.405 2015 6267.2 8.8 6.96 172 2.2 0.462 2016 6267.4 8.8 7.09 159 2.2 0.451 2017 6269.3 9.2 7.15 179 2.1 0.414 2018 6269.3 9.4 7.31 167 2.2 0.420 2019 6269.0 8.6 7.13 164 1.95 0.404 2020 6268.7 9.2 7.32 167 1.98 0.396 2021 6268.1 9.2 7.30 168 1.88 0.349 Maximum 6278.8 9.8 7.32 402 30.6 10 4.720 Minimum 6267.2 8.1 6.80 157 1.9 4 0.349 Average 6269.8 9.2 7.09 192 5.5 6 0.863 #Years 25 25 25 25 25 15 25 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/11/2022 Site: MW02-50 WATER QUALITY DATA Area: Emergency Pond MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 01/09/21 6286.55 8.8 6.59 269 27.8 1.97 04/20/21 6267.74 9.9 7.88 248 27.6 1.89 07/21/21 6266.86 11.2 6.54 266 29.0 1.68 12/06/21 6267.92 9.2 6.58 258 28.1 1.71 Maximum 6286.55 11.2 7.88 269 29.0 1.97 Minimum 6266.86 8.8 6.54 248 27.6 1.68 Average 6272.27 9.8 6.90 260 28.1 1.81 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 6284.1 1985 1986 6271.7 8.6 6.56 470 46.3 4 12.28 1987 6272.4 10.5 6.51 584 63.3 7 12.72 1988 6273.3 10.7 6.60 574 60.8 9 9.68 1989 6265.9 8.6 8.53 630 62.5 5 13.51 1990 Dry 1991 Dry 1992 Dry 1993 Dry 1994 Dry 1995 Dry 1996 6269.4 9.3 6.78 528 53.2 2 12.40 1997 6270.3 10.4 6.53 588 59.2 4 13.92 1998 6269.1 10.1 6.53 557 55.0 < 5 12.82 1999 6269.2 9.8 6.41 456 43.3 6 10.22 2000 6268.5 10.2 6.69 404 37.6 5 8.60 2001 6268.3 10.3 6.59 391 36.9 5 8.40 2002 Dry 2003 Dry 2004 Dry 2005 6270.1 9.9 6.53 535 52.0 12 15.16 2006 6269.9 10.4 6.37 614 53.9 10 18.35 2007 6268.6 10.5 6.31 573 52.7 8 14.98 2008 6268.0 10.7 6.59 438 42.7 5 9.48 2009 6266.7 10.6 6.49 389 39.2 6 7.35 2010 6265.9 10.3 6.50 364 37.9 7 6.38 2011 6268.6 10.0 6.54 358 36.9 13 5.84 2012 6268.2 10.2 6.46 348 39.0 5.16 2013 6267.1 10.0 6.66 334 37.2 4.39 2014 6266.7 10.1 6.77 326 37.6 3.88 2015 6266.5 10.3 6.73 323 36.6 3.25 2016 6266.2 9.9 6.69 312 36.2 2.93 2017 6269.0 9.7 6.68 312 29.9 2.69 2018 6269.2 10.4 6.65 304 31.5 3.04 2019 6268.6 9.8 6.54 285 30.1 2.60 2020 6268.9 10.5 6.76 270 28.3 2.14 2021 6272.3 9.8 6.90 260 28.1 1.81 Maximum 6284.1 10.7 8.53 630 63.3 13 18.35 Minimum 6265.9 8.6 6.31 260 28.1 2 1.81 Average 6269.4 10.1 6.66 427 43.3 7 8.30 #Years 28 27 27 27 27 17 27 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/11/2022 Site: MW03-50 WATER QUALITY DATA Area: Emergency Pond MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 01/09/21 6267.90 7.9 6.71 325 49.5 0.735 04/20/21 6268.07 10.0 7.01 296 48.9 1.82 07/20/21 6267.87 12.6 6.64 301 42.5 2.30 12/07/21 6267.99 9.7 6.23 419 47.2 9.93 Maximum 6268.07 12.6 7.01 419 49.5 9.930 Minimum 6267.87 7.9 6.23 296 42.5 0.735 Average 6267.96 10.1 6.65 335 47.0 3.70 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 6275.7 9.4 6.40 431 45.7 16 7.19 1985 6270.5 10.8 6.46 418 36.6 25 9.84 1986 6273.9 10.7 6.21 443 41.4 10 5.37 1987 6272.7 10.4 6.29 518 59.2 9 1.63 1988 6269.4 11.1 6.28 653 68.9 6 1.79 1989 6265.9 11.7 6.39 738 67.3 8 0.88 1990 6265.4 11.3 6.44 814 66.2 10 2.24 1991 6265.1 10.6 6.52 713 63.6 8 0.75 1992 6265.2 10.2 6.57 668 61.4 9 1.41 1993 6266.1 10.8 6.41 636 57.9 8 1.51 1994 6265.4 10.9 6.45 645 60.5 8 1.34 1995 6267.3 9.8 6.51 578 53.2 9 6.78 1996 6269.1 10.4 6.26 539 55.0 3 13.48 1997 6270.4 10.4 6.20 595 51.3 4 21.33 1998 6269.2 10.2 6.11 493 46.5 < 5 11.17 1999 6269.2 9.8 6.11 400 38.3 5 4.53 2000 6268.5 10.3 6.46 381 32.0 5 4.85 2001 6268.0 10.6 6.33 494 42.6 5 18.51 2002 6267.6 10.6 5.96 671 55.8 7 28.95 2003 6267.5 10.8 6.11 623 60.4 5 22.14 2004 6267.4 9.9 6.27 531 50.9 6 16.43 2005 6270.6 10.4 6.33 513 49.9 10 21.70 2006 6270.1 10.6 6.22 542 61.0 9 17.00 2007 6268.8 10.8 6.10 500 67.5 7 10.30 2008 6268.0 11.0 6.59 429 63.1 6 5.90 2009 6267.8 10.3 6.50 480 58.3 6 14.10 2010 6267.7 10.7 6.48 493 62.4 7 17.10 2011 6268.8 10.5 6.36 469 63.7 10 11.60 2012 6268.3 10.6 6.35 396 53.9 5.10 2013 6267.6 10.8 6.40 484 51.6 16.70 2014 6267.2 10.2 6.16 598 53.2 27.50 2015 6267.0 10.3 6.15 560 47.4 23.10 2016 6267.3 10.0 6.23 474 41.6 14.60 2017 6269.4 10.0 6.33 504 84.7 5.00 2018 6269.2 9.7 6.26 518 104.7 0.82 2019 6268.8 9.9 6.23 384 69.1 0.60 2020 6268.4 10.7 6.53 341 53.7 0.65 2021 6268.0 10.1 6.65 335 47.0 3.70 Maximum 6275.7 11.7 6.65 814 104.7 25 28.95 Minimum 6265.1 9.4 5.96 335 32.0 3 0.60 Average 6268.5 10.5 6.33 526 56.5 8 9.94 #Years 38 38 38 38 38 28 38 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/11/2022 Site: MW04-50 WATER QUALITY DATA Area: Emergency Pond MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 01/09/21 6269.07 7.8 6.29 89.9 5.04 0.142 04/20/21 6269.05 8.3 7.08 80.0 5.08 0.200 07/20/21 6268.80 9.5 6.46 90.2 4.95 0.235 12/06/21 6268.70 8.0 6.20 90.9 4.92 0.270 Maximum 6269.07 9.5 7.08 90.9 5.08 0.270 Minimum 6268.70 7.8 6.20 80.0 4.92 0.142 Average 6268.91 8.4 6.51 87.8 5.00 0.212 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 6266.6 11.4 6.68 90 1.8 3 0.330 1985 1986 6266.9 7.2 6.18 75 3.8 4 0.570 1987 6265.6 8.9 6.14 208 31.7 6 1.720 1988 6263.8 8.7 5.96 306 44.9 8 1.350 1989 6261.6 9.5 6.12 284 36.5 6 1.190 1990 6263.0 8.7 6.20 272 35.9 6 1.494 1991 6263.2 8.5 6.39 286 46.6 5 1.047 1992 6261.8 8.4 6.23 358 55.8 6 0.686 1993 6263.4 9.0 6.19 217 25.6 6 0.637 1994 6263.7 9.1 6.16 190 21.9 7 0.565 1995 6267.5 8.6 6.70 146 12.9 11 0.365 1996 6269.5 8.7 6.38 85 4.8 3 0.070 1997 6271.4 8.9 6.37 77 5.3 4 0.070 1998 6270.1 8.4 6.15 140 6.0 < 5 0.060 1999 6270.1 8.6 6.04 77 5.5 < 5 0.070 2000 6267.9 8.3 6.58 76 5.3 < 5 0.070 2001 6267.6 9.1 6.48 77 4.8 < 5 0.100 2002 6267.3 8.8 6.06 80 4.4 6 0.100 2003 6267.6 9.1 6.32 79 5.5 5 0.080 2004 6267.8 6.6 6.27 74 4.2 5 0.050 2005 6269.8 8.7 6.32 80 4.2 9 0.061 2006 6271.8 8.9 6.48 81 6.2 8 0.026 2007 6269.4 9.1 6.57 81 6.6 6 0.027 2008 6268.7 9.1 6.78 80 6.5 5 0.027 2009 6268.3 8.7 6.21 80 5.9 7 0.037 2010 6268.6 9.0 6.14 82 5.5 6 0.037 2011 6271.0 9.1 6.11 81 5.4 6 0.037 2012 6269.4 8.6 6.19 79 6.3 0.042 2013 6268.8 8.9 6.17 78 5.4 0.116 2014 6268.3 8.9 6.31 81 5.1 0.298 2015 6267.9 8.9 6.27 91 4.9 0.608 2016 6268.4 9.0 6.16 90 4.9 0.826 2017 6269.0 6.6 6.33 100 9.3 0.071 2018 6270.6 8.5 6.28 98 8.5 0.064 2019 6270.7 8.3 6.27 88 6.7 0.063 2020 6269.8 8.6 6.39 85 5.9 0.074 2021 6268.9 8.4 6.51 88 5.0 0.212 Maximum 6271.8 11.4 6.78 358 55.8 11 1.720 Minimum 6261.6 6.6 5.96 74 1.8 3 0.026 Average 6267.7 8.7 6.30 125 12.6 6 0.358 #Years 37 37 37 37 37 27 37 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/11/2022 Site: MW07-50 WATER QUALITY DATA Area: Emergency Pond MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 03/25/21 6277.46 7.4 7.48 176 10.1 0.369 04/20/21 6277.42 8.8 7.21 160 10.5 0.420 07/20/21 6277.09 9.5 7.33 175 10.7 0.477 12/06/21 6276.22 7.2 7.63 178 10.3 0.464 Maximum 6277.46 9.5 7.63 178 10.7 0.477 Minimum 6276.22 7.2 7.21 160 10.1 0.369 Average 6277.05 8.2 7.41 172 10.4 0.433 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 6282.7 1985 1986 6280.7 1987 6277.4 7.4 6.61 293 28.2 6 0.570 1988 6274.1 7.6 6.64 291 28.3 8 0.560 1989 6271.1 7.6 6.65 287 28.7 6 0.580 1990 6273.3 7.0 6.69 287 28.3 6 0.609 1991 6270.8 7.7 6.83 287 30.3 7 0.492 1992 6268.8 6.7 6.71 282 29.8 6 0.497 1993 6270.9 7.6 6.67 297 29.3 7 0.484 1994 6272.5 8.2 6.68 287 29.2 8 0.527 1995 6275.2 7.6 6.81 282 30.0 8 0.548 1996 6279.2 8.1 6.48 281 28.9 4 0.560 1997 6281.1 8.2 6.50 278 28.4 4 0.560 1998 6280.2 8.0 6.34 274 27.8 < 5 0.610 1999 6280.2 8.1 6.28 268 25.9 5 0.590 2000 6279.1 7.9 6.53 260 25.2 5 0.620 2001 6277.4 7.9 6.43 251 24.1 5 0.610 2002 6276.3 7.8 6.41 247 22.2 7 0.570 2003 6276.3 8.1 6.36 244 21.7 5 0.580 2004 6276.2 7.7 6.37 234 20.9 6 0.600 2005 6277.3 7.7 6.55 228 20.1 13 0.558 2006 6279.8 8.5 6.57 227 18.7 10 0.545 2007 6278.5 8.0 6.20 237 18.5 7 0.565 2008 6277.2 8.7 6.41 232 18.3 5 0.556 2009 6276.5 8.0 6.41 223 17.6 7 0.544 2010 6276.8 8.1 6.34 216 16.3 8 0.534 2011 6279.1 8.0 6.32 206 15.1 7 0.493 2012 6278.5 8.1 6.77 202 14.8 0.525 2013 6277.2 8.3 6.55 198 13.9 0.505 2014 6275.9 8.2 6.79 196 13.8 0.490 2015 6275.2 9.5 7.30 196 12.8 0.469 2016 6274.3 8.8 7.11 194 12.7 0.467 2017 6280.8 7.8 6.87 181 11.2 0.443 2018 6280.1 8.3 7.58 179 11.0 0.439 2019 6279.6 7.9 6.95 178 11.3 0.451 2020 6276.1 8.2 7.21 173 10.5 0.446 2021 6277.1 8.2 7.41 172 10.4 0.433 Maximum 6282.7 9.5 7.58 297 30.3 13 0.620 Minimum 6268.8 6.7 6.20 172 10.4 4 0.433 Average 6276.8 8.0 6.67 239 21.0 7 0.532 #Years 37 35 35 35 35 25 35 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/11/2022 Site: MW08-25 WATER QUALITY DATA Area: Treatment Plant MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 01/09/21 6245.24 11.5 6.85 909 28.5 0.025 04/20/21 6246.11 9.2 7.35 409 24.1 0.438 07/20/21 6244.55 11.2 6.9 820 30.2 0.043 12/06/21 6245.09 10 6.44 439 30.6 < 0.010 Maximum 6246.11 11.5 7.35 909 30.6 0.438 Minimum 6244.55 9.2 6.44 409 24.1 < 0.010 Average 6245.25 10.5 6.89 644 28.4 0.129 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 6246.0 9.2 6.30 878 136.1 75 0.250 1985 6247.8 9.9 6.41 876 143.0 72 0.570 1986 6247.2 9.8 6.38 878 126.4 72 0.570 1987 6246.5 9.2 6.28 811 119.0 59 0.280 1988 6247.4 9.4 6.37 828 102.0 57 0.180 1989 6247.7 10.2 6.33 753 101.0 57 0.080 1990 6247.4 9.3 6.35 742 93.5 50 0.094 1991 6246.8 8.7 6.40 701 84.8 43 0.067 1992 6246.6 8.0 6.50 766 73.1 56 0.064 1993 6246.9 8.8 6.38 715 54.9 61 0.014 1994 6246.8 9.5 6.35 827 50.1 65 < 0.010 1995 6248.5 8.9 6.48 830 41.2 72 0.020 1996 6248.3 9.8 6.39 940 42.3 81 0.030 1997 6248.2 10.1 6.33 971 51.3 76 0.010 1998 6248.2 9.7 6.24 1016 50.2 79 0.020 1999 6248.2 9.7 6.25 1017 49.9 85 < 0.010 2000 6247.3 10.2 6.36 1011 50.3 87 < 0.010 2001 6246.4 10.0 6.38 1017 51.3 86 0.040 2002 6246.5 10.0 6.34 967 41.3 90 0.030 2003 6246.8 9.9 6.44 960 36.6 91 0.020 2004 6246.3 9.7 6.43 907 32.4 93 0.020 2005 6247.4 9.4 6.47 828 29.7 90 0.026 2006 6247.9 9.7 6.47 918 27.7 92 0.018 2007 6246.5 10.3 6.37 956 27.6 102 0.018 2008 6244.7 10.8 6.55 872 22.9 93 0.021 2009 6245.5 10.3 6.18 759 20.1 77 2.988 2010 6246.4 9.3 5.80 528 21.7 48 5.659 2011 6247.4 9.3 5.96 489 12.2 26 0.140 2012 6246.4 9.7 6.28 724 17.8 0.074 2013 6245.2 10.4 6.54 823 17.6 0.016 2014 6245.1 10.0 6.34 690 20.3 0.795 2015 6244.3 10.6 6.43 761 19.5 0.011 2016 6246.0 9.5 5.75 430 17.5 6.728 2017 6248.6 9.9 6.22 348 11.3 0.294 2018 6247.1 10.1 6.68 597 19.7 0.028 2019 6247.3 10.2 6.71 659 21.2 0.036 2020 6246.4 10.4 6.28 673 22.1 0.090 2021 6245.3 10.5 6.89 644 28.4 0.129 Maximum 6248.6 10.8 6.89 1017 143.0 102 6.728 Minimum 6244.3 8.0 5.75 348 11.3 26 < 0.010 Average 6246.8 9.7 6.36 792 49.7 73 0.512 #Years 38 38 38 38 38 28 38 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/11/2022 Site: MW11 WATER QUALITY DATA Area: Buried Sludge MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 01/09/21 6265.48 8.4 6.13 345 73.3 0.098 04/20/21 6264.89 11.1 6.14 431 90.6 0.125 07/21/21 6263.66 12/31/21 Maximum 6265.48 11.1 6.14 431 90.6 0.125 Minimum 6263.66 8.4 6.13 345 73.3 0.098 Average 6264.68 9.8 6.14 388 82.0 0.112 3 2 2 2 2 0 2 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 1985 1986 1987 1988 1989 1990 1991 1992 6257.3 8.9 7.25 159 1.4 5.820 1993 6257.5 9.1 7.15 202 1.0 9.220 1994 6258.5 8.1 7.13 172 0.9 5.830 1995 6260.7 8.8 6.98 139 1.5 3.080 1996 6265.0 8.7 6.74 97 1.7 0.170 1997 6268.7 9.3 6.77 88 1.7 0.120 1998 6268.5 8.6 6.53 86 1.2 0.300 1999 6269.2 8.4 6.46 81 1.2 6 0.120 2000 6267.5 8.5 6.84 78 0.9 5 0.100 2001 6264.4 8.6 6.73 81 1.1 5 0.070 2002 6262.3 8.5 6.67 100 1.4 7 0.160 2003 6261.1 8.8 6.73 103 1.5 6 0.180 2004 6261.8 4.7 5.70 59 0.7 3 0.260 2005 6262.2 9.2 6.83 108 1.2 11 0.563 2006 6266.5 9.4 6.54 136 1.7 9 0.228 2007 6266.1 9.0 6.42 132 2.5 8 0.218 2008 6263.9 9.5 6.63 119 1.6 5 0.165 2009 6262.1 10.2 6.56 110 1.4 7 0.184 2010 6261.1 9.1 6.64 113 1.3 7 0.163 2011 6264.0 9.1 6.40 159 4.2 8 0.120 2012 6264.9 9.5 6.28 170 5.7 0.114 2013 6263.0 9.4 6.56 139 2.7 0.116 2014 6261.3 9.3 6.66 131 2.5 0.101 2015 6259.9 10.0 6.44 123 1.8 0.123 2016 6259.1 10.7 6.39 109 1.5 0.308 2017 6265.8 9.1 6.42 213 22.3 0.150 2018 6269.1 9.5 6.14 234 32.7 0.051 2019 6268.7 8.6 6.11 210 26.0 0.043 2020 6267.3 9.4 6.21 269 29.1 0.046 2021 6264.7 9.8 6.14 388 82.0 0.112 Maximum 6269.2 10.7 7.25 388 82.0 11 9.220 Minimum 6257.3 4.7 5.70 59 0.7 3 0.043 Average 6263.7 9.0 6.57 144 7.9 7 0.941 #Years 30 30 30 30 30 13 30 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/11/2022 Site: MW12 WATER QUALITY DATA Area: Buried Sludge MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 01/09/21 6262.60 9.7 6.47 263 9.71 0.593 04/20/21 6262.76 13.5 6.59 258 8.90 0.501 07/21/21 6260.88 12.8 6.37 193 5.99 0.785 12/06/21 6261.22 9.3 6.41 261 8.26 0.436 Maximum 6262.76 13.5 6.59 263 9.7 0.79 Minimum 6260.88 9.3 6.37 193 6.0 0.44 Average 6261.87 11.3 6.46 244 8.2 0.58 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 1985 1986 1987 1988 1989 1990 1991 1992 6259.7 10.2 6.46 169 2.9 1.55 1993 6261.1 9.8 6.47 500 6.4 4.72 1994 6260.5 9.0 6.42 353 3.8 4.22 1995 6263.7 9.3 6.60 646 5.6 4.03 1996 6265.4 9.4 6.48 477 4.3 3.23 1997 6266.8 10.1 6.57 257 3.0 0.79 1998 6266.4 9.2 6.31 205 2.9 0.35 1999 6266.7 8.7 6.16 167 2.3 8 0.17 2000 6265.6 8.9 6.42 143 1.9 6 0.21 2001 6262.7 9.1 6.47 105 1.8 6 0.43 2002 6262.3 9.5 6.19 113 1.6 6 0.56 2003 6262.4 9.6 6.18 155 2.0 6 0.93 2004 6262.4 9.2 6.25 186 2.0 6 1.85 2005 6262.7 10.0 6.27 311 3.3 12 2.49 2006 6265.6 10.7 6.43 648 5.1 15 2.61 2007 6263.8 10.5 6.18 323 3.0 9 1.74 2008 6262.5 10.8 6.28 228 2.3 6 1.18 2009 6261.6 12.1 6.25 265 2.3 9 1.43 2010 6261.5 10.3 6.34 368 2.8 8 3.67 2011 6263.8 11.4 6.41 696 7.4 13 7.45 2012 6263.0 10.9 6.44 382 8.2 3.31 2013 6262.0 12.3 6.39 283 5.9 1.45 2014 6260.8 11.7 6.45 327 4.3 3.57 2015 6259.0 9.2 6.63 133 1.3 1.44 2016 6259.1 12.4 6.54 937 6.8 38.10 2017 6265.0 10.9 6.48 957 20.1 20.16 2018 6266.2 11.9 6.60 591 27.9 5.10 2019 6269.9 10.3 6.51 406 19.0 1.68 2020 6264.0 10.7 6.59 327 13.1 0.86 2021 6261.9 11.3 6.46 244 8.2 0.58 Maximum 6269.9 12.4 6.63 957 27.9 15 38.10 Minimum 6259.0 8.7 6.16 105 1.3 6 0.17 Average 6263.5 10.3 6.41 365 6.5 8 3.92 #Years 31 31 31 31 31 13 31 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/11/2022 Site: MW13 WATER QUALITY DATA Area: Buried Sludge MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 01/09/21 6255.36 7 7.41 566 23.6 1.49 04/20/21 6257.87 5.7 7.08 587 19.3 7.59 07/21/21 6254.90 11.5 6.91 599 31.4 1.74 12/06/21 6255.12 7.5 6.74 561 27.6 1.84 Maximum 6257.87 11.5 7.41 599 31.4 7.6 Minimum 6254.90 5.7 6.74 561 19.3 1.49 Average 6255.81 7.9 7.04 578 25.5 3.17 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 1985 1986 1987 1988 1989 1990 1991 1992 6255.0 8.9 6.82 1071 12.1 6.79 1993 6256.8 7.3 6.85 1310 6.3 43.39 1994 6255.3 7.8 6.82 942 6.3 17.72 1995 6257.4 7.2 6.83 1053 5.9 20.43 1996 6257.9 7.9 6.85 827 3.6 8.71 1997 6257.9 8.4 6.79 814 4.9 6.16 1998 6258.0 7.6 6.78 802 3.7 5.16 1999 6257.9 7.4 6.88 746 4.0 23 4.23 2000 6257.1 6.7 6.91 689 2.9 14 2.57 2001 6255.8 6.8 6.76 708 4.3 19 3.99 2002 6256.2 7.1 6.90 801 4.2 21 10.08 2003 6256.8 7.5 6.95 904 4.6 21 14.79 2004 6256.5 7.6 6.86 666 4.1 19 10.62 2005 6257.2 7.6 7.04 728 5.4 21 10.27 2006 6257.5 8.2 6.83 828 4.0 23 10.71 2007 6256.5 7.8 6.89 748 4.9 19 9.65 2008 6256.9 9.0 6.91 722 6.4 14 10.04 2009 6255.2 8.1 6.89 674 9.1 17 8.93 2010 6256.4 7.7 6.95 750 9.8 20 14.14 2011 6257.2 8.1 6.80 844 15.4 23 17.37 2012 6256.0 7.6 7.00 685 19.4 11.04 2013 6255.8 8.8 7.17 695 19.2 7.03 2014 6255.3 8.7 7.03 615 18.5 4.18 2015 6254.0 9.0 6.82 617 20.9 2.50 2016 6256.1 8.5 6.79 744 23.2 21.59 2017 6258.0 7.3 7.22 812 21.7 11.15 2018 6257.2 7.8 7.22 633 28.3 4.40 2019 6257.2 7.4 6.95 703 33.3 6.60 2020 6256.4 7.8 7.23 651 30.1 3.49 2021 6255.8 7.9 7.04 578 25.5 3.17 Maximum 6258.0 9.0 7.23 1310 33.3 23 43.39 Minimum 6254.0 6.7 6.76 578 2.9 14 2.50 Average 6256.6 7.9 6.93 779 12.1 20 10.36 #Years 30 30 30 30 30 13 30 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/11/2022 Site: ERB Area: Emergency Pond MONITORING WELLS Temp EC Chloride COD NO3-N Date C pH umhos mg/L mg/L mg/L Comments 04/07/21 11.2 7.63 656 53.8 0.073 07/16/21 20.8 7.72 782 82.1 0.090 09/09/21 18.6 7.96 550 87.0 7.790 12/30/21 3.5 7.50 591 61.8 0.260 Maximum 20.8 7.96 782 87.0 0 7.790 Minimum 3.5 7.50 550 53.8 0 0.073 Average 13.5 7.70 645 71.2 2.053 4 4 4 4 0 4 Temp EC Chloride COD NO3-N Year C pH umhos mg/L mg/L mg/L Comments 1984 1985 1986 9.0 7.35 622 81.2 66 0.580 1987 10.7 7.30 575 62.1 192 0.200 1988 4.6 6.50 713 108.9 35 1.240 1989 1990 6.85 325 25.8 125 0.080 1991 1992 1993 17.1 7.15 551 64.5 46 0.210 1994 20.7 9.47 484 72.2 20 0.100 1995 16.6 7.90 470 55.0 48 0.060 1996 12.2 7.33 434 40.9 29 0.540 1997 8.1 7.14 415 44.2 45 0.070 1998 21.9 6.63 556 44.9 24 0.040 1999 Dry 2000 2001 18.9 7.91 596 60.2 42 0.120 2002 Dry 2003 Dry 2004 3.0 3.37 174 20.2 9 0.040 2005 15.4 7.59 599 57.9 39 0.798 2006 16.78 MG stored 2007 Dry 2008 3.51 MG stored 2009 16.4 7.25 569 60.4 61 0.084 2010 19.6 7.81 629 45 2011 4.8 7.63 481 37.4 26 0.108 2012 Dry 2013 Dry 2014 14.4 7.47 607 67.3 0.423 2015 Dry 2016 17.5 7.56 678 64.7 1.332 2017 1.1 6.84 86 9.9 0.109 2018 No Sample 2019 6.5 7.63 545 48.8 0.187 2020 18.3 7.40 737 76.4 0.313 2021 13.5 7.70 645 71.2 2.053 Maximum 21.9 9.47 737 108.9 192 2.053 Minimum 1.1 3.37 86 9.9 9 0.040 Average 12.9 7.26 522 55.9 53 0.414 #Years 21 22 22 21 16 21 ERB and Plant Monitoring Wells WATER LEVEL WATER LEVEL Mean Sea Level Mean Sea Level 6290 6290 628s 6285 ♦ 6280 6275 6280 6270 a+ � N Ass A-0- 6275 y 6265 LL LL 6260 6270 i�� 6255 6250 6265 6245 6260 6240 Control MW01.5 MW02 f MW03 t MW04 t MW07 t MW08 NITRATE-NITROGEN NITRATE-NITROGEN 30 7 25 6 • •� 5 20 J J 4 � 15 f Vx 10 2 5 � tControl tMW01.5 —d,—MW02 tMW03 tMW04 tMW07 tMW08 ERB and Plant Monitoring Wells CHLORIDES CHLORIDES 100 150 140 90 130 Ar 80 120 110 70 • 100 60 • • 90 J . : J 80 50 - 70 E 40 E 60 •Y'� 50 30 40 20 30 20 10 10 0 0 ---*..—Control t MW01.5 —*—MW02 MW03 t MW04 t MW07 t MW08 CONDUCTIVITY CONDUCTIVITY 1000 1200 900 800 1000 700 800 N 600 fn O O s 50o ir t 600 3 400 a 300 00 200 200 100 0 0 tControl tMW01.5 —i—MW02 tMW03 tMW04 tMW07 tMW08 Buried Monitoring Wells WATER LEVEL NITRATE-NITROGEN Mean Sea Level so 6280 as 6275 40 35 6270 30 a+ 6265 25 d d E 6260 LL 20 15 6255 10 6250 5 6245 0 tMW11 —A--MW12 tMW13 tMW11 tMW12 tMW13 CHLORIDES CONDUCTIVITY 35 1500 1400 30 1300 1200 25 1100 1000 900 JIL J 20 O 800 0) 700 1= or 15 3 600 500 10 400 300 5 200 100 0 0 tMW11 —*---MW12 tMW13 tMW11 —A--MW12 tMW13 HARVEY PLACE RESERVOIR SOUTH TAHOE PUBLIC UTILITY DISTRICT HARVEY PLACE RESERVOIR DATA SUMMARY From: January 1,2021 To: December 31,2021 Temp NH3+ NH3-N Org-N TKN NO3-N NO2-N Total N PO4-P Total P Alk MBAS D.O. D.O. % Date pH C NH4 mg/I mg/I mg/I mg/I mg/I mg/L mg/I mg/I mg/I mg/I mg/I Saturation 1/4/2021 7.83 3.8 25.2 0.192 -3.2 22 1.00 0.420 23 2.76 2.96 176 9.96 92.7 2/1/2021 7.74 3.3 26 0.155 -2.0 24 0.858 0.351 25 2.96 2.70 180 9.87 90.6 3/3/2021 8.33 5.7 23.9 0.66 0.1 24 0.976 0.234 25 2.78 2.77 174 8.11 88.5 4/1/2021 7.95 12.1 26.1 0.501 2.6 28.7 0.934 0.174 29.8 3.11 2.92 176 8.48 95.3 5/4/2021 8.6 14.9 24.3 2.37 2.7 27.0 0.982 0.234 28.2 3.11 3.00 168 15.73 190.5 5/11/2021 8.94 16.6 0.00 0.0 22.54 287.1 6/23/2021 8.59 21.4 19.4 20.4 1.26 0.554 22.2 3.20 3.27 152 6.68 94.2 6/29/2021 8.68 23.7 0.00 0.0 19.79 284.5 7/27/2021 7.68 20.9 17.8 0.354 0 20.4 1.02 0.459 21.9 3.53 3.77 158 6.60 90.14 8/11/2021 8.32 21.0 18.5 1.516 0 20.6 0.479 0.363 21.4 4.05 4.00 169 12.20 167.8 9/8/2021 8.34 18.8 16.1 1.187 0 18.1 1.54 0.455 20.1 4.06 4.46 157 11.91 155.8 10/12/2021 8.04 9.9 22.6 0.449 0 28.8 1.20 1.51 31.5 3.11 3.62 172 7.62 83.12 11/3/2021 7.85 10.6 17.1 0.233 2.2 19.3 4.09 1.31 24.7 2.26 2.69 126 9.44 102.9 12/15/2021 8.33 3.1 18.9 0.423 3 21.6 3.09 0.814 25.5 2.57 2.98 140 9.80 90.9 Maximum 8.94 23.7 26.1 2.4 2.7 28.8 4.09 1.510 31.5 4.06 4.46 180 22.5 287 Minimum 7.68 3.1 16.1 0.0 -3.2 18.1 0.48 0.174 20.1 2.26 2.69 126 6.60 83.1 Average 8.23 13.3 21.3 0.6 0.4 22.9 1.45 0.573 24.9 3.13 3.26 162 11.34 136.7 #Samples 14 14 12 13 13 12 12 12 12 12 12 12 0 14 14 SOUTH TAHOE PUBLIC UTILITY DISTRICT HARVEY PLACE RESERVOIR DATA SUMMARY From: January 1,2021 To: December 31,2021 Water COD BOD CI TDS S.S. Turb EC Ca Na Mg SAR Level Flow % Ice Date mg/I mg/I mg/I mg/I mg/I NTU us/cm mg/I mg/I mg/I ft. acre-ft Cover 1/4/2021 5.13 58.3 264 28.4 7.6 638 20.5 54.0 4.93 2.78 34 0 2/1/2021 3.88 57.0 255 2.90 3.2 600 19.5 51.8 4.68 2.73 38 70 3/3/2021 7.87 53.2 254 6.08 4.2 614 19.3 52.0 4.74 2.75 42 0 4/1/2021 4.56 57.5 257 4.08 1.3 582 18.4 48.8 4.47 2.65 45 0 5/4/2021 11.4 61.3 261 9.90 2.9 580 18.8 50.9 4.69 2.72 47.5 0 5/11/2021 564 48 0 6/23/2021 NV 60.2 277 5.58 4.3 576 19.5 54.0 4.94 2.83 46 0 6/29/2021 14.6 543 45 0 7/27/2021 19.8 61.2 290 10.6 5.3 599 21.1 59.0 5.22 2.98 36.5 0 8/11/2021 11.4 67.4 302 10.2 4.7 605 21.2 58.4 5.16 2.95 36 0 9/8/2021 18.8 67.8 310 23.2 6.6 629 21.8 61.1 5.30 3.04 32 0 10/12/2021 20.6 64.1 288 24.3 12 625 21.4 55.0 4.96 2.78 12 0 11/3/2021 7.99 52.6 264 6.40 3.6 557 20.3 48.9 4.69 2.54 23 0 12/15/2021 10.7 54.4 264 8.98 4.8 568 21.0 49.5 4.80 2.53 31 0 Maximum 20.6 67.8 310 28.4 12 638 21.8 61.1 5.30 3.04 48.0 0 70 Minimum 3.88 52.6 254 2.90 1.3 543 18.4 48.8 4.47 2.53 12.0 0 0 Average 11.4 59.6 274 11.7 5.0 591 20.2 53.6 4.88 2.77 36.9 5 #Samples 0 12 12 12 12 12 14 12 12 12 12 14 0 14 SOUTH TAHOE PUBLIC UTILITY DISTRICT HARVEY PLACE RESERVOIR DATA SUMMARY From: January 1,2021 To: December 31,2021 Coliforms Fecal Air Algae Weeds Total Fecal/E. coli Strep Temp SO4 Boron Date MPN MPN MPN C mg/L mg/L Comments 1/4/2021 No No 228 3.1 4.25 22.9 2/1/2021 No No 34.1 < 1 10.6 21.6 3/3/2021 yes no 6.3 < 1 8.0 20.7 4/1/2021 Yes No 172 < 1 23.2 20 5/4/2021 Yes No 178 1.0 25.3 17.3 5/11/2021 Yes No 18.0 6/23/2021 No No 9100 13.5 27.6 18.6 6/29/2021 Yes No 30.4 7/27/2021 No No 488 19.9 20.2 18.2 8/11/2021 No No 727 14.4 20.4 17.4 9/8/2021 No No 31100 1.0 27.7 17 10/12/2021 No No 4960 13.4 11.9 20.1 11/3/2021 No No 2420 17.3 17.1 29 12/15/2021 No No 2710 11.0 0.1 24.3 Maximum 31,100 19.9 30.4 29.0 Minimum 6.3 < 1 0.1 17.0 Average 4,344 8.1 17.5 20.6 #Samples 14 14 12 12 14 12 0 SOUTH TAHOE PUBLIC UTILITY DISTRICT HARVEY PLACE RESERVOIR DATA SUMMARY From: 1989 To: 2020 Temp NH3+ NH3-N Org-N TKN NO3-N NO2-N Total N PO4-P Total P Alk MBAS D.O. D.O. Year pH C NH4 mg/I mg/I mg/I mg/I mg/I mg/L mg/I mg/I mg/I mg/I mg/I %SAT 89 8.10 13.6 8.59 0.264 1.63 10.2 4.94 0.14 15.29 1.94 2.21 70 0.040 8.64 101.02 90 8.40 14.5 6.71 1.01 4.58 11.3 5.86 0.22 17.37 2.73 3.20 72 0.080 8.51 102.85 91 7.72 13.9 2.78 0.103 1.63 4.41 9.93 0.27 14.61 2.52 2.89 53 0.060 7.23 87.49 92 7.73 14.3 4.69 0.083 1.61 6.30 8.25 0.32 14.87 3.60 3.86 61 0.070 7.30 86.26 93 7.76 12.3 7.84 0.119 1.20 9.04 5.03 0.23 14.30 2.90 3.05 70 0.060 7.49 84.49 94 7.80 11.1 15.5 0.223 1.65 16.8 2.85 0.32 19.99 3.16 3.18 118 0.080 7.25 80.39 95 7.82 13.0 16.3 0.308 2.86 18.6 0.82 0.13 19.51 2.26 2.49 119 0.060 8.11 93.85 96 7.80 13.8 14.1 0.472 1.88 15.9 1.12 0.27 17.24 2.06 2.13 116 0.060 7.44 89.74 97 7.71 12.2 12.3 0.165 0.88 12.3 1.37 0.23 13.88 1.77 2.03 100 0.030 7.48 83.93 98 7.65 11.7 13.9 15.6 1.73 0.31 17.63 2.27 2.28 110 0.070 7.83 90.18 99 7.51 12.3 14.5 0.121 1.78 15.7 1.39 0.34 17.42 2.05 2.26 106 0.060 6.63 69.93 00 7.95 12.9 15.7 0.696 2.83 18.2 0.93 0.31 19.47 2.26 2.50 110 0.070 8.29 99.53 01 7.94 12.8 15.6 0.608 2.10 17.5 1.26 0.49 19.26 2.33 2.57 107 8.36 103.10 02 7.79 13.2 12.9 0.408 2.33 15.2 2.10 0.52 17.83 2.22 2.51 99 8.64 104.13 03 7.76 12.5 16.0 0.287 2.49 18.3 1.20 0.56 20.05 2.26 2.44 113 7.31 77.82 04 7.85 11.9 17.4 0.477 19.6 1.10 0.31 20.84 2.55 2.75 116 7.52 75.17 05 7.96 11.6 15.2 0.617 1.28 16.2 1.16 0.36 17.76 2.66 2.70 130 8.63 97.22 06 7.68 11.9 14.6 0.391 1.68 16.2 0.93 0.21 17.37 2.22 2.36 127 8.37 92.53 07 8.41 12.5 16.7 1.46 2.35 19.3 0.56 0.29 20.11 2.85 3.06 151 9.65 104.52 08 8.21 11.2 15.1 0.974 1.55 16.6 1.69 0.62 18.91 2.86 3.08 133 7.82 82.84 09 8.07 11.1 16.6 0.526 1.70 18.1 1.97 0.51 20.58 2.87 3.07 139 6.82 76.61 10 7.93 10.7 15.9 0.430 0.38 15.1 1.75 0.54 17.35 2.58 2.79 140 6.66 71.41 11 7.90 11.3 12.6 0.430 2.49 15.0 1.96 0.72 17.65 2.00 2.26 117 7.38 82.91 12 7.60 12.0 15.4 0.291 17.90 18.2 2.90 0.61 21.70 2.53 2.59 133 6.54 72.70 13 8.17 11.4 12.0 0.943 5.51 17.5 3.87 0.60 22.01 2.13 2.44 113 8.97 94.88 14 8.23 11.3 14.4 1.11 2.50 17.0 2.80 0.49 20.24 2.56 2.98 130 7.37 77.79 15 7.86 12.0 15.2 0.388 2.63 17.9 4.84 0.45 23.13 2.64 2.87 124 8.55 95.65 16 7.59 12.8 15.9 0.243 2.37 18.2 3.21 0.77 22.18 2.61 2.91 130 8.46 95.98 17 7.77 11.3 12.6 0.222 4.85 17.3 1.68 0.85 19.83 1.79 2.41 107 8.38 91.41 18 7.85 13.3 22.3 0.399 1.90 24.1 0.83 0.42 25.33 2.78 2.91 163 8.56 92.16 19 8.01 12.4 22.0 1.09 1.16 23.0 0.86 0.52 24.39 2.62 2.89 157 8.24 91.9 20 8.10 12.5 22.8 1.05 0.13 23.0 0.73 0.44 24.18 2.87 3.16 171 8.49 101.16 21 8.23 13.3 21.3 0.62 0.39 22.9 1.45 0.57 24.86 3.13 3.26 162 11.34 136.72 Maximum 8.41 14.5 22.82 1.456 17.90 24.13 9.93 0.85 25.33 3.60 3.86 171 0.080 11.34 136.72 Minimum 7.51 10.7 2.78 0.083 0.13 4.41 0.56 0.13 13.88 1.77 2.03 53 0.030 6.54 69.93 Average 7.90 12.4 14.40 0.516 2.59 16.38 2.52 0.42 19.31 2.50 2.73 117 0.062 8.01 90.55 #Years 33 33 33 32 31 33 33 33 33 33 33 33 12 33 33 SOUTH TAHOE PUBLIC UTILITY DISTRICT HARVEY PLACE RESERVOIR DATA SUMMARY From: 1989 To: 2020 Water COD BOD Cl- TDS SS Turb EC Ca Na Mg SAR Level Flow % Ice Year mg/I mg/I mg/I mg/I mg/I NTU us/cm mg/I mg/I mg/I ft. acre-ft Cover 89 25.3 2.95 89.2 357 21.4 18.87 635 19.6 92.9 3.26 4.88 38.1 491 5 90 32.4 4.92 93.5 355 9.33 5.82 616 16.6 86.2 3.41 5.04 40.9 303 4 91 23.9 3.82 91.7 369 20.4 5.99 595 16.4 84.3 3.55 4.91 38.5 4 92 28.0 4.25 72.0 312 7.83 3.88 496 16.2 72.7 3.28 4.31 39.1 6 93 29.1 5.92 53.2 241 29.4 5.63 413 14.9 45.5 3.26 2.71 42.5 17 94 27.8 6.01 70.2 268 7.56 3.82 548 18.5 53.3 3.86 2.94 38.4 10 95 25.1 4.70 50.8 226 7.09 3.87 482 16.3 41.3 3.53 2.41 42.5 1 96 23.7 4.53 47.3 225 4.81 3.53 462 16.4 46.4 3.58 2.70 43.8 0 97 18.6 2.93 44.5 205 7.07 5.98 415 14.8 38.0 3.38 2.28 45.4 0 98 20.6 3.53 49.6 226 5.20 3.67 461 15.0 43.4 3.31 2.64 41.9 12 99 27.7 4.19 48.8 221 11.5 5.25 450 14.4 42.1 3.42 2.59 40.7 2 00 31.9 6.21 53.6 227 16.8 3.67 466 15.7 44.6 3.53 2.68 41.0 0 01 43.8 5.79 61.3 243 26.1 7.40 490 16.2 45.8 3.68 2.67 40.9 3 02 29.7 5.23 57.5 237 9.32 4.04 466 15.4 44.8 3.51 2.68 37.4 0 03 31.3 4.75 56.8 235 8.38 4.14 484 15.3 45.2 3.53 2.71 40.9 0 04 31.3 4.53 57.9 236 5.81 4.08 504 16.0 43.5 3.69 2.54 38.1 3 05 35.9 6.81 52.7 242 11.6 4.48 447 16.4 46.4 3.50 2.70 38.7 16 06 39.9 7.35 44.3 222 17.6 12.67 397 14.5 42.4 3.29 2.60 38.8 12 07 45.3 9.14 53.3 257 13.8 7.40 515 17.1 54.1 3.80 3.08 36.8 1 08 47.0 9.62 52.6 248 14.5 8.09 495 16.2 52.1 3.73 3.03 37.7 8 09 40.2 7.48 50.9 251 8.97 5.17 530 16.7 52.8 3.92 2.95 37.7 0 10 40.8 8.42 48.5 247 8.41 5.14 514 16.8 24.0 4.07 1.37 39.3 12 11 39.8 8.14 42.6 218 24.2 12.21 435 16.2 22.4 3.71 2.50 41.2 8 12 8.13 50.2 245 21.8 6.58 501 17.3 49.9 3.78 2.83 34.8 0 13 9.01 48.7 246 17.1 8.06 457 17.3 49.5 3.81 2.80 37.2 13 14 8.53 51.6 259 12.7 6.71 516 18.0 52.3 4.06 2.89 39.5 5 15 11.5 52.2 269 62.2 10.78 534 18.0 53.4 4.20 2.95 32.4 5 16 7.57 56.5 257 17.9 4.86 536 18.2 53.5 4.11 2.94 37.3 10 17 14.6 42.2 207 45.9 36.23 466 15.8 39.0 3.80 2.28 39.8 6 18 7.75 56.8 255 4.91 3.13 574 19.6 50.8 4.58 2.68 38.3 0 19 10.2 57.5 251 13.2 6.38 558 18.9 50.4 4.47 2.70 36.7 4 20 12.9 60.8 273 17.1 8.48 607 19.9 53.8 4.72 2.82 34.0 4 21 11.4 59.6 274 11.7 5.04 591 20.2 53.6 4.88 2.77 36.9 5 Maximum 47.0 14.61 93.5 369 62.20 36.23 635 20.2 92.9 4.88 5.04 45.4 491 17 Minimum 18.6 2.93 42.2 205 4.81 3.13 397 14.4 22.4 3.26 1.37 32.4 303 0 Average 32.1 7.06 56.9 255 15.80 7.30 505 16.8 50.6 3.76 2.93 39.0 397 5 #Years 23 33 33 33 33 33 33 33 33 33 33 33 2 33 SOUTH TAHOE PUBLIC UTILITY DISTRICT HARVEY PLACE RESERVOIR DATA SUMMARY From: 1989 To: 2020 Coliforms Fecal Air Algae Weeds Total Fecal/E coli Strep Temp SO4 Boron Year MPN MPN MPN C mg/L mg/L Comments 89 125 7 60 17.2 90 275 3 17 18.2 42.8 0.32 91 64 4 30 17.1 41.2 0.37 92 991 94 203 16.6 35.1 0.33 93 633 9 280 15.1 23.2 0.22 94 505 6 422 11.4 26.8 0.26 95 107 14 112 12.9 24.2 0.17 96 374 11 97 16.0 19.9 0.19 97 2 < 2 < 2 5.9 13.1 0.08 98 192 4 56 7.5 19.3 0.14 99 460 4 97 13.0 19.1 0.20 00 363 6 73 15.5 19.1 0.22 01 533 187 78 13.2 19.5 0.24 02 128 25 178 20.3 18.2 0.22 03 309 26 33 13.0 19.3 0.19 04 204 20 28 12.4 17.9 0.25 05 1,516 46 194 13.5 16.8 0.24 06 341 53 168 14.5 14.3 0.16 07 111 57 34 12.5 15.4 0.22 08 197 35 164 14.0 16.4 0.24 09 393 16 6 12.1 17.6 0.17 10 539 83 5 10.4 16.2 0.18 11 477 8 29 9.9 13.0 0.15 12 745 168 30 11.7 17.1 0.16 13 556 18 20 13.6 16.7 0.16 14 403 47 52 10.4 16.4 0.19 15 24,369 77 12.6 20.1 0.22 16 17,784 92 13.2 17.8 17 25,843 37 12.8 12.5 18 4,866 12 17.0 16.2 19 1,210 9.5 14.9 16.5 20 1,376 11 15.7 18.5 21 4,344 8 17.5 20.6 Maximum 25,843 187 422 20.3 42.8 0.37 Minimum 2 < 2 < 2 5.9 12.5 0.08 Average 2737 36 95 13.7 20.0 0.23 #Years 33 33 26 33 32 26 NO3-N &NH3-N Total Phosphorus 25 6 20 5 4 15 J J rn rn 3 E E 10 2 5 1 0 0 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 NO3-N T NH&N Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 140 500 450 120 400 100 350 J 80 J 300 a1 a1 250 E 60 E 200 40 150 100 20 50 0 0 89 90 9192 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 0910 11 12 13 14 1516 17 18 19 20 21 89 90 91 92 93 94 95 96 97 98 99 00 0102 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 -Chlorides Lioear(Chloddes) -- TDS Lloser(TDS) Harvey Place Reservoir Recycled Water Current Storage Not including 200+/-acre-foot dead pool Maximum Storage,Acre-feet: 3,800 Stored Remaining Date Acre-feet Acre-feet 01/01/16 743 3,057 02/01/16 1,185 2,615 03/01/16 1,493 2,307 04/01/16 1,875 1,925 05/01/16 2,104 1,696 06/01/16 2,322 1,478 07/01/16 2,139 1,661 08/01/16 1,304 2,496 09/01/16 595 3,205 10/01/16 72 3,728 11/01/16 243 3,557 12/01/16 479 3,321 01/01/17 940 2,860 02/01/17 1,843 1,957 03/01/17 3,082 718 04/01/17 3,460 340 05/01/17 3,005 795 06/01/17 2,617 1,183 07/01/17 2,210 1,590 08/01/17 1,626 2,174 09/01/17 878 2,922 10/01/17 114 3,686 11/01/17 220 3,580 12/01/17 544 3,256 01/01/18 878 2,922 02/01/18 1,177 2,623 03/01/18 1,410 2,390 04/01/18 1,938 1,862 05/01/18 2,246 1,554 06/01/18 2,465 1,335 07/01/18 1,927 1,873 08/01/18 1,240 2,560 09/01/18 531 3,269 10/01/18 88 3,712 11/01/18 206 3,594 12/01/18 453 3,347 01/01/19 781 3,019 02/01/19 1,131 2,669 03/01/19 1,714 2,086 04/01/19 2,210 1,590 05/01/19 2,517 1,283 06/01/19 1,991 1,809 07/01/19 1,326 2,474 08/01/19 693 3,107 09/01/19 185 3,615 10/01/19 72 3,728 11/01/19 217 3,583 12/01/19 472 3,328 01/01/20 798 3,002 02/01/20 1,063 2,737 03/01/20 1,326 2,474 04/01/20 1,573 2,227 05/01/20 1,783 2,017 06/01/20 1,896 1,904 07/01/20 1,395 2,405 08/01/20 750 3,050 09/01/20 137 3,663 10/01/20 72 3,728 11/01/20 222 3,578 12/01/20 472 3,328 01/01/21 764 3,036 02/01/21 1,050 2,750 03/01/21 1,296 2,504 04/01/21 1,564 2,236 05/01/21 1,763 2,037 06/01/21 1,908 1,892 07/01/21 1,475 2,325 08/01/21 861 2,939 09/01/21 946 2,854 10/01/21 86 3,714 11/01/21 274 3,526 12/01/21 490 3,310 01/01/22 821 2,979 EWR WR Currant Sb ge-L,ho n_Re d Harvey Place Reservoir Recycled Water Storage 4,000 3,500 3,000 as a� 2,500 L V Q 2,000 1,500 1,000 500 0 (O(O(O(O(O(O(O(Oc0c0c0c0I�I�I�f�f�f�f�f�f�f�f�l�o0000000 o0 o0 CO CO CO CO CO 0006�6�6�6�6�6�6�6�000000000000000��N �NNNN NNNNNNNNNNNNNNN NNNNNN �NMV�5(O izzW 61O N NMV�5(O izzW O N NMV�5cO izzW6iO N MV�5c0izzo061O�N�N M V u cO r co 61 .o r-o061O�N� 000000000 6��000000000 6��000000000 6��000000000��000000000��000000000��0 Storage INDIAN CREEK RESERVOIR INDIAN CREEK RESERVOIR MONITORING Indian Creek Reservoir(ICR) is a 3,160 acre-foot capacity fresh water reservoir, located in the northeast portion of Alpine County, California (Figure 1). The ICR was constructed in 1967 for the temporary storage of treated wastewater. Since 1989, all make-up water for the ICR has been provided by fresh water diversions from Indian Creek and the West Fork of the Carson River. In 2002, the Lahontan Regional Water Quality Control Board (LRWQCB) adopted draft amendments to the water quality control plan for the Lahontan Region. These amendments included Interim Target and Final Target Total Maximum Daily Load (TMDL) numerical limits for five (5) indicator parameters at the ICR: Total Phosphorus (TP); Dissolved Oxygen (DO); Secchi Depth; Chlorophyll a; and Carlson Trophic State Index (TSI). In 2005, Alex Horne Associates consultant completed a pre-design for an in-reservoir oxygenation system (a hypolimnetic oxygenation system or HOS) for the ICR. Operation of the oxygenation system is designed to improve water quality by reducing phosphorus and chlorophyll a levels; improve fisheries habitat by increasing DO content within the hypolimnion; and lower the TSI of the ICR. ICR TMDL Objectives Indicator Interim Target Final Target (Attained by 2013) (Attained by 2024) Total Phosphorus :50.04 mg/L, annual :50.02 mg/L, annual mean (TP) mean Dissolved Oxygen 30-day mean — 6.5 Whichever is most restrictive: (DO) mg/L i) DO depressed not more than 7-day mean min. — 5.0 10%; mg/L ii)DO % Saturation >_ 80%; or 1-day min. — 4.0 mg/L iii) DO >_7.0 mg/L Secchi Depth (SD) Summer mean >_ 2 meters Chlorophyll a (Chl- Summer mean <_ 10 mg/cu meter a) Trophic State Index Composite index <_ 45 units (TS I) The HOS is comprised of a Speece Cone, which was installed at ICR in Nov/December 2008. The equipment building, electrical and controls instrumentation installation was completed near the start of the 2nd quarter of 2009. Regular operation of the HOS started in June 2009. Indian Creek Reservoir Sample Sites ry. Z-1 _ ~+ ` #ems •,.,r,.,„ ' - Y t All dL r LL PRO S Ila i .L.• ti'_ti •• f s SOUTH TAHOE PUBLIC UTILITY DISTRICT INDIAN CREEK RESERVOIR DATA SUMMARY 2021 Secchi NI-13+ Depth Total P D.O. D.O.Chlorophyll Depth NH4 NH3-N Org-N TKN NO3-N NO2-N Total N PO4-P Date Site Ft mg/I mg/I %SAT mg/m' ft. mg/L mg/I mg/I mg/I mg/I mg/I mg/L mg/I 1/20/2021 ICR-01 Inaccessible 1/20/2021 ICR-03 0.5 0.031 12.1 91.0 10 4.8 <0.020 0.00 0.680 0.68 <0.010 <0.010 0.68 <0.010 1/20/2021 ICR-03 23.0 0.035 11.8 89.0 9 <0.020 0.00 0.680 0.68 <0.010 <0.010 0.68 <0.010 1/20/2021 ICR-05 0.5 0.030 11.9 88.6 6 5.0 <0.020 0.00 0.670 0.67 <0.010 <0.010 0.67 <0.010 2/17/2021 ICR-01 Inaccessible 3/30/2021 ICR-01 0.5 0.035 11.0 92.8 13 4.92 <0.020 0.00 0.839 0.839 <0.010 <0.010 0.839 <0.010 3/30/2021 ICR-01 18.0 0.039 10.9 90.9 12 <0.020 0.00 0.899 0.899 <0.010 <0.010 0.899 <0.010 3/30/2021 ICR-01 36.1 0.050 10.8 89.9 12 <0.020 0.00 1.03 1.03 <0.010 <0.010 1.03 <0.010 3/30/2021 ICR-03 0.5 0.036 11.7 98.7 12 4.53 <0.020 0.00 0.877 0.877 <0.010 <0.010 0.877 <0.010 3/30/2021 ICR-03 21.0 0.045 10.4 85.5 12 <0.020 0.00 0.945 0.945 <0.010 <0.010 0.945 <0.010 3/30/2021 ICR-05 0.5 0.035 10.7 90.1 10 4.38 <0.020 0.00 0.846 0.846 <0.010 <0.010 0.846 <0.010 4/21/2021 ICR-01 0.5 0.030 10.0 96.0 9 5.55 <0.020 0.00 0.825 0.825 <0.010 <0.010 0.825 <0.010 4/21/2021 ICR-01 18.1 0.036 8.90 81.9 10 <0.020 0.00 0.876 0.876 <0.010 <0.010 0.876 <0.010 4/21/2021 ICR-01 36.0 0.054 5.10 45.6 10 <0.020 0.00 0.885 0.885 <0.010 <0.010 0.885 <0.010 4/21/2021 ICR-03 0.5 0.030 10.0 95.5 < 1 NA <0.020 0.00 0.838 0.838 <0.010 <0.010 0.838 <0.010 4/21/2021 ICR-03 21.0 0.035 9.50 87.8 1 <0.020 0.00 0.854 0.854 <0.010 <0.010 0.854 <0.010 4/21/2021 ICR-05 0.5 0.028 9.90 93.5 < 1 5.72 <0.020 0.00 0.839 0.839 <0.010 <0.010 0.839 <0.010 5/18/2021 ICR-01 0.5 0.028 8.47 87.4 7 7.4 <0.020 0.00 0.807 0.807 <0.010 <0.010 0.807 <0.010 5/18/2021 ICR-01 12.0 0.028 8.43 85.9 8 <0.020 0.00 0.856 0.856 <0.010 <0.010 0.856 <0.010 5/18/2021 ICR-01 33.0 0.073 0.20 1.8 3 0.133 0.00 0.786 0.919 <0.010 <0.010 0.919 0.014 5/18/2021 ICR-03 0.5 0.028 8.50 87.4 5 6.60 <0.020 0.00 0.846 0.846 <0.010 <0.010 0.846 <0.010 5/18/2021 ICR-03 18.0 0.041 6.55 65.0 7 <0.020 0.00 0.986 0.986 <0.010 <0.010 0.986 <0.010 5/18/2021 ICR-05 0.5 0.028 8.58 87.9 6 7.04 <0.020 0.00 0.823 0.823 <0.010 <0.010 0.823 <0.010 6/16/2021 ICR-01 0.5 0.024 8.15 86.6 < 1 11.4 <0.020 0.00 0.799 0.799 <0.010 <0.010 0.799 <0.010 6/16/2021 ICR-01 27.0 0.033 7.25 75.6 3 <0.020 0.00 0.830 0.830 <0.010 <0.010 0.830 <0.010 6/16/2021 ICR-01 36.2 0.080 1.11 10.8 < 1 0.253 0.00 1.08 1.33 <0.010 <0.010 1.33 0.011 6/16/2021 ICR-03 0.5 0.024 8.17 87.2 2 11.6 <0.020 0.01 0.805 0.805 <0.010 <0.010 0.805 <0.010 6/16/2021 ICR-03 21.0 0.036 8.43 87.7 5 <0.020 0.01 0.839 0.839 <0.010 <0.010 0.839 <0.010 6/16/2021 ICR-05 0.5 0.025 8.25 88.3 2 9.53 <0.020 0.01 0.795 0.795 <0.010 <0.010 0.795 <0.010 7/28/2021 ICR-01 0.5 0.041 7.67 85.0 6 9.28 0.022 0.01 0.914 0.936 <0.010 <0.010 0.936 0.010 7/28/2021 ICR-01 18.0 0.044 7.40 81.7 5 0.027 0.01 0.897 0.924 <0.010 <0.010 0.924 <0.010 7/28/2021 ICR-01 32.9 0.079 3.44 37.8 4 0.169 0.02 0.891 1.06 <0.010 <0.010 1.06 0.018 7/28/2021 ICR-03 0.5 0.041 7.54 84.0 3 8.36 0.023 0.01 0.878 0.901 <0.010 <0.010 0.901 0.011 7/28/2021 ICR-03 18.0 0.045 7.24 79.5 4 0.023 0.01 0.875 0.898 <0.010 <0.010 0.898 <0.010 7/28/2021 ICR-05 0.5 0.045 8.17 91.3 4 5.02 <0.020 0.01 0.934 0.934 <0.010 <0.010 0.934 <0.010 8/26/2021 ICR-01 0.5 0.068 9.63 102.0 37 4.57 <0.020 0.02 1.37 1.37 <0.010 <0.010 1.37 0.010 8/26/2021 ICR-01 18.1 0.054 6.64 69.2 13 <0.020 0.01 1.13 1.13 <0.010 <0.010 1.13 0.013 8/26/2021 ICR-01 33.0 0.077 4.42 45.9 6 0.161 0.07 1.08 1.24 <0.010 <0.010 1.24 0.034 8/26/2021 ICR-03 0.5 0.071 9.66 103.0 29 4.58 <0.020 0.02 1.41 1.41 <0.010 <0.010 1.41 <0.010 8/26/2021 ICR-03 18.0 0.050 8.81 91.7 13 <0.020 0.01 1.13 1.13 <0.010 <0.010 1.13 <0.010 8/26/2021 ICR-05 0.5 0.059 10.0 107.0 21 NA <0.020 0.02 1.32 1.32 <0.010 <0.010 1.32 <0.010 9/22/2021 ICR-01 0.5 0.068 8.85 89.1 16 5.68 <0.020 0.01 1.28 1.28 <0.010 <0.010 1.28 0.024 9/22/2021 ICR-01 15.0 0.076 8.82 88.8 16 <0.020 0.01 1.33 1.33 <0.010 <0.010 1.33 0.016 9/22/2021 ICR-01 27.0 0.067 6.41 63.8 14 <0.020 0.01 1.25 1.25 <0.010 <0.010 1.25 0.012 9/22/2021 ICR-03 0.5 0.065 8.63 86.8 19 4.84 <0.020 0.02 1.27 1.27 <0.010 <0.010 1.27 0.011 9/22/2021 ICR-03 15.1 0.059 7.88 78.8 14 <0.020 0.01 1.20 1.20 <0.010 <0.010 1.20 0.016 9/22/2021 ICR-05 0.5 0.120 11.1 113.0 31 2.84 <0.020 0.02 1.64 1.64 <0.010 <0.010 1.64 0.021 10/27/2021 ICR-01 0.5 0.122 8.73 74.7 1 4.14 0.295 0.00 1.29 1.58 0.086 <0.010 1.67 0.056 10/27/2021 ICR-01 15.0 0.133 8.62 73.7 2 0.295 0.00 1.36 1.65 0.086 <0.010 1.74 0.055 10/27/2021 ICR-01 27.0 0.131 8.53 72.7 2 0.294 0.00 1.34 1.63 0.088 <0.010 1.72 0.051 10/27/2021 ICR-03 0.5 0.127 8.89 76.1 2 4.02 0.299 0.00 1.23 1.53 0.095 <0.010 1.63 0.055 10/27/2021 ICR-03 18.0 0.147 8.38 70.7 2 0.302 0.00 1.53 1.83 0.103 <0.010 1.93 0.052 10/27/2021 ICR-05 0.5 0.161 8.76 75.2 2 4.42 0.319 0.00 1.26 1.58 0.105 <0.010 1.69 0.054 November ICR-01 Inaccessible December ICR-01 Inaccessible Maximum 36.2 0.161 12.10 113.0 37 11.60 0.319 0.07 1.640 1.830 0.105 <0.010 1.930 0.056 Minimum 0.5 0.024 0.20 1.8 < 1 2.84 <0.020 0.00 0.670 0.670 <0.010 <0.010 0.670 <0.010 Average 11.5 0.058 8.45 80.6 8.7 6.09 0.066 0.007 1.012 1.064 0.020 <0.010 1.075 0.017 #Measurements 51 51 51 51 51 24 51 51 51 51 51 51 51 51 SOUTH TAHOE PUBLIC UTILITY DISTRICT INDIAN CREEK RESERVOIR DATA SUMMARY 2021 Lake Depth Temp Alk MBAS COD BOD Cl TDS S.S. Turb EC Ca Na Mg SAR Level %Ice Date Site Ft C pH mg/I mg/I mg/I mg/I mg/I mg/I mg/I NTU uS/cm mg/I mg/I mg/I ft. Cover Algae Weeds 1/20/2021 ICR-01 Inaccessible 10 No No 1/20/2021 ICR-03 0.5 3.5 8.24 1.52 2.8 110 1/20/2021 ICR-03 23.0 3.6 8.50 1.51 3.2 111 1/20/2021 ICR-05 0.5 3.2 8.01 1.50 3.0 111 2/17/2021 ICR-01 Inaccessible 3/30/2021 ICR-01 0.5 8.0 8.72 49.1 1.65 70 5.37 3.1 112 0 No No 3/30/2021 ICR-01 18.0 7.6 8.68 48.5 1.58 71 5.70 3.4 112 3/30/2021 ICR-01 36.1 7.5 8.58 49.3 1.57 66 5.28 3.2 112 3/30/2021 ICR-03 0.5 7.9 8.57 48.9 1.56 65 4.94 3.1 111 3/30/2021 ICR-03 21.0 7.1 8.49 49.3 1.56 71 6.88 3.8 112 3/30/2021 ICR-05 0.5 8.0 8.32 49.3 1.56 70 4.72 3.0 112 4/21/2021 ICR-01 0.5 13.3 8.75 1.57 2.2 115 0 NO NO 4/21/2021 ICR-01 18.1 11.8 8.34 1.56 2.7 116 4/21/2021 ICR-01 36.0 10.6 7.42 1.58 3.2 116 4/21/2021 ICR-03 0.5 13.5 8.87 1.57 2.1 115 4/21/2021 ICR-03 21.0 12.0 8.66 1.56 2.6 115 4/21/2021 ICR-05 0.5 12.9 8.69 1.59 2.4 115 5/18/2021 ICR-01 0.5 16.8 8.72 51.2 1.64 81 4.00 2.2 106 0 No Yes 5/18/2021 ICR-01 12.0 16.2 8.55 50.8 1.60 79 4.04 2.4 105 5/18/2021 ICR-01 33.0 11.2 6.95 53.0 1.63 77 3.12 2.5 111 5/18/2021 ICR-03 0.5 16.7 8.99 51.2 1.60 80 4.14 2.3 105 5/18/2021 ICR-03 18.0 15.0 8.4 51.4 1.59 79 4.40 2.8 106 5/18/2021 ICR-05 0.5 16.5 8.91 51.0 1.58 79 4.10 2.4 105 6/16/2021 ICR-01 0.5 18.2 8.72 1.58 1.1 108 0 No No 6/16/2021 ICR-01 27.0 17.4 8.47 1.58 1.3 109 6/16/2021 ICR-01 36.2 14.2 7.46 1.65 2.4 118 6/16/2021 ICR-03 0.5 18.5 9.06 1.58 1.3 109 6/16/2021 ICR-03 21.0 17.2 9.10 1.56 1.3 108 6/16/2021 ICR-05 0.5 18.7 9.05 1.58 1.2 109 7/28/2021 ICR-01 0.5 20.4 9.14 1.51 2.2 109 0 Yes Yes 7/28/2021 ICR-01 18.0 20.2 9.22 1.51 4.3 109 7/28/2021 ICR-01 32.9 19.9 8.46 1.53 2.6 112 7/28/2021 ICR-03 0.5 20.7 9.19 1.52 2.2 109 7/28/2021 ICR-03 18.0 19.9 9.10 1.51 2.6 108 7/28/2021 ICR-05 0.5 20.8 9.41 1.49 1.5 109 8/26/2021 ICR-01 0.5 18.2 10.00 53.2 1.58 80 9.59 8.8 115 0 Yes Yes 8/26/2021 ICR-01 18.1 17.3 9.69 52.8 1.55 80 5.95 4.7 111 8/26/2021 ICR-01 33.0 17.1 9.39 54.5 1.57 81 4.78 4.6 112 8/26/2021 ICR-03 0.5 18.3 9.94 53.0 1.53 80 8.83 9.2 115 8/26/2021 ICR-03 18.0 17.3 9.85 53.0 1.53 80 4.78 6.1 113 8/26/2021 ICR-05 0.5 18.5 9.96 53.0 1.52 76 7.78 8.7 115 9/22/2021 ICR-01 0.5 15.7 9.79 1.63 6.6 130 0 Yes Yes 9/22/2021 ICR-01 15.0 15.7 9.80 1.59 5.4 130 9/22/2021 ICR-01 27.0 15.2 9.64 1.58 6.6 126 9/22/2021 ICR-03 0.5 15.6 10.03 1.58 7.3 128 9/22/2021 ICR-03 15.1 15.4 9.98 1.59 5.6 128 9/22/2021 ICR-05 0.5 16.4 10.48 1.64 7.5 142 10/27/2021 ICR-01 0.5 8.6 7.52 1.89 6.2 123 0 Yes Yes 10/27/2021 ICR-01 15.0 8.5 7.58 1.87 6.4 123 10/27/2021 ICR-01 27.0 8.4 7.63 1.87 8.3 123 10/27/2021 ICR-03 0.5 8.6 7.64 1.85 7.0 122 10/27/2021 ICR-03 18.0 8.0 7.62 1.85 8.1 123 10/27/2021 ICR-05 0.5 8.6 7.80 1.86 7.2 124 November ICR-01 Inaccessible December ICR-01 Inaccessible Maximum 36.2 20.8 10.48 54.5 1.89 81 9.59 9.2 142.0 10 Minimum 0.5 3.2 6.95 48.5 1.49 65 3.12 1.1 105.0 0 Average 11.5 13.7 8.79 51.3 1.60 76 5.46 4.1 114.8 1 #Measurements 51 51 51 18 0 0 0 51 18 18 51 51 0 0 0 0 0 9 9 9 SOUTH TAHOE PUBLIC UTILITY DISTRICT INDIAN CREEK RESERVOIR DATA SUMMARY 2021 Colifonns Fecal Air Depth Total Fecal/E.C Ii Strap Temp SO4 Boron Fe Mn Date Site Ft MPN MPN MPN C mg/L mg/L ug/L ug/L Comments 1/20/2021 ICR-01 Inaccessible 1.5 1/20/2021 ICR-03 0.5 2 < 1 0.982 1/20/2021 ICR-03 23.0 0.978 1/20/2021 ICR-05 0.5 2 < 1 0.972 2/17/2021 ICR-01 Inaccessible 3/30/2021 ICR-01 0.5 3.1 < 1 NA 0.965 3/30/2021 ICR-01 18.0 0.953 3/30/2021 ICR-01 36.1 0.941 3/30/2021 ICR-03 0.5 1 < 1 0.934 3/30/2021 ICR-03 21.0 0.931 3/30/2021 ICR-05 0.5 1 < 1 0.927 4/21/2021 ICR-01 0.5 1 < 1 9.3 1.10 4/21/2021 ICR-01 18.1 1.08 4/21/2021 ICR-01 36.0 1.10 4/21/2021 ICR-03 0.5 1 < 1 1.09 4/21/2021 ICR-03 21.0 1.10 4/21/2021 ICR-05 0.5 1 < 1 1.12 5/18/2021 ICR-01 0.5 1 < 1 19.4 1.26 5/18/2021 ICR-01 12.0 1.24 5/18/2021 ICR-01 33.0 1.13 5/18/2021 ICR-03 0.5 2 1 1.24 5/18/2021 ICR-03 18.0 1.22 5/18/2021 ICR-05 0.5 2 < 1 1.22 6/16/2021 ICR-01 0.5 8.6 < 1 23.9 1.12 6/16/2021 ICR-01 27.0 1.12 6/16/2021 ICR-01 36.2 1.07 6/16/2021 ICR-03 0.5 3 < 1 1.12 6/16/2021 ICR-03 21.0 1.12 6/16/2021 ICR-05 0.5 3.1 < 1 1.11 7/28/2021 ICR-01 0.5 131 < 1 23.3 1.03 7/28/2021 ICR-01 18.0 1.03 7/28/2021 ICR-01 32.9 1.00 7/28/2021 ICR-03 0.5 192 < 1 1.03 7/28/2021 ICR-03 18.0 1.01 7/28/2021 ICR-05 0.5 276 1 1.01 8/26/2021 ICR-01 0.5 39.3 < 1 32.7 1.29 8/26/2021 ICR-01 18.1 1.26 8/26/2021 ICR-01 33.0 1.25 8/26/2021 ICR-03 0.5 53.8 < 1 1.27 8/26/2021 ICR-03 18.0 1.25 8/26/2021 ICR-05 0.5 30.5 < 1 1.25 9/22/2021 ICR-01 0.5 6.2 < 1 19.5 1.03 9/22/2021 ICR-01 15.0 1.03 9/22/2021 ICR-01 27.0 1.02 9/22/2021 ICR-03 0.5 32.7 < 1 1.02 9/22/2021 ICR-03 15.1 1.02 9/22/2021 ICR-05 0.5 435 3.1 0.988 10/27/2021 ICR-01 0.5 1553 20.1 16.8 1.32 10/27/2021 ICR-01 15.0 1.30 10/27/2021 ICR-01 27.0 1.31 10/27/2021 ICR-03 0.5 2420 25.9 1.32 10/27/2021 ICR-03 18.0 1.35 10/27/2021 ICR-05 0.5 2420 22.8 1.35 November ICR-01 Inaccessible December ICR-01 Inaccessible Maximum 36.2 2420 26 32.7 1.35 Minimum 0.5 1 <1 1.5 0.93 Average 11.5 293 4 18.3 1.12 #Measurements 51 26 26 0 8 51 0 0 0 SOUTH TAHOE PUBLIC UTILITY DISTRICT INDIAN CREEK RESERVOIR DATA SUMMARY From: 1980 To: 2021 Secchi NH3+ Total P D.O. D.O. Chlorophyll Depth NH4 NH3-N Org-N TKN NO3-N NO2-N Total N PO4-P Year mg/I mg/I %SAT mg/m' ft. mg/L mg/I mg/I mg/I mg/I mg/I mg/L mg/I 80 0.305 8.75 88.8 1.227 0.080 1.351 2.578 3.465 0.201 6.244 0.212 81 0.267 10.26 122.8 0.404 0.148 1.335 1.692 7.454 0.315 9.405 0.176 82 0.531 9.77 113.5 0.925 0.105 1.521 2.417 4.329 0.190 6.916 0.421 83 0.575 10.22 116.6 0.474 0.139 1.223 1.697 3.419 0.125 5.241 0.472 84 0.459 10.35 115.8 0.476 0.120 1.350 1.799 3.356 0.154 5.309 0.339 85 0.219 9.93 112.6 0.629 0.142 1.585 2.212 2.722 0.118 5.052 0.092 86 0.164 9.54 111.0 1.277 0.273 1.577 2.854 3.080 0.147 6.082 0.059 87 0.145 9.00 101.7 2.927 0.331 1.755 4.683 3.590 0.174 8.447 0.058 88 0.095 9.13 105.3 4.661 0.097 2.194 6.855 6.406 0.161 13.421 0.023 89 0.075 9.26 107.5 2.970 0.160 1.053 4.023 4.892 0.108 9.023 0.020 90 0.154 9.02 104.9 0.140 0.052 1.178 1.318 0.705 0.028 2.051 0.078 91 0.299 8.91 102.9 0.206 0.074 1.889 2.095 0.289 0.015 2.374 0.143 92 0.318 8.90 105.4 0.082 0.040 2.828 2.910 0.038 0.011 2.959 0.136 93 0.778 8.72 102.6 0.171 0.029 8.453 8.624 0.150 0.013 8.054 0.115 94 0.179 8.15 91.0 0.138 0.038 1.573 1.711 0.039 0.014 1.764 0.080 95 0.344 8.57 102.1 0.203 0.050 5.542 5.744 0.068 0.012 5.823 0.061 96 0.600 9.00 106.3 0.100 0.030 6.110 6.220 0.040 0.010 6.260 0.020 97 0.062 9.05 102.4 0.185 0.015 0.883 1.068 0.083 0.029 1.181 0.018 98 0.049 8.61 102.1 0.088 0.013 0.655 0.743 0.089 0.010 0.840 0.011 99 0.076 8.50 94.8 3.98 0.072 0.010 0.913 0.985 0.023 < 0.010 1.018 0.012 00 0.078 6.70 71.8 24.0 2.67 0.154 0.011 0.927 1.080 0.070 < 0.010 1.161 0.013 01 0.053 6.12 72.6 11.4 5.62 0.054 0.011 0.860 0.913 0.010 < 0.010 0.933 0.015 02 0.048 6.76 74.2 13.3 7.47 0.078 0.016 0.825 0.903 0.038 < 0.010 0.951 0.015 03 0.044 7.87 86.6 14.2 8.21 0.119 0.024 0.759 0.881 0.033 < 0.010 0.922 0.013 04 0.042 6.43 74.5 15.6 10.25 0.105 0.013 0.845 0.941 0.030 < 0.010 0.982 0.015 05 0.043 7.25 80.4 9.7 6.50 0.094 0.011 0.870 0.964 0.043 < 0.010 0.988 0.013 06 0.069 6.54 69.4 13.9 5.15 0.160 < 0.010 0.621 0.781 0.045 < 0.010 0.836 0.015 07 0.057 6.66 76.1 14.8 4.72 0.106 0.013 0.899 1.005 0.031 < 0.010 1.047 0.013 08 0.071 6.66 80.2 21.0 3.77 0.076 0.011 1.149 1.225 0.048 < 0.010 1.282 0.018 09 0.067 8.28 98.9 16.2 4.48 0.046 0.013 1.249 1.295 0.021 < 0.010 1.326 0.013 10 0.042 7.80 91.8 11.1 7.69 0.029 0.011 0.801 0.829 0.019 < 0.010 0.858 0.011 11 0.041 6.97 80.6 9.2 8.19 0.055 0.010 0.512 0.568 0.013 < 0.010 0.591 0.012 12 0.037 7.87 90.5 4.8 10.95 0.086 0.015 0.667 0.754 0.034 < 0.010 0.798 0.012 13 0.035 8.45 98.4 7.4 10.64 0.049 0.020 0.727 0.776 0.027 < 0.011 0.797 0.012 14 0.037 9.07 91.2 9.9 7.25 0.041 0.021 0.751 0.782 0.012 < 0.010 0.786 0.012 15 0.045 9.74 93.8 19.9 7.85 0.031 0.022 0.992 1.023 0.013 < 0.010 1.028 0.010 16 0.034 9.37 88.1 10.3 9.87 0.039 < 0.020 0.660 0.691 0.027 < 0.010 0.714 0.011 17 0.047 8.25 75.1 16.1 5.54 0.071 < 0.020 0.517 0.581 0.020 < 0.010 0.593 0.012 18 0.045 8.59 81.3 15.7 4.36 0.031 < 0.020 0.679 0.697 0.012 < 0.010 0.703 0.012 19 0.044 8.70 80.6 14.6 3.57 0.046 0.003 0.699 0.728 0.010 < 0.010 0.731 0.010 20 0.041 8.80 81.7 14.7 5.85 0.040 0.006 0.669 0.699 0.010 < 0.010 0.700 0.011 21 0.058 8.45 80.6 8.7 6.09 0.066 0.007 1.012 1.064 0.020 < 0.010 1.075 0.017 Maximum 0.778 10.35 122.8 24.0 10.95 4.661 0.331 8.453 8.624 7.454 0.315 13.421 0.472 Minimum 0.034 6.12 69.4 4.8 2.67 0.029 < 0.003 0.512 0.568 0.010 < 0.010 0.591 0.010 Average 0.161 8.45 93.5 13.5 6.55 0.451 0.054 1.492 1.938 1.067 0.049 3.030 0.067 #Years 42 42 42 22 23 42 42 42 42 42 42 42 42 Note:Chromogenic Substrate test for Total Coliform and E.coli begun in November 2014 SOUTH TAHOE PUBLIC UTILITY DISTRICT INDIAN CREEK RESERVOIR DATA SUMMARY From: 1980 To: 2021 Lake Temp Alk MBAS COD BOD Cl, TDS S.S. Turb EC Ca Na Mg SAR Level %Ice Algae Weeds Year C pH mg/I mg/I mg/I mg/I mg/I mg/I mg/I NTU uS/cm mg/I mg/I mg/I ft. Cover 80 12.9 8.47 75 0.05 24.8 2.80 132.2 459 8.16 2.20 605 64.53 72.33 2.37 2.38 49.81 4 81 14.4 9.3 78 0.04 24.1 2.23 103.1 457 5.74 2.22 653 72.00 48.50 1.94 1.53 49.20 0 82 12.6 8.74 91 0.04 25.7 2.73 82.4 363 8.84 3.74 579 59.34 42.95 2.46 1.47 52.36 7 83 12.3 9.15 101 0.03 22.8 2.28 81.2 344 4.69 3.56 553 55.39 43.94 2.57 1.56 51.86 1 84 12.4 9.12 115 0.03 24.1 3.03 92.2 381 8.35 3.67 627 61.83 61.36 2.52 2.07 51.42 2 85 13.5 9.04 75 0.05 31.1 4.63 107 405 15.64 6.62 682 43.43 83.58 2.73 3.44 49.38 8 86 14.2 8.88 55 0.05 28.9 3.71 72.9 315 19.44 10.73 517 23.43 73.96 2.75 3.83 48.87 0 87 12.9 8.4 74 0.03 28.8 4.69 114 450 14.34 4.44 766 29.75 110.92 3.14 5.21 46.10 8 88 13.6 7.74 60 0.03 14.7 5.12 138 509 19.00 3.01 891 24.50 134.17 3.26 6.74 45.99 4 89 12.9 8.84 47 0.02 21.8 2.05 113 457 7.10 3.68 786 24.26 111.58 2.88 5.69 41.43 13 90 13.8 9.55 67 0.02 27.8 2.42 82.5 426 8.33 4.38 687 35.08 92.33 3.03 4.02 27.00 14 91 13.1 9.23 69 0.02 42.2 8.27 27.6 205 20.36 17.38 297 22.45 32.00 2.61 1.68 17 92 13.8 9.55 74 0.03 46.3 3.50 18.6 166 13.75 5.48 257 21.58 24.50 2.43 1.34 15 93 13.1 8.73 55 0.03 129.3 21.00 5.93 109 81.91 24.43 135 12.98 9.69 2.17 0.66 13 94 11.4 9.42 67 0.02 38.7 5.12 8.10 130 7.16 5.35 168 18.29 13.07 2.46 0.76 15 95 13.2 8.66 54 0.02 31.4 6.59 3.86 98 28.68 8.02 124 12.83 8.28 2.27 0.55 44.48 8 96 13.3 9.12 47 0.02 99.4 17.48 1.70 70 71.90 19.45 108 11.29 6.46 2.23 0.46 50.05 0 97 12.5 8.77 40 0.02 19.1 2.97 1.47 64 12.86 6.08 91 9.70 5.51 1.91 0.42 47.44 2 98 12.3 8.32 43 0.02 16.1 2.43 1.50 66 8.47 4.34 99 9.97 5.88 1.77 0.45 45.65 11 99 13.1 8.17 43 0.02 20.3 2.83 1.33 82 14.63 11.13 97 10.29 5.92 1.97 0.44 45.50 00 10.3 8.24 48 19.3 2.09 1.32 96 11.58 15.15 105 10.70 5.92 1.96 0.44 01 13.2 8.25 50 24.2 1.68 1.41 79 9.16 12.47 109 02 11.0 8.46 48 21 1.50 1.42 77 4.19 5.79 105 03 10.0 8.29 48 19.7 1.74 1.82 71 3.06 4.33 106 04 14.0 8.45 48 17.9 1.78 2.05 68 4.50 3.81 104 10.10 7.46 1.91 0.56 05 11.5 8.15 48 18.2 1.73 1.89 72 3.71 3.78 102 0 06 10.0 7.65 42 24.3 1.80 1.38 72 5.64 9.35 91 2 07 12.6 8.41 51 29.2 2.97 1.66 85 6.00 8.34 113 11.03 6.89 2.20 0.50 9 08 13.4 8.53 54 26.4 2.09 103 6.48 17.21 118 2 09 13.9 8.85 52 32.5 2.09 89 6.65 10.38 119 0 10 13.4 8.38 48 26.9 1.83 75 4.59 5.97 105 0 11 13.7 7.60 40 21.2 1.02 70 3.19 2.95 81 0 12 13.2 8.37 49 0.92 73 1.92 2.47 96 0 13 12.8 8.43 50 1.12 71 2.22 1.73 99 12 14 12.2 8.61 49 1.17 66 3.35 2.81 102 0 15 14.3 9.13 52 1.35 75 3.04 3.73 111 9 16 13.2 8.26 48 1.62 73 2.31 2.26 99 7 17 12.2 7.58 37 1.16 66 5.18 6.87 78 9 18 13.8 7.80 41 1.2 61 9.40 8.26 86 10 19 12.8 8.01 39 1.25 59 10.42 9.23 84 5 20 12.9 8.78 45 1.31 67 7.09 5.59 100 1 21 13.7 8.79 51 1.60 76 5.46 4.05 115 1 Maximum 14.4 9.55 115 0.05 129.3 21.00 137.9 509 81.91 24.43 891 72.00 134.17 3.26 6.74 52.36 17 Minimum 10.0 7.58 37 0.02 14.7 1.50 0.9 59 1.92 1.73 78 9.70 5.51 1.77 0.42 27.00 0 Average 12.8 8.58 56 0.03 31.2 4.33 29.1 171 11.87 7.06 261 28.47 43.79 2.41 2.01 46.66 6 #Years 42 42 42 20 32 28 42 42 42 42 42 23 23 23 23 16 36 0 0 Note:Chroi SOUTH TAHOE PUBLIC UTILITY DISTRICT INDIAN CREEK RESERVOIR DATA SUMMARY From 1980 To: 2021 Coliforms Fecal Air Total Fecal/E.coli Strep Temp SO4 Boron Fe Mn Year MPN MPN MPN C mg/L mg/L ug/L ug/L Comments 80 12.4 81 18.1 82 15.4 83 97 10 40 14.5 84 238 4 186 16.0 85 231 4 203 17.1 86 173 5 419 18.7 87 72 6 38 17.2 88 330 5 166 17.2 89 219 6 208 15.7 90 166 5 64 18.0 91 77 2 28 17.8 34.33 0.13 92 265 4 91 17.2 18.08 0.11 93 519 7 259 14.9 8.32 0.06 94 477 13 54 11.5 7.48 0.06 95 584 4 26 12.4 5.39 0.03 96 186 2 189 16.7 2.59 0.04 97 75 7 119 15.1 3.43 0.02 98 154 3 149 8.2 2.75 0.02 99 50 6 30 15.5 4.74 0.02 00 7 < 2 3 19.2 5.50 0.03 1,180 46 01 200 < 2 2 16.5 4.75 0.02 547 67 02 29 < 3 27 24.3 4.90 0.02 318 31 03 9 < 4 3 13.6 3.21 0.02 218 82 04 7 2 4 18.0 2.54 0.03 222 28 05 16 2 24 16.2 1.99 0.02 307 36 06 49 3 5 13.9 1.58 0.02 773 82 07 6 2 2 20.1 3.42 0.02 614 35 08 15 2 3 17.5 4.68 0.02 1,237 50 09 230 2 2 14.8 4.66 0.02 794 24 10 403 4 2 13.6 3.72 0.01 264 21 11 376 5 5 13.1 1.30 0.01 387 32 12 24 2 3 16.2 1.21 0.01 169 22 13 32 2 7 15.4 1.83 178 20 14 146 4 2 15.2 2.50 15 354 3 17.8 2.70 16 341 1 16.5 3.08 17 84 2 14.2 1.50 478 23 18 117 2 21.3 2.16 19 90 1 16.2 1.34 20 31 2 19.7 1.00 21 293 4 18.3 1.12 Maximum 584 13 419 24.3 34.33 0.13 1,237 82 Minimum 6 1 2 8.2 1.00 0.01 169 20 Average 174 4 74 16.2 4.77 0.03 512 40 #Years 39 39 32 42 31 22 15 15 Note:Chroi INDIAN CREEK RESEREVOIR Total Phosphorus Chlorophyll a 0.20 50 0.15 40 J M 30 a1 0.10 E E tm £ 20 0.05 10 0.00 0 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 Series1 A Chlorophyll a Linear(Chlorophyll a) Secchi Depth NO3-N &NH3-N 0 10 5 9 10 8 d w 15 3 6 rn 20 J £ a1 5 O 25 E 4 w d 30 3 LL 35 2 40 1 45 0 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 808182838485868788899091929394959697989900010203040506070809101112131415161718192021 —A--Secchi Depth Linear(Secchi Depth) - NO3-N 0 NH3-N INDIAN CREEK RESEREVOIR Chlorides Total Dissolved Solids 150 700 140 650 130 A 600 120 550 110 500 100 450 J 90 400 800 rn 350 60 £ 300 50 250 40 200 30 150 20 100 10 50 0 808182838485868788899091929394959697989900010203 O 040506070809101112131415161718192021 808182838485868788899091929394959697989900010203040506070809101112131415161718192021 Chlorides Linear(Chlorides) TDS Linear(TDS) pH 12 11 10 9 8 7 6 5 4 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 1 7 18 19 20 21 pH ALPINE COUNTY MONITORING ALPINE COUNTY MONITORING This monitoring program was developed with the assistance of the U.S. Department of Agriculture's Soil Conservation Service and the California State Water Quality Control Board, Lahontan Region. In each category of sample (soil, groundwater, and surfacewater), the sites are reported with tables showing the monthly results for 2021 and the yearly averages since monitoring was initiated. Trends are plotted for parameters indicative of wastewater. Groundwater, surfacewater and soil quality data for 2021 are summarized below. Fourteen new monitoring wells were drilled in Alpine County in 2011. These 14 new wells were first monitored monthly in 2012. Wells ACMW-20 thru ACMW-26 are required to be monitored in our reclamation permit. Several of these wells replaced domestic wells (GW-XX) and monitoring wells. In 2015 the regional Board reduced sampling frequency for all monitoring wells from monthly to quarterly. The Regional Board also replaced Total Coliform monitoring by the multiple tube fermentation method with E. coli monitoring using the Idexx Colilert QuantiTray method (chromogenic substrate). The water quality results obtained from monitoring wells ACMW-13 thru ACMW-19 provide data needed to evaluate potential changes in water quality from the use of new irrigation fields designed for the application and temporary storage of reclaimed wastewater in Diamond Valley. The 2005 Arsenic results for the GW sites (domestic wells or potable water wells)should be viewed with caution; these results may be invalid. Domestic wells that previously showed no Arsenic had detectable Arsenic during 2005. The domestic wells that had previously showed detectable Arsenic all had significant increases in the concentration of Arsenic. This did not happen in the monitoring wells. All monitoring wells had either no detectable Arsenic or had the same concentration of Arsenic as in previous years. Surfacewaters Nitrate-N for surface waters was performed using the Brucine method prior to March 1983. Beginning in March 1983, the cadmium reduction method was used for all Nitrate analyses on surfacewaters. For this reason, Nitrate-N data prior to 1983 should be used with caution. During 1997, a new sample type of bottle was used for dissolved nutrients, including Nitrate. These bottles were rinsed with HNO3. Due to the material of the sample bottles, the normal rinsing of the bottles was insufficient to remove all traces of Nitrate from the bottle. The spike in Nitrate results during 1997 can be attributed to this insufficient rinse. Beginning in 1998 the dissolved nutrient sample bottles were rinsed with HCI. Beginning in June 2000, Chloride, Nitrite-N, Nitrate-N, ortho-Phosphate-P and Sulfate were analyzed using ion chromatography. Starting in 2000, most surface water sites were sampled March-November, only. This may bias the annual averages to a higher value due to a higher percentage of months with irrigation occurring. Starting in 2001, monitoring was performed in irrigation ditches crossing the California / Nevada border. This was initiated following a request by the Nevada Department of Environmental Protection. Starting in 2002, a lower dilution was incorporated into the Total and Fecal Coliform test. This lowered the detection limit to 3 MPN/100mL. In 2015 The Regional Board replaced Total Coliform monitoring by the multiple tube fermentation method with E. coli monitoring using the Idexx Colilert Quanti-Tray method (chromogenic substrate). The detection limit for this test is 1 MPN/100mL. Soils In 2015 the Regional Board removed S8 from the list of soil sites to monitor. Sample Sites Site Latitude Longitude Location Type Sample Alpine County Monitoring Wells ACMW-01AW 38.766952 -119.781561 Below Main Dam Monitoring Well ACMW-01BE 38.766333 -119.785321 Below Secondary Dam Monitoring Well ACMW-02N 38.772392 -119.776819 Access gate Monitoring Well ACMW-02S 38.772341 -119.776816 Access gate Monitoring Well ACMW-03W 38.815138 -119.778848 Fredericksburg D @Hwy 88 Monitoring Well ACMW-04W 38.836719 -119.779439 Gansberg Ranch Monitoring Well ACMW-06N 38.800522 -119.763225 Celio Ranch,along DV Rd Monitoring Well ACMW-06S 38.800481 -119.763195 Celio Ranch,along DV Rd Monitoring Well ACMW-07S 38.771882 -119.801658 Diamond Valley Ranch Monitoring Well ACMW-07D 38.771882 -119.801658 Diamond Valley Ranch Monitoring Well ACMW-08N 38.773618 -119.776847 Diamond Valley Ranch Monitoring Well ACMW-08S 38.773618 -119.776847 Diamond Valley Ranch Monitoring Well ACMW-09D 38.780489 -119.790314 Diamond Valley Ranch Monitoring Well ACMW-09S 38.780489 -119.790314 Diamond Valley Ranch Monitoring Well ACMW-10 38.773336 -119.794246 Diamond Valley Weather Station Monitoring Well ACMW-11 38.775595 -119.788216 Diamond Valley Ranch Monitoring Well ACMW-12 38.777644 -119.795388 Diamond Valley Ranch Monitoring Well ACMW-13 38.768977 119.797083 Diamond Valley Ranch Monitoring Well ACMW-14 38.767441 119.793215 Diamond Valley Ranch Monitoring Well ACMW-15 38.769600 119.784280 Diamond Valley Ranch Monitoring Well ACMW-16 38.773829 119.784173 Diamond Valley Ranch Monitoring Well ACMW-17 38.776273 119.790107 Diamond Valley Ranch Monitoring Well ACMW-18 38.779213 119.782997 Diamond Valley Ranch Monitoring Well ACMW-19 38.776249 119.762112 Diamond Valley Ranch Monitoring Well ACMW-20 38.808781 119.777665 Near SW-05 Monitoring Well ACMW-21 38.819915 119.777072 Emigrant Trail near Chambers Lane Monitoring Well ACMW-22 38.829022 119.783738 Fredericksburg Lane near S7 Monitoring Well ACMW-23 38.825384 119.760193 On road to SW-15,upstream(S) Monitoring Well ACMW-24 38.832193 119.757427 On road,downstream (N) of SW-15 Monitoring Well ACMW-25 38.830470 119.769901 Road between Brooke's&Neddenriep @ Neddenripp's Monitoring Well ACMW-26 38.840602 119.769677 Road between Brooke's&Neddenriep @ Stateline Monitoring Well Alpine County Domestic Well GW-01 38.761146 -119.810926 Cohen House Domestic Well GW-02 38.772195 -119.801259 DV Ranch Domestic well Domestic Well GW-03 38.789132 -119.752446 Springmeyer Ranch house Domestic Well GW-04 38.800343 -119.762579 Cello Ranch house Domestic Well GW-05 38.830897 -119.773807 Neddenriep Ranch house Domestic Well GW-07 38.838895 -119.794154 Gansberg,Jr,Ranch house Domestic Well GW-08 38.815528 -119.781095 Arant Ranch house Domestic Well GW-11 38.766522 -119.808540 Diamond Valley School Domestic Well GW-14 38.757140 -119.818462 Sierra Pines Store Domestic Well GW-17 DV Ranch Domestic well Domestic Well C:\Users\dan\NppData\Local\Microsoft\Windows\Temporary Internet Files\Content.Outlook\BD22CZNG\Lahontan Report-Sample Sites Page 1 of 2 Sample Sites Site Latitude Longitude Location Type Sample Alpine County Surfacewater Sites SW-01 38.768903 -119.838353 Carson River,W Fork,Crystal Springs Rd Surfacewater SW-02 38.756651 -119.806706 Indian Creek @ Diversion Surfacewater SW-03 38.773149 -119.772618 Indian Creek downstream of 1st bridge Surfacewater SW-04 38.776730 -119.760423 Indian Creek upstream of 2nd bridge Surfacewater SW-05 38.809525 -119.777030 Carson River,W Fork,Paynesville Surfacewater SW-06 38.840850 -119.764100 Carson River,W Fork,Stateline Surfacewater SW-07 38.854967 -119.786541 Fredericksburg Ditch Surfacewater SW-08 38.786579 -119.799800 Irrigation Ditch along Carson River Road Surfacewater SW-09 38.867242 -119.760810 Carson River,W Fork,Dressler Lane Surfacewater SW-10 38.788719 -119.750599 Indian Creek @ Springmeyer Ranch Surfacewater Alpine County Soils Sites S-2 38.800316 -119.764305 Celio Ranch Soil S-3 38.801156 -119.780333 Bentley Ranch Soil S-4 38.842761 -119.780047 Gansberg Ranch Soil S-5 38.836900 -119.780200 Gansberg Ranch Soil S-6 38.829075 -119.780010 Neddenriep Ranch Soil S-7 38.829190 -119.785420 Bruns Ranch Soil S-8 38.817425 -119.757000 On-Farm Soil Heavenly Valley Creek HVC-1 38.917861 -119.959632 Heavenly Valley Creek;Downstream of Pioneer Surfacewater HVC-2 38.920120 -119.969390 Heavenly Valley Creek;250'upstream of Pond#2 Surfacewater HVC-3 38.921373 -119.971421 Heavenly Valley Creek;25'downstream of Meadow Crest Dr Surfacewater HVC-4 38.920591 -119.969271 Heavenly Valley Creek;Effluent of drain from Lower Shop area Surfacewater HVC-5 38.921278 -119.971090 Heavenly Valley Creek;Effluent of drainage pipe along Meadow Crest Dr Surfacewater Tahoe Basin Monitoring Wells Control 38.9135951 -119.9623870 North east of post office @ Black Bart and Pioneer Trail Monitoring Well MW01-50 38.9131807 -119.9640739 SE corner of Emergency Retention Basin,At access gate to ERB Monitoring Well MW01.5 38.9129062 -119.9642166 SE corner of Emergency Retention Basin,At access gate to ERB Monitoring Well MW02-50 38.9128116 -119.9652141 South side of Emergency Retention Basin,on Black Bart Ave Monitoring Well MW03-50 38.9129187 -119.9657562 South side of Emergency Retention Basin,on Black Bart Ave Monitoring Well MW03.5 38.9140351 -119.9664341 W side of Emergency Retention Basin,off Hank Monk Ave Monitoring Well MW04-50 38.9148881 -119.9666463 W side of Emergency Retention Basin,off Hank Monk Ave Monitoring Well MW05-50 38.9157076 -119.9663302 NW corner of Emergency Retention Basin,off Hank Monk Ave Monitoring Well MW06/50 38.9157148 -119.9648075 North side of Emergency Retention Basin Monitoring Well MW07-50 38.9157020 -119.9639551 NE corner of Emergency Retention Basin Monitoring Well MW08-25 38.9213967 -119.9709800 SW corner of Pond#1,at south access gate to STPUD Monitoring Well MW 11 38.9238680 -119.9677190 250 ft south east of North Gate(to Al Tahoe Blvd) Monitoring Well MW 12 38.9226200 -119.9683700 110 ft south of Biosolids Building Monitoring Well MW 13 38.9206200 -119.9692200 125 ft south east of Pond#2 Monitoring Well Ditch Sites DD-01 38.765624 -119.780543 Diamond Ditch @ beginning;HPR effluent Ditch SW-12 38.809127 -119.777411 Bruns Diversion Ditch SW-13 38.810082 -119.776900 Fredericksburg Ditch Ditch SW-14 38.866992 -119.794173 Fredericksburg Ditch Ditch SW-15 38.828440 -119.756263 Celio Tail water Ditch SW-16 38.866896 -119.783627 Drain Ditch @ Fairview Ln Ditch Reservoirs HPR 38.764500 -119.780450 Harvey Place Reservoir Reservoir C:\Users\dan\NppData\Local\Microsoft\Windows\Temporary Internet Files\Content.Outlook\BD22CZNG\Lahontan Report-Sample Sites Page 2 of 2 36 I o _ w SW-O]Sw 6 \ cv' 111 � i i 1 sego I x 3 � /� �° \" 'P- �` II Q I,I __rA'vi I � CMW-26 i i �� W-0 j. o _ CMW-04W 5039 CMW-26i CMW-22 <J L �a Fre _ - z ° # Ca c ° d r —P- CMW z3ti Gravel T � it CD CL s \� —1 i 13 8M 5069 apo Iy n of I 6 mot - 6 3 , 0 VV-12 z. Paynesvi4e f h 5°24 �. o �9 8 � va�aer l q iI 1 p0 __ Sewage — /� 41 i no BM 5264'� ° n I i i _ SW 10 011d pItCh ,�g SW-08 —; /l/t ' Sw 1X 30 Lyl j / \/\ 00 J v e r`,��IC� //.;/ SprCru�s. yr -1 - I -_ --+ //GS�1•.O: I � E.. n - ------ 4_ O CMW-09N 6e BM, —_ — ._—+__—.—_ 1, �y iCMW-09S MW-18 o 'J 5600 ll o SW-04 CMW-12 Woo ��, SO � .�L ACM 7 A SW ids NO -� CMW-11 J e Ce n it ACM CMW-0 -OS CMW-10 MW SW WW Sym nqa.. — ,Aker MW-02K1 ACMW=07 XCMW-02S -- � ACMW-07D - oll ACM AGMMICh p1tChoGa n io AC 0 No M - n 4 (*`400 S MW-01AW C, 5 � L I N f I A N 1 1 1NDI N �R EXPLANATION �w-o2 � I g " - U i /11 � flM /ati6 SW _�.A T 110 N SW ,.( 5846� 1 N O Surface Water CR-1 �r� o Ditch ICR 1. Q $fli'gtQ za �- - ICR-3 tj Reservoir ,,,� 6 do I �l MONITOR WELL ICR-5 ' tj Irrigation - Recyled-23 Water Irrigation - Blended Recycled Water f " SOUTH TAHOE PUBLIC UTILITY DISTRICT 0 1,500 3,000 6,000 Feet RECYCLED WATER PROGRAM w E MONITORING LOCATIONS SOVTN iAN06 ALPINE COUNTY, CA � s Path:X:\GIS\IB_Alpine County\Alpine Co Monitoring_11 x17_15 Aug 2014.mxd ALPINE COUNTY SOILS w - �` South Tahoe Public Utility District Alpine County Soil Sample Sites � i � 2 � ~ ) . + % S- S- � % � I \ � 5 � # � ■ / CL 0 Awn \. S- - 0 S � O 0.25 0.5 1 f Miles g~ _ Site S2a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Celio Type: KT 2021 Inches: 06-12 EC TKN NO, P P2O5 K K2O Cu Mo SOQ CEC Ca Na Mg Exch CI Exch P Date pH mS/cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg.Kg me/1009 mg/L mg/L mg/L SAR Na% mg/L mg/L 01/19/21 7.99 7.21 72.1 1460 5.32 919 2,100 1490 1,800 21.1 0.49 180 39.7 406 1200 284 11.2 13 2480 15.3 04/15/21 8.04 7.32 75.2 2810 1.90 1000 2,290 1780 2,140 10.7 0.79 270 32.7 190 934 272 10.2 11.9 2680 5.08 08/12/21 8.02 8.12 58.2 2210 7.40 1230 2,810 1890 2,280 4.8 0.44 145 32.2 203 1480 312 15.21 17.16 2420 15.7 11/08/21 8.11 8.30 64.4 2450 5.06 941 2,150 1900 2,290 4.4 0.71 180 22.6 224 1480 302 15.16 17.11 2780 14 Maximum 8.11 8.3 75.2 2810 7.40 1,230 2,810 1,900 2,290 21.1 0.79 270 39.7 406 1480 312 15.2 17.2 2,780 15.7 Minimum 7.99 7.21 58.2 1460 1.90 919 2,100 1,490 1,800 4.4 0.44 145 22.6 190 934 272.0 10.20 11.90 2,420 5.1 Average 8.04 7.74 67.5 2233 4.92 1,023 2,338 1,765 2,128 10.3 0.61 194 31.8 256 1274 293 12.94 14.79 2,590 12.5 #Tests 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Site S2a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Celio Type: KT From: 1981 Inches: 06-12 To: 2021 EC TKN NO3 P P2O5 K K2O Cu Mo SOq CEC Ca Na Mg Exch CI Exch P Year pH mS/cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg meiioog mg/L mg/L mg/L SAR Na% mg/L mg/L 1981 7.02 1.78 68.3 2,575 3.3 324 742 17,357 20,828 19 0.6 30 36 1982 6.95 1.38 66.9 3,487 3.7 666 1,525 15,155 18,186 18 0.4 37 28 1983 7.50 1.02 65.7 3,127 1.5 947 2,169 16,286 19,543 23 0.6 36 34 100 224 502 1984 7.97 1.59 62.7 2,585 1.7 664 1,521 14,255 17,106 17 0.3 13 29 92 126 53 2.52 2.4 350 1985 7.94 2.60 56.8 2,559 1.1 801 1,834 16,667 20,000 17 0.3 40 32 150 215 94 3.47 3.7 628 6.0 1986 7.86 3.00 63.7 2,827 1.0 818 1,873 13,183 15,820 17 0.3 104 33 157 276 103 4.10 4.5 658 6.9 1987 7.84 3.62 55.2 2,470 0.7 774 1,772 15,909 19,091 20 0.2 55 32 229 315 120 4.04 4.5 910 5.6 1988 7.76 5.90 63.0 2,938 1.0 815 1,866 13,183 15,820 19 0.2 132 32 323 597 218 6.20 7.3 1,625 7.6 1989 7.81 5.89 56.3 2,551 1.2 722 1,653 14,273 17,127 17 0.1 122 30 367 575 190 6.04 7.1 1,452 5.7 1990 7.87 5.81 58.3 2,491 1.2 696 1,594 13,875 16,650 13 0.1 109 31 328 566 190 6.08 7.1 1,513 5.1 1991 7.82 5.24 59.8 2,592 1.6 826 1,891 13,417 16,100 12 0.2 106 33 286 553 213 5.72 6.8 569 7.2 1992 7.86 5.33 58.5 2,376 1.8 832 1,905 13,583 16,300 10 0.1 120 25 253 652 152 7.91 9.3 1,440 6.3 1993 7.96 5.60 57.3 2,440 1.6 788 1,805 13,250 15,900 7 0.2 175 28 238 691 171 8.42 10.0 922 10.7 1994 7.96 5.12 61.2 2,365 1.7 888 2,034 14,500 17,400 8 0.1 130 33 210 628 171 7.45 8.7 1,382 5.5 1995 8.00 3.23 53.3 2,217 3.4 851 1,948 13,771 16,444 14 0.7 48 36 164 356 100 5.41 6.3 740 5.4 1996 8.06 2.60 56.9 2,097 3.0 852 1,951 8 1.0 38 33 121 303 67 5.42 6.3 415 6.5 1997 8.19 1.85 69.2 2,346 2.4 833 1,908 8 1.0 83 34 69 246 43 5.61 6.5 399 4.3 1998 8.15 1.29 66.2 2,316 3.3 760 1,740 16 < 1.1 51 29 57 159 31 4.19 4.6 5.9 1999 8.11 1.38 63.5 2,433 8.0 903 2,067 17 1.5 41 33 60 168 28 4.47 4.9 5.0 2000 8.24 1.98 70.6 2,355 2.5 873 2,000 11,823 14,200 22 < 1.0 58 30 67 249 45 5.57 6.3 6.8 2001 8.24 2.13 64.1 2,200 3.0 758 1,735 11,550 13,875 29 1.8 48 32 69 315 55 6.90 8.0 455 5.8 2002 8.23 1.76 68.7 2,920 6.2 860 1,967 11,300 13,550 20 2.0 60 31 60 241 39 6.13 7.0 299 6.5 2003 8.25 0.93 61.9 1,965 4.1 883 2,020 13,250 15,875 22 1.0 33 31 53 121 26 3.37 3.5 177 7.3 2004 8.27 1.14 64.4 2,500 25.0 925 2,120 12,425 14,900 20 < 1.0 24 32 51 120 34 3.24 3.3 198 8.3 2005 8.03 1.50 60.7 1,745 2.1 948 2,170 13,050 15,675 23 < 1.0 16 32 69 151 45 3.46 3.6 302 9.1 2006 7.97 2.63 73.7 2,748 2.4 942 2,158 10,655 12,775 25 0.8 111 33 91 240 107 3.96 4.3 212 12.1 2007 8.06 1.41 67.5 3,035 1.8 929 2,128 6,948 8,325 21 0.1 35 67 157 51 3.52 3.7 263 10.7 2008 7.95 1.78 54.0 2,611 2.8 793 1,815 2,003 2,400 15 0.1 32 77 218 51 4.65 5.2 249 17.7 2009 8.16 3.32 68.9 3,185 4.3 778 1,780 2,735 3,250 9 0.1 65 30 80 477 88 8.57 9.9 879 11.0 2010 8.11 1.50 65.5 2,928 2.9 765 1,750 2,341 2,775 16 0.1 47 34 70 173 44 3.94 4.2 179 8.1 2011 8.10 1.93 65.2 2,838 3.0 702 1,610 2,800 3,400 17 0.1 102 34 68 300 57 6.51 7.5 311 10.1 2012 7.75 2.22 62.6 3,133 5.2 716 1,638 2,186 2,600 14 0.1 115 34 92 276 50 5.90 6.8 383 15.1 2013 7.87 3.59 68.1 3,098 5.1 699 1,600 2,830 3,400 14 0.2 115 30 178 377 109 5.48 6.2 1,046 9.8 2014 7.95 5.69 67.3 3,260 4.4 635 1,455 2,593 3,100 15 0.2 146 34 246 627 186 7.38 8.6 786 5.9 2015 7.86 8.41 68.7 5,008 7.3 603 1,383 2,515 3,025 15 0.1 264 34 231 1344 414 12.00 13.7 2,329 8.5 2016 8.00 7.09 76.7 5,433 11.3 504 1,153 3,613 4,325 11 0.2 265 38 244 817 294 10.39 11.9 1,925 17.2 2017 7.92 6.87 69.8 4,068 6.7 455 1,043 1,969 2,375 9 0.1 331 31 283 705 277 7.13 8.3 1,847 10.2 2018 8.03 6.08 65.3 3,448 5.0 607 1,391 3,011 3,627 16 0.1 121 31 203 419 188 4.82 5.3 1,659 7.5 2019 8.10 6.64 64.9 3,960 5.8 632 1,440 2,590 3,120 24 0.1 160 28 179 655 205 8.50 9.76 2,200 17.4 2020 8.10 4.13 75.3 3,313 11.8 925 2,118 2,585 3,115 19 0.3 94 29 184 588 160 7.68 8.80 1,623 10.7 2021 8.04 7.74 67.5 2,233 4.9 1,023 2,338 1,765 2,128 10 0.6 194 32 256 1274 293 12.94 14.79 2,590 12.5 Maximum 8.27 8.41 76.7 5,433 25.0 1,023 2,338 17,357 20,828 29 2.0 331.25 38 367 1344 414 12.94 14.8 2,590 17.7 Minimum 6.95 0.93 53.3 1,745 0.7 324 742 1,765 2,128 7 0.1 13 25 51 120 26 2.52 2.4 177 4.3 Average 7.95 3.53 64.2 2,848 4.2 773 1,771 9,330 11,193 16 0.5 98 32 157 423 125 6.03 6.9 928 8.7 #Tests 41 41 41 41 41 41 41 37 37 41 41 39 41 39 39 38 38 38 36 37 Site: S2a Ranch : Celio pH Salinity 10 10 9 9 8 8 7 6 a 7 U) 5 E 4 6 3 5 2 1 4 9s;298992928;28FZ:vF v9?a O pH Linear(pH) Salinity Linear(Salinity) Cation Exchange Capacity Sodium Adsorption Ratio 50 15 40 at 30 10 0 o r a 20 N 5 10 0 ��mm�mm��m��m��mm��r�0000r�RRrRRrRRrrR� O CEC Linear(CEC) --4--SAR Linear(SAR) Site S3a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Hall Type: SMB 2021 Inches: 06-12 EC TKN NO, P P2O1 K K2O Cu Mo SO4 CEC Ca Na Mg Exch CI Exch P Date pH mS/cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg.Kg me/loog mg/L mg/L mg/L SAR Na% mg/L E! 01/19/21 6.13 0.37 38.8 1310 0.444 811 1,860 690 830 8.4 0.76 13 21.4 35.7 26.1 6.23 1.06 < 1 475 9.95 04/15/21 5.96 0.423 32.7 924 0.768 875 2,002 894 1,080 12.3 0.51 22 19.7 32.4 44.9 10.5 1.75 1.26 250 8.97 08/12/21 5.36 0.498 35.7 1510 0.66 1160 2,650 762 920 2.9 0.3 12 20 62.5 51.1 13.4 1.53 < 1 325 8.95 11/08/21 6.47 0.507 32 901 0.42 816 1,870 814 980 2 0.67 11 19.7 78.4 46.7 12.9 1.29 < 1 375 8.69 Maximum 6.47 0.507 38.8 1,510 0.77 1,160 2,650 894 1,080 12.3 0.76 22 21.4 78.4 51.1 13.4 1.75 1.26 475 10.0 Minimum 5.36 0.370 32.0 901 0.420 811 1,860 690 830 2.0 0.30 11 19.7 32.4 26.1 6.23 1.06 < 1.00 250 8.69 Average 5.98 0.450 34.8 1,161 0.57 916 2,096 790 953 6.4 0.56 15 20.2 52.3 42.2 10.8 1.41 1.07 356 9.14 #Tests 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Site S3a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Hall Type: SMB From: 1981 Inches: 06-12 To: 2021 EC TKN NO3 P P2O5 K K2O Cu Mo SOa CEC Ca Na Mg Exch CI Exch P Year pH mS/cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg me/100g mg/L mg/L mg/L SAR Na% mg/L mg/L 1981 5.68 1.44 31.4 1,411 0.6 420 962 5,716 6,859 40 0.7 24 23 1982 5.81 0.96 31.3 1,225 3.0 720 1,649 15,887 19,064 37 0.5 33 19 1983 5.93 0.66 44.4 1,928 0.5 790 1,809 14,210 17,052 29 0.5 59 20 61 1984 5.69 0.58 37.9 1,378 0.7 732 1,676 16,818 20,182 20 0.4 32 15 42 34 3 1.21 0.5 54 1985 5.86 0.80 36.2 1,479 0.6 774 1,772 19,036 22,843 18 0.6 26 18 60 54 20 1.59 1.0 103 10.5 1986 5.64 0.73 41.3 1,685 0.7 705 1,614 17,510 21,012 19 0.4 25 19 51 54 17 1.66 1.5 111 12.7 1987 5.30 0.67 35.7 1,435 0.4 768 1,759 18,182 21,818 19 0.5 27 17 52 56 17 1.65 1.5 103 12.2 1988 5.67 1.51 43.2 1,898 0.5 761 1,743 17,600 21,120 21 0.5 49 18 123 139 32 2.96 3.0 265 15.1 1989 5.51 1.73 38.6 1,605 0.5 695 1,591 18,000 21,600 19 0.3 57 17 112 165 40 3.46 3.7 322 9.1 1990 5.84 1.73 35.7 1,613 0.7 720 1,650 16,500 19,800 13 0.3 41 18 99 172 35 4.00 4.4 331 9.0 1991 5.85 2.08 36.5 1,551 0.6 789 1,807 18,167 21,800 13 0.5 46 21 141 182 54 3.39 3.6 428 10.9 1992 6.11 3.47 36.3 1,411 0.9 803 1,838 17,333 20,800 12 0.3 44 20 255 264 100 3.70 4.0 388 16.8 1993 5.90 1.61 37.2 1,712 0.8 716 1,640 16,818 20,182 8 0.3 33 18 105 121 40 2.59 2.6 280 12.6 1994 5.92 1.65 36.1 1,153 1.1 798 1,826 18,167 21,800 9 0.2 33 19 128 168 84 2.72 2.8 521 13.2 1995 6.10 1.20 33.7 1,439 4.5 782 1,790 16,694 19,889 14 0.7 26 21 80 100 31 2.54 2.5 168 7.6 1996 6.37 0.76 35.8 1,427 2.9 826 1,892 9 1.0 17 20 47 74 17 2.40 2.2 124 9.2 1997 5.97 0.56 35.7 1,188 1.4 738 1,688 10 1.0 15 17 33 49 12 1.96 1.8 68 15.4 1998 6.10 0.45 35.9 1,292 1.6 1,010 2,310 18 < 1.2 13 17 32 34 11 1.45 1.3 15.3 1999 5.99 0.36 36.4 1,403 2.8 1,078 2,470 24 < 1.0 6 18 23 28 6 1.45 1.3 17.5 2000 6.33 0.45 36.2 1,278 1.3 1,085 2,485 16,675 20,000 31 1.3 8 18 26 46 9 2.00 1.6 16.5 2001 6.19 0.30 35.2 1,167 1.2 860 1,970 16,600 19,925 33 2.8 4 18 27 33 9 1.43 < 1.0 25 16.3 2002 6.07 0.44 33.8 1,362 3.6 925 2,115 16,450 19,775 30 2.3 9 18 29 30 10 1.23 < 1.0 52 18.7 2003 6.46 0.26 35.7 1,400 1.2 1,023 2,343 16,667 20,000 59 1.0 6 20 22 23 5 1.14 1.0 16 11.4 2004 6.17 0.37 33.1 1,200 1.7 1,040 2,380 17,275 20,725 31 1.3 9 20 24 30 8 1.38 1.0 31 15.1 2005 5.69 0.34 36.5 1,300 1.0 1,095 2,508 15,850 19,025 30 1.3 16 20 26 24 8 1.03 < 1.0 23 21.4 2006 5.75 0.33 33.7 886 2.2 1,008 2,307 12,893 15,467 35 0.7 16 18 27 21 8 0.88 < 1.0 25 13.2 2007 5.58 0.38 41.0 1,898 2.1 930 2,130 5,854 7,025 25 0.1 22 26 33 8 1.45 < 1.1 35 14.5 2008 5.62 0.29 34.9 1,322 1.5 730 1,673 1,174 1,400 17 0.1 18 22 21 7 1.01 < 1.0 23 12.5 2009 5.90 0.22 33.1 1,016 1.5 766 1,753 1,504 1,800 11 0.1 10 18 14 17 5 0.71 < 1.0 16 6.3 2010 5.67 0.26 40.9 1,701 2.2 704 1,613 1,438 1,700 17 0.1 26 21 16 20 6 1.06 < 1.0 27 8.5 2011 5.57 0.29 38.5 1,730 1.3 741 1,695 1,782 2,150 17 0.1 35 20 20 18 8 0.90 < 1.0 30 40.4 2012 6.10 0.33 34.4 1,557 0.8 654 1,500 1,040 1,267 15 0.2 42 19 43 14 8 0.65 < 1.0 15 10.3 2013 5.74 0.26 34.1 1,132 0.4 607 1,390 1,353 1,625 16 0.1 22 18 22 19 5 0.92 < 1.0 16 5.7 2014 5.97 0.38 32.4 997 0.5 691 1,585 1,508 1,825 16 0.2 21 17 23 36 7 1.73 < 1.4 17 5.6 2015 5.90 0.44 34.5 1,691 0.7 562 1,285 1,698 2,050 15 0.1 19 18 21 36 15 1.48 < 1.1 32 27.6 2016 5.69 0.31 34.1 1,878 3.5 556 1,275 1,812 2,175 15 0.2 10 18 15 33 4 1.96 1.7 28 32.2 2017 5.79 0.35 35.0 1,935 6.0 357 815 1,255 1,525 8 0.1 23 18 24 21 5 1.06 1.0 14 36.8 2018 5.89 0.46 38.1 2,073 1.7 537 1,230 1,800 2,168 13 0.1 59 21 24 43 12 1.95 1.7 157 9.0 2019 5.94 0.44 35.6 1,960 2.66 504 1,150 1,480 1,780 18.3 0.1 31 20.1 39.6 33.8 10.1 1.28 1.1 294 8.29 2020 5.88 0.42 37.3 1,503 1.94 799 1,826 1,318 1,588 15.6 0.2 14 18.4 22.6 38.2 8.3 1.74 1.3 413 8.84 2021 5.98 0.45 34.8 1,161 0.57 916 2,096 790 953 6.4 0.6 15 20.2 52.3 42.2 10.8 1.41 1.1 356 9.14 Maximum 6.46 3.47 44.4 2,073 6.0 1,095 2,508 19,036 22,843 59 2.8 59 23 255 264 100 4.00 4.4 521 40.4 Minimum 5.30 0.22 31.3 886 0.4 357 815 790 953 6 0.1 4 15 14 14 3 0.65 0.5 14 5.6 Average 5.88 0.75 36.1 1,473 1.6 773 1,771 10,401 12,480 20 0.6 26 19 51 61 18 1.77 1.7 140 14.5 #Tests 41 41 41 41 41 41 41 37 37 41 41 39 41 39 38 38 38 38 35 37 Site: S3a Ranch : Hall pH Salinity 10 5 9 4 8 E 3 C. 7 fA � 2 6 5 1 t pH Linear(pH) Salinity Linear(Salinity) Cation Exchange Capacity Sodium Adsorption Ratio 50 15 40 10 0 30 a y E 20 5 10 0 0 t CEC Linear(CEC) t SAR Linear(SAR) Site S4a S4a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Gansber Gansberg Type: DI DI 2021 Inches: 06-12 06-12 EC TKN NO, P P2O1 K KZO Cu Mo SOa CEC Ca Na Mg Exch CI Exch P Date pH mS/cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg.Kg me/100g mg/L mg/L mg/L SAR Na% mg/L mg/L 01/19/21 7.28 1.41 39.1 2140 7.66 374 860 8160 9,830 15.4 0.45 19 19.5 125 29.9 19.3 0.66 < 1 600 42.7 04/15/21 6.29 1.24 41.5 2490 12.2 561 1,280 8690 10,470 11.2 0.77 27 23.5 88 83.3 19.9 2.09 1.73 375 152 08/26/21 7.25 2.02 38.9 2420 3.5 1100 2,520 3870 4,660 5.6 0.37 2 20.4 46.9 32.4 7.39 1.16 < 1 300 30.2 11/08/21 6.26 0.754 56.8 6690 5.37 993 2,270 3960 4,770 4.4 0.83 15 29.1 56 44.2 6.91 1.48 < 1 350 52.8 Maximum 7.28 2.020 56.8 6,690 12.20 1,100 2,520 8,690 10,470 15.4 0.83 27 29.1 125.0 83.3 19.9 2.09 1.73 600 152.0 Minimum 6.26 0.754 38.9 2,140 3.50 374 860 3,870 4,660 4.4 0.37 2 19.5 46.9 29.9 6.91 0.66 < 1.00 300 30.20 Average 6.77 1.356 44.1 3435 7.183 757 1,733 6,170 7,433 9.2 0.61 16 23.1 79.0 47.5 13.38 1.35 1.18 406 69.4 #Tests 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Site S4a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Gansberg Type: DI From: 1981 Inches: 06-12 To: 2021 EC TKN NO3 P P2O5 K K2O Cu Mo SOa CEC Ca Na Mg Exch Cl Exch P Year pH mS/cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg me/100g mg/L mg/L mg/L SAR Na% mg/L mg/L 1981 5.80 0.92 47.0 1,533 1.2 206 472 20,757 24,908 28 1.4 17 14 1982 5.92 0.76 45.3 1,938 5.6 473 1,083 20,766 24,919 25 0.8 24 14 1983 6.37 0.36 44.3 1,907 1.5 440 1,008 19,075 22,890 28 0.5 22 16 39 51 89 1984 6.19 0.39 37.6 1,392 1.3 349 799 23,191 27,829 29 0.4 10 17 34 23 8 1.02 0.4 36 1985 6.18 0.41 37.7 1,710 0.8 455 1,042 23,075 27,690 27 0.3 9 19 33 34 7 1.39 0.8 52 6.4 1986 6.08 0.52 39.4 1,625 1.0 436 998 20,800 24,960 26 0.3 11 18 55 52 9 1.98 1.9 125 6.5 1987 6.23 1.00 38.4 1,837 0.6 354 811 24,455 29,346 29 0.3 14 17 91 68 20 1.78 1.5 262 10.6 1988 6.18 1.44 41.9 2,051 0.5 399 914 22,500 27,000 30 0.4 20 18 115 104 25 2.35 2.2 317 9.9 1989 6.35 3.26 39.2 1,920 0.7 311 712 23,455 28,145 28 0.2 34 17 219 205 48 3.22 3.3 699 11.1 1990 6.69 1.29 37.5 1,742 1.2 392 899 19,125 22,950 21 0.2 20 17 99 107 23 2.48 2.5 389 14.6 1991 6.57 0.97 38.1 1,860 2.4 381 872 21,667 26,000 20 0.3 12 20 65 82 15 2.38 2.2 171 11.4 1992 6.55 0.98 37.8 1,765 1.5 419 960 21,917 26,300 20 0.3 12 19 72 78 15 2.10 1.8 183 12.3 1993 6.47 0.68 35.8 1,670 2.9 392 897 23,417 28,100 14 0.2 9 19 48 49 15 1.69 1.4 66 9.9 1994 6.53 0.67 35.8 1,381 2.4 423 969 22,500 27,000 14 0.1 10 18 46 65 10 2.25 2.0 214 9.7 1995 6.44 1.15 33.5 1,330 8.0 445 1,020 22,194 26,667 21 0.5 9 13 74 72 17 1.94 1.8 148 6.4 1996 6.82 1.13 36.6 1,594 7.4 470 1,078 14 1.0 11 18 75 91 17 2.39 2.4 82 14.6 1997 6.51 0.51 37.1 1,434 5.1 398 913 16 1.0 4 17 36 47 8 1.84 1.7 40 11.0 1998 6.58 0.81 35.7 1,235 5.0 620 1,420 28 1.2 6 17 45 72 10 2.61 2.4 12.0 1999 6.73 0.97 38.5 1,650 6.9 570 1,305 37 1.8 7 19 66 82 15 2.47 2.3 13.4 2000 6.94 1.63 39.0 1,725 6.6 568 1,300 22,800 27,350 46 < 1.0 16 19 77 136 21 3.55 3.7 19.0 2001 6.83 1.11 37.3 1,585 5.3 515 1,177 22,700 27,225 53 2.0 8 21 86 102 20 2.69 2.7 152 16.7 2002 6.49 0.46 37.3 1,753 3.8 555 1,272 17,300 20,750 40 1.8 3 19 38 47 9 1.85 1.7 52 19.4 2003 6.82 0.55 36.6 1,515 3.2 538 1,230 22,125 26,575 69 1.5 4 19 34 69 7 2.78 2004 6.33 1.09 33.6 1,428 3.8 595 1,363 23,775 28,525 44 1.0 7 19 24 65 16 2.58 2.4 80 11.8 2005 6.49 0.54 36.8 1,550 3.2 643 1,473 22,050 26,450 42 1.0 7 21 32 54 6 2.30 2.1 61 10.3 2006 6.17 0.43 41.7 1,711 8.8 639 1,463 18,460 22,150 42 1.0 6 19 30 41 6 1.88 1.5 29 13.9 2007 6.23 0.46 42.0 2,195 1.2 482 1,105 9,518 11,400 31 0.1 22 35 56 7 2.29 2.0 50 9.4 2008 6.34 0.51 34.4 1,270 2.1 335 765 5,049 6,050 23 0.1 18 31 65 6 2.75 2.6 60 6.5 2009 6.54 0.65 38.3 2,058 6.2 457 1,048 6,487 7,800 15 0.1 10 20 30 85 8 3.54 3.7 69 13.3 2010 6.54 0.63 38.8 2,000 5.1 366 835 5,847 7,025 25 0.1 19 20 30 57 6 2.44 2.4 54 9.1 2011 6.44 0.55 38.6 1,800 6.8 507 1,160 6,973 8,333 27 0.1 55 20 31 70 7 2.94 2.9 35 5.8 2012 6.85 1.16 38.3 2,023 5.8 415 948 5,630 6,750 23 0.2 41 19 57 141 14 4.47 5.0 195 6.5 2013 6.54 0.68 40.4 1,920 7.4 278 638 6,827 8,175 23 0.2 22 16 43 80 8 2.91 2.9 46 6.4 2014 6.46 0.60 37.8 1,835 7.9 348 798 5,579 6,700 24 0.2 19 17 38 72 8 2.89 2.8 28 8.3 2015 6.14 0.94 40.8 2,793 9.8 352 805 5,266 6,325 25 0.1 23 20 42 80 17 2.60 2.4 84 13.7 2016 6.68 1.36 43.0 3,410 11.1 288 658 6,676 8,000 20 0.1 23 22 68 138 19 3.56 3.7 182 19.0 2017 6.93 0.67 39.6 2,270 11.2 272 620 4,176 5,000 15 0.1 24 20 47 67 10 2.38 2.2 23 11.4 2018 6.83 0.76 38.8 2,390 7.9 688 1,577 2,178 2,624 17 0.1 37 18 43 72 11 2.63 2.5 253 8.9 2019 6.37 0.51 41.5 2,570 6.8 795 1,820 2,810 3,390 20 0.05 26 20 34 36 8 1.49 1.3 350 22.7 2020 6.56 1.12 42.0 2,820 12.6 527 1,205 5,155 6,213 20 0.15 14 19 42 68 21 2.07 1.8 425 82.1 2021 6.77 1.36 44.1 3,435 7.2 757 1,733 6,170 7,433 9 0.61 16 23 79 47 13 1.35 1.2 406 69.4 Maximum 6.94 3.26 47.0 3,435 12.6 795 1,820 24,455 29,346 69 2.0 55 23 219 205 48 4.47 5.0 699 82.1 Minimum 5.80 0.36 33.5 1,235 0.5 206 472 2,178 2,624 9 0.0 3 13 24 23 6 1.02 0.4 23 5.8 Average 6.47 0.88 39.0 1,893 4.9 460 1,053 15,201 18,242 27 0.6 16 19 56 75 13 2.42 2.3 157 15.1 #Tests 41 41 41 41 41 41 41 37 37 41 41 39 41 39 39 38 38 37 35 36 Site: S4a Ranch : Gansberg pH Salinity 10 5 9 4 8 E 3 C. 7 fA � 2 6 5 1 t pH Linear(pH) Salinity Linear(Salinity) Cation Exchange Capacity Sodium Adsorption Ratio 50 15 40 10 0 30 a y E 20 5 10 0 0 t CEC Linear(CEC) t SAR Linear(SAR) Site S5a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Gansberg Type: HRB 2021 Inches: 06-12 EC TKN NO, P P2O1 K K2O Cu Mo SO4 CEC Ca Na Mg Exch CI Exch P Date pH mS/cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg.Kg me/loog mg/L mg/L mg/L SAR Na% mg/L E! 01/19/21 5.92 0.54 31.2 1010 5.98 312 714 3590 4,330 14.0 0.62 5 13.9 80.4 37.2 7.42 1.06 < 1 575 5.03 04/15/21 6.03 0.457 35.3 1220 9.68 437 1,000 3810 4,590 11.8 0.78 14 17.4 27.8 41.9 7.03 1.84 1.38 450 7.88 08/12/21 5.92 0.439 33.0 1590 5.23 989 2,263 3700 4,460 6.8 0.38 4 14.5 70.3 67.2 13.8 1.92 1.50 350 6.62 11/08/21 5.96 0.391 30.6 1300 5.06 600 1,370 3700 4,460 5.5 0.75 1 15.6 98.4 52.2 11.2 1.33 < 1 325 14 Maximum 6.03 0.540 35.3 1,590 9.68 989 2,263 3,810 4,590 14.0 0.78 14 17.4 98.4 67.2 13.80 1.92 1.50 575 14.00 Minimum 5.92 0.391 30.6 1,010 5.06 312 714 3,590 4,330 5.5 0.38 1 13.9 27.8 37.2 7.03 1.06 < 1.00 325 5.03 Average 5.96 0.457 32.5 1,280 6.49 585 1,337 3,700 4,460 9.5 0.63 6 15.4 69.2 49.6 9.86 1.54 1.22 425 8.38 #Tests 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Site S5a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Gansberg Type: HRB From: 1981 Inches: 06-12 To: 2021 EC TKN NO3 P P2O5 K K2O Cu Mo SOa CEC Ca Na Mg Exch Cl Exch P Year pH mS/cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg me/100g mg/L mg/L mg/L SAR Na% mg/L mg/L 1981 5.80 1.08 31.2 997 1.4 233 534 19,729 23,675 21 10.9 19 12 1982 6.05 0.60 29.5 1,011 2.4 455 1,042 20,944 25,133 21 0.7 17 10 1983 6.14 0.18 29.5 982 0.9 462 1,058 18,362 22,034 22 0.6 9 10 24 33 42 1984 6.12 0.23 29.6 1,019 0.8 462 1,058 21,827 26,192 26 0.7 5 11 18 20 3 1.15 0.5 27 1985 6.27 0.35 28.1 1,031 0.9 501 1,147 22,575 27,090 21 0.6 5 11 24 39 4 2.05 1.7 42 5.8 1986 6.12 0.33 29.5 1,048 0.6 440 1,008 21,100 25,320 20 0.5 7 11 27 33 3 1.68 1.6 35 6.2 1987 6.22 0.63 29.6 1,037 0.5 470 1,076 24,727 29,672 21 0.6 9 13 30 58 4 2.56 2.5 74 6.5 1988 6.16 0.65 29.4 1,137 0.8 475 1,088 21,667 26,000 24 0.6 13 12 31 93 5 4.34 4.9 74 7.6 1989 6.02 0.79 28.9 1,128 1.1 398 912 21,727 26,073 19 0.4 11 11 47 90 7 3.32 3.5 92 7.6 1990 6.26 0.56 28.0 1,140 1.2 467 1,068 21,500 25,800 14 0.4 8 10 27 77 4 3.71 4.0 74 6.7 1991 6.21 0.44 29.8 1,143 2.9 467 1,070 22,083 26,500 15 0.7 6 12 21 68 4 3.62 3.9 16 11.8 1992 6.32 0.41 29.1 1,220 3.6 556 1,273 20,917 25,100 16 0.7 5 14 19 57 4 3.17 3.4 17 9.6 1993 6.08 0.37 29.2 1,146 3.2 510 1,168 20,250 24,300 10 0.4 6 14 19 45 3 2.57 2.5 37 9.9 1994 6.08 0.42 28.8 917 4.9 570 1,305 23,083 27,700 8 0.3 5 12 25 47 4 2.31 2.1 41 7.8 1995 6.18 0.35 28.2 951 5.2 585 1,341 20,644 24,778 16 1.5 4 13 16 42 4 2.58 2.5 32 7.7 1996 6.20 0.35 29.7 996 6.2 572 1,310 8 1.0 1 13 26 37 4 1.90 1.7 21 4.5 1997 6.18 0.28 32.9 1,006 5.2 513 1,175 11 1.0 1 13 20 28 4 1.48 1.1 16 6.7 1998 6.23 0.51 32.9 1,158 9.7 850 1,950 20 1.3 4 11 42 34 8 1.37 1.1 15.2 1999 6.20 0.37 30.6 1,047 6.6 813 1,860 28 1.8 2 12 40 28 6 1.10 < 1.0 16.3 2000 6.12 0.28 31.8 1,135 6.0 810 1,855 18,825 22,575 33 1.0 3 15 19 28 4 1.54 1.1 10.5 2001 6.00 0.47 32.2 1,015 8.5 708 1,620 20,675 24,825 36 1.5 2 15 31 48 6 2.14 1.8 35 9.7 2002 6.26 0.29 30.7 1,114 5.0 705 1,615 19,775 23,750 31 2.3 2 15 16 38 3 2.37 2.2 20 9.6 2003 6.34 0.28 32.2 1,200 4.0 740 1,693 19,663 23,625 30 2.0 3 14 17 35 3 2.10 1.8 27 7.2 2004 6.14 0.27 32.0 1,163 3.8 930 2,130 20,850 25,025 37 1.5 5 17 12 37 2 2.51 2.3 19 7.6 2005 6.27 0.23 33.3 1,093 2.5 895 2,050 18,675 22,400 35 2.0 4 16 12 32 2 2.28 2.0 13 6.3 2006 6.16 0.24 35.1 1,095 3.1 818 1,875 16,070 19,300 37 1.0 8 14 16 29 3 1.79 1.3 10 8.6 2007 5.98 0.30 33.7 1,200 1.7 557 1,273 7,886 9,450 24 0.1 15 18 34 3 1.88 1.6 27 6.6 2008 6.06 0.38 31.9 1,052 6.1 434 993 2,975 3,550 18 0.1 14 22 51 3 2.72 2.6 25 7.3 2009 6.04 0.38 32.6 1,228 6.2 588 1,345 2,816 3,375 12 0.2 9 16 19 55 4 3.09 3.1 31 7.7 2010 6.09 0.36 33.3 1,400 6.5 500 1,145 2,953 3,525 19 0.1 16 15 23 46 5 2.33 2.1 19 5.0 2011 6.03 0.27 35.6 1,340 6.2 595 1,363 3,733 4,475 21 0.1 32 15 18 34 4 1.91 1.5 10 7.5 2012 6.01 0.34 35.6 1,618 5.9 446 1,020 2,615 3,175 17 0.1 29 15 23 38 5 1.94 1.6 21 6.5 2013 5.80 0.42 36.3 1,488 5.6 598 1,370 3,479 4,150 17 0.1 26 15 33 39 6 1.68 1.3 25 8.3 2014 5.98 0.33 34.1 1,260 5.5 489 1,120 2,887 3,475 20 0.3 15 14 20 42 4 2.25 2.0 9 7.4 2015 5.70 0.56 35.3 1,720 6.4 449 1,028 3,231 3,875 20 0.1 16 16 39 59 8 2.38 2.1 68 5.2 2016 6.04 0.40 37.0 1,880 8.9 439 1,005 3,704 4,450 17 0.2 10 17 21 47 5 2.51 2.3 31 10.1 2017 5.87 0.41 35.7 1,840 10.1 556 1,273 2,278 2,725 15 0.1 21 18 34 34 6 1.45 1.1 16 8.8 2018 5.89 0.53 34.4 1,913 9.1 370 848 3,110 3,746 16 0.1 30 16 38 46 10 1.81 1.6 176 6.4 2019 6.05 0.36 32.9 1,720 6.14 427 979 2,410 2,900 21 0.05 24 15 37 30 6 1.23 1.2 306 5.4 2020 5.98 0.29 38.2 1,828 3.76 680 1,558 2,865 3,453 17 0.55 3 14 29 35 5 1.56 1.1 456 6.9 2021 5.96 0.46 32.5 1,280 6.49 585 1,337 3,700 4,460 10 0.63 6 15 69 50 10 1.54 1.2 425 8.4 Maximum 6.34 1.08 38.2 1,913 10.1 930 2,130 24,727 29,672 37 10.9 32 18 69 93 10 4.34 4.9 456 16.3 Minimum 5.70 0.18 28.0 917 0.5 233 534 2,278 2,725 8 0.0 1 10 12 20 2 1.10 0.5 9 4.5 Average 6.09 0.41 32.0 1,236 4.5 564 1,291 13,684 16,423 21 0.9 10 14 26 44 5 2.21 2.0 67 8.0 #Tests 41 41 41 41 41 41 41 37 37 41 41 39 41 39 39 38 38 38 36 37 Site: S5a Ranch : Gansberg pH Salinity 10 5 9 4 8 8 3 a 7 N 8 2 6 5 Ak 2222922.29 t pH Linear(pH) Salinity Linear(Salinity) Cation Exchange Capacity Sodium Adsorption Ratio 50 15 40 10 0 30 a y E 20 5 10 0 0 t CEC Linear(CEC) t SAR Linear(SAR) Site S6a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Neddenriep Type: DWB 2021 Inches: 06-12 EC TKN NO, P P2O1 K K2O Cu Mo SO4 CEC Ca Na Mg Exch CI Exch P Date pH mS/cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg.Kg me/loog mg/L mg/L mg/L SAR Na% mg/L E! 01/19/21 7.10 0.588 44.1 2500 7.55 560 1,281 3220 3,880 11.2 0.30 11 19.1 44.6 46.7 9.59 1.65 1.12 450 18.1 04/15/21 7.11 0.339 46.5 2360 5.95 623 1,430 3600 4,340 10.7 0.88 5 19.0 46.3 36.0 5.52 1.33 < 1 300 16.5 08/12/21 7.38 0.658 42.3 2020 9.63 739 1,690 2810 3,390 3.9 0.35 6 18.8 54.7 18.5 9.26 0.61 < 1 450 8.90 11/08/21 7.38 1.01 40.9 2610 15.9 654 1,500 2900 3,490 2.7 0.78 14 18.5 56.0 16.0 8.41 0.53 < 1 350 12.1 Maximum 7.38 1.010 46.5 2,610 15.9 739 1,690 3,600 4,340 11.2 0.88 14 19.1 56.0 46.7 9.59 1.65 1.12 450 18.1 Minimum 7.10 0.339 40.9 2,020 5.950 560 1,281 2,810 3,390 2.7 0.30 5 18.5 44.6 16.0 5.52 0.53 < 1.00 300 8.90 Average 7.24 0.649 43.450 2373 9.8 644 1,475 3,133 3,775 7.1 0.58 9 18.9 50.4 29.3 8.20 1.03 1.03 388 13.9 #Tests 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Site S6a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Neddenriep Type: DWB From: 1981 Inches: 06-12 To: 2021 EC TKN NO3 P P2O5 K K2O Cu Mo SOa CEC Ca Na Mg Exch CI Exch P Year pH mS/cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg me/100g mg/L mg/L mg/L SAR Na% mg/L mg/L 1981 4.96 1.55 29.3 1,509 0.9 500 1,145 18,357 22,028 28 0.5 17 15 1982 5.60 1.27 56.3 2,145 3.2 672 1,539 17,111 20,533 30 0.2 42 15 1983 6.07 0.69 45.1 1,786 0.9 702 1,608 17,395 20,874 28 0.2 32 15 30 101 123 1984 5.94 0.30 43.6 1,797 0.7 701 1,605 19,055 22,866 28 0.4 15 17 10 43 2 3.30 3.5 35 1985 6.04 0.33 44.0 2,019 0.8 754 1,727 21,633 25,960 28 0.2 10 17 12 51 3 3.66 4.0 43 27.4 1986 6.08 0.31 42.7 1,780 1.2 611 1,399 18,908 22,690 28 0.3 10 15 16 43 2 3.27 3.6 38 33.8 1987 6.13 0.59 41.6 1,815 0.5 732 1,676 20,000 24,000 32 0.3 15 15 26 84 5 4.16 4.6 112 37.7 1988 6.18 1.22 41.3 1,787 0.6 748 1,713 19,000 22,800 29 0.3 24 16 48 173 13 6.16 7.2 256 28.8 1989 6.12 0.83 39.5 1,672 0.6 614 1,405 20,727 24,873 29 0.2 17 14 28 123 6 5.61 6.5 155 23.3 1990 6.27 0.49 38.8 1,622 0.9 664 1,521 16,625 19,950 23 0.2 12 14 28 95 5 4.73 5.4 69 26.6 1991 5.97 0.69 37.9 1,534 1.6 680 1,557 19,833 23,800 22 0.2 12 17 23 111 5 5.46 6.3 132 56.4 1992 6.25 0.80 36.9 1,443 1.4 663 1,519 19,833 23,800 22 0.2 26 15 26 113 6 5.62 6.6 348 29.3 1993 6.54 0.60 36.4 1,369 2.3 603 1,382 19,833 23,800 17 0.2 10 18 19 100 5 5.49 6.4 90 37.2 1994 6.11 0.89 39.2 1,360 4.0 712 1,630 20,333 24,400 15 0.2 11 14 32 134 7 6.02 7.0 292 44.0 1995 6.01 0.78 36.4 1,322 9.2 684 1,567 20,126 24,111 24 0.5 11 14 36 99 12 4.65 5.2 91 27.8 1996 6.22 0.61 37.6 1,299 8.4 687 1,573 14 1.0 4 16 30 79 6 3.92 4.3 39 31.1 1997 6.03 0.30 42.5 1,157 2.6 556 1,273 21 1.0 7 14 12 40 2 3.26 3.5 27 36.9 1998 5.99 0.27 41.7 1,342 3.2 620 1,420 38 1.2 8 11 10 35 2 3.10 3.2 32.8 1999 6.38 0.31 42.7 1,490 3.1 740 1,697 34 1.5 4 16 15 39 3 2.57 2.4 39.4 2000 6.04 0.26 44.1 1,416 5.3 723 1,655 19,550 23,475 44 < 1.0 8 18 16 27 6 1.69 1.4 37.0 2001 6.38 0.42 42.1 1,358 3.4 690 1,582 17,125 20,550 42 2.3 4 17 17 60 4 3.46 3.6 65 36.3 2002 6.58 0.50 44.2 1,586 3.1 803 1,837 18,975 22,775 37 1.5 4 19 20 76 4 4.01 4.3 63 40.8 2003 6.47 0.36 45.0 1,553 1.9 858 1,965 19,055 22,850 35 1.0 9 18 17 47 3 3.07 3.1 42 35.0 2004 6.27 0.42 43.3 1,493 5.2 858 1,965 18,650 22,375 43 1.3 7 17 15 59 3 3.67 3.9 55 25.4 2005 6.29 0.43 41.3 1,525 3.8 908 2,080 18,950 22,725 42 1.0 9 17 26 44 4 2.35 2.1 56 21.2 2006 5.96 0.46 43.9 1,380 4.2 857 1,963 15,443 18,525 44 0.9 13 18 15 78 3 5.21 5.9 56 38.4 2007 6.48 0.46 44.8 1,760 2.3 693 1,585 8,630 10,350 35 0.1 19 19 81 3 4.66 5.2 57 17.3 2008 6.46 0.47 41.2 1,347 3.7 698 1,598 3,592 4,300 24 0.1 18 18 83 3 4.92 5.5 46 26.2 2009 6.39 0.54 44.6 1,885 8.2 703 1,610 3,223 3,875 14 0.1 11 19 15 90 3 5.59 6.4 56 23.2 2010 6.24 0.64 44.8 2,113 12.8 729 1,668 3,466 4,150 25 0.1 28 20 26 88 5 4.44 4.9 64 26.2 2011 6.12 0.50 43.0 1,660 13.3 554 1,268 4,913 5,875 29 0.1 44 18 28 57 6 2.85 2.9 24 25.0 2012 6.38 0.92 44.2 1,983 12.0 690 1,580 3,092 3,725 24 0.2 45 19 48 107 11 4.21 4.6 157 19.8 2013 6.26 0.56 46.0 1,838 8.9 584 1,338 3,888 4,675 23 0.3 23 18 27 77 4 3.68 3.9 60 19.3 2014 6.44 0.55 44.5 1,998 7.7 615 1,408 4,473 5,375 25 0.3 17 17 29 74 6 3.54 3.7 33 22.2 2015 6.18 0.64 41.2 2,067 11.2 420 965 4,229 5,075 30 0.1 21 17 25 97 15 4.37 4.8 42 12.8 2016 6.84 0.97 45.5 2,893 23.6 349 798 4,747 5,700 26 0.1 17 19 75 93 12 3.33 3.5 95 19.6 2017 6.90 0.62 42.7 2,158 15.7 469 1,075 2,524 3,025 16 0.1 19 20 59 41 8 1.44 1.5 39 16.4 2018 6.75 1.13 38.1 2,603 32.8 335 766 3,099 3,733 18 0.1 33 19 83 61 34 1.66 1.4 225 22.7 2019 6.34 0.96 39.4 2,520 26.8 975 2,230 3,750 4,520 23 0.05 28 17 68 35 16 1 1.2 488 16.6 2020 6.78 0.56 41.3 2,175 12.5 537 1,230 3,743 4,508 22 0.13 9 16 38 43 7 2 1.4 431 12.7 2021 7.24 0.65 43.5 2,373 9.8 644 1,475 3,133 3,775 7 0.58 9 19 50 29 8 1 1.0 388 13.9 Maximum 7.24 1.55 56.3 2,893 32.8 975 2,230 21,633 25,960 44 2.3 44.5 20 83 173 34 6.16 7.2 488 56.4 Minimum 4.96 0.26 29.3 1,157 0.5 335 766 2,524 3,025 7 0.1 4 11 10 27 2 1.03 1.0 24 12.7 Average 6.26 0.63 42.0 1,754 6.7 667 1,527 12,892 15,471 27 0.5 17 17 29 75 7 3.77 4.1 122 28.1 #Tests 41 41 41 41 41 41 41 37 37 41 41 39 41 39 39 38 38 38 36 37 Site: S6a Ranch : Neddenriep pH Salinity 10 5 9 4 8 E 3 C. 7 fA � 2 6 5 1 4 2222. t pH Linear(pH) Salinity Linear(Salinity) Cation Exchange Capacity Sodium Adsorption Ratio 50 15 40 10 0 30 a y E 20 10 0 0 t CEC Linear(CEC) t SAR Linear(SAR) Site S7a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Bruns Type: JaC 2021 Inches: 06-12 EC TKN NO, P PZOS K K2O Cu Mo SO4 CEC Ca Na Mg Exch CI Exch P Date pH mS/cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg.Kg me/100g mg/L mg/L mg/L SAR Na% mg/L mg/L 01/19/21 5.89 0.176 39.8 1570 2.2 674 1542 2010 2,420 12.6 0.53 5 14.6 49.1 10.9 5.03 0.400 < 1.00 500 9.89 04/15/21 5.89 0.141 41.1 1560 1.99 871 1993 2450 2,950 11.7 0.91 6 16.3 55.6 11.0 3.49 0.390 < 1.00 425 14.1 08/12/21 5.63 0.408 35.5 1630 9.69 1300 2975 2540 3,060 6.1 0.37 19 14.7 46.9 10.5 6.97 0.38 < 1.00 300 6.19 11/08/21 5.84 0.219 36.9 2100 3.48 772 1767 2580 3,110 5.2 0.68 1 16.6 48.5 8.21 21.2 0.25 < 1.00 250 30.5 Maximum 5.89 0.408 41.1 2,100 9.7 1,300 2,975 2,580 3,110 12.6 0.91 19 16.6 55.6 11.00 21.20 0.40 < 1.00 500 30.5 Minimum 5.63 0.141 35.5 1,560 2.0 674 1,542 2,010 2,420 5.2 0.37 1 14.6 46.9 8.21 3.49 0.25 < 1.00 250 6.19 Average 5.81 0.236 38.3 1715 4.3 904 2,069 2,395 2,885 8.9 0.62 8 15.6 50.0 10.15 9.17 0.36 < 1.00 369 15.17 #Tests 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Site S7a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Bruns Type: JaC From: 1981 Inches: 06-12 To: 2021 EC TKN NO3 P P2O5 K K2O Cu Mo SOa CEC Ca Na Mg Exch Cl Exch P Year pH mS/cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg me/100g mg/L mg/L mg/L SAR Na% mg/L mg/L 1981 5.58 0.67 37.5 1,384 0.9 301 689 20,371 24,445 305 0.8 17 13 1982 5.77 0.26 39.4 1,728 4.5 520 1,191 18,522 22,226 33 0.5 14 13 1983 5.98 0.15 41.2 1,864 0.8 611 1,399 19,125 22,950 31 0.6 17 16 17 12 22 1984 5.87 0.17 40.8 1,858 0.9 574 1,314 21,964 26,357 31 0.7 8 15 14 19 3 1.29 1.0 12 1985 5.83 0.20 41.7 2,085 0.7 678 1,553 21,717 26,060 29 0.4 5 14 15 14 3 0.83 0.1 15.0 7.7 1986 5.84 0.18 40.4 1,946 0.5 606 1,388 20,067 24,080 32 0.4 6 14 15 11 3 0.70 < 1.0 15.0 7.2 1987 5.93 0.18 40.1 1,907 0.3 645 1,477 21,909 26,291 31 0.5 5 14 17 12 4 0.68 < 1.0 17.0 8.7 1988 6.05 0.24 40.9 2,098 0.5 630 1,443 20,000 24,000 33 0.5 9 15 27 15 6 0.66 < 1.0 15.0 10.1 1989 6.10 0.20 39.7 2,003 0.6 549 1,257 21,636 25,964 31 0.2 7 14 24 9 6 0.45 1.0 20.0 8.0 1990 6.30 0.19 39.1 3,063 0.7 564 1,291 18,625 22,350 23 0.4 7 14 21 10 5 0.49 1.0 20.0 5.8 1991 6.30 0.22 39.0 1,765 1.6 649 1,487 21,083 25,300 24 0.6 6 14 26 10 6 0.47 < 1.0 10.0 9.7 1992 6.27 0.30 37.9 1,882 3.1 668 1,530 20,667 24,800 23 0.6 5 17 32 11 8 0.44 < 1.0 22.0 9.5 1993 6.13 0.20 35.4 1,583 1.8 598 1,368 22,417 26,900 17 0.3 5 17 18 7 4 0.40 < 1.0 8.0 12.9 1994 6.14 0.18 37.4 1,607 1.4 683 1,563 23,083 27,700 14 0.3 7 15 20 9 5 0.46 < 1.0 7.0 7.3 1995 6.11 0.23 35.7 1,464 3.4 698 1,576 19,756 23,667 22 0.8 4 15 21 9 5 0.47 1.0 7.0 4.8 1996 6.15 0.26 36.1 1,445 2.7 644 1,475 15 1.0 1 15 24 17 6 0.64 1.1 7.0 4.1 1997 6.15 0.16 39.8 1,472 2.9 639 1,464 18 1.0 1 13 15 8 4 0.52 1.0 5.0 3.5 1998 6.21 0.13 39.9 1,511 32.4 900 2,060 32 1.2 33 11 12 9 3 0.60 < 1.0 5.1 1999 6.12 0.15 43.6 1,898 12.1 885 2,027 65 1.8 2 17 16 10 3 0.63 < 1.0 8.6 2000 6.29 0.15 39.3 1,683 2.8 850 1,945 20,225 24,300 45 < 1.0 51 16 12 13 3 0.92 < 1.0 5.8 2001 6.06 0.28 42.8 1,788 5.2 815 1,867 20,150 24,200 47 2.3 2 18 29 11 6 0.51 < 1.0 9.0 11.1 2002 6.14 0.37 38.9 1,705 9.9 790 1,810 20,325 24,400 40 1.3 2 17 35 14 8 0.64 < 1.0 8.0 10.7 2003 6.46 0.21 40.0 1,578 3.2 845 1,938 20,950 25,150 41 1.5 3 16 22 6 5 0.32 1.0 4.6 9.0 2004 6.33 0.20 41.1 1,725 2.9 978 2,240 21,150 25,375 48 1.3 4 18 19 7 4 0.36 < 1.0 6.3 10.9 2005 6.25 0.16 43.4 1,800 2.8 1,023 2,343 19,900 23,875 46 1.3 3 18 17 6 3 0.36 < 1.0 3.4 8.4 2006 6.10 0.15 42.7 1,598 2.6 910 2,085 17,084 20,500 49 0.8 2 14 14 6 3 0.37 < 1.0 3.3 8.5 2007 5.96 0.19 44.1 2,058 1.2 699 1,600 8,629 10,350 34 0.2 17 22 9 4 0.47 < 1.0 7.9 6.0 2008 6.03 0.22 41.8 1,715 4.7 622 1,425 4,547 5,425 25 0.1 17 28 9 5 0.43 < 1.0 6.3 6.1 2009 5.78 0.21 42.7 1,938 4.1 674 1,545 5,502 6,625 15 0.2 7 17 18 11 4 0.62 < 1.0 7.9 5.6 2010 6.09 0.24 41.9 2,285 3.6 632 1,448 5,120 6,150 29 0.1 9 17 27 8 6 0.36 < 1.0 6.2 5.4 2011 5.82 0.25 39.8 1,705 7.5 548 1,255 6,217 7,450 31 0.1 38 16 23 8 5 0.39 < 1.0 5.2 4.5 2012 5.87 0.25 40.4 1,727 7.6 505 1,155 4,920 5,900 25 0.1 43 15 24 9 5 0.46 < 1.0 7.1 7.6 2013 5.76 0.27 41.7 1,833 4.6 465 1,063 6,225 7,450 25 0.3 19 14 30 9 5 0.43 < 1.0 13.5 6.3 2014 5.75 0.26 43.7 2,183 6.7 574 1,315 4,683 5,600 26 0.2 14 16 27 8 5 0.38 < 1.0 4.8 7.2 2015 5.55 0.45 41.7 2,758 13.3 556 1,273 4,305 5,150 29 0.2 20 17 42 12 24 0.37 < 1.0 3.8 10.4 2016 5.76 0.26 42.1 2,613 6.8 473 1,083 6,355 7,625 24 0.2 13 16 25 7 6 0.39 < 1.0 5.0 13.9 2017 5.81 0.38 40.9 2,428 12.3 363 833 3,641 4,375 20 0.1 23 17 37 8 8 0.32 < 1.0 6.1 11.3 2018 5.79 0.31 35.6 2,183 5.5 475 1,087 4,095 4,933 22 0.1 27 16 36 19 8 0.68 1.0 128 8.8 2019 5.80 0.27 37.9 2,230 6.18 511 1,170 4,240 5,110 26 0.04 24 14 37 9 7 0.36 < 1.0 400 9.3 2020 5.88 0.19 40.7 2,160 3.00 679 1,550 3,965 4,780 22 0.32 4 16 20 12 9 0.58 < 1.0 448 15.2 2021 5.81 0.24 38.3 1,715 4.34 904 2,069 2,395 2,885 9 0.62 7.75 16 50 10 9 0.36 < 1.0 369 15.2 Maximum 6.46 0.67 44.1 3,063 32.4 1,023 2,343 23,083 27,700 305 2.3 51 18 50 19 24 1.29 1.1 447.5 15.2 Minimum 5.55 0.13 35.4 1,384 0.3 301 689 2,395 2,885 9 0.0 1 11 12 6 3 0.32 0.1 3.3 3.5 Average 6.00 0.24 40.2 1,902 4.7 657 1,504 14,204 17,046 36 0.6 12 15 24 10 6 0.52 1.0 46.0 8.4 #Tests 41 41 41 41 41 41 41 37 37 41 41 39 41 39 39 38 38 38 36 37 Site: S7a Ranch : Bruns pH Salinity 10 5 9 4 8 E 3 C. 7 fA E 2 6 5 1 4 0 t pH Linear(pH) Salinity Linear(Salinity) Cation Exchange Capacity Sodium Adsorption Ratio 50 15 40 10 aM 30 0 a E 20 CO) 5 10 0 0 t CEC Linear(CEC) t SAR Linear(SAR) ALPINE COUNTY MONITORING WELLS Site: ACMW-01AW SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 1/13/2021 7.51 5485.62 11.3 6.86 26.7 0.022 < 0.10 < 0.020 < 0.010 0.023 0.10 59 4/13/2021 4.92 5488.21 7.7 6.89 26.6 0.021 0.062 < 0.020 < 0.010 0.076 0.138 57 7/1/2021 4.54 5488.59 12.4 6.43 31.9 0.024 < 0.050 < 0.020 < 0.010 0.208 0.210 68 10/28/2021 8.87 5484.26 14.2 6.62 38.8 0.029 0.230 < 0.020 < 0.010 2.43 2.66 86 Maximum 8.87 5488.6 14.2 6.89 38.8 0.029 0.230 < 0.020 < 0.010 2.430 2.66 86 Minimum 4.54 5484.3 7.7 6.43 26.6 0.021 < 0.050 < 0.020 < 0.010 0.023 0.100 57 Average 6.46 5486.7 11.4 6.70 31.0 0.024 0.111 < 0.020 < 0.010 0.684 0.777 68 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-01AW SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Fecal EC Chloride COD SO4 Color Coli E. coli Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 1/13/2021 63.4 1.49 2.00 < 1 < 1 4/13/2021 71.1 3.11 2.21 411 < 1 7/1/2021 75.7 1.91 2.18 18.7 1 10/28/2021 115 5.23 1.67 219 1 Maximum 115 5.23 2.21 411.0 1 Minimum 63.4 1.49 1.67 < 1 < 1 Average 81.3 2.94 2.02 162.4 1 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-01AW SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 1989 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 89 9.0 5480.7 10.4 6.86 41.0 26 46.02 0.142 0.107 0.027 < 0.010 0.306 0.387 90 7.7 5481.1 11.1 6.91 61.0 54 36.80 0.090 0.084 0.021 < 0.010 0.278 0.373 91 7.1 5481.6 11.1 7.26 41.0 38 32.73 0.087 0.106 0.040 0.012 0.233 0.350 92 7.8 5480.9 11.4 6.79 58.0 52 1.52 0.035 0.106 0.026 0.010 0.211 0.327 93 7.2 5481.5 11.3 6.85 52.0 51 16.25 0.036 0.116 0.027 0.011 0.588 0.715 94 7.9 5481.9 10.2 6.82 46.0 39 3.77 0.028 0.088 0.029 0.010 0.229 0.326 95 6.5 5482.2 11.6 6.55 64.0 63 1.60 0.023 0.103 0.031 0.011 1.054 1.168 96 6.3 5482.4 12.2 6.50 64.0 58 16.87 0.074 0.097 0.022 0.010 0.542 0.648 97 7.4 5481.3 11.9 6.49 55.0 49 2.93 0.033 0.104 0.037 0.011 1.013 1.129 98 6.3 5482.4 11.3 6.27 44.0 48 1.07 0.028 0.132 0.021 0.012 0.312 0.457 99 6.3 5482.4 11.2 6.26 44.0 44 2.23 0.026 0.108 < 0.020 < 0.010 0.204 0.322 00 6.2 5482.5 10.8 6.71 43.0 52 1.26 0.041 0.160 0.020 < 0.010 0.604 0.701 01 6.8 5481.9 10.7 6.82 35.0 45 9.89 0.062 0.142 0.036 < 0.020 0.380 0.578 02 6.3 5482.4 10.5 6.50 34.0 54 14.63 0.038 0.126 < 0.017 0.611 1.011 03 6.9 5481.8 11.2 6.93 39.1 1.85 0.024 0.112 < 0.015 0.870 1.263 04 6.0 5482.7 10.1 6.77 42.7 63 3.40 0.025 0.110 0.020 < 0.015 1.215 1.633 05 6.1 5482.6 9.7 6.75 41.8 48 10.25 0.033 0.129 < 0.009 0.516 0.629 06 5.0 5483.7 10.8 6.74 38.2 33 15.77 0.045 0.440 < 0.010 0.132 0.309 07 6.1 5482.6 11.0 6.48 41.8 37 11.45 0.032 0.055 < 0.011 0.362 0.400 08 5.6 5483.1 10.5 6.64 42.4 35 26.04 0.050 0.081 < 0.013 1.282 1.329 09 5.7 5483.0 9.4 6.63 36.7 37 23.53 0.068 0.081 < 0.010 0.683 0.813 10 5.3 5483.4 9.3 6.33 44.0 63 10.75 0.030 0.065 < 0.020 1.989 2.041 11 5.3 5483.4 10.1 6.79 40.5 33 19.65 0.041 < 0.055 < 0.012 0.491 0.484 12 6.7 5486.5 10.6 6.75 31.7 0.049 0.072 0.022 < 0.010 0.177 0.275 13 6.3 5486.9 10.7 6.75 46.0 0.042 0.102 0.028 < 0.010 0.108 0.176 14 7.5 5485.6 10.7 6.73 38.1 0.153 0.082 0.021 < 0.011 0.143 0.165 15 11.2 5482.0 11.0 6.67 33.8 0.022 0.054 0.020 < 0.010 0.121 0.152 16 6.3 5486.8 11.4 6.57 35.4 0.032 < 0.055 < 0.020 < 0.010 0.542 0.488 17 5.8 5487.3 11.4 6.55 38.5 0.022 < 0.083 0.028 < 0.010 0.389 0.391 18 7.56 5485.6 12.1 6.57 37.8 0.030 0.080 0.023 < 0.010 0.482 0.496 19 7.77 5485.4 11.3 6.32 34.7 0.022 < 0.080 < 0.020 < 0.013 1.134 1.163 20 7.72 5485.4 11.5 6.56 37.4 0.024 < 0.120 < 0.020 < 0.010 0.281 0.326 21 6.46 5486.7 11.4 6.70 31.0 0.024 0.111 < 0.020 < 0.010 0.684 0.777 Maximum 11.2 5487.3 12.2 7.26 64.0 63 46.02 0.153 0.440 0.040 < 0.020 1.989 2.041 Minimum 5.0 5480.7 9.3 6.26 31.0 26 1.07 0.022 0.054 < 0.020 < 0.009 0.108 0.152 Average 6.8 5483.3 10.9 6.66 42.8 46 13.49 0.046 0.107 0.025 0.012 0.550 0.661 #Tests 33 33 33 33 33 22 23 33 33 24 33 33 33 Site: ACMW-01AW SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2021 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 89 78 97 1.6 5 6.35 3 < 2 90 94 123 1.5 6 5.43 < 5 2 < 2 91 84 88 1.5 < 5 6.95 < 5 3 < 2 92 87 122 2.0 < 5 3.33 < 5 2 < 2 93 92 120 2.8 5 5.52 < 5 2 2 < 2 94 77 106 3.0 < 5 4.42 10 2 < 2 95 106 162 7.6 5 3.02 5 7 2 96 109 147 5.0 2 4.39 5 12.3 1 97 97 132 4.3 2 3.28 5 2.3 1 98 77 101 2.6 < 5 1.84 < 5 3.4 < 1.1 99 77 104 1.7 < 5 3.03 5 2.3 1.1 00 79 101 3.3 < 5 1.86 < 5 1.2 < 1.1 01 76 83 2.9 8 2.28 30 1.7 < 1.1 02 78 89 4.3 < 5 2.58 < 5 1.3 < 1.1 03 84 104 4.6 5 2.62 5 1.1 1.1 04 89 119 7.1 6 2.77 10 1.3 < 1.1 05 82 108 4.6 < 5 3.64 18 1.2 < 1.1 06 84 92 1.8 < 5 3.83 1.3 < 1.1 07 79 95 1.7 7 2.33 < 1.1 < 1.1 08 91 107 3.7 < 5 2.80 60 < 1.3 < 1.1 09 86 94 3.1 6 2.74 1.5 < 1.1 10 96 132 7.3 < 5 2.61 1.1 < 1.1 11 90 99 2.5 5 4.01 1.2 < 1.1 12 81 70 1.1 2.31 1.7 < 1.1 13 83 96 1.3 3.24 1.4 < 1.1 14 75 83 1.4 3.78 1.9 < 1.1 15 70 79 1.4 4.73 2.4 < 1.0 16 95 118 1.6 5.30 9.6 < 1.0 17 78 90 2.0 3.61 1.0 < 1.0 18 79 81.7 2.50 3.48 1.5 < 1.0 19 94 123 4.72 2.32 1.0 < 1.0 20 69 85.8 1.82 1.73 1.5 < 1.0 21 68 81.3 2.94 2.02 162.4 1.0 Maximum 109 162 7.6 8 6.95 60 162.4 2.0 < 2 Minimum 68 70 1.1 2 1.73 < 5 1.0 < 1.0 < 2 Average 84 104 3.1 5 3.46 11 7.3 1.3 < 2 #Tests 33 33 33 23 33 17 33 33 1 Site AC MW-01 AW Nitrate-Nitrogen and Water Level Chlorides 5 5495 50 4 5490 40 w 3 5485 y J ' 30 m J J E y a1 2 5480 � 20 1 5475 10 Q 5470 Q 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 Nitrate f Water Level Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 0.50 400 0.40 300 0.30 J J E 200 0.20 100 0.10 0 0.00 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 TDS Linear(TDS) Total P Linear(Total P) Annual Metal Report ACMW-01AW Main Dam Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 10/31/1988 12 1.1 3.6 6.8 <10 2400 <4 40 <0.1 <10 <20 820 <0.2 90 <5 <50 <1 <1 <10 11/28/1989 9.4 1 4.1 6.1 <10 1300 <10 110 <1 <10 <50 1700 <1 120 <10 <5 <50 8/1/1990 12 1.5 3.7 7.1 <10 1100 <4 84 <0.1 <10 <20 860 <0.2 100 1 <1 <10 8/21/1991 9 1 3.1 5.2 <10 600 <4 61 <0.1 <10 <20 550 <0.2 64 2 <1 <10 7/21/1992 14 1 4 7.2 <10 76 <4 55 <0.1 <10 <20 72 <0.2 <10 <1 <1 <10 7/12/1994 11 0.9 3.2 5.4 <10 660 <2 45 0.1 <10 <20 410 <0.2 7.1 <1 <1 7.2 8/15/1995 15 1.1 4.4 6.8 <10 310 <1 65 <0.1 <10 <10 160 <0.2 <5 <1 <1 <5 6/19/1996 18 1.2 5.3 6.9 <10 120 <1 76 <0.1 <10 <10 <30 <0.2 <5 <1 <1 <5 6/16/1997 14 1.4 4.3 7.2 <10 250 <2 56 <0.5 <10 <25 200 <0.5 <10 <5 <5 <50 7/21/1998 12.3 0.918 3.36 5.15 <10 <25 <2 <100 <0.5 <10 <20 83.4 <0.5 <20 <2.5 <5 <25 6/20/1999 5.71 0.548 1.76 2.99 <10 530 <2 <100 <1 0.28 <10 <20 115 <0.2 <20 <5 <2.5 <3 <1 <1 <10 7/18/2000 7.4 0.928 2.84 5.38 <10 <2 <100 <20 367 <20 <2.5 <10 6/19/2001 6.65 0.760 2.01 4.25 <10 <2 <100 <20 548 <20 <2.5 <10 6/18/2002 6.61 0.878 2.13 4.32 <10 400 <2 35 <0.2 <0.2 <1 <20 372 0.02 <20 <1 <2.5 <1 <2 <0.2 <10 6/17/2003 7.18 0.938 2.42 4.84 <10 300 <2 35.7 <0.2 <0.2 <1 <20 242 <0.01 <20 <1 <2.5 <1 <2 <0.2 <10 5/18/2004 7.78 0.866 2.46 4.83 <10 440 <2 <100 <0.2 <0.2 <1 <20 339 0.01 <20 <1 <2.5 <1 <2 <0.2 <10 6/14/2005 8.73 0.793 2.72 4.64 <10 <2 <100 <20 507 <20 <2.5 <10 6/1/2006 7.84 1.11 2.76 4.91 <10 1200 3.42 <2 <2 <2 <20 1890 <0.2 23.8 <2 2 <2.5 <2 <10 <1 2 169 6/19/2007 8.90 0.894 2.53 5.11 <10 420 <2 37 <1 <0.5 <1 <20 25.3 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/4/2008 9.84 1.24 3.3 6.13 <10 4300 2.92 68 <1 <0.5 <1 <20 141 <0.2 26.8 <2 <5 <2.5 <1 <5 <1 <3 <10 6/17/2009 8.15 0.932 2.46 5.68 <10 830 <2 41 <1 <0.5 <1 <20 416 <0.2 33.9 <2 <5 <2.5 <1 <5 <1 <3 11.3 6/9/2010 14.0 1.10 4.2 6.80 <0.5 88 <1 63 <1 <0.5 <1 <2 56 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2011 8.41 1.01 2.86 5.58 <0.5 2430 <1 47.9 <1 <0.5 <1 <2 1100 <0.2 8.11 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2012 854 6.02 87.5 <1 <0.5 8.42 <0.2 5.47 13.4 <1 <5 <1 13.3 6/18/2013 9.77 1.05 2.7 5.53 6/17/2014 7.79 <1 2.48 5.05 <0.5 151 1.46 36.5 <1 <0.5 <1 <2 405 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/15/2015 8.13 <1 2.51 4.56 <0.5 218 <1 40.1 <1 <0.5 <1 <10 179 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/12/2016 7.63 1.03 2.47 4.26 <0.5 1960 <1 46.9 <1 <0.5 1.03 <2 1610 <0.2 16.7 <2 <5 <0.5 <1 <5 <1 <3 <20 7/19/2017 8.78 1.03 2.6 4.58 <0.5 676 <1 44.4 <1 <0.5 <1 <2 647 <0.2 3.29 <2 <5 <0.5 <1 <5 <1 <3 <20 8/6/2018 8.27 <1 2.35 4.68 <0.5 399 <1 41.6 <1 <0.5 <1 <2 235 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/13/2019 5.87 <1.0 1.72 3.97 <0.5 1580 <1 32.2 <1 <0.5 <1 <2 909 <0.2 3.88 <2 <5 <0.5 <1 <5 <1 <3 <20 7/15/2020 8.39 <1 2.41 4.74 <0.5 418 <1 41.2 <1 <0.5 <1 <2 187 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/1/2021 7.19 <1.0 2.06 5.02 <0.5 593 <1 36.4 <1 <0.5 1.16 <2 385 <0.2 2.21 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-01BE SOUTH TAHOE PUBLIC UTILITY DISTRICT LLPINE COUNTY GROUNDWATER QUALITY DAT 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 1/13/2021 11.80 5491.75 10.6 6.68 50.4 0.031 < 0.10 < 0.020 < 0.010 0.122 0.12 77 4/13/2021 9.19 5494.36 8.5 6.53 50.5 0.028 < 0.050 < 0.020 < 0.010 0.191 0.230 84 7/1/2021 9.70 5493.85 9.5 6.75 48.4 0.028 < 0.050 < 0.020 < 0.010 0.219 0.216 81 10/28/2021 15.77 5487.78 9.9 6.68 48.0 0.032 < 0.050 < 0.020 < 0.010 0.241 0.205 83 Maximum 15.77 5494.4 10.6 6.75 50.5 0.032 < 0.100 < 0.020 < 0.010 0.241 0.23 84 Minimum 9.19 5487.8 8.5 6.53 48.0 0.028 < 0.050 < 0.020 < 0.010 0.122 0.12 77 Average 11.62 5491.9 9.6 6.66 49.3 0.030 < 0.063 < 0.020 < 0.010 0.193 0.193 81 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-01BE SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Fecal EC Chloride COD SO4 Color Coli E.coli Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 1/13/2021 104 1.36 0.846 < 1 < 1 4/13/2021 110 1.46 1.93 < 1 < 1 7/1/2021 105 1.60 1.17 < 1 < 1 10/28/2021 102 1.66 0.882 12.2 < 1 Maximum 110 1.66 1.93 12.2 < 1 Minimum 102 1.36 0.85 < 1 < 1 Average 105 1.52 1.21 4 < 1 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-01BE SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 1989 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 89 10.5 5491.8 9.8 7.05 72.0 50 8.22 0.040 0.109 0.035 < 0.012 0.371 0.456 90 10.1 5491.0 9.1 7.02 51.0 40 4.37 0.025 0.085 0.025 < 0.010 0.157 0.252 91 18.2 5482.9 9.7 7.23 57.0 46 18.50 0.063 0.093 0.038 0.011 0.185 0.288 82 12.9 5488.2 10.4 6.91 50.0 39 24.00 0.053 0.113 0.028 0.010 0.163 0.287 83 10.8 5490.3 10.2 6.87 63.0 67 7.75 0.031 0.069 0.021 0.010 0.728 0.807 94 11.1 5490.0 10.4 6.62 60.0 56 2.07 0.030 0.083 0.025 0.010 0.318 0.410 95 8.1 5493.0 9.8 6.67 69.0 66 0.73 0.025 0.197 0.047 0.011 0.405 0.613 96 7.9 5493.2 11.2 6.44 67.0 66 1.74 0.018 0.099 0.020 0.011 0.438 0.548 97 11.1 5490.1 11.0 6.35 68.0 68 1.50 0.019 0.088 0.021 0.018 0.821 0.928 98 8.4 5492.7 10.1 6.24 52.0 47 3.10 0.022 0.116 < 0.020 < 0.010 0.541 0.668 99 9.0 5492.1 10.1 6.29 56.0 55 0.76 0.021 0.111 < 0.020 < 0.010 0.449 0.570 00 9.7 5491.4 10.6 6.81 47.0 39 5.80 0.029 0.100 0.022 < 0.010 0.169 0.233 01 11.6 5489.5 10.2 6.80 43.0 31 3.91 0.031 0.109 0.020 < 0.010 0.200 0.319 02 9.9 5491.2 8.6 6.52 37.0 30 10.11 0.029 0.126 < 0.010 0.142 0.284 03 11.5 5489.6 9.8 6.84 39.6 7.77 0.026 0.099 0.012 0.587 0.687 04 10.0 5491.1 9.8 6.57 43.6 25 4.25 0.039 0.119 < 0.020 < 0.010 0.128 0.263 05 9.5 5491.6 11.1 6.47 42.4 35 4.35 0.027 0.089 < 0.010 0.204 0.222 06 5.8 5495.3 11.3 6.41 44.9 38 12.40 0.027 0.203 < 0.010 0.425 0.580 07 10.5 5490.6 11.1 6.31 38.7 30 13.80 0.037 0.055 < 0.010 0.125 0.163 08 11.6 5489.5 9.4 6.53 33.2 33 9.35 0.039 0.073 < 0.010 0.193 0.233 09 12.3 5488.8 9.3 6.50 40.2 34 6.07 0.144 0.084 < 0.010 0.198 0.250 10 10.5 5490.6 9.7 6.47 46.7 38 7.95 0.031 < 0.050 < 0.010 0.242 0.279 11 8.0 5493.1 10.3 6.17 56.7 59 7.10 0.039 < 0.060 < 0.010 0.886 0.849 12 12.7 5490.9 8.5 6.27 53.9 0.027 < 0.046 0.023 < 0.010 0.279 0.373 13 10.8 5492.7 7.3 6.29 47.6 0.067 < 0.080 0.025 < 0.009 0.177 0.228 14 12.4 5491.2 8.2 6.50 50.0 0.043 0.052 0.021 < 0.011 0.151 0.139 15 13.9 5489.7 10.5 6.81 61.1 0.026 < 0.050 0.020 < 0.010 0.143 0.159 16 8.8 5494.8 8.5 6.34 76.2 0.076 < 0.055 < 0.020 < 0.010 0.213 0.181 17 6.0 5497.5 9.6 6.43 50.2 0.025 < 0.083 0.023 < 0.010 0.421 0.411 18 11.2 5492.3 8.8 6.57 47.0 0.035 < 0.080 0.022 < 0.010 0.168 0.192 19 7.2 5496.4 7.9 6.25 41.4 0.029 < 0.087 < 0.020 < 0.013 0.130 0.187 20 11.1 5492.5 9.8 6.41 49.0 0.032 < 0.143 < 0.020 < 0.010 0.147 0.218 21 11.6 5491.9 9.6 6.66 49.3 0.030 < 0.063 < 0.020 < 0.010 0.193 0.193 Maximum 18.2 5497.5 11.3 7.23 76.2 68 24.00 0.144 0.203 0.047 0.018 0.886 0.928 Minimum 5.8 5482.9 7.3 6.17 33.2 25 0.73 0.018 0.046 < 0.020 < 0.009 0.125 0.139 Average 10.4 5491.4 9.7 6.56 51.6 45 7.20 0.037 0.093 0.024 0.011 0.306 0.378 #Tests 33 33 33 33 33 22 23 33 33 24 33 33 33 Site: ACMW-01 BE SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY Dp From 1989 To: 2021 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 89 101 168 3.1 5 4.63 < 2 < 2 90 75 112 1.5 6 3.64 < 5 < 2 < 2 91 88 118 1.7 < 5 6.01 < 5 3 < 2 82 80 105 1.4 6 5.17 < 5 2 < 2 83 103 140 1.7 13 4.49 < 5 < 2 2 < 2 94 85 129 1.7 < 5 3.54 < 4 < 2 < 2 95 94 144 1.9 5 2.90 5 2 2 96 99 140 1.8 2 2.19 5 1 1 97 102 145 2.1 4 2.89 5 1 1 98 80 111 1.1 < 5 2.05 < 5 < 1.0 < 1.1 99 86 121 1.3 < 5 2.63 < 5 < 1.2 < 1.1 00 77 97 0.9 < 5 1.49 < 5 < 1.1 < 1.1 01 69 85 1.4 8 1.27 13 < 1.1 < 1.1 02 66 81 2.5 < 5 1.29 10 < 1.1 < 1.1 03 77 90 1.9 5 1.62 8 1.1 1.1 04 79 91 1.7 < 5 1.76 8 < 1.1 < 1.1 05 75 92 1.5 < 5 1.56 5 < 1.1 < 1.1 06 83 97 1.3 < 5 1.33 < 1.1 < 1.1 07 74 83 1.2 5 1.39 < 1.1 < 1.1 08 71 74 1.8 < 5 1.61 20 < 1.4 < 1.1 09 83 89 1.5 5 1.13 < 1.1 < 1.1 10 79 103 1.3 < 5 1.22 < 1.1 < 1.1 11 95 125 1.9 < 7 1.33 < 1.1 < 1.1 12 97 112 1.4 1.95 < 1.1 < 1.1 13 86 100 1.4 1.98 < 1.1 < 1.1 14 89 101 1.4 2.31 < 1.1 < 1.1 15 98 128 1.4 3.03 < 1.0 < 1.0 16 121 156 1.6 2.83 < 1.0 < 1.0 17 91 110 2.1 2.56 < 1.0 < 1.0 18 87 95 1.20 3.10 < 1.0 < 1.0 19 74 90 1.60 2.49 < 1.0 < 1.0 20 84 102 1.37 1.58 < 1.0 < 1.0 21 81 105 1.52 1.21 3.8 < 1.0 Maximum 121 168 3.1 13 6.01 20 3.8 2.0 < 2 Minimum 66 74 0.9 2 1.13 < 4 < 1 < 1.0 < 2 Average 86 110 1.6 6 2.43 7 1.4 1.3 < 2 #Tests 33 33 33 23 33 17 33 33 1 Site ACMW-01 BE Nitrate-Nitrogenand Water Level Chlorides 5 5510 50 — 4 5500 40 3 5490 J 30 - J N J 2 5480 20 1 5470 10 - 0 5460 p rn M n rn M N n m � rn m �n n rn m in r rn M °� ro rn ro rn rn rn o 0 0 0 0 � N ro m ro rn rn rn o 0 0 0 0 � N Nitrate Water Level Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 - 0.20 400 0.15 300 rn rn 0.10 200 100 0.05 0 0.00 �M TDS Linear(TDS) Total P Linear(Total P) Annual Metal Report ACMW-01BE Auxiliary Dam Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 10/31/1988 10 1.4 4.6 7.1 <10 700 <4 30 <0.1 <10 <20 690 <0.2 420 <5 <50 <1 <1 <10 11/28/1989 12.5 1 5 13.8 <10 110 <10 <100 <1 <10 <50 150 <1 120 <10 <5 <50 8/1/1990 8.8 0.6 3.3 5.3 <10 90 <4 34 <0.1 <10 <20 37 <0.2 25 <1 <1 <10 8/21/1991 11 0.9 5 5.4 <10 210 <4 49 <0.1 <10 <20 180 <0.2 54 <1 <1 <10 7/21/1992 10 0.8 4.1 5.4 <10 200 <4 45 <0.1 <10 <20 230 <0.2 49 <1 <1 <10 7/19/1994 11 0.8 4.4 5.8 <10 500 <2 54 0.1 <10 <20 330 <0.2 53 <1 <1 6.1 8/15/1995 13 0.8 5.3 6.5 <10 64 <1 59 <0.1 <10 <10 180 <0.2 80 <1 <1 9.5 6/19/1996 18 1 7.5 7.6 <10 140 <1 88 <0.1 <10 <10 220 <0.2 77 <1 <1 <5 6/16/1997 17 1.2 7.4 8.9 <10 170 <2 97 <0.5 <10 <25 480 <0.5 <10 <5 <5 <50 7/21/1998 7.85 0.687 3.25 5.52 <10 58 <2 <100 <0.5 <10 <20 333 <0.5 37.2 <2.5 <5 <25 6/20/1999 12.3 1.04 5.9 8.05 <10 160 <2 <100 <1 <0.1 <10 <20 171 <0.2 38.2 <5 <2.5 <3 <1 <1 <10 7/18/2000 5.94 0.694 3.24 6.24 <10 <2 <100 <20 348 <20 <2.5 <10 7/18/2000 9.85 1.19 3.05 10.3 <10 <2 <100 <20 78.6 54.4 <2.5 <10 6/19/2001 7.08 0.6 2.86 5.82 <10 <2 <100 <20 <100 <20 <2.5 <10 6/18/2002 6.60 0.589 2.54 5.7 <10 110 <2 37 <0.2 <0.2 <1 <20 135 0.02 <20 <1 <2.5 <1 <2 <0.2 <10 6/17/2003 5.86 1.02 2.95 5.99 <10 300 <2 39.9 <0.2 <0.2 <1 <20 330 <0.01 <20 <1 <2.5 <1 <2 <0.2 <10 5/18/2004 8.10 0.635 3.49 6.44 <10 210 <2 <100 <0.2 <0.2 <1 <20 126 0.01 <20 <1 <2.5 <1 <2 <0.2 <10 6/14/2005 10.20 0.562 4.20 7.00 <10 <2 <100 <20 121 <20 <2.5 <10 6/1/2006 9.89 0.791 4.08 7.11 <10 120 <2 <2 <2 <2 <20 328 <0.2 <20 <2 <2 <2.5 <2 <10 <1 <2 <10 6/19/2007 7.34 0.659 2.93 5.96 <10 88 2.12 37 <1 <0.5 <1 <20 601 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/4/2008 5.09 0.557 2.2 5.11 <10 1200 <2 35 <1 <0.5 <1 <20 626 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/17/2009 7.54 1.04 3.35 6.63 <10 1500 2.22 47 <1 <0.5 <1 <20 2820 <0.2 179 <2 <5 <2.5 <1 <5 <1 <3 17.5 6/9/2010 9.2 <1 3.90 6.90 <0.5 110 <1 44 <1 <0.5 <1 2.3 220 <0.2 7 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2011 14.1 1 6.16 9.04 <0.5 42.6 <1 60.4 <1 <0.5 <1 <2 545 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2012 24.9 <1 56.2 <1 <0.5 <1 <0.2 <2 <5 <1 <5 <1 <3 6/18/2013 7.35 0.562 2.91 5.69 6/17/2014 9.60 <1 4.35 6.89 <0.5 457 1.56 51.4 <1 <0.5 <1 <2 579 <0.2 23.7 <2 <5 <0.5 <1 <5 <1 <3 <20 7/15/2015 11.0 1.37 5.36 7.3 <0.5 3600 <1 85.3 <1 <0.5 3.83 <10 4660 <0.2 106 2.24 <5 1.71 <1 <5 <1 8.92 <20 7/12/2016 14.8 <1 6.3 8.32 <0.5 867 <1 76.8 <1 <0.5 <1 <2 885 <0.2 15.3 <2 <5 <0.5 <1 <5 <1 <3 <20 7/19/2017 7.53 <1 3.29 5.47 <0.5 736 <1 41 <1 <0.5 <1 <2 779 <0.2 15.0 <2 <5 <0.5 <1 <5 <1 <3 <20 8/6/2018 8.76 <1 3.68 5.94 <0.5 446 <1 44.2 <1 <0.5 <1 <2 292 <0.2 5.95 <2 <5 <0.5 <1 <5 <1 <3 <20 8/13/2019 6.82 <1.0 2.82 5.51 <0.5 345 <1 32.9 <1 <0.5 <1 <2 182 <0.2 4.17 <2 <5 <0.5 <1 <5 <1 <3 <20 7/15/2020 10.0 <1.0 4.25 6.80 <0.5 162 <1 51.3 <1 <0.5 <1 <2 126 <0.2 2.68 <2 <5 <0.5 <1 <5 <1 <3 <20 7/1/2021 8.78 <1.0 3.7 6.56 <0.5 151 <1 40.6 <1 <0.5 <1 <2 115 <0.2 4.37 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-02N SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DAT 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 1/26/2021 9.12 5460.58 11.9 6.41 60.0 0.024 < 0.10 < 0.020 < 0.010 0.419 0.42 91 4/13/2021 6.00 5463.70 13.6 6.47 57.0 0.019 0.095 < 0.020 < 0.010 0.154 0.249 88 7/1/2021 6.36 5463.34 14.6 6.28 53.6 0.018 0.014 < 0.020 < 0.010 0.080 0.094 74 10/28/2021 9.20 5460.50 14.1 6.58 59.7 0.024 < 0.050 < 0.020 < 0.010 0.223 0.214 93 Maximum 9.20 5463.7 14.6 6.58 60.0 0.024 < 0.100 < 0.020 < 0.010 0.42 0.42 93 Minimum 6.00 5460.5 11.9 6.28 53.6 0.018 0.014 < 0.020 < 0.010 0.080 0.094 74 Average 7.67 5462.0 13.6 6.44 57.6 0.021 0.065 < 0.020 < 0.010 0.219 0.244 87 #Tests 4 4 4 44 0 0 4 4 4 4 4 4 4 Site: ACMW-02N SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Fecal/ Fecal EC Chloride COD SO4 Color Coli E.coli Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 1/26/2021 138 2.03 2.73 < 1 < 1 4/13/2021 128 1.63 2.81 < 1 < 1 7/1/2021 112 1.44 2.59 < 1 < 1 10/28/2021 128 1.78 2.91 < 1 < 1 Maximum 138 2.03 2.91 < 1 < 1 Minimum 112 1.44 2.59 < 1 < 1 Average 127 1.72 2.76 < 1 < 1 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-02N SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 1989 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 89 7.1 5458.7 12.4 8.47 89.0 58 7.29 0.039 0.086 0.031 < 0.010 0.108 0.174 90 6.8 5458.6 12.1 8.99 106.0 60 17.98 0.035 0.097 0.021 < 0.010 0.082 0.189 91 7.0 5458.4 11.9 7.96 79.0 56 2.48 0.023 0.098 0.041 0.015 0.093 0.207 92 7.0 5458.4 11.6 7.40 71.0 48 0.57 0.020 0.099 0.037 0.012 0.091 0.202 93 6.3 5462.3 11.9 7.28 68.0 48 1.25 0.017 0.096 0.024 0.013 0.085 0.195 94 7.1 5458.3 11.7 6.92 70.0 53 1.01 0.022 0.092 0.025 0.013 0.071 0.174 95 6.2 5459.2 12.2 6.84 63.0 45 0.68 0.020 0.106 0.023 0.011 0.086 0.203 96 5.8 5459.6 12.8 6.64 64.0 48 1.50 0.016 0.102 0.028 0.011 0.093 0.206 97 6.8 5458.6 12.7 6.55 65.0 54 0.94 0.017 0.094 0.020 0.011 0.091 0.198 98 6.0 5459.4 12.0 6.48 63.0 48 1.75 0.020 0.114 < 0.020 < 0.010 0.113 0.239 99 6.2 5459.2 11.9 6.49 59.0 47 0.40 0.021 0.117 < 0.020 < 0.010 0.135 0.262 00 6.2 5459.2 12.3 6.71 59.0 45 0.71 0.017 0.122 0.025 < 0.010 0.091 0.167 01 7.0 5458.4 12.4 6.70 60.0 45 1.12 0.017 0.113 < 0.020 < 0.010 0.059 0.184 02 6.5 5458.9 11.8 6.67 58.0 42 1.31 0.016 0.116 < 0.010 0.084 0.209 03 6.8 5458.6 12.8 6.77 53.7 1.60 0.015 0.094 < 0.010 0.104 0.205 04 6.6 5458.8 11.4 6.86 54.6 29 0.81 0.018 0.128 < 0.020 < 0.010 0.057 0.195 05 7.0 5458.4 11.0 6.63 51.7 41 0.39 0.015 0.097 < 0.010 0.149 0.278 06 6.5 5458.9 12.0 6.67 53.5 41 0.99 0.017 0.240 < 0.010 0.135 0.385 07 7.5 5457.9 12.5 6.50 56.5 43 1.09 0.017 0.050 < 0.010 0.093 0.128 08 7.7 5457.7 12.2 6.60 56.0 39 1.16 0.024 0.060 < 0.018 0.150 0.193 09 8.0 5457.4 11.9 6.41 55.8 45 0.71 0.016 < 0.050 0.011 0.198 0.233 10 7.5 5457.9 11.6 6.51 54.0 44 0.97 0.022 0.056 < 0.010 0.194 0.232 11 8.6 5456.8 12.3 6.51 57.1 45 0.81 0.021 0.058 < 0.011 0.142 0.143 12 9.7 5460.0 12.2 6.64 62.9 0.026 < 0.047 0.023 < 0.010 0.148 0.202 13 10.4 5459.3 12.3 6.63 65.5 0.042 0.075 0.028 < 0.009 0.119 0.173 14 9.9 5459.8 12.6 6.61 60.2 0.024 0.055 0.026 < 0.011 0.235 0.246 15 11.3 5458.4 13.4 6.58 59.6 0.021 < 0.050 < 0.020 < 0.010 0.391 0.396 16 9.3 5460.4 13.6 6.59 62.6 0.026 0.093 < 0.020 < 0.015 1.938 1.959 17 6.6 5463.1 12.6 6.62 61.3 0.021 0.098 < 0.023 < 0.030 2.173 2.245 18 7.58 5462.1 13.1 6.49 62.8 0.027 0.080 < 0.023 < 0.015 1.137 1.116 19 7.48 5462.2 12.5 6.29 56.0 0.020 < 0.080 < 0.020 < 0.013 0.713 0.670 20 7.86 5461.8 13.5 6.34 57.5 0.022 < 0.145 < 0.020 < 0.010 0.448 0.515 21 7.67 5462.0 13.6 6.44 57.6 0.021 0.065 < 0.020 < 0.010 0.219 0.244 Maximum 11.3 5463.1 13.6 8.99 106.0 60 17.98 0.042 0.240 0.041 0.030 2.173 2.245 Minimum 5.8 5456.8 11.0 6.29 51.7 29 0.39 0.015 0.047 < 0.020 < 0.009 0.057 0.128 Average 7.5 5459.4 12.3 6.81 62.8 47 2.07 0.022 0.093 0.024 0.012 0.304 0.381 #Tests 33 33 33 33 33 22 23 33 33 24 33 33 33 Site: ACMW-02N SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY Dp From 1989 To: 2021 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 89 130 231 5.9 5 9.73 < 2 < 2 90 113 195 4.9 < 5 6.56 5 < 2 < 2 91 113 165 4.8 < 5 5.40 < 5 < 2 < 2 92 99 157 3.5 < 5 5.09 < 5 < 2 < 2 93 100 145 2.4 8 4.94 < 5 3 < 2 < 2 94 100 150 2.9 < 5 4.72 < 4 < 2 < 2 95 90 135 2.3 5 4.29 5 2 2 96 95 136 2.5 2 3.11 5 1 1 97 97 147 6.8 2 4.83 5 1 1 98 95 141 3.5 < 5 3.32 < 5 1.4 < 1.1 99 90 134 3.2 < 5 2.77 < 5 3.6 2.4 2.0 00 90 129 2.8 < 5 3.15 < 5 < 1.1 < 1.1 01 87 128 3.0 9 3.01 10 < 1.1 < 1.1 02 85 122 2.6 < 5 2.56 5 < 1.1 < 1.1 03 85 118 3.0 < 5 2.38 < 5 < 1.1 < 1.1 04 82 114 2.7 < 5 2.29 6 < 1.1 < 1.1 05 79 115 2.9 < 5 2.29 < 5 < 1.1 < 1.1 06 85 120 2.8 6 2.30 < 1.1 < 1.1 07 84 124 2.9 < 5 2.24 < 1.1 < 1.1 08 85 119 2.9 < 5 2.25 < 5 < 1.1 < 1.1 09 84 122 2.6 < 5 2.18 < 1.1 < 1.1 10 82 117 2.1 5 2.26 < 1.1 < 1.1 11 88 121 2.2 5 2.36 < 1.1 < 1.1 12 97 133 2.9 2.71 < 1.1 < 1.1 13 99 140 3.1 2.86 < 1.2 < 1.1 14 93 129 2.7 2.75 2.9 < 1.1 15 95 137 2.5 2.81 < 1.0 < 1.0 16 102 152 3.1 3.75 < 1.0 < 1.0 17 105 151 1.8 3.07 < 1.0 < 1.0 18 100 141 1.65 3.00 2.6 < 1.0 19 86 126 2.07 3.19 < 1.0 < 1.0 20 91 126 1.90 2.74 < 1.0 < 1.0 21 87 127 1.72 2.76 < 1.0 < 1.0 Maximum 130 231 6.8 9 9.73 10 3.6 2.4 2.0 Minimum 79 114 1.7 2 2.18 < 4 < 1.0 < 1.0 < 2.0 Average 94 138 3.0 5 3.44 5 1.5 1.3 2.0 #Tests 33 33 33 23 33 17 33 33 2 Site ACMW-02N Nitrate-Nitrogen and Water Level Chlorides 5 5470 50 4 5465 40 3 5460 m 30 J Ir J rn 2 Id J rn 5455 20 1 0 5450 10 m v� n rn m �n r rn m 12 n rn -1 5445 p ao m rn rn rn rn o 0 0 0 0 � N Nitrate f Water Level Linear(Nitrate) Chloride Linear(Chloride) Total Dissolved Solids JDS) Total Phosphorus 500 - 0.20 400 0.15 300 rn rn 0.10 E E 200 100 0.05 0 0.00 �m �TDS Linear(TDS) ---*.--TotalP Llnear(TotaIP) Annual Metal Report ACMW-02N Access Gate Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb sb se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 11/2/1988 11 3.5 5.1 28 <10 4200 <4 76 <0.1 <10 <20 3800 <0.2 550 7 <50 3 <1 16 11/28/1989 18.1 1.7 4.6 9.2 <10 <100 <10 <100 <1 <10 <50 580 <1 530 <10 <5 <50 8/1/1990 28 3.2 2.7 15 <10 180 <4 120 <0.1 <10 <20 280 <0.2 230 <1 <1 <10 8/21/1991 30 2.8 4.3 12 <10 89 <4 140 <0.1 <10 <20 180 <0.2 260 <1 <1 <10 7/21/1992 14 1.8 3.1 14 <10 <50 <4 76 <0.1 <10 <20 40 <0.2 120 <1 <1 <10 7/19/1994 15 1.3 3.6 13 <10 180 <2 61 <0.1 <10 <20 140 <0.2 110 <1 <1 <5 8/15/1995 13 1.4 3 12 <10 <50 <1 55 <0.1 <10 <10 <30 <0.2 15 <1 <1 <5 6/19/1996 14 1.4 3.5 12 <10 120 <1 58 <0.1 <10 <10 <30 <0.2 66 <1 <1 <5 6/16/1997 15 1.5 3.8 12 <10 100 <2 <50 <0.5 <10 <25 74 <0.5 72 <5 <5 <50 7/21/1998 14.5 1.21 3.28 10.7 <10 119 <2 <100 <0.5 <10 <20 56.4 <0.5 65.8 <2.5 <5 <25 6/20/1999 10.9 1.33 3.17 10.9 <10 96 <2 <100 <1 <0.1 <10 <20 <100 <0.2 59.4 <5 <2.5 <3 <1 <1 <10 7/18/2000 6.01 3.07 1.61 24.9 <10 <2 <100 <20 92.8 <20 <2.5 <10 6/19/2001 11.6 1.22 3.56 9.99 <10 <2 <100 <20 <100 114 <2.5 <10 6/18/2002 11.0 1.38 2.69 10.2 <10 50 <2 43 <0.2 <0.2 <1 <20 <100 0.02 38.8 <1 <2.5 <1 <2 <0.2 <10 6/17/2003 9.37 1.23 3.01 9.11 <10 100 <2 41.4 <0.2 <0.2 <1 <20 <100 <0.01 56.1 <1 <2.5 <1 <2 <0.2 <10 5/18/2004 10.9 1.05 2.89 8.77 <10 30 <2 <100 <0.2 <0.2 <1 <20 <100 0.02 28.6 <1 <2.5 <1 <2 <0.2 <10 6/14/2005 10.1 0.968 2.7 8.18 <10 <2 <100 <20 <100 <20 <2.5 <10 6/1/2006 9.91 1.12 2.85 8.77 <10 60 <2 <2 <2 <2 <20 128 <0.2 62.9 <2 <2 <2.5 <2 <10 <1 <2 <10 6/19/2007 12.4 1.14 3.18 8.38 <10 49 <2 38 <1 <0.5 <1 <20 <50 <0.2 34.5 <2 <5 <2.5 <1 <5 <1 <3 <10 6/4/2008 12.3 1.19 3.13 8.73 <10 100 <2 48 <1 1.5 6.8 <20 86.5 <0.2 91.2 6.5 <5 <2.5 3.5 <5 1.3 6.6 <10 6/17/2009 12.5 0.991 3.16 8.5 12.3 58 <2 41 <1 <0.5 <1 <20 <50 <0.2 43 <2 <5 <2.5 <1 <5 <1 <3 <10 6/9/2010 12.0 1.10 3.3 7.40 <0.5 260 <1 39 <1 <0.5 <1 400 33 <0.2 65 <2 <5 <0.5 <1 <5 <1 <3 28 6/14/2011 12.0 1.13 3.48 9.17 <0.5 28.6 <1 37.6 <1 <0.5 <1 <2 <20 <0.2 27.9 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2012 <20 <1 49.3 <1 <0.1 <1 <0.2 <2 <5 <1 <5 <1 <3 6/18/2013 13.7 1.06 3.3 9.66 6/17/2014 13.3 1.23 3.54 8.76 <0.5 33.5 <1 38.9 <1 <0.5 <1 <2 <20 <0.2 8.63 <2 <5 <0.5 <1 <5 <1 <3 <20 7/15/2015 15.7 1.03 3.59 9.78 <0.5 87.6 <1 39.9 <1 <0.5 <1 <10 <20 <0.2 17.6 <2 <5 <0.5 <1 <5 <1 <3 <20 7/12/2016 13.0 1.02 3.68 7.91 <0.5 105 <1 41 <1 <0.5 <1 <2 19.8 <0.2 25 <2 <5 <0.5 <1 <5 <1 <3 <20 7/19/2017 14.6 1.04 4.42 7.66 <0.5 481 <1 40.9 <1 <0.5 <1 <2 46.7 <0.2 72.8 <2 <5 <0.5 <1 <5 <1 <3 <20 8/6/2018 15.1 <1 6.28 7.76 <0.5 1170 <1 47.3 <1 <0.5 <1 <2 70.4 <0.2 117 <2 <5 <0.5 <1 <5 <1 <3 <20 8/13/2019 12.0 <1.0 4.75 7.45 <0.5 673 <1 44.3 <1 <0.5 <1 <2 47.9 <0.2 119 <2 <5 <0.5 <1 <5 <1 <3 <20 7/15/2020 12.6 <1.0 4.36 7.63 <0.5 344 <1 48.5 <1 <0.5 <1 <2 <20 <0.2 47.5 <2 <5 <0.5 <1 <5 <1 <3 <20 7/1/2021 11.4 <1.0 3.54 7.00 <0.5 116 <1 41.9 <1 <0.5 <1 <2 16.3 <0.2 24.9 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-02S SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DAT/ 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 1/13/2021 10.73 5460.87 13.9 6.31 47.4 0.016 < 0.10 < 0.020 < 0.010 < 0.010 < 0.10 72 4/13/2021 3.72 5467.88 11.7 6.26 57.7 0.018 0.110 < 0.020 < 0.010 < 0.010 0.110 84 7/1/2021 4.52 5467.08 14.4 6.36 53.8 0.019 0.075 < 0.020 < 0.010 < 0.010 0.075 80 10/28/2021 10.75 5460.85 16.2 6.21 51.7 0.026 0.072 < 0.020 < 0.010 < 0.010 0.072 81 Maximum 10.75 5467.9 16.2 6.36 57.7 0.026 0.110 < 0.020 < 0.010 < 0.010 0.110 84 Minimum 3.72 5460.9 11.7 6.21 47.4 0.016 0.072 < 0.020 < 0.010 < 0.010 0.072 72 Average 7.43 5464.2 14.1 6.29 52.7 0.020 0.089 < 0.020 < 0.010 < 0.010 0.089 79 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-02S SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Fecal/ Fecal EC Chloride COD SO4 Color Coli E.coli Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 1/13/2021 103 1.52 1.51 < 1 < 1 4/13/2021 125 1.39 3.17 8.6 < 1 7/1/2021 117 1.19 1.61 20.1 1 10/28/2021 108 1.51 1.41 12.2 < 1 Maximum 125 1.52 3.17 20.1 1 Minimum 103 1.19 1.41 < 1 < 1 Average 113 1.40 1.93 10.5 1 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-02S SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 1989 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 89 7.1 5460.5 11.7 6.70 58.0 38 5.11 0.028 0.088 0.030 < 0.015 0.193 0.267 90 7.0 5460.2 11.8 7.07 55.0 38 2.06 0.021 0.094 0.023 < 0.010 0.155 0.259 91 7.0 5460.2 12.2 7.01 56.0 41 0.57 0.020 0.098 0.036 0.010 0.219 0.328 92 6.9 5460.3 11.6 6.76 49.0 37 0.76 0.022 0.094 0.029 0.010 0.093 0.197 93 6.6 5460.5 11.4 6.86 57.0 42 1.83 0.022 0.098 0.024 0.011 0.079 0.188 94 7.4 5459.8 12.5 6.84 54.0 42 2.92 0.030 0.114 0.027 < 0.010 0.087 0.210 95 6.8 5460.5 12.0 6.57 51.0 36 0.98 0.030 0.118 0.054 0.010 0.101 0.228 96 6.0 5461.2 12.6 6.37 54.0 42 1.35 0.036 0.137 0.029 0.011 0.081 0.229 97 7.4 5459.8 12.5 6.50 50.0 40 1.25 0.018 0.098 0.021 0.011 0.103 0.213 98 6.3 5460.9 12.0 6.28 50.0 36 0.83 0.021 0.128 < 0.021 < 0.010 0.138 0.277 99 6.6 5460.6 12.3 6.34 47.0 35 0.62 0.017 0.141 < 0.020 < 0.010 0.042 0.193 00 6.5 5460.7 12.3 6.62 46.0 41 0.68 0.016 0.118 < 0.024 < 0.010 0.035 0.110 01 7.7 5459.5 12.5 6.57 47.0 38 1.28 0.014 0.111 0.021 < 0.010 0.018 0.145 02 6.6 5460.6 12.4 6.45 48.0 38 0.99 0.014 0.149 < 0.010 0.186 0.370 03 6.9 5460.3 12.3 6.66 43.1 2.35 0.015 0.103 < 0.010 0.077 0.153 04 6.6 5460.6 11.3 6.52 46.9 28 0.61 0.017 0.157 0.020 < 0.010 0.139 0.347 05 7.3 5459.9 10.7 6.44 46.8 38 0.87 0.017 0.104 < 0.018 0.119 0.210 06 6.9 5460.3 12.5 6.34 47.2 36 1.82 0.016 0.309 < 0.010 0.123 0.444 07 8.1 5459.1 12.7 6.22 44.3 36 0.95 0.016 0.055 < 0.010 0.231 0.268 08 8.1 5459.1 11.9 6.34 46.0 39 1.02 0.018 0.058 < 0.010 0.341 0.375 09 8.4 5458.8 11.8 6.16 47.7 41 0.95 0.015 0.110 < 0.010 0.155 0.220 10 7.4 5459.8 11.7 6.33 45.4 37 0.78 0.021 0.078 < 0.010 0.096 0.145 11 9.6 5457.6 12.2 6.48 45.7 38 0.47 0.018 0.056 < 0.010 0.078 0.080 12 11.5 5460.1 12.2 6.54 46.4 0.021 0.059 0.023 < 0.010 0.201 0.263 13 12.4 5459.2 12.4 6.54 50.9 0.032 0.080 0.028 < 0.012 0.752 0.863 14 10.6 5461.0 13.0 6.29 38.9 0.024 0.058 0.025 < 0.012 1.565 1.185 15 12.4 5459.2 13.8 6.15 42.0 0.019 0.108 < 0.020 < 0.020 3.038 3.093 16 8.91 5462.7 13.9 6.18 41.5 0.025 0.073 < 0.020 < 0.038 2.333 2.210 17 6.30 5465.3 11.9 6.23 45.3 0.019 0.103 0.023 < 0.023 0.778 0.850 18 8.46 5466.0 14.1 6.19 56.0 0.027 0.086 0.022 < 0.010 0.265 0.313 19 7.92 5463.7 12.8 6.07 54.6 0.017 0.100 < 0.020 < 0.013 0.405 0.501 20 8.81 5462.8 13.9 6.13 56.9 0.018 0.125 < 0.020 < 0.010 < 0.010 0.125 21 7.43 5464.2 14.1 6.29 52.7 0.020 0.089 < 0.020 < 0.010 < 0.010 0.089 Maximum 12.4 5466.0 14.1 7.07 58.0 42 5.11 0.036 0.309 0.054 0.038 3.038 3.093 Minimum 6.0 5457.6 10.7 6.07 38.9 28 0.47 0.014 0.055 < 0.020 < 0.010 < 0.010 0.080 Average 7.9 5460.8 12.4 6.46 49.1 38 1.35 0.021 0.106 0.025 0.012 0.371 0.453 #Tests 33 33 33 33 33 22 23 33 33 24 33 33 33 Site: ACMW-02S SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2021 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 89 85 133 1.8 5 4.78 4 < 2 90 80 123 1.5 5 3.80 5 < 2 < 2 91 84 121 1.8 < 5 5.34 < 5 < 2 < 2 92 77 103 1.6 6 3.70 < 5 < 2 < 2 93 91 118 1.4 < 5 3.58 < 5 6 < 2 < 2 94 83 118 1.4 < 5 3.88 6 2 < 2 95 78 111 1.9 5 3.35 5 2 2 96 80 116 1.7 2 2.08 5 1.5 1.0 97 78 107 1.8 4 2.96 5 3.7 1.0 98 74 108 2.0 < 5 2.71 < 5 5.3 < 1.1 99 70 101 1.5 < 5 2.52 < 5 3.7 < 1.1 00 72 97 1.6 < 5 1.41 < 5 2.5 < 1.1 01 69 97 1.7 7 1.38 8 1.3 < 1.1 02 75 103 2.5 < 5 1.51 5 4.0 1.2 03 70 96 2.3 < 5 1.49 < 5 1.4 < 1.1 04 76 101 2.7 < 5 1.41 7 3.1 < 1.1 05 73 101 2.4 < 5 1.85 5 < 1.1 < 1.1 06 77 105 2.2 < 5 1.38 < 1.2 < 1.1 07 73 102 2.6 6 1.75 2.9 1.2 08 75 101 2.3 < 5 2.22 < 5 3.5 < 1.1 09 74 108 1.9 6 2.53 < 4.8 < 1.1 10 72 106 1.6 6 2.56 < 9.1 < 1.1 11 76 100 1.4 7 1.96 2.3 < 1.1 12 75 99 1.4 2.52 < 1.1 < 1.1 13 88 119 2.5 4.76 < 1.3 < 1.1 14 82 101 1.9 4.83 7.7 1.2 15 89 126 1.7 4.56 3.2 < 1.0 16 70 112 1.7 5.86 60.2 < 1.0 17 81 109 1.7 4.78 5.4 < 1.0 18 87 117 1.74 3.17 22.8 2.6 19 83 122 2.0 2.75 2.6 1.0 20 88 122 1.7 2.09 31.7 1.0 21 79 113 1.4 1.93 10.5 1.0 Maximum 91 133 2.7 7 5.86 8 60.2 2.6 < 2 Minimum 69 96 1.4 2 1.38 < 5 < 1.1 < 1.0 < 2 Average 78 110 1.9 5 2.95 5 6.6 1.3 < 2 #Tests 33 33 33 23 33 17 33 33 1 Site ACMW-02S Nitrate-Nitrogen and Water Level Chlorides 5 5470 50 4 5465 40 3 � 5460 J 30 2 E 5455 20 1 � 0 5450 10 0 ♦ • • •ter--• • ' • • • • • -�--ram-- • • � • - •� -1 5445 ro m rn rn rn rn o 0 0 0 0 ° N Nitrate f Water Level Linear(Nitrate) Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 — 0.20 400 0.15 300 J J £ 0.10 200 0.05 100 0 0.00 _ cro rn TDS Linear(TDS) --*.--Total P Linear(Total P) Annual Metal Report ACMW-02S Access Gate Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 10/31/1988 9.7 2.1 3 9.9 <10 200 <4 30 <0.1 <10 <20 260 <0.2 190 6 <50 <1 <1 <10 11/28/1989 10.7 1.3 3.8 16 <10 <100 <10 <100 <1 <10 <50 <100 <1 <10 <10 <5 <50 8/1/1990 11 1.9 2.8 9.2 <10 <50 <4 57 <0.1 <10 <20 <30 <0.2 28 <1 <1 <10 8/21/1991 11 1.9 3 7.1 <10 <50 <4 53 <0.1 <10 <20 <30 <0.2 10 <1 <1 <10 7/21/1992 12 1.8 2.8 8.4 <10 <50 <4 55 <0.3 <10 <20 <0.2 <1 <1 <10 7/19/1994 13 1.8 3.2 7.1 <10 310 <2 69 0.1 <10 <20 320 <0.2 76 <1 <1 6 8/15/1995 12 1.8 2.9 6.8 <10 <50 <1 59 0.2 <10 <10 <30 <0.2 <5 <1 <1 <5 6/19/1996 12 1.8 2.8 6 <10 78 <1 54 <0.1 <10 <10 <30 <0.2 <5 <1 <1 <5 6/16/1997 9.7 1.8 2.4 6.5 <10 75 <2 <50 7.4 <10 <25 <50 <0.5 <10 <5 <5 <50 7/21/1998 11.1 1.77 2.36 6.31 <10 65 <2 <100 <0.5 <10 <20 63.9 <0.5 <20 <2.5 <5 <25 6/20/1999 7.93 1.70 3.43 5.73 <10 <50 <2 <100 <1 <0.1 <10 <20 <100 <0.2 <20 <5 <2.5 <3 <1 <1 <10 7/18/2000 8.28 1.76 2.37 6.06 <10 <2 <100 <20 89.6 <20 <2.5 <10 7/18/2000 45.6 8.04 16.2 44.9 <10 4.88 314 <20 1295 253 <2.5 <10 6/19/2001 9.14 1.61 2.06 5.15 <10 <2 <100 <20 <100 <20 <2.5 <10 6/18/2002 8.88 1.68 2.03 5.17 <10 20 <2 44 <0.2 <0.2 <1 <20 <100 0.02 <20 <1 <2.5 <1 <2 <0.2 <10 6/17/2003 9.58 1.44 2.53 5.57 <10 <10 <2 51.7 <0.2 <0.2 <1 <20 <100 <0.01 <20 <1 <2.5 <1 <2 <0.2 <10 5/18/2004 8.71 1.66 2.15 4.99 <10 20 <2 <100 <0.2 <0.2 <1 <20 <100 <0.01 <20 <1 <2.5 <1 <2 <0.2 <10 6/14/2005 9.02 1.40 2.02 4.97 <10 <2 <100 <20 <100 <20 <2.5 <10 6/1/2006 9.11 1.72 2.23 5.54 <10 50 <2 <2 <2 <2 <20 163 <0.2 <20 <2 <2 <2.5 <2 <10 <1 <2 <10 6/19/2007 10.1 1.73 2.2 5.54 <10 62 <2 46 <1 <0.5 <1 <20 112 <0.2 <2 <2 <5 <2.5 <1 <5 <1 <3 <10 6/4/2008 9.61 1.79 2.15 5.20 <10 78 <2 49 <1 <0.5 <1 <20 249 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/17/2009 10.5 1.75 2.42 5.67 15.4 39 <2 51 <1 <0.5 <1 <20 92.6 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 12.8 6/9/2010 10.0 1.70 2.4 5.20 <0.5 91 <1 46 <1 <0.5 <1 <2 62 <0.2 3 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2011 9.56 1.71 2.4 5.19 <0.5 43.9 <1 41.9 <1 <0.5 <1 <2 358 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2012 40.9 <1 43.2 <1 <0.5 <1 <0.2 <2 <5 <1 <5 <3 <3 6/18/2013 12.6 1.96 2.77 5.32 6/17/2014 7.08 1.63 1.80 4.39 <0.5 315 1.46 34.6 <1 <0.5 <1 <2 1080 <0.2 2.47 <2 <5 <0.5 <1 <5 <1 <3 <20 7/15/2015 12.1 1.70 2.67 5.10 <0.5 <20 <1 <2 <1 <0.5 <1 <10 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/12/2016 11.7 1.87 2.73 5.58 <0.5 279 <1 55.7 <1 <0.5 <1 <2 189 <0.2 2.14 <2 <5 1.66 <1 <5 <1 <3 <20 7/19/2017 11.2 1.83 2.56 6.18 <0.5 37 <1 49.9 <1 <0.5 <1 <2 36.2 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/6/2018 11.6 1.88 2.55 6.63 <0.5 22.5 <1 56.4 <1 <0.5 <1 <2 58.6 <0.2 5.74 <2 <5 <0.5 <1 <5 <1 <3 <20 8/13/2019 12.8 1.92 2.78 6.58 <0.5 <20 <1 62.6 <1 <0.5 <1 <2 <20 <0.2 3.32 <2 <5 <0.5 <1 <5 <1 <3 <20 7/15/2020 12.7 1.66 2.78 5.49 <0.5 <20 <1 67.2 <1 <0.5 <1 <2 <20 <0.20 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/1/2021 12.4 1.58 2.69 5.5 <0.5 <20 <1 64 <1 <0.5 <1 <2 14.9 <0.20 3.21 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-04W SOUTH TAHOE PUBLIC UTILITY DISTRICT ,LPINE COUNTY GROUNDWATER QUALITY DA1 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 01/13/21 22.04 4897.85 12.8 6.08 43.4 0.016 0.17 < 0.020 < 0.020 1.21 1.4 118 04/13/21 18.08 4901.81 12.3 6.38 45.3 0.021 < 0.050 < 0.020 < 0.020 1.75 1.68 119 07/01/21 11.81 4908.08 12.3 6.31 37.6 0.019 0.065 < 0.020 < 0.030 1.82 1.88 130 10/28/21 17.86 4902.03 12.2 6.41 39.2 0.020 0.13 < 0.020 < 0.020 1.81 1.94 131 Maximum 22.04 4908.08 12.8 6.41 45.3 0.021 0.17 < 0.020 < 0.030 1.82 1.94 131 Minimum 11.81 4897.85 12.2 6.08 37.6 0.016 < 0.05 < 0.020 < 0.020 1.21 1.40 118 Average 17.45 4902.44 12.4 6.30 41.4 0.019 0.10 < 0.020 < 0.023 1.65 1.73 125 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-04W SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Fecal/ Fecal EC Chloride COD SO4 Color Coli E.coli Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 01/13/21 178 14.4 13.0 11 < 1 04/13/21 170 11.3 13.1 < 1 < 1 07/01/21 190 21.4 10.0 210 < 1 10/28/21 187 20.1 10.0 17.5 < 1 Maximum 190 21.40 13.1 210.0 < 1.0 Minimum 170 11.30 10.0 < 1 < 1.0 Average 181 16.80 11.5 59.9 < 1.0 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-04W SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 1989 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 89 14.2 4901.7 11.3 6.10 34.0 77 61.58 0.163 0.127 0.028 < 0.010 0.82 0.958 90 14.0 4902.7 12.4 6.25 33.0 97 4.90 0.034 0.104 0.020 < 0.010 0.99 1.100 91 15.1 4900.8 12.3 6.37 33.0 98 7.20 0.028 0.133 0.053 0.010 1.51 1.652 92 15.4 4900.5 11.9 6.24 34.0 96 3.10 0.038 0.118 0.026 0.012 1.74 1.868 93 12.2 4903.7 11.8 6.18 38.0 83 4.75 0.028 0.111 0.025 0.010 2.22 2.337 94 15.2 4900.7 12.2 6.23 40.0 76 1.27 0.069 0.121 0.033 0.011 3.55 3.676 95 12.9 4903.0 12.3 6.20 39.0 66 0.69 0.029 0.165 0.029 0.010 4.42 4.593 96 13.2 4902.7 12.5 6.11 43.0 62 3.08 0.028 0.181 0.021 0.013 3.03 3.219 97 11.9 4904.0 12.0 6.14 49.0 62 1.88 0.026 0.108 0.020 0.011 2.51 2.634 98 13.2 4902.7 12.0 5.82 53.0 52 5.30 0.027 0.203 < 0.024 < 0.010 3.20 3.416 99 13.4 4902.5 11.8 5.80 53.0 49 3.87 0.031 0.238 < 0.021 < 0.010 2.61 2.860 00 14.0 4901.9 11.6 6.23 52.0 47 1.75 0.018 0.118 0.021 < 0.011 2.65 2.721 01 14.2 4901.7 11.8 6.26 49.0 45 8.19 0.037 0.143 < 0.020 < 0.019 2.41 2.640 02 13.9 4902.0 12.0 6.15 46.0 47 4.46 0.024 0.343 < 0.019 2.29 2.651 03 13.8 4902.1 12.4 6.55 43.0 1.64 0.014 0.086 < 0.020 1.79 1.880 04 15.0 4900.9 11.3 6.21 44.2 29 0.33 0.019 0.133 < 0.020 < 0.020 1.70 1.862 05 14.7 4901.2 11.7 6.30 42.8 43 1.60 0.028 0.155 < 0.019 1.96 2.135 06 13.4 4902.5 12.2 6.15 39.6 42 1.55 0.015 0.138 < 0.049 5.31 5.086 07 15.7 4900.2 13.0 6.14 38.6 41 0.91 0.015 0.064 < 0.083 7.46 7.570 08 16.4 4899.5 12.2 6.24 42.8 33 3.90 0.021 0.057 < 0.064 5.49 5.573 09 15.1 4900.8 11.9 5.97 44.5 47 1.43 0.015 < 0.050 < 0.051 4.43 4.505 10 14.3 4901.6 12.6 6.10 48.6 43 1.07 0.020 < 0.050 < 0.040 3.57 3.636 11 12.9 4903.0 11.5 6.08 48.7 38 0.81 0.022 < 0.066 < 0.028 2.40 2.364 12 15.3 4904.6 12.3 5.99 47.4 0.021 < 0.093 0.023 < 0.028 2.34 2.508 13 15.3 4904.6 12.4 6.02 42.9 0.043 0.113 0.029 < 0.023 2.53 2.557 14 15.0 4904.9 11.8 6.18 40.1 0.018 0.100 0.029 < 0.019 1.90 1.920 15 17.2 4902.7 12.5 6.05 39.6 0.017 0.053 < 0.020 < 0.020 1.80 1.830 16 17.0 4902.9 12.7 6.04 40.0 0.022 0.105 < 0.020 < 0.035 1.72 1.813 17 12.5 4907.4 12.4 6.21 42.2 0.028 0.110 0.030 < 0.028 1.59 1.678 18 14.7 4905.2 12.4 6.19 45.5 0.031 0.083 0.024 < 0.015 1.94 1.88 19 13.3 4906.6 11.8 6.00 43.9 0.016 < 0.080 < 0.020 < 0.015 1.62 1.600 20 15.4 4904.5 12.6 6.25 41.8 0.018 0.158 < 0.020 < 0.015 1.44 1.505 21 17.4 4902.4 12.4 6.30 41.4 0.019 0.104 < 0.020 < 0.023 1.65 1.725 Maximum 17.4 4907.4 13.0 6.55 53.0 98 61.58 0.163 0.343 0.053 0.083 7.46 7.570 Minimum 11.9 4899.5 11.3 5.80 33.0 29 0.33 0.014 < 0.050 < 0.020 < 0.010 0.82 0.958 Average 14.5 4902.7 12.1 6.15 42.8 58 5.45 0.030 0.122 0.025 0.023 2.62 2.726 #Tests 33 33 33 33 33 22 23 33 33 24 33 33 33 Site: ACMW-04W SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2021 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 89 244 310 52.2 5 18.65 9 < 2 90 230 329 53.1 6 29.30 < 5 2 < 2 91 222 313 50.5 < 5 31.42 < 5 2 < 2 92 222 311 49.5 7 32.04 < 5 4 < 2 93 204 301 37.6 6 29.75 < 5 7 < 2 < 2 94 181 271 29.3 < 5 25.85 7 12 < 2 95 176 268 29.9 5 22.95 5 6 2 96 163 240 24.4 3 19.95 5 18.1 1.1 97 151 220 20.1 2 15.30 5 7.8 3.6 98 144 211 14.3 < 5 13.95 < 5 15.1 < 1.1 99 135 199 12.4 6 10.45 < 5 7.4 < 1.1 00 134 192 13.8 5 8.84 < 5 3.9 1.1 01 131 192 18.3 6 7.50 < 5 1.2 < 1.1 02 139 207 25.4 16 6.93 10 5.1 < 1.1 03 136 199 25.1 < 5 8.60 5 9.3 < 3.1 04 134 193 22.1 < 5 9.62 6 3.9 < 1.1 05 135 183 23.1 < 5 9.94 < 5 1.8 < 1.1 06 143 212 19.0 < 5 9.75 < 1.1 < 1.1 07 146 213 12.6 < 5 10.20 15.7 < 2.9 08 137 181 13.5 < 5 9.70 5 7.4 < 1.1 09 147 233 22.9 6 8.46 1.5 < 1.1 10 145 215 21.3 < 5 7.96 6.3 < 1.1 11 138 196 17.0 < 5 7.99 8.5 1.6 12 129 180 12.7 9.77 11.2 < 1.1 13 132 183 13.9 13.42 7.2 < 1.1 14 129 185 14.2 17.46 5.0 < 1.1 15 138 202 16.4 20.05 78.3 < 1.0 16 142 215 21.2 18.25 6.8 < 1.0 17 140 211 20.4 16.15 362.0 < 1.0 18 132 189 14.1 18.85 10.7 < 1.0 19 123 183 14.7 15.43 4.1 < 1.0 20 126 180 16.6 14.23 18.3 < 1.0 21 125 181 16.8 11.53 59.9 < 1.0 Maximum 244 329 53.1 16 32.04 10 362.0 3.6 < 2 Minimum 123 180 12.4 2 6.93 < 5 1.1 < 1.0 < 2 Average 153 221 23.3 6 15.46 5 21.8 1.5 < 2 #Tests 33 33 33 23 33 17 33 33 1 Site AC MW-04W Nitrate-Nitrogen and Water Level Chlorides 10 4910 100 9 4908 so 8 4906 80 7 4904 70 6 164 4902 60 rnC 5 4900 3 50 C L E 4 4898 2 40 3 4896 so 2 4894 20 1 4892 o 0 4890 m M n 0 CO m . m O O O O O . N p� m N n M In r m M In n Nitrate f Water Level Linear(Nitrate) Chio,iae Linear(Chionae) Total Dissolved Solids (TDS) Total Phosphorus 500 — 0.50 400 0.40 300 0.30 J J 200 0.20 100 0.10 0 0.00 TDS Linear(TDS) Total P Linear(Total P) Annual Metal Report ACM W-04W Gansberg Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 10/31/1988 20 3.8 5.4 12 <10 1300 <4 120 <0.1 <10 <20 790 <0.2 430 <5 <50 1 <1 <10 11/28/1989 31.4 4 7.7 40.6 <10 130 <10 220 <1 <10 <50 140 <1 17 <10 <5 <50 8/1/1990 27 4.2 6 16 <10 170 <4 180 <0.1 <10 <20 120 <0.2 13 <1 <1 <10 8/21/1991 25 4.2 6.3 15 <10 <50 <4 160 <0.1 <10 <20 <30 <0.2 <10 <1 <1 <10 7/21/1992 30 4.4 6.5 20 <10 230 <4 190 0.1 <10 <20 340 <0.2 14 <1 <1 <10 7/12/1994 22 3.7 4.8 20 <10 350 <2 140 <0.1 <10 <20 290 <0.2 6.5 <1 <1 <5 8/15/1995 21 3.8 4.7 20 <10 51 <1 150 0.1 <10 <10 <30 <0.2 <5 <1 <1 <5 6/19/1996 19 3.5 4.3 19 <10 95 1 140 <0.1 <10 <10 <30 <0.2 <5 <1 <1 <5 6/16/1997 17 4.2 4 20 <10 67 <2 120 <0.5 <10 <25 83 <0.5 <10 <5 <5 <50 7/21/1998 16.1 3.35 3.36 19.4 <10 133 <2 <100 <0.5 <10 <20 73.9 <0.5 <20 <2.5 <5 <25 6/20/1999 11.4 3.16 2.02 17.7 <10 82 <2 <100 <1 <0.1 <10 <20 <100 <0.2 <20 <5 <2.5 <3 2 <1 10.2 7/18/2000 9.41 3.03 2.73 17.9 <10 <2 122 <20 119 <20 <2.5 <10 6/19/2001 12.9 3.13 2.82 19.7 <10 <2 <100 <20 <100 <20 <2.5 <10 6/18/2002 13.7 3.6 2.92 22.4 <10 <10 <2 98 <0.2 <0.2 <1 <20 <100 0.02 <20 <1 <2.5 <1 <2 <0.2 <10 6/17/2003 11.5 2.84 2.83 21.8 <10 <10 <2 106 <0.2 <0.2 <1 <20 <100 <0.01 <20 <1 <2.5 <1 <2 <0.2 <10 5/18/2004 10.9 2.95 2.6 20.0 <10 <10 <2 <100 <0.2 <0.2 <1 <20 <100 <0.01 <20 <1 <2.5 <1 <2 <0.2 <10 6/14/2005 11.0 2.87 2.55 19.3 <10 <2 <100 <20 <100 <20 <2.5 <10 6/1/2006 12.5 3 2.47 19.7 <10 <50 <2 <2 27 <2 <20 <100 <0.2 <20 <2 <2 <2.5 <2 <10 <1 <2 10.2 6/19/2007 12.1 3.11 2.55 22.8 <10 21 <2 85 <1 <0.5 <1 <20 <50 <0.2 <20 <2 <5 <2.5 <2 <5 <1 <3 <10 6/4/2008 10.7 3.15 2.25 20.8 <10 42 <2 110 <1 <0.5 <1 <20 66 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/18/2009 12.9 3.37 2.96 23.1 13.7 33 <2 100 <1 <0.5 <1 <20 94.2 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 15.1 6/9/2010 14.0 3.10 3.10 24.0 <0.5 <20 <1 100 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2011 12.4 3.14 2.98 25.2 <0.5 45.4 <1 92.8 <1 <0.5 <1 <2 464 <0.2 2.01 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2012 <20 <1 81.5 <1 <0.5 <1 <0.2 <2 <5 <1 <5 <1 <3 6/18/2013 9.6 2.8 1.90 21.8 6/17/2014 10.6 2.92 2.44 24.2 <0.5 <20 <1 78.9 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/15/2015 9.33 2.64 2.18 21.9 <0.5 <20 <1 85.5 <1 <0.5 <1 <10 26.4 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/12/2016 11.2 2.91 2.66 24.9 <0.5 <20 <1 91.6 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/19/2017 12.7 3.27 2.81 25.1 <0.5 <20 <1 95.1 <1 <0.5 <1 <2 39.3 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/2/2018 10.1 2.66 2.24 23.4 <0.5 <20 <1 81.3 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/13/2019 10.3 2.55 2.24 22.4 <0.5 <20 <1 82.3 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/15/2020 9.08 2.29 2.01 21.8 <0.5 <20 <1 79 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/1/2021 10.1 3.13 3.11 21.9 <0.5 2830 <1 113 <1 <0.5 <1 5.44 4710 <0.2 65.8 <2 <5 1.26 <1 <5 <1 9.12 <20 Site: ACMW-06S SOUTH TAHOE PUBLIC UTILITY DISTRICT LPINE COUNTY GROUNDWATER QUALITY DA- 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 1/13/2021 15.38 5208.12 12.4 7.11 218 0.059 0.21 < 0.020 < 0.020 < 0.020 0.21 376 4/13/2021 15.02 5208.48 12.6 7.25 181 0.090 0.14 < 0.020 < 0.020 0.060 0.199 352 7/1/2021 16.38 5207.12 13.6 7.27 192 0.099 0.079 < 0.020 < 0.020 0.062 0.141 367 10/28/2021 14.55 5208.95 12.4 7.23 216 0.074 0.080 < 0.020 < 0.020 0.025 0.105 389 Maximum 16.38 5209.0 13.6 7.27 218 0.099 0.210 < 0.020 < 0.020 0.062 0.210 389 Minimum 14.55 5207.1 12.4 7.11 181 0.059 0.079 < 0.020 < 0.020 < 0.020 0.105 352 Average 15.33 5208.2 12.8 7.22 202 0.081 0.127 < 0.020 < 0.020 0.042 0.164 371 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-06S SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Fecal/ Fecal EC Chloride COD SO4 Color Coli E. coli Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 1/13/2021 610 59.2 19.9 < 1 < 1 4/13/2021 596 61.4 21.6 < 1 < 1 7/1/2021 604 60.9 22.0 < 1 < 1 10/28/2021 615 58.1 19.6 > 2420 < 1 Maximum 615 61.4 22.0 > 2420 < 1 Minimum 596 58.1 19.6 < 1 < 1 Average 606 59.9 20.8 606 < 1 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-06S SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 1989 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 89 14.8 5205.9 11.9 9.29 209 170 29.13 0.060 0.253 0.119 < 0.010 0.028 0.292 90 14.9 5205.9 12.7 8.12 207 276 12.33 0.069 0.152 0.028 0.010 0.065 0.227 91 14.5 5206.2 12.2 8.20 207 136 34.00 0.064 0.413 0.169 0.015 0.066 0.494 92 14.9 5205.8 12.1 8.57 195 344 2.30 0.049 0.288 0.068 0.012 0.066 0.366 93 14.6 5206.1 12.0 8.84 196 226 16.60 0.039 0.342 0.129 0.015 0.075 0.433 94 14.9 5205.8 12.1 9.00 182 230 19.07 0.056 0.347 0.092 0.017 0.068 0.433 95 15.9 5204.8 12.3 7.83 228 270 0.89 0.055 0.250 0.076 0.011 0.079 0.340 96 14.9 5205.8 12.5 8.55 243 299 12.10 0.056 0.647 0.231 0.017 0.035 0.699 97 14.7 5206.0 12.0 8.79 201 228 18.23 0.070 1.404 0.410 0.031 0.044 1.479 98 15.6 5205.1 11.3 9.36 175 163 29.30 0.037 0.506 0.181 0.032 0.049 0.589 99 15.9 5204.8 11.6 7.84 258 302 0.96 0.091 0.358 0.097 0.025 0.061 0.444 00 16.1 5204.6 11.5 7.04 253 330 0.80 0.048 0.176 0.047 0.020 0.021 0.137 01 16.4 5204.3 12.2 6.98 250 259 1.28 0.041 0.237 0.021 0.023 0.042 0.324 02 15.9 5204.8 11.8 7.90 225 181 26.02 0.041 0.297 0.014 0.050 0.365 03 15.5 5205.2 12.5 7.87 203 9.55 0.027 0.209 0.024 0.067 0.290 04 15.9 5204.8 11.9 7.78 194 152 9.43 0.037 0.236 0.108 0.072 0.074 0.372 05 15.5 5205.3 11.5 7.97 186 191 6.26 0.050 0.303 0.035 0.079 0.421 06 15.6 5205.1 12.2 7.52 205 244 0.65 0.045 0.210 0.039 0.065 0.303 07 16.1 5204.6 12.8 7.96 179 152 6.30 0.031 0.192 0.064 0.078 0.239 08 15.7 5205.0 12.6 7.74 215 256 1.04 0.056 0.223 0.059 0.050 0.201 09 15.5 5205.2 11.6 7.32 203 221 4.53 0.038 0.232 0.034 0.074 0.224 10 15.7 5205.0 12.0 8.13 186 166 13.30 0.048 0.270 0.022 0.060 0.217 11 15.2 5205.5 11.6 8.21 169 254 1.16 0.044 0.150 0.022 0.078 0.226 12 15.7 5207.8 12.4 8.00 190 0.054 0.162 0.059 0.029 0.058 0.239 13 15.6 5207.9 12.7 7.20 227 0.090 0.182 0.041 0.016 0.044 0.216 14 15.8 5207.7 12.3 7.59 229 0.074 0.094 0.029 0.015 0.034 0.114 15 16.2 5207.3 12.5 8.07 191 0.032 0.140 0.037 < 0.010 0.092 0.232 16 16.1 5207.4 12.9 8.51 167 0.035 0.142 0.060 < 0.018 0.105 0.260 17 15.5 5208.0 13.5 7.20 205 0.081 0.117 0.026 < 0.020 0.039 0.148 18 15.66 5207.8 13.3 7.42 216 0.097 0.125 0.022 < 0.023 0.044 0.169 19 15.5 5208.0 12.5 7.23 209 0.082 0.132 < 0.020 < 0.015 0.041 0.173 20 13.0 5210.5 13.5 7.67 203 0.088 0.233 < 0.020 0.021 0.065 0.276 21 15.3 5208.2 12.8 7.22 202 0.081 0.127 < 0.020 < 0.020 0.042 0.164 Maximum 16.4 5210.5 13.5 9.36 258 344 34.00 0.097 1.404 0.410 0.072 0.105 1.479 Minimum 13.0 5204.3 11.3 6.98 167 136 0.65 0.027 0.094 < 0.020 < 0.010 0.021 0.114 Average 15.4 5206.1 12.3 7.97 206 230 11.10 0.056 0.277 0.088 0.025 0.059 0.336 #Tests 33 33 33 33 33 22 23 33 33 24 33 33 33 Site: ACMW-06S SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2021 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 89 359 666 70.3 6 37.1 < 2 < 2 90 422 673 75.9 6 33.1 < 5 9 4 91 408 654 86.4 < 5 22.4 5 8 3 92 424 705 90.7 < 5 25.2 13 3 < 2 93 401 679 86.1 7 24.8 < 5 6 < 2 < 2 94 368 643 93.4 5 25.4 < 4 4 2 95 430 719 92.5 5 28.0 8 3 2 96 437 667 85.9 17 29.0 5 12.1 7 97 368 568 77.6 10 25.2 8 12.6 2.8 98 315 555 76.8 6 25.0 < 5 17.6 2.6 99 415 680 76.6 < 5 46.3 5 5.8 < 1.1 00 454 741 74.9 < 5 32.8 < 5 < 1.1 < 1.1 01 440 722 72.8 7 30.5 < 5 < 1.1 < 1.1 02 393 640 69.2 6 27.1 10 < 1.1 < 1.1 03 381 639 69.3 < 5 26.5 < 5 < 1.1 < 1.1 04 377 572 67.8 6 26.1 8 2.9 < 1.1 05 358 542 68.9 < 5 25.8 5 1.9 < 1.1 06 382 638 63.5 < 9 25.7 1.3 < 1.1 07 356 604 61.4 5 25.1 < 1.1 < 1.1 08 378 625 62.0 6 25.8 12 1.2 < 1.1 09 366 578 61.0 < 5 24.7 < 1.1 < 1.1 10 351 574 60.3 6 23.0 1.4 < 1.1 11 336 570 61.2 8 22.4 8.7 < 1.1 12 366 598 59.6 23.7 1.3 < 1.1 13 380 617 56.8 25.2 5.1 < 1.1 14 387 642 58.2 26.8 1.7 < 1.1 15 355 592 60.7 28.6 7.4 < 1.0 16 330 541 62.0 31.6 1.0 < 1.0 17 353 622 56.5 26.3 1.0 < 1.0 18 375 605 56.3 25.8 4.1 < 1.0 19 375 610 56.8 23.4 < 1.0 < 1.0 20 373 610 62.7 23.4 < 1.0 < 1.0 21 371 606 59.9 20.8 605.8 < 1.0 Maximum 454 741 93.4 17 46.3 13 605.8 7.0 < 2 Minimum 315 541 56.3 < 5 20.8 < 4 < 1.0 < 1.0 < 2 Average 381 627 69.5 7 27.0 7 22.3 1.6 < 2 #Tests 33 33 33 23 33 17 33 33 1 Site AC MW-06S Nitrate-Nitrogen &Water Level Chlorides 5 5210 200 180 4 5208 160 140 3 Ir 5206 m 120 rnC -a 100 C L C 2 5204 2 80 60 1 5202 40 20 0 5200 0 rn M . r rn M . n rn m rn m r rn c+> in r rn co rn rn rn rn rn o 0 0 0 rn 0 N w m m m m m o 0 0 0 0 7 N Nitrate f Water Level Linear(Nitrate) Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 1000 0.4 900 800 700 0.3 600 500 £ 0.2 400 300 0.1 200 100 0 0.0 ao rn rn m m m o 0 0 0 0 � N ro m rn m m rn o 0 0 0 0 � N TDS Linear(TDS) ---$--Total P Linear(Total P) Annual Metal Report ACM W-06S Celio Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 11/2/1988 56 10 25 46 <10 1100 <4 77 <0.1 <10 <20 1900 <0.2 590 14 <50 2 <1 13 11/28/1989 103 10.1 15.4 39.8 <10 <100 <10 390 <1 <10 <50 <100 <1 250 <10 <5 <50 8/1/1990 72 8.2 28 37 <10 <50 <4 160 <0.1 <10 <20 <30 <0.2 47 <1 <1 <10 8/21/1991 76 8.2 33 37 <10 230 <4 250 0.1 <10 <20 190 <0.2 200 1 <1 <10 7/21/1992 78 8.2 16 41 <10 <50 <4 200 <0.1 <10 <20 33 <0.2 54 <1 <1 <10 7/19/1994 75 8.3 17 50 <10 440 <2 200 0.7 <10 <20 230 <0.2 140 <1 <1 8 8/15/1995 96 7.6 30 44 <10 87 1.4 290 <0.1 <10 <10 58 <0.2 280 <1 <1 <5 6/19/1996 81 9.1 32 52 <10 74 1 36 0.2 <10 <10 2400 <0.2 360 <1 <1 <5 6/16/1997 81 9 18 40 <10 46 <2 190 <0.5 <10 <25 <50 <0.5 73 <5 <5 <50 7/21/1998 60 8.03 12.5 40.1 <10 <25 6 190 <0.5 <10 <20 <30 <0.5 <20 <2.5 <5 26.3 6/20/1999 63.6 8.12 17.2 41.0 <10 66 <2 216 <1 <0.1 <10 <20 <100 <0.2 123 <5 <2.5 <3 <1 <1 <10 6/19/2001 35.5 7.47 26 38.3 <10 <2 115 <20 <100 74 <2.5 <10 6/18/2002 58.1 7.4 15.7 37.0 <10 50 <2 170 <0.2 <0.2 3 <20 <100 0.02 <20 2 <2.5 <1 <2 <0.2 <10 6/17/2003 56.6 6.48 12.6 39.5 <10 160 <2 139 <0.2 <0.2 3 <20 134 <0.01 345 3 <2.5 <1 <2 <0.2 <10 5/18/2004 83.4 6.88 14.6 35.6 <10 240 <2 173 <0.2 <0.2 3 <20 156 0.03 140 2 <2.5 <1 <2 <0.2 <10 6/14/2005 58.3 7.08 13.2 34.0 <10 <2 <100 <20 935 311 <2.5 <10 6/1/2006 58.0 7.08 23.5 33.8 <10 <50 <2 <2 <2 <2 <20 <100 <0.2 <20 2 3 <2.5 <2 <10 <1 <2 <10 6/19/2007 63.8 7.21 25.1 32.8 <10 <20 3.45 200 <1 <0.5 <1 <20 106 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/4/2008 69.1 7.92 24.5 33.8 <10 48 2.54 210 <1 <0.5 <1 <20 127 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/17/2009 64.3 7.71 15.7 34.3 14.2 970 2.39 150 <1 <0.5 <1 <20 1030 <0.2 115 8.1 <5 <2.5 <1 <5 <1 <3 13.7 6/9/2010 62.0 6.90 17.0 35.0 <0.5 200 <1 150 <1 <0.5 <1 2.2 <20 <0.2 35 5.7 <5 <0.5 <1 <5 <1 <3 <20 6/14/2011 57.9 7.25 11.3 36.7 <0.5 263 <1 100 <1 <0.5 1.1 <2 <20 <0.2 8.46 7.83 <5 <0.5 <1 <5 <1 <3 <20 6/14/2012 408 2.72 193 <1 <0.5 <1 <0.2 2.51 <5 <1 <5 <1 <3 6/18/2013 57.9 6.92 18.7 32.0 6/17/2014 60.8 6.78 22.3 31.8 <0.5 85 1.96 172 <1 <0.5 <1 2.29 <20 <0.2 5.82 2.26 <5 <0.5 <1 <5 <1 <3 <20 7/15/2015 44.7 6.72 12.6 31.6 <0.5 137 <1 148 <1 <0.5 <1 <10 <20 <0.2 9.76 5.01 <5 <0.5 <1 <5 <1 <3 <20 7/12/2016 52.3 6.58 21.8 30.3 <0.5 20.8 1.16 159 <1 <0.5 <1 <2 <20 <0.2 181 2.64 <5 <0.5 <1 <5 <1 <3 <20 7/19/2017 57.3 6.92 22.7 32.3 <0.5 33.1 1.29 151 <1 <0.5 <1 <2 <20 <0.2 11.7 <2 <5 <0.5 <1 <5 <1 <3 <20 8/6/2018 60.5 6.94 23.0 30.9 <0.5 22.5 1.5 166 <1 1.29 <1 2.3 129 <0.2 16.5 <2 13.7 <0.5 <1 <5 <1 <3 <20 8/13/2019 57.3 6.74 22.7 29.7 <0.5 <20 2.2 175 <1 <0.5 <1 <2 <20 <0.2 3.59 <2 <5 <0.5 <1 <5 <1 <3 <20 7/15/2020 53.5 6.55 21.4 29.1 <0.5 53.4 1.97 180 <1 <0.5 <1 <2 23.2 <0.2 16.6 <2 <5 <0.5 <1 <5 <1 <3 <20 7/1/2021 55.4 6.40 21.9 28.4 <0.5 <20 2.13 172 <1 <0.5 <1 <2 16.2 <0.2 2.68 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-20 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NOZ-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 2/10/2021 16.00 5074.30 11.3 6.24 34.5 0.056 < 0.10 < 0.020 < 0.010 0.625 0.62 5/20/2021 6.79 5083.51 11.0 6.37 31.8 0.059 0.11 < 0.020 < 0.010 0.984 1.09 8/18/2021 14.10 5076.20 13.6 5.94 32.7 0.064 0.07 < 0.020 < 0.020 0.082 0.150 11/15/2021 14.67 5075.63 14.5 6.31 33.0 0.071 < 0.050 < 0.020 < 0.010 0.252 0.279 Maximum 16.00 5083.51 14.5 6.37 34.5 0.071 0.11 < 0.020 < 0.020 0.98 1.09 Minimum 6.79 5074.30 11.0 5.94 31.8 0.056 < 0.050 < 0.020 < 0.010 0.082 0.15 Average 12.89 5077.41 12.6 6.22 33.0 0.063 0.083 < 0.020 < 0.013 0.486 0.53 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-20 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 2/10/2021 71 90.2 2.25 2.24 < 1 < 1 5/20/2021 75 99.8 2.36 2.68 < 1 < 1 8/18/2021 61 70.3 1.80 1.97 2.0 < 1 11/15/2021 64 81.2 2.17 2.32 7.5 < 1 Maximum 75 99.8 2.36 2.68 7.5 < 1 Minimum 61 70.3 1.80 1.97 < 1 < 1 Average 68 85.4 2.15 2.30 2.9 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-20 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 10.9 5079.4 11.5 6.11 33.4 1.2 0.054 0.073 0.025 < 0.010 0.516 0.599 13 10.6 5079.7 11.6 6.20 31.4 0.085 0.051 0.026 < 0.013 0.623 0.856 14 12.7 5077.6 12.2 6.31 29.7 0.066 0.065 0.025 < 0.013 0.946 1.334 15 13.2 5077.1 12.8 6.17 31.5 0.066 0.057 0.020 0.011 0.512 0.561 16 11.6 5078.8 13.1 6.15 30.9 0.058 0.375 < 0.020 < 0.063 5.344 5.626 17 9.3 5081.0 11.7 6.16 30.3 0.063 0.163 0.021 < 0.020 2.943 3.066 18 13.8 5076.5 12.8 6.08 34.1 0.064 0.163 0.020 < 0.013 0.717 0.739 19 10.4 5079.9 12.0 6.05 32.3 0.063 0.125 < 0.020 < 0.015 1.920 1.938 20 12.3 5078.0 12.5 6.10 32.8 0.066 0.110 < 0.020 < 0.010 0.342 0.410 21 12.9 5077.4 12.6 6.22 33.0 0.063 0.083 < 0.020 < 0.013 0.486 0.535 Maximum 13.8 5081.0 13.1 6.31 34.1 1.2 0.085 0.375 0.026 0.063 5.344 5.626 Minimum 9.3 5076.5 11.5 6.05 29.7 1.2 0.054 0.051 < 0.020 < 0.010 0.342 0.410 Average 11.8 5078.5 12.3 6.15 31.9 1.2 0.065 0.126 0.022 0.018 1.435 1.566 #Tests 10 10 10 10 10 0 1 10 10 10 10 10 10 Site: ACMW-20 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2012 To: 2021 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 67 78 1.32 2.20 1 < 1 13 70 78 1.62 2.42 1 < 1 14 66 77 1.65 2.27 1 < 1 15 67 85 2.02 2.96 32 < 1 16 107 130 2.65 3.72 6 < 1 17 97 108 3.03 4.61 10 < 1 18 74 87 1.77 2.96 < 1 < 1 19 78 99 2.93 2.70 25 < 1 20 66 81 2.18 1.93 123 < 1 21 68 85 2.15 2.30 3 < 1 Maximum 107 130 3.03 4.61 123 1 Minimum 66 77 1.32 1.93 1 < 1 Average 76 91 2.13 2.81 20 1 #Tests 10 10 10 0 10 0 10 10 0 Site ACMW-20 Nitrate-Nitrogen &Water Level Chlorides 20 5088 50 i 16 5084 40 12 5080 3: 30 J y J J a 8 5076 20 4 5072 10 0 5068 0 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 Nitrate f Water Level Linear(Nitrate) Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 - 0.50 400 0.40 300 0.30 J J 01 � E E 200 0.20 100 0.10 0 0.00 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 t TDS Total P Annual Metal Report ACM W-20 Diamond Valley Rd - Paynesville Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb Sb se TI v Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/20/2012 8.73 2.27 1.87 5.05 <10 62.3 <1 21.7 <1 <0.5 <1 <20 113 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/11/2013 5.50 1.83 1.22 3.84 7/8/2014 6.55 2.04 1.62 4.34 <0.5 103 1.54 19.9 <1 <0.5 <1 2.32 502 <0.2 3.41 <2 <5 <0.5 <1 <5 <1 <3 <20 8/18/2015 8.28 2.5 2.11 5.25 <0.5 61.6 <1 22.4 <1 <0.5 <1 <2 91.6 <0.2 <2 2.11 <5 <0.5 <1 <5 <1 <3 <20 7/27/2016 8.20 2.21 2.04 5.24 <0.5 41.6 <1 20.9 <1 <0.5 <1 <2 33.7 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/16/2017 5.85 1.58 1.32 4.70 <0.5 466 <1 18.4 <1 <0.5 <1 <2 488 <0.2 3.59 1.96 <5 <0.5 <1 <5 <1 3.3 <20 8/29/2018 7.61 1.94 1.87 5.19 <0.5 68.8 <1 21.9 <1 <0.5 <1 <2 65.6 <0.2 <2 1.99 <5 <0.5 <1 <5 <1 <3 <20 8/14/2019 5.94 1.74 1.38 4.73 <0.5 568 <1 18.8 <1 <0.5 <1 1.96 565 <0.2 4.08 2.27 <5 0.54 <1 <5 <1 3.8 <20 8/8/2020 6.32 1.56 1.58 4.55 <0.5 296 <1 18.9 <1 <0.5 <1 <2 338 <0.2 3.68 2.3 <5 <0.5 <1 <5 <1 <3 <20 8/18/2021 6.94 1.69 1.76 4.79 <0.5 94.9 <1 19.3 <1 <0.5 <1 <2 55.6 <0.2 <2 2.43 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-21 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NOZ-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 02/17/2021 24.01 4987.32 9.3 6.38 35.8 0.045 < 0.10 < 0.020 < 0.020 0.342 0.34 04/27/2021 13.50 4997.83 8.8 6.56 33.3 0.071 < 0.05 < 0.020 < 0.030 0.672 0.699 08/11/2021 15.22 4996.11 12.8 7.24 41.3 0.080 0.340 < 0.020 < 0.020 4.61 4.95 11/10/2021 21.28 4990.05 11.3 6.05 37.4 0.071 0.57 < 0.020 < 0.010 2.56 3.13 Maximum 24.01 4997.83 12.8 7.24 41.3 0.080 0.570 < 0.020 < 0.030 4.61 4.95 Minimum 13.50 4987.32 8.8 6.05 33.3 0.045 0.050 < 0.020 < 0.010 0.342 0.340 Average 18.50 4992.83 10.6 6.56 37.0 0.067 0.265 < 0.020 < 0.020 2.05 2.28 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-21 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 02/17/2021 74 95.6 3.80 3.57 < 1 < 1 04/27/2021 63 102 4.89 3.58 2.0 < 1 08/11/2021 167 219 29.2 6.82 < 1 < 1 11/10/2021 115 175 17.9 3.95 < 1 < 1 Maximum 167 219 29.2 6.82 2 < 1 Minimum 63 96 3.80 3.57 < 1 < 1 Average 105 148 13.9 4.48 1.3 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-21 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 13.4 4997.9 10.4 6.13 37.4 2.3 0.031 0.113 0.024 < 0.022 2.065 2.201 13 14.9 4997.0 10.1 6.29 34.2 0.047 0.099 0.025 < 0.016 1.003 1.124 14 13.3 4998.0 9.2 6.45 38.1 0.042 0.124 0.021 < 0.013 1.033 1.491 15 17.7 4993.6 10.1 6.30 41.5 0.053 0.081 < 0.020 0.018 1.320 1.391 16 13.7 4997.6 10.9 6.29 38.1 0.063 < 0.063 < 0.020 < 0.015 0.865 0.860 17 9.9 5001.4 10.6 6.14 39.6 0.066 0.094 0.021 < 0.015 2.283 2.276 18 12.8 4998.5 10.7 5.97 36.2 0.062 0.215 0.020 < 0.015 2.970 2.276 19 12.4 4998.9 9.9 6.17 34.0 0.063 0.115 < 0.020 < 0.010 2.964 2.984 20 12.5 4998.8 8.9 6.49 33.6 0.082 0.411 < 0.020 < 0.010 1.428 1.106 21 18.5 4992.8 10.6 6.56 37.0 0.067 0.265 < 0.020 < 0.020 2.046 2.280 Maximum 18.5 5001.4 10.9 6.56 41.5 2.3 0.082 0.411 0.025 0.022 2.970 2.984 Minimum 9.9 4992.8 8.9 5.97 33.6 2.3 0.031 0.063 < 0.020 < 0.010 0.865 0.860 Average 13.9 4997.5 10.1 6.28 37.0 2.3 0.058 0.158 0.021 0.015 1.798 1.799 #Tests 10 10 10 10 10 0 1 10 10 10 10 10 10 Site: ACMW-21 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2012 To: 2021 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 99 143 12.1 5.76 6 < 1 13 83 114 8.2 4.16 1 < 1 14 84 119 7.6 4.06 1 < 1 15 96 135 7.4 4.94 < 1 < 1 16 83 113 5.9 3.88 < 1 < 1 17 110 156 13.9 4.01 2 1 18 117 169 17.2 4.31 8 1 19 105 147 13.8 4.61 9 < 1 20 69 97 4.8 2.54 1 < 1 21 105 148 13.9 4.48 1 < 1 Maximum 117 169 17.2 5.76 9 1 Minimum 69 97 4.8 2.54 1 < 1 Average 95 134 10.5 4.27 3 1 #Tests 10 10 10 0 10 0 10 10 0 Site ACMW-21 Nitrate-Nitrogen &Water Level Chlorides 10 5002 50 i 8 5000 40 4998 C 6 d 30 J d J a� 4996 J a E E 4 ;� 20 4994 2 10 4992 0 1 4990 0 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 Nitrate f Water Level Linear(Nitrate) Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 - 0.50 400 0.40 300 0.30 J J 01 � E E 200 0.20 100 0.10 0 0.00 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 TDS Total P Annual Metal Report ACMW-21 River Ranch Rd Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/20/2012 5.69 1.57 1.5 11.9 <10 110 <1 20 <1 <0.5 <1 <20 89.4 <0.2 <20 3.08 <5 <2.5 <1 <5 <1 <3 <10 6/11/2013 4.91 1.32 1.23 8.66 7/8/2014 7.09 1.57 1.98 10.1 <0.5 22.1 <1 19.4 <1 <0.5 <1 <2 29.8 <0.2 <2 3.97 <5 <0.5 <1 <5 <1 <3 <20 8/18/2015 12.5 2.14 3.53 14.7 <0.5 <20 <1 37.3 <1 <0.5 <1 <2 <20 <0.2 <2 2.91 <5 <0.5 <1 <5 <1 <3 <20 7/27/2016 7.78 1.84 2.20 12.3 <0.5 55 <1 23.4 <1 <0.5 <1 <2 27.3 <2 2.95 <5 <0.5 <1 <5 <1 <3 <20 8/16/2017 8.55 2.02 2.31 12.6 <0.5 <20 <1 26.3 <1 <0.5 <1 <2 <20 <0.2 <2 2.78 <5 <0.5 <1 <5 <1 <3 <20 8/14/2018 13.8 2.26 3.60 14.0 <0.5 <20 <1 39 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/18/2019 8.73 1.79 2.27 10.1 <0.5 <20 <1 27.2 <1 <0.5 <1 2.39 <20 <0.2 <2 2.64 <5 <0.5 <1 <5 <1 <3 <20 7/27/2020 11.0 1.8 2.80 9.7 <0.5 <20 <1 30 <1 <0.5 1.1 <2 <20 <0.2 <2 2.70 <5 <0.5 <1 <5 <1 <3 <20 8/11/2021 20.2 2.78 5.27 14.4 <0.5 <20 <1 63.4 <1 <0.5 <1 <2 <20 <0.2 <2 2.70 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-22 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NOZ-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 02/17/2021 33.80 4985.48 10.6 6.23 42.2 0.019 0.11 < 0.020 < 0.020 0.495 0.60 04/27/2021 28.39 4990.89 11.4 6.25 44.3 0.019 < 0.05 < 0.020 < 0.020 0.522 0.531 08/11/2021 29.01 4990.27 12.9 6.67 42.8 0.012 < 0.050 < 0.020 < 0.020 0.754 0.740 11/10/2021 34.43 4984.85 11.7 6.06 42.6 0.02 < 0.050 < 0.020 < 0.020 0.816 0.817 Maximum 34.43 4990.89 12.9 6.67 44.3 0.020 0.110 < 0.020 < 0.020 0.82 0.82 Minimum 28.39 4984.85 10.6 6.06 42.2 0.012 < 0.050 < 0.020 < 0.020 0.50 0.53 Average 31.41 4987.87 11.7 6.30 43.0 0.018 0.065 < 0.020 < 0.020 0.65 0.67 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-22 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 02/17/2021 80 101 1.38 3.16 < 1 < 1 04/27/2021 70 103 1.11 2.94 < 1 < 1 08/11/2021 79 94.6 1.42 2.81 < 1 < 1 11/10/2021 79 104 1.38 2.92 < 1 < 1 Maximum 80 104 1.42 3.16 < 1 < 1 Minimum 70 94.6 1.11 2.81 < 1 < 1 Average 77 101 1.32 2.96 < 1 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-22 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 30.5 4988.8 10.1 6.28 31.2 2.6 0.026 0.057 0.028 < 0.010 0.58 0.646 13 32.5 4986.7 10.9 6.18 34.0 0.062 0.057 0.027 < 0.019 1.61 1.365 14 32.6 4986.7 11.9 6.24 36.7 0.017 0.102 0.023 < 0.019 2.02 2.053 15 33.3 4986.0 11.8 6.15 37.4 0.017 0.072 < 0.020 < 0.020 2.36 2.413 16 30.0 4989.3 13.1 6.14 38.8 0.017 0.128 < 0.020 < 0.025 2.62 2.650 17 22.7 4996.6 12.6 5.94 37.0 0.021 0.094 < 0.020 < 0.033 2.79 2.775 18 27.2 4992.1 12.3 5.93 34.2 0.020 0.103 < 0.020 < 0.015 2.33 2.378 19 26.9 4992.3 11.7 6.14 36.9 0.017 0.090 < 0.020 < 0.010 2.61 2.588 20 28.1 4991.1 11.3 6.34 37.2 0.021 0.170 < 0.020 < 0.013 0.74 0.883 21 31.4 4987.9 11.7 6.30 43.0 0.018 0.065 < 0.020 < 0.020 0.65 0.672 Maximum 33.3 4996.6 13.1 6.34 43.0 2.6 0.062 0.170 0.028 0.033 2.79 2.775 Minimum 22.7 4986.0 10.1 5.93 31.2 2.6 0.017 0.057 < 0.020 0.010 0.58 0.646 Average 29.5 4989.8 11.7 6.16 36.6 2.6 0.023 0.094 0.022 0.018 1.83 1.842 #Tests 10 10 10 10 10 0 1 10 10 10 10 10 10 Site: ACMW-22 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2012 To: 2021 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 63 73 1.12 4.10 < 1 < 1 13 75 94 2.86 1.81 < 1 < 1 14 81 106 3.89 1.72 1 < 1 15 84 118 4.15 1.68 4 < 1 16 86 118 3.79 1.77 1 < 1 17 90 110 2.56 2.02 45 < 1 18 84 109 3.81 2.12 44 < 1 19 89 113 3.83 2.32 < 1 < 1 20 73 93 1.20 3.14 3 < 1 21 77 101 1.32 2.96 < 1 < 1 Maximum 90 118 4.15 4.10 45 1 Minimum 63 73 1.12 1.68 < 1 < 1 Average 80 103 2.85 2.36 10 1 #Tests 10 10 10 0 10 0 10 10 0 Site ACMW-22 Nitrate-Nitrogen &Water Level Chlorides 10 5000 50 I 8 4995 40 6 4990 m 30 J y J J a E y E 4 4985 ;� 20 2 4980 10 0 4975 0 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 Nitrate f Water Level Linear(Nitrate) Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 0.50 400 0.40 300 0.30 J J 01 07 E E 200 0.20 100 0.10 0 0.00 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 TDS Total P Annual Metal Report ACMW-22 Fredericksburg Ln Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/20/2012 7.18 2.06 1.6 4.13 <10 127 <1 16.9 <1 <0.5 <1 <20 127 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/11/2013 8.95 2.34 1.57 4.66 7/8/2014 10.9 2.57 2.49 5.43 <0.5 <20 <1 27.2 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/18/2015 10.6 2.33 2.49 5.11 <0.5 <20 <1 26.6 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/27/2016 11.3 2.64 2.66 5.60 <0.5 <20 <1 26.4 <1 <0.5 <1 <2 <20 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/16/2017 9.64 2.32 2.20 4.96 <0.5 <20 <1 23.6 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/14/2018 10.4 2.21 2.30 5.18 <0.5 <20 <1 23.5 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/18/2019 12.3 2.68 2.82 5.82 <0.5 444 <1 34.7 <1 <0.5 <1 <2 0.366 <0.2 11.6 <2 <5 <0.5 <1 <5 <1 <3 <20 7/27/2020 11.0 2.90 2.90 5.30 <0.5 4300 <1 47.0 <1 <0.5 4.0 7.7 3500 <0.2 69 <2 <5 1.3 <1 <5 <1 8.9 <20 8/11/2021 10.9 2.35 2.45 5.35 <0.5 192 <1 26.0 <1 <0.5 1.10 <2 154 <0.2 4.96 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-23 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 02/24/21 19.02 4959.33 13.9 7.27 171 0.042 < 0.10 < 0.020 < 0.020 1.09 1.1 269 04/27/21 18.40 4959.95 14.1 7.34 172 0.031 < 0.05 < 0.020 < 0.020 1.06 1.04 258 08/10/21 18.33 4960.02 16.4 7.39 172 0.038 < 0.050 < 0.020 < 0.010 1.05 1.05 265 11/10/21 19.70 4958.65 14.6 7.18 172 0.076 < 0.050 < 0.020 < 0.020 1.08 1.06 273 Maximum 19.70 4960.02 16.4 7.39 172 0.076 < 0.100 < 0.020 < 0.020 1.09 1.10 273 Minimum 18.33 4958.65 13.9 7.18 171 0.031 < 0.050 < 0.020 < 0.010 1.05 1.040 258 Average 18.86 4959.49 14.8 7.30 172 0.047 < 0.063 < 0.020 < 0.018 1.07 1.063 266 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-23 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Fecal/ Fecal EC Chloride COD SO4 Color Coli E. coli Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 02/24/21 380 4.54 20.0 < 1 < 1 04/27/21 378 3.63 20.1 < 1 < 1 08/10/21 374 3.92 20.2 < 1 < 1 11/10/21 385 4.05 18.9 < 1 < 1 Maximum 385 4.54 20.2 < 1 < 1 Minimum 374 3.63 18.9 < 1 < 1 Average 379 4.04 19.8 < 1 < 1 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-23 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 18.6 4959.7 15.1 7.39 177 16 0.250 0.068 0.026 < 0.014 1.06 1.142 13 18.9 4959.5 14.9 7.31 175 0.152 0.091 0.024 < 0.013 1.04 1.079 14 19.0 4959.4 15.6 7.34 175 0.100 0.062 0.026 < 0.010 1.00 1.010 15 21.8 4956.6 15.0 7.35 174 0.033 0.054 < 0.020 < 0.010 1.02 1.050 16 17.0 4961.3 15.6 7.29 173 0.031 0.063 < 0.020 < 0.010 1.02 0.976 17 17.5 4960.8 15.4 7.32 173 0.043 0.092 0.021 < 0.017 1.03 0.991 18 18.2 4960.1 15.7 7.09 172 0.042 0.063 0.020 < 0.010 1.03 1.035 19 14.7 4963.6 14.6 7.21 172 0.036 0.083 < 0.020 < 0.010 1.00 0.963 20 18.4 4960.0 14.4 7.36 174 0.035 0.218 < 0.020 < 0.015 1.02 1.208 21 18.9 4959.5 14.8 7.30 172 0.047 < 0.063 < 0.020 < 0.018 1.07 1.063 Maximum 21.8 4963.6 15.7 7.39 177 16 0.250 0.218 0.026 < 0.018 1.07 1.208 Minimum 14.7 4956.6 14.4 7.09 172 16 0.031 0.054 < 0.020 < 0.010 1.00 0.963 Average 18.3 4960.0 15.1 7.29 174 16 0.077 0.085 0.022 < 0.013 1.03 1.052 #Tests 10 10 10 10 10 0 1 10 10 10 10 10 10 Site: ACMW-23 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2012 To: 2021 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 269 378 4.22 17.8 1 < 1 13 271 379 4.15 19.7 1 < 1 14 271 379 4.23 19.8 1 < 1 15 273 384 4.14 19.2 9 < 1 16 266 373 4.22 19.8 1 < 1 17 262 370 4.33 19.3 < 1 < 1 18 267 376 4.05 19.2 < 1 < 1 19 266 381 3.89 19.9 < 1 < 1 20 264 378 3.81 19.4 < 1 < 1 21 266 379 4.04 19.8 < 1 < 1 Maximum 273 384 4.33 19.9 9 1 Minimum 262 370 3.81 17.8 1 < 1 Average 267 378 4.11 19.4 2 < 1 #Tests 10 10 10 0 10 0 10 10 0 Site ACMW-23 Nitrate-Nitrogen &Water Level Chlorides 10 4970 50 i 8 4965 40 x 6 4960 d 30 J J J E E 4 4955 3 20 2 4950 10 0 4945 0 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 t Nitrate t Water Level Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 - 0.50 400 0.40 300 0.30 J J 01 � 200 0.20 100 0.10 0 0.00 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 t TDS Total P Annual Metal Report ACMW-23 Scott Brooke's Ranch by Irrigation Ditch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/20/2012 31.4 4.47 12.6 33.1 <10 582 2.58 90.4 <1 <0.5 1.16 <20 1020 <0.2 <20 2.4 <5 <2.5 <1 <5 <1 13 <10 6/11/2013 30.0 5.38 13.2 32.2 7/8/2014 33.8 6.79 17.3 31.8 <5 6630 <10 122 <10 <5 <10 20.2 12700 <0.2 220 <20 <50 <5 <10 <50 <10 38.6 <200 8/18/2015 32.7 4.70 13.2 29.3 <0.5 2430 3.54 107 <1 <0.5 3.66 15.2 4990 <0.2 99.3 2.54 <5 0.83 <1 <5 <1 22.4 <20 7/27/2016 30.5 4.63 14.0 31.5 <0.5 1670 2.68 110 <1 <0.5 3.47 7.54 3610 59.6 2.04 <5 <0.5 <1 <5 <1 16.4 <20 8/16/2017 31.3 4.44 13.4 31.0 <0.5 2080 3.41 119 <1 <0.5 4.39 9.37 3810 <0.2 74.4 2.28 <5 <0.5 <1 <5 <1 19.5 <20 8/14/2018 32.6 4.27 13.6 32.3 <0.5 832 4.86 101 <1 <0.5 1.2 11.6 1810 <0.2 33.2 2.27 <5 <0.5 <1 <5 <1 15.2 <20 7/18/2019 31.8 4.45 13.5 32.4 <0.5 1060 2.58 122 <1 <0.5 1.86 11.4 2.12 <0.2 37.1 2.22 <5 <0.5 <1 <5 <1 14.9 <20 7/27/2020 32.0 4.00 13.0 32.0 <0.5 340 2.00 100 <1 <0.5 1.2 6.7 630 <0.2 14.0 2.22 <5 <0.5 <1 <5 <1 11.0 <20 8/10/2021 31.8 4.34 13.6 32.0 <0.5 1030 2.63 112 <1 <0.5 2.10 9.88 1830 <0.2 34.2 2.21 <5 <0.5 <1 <5 <1 15.1 <20 Site: ACMW-24 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 03/29/2021 25.00 4928.25 14.4 6.69 183 0.079 0.19 < 0.020 < 0.030 2.26 2.45 04/27/2021 25.10 4928.15 12.3 6.72 175 0.071 0.57 < 0.020 < 0.030 2.51 3.08 08/10/2021 24.63 4928.62 13.4 6.63 202 0.204 0.24 < 0.020 < 0.010 1.16 1.40 11/10/2021 25.61 4927.64 13.3 6.35 189 0.082 < 0.050 < 0.020 < 0.030 1.84 1.88 Maximum 25.61 4928.62 14.4 6.72 202 0.204 0.57 < 0.020 < 0.030 2.51 3.08 Minimum 24.63 4927.64 12.3 6.35 175 0.071 < 0.05 < 0.020 < 0.010 1.16 1.40 Average 25.09 4928.17 13.4 6.60 187 0.109 0.263 < 0.020 < 0.025 1.94 2.20 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-24 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 03/29/2021 364 536 41.8 38.7 < 1 < 1 04/27/2021 367 630 49.5 44.7 < 1 < 1 08/10/2021 415 669 57.5 32.3 < 1 < 1 11/10/2021 378 612 49.1 30.3 < 1 < 1 Maximum 415 669 57.5 44.7 < 1 < 1 Minimum 364 536 41.8 30.3 < 1 < 1 Average 381 612 49.5 36.5 < 1 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-24 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 24.4 4928.9 13.0 6.64 168 12 0.268 0.166 0.028 0.025 2.11 2.298 13 25.4 4927.9 13.5 6.59 165 0.127 0.124 0.024 < 0.019 2.09 2.171 14 25.2 4928.0 13.9 6.62 162 0.200 0.128 0.025 < 0.018 2.18 2.283 15 25.3 4927.9 13.7 6.58 155 0.080 0.079 < 0.020 0.018 1.91 1.975 16 24.5 4928.7 13.9 6.49 160 0.076 0.145 < 0.020 < 0.020 1.63 1.745 17 23.3 4930.0 13.6 6.55 169 0.073 < 0.095 < 0.020 < 0.020 1.84 1.873 18 24.8 4928.5 14.0 6.38 172 0.072 < 0.125 < 0.020 < 0.013 1.62 1.710 19 23.3 4930.0 12.8 6.45 184 0.077 < 0.077 < 0.020 < 0.010 2.15 2.163 20 24.6 4928.7 13.0 6.70 180 0.074 < 0.365 < 0.020 < 0.015 2.12 2.460 21 25.1 4928.2 13.4 6.60 187 0.109 0.263 < 0.020 < 0.025 1.94 2.203 Maximum 25.4 4930.0 14.0 6.70 187 12 0.268 0.365 0.028 0.025 2.18 2.460 Minimum 23.3 4927.9 12.8 6.38 155 12 0.072 < 0.077 < 0.020 < 0.010 1.62 1.710 Average 24.6 4928.7 13.4 6.56 170 12 0.116 0.157 0.022 0.018 1.96 2.088 #Tests 10 10 10 10 10 0 1 10 10 10 10 10 10 Site: ACMW-24 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2012 To: 2021 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 334 523 39.1 38.4 2 < 1 13 342 535 46.6 31.3 1 < 1 14 352 552 55.1 28.8 < 1 < 1 15 345 531 49.1 31.1 < 1 < 1 16 354 563 62.9 26.8 < 1 < 1 17 427 674 88.5 32.8 3 3 18 384 641 64.4 36.2 < 1 < 1 19 402 653 67.5 40.0 16 < 1 20 378 617 52.9 42.2 < 1 < 1 21 381 612 49.5 36.5 < 1 < 1 Maximum 427 674 88.5 42.2 16 3 Minimum 334 523 39.1 26.8 < 1 < 1 Average 370 590 57.6 34.4 3 1 #Tests 10 10 10 0 10 0 10 10 0 Site ACMW-24 Nitrate-Nitrogen &Water Level Chlorides 10 100 4938 4933 90 8 4928 80 4923 4918 70 6 4913 60 J 4908 rn 50 £ 4 4903 3 40 4898 30 4893 2 20 4888 4883 10 0 4878 0 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 Nitrate t Water Level Linear(Nitrate) Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 - 0.50 400 0.40 300 0.30 J J 01 i 200 0.20 100 0.10 0 0.00 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 t TDS Total P Annual Metal Report ACMW-24 Scott Brooke's Ranch by Irrigation Ditch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/20/2012 46.1 4.04 19 39.4 <10 719 2.32 121 <1 <0.5 <1 <20 874 <0.2 89 <2 <5 <2.5 <1 <5 <1 10.6 <10 6/11/2013 43.8 3.64 18.4 37.9 7/8/2014 52.0 5.12 26.0 42.3 <1 4200 6.38 264 <2 <1 4.52 6.02 4760 <0.2 181 <4 <10 1.3 <2 <10 <2 23.9 <40 8/18/2015 44.2 3.39 19.1 38.0 <0.5 40.4 1.46 190 <1 <0.5 <1 <2 180 <0.2 4.56 <2 <5 <0.5 <1 <5 <1 8.77 <20 7/27/2016 47.6 4.34 21.9 45.2 <0.5 1420 2.09 208 <1 <0.5 11.3 3.2 1940 67.9 <2 <5 <0.5 <1 <5 <1 13.8 <20 8/16/2017 52.7 4.10 23.5 44.8 <0.5 2110 2.58 228 <1 <0.5 2.3 3.39 2590 <0.2 82.5 <2 <5 0.559 <1 <5 <1 15.7 <20 8/14/2018 49.6 3.36 21.8 46.2 <0.5 202 3.66 218 <1 <0.5 <1 18 256 <0.2 6.82 <2 <5 <0.5 <1 <5 <1 10.5 <20 7/18/2019 58.4 3.89 25.5 49.7 <0.5 204 1.24 260 <1 <0.5 <1 8.5 0.242 <0.2 9.28 <2 <5 <0.5 <1 <5 <1 9.24 <20 7/27/2020 57.0 3.50 25.0 52.0 <0.5 170 1.5 230 <1 <0.5 <1 14 200 <0.2 7.90 <2 <5 <0.5 <1 <5 <1 10.0 <20 8/10/2021 62.3 13.9 43.9 51.3 <0.5 29900 28.5 592 1.25 <0.5 49.0 218 34600 <0.2 1590 8.04 22.4 8.46 2.66 <5 <1 140 152 Site: ACMW-25 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NOZ-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 02/24/2021 9.45 4932.79 10.4 6.39 44.6 0.045 < 0.10 < 0.020 < 0.030 2.42 2.4 04/27/2021 8.33 4933.91 10.7 6.42 45.3 0.047 < 0.05 < 0.020 < 0.030 2.00 1.94 08/11/2021 10.72 4931.52 17.1 6.54 46.5 0.044 < 0.050 < 0.020 < 0.030 1.89 1.85 11/10/2021 10.37 4931.87 15.1 6.22 45.2 0.052 < 0.050 < 0.020 < 0.030 1.60 1.64 Maximum 10.72 4933.91 17.1 6.54 46.5 0.052 < 0.10 < 0.020 < 0.030 2.42 2.40 Minimum 8.33 4931.52 10.4 6.22 44.6 0.044 < 0.050 < 0.020 < 0.030 1.60 1.64 Average 9.72 4932.52 13.3 6.39 45.4 0.047 < 0.063 < 0.020 < 0.030 1.98 1.96 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-25 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 02/24/2021 109 149 8.16 4.89 < 1 < 1 04/27/2021 110 153 8.86 5.29 < 1 < 1 08/11/2021 118 142 8.76 4.9 < 1 < 1 11/10/2021 115 148 8.14 4.84 2.0 < 1 Maximum 118 153 8.9 5.29 2 < 1 Minimum 109 142 8.14 4.84 < 1 < 1 Average 113 148 8.48 4.98 1 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-25 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 8.7 4933.5 13.8 6.41 47.7 0.38 0.049 0.137 0.025 < 0.040 3.13 3.303 13 8.8 4933.4 13.4 6.30 47.8 0.078 0.053 0.026 0.025 1.98 2.056 14 9.5 4932.8 13.2 6.38 46.7 0.053 0.124 0.023 < 0.018 1.68 1.897 15 9.8 4932.4 14.0 6.32 44.3 0.047 0.073 < 0.020 < 0.018 1.50 1.553 16 8.7 4933.5 14.0 6.27 45.1 0.043 0.235 < 0.020 < 0.020 3.59 3.828 17 7.2 4935.1 13.4 6.34 48.2 0.048 0.161 < 0.020 < 0.028 3.14 3.280 18 9.0 4933.2 14.5 6.09 48.9 0.051 0.123 < 0.020 < 0.015 2.68 2.748 19 8.0 4934.3 12.4 6.29 45.6 0.044 0.113 < 0.020 < 0.010 5.06 4.803 20 8.8 4933.4 12.5 6.46 48.1 0.050 0.265 < 0.020 < 0.015 2.06 2.295 21 9.7 4932.5 13.3 6.39 45.4 0.047 < 0.063 < 0.020 < 0.030 1.98 1.958 Maximum 9.8 4935.1 14.5 6.46 48.9 0.38 0.078 0.265 0.026 0.040 5.06 4.803 Minimum 7.2 4932.4 12.4 6.09 44.3 0.38 0.043 0.053 < 0.020 < 0.010 1.50 1.553 Average 8.8 4933.4 13.4 6.32 46.8 0.38 0.051 0.135 0.021 0.022 2.68 2.772 #Tests 10 10 10 10 10 0 1 10 10 10 10 10 10 Site: ACMW-25 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2012 To: 2021 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 125 163 9.0 6.46 3 < 1 13 121 159 10.1 6.51 1 < 1 14 119 158 10.9 7.23 2 < 1 15 111 150 9.6 5.54 < 1 < 1 16 124 182 12.5 6.26 2 2 17 134 179 10.9 8.10 19 < 1 18 120 164 8.0 5.71 39 < 1 19 139 192 12.9 7.52 39 < 1 20 114 157 8.3 5.42 1 < 1 21 113 148 8.5 4.98 1 < 1 Maximum 139 192 12.9 8.10 39 2 Minimum 111 148 8.0 4.98 < 1 < 1 Average 122 165 10.1 6.37 11 1 #Tests 10 10 10 10 0 10 10 0 Site ACMW-25 Nitrate-Nitrogen &Water Level Chlorides 10 4950 50 i 8 4945 40 6 4940 30 J J J E E 4 4935 3 20 2 4930 10 0 4925 0 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 +Nitrate t Water Level Linear(Nitrate) Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 - 0.50 400 0.40 300 0.30 J J 01 � E E 200 0.20 100 0.10 0 0.00 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 t TDS Total P Annual Metal Report ACMW-25 Access Rd. between Neddenriep & Brooke Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/20/2012 14.0 3.46 4.24 12 <10 <20 <1 43.2 <1 <0.5 <1 <20 66.4 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/11/2013 12.4 3.44 3.79 10.8 7/8/2014 13.6 3.26 4.63 11.9 <0.5 <20 <1 40.5 <1 <0.5 <1 2.36 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 3.02 <20 8/18/2015 10.5 2.91 3.72 10.6 <0.5 28.1 <1 33.0 <1 <0.5 <1 <2 20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/27/2016 12.9 3.38 4.47 12.1 <0.5 <20 <1 39.6 <1 <0.5 <1 <2 <20 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/16/2017 13.5 3.30 4.50 11.7 <0.5 <20 <1 42.6 <1 <0.5 1.3 <2 220 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/14/2018 13.1 3.23 4.26 12.5 <0.5 <20 <1 38.9 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/18/2019 13.5 3.16 4.42 12.2 <0.5 <20 <1 50.0 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 3.24 <20 7/27/2020 13.0 3.00 4.20 12.0 <0.5 <20 <1 42.0 <1 <0.5 <1 <2 20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/11/2021 11.4 2.70 3.81 11.1 <0.5 <20 <1 33.4 <1 <0.5 1.34 <2 27.0 <0.2 <2 <2 <5 <0.5 <1 <5 <1 3.64 <20 Site: ACMW-26 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NOZ-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 02/24/21 16.71 4878.89 10.7 6.47 59.6 0.074 2.7 < 0.020 < 0.010 2.28 5.0 04/27/21 8.59 4887.01 9.7 6.46 40.6 0.091 0.370 < 0.020 < 0.030 1.26 1.63 08/11/21 13.94 4881.66 17.0 6.78 58.8 0.088 0.09 < 0.020 0.047 1.20 1.34 11/10/21 14.51 4881.09 14.4 6.35 62.3 0.094 0.082 < 0.020 0.038 1.19 1.31 Maximum 16.71 4887.01 17.0 6.78 62.3 0.094 2.70 < 0.020 0.047 2.28 5.00 Minimum 8.59 4878.89 9.7 6.35 40.6 0.074 0.08 < 0.020 < 0.010 1.190 1.310 Average 13.44 4882.16 13.0 6.52 55.3 0.087 0.811 < 0.020 0.031 1.483 2.320 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-26 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 02/24/21 128 221 21.4 6.66 < 1 < 1 04/27/21 124 168 12.8 10.6 326 67.7 08/11/21 140 169 15.8 6.14 4.1 < 1 11/10/21 148 235 23.1 7.22 < 1 < 1 Maximum 148 235 23.1 10.6 326 67.7 Minimum 124 168 12.8 6.14 < 1 < 1 Average 135 198 18.3 7.66 83.0 17.7 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-26 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 11.4 4884.2 12.4 6.36 62.6 1.0 0.095 0.153 0.023 0.031 1.296 1.481 13 12.7 4882.9 13.4 6.38 65.4 0.107 0.229 0.026 0.026 1.411 2.087 14 13.8 4881.8 13.0 6.46 60.7 0.101 0.160 0.023 0.033 1.777 1.983 15 14.1 4881.5 12.0 6.36 57.4 0.079 0.146 < 0.020 0.020 3.533 3.675 16 12.4 4883.2 13.8 6.44 62.6 0.146 0.270 < 0.020 0.032 1.768 2.058 17 7.8 4887.8 12.8 6.60 74.1 0.205 0.547 0.048 < 0.015 0.420 0.957 18 11.3 4884.3 14.1 6.19 67.4 0.112 0.176 0.024 < 0.036 0.503 0.682 19 8.9 4886.7 11.0 6.33 57.9 0.105 0.345 < 0.020 0.022 0.563 0.925 20 11.6 4884.0 11.8 6.51 63.3 0.105 0.497 < 0.022 0.023 0.689 1.188 21 13.4 4882.2 13.0 6.52 55.3 0.087 0.811 < 0.020 0.031 1.483 2.320 Maximum 14.1 4887.8 14.1 6.60 74.1 1.0 0.205 0.811 0.048 0.036 3.533 3.675 Minimum 7.8 4881.5 11.0 6.19 55.3 1.0 0.079 0.146 < 0.020 < 0.015 0.420 0.682 Average 11.7 4883.9 12.7 6.41 62.7 1.0 0.114 0.333 0.025 0.027 1.344 1.735 #Tests 10 10 10 10 10 0 1 10 10 10 10 10 10 Site: ACMW-26 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 1989 To: 2021 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 137 200 16.3 6.66 7 6 13 149 219 17.0 7.94 6 3 14 150 227 21.3 8.42 7 3 15 164 254 24.1 10.65 4 1 16 160 240 19.0 15.17 32 3 17 160 225 19.5 4.96 179 7 18 139 209 16.3 6.10 6 1 19 141 203 20.8 6.82 55 3 20 131 196 14.7 5.00 21 3 21 135 198 18.3 7.66 83 18 Maximum 164 254 24.1 15.17 179 18 Minimum 131 196 14.7 4.96 4 1 Average 147 217 18.7 7.94 40 5 #Tests 10 10 10 0 10 0 10 10 0 Site ACMW-26 Nitrate-Nitrogen &Water Level Chlorides 10 4895 50 — i 8 4890 40 6 4885 30 J J J E d E 4 4880 3 20 2 4875 10 0 4870 0 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 t Nitrate t Water Level Linear(Nitrate) Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 - 0.50 400 0.40 300 0.30 J J 01 � E E 200 0.20 100 0.10 0 0.00 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 t TDS Total P Annual Metal Report ACMW-26 Access Rd. between Neddenriep & Brooke Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/20/2012 16.1 4.14 4.31 20.6 <10 54.2 <1 47.9 <1 <0.5 <1 <20 54 <0.2 25.9 <2 <5 <2.5 <1 <5 <1 3.16 <10 6/11/2016 12.8 4.25 3.43 19.3 7/8/2014 19.5 5.42 5.57 27.3 <0.5 <20 <1 58.0 <1 <0.5 <1 4.72 26.6 <0.2 80 1.99 <5 <0.5 <1 <5 <1 4.2 <20 8/18/2015 14.0 4.03 4.28 20.3 <0.5 24.6 <1 51.2 <1 <0.5 <1 <2 24.8 <0.2 20.7 <2 <5 <0.5 <1 <5 <1 <3 <20 7/27/2016 15.0 5.76 4.51 21.0 <0.5 <20 <1 44.7 <1 <0.5 <1 3.27 <20 89.4 3.85 <5 <0.5 <1 <5 <1 5.03 <20 8/16/2017 19.4 6.70 5.49 23.9 <0.5 27.9 1.24 69.3 <1 <0.5 <1 2.35 39.9 <0.2 113 2.87 <5 <0.5 <1 <5 <1 11.6 <20 8/14/2018 11.9 4.15 3.52 18.2 <0.5 <20 <1 39.5 <1 <0.5 <1 2.73 21.5 <0.2 213 3.32 <5 <0.5 <1 <5 <1 3.03 <20 7/18/2019 14.3 6.33 4.12 21.0 <0.5 <20 <1 60.0 <1 <0.5 <1 4.05 48.9 <0.2 128 3.12 <5 <0.5 <1 <5 <1 5.28 <20 7/27/2020 11.0 3.60 3.10 16.0 <0.5 <20 <1 35 <1 <0.5 <1 2.50 23.0 <0.2 64.0 2.6 <5 <0.5 <1 <5 <1 <3 <20 8/11/2021 12.6 3.91 3.62 19.7 <0.5 <20 <1 47.7 <1 <0.5 <1 2.27 <10 <0.2 69.2 2.16 <5 <0.5 <1 <5 <1 3.14 <20 DIAMOND VALLEY RANCH MONITORING WELLS Site: ACMW-08N SOUTH TAHOE PUBLIC UTILITY DISTRICT LPINE COUNTY GROUNDWATER QUALITY DA- 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 02/10/21 4.58 5459.87 11.9 6.92 78.4 0.038 < 0.10 < 0.020 < 0.010 0.638 0.64 119 05/20/21 3.52 5460.93 12.1 6.99 70.6 0.039 < 0.050 < 0.020 < 0.010 0.516 0.545 113 08/25/21 4.77 5459.68 13.3 6.98 77.9 0.042 < 0.050 < 0.020 < 0.010 0.625 0.665 126 11/15/21 5.45 5459.00 11.8 6.85 78.9 0.041 < 0.050 < 0.020 < 0.010 0.623 0.605 116 Maximum 5.45 5460.93 13.3 6.99 78.9 0.042 < 0.100 < 0.020 < 0.010 0.638 0.665 126 Minimum 3.52 5459.00 11.8 6.85 70.6 0.038 < 0.050 < 0.020 < 0.010 0.516 0.545 113 Average 4.58 5459.87 12.3 6.94 76.5 0.040 < 0.063 < 0.020 < 0.010 0.601 0.614 119 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-08N SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Coli E. coli Fecal EC Chloride COD SO4 Color chromo chromo Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 02/10/21 162 1.59 0.972 < 1 < 1 05/20/21 150 1.93 0.879 < 1 < 1 08/25/21 161 1.41 0.871 < 1 < 1 11/15/21 161 1.76 1.00 649 < 1 Maximum 162 1.93 1.00 649 1 Minimum 150 1.41 0.87 < 1 < 1 Average 159 1.67 0.93 163.0 1.0 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-08N SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2009 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 09 4.3 5460.2 11.7 6.50 62 53 0.22 0.040 < 0.050 < 0.010 0.361 0.391 10 4.1 5460.3 12.4 6.62 68 0.042 0.127 < 0.010 0.450 0.536 11 4.7 5459.8 12.0 6.90 80 0.04 0.040 < 0.058 < 0.010 0.626 0.693 12 5.7 5458.7 12.0 7.02 81 0.08 0.044 < 0.055 < 0.020 < 0.010 0.744 0.808 13 6.3 5458.2 12.2 6.90 83 0.052 < 0.050 0.022 < 0.010 0.689 0.701 14 6.3 5458.2 12.0 6.98 79 0.039 0.074 0.025 < 0.010 0.672 0.679 15 7.9 5456.6 12.2 6.81 78 0.045 < 0.050 < 0.020 < 0.010 0.643 0.630 16 5.6 5458.9 12.5 6.72 76 0.044 0.067 < 0.020 < 0.010 0.595 0.589 17 3.0 5461.4 12.1 6.97 83 0.046 < 0.073 < 0.020 < 0.010 0.676 0.592 18 4.6 5459.9 12.4 6.75 84 0.041 < 0.296 < 0.020 < 0.200 0.691 0.799 19 3.5 5461.0 11.9 6.75 82 0.039 0.076 < 0.020 < 0.013 0.642 0.632 20 3.8 5460.7 12.0 6.76 80 0.042 0.090 < 0.020 < 0.010 0.624 0.640 21 4.6 5459.9 12.3 6.94 76 0.040 < 0.063 < 0.020 < 0.010 0.601 0.614 Maximum 7.9 5461.4 12.5 7.02 84 53 0.22 0.052 0.296 0.025 < 0.200 0.744 0.808 Minimum 3.0 5456.6 11.7 6.50 62 53 0.04 0.039 < 0.050 0.020 < 0.010 0.361 0.391 Average 4.9 5459.5 12.1 6.81 78 53 0.11 0.043 0.087 0.021 < 0.025 0.616 0.639 #Tests 13 13 13 13 13 1 3 13 13 10 13 13 13 Site: ACMW-08N SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2021 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 09 106 142 5.46 6 1.00 3.5 < 1 First year of sampling 10 110 170 3.35 1.25 2.5 < 1 11 120 164 0.77 1.80 5.4 < 1 12 130 165 0.83 1.46 < 1.0 < 1 13 125 167 0.97 1.48 23.4 < 1 14 112 162 0.91 1.17 6.4 < 1 15 120 163 1.08 1.13 147.4 < 1 16 124 152 1.16 1.07 4.4 < 1 17 126 168 1.20 1.06 262.3 < 1 18 125 174 1.36 1.43 117.9 < 1 19 121 160 1.42 1.13 12.4 6.1 20 117 156 1.50 0.96 1.0 1.0 21 119 159 1.67 0.93 163.0 1.0 Maximum 130 174 5.46 6 1.80 262.3 6.1 Minimum 106 142 0.77 < 6 0.93 < 1.0 < 1.0 Average 119 162 1.67 6 1.22 57.7 < 1.4 #Tests 13 13 13 1 13 0 13 13 0 Site ACMW-08N Nitrate-Nitrogen &Water Level Chlorides 5 5475 40 4 5470 30 3 5465 £ 20 E y 2 5460 3 1 5455 10 0 5450 09 10 11 12 13 14 15 16 17 18 19 20 21 0 09 10 11 12 13 14 15 16 17 18 19 20 21 Nitrate f Water Level Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 0.3 300 J J E E 0.2 200 0.1 100 0 0.0 09 10 11 12 13 14 15 16 17 18 19 20 21 09 10 11 12 13 14 15 16 17 18 19 20 21 TDS Linear(TDS) Total P Linear(Total P) Annual Metal Report ACMW-08N Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/18/2009 13.7 1.50 4.10 9.0 17.2 <20 <2 39 <1 <0.5 <1 <20 43.5 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 8/10/2010 15.0 1.60 5.00 9.5 <0.5 <20 <1 34 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/13/2011 16.7 1.86 5.80 10.8 <0.5 <20 <1 37 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/26/2012 15.6 1.88 5.34 10.2 <10 <20 <1 36.2 <1 <0.5 <1 <20 <50 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 7/10/2013 16.1 1.78 5.60 10.1 7/9/2014 16.0 1.91 5.46 10.5 <0.5 <20 <1 38.2 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/19/2015 14.8 1.64 5.25 9.8 <0.5 <20 <1 36.6 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/10/2016 14.8 1.70 5.21 9.8 <0.5 <20 <1 33.8 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/27/2017 15.7 1.76 5.37 10.1 <0.5 <20 <1 41.2 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/29/2018 16.7 1.58 5.58 10.6 <0.5 <20 <1 40 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/14/2019 16.8 1.63 5.47 10.4 <0.5 <20 <1 39.4 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/8/2020 15.7 1.41 5.27 9.72 <0.5 <20 <1 39.6 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 52.3 8/25/2021 15.3 1.26 4.93 9.3 <0.5 <20 <1 35.8 <1 <0.5 <1 <2 <10 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-09D SOUTH TAHOE PUBLIC UTILITY DISTRICT LLPINE COUNTY GROUNDWATER QUALITY DAT 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 2/17/2021 35.09 5475.47 12.2 6.81 31.5 0.059 < 0.10 < 0.020 < 0.020 0.947 0.95 67 6/3/2021 19.64 5490.92 13.9 6.50 30.8 0.07 < 0.050 < 0.020 < 0.020 0.777 0.752 81 8/25/2021 33.81 5476.75 13.6 6.48 31.9 0.057 < 0.050 < 0.020 < 0.020 0.822 0.850 90 11/18/2021 36.81 5473.75 12.8 6.50 31.9 0.066 < 0.050 < 0.020 < 0.030 0.889 0.832 97 Maximum 36.81 5490.92 13.9 6.81 31.9 0.070 < 0.100 < 0.020 < 0.030 0.947 0.95 97 Minimum 19.64 5473.75 12.2 6.48 30.8 0.057 < 0.050 < 0.020 < 0.020 0.777 0.752 67 Average 31.34 5479.22 13.1 6.57 31.5 0.063 < 0.063 < 0.020 < 0.023 0.859 0.85 84 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-09D SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Coli E. coli Fecal EC Chloride COD SO4 Color chromo chromo Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 2/17/2021 85.3 1.87 2.20 < 1 < 1 6/3/2021 76.6 1.51 2.05 18.7 < 1 8/25/2021 78.8 1.35 2.42 < 1 < 1 11/18/2021 78.2 1.61 2.66 < 1 < 1 Maximum 85.3 1.87 2.66 18.7 < 1.0 Minimum 76.6 1.35 2.05 < 1.0 < 1.0 Average 79.7 1.59 2.33 5.4 < 1.0 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-09D SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2009 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 09 27.4 5483.2 13.1 6.37 32 25 4.43 0.059 0.052 < 0.010 0.865 0.808 10 30.1 5478.7 12.9 6.22 33 0.058 < 0.050 < 0.010 0.870 0.920 11 34.3 5476.2 12.2 6.32 34 0.83 0.057 0.100 < 0.015 1.077 1.167 12 38.7 5471.9 13.1 6.68 32 1.60 0.107 0.121 0.020 < 0.010 0.750 0.880 13 35.4 5475.2 12.7 6.36 32 0.067 < 0.050 0.022 < 0.010 0.701 0.661 14 32.8 5477.7 13.2 6.57 32 0.067 0.060 0.027 < 0.010 0.716 0.722 15 36.9 5473.6 13.3 6.43 31 0.058 < 0.050 < 0.020 < 0.010 0.882 0.741 16 31.5 5479.1 12.6 6.31 33 0.059 < 0.078 < 0.020 < 0.010 0.968 0.798 17 24.6 5486.0 12.8 6.43 32 0.052 0.155 0.024 < 0.045 3.083 3.080 18 32.1 5478.4 12.6 6.17 32 0.058 0.070 0.065 < 0.011 1.318 1.340 19 28.9 5481.6 13.1 6.25 32 0.056 0.318 < 0.020 < 0.020 1.092 1.371 20 30.3 5480.3 12.5 6.63 32 2.10 0.059 0.143 < 0.020 < 0.015 0.870 0.981 21 31.3 5479.2 13.1 6.57 32 0.063 < 0.063 < 0.020 < 0.023 0.859 0.846 Maximum 38.7 5486.0 13.3 6.68 34 25 4.43 0.107 0.318 0.065 < 0.045 3.083 3.080 Minimum 24.6 5471.9 12.2 6.17 31 25 0.83 0.052 < 0.050 0.020 < 0.010 0.701 0.661 Average 31.9 5478.6 12.8 6.41 32 25 2.24 0.063 0.101 0.026 < 0.015 1.081 1.101 #Tests 13 13 13 13 13 1 4 13 13 10 13 13 13 Site: ACMW-09D SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2021 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 09 81 79 1.37 < 5 2.29 5.0 2.8 First year of sampling 10 79 81 1.28 2.59 5.2 2.3 11 84 85 1.61 2.78 < 1.0 < 1.0 12 87 79 1.39 2.83 < 1.0 < 1.0 13 83 76 1.35 3.26 < 1.0 < 1.0 14 80 76 1.41 3.57 < 1.0 < 1.0 15 82 81 1.41 3.56 < 1.0 < 1.0 16 83 79 1.48 3.45 130.1 < 1.0 17 95 97 1.58 3.55 176.8 < 1.0 18 87 81 1.37 2.66 56.1 < 1.0 19 83 83 1.62 2.61 6.2 < 1.0 20 77 79 1.29 2.16 < 1.0 < 1.0 21 84 80 1.59 2.33 5.4 < 1.0 Maximum 95 97 1.62 5 3.57 176.8 2.8 Minimum 77 76 1.28 < 5 2.16 < 1.0 < 1.0 Average 83 81 1.44 5 2.90 30.0 1.2 #Tests 13 13 13 1 13 0 13 13 0 Site ACMW-09D Nitrate-Nitrogen &Water Level Chlorides 5 5495 50 4 5490 40 5485 s A. 30 J d J rn 5480 E E 2 20 5475 1 5470 10 0 1 5465 0 09 10 11 12 13 14 15 16 17 18 19 20 21 09 10 11 12 13 14 15 16 17 18 19 20 21 Nitrate f Water Level Linear(Nitrate) Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 0.3 300 J J E E 0.2 200 0.1 100 0 0.0 09 10 11 12 13 14 15 16 17 18 19 20 21 09 10 11 12 13 14 15 16 17 18 19 20 21 TDS Linear(TDS) Total P Linear(Total P) Annual Metal Report ACM W-09D Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/18/2009 6.20 0.951 1.70 6.48 16.6 760 2.48 27 <1 <0.5 <1 <20 632 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 14.5 7/8/2010 7.30 <1 2.00 6.80 <0.5 570 <1 28 <1 <0.5 <1 <2 690 <0.2 14 <2 <5 0.54 <1 <5 <1 <3 <20 7/13/2011 6.85 1 1.78 7.89 <0.5 132 <1 23.4 <1 <0.5 <1 <2 85.1 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/26/2012 6.16 0.91 1.17 7.54 <10 79.6 <1 21.3 <1 <0.5 <1 <20 170 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 8/1/2014 6.34 <1 1.74 7.15 <0.5 105 1.74 21.2 <1 <0.5 <1 <2 296 <0.2 5.62 <2 <5 <0.5 <1 <5 <1 <3 <20 6/11/2015 6.30 1.12 1.70 7.74 <0.5 102 1.95 16.4 <1 <0.5 <1 <2 231 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/16/2016 6.22 <1 1.69 7.68 <0.5 95.8 1.01 21.1 <1 0.671 <1 <2 35.4 <0.2 <2 <2 <5 0.618 <1 <5 <1 <3 <20 6/8/2017 7.85 <1 2.17 7.11 <0.5 106 <1 24.4 <1 <0.5 <1 <2 46.1 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 9/18/2018 6.56 <1 1.68 7.94 <0.5 203 <1 18 <1 <0.5 <1 <2 241 <0.2 <2 <2 <5 <0.5 <1 <5 <1 6/6/2019 6.43 <1.0 1.63 7.35 <0.5 124 <1 17.8 <1 <0.5 <1 <2 125 <0.2 2.06 <2 <5 <0.5 <1 <5 <1 <3 <20 6/13/2020 6.12 <1.0 1.55 6.68 <0.5 296 <1 17.9 <1 <0.5 <1 <2 242 <0.2 5.20 <2 <5 <0.5 <1 <5 <1 <3 <20 8/25/2021 5.98 <1.0 1.47 7.21 <0.5 162 <1 16.5 <1 <0.5 1.07 <2 102 <0.2 <2 <2 <5 <0.5 <1 <5 <1 4.28 <20 Site: ACMW-10 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NOZ-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 2/17/2021 29.82 5504.37 11.9 6.70 69.7 0.038 < 0.10 < 0.020 < 0.020 1.29 1.3 6/3/2021 22.84 5511.35 12.9 6.54 86.7 0.042 < 0.050 < 0.020 < 0.020 0.299 0.301 8/25/2021 30.18 5504.01 12.5 6.56 61.5 0.035 < 0.050 < 0.020 < 0.020 2.59 2.63 11/18/2021 32.10 5502.09 12.1 6.54 69.1 0.048 < 0.050 < 0.020 < 0.030 1.96 1.76 Maximum 32.10 5511.35 12.9 6.70 86.7 0.048 < 0.100 < 0.020 < 0.030 2.590 2.63 Minimum 22.84 5502.09 11.9 6.54 61.5 0.035 < 0.050 < 0.020 < 0.020 0.299 0.301 Average 28.74 5505.46 12.4 6.59 71.8 0.041 < 0.063 < 0.020 < 0.023 1.535 1.498 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-10 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Coli E. coli Fecal TDS EC Chloride COD SO4 Color Chromo Chromo Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 2/17/2021 131 170 6.19 5.10 < 1 < 1 6/3/2021 131 192 3.70 2.77 < 1 < 1 8/25/2021 127 174 5.61 6.47 < 1 < 1 11/18/2021 143 183 5.66 6.59 < 1 < 1 Maximum 143 192 6.19 6.59 < 1 < 1 Minimum 127 170 3.70 2.77 < 1 < 1 Average 133 180 5.29 5.23 < 1 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-10 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2009 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 09 26.1 5508.1 11.8 6.46 113 100 1.51 0.044 < 0.050 < 0.010 0.141 0.171 10 25.7 5505.9 12.1 6.39 97 0.046 < 0.050 < 0.010 0.148 0.198 11 30.0 5504.2 10.8 6.52 85 0.044 < 0.050 < 0.010 0.145 0.218 12 34.3 5499.9 12.7 6.47 91 1.20 0.212 0.122 < 0.020 < 0.010 0.113 0.245 13 31.4 5502.8 12.0 6.43 82 0.035 0.056 < 0.020 < 0.010 0.150 0.156 14 30.7 5503.4 12.6 6.53 72 0.040 0.079 0.030 < 0.010 0.231 0.280 15 33.4 5500.8 13.1 6.36 76 0.040 < 0.050 < 0.020 < 0.010 0.260 0.257 16 29.1 5505.1 12.8 6.34 74 0.039 < 0.078 < 0.020 < 0.010 0.798 0.784 17 26.2 5508.0 12.3 6.55 77 0.040 < 0.080 0.022 < 0.010 0.442 0.377 18 29.4 5504.7 12.6 6.28 77 0.039 < 0.091 0.020 < 0.008 0.461 0.495 19 23.9 5510.3 12.4 6.30 78 0.036 0.293 < 0.020 < 0.013 0.721 0.915 20 27.0 5507.2 12.1 6.51 73 0.50 0.041 0.160 < 0.020 < 0.015 1.012 1.122 21 28.7 5505.5 12.4 6.59 72 0.041 < 0.063 < 0.020 < 0.023 1.535 1.498 Maximum 34.3 5510.3 13.1 6.59 113 100 1.51 0.212 0.293 0.030 < 0.023 1.535 1.498 Minimum 23.9 5499.9 10.8 6.28 72 100 0.50 0.035 < 0.050 < 0.020 < 0.008 0.113 0.156 Average 28.9 5505.1 12.3 6.44 82 100 1.07 0.053 0.094 0.021 < 0.011 0.474 0.517 #Tests 13 13 13 13 13 1 3 13 13 10 13 13 13 Site: ACMW-10 SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2021 Total Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 09 162 248 5.28 < 5 3.42 < 1.0 < 1.0 First year of sampling 10 145 208 4.91 3.60 < 1.0 < 1.0 11 131 190 4.99 3.43 < 2.4 < 1.0 12 153 193 4.48 2.54 < 1.0 < 1.0 13 124 176 4.03 2.31 < 1.0 < 1.0 14 114 159 4.51 3.35 < 1.0 < 1.0 15 129 175 4.56 2.88 < 1.0 < 1.0 16 128 169 4.96 3.30 < 1.0 < 1.0 17 116 168 4.51 4.53 < 1.0 < 1.0 18 134 230 4.61 4.11 < 1.0 < 1.0 19 133 181 4.64 4.62 < 1.0 < 1.0 20 125 175 4.80 4.47 < 1.0 < 1.0 21 133 180 5.29 5.23 < 1.0 < 1.0 Maximum 162 248 5.29 < 5 5.23 < 2.4 < 1.0 Minimum 114 159 4.03 < 5 2.31 < 1.0 < 1.0 Average 133 189 4.74 < 5 3.68 < 1.1 < 1.0 #Tests 13 13 13 1 13 0 13 13 0 Site ACMW-10 Nitrate-Nitrogen &Water Level Chlorides 1.2 5515 50 1.0 5510 40 0.8 5505 d 30 J N J a6 0.6 J rn E `m E 5500 3 20 0.4 0.2 5495 10 0.0 5490 0 09 10 11 12 13 14 15 16 17 18 19 20 21 09 10 11 12 13 14 15 16 17 18 19 20 21 Nitrate f Water Level Linear(Nitrate) --4--Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 0.3 300 J J E E 0.2 200 0.1 100 0 0.0 09 10 11 12 13 14 15 16 17 18 19 20 21 09 10 11 12 13 14 15 16 17 18 19 20 21 TDS Linear(TDS) Total P Linear(Total P) Annual Metal Report ACMW-10 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/18/2009 35.1 1.46 7.51 10.4 21.5 130 <2 31 <1 <0.5 <5 <20 137 <0.2 <20 2.9 <5 <2.5 <1 <5 <1 <3 <10 7/8/2010 24.0 <1 6.40 7.50 <0.5 330 <1 27 <1 <0.5 <1 <2 580 <0.2 20 <2 <5 <0.5 <1 <5 <1 <3 <20 7/26/2012 20.4 1.22 6.05 9.11 <10 324 <1 34.7 <1 <0.5 <1 <20 135 <0.2 <20 <2 <5 <1 <5 <1 <3 <10 8/1/2014 18.8 1.16 5.30 8.58 <0.5 <20 <1 30 <1 <0.5 <1 <2 24.1 <0.2 2.71 <2 <5 <0.5 <1 <5 <1 <3 <20 6/11/2015 16.5 <1 4.84 7.88 <0.5 <20 <1 30.7 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/16/2016 17.1 <1 5.08 7.62 <0.5 51.2 <1 26.9 <1 <0.5 <1 <2 85 <0.2 3.2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/8/2017 17.9 <1 5.67 6.89 <0.5 827 <1 32.4 <1 <0.5 <1 <2 1320 <0.2 35.7 <2 <5 <0.5 <1 <5 <1 3.9 <20 9/18/2018 19.6 <1 5.49 8.28 <0.5 <20 <1 33.4 <1 <0.5 <1 <2 <20 <0.2 4.1 <2 <5 <0.5 <1 <5 <1 6/6/2019 18.9 <1.0 5.55 7.87 <0.5 440 <1 31.7 <1 <0.5 <1 <2 609 <0.2 18.8 <2 <5 <0.5 <1 <5 <1 <3 <20 6/13/2020 21.3 <1.0 5.85 8.63 <0.5 128 <1 38.9 <1 <0.5 <1 <2 215 <0.2 7.45 <2 <5 <0.5 <1 <5 <1 <3 <20 8/25/2021 18.2 <1.0 4.92 7.67 <0.5 36.5 <1 29.6 <1 <0.5 <1 <2 30 <0.2 <2 <2 <5 <0.5 <1 <5 <1 3.96 <20 Site: ACMW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT \LPINE COUNTY GROUNDWATER QUALITY DAT 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 2/17/2021 19.63 5483.38 9.8 6.53 32.9 0.025 0.180 < 0.020 < 0.020 0.750 0.93 71 6/3/2021 13.60 5489.41 11.7 6.59 34.9 0.021 < 0.050 < 0.020 < 0.020 0.621 0.613 72 8/25/2021 21.03 5481.98 12.5 6.32 35.0 0.024 < 0.050 < 0.020 < 0.020 0.673 0.695 80 11/18/2021 23.37 5479.64 11.9 6.30 34.6 0.027 < 0.050 < 0.020 < 0.030 0.685 0.670 72 Maximum 23.37 5489.41 12.5 6.59 35.0 0.027 0.18 < 0.020 < 0.030 0.75 0.93 80 Minimum 13.60 5479.64 9.8 6.30 32.9 0.021 < 0.050 < 0.020 < 0.020 0.621 0.613 71 Average 19.41 5483.60 11.5 6.44 34.4 0.024 0.083 < 0.020 < 0.023 0.68 0.73 74 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Coli E. coli Fecal EC Chloride COD SO4 Color chromo chromo Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 2/17/2021 90.4 2.52 4.16 < 1 < 1 6/3/2021 91.4 2.74 2.86 < 1 < 1 8/25/2021 92.4 2.57 3.07 < 1 < 1 11/18/2021 89.6 2.40 3.65 < 1 < 1 Maximum 92 2.74 4.16 < 1 < 1 Minimum 89.6 2.40 2.86 < 1 < 1 Average 91 2.56 3.44 < 1 < 1 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2009 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 09 19.6 5485.4 11.4 6.10 40 36 1.23 0.026 < 0.050 < 0.010 0.258 0.290 10 17.2 5483.6 11.4 5.95 35 0.031 < 0.050 < 0.010 0.422 0.472 11 23.7 5479.3 9.7 6.14 41 3.60 0.016 0.117 < 0.010 0.366 0.450 12 27.1 5475.9 11.1 6.60 32 1.50 0.123 0.207 0.021 < 0.010 0.554 0.771 13 23.2 5479.8 11.3 6.24 30 0.023 0.053 0.023 < 0.010 1.767 1.647 14 20.7 5482.3 13.6 6.27 28 0.029 0.138 0.032 < 0.025 2.773 2.873 15 24.9 5478.1 9.7 6.29 28 0.018 0.050 < 0.020 < 0.020 1.278 1.135 16 18.3 5484.7 12.8 6.17 26 0.021 0.190 < 0.020 < 0.030 2.931 2.642 17 15.6 5487.4 12.3 6.39 33 0.022 0.670 < 0.023 < 0.020 1.072 1.635 18 19.9 5483.1 11.8 6.08 35 0.019 0.140 < 0.020 < 0.011 2.920 3.063 19 17.0 5486.0 11.9 6.11 36 0.019 < 0.075 < 0.020 < 0.018 2.284 2.224 20 18.3 5484.8 12.1 7.05 36 2.10 0.024 < 0.105 < 0.020 < 0.010 1.476 1.518 21 19.4 5483.6 11.5 6.44 34 0.024 0.083 < 0.020 < 0.023 0.682 0.727 Maximum 27.1 5487.4 13.6 7.05 41 36 3.60 0.123 0.670 0.032 0.030 2.931 3.063 Minimum 15.6 5475.9 9.7 5.95 26 36 1.23 0.016 < 0.050 0.020 < 0.010 0.258 0.290 Average 20.4 5482.6 11.6 6.29 33 36 2.11 0.030 0.148 0.022 0.016 1.445 1.496 #Tests 13 13 13 13 13 1 4 13 13 10 13 13 13 Site: ACMW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2021 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 09 68 93 1.63 < 5 1.85 < 1.0 < 1.0 First year of sampling 10 63 83 1.45 2.39 < 1.0 < 1.0 11 67 90 1.71 2.37 < 1.0 < 1.0 12 140 79 1.71 2.60 < 1.0 < 1.0 13 69 83 1.95 3.06 < 1.0 < 1.0 14 75 94 3.17 4.55 < 1.0 < 1.0 15 66 82 1.95 4.40 1.0 < 1.0 16 69 92 2.27 4.47 < 1.0 < 1.0 17 65 82 1.74 3.47 < 1.0 < 1.0 18 85 138 2.28 3.72 < 1.0 < 1.0 19 78 112 2.93 5.57 < 1.0 < 1.0 20 77 101 1.93 4.76 < 1.0 < 1.0 21 74 91 2.56 3.44 < 1.0 < 1.0 Maximum 140 138 3.17 5 5.57 1.0 < 1.0 Minimum 63 79 1.45 < 5 1.85 < 1.0 < 1.0 Average 77 94 2.10 5 3.59 < 1.0 < 1.0 #Tests 13 13 13 1 13 0 13 13 0 Site ACMW-11 Nitrate-Nitrogen &Water Level Chlorides 5 5495 50 4 5490 40 3 EL 5485 d 30 J Ay J � J � E d E 2 5480 20 1 5475 10 0 1 5470 0 09 10 11 12 13 14 15 16 17 18 19 20 21 09 10 11 12 13 14 15 16 17 18 19 20 21 t Nitrate t Water Level Linear(Nitrate) Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 0.3 300 J J E E 0.2 200 0 100 .1 0 0.0 09 10 11 12 13 14 15 16 17 18 19 20 21 09 10 11 12 13 14 15 16 17 18 19 20 21 TDS Linear(TDS) Total P Linear(Total P) Annual Metal Report ACMW-11 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 7/15/2009 8.80 1.30 2.50 4.50 <0.5 <20 <2 25 <1 <0.5 <1 <2 <50 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/8/2010 7.70 1.30 2.40 4.40 <0.5 600 <1 29 <1 <0.5 <1 <2 840 <0.2 19 <2 <5 <0.5 <1 <5 <1 <3 <20 7/13/2011 8.64 1.25 2.58 4.67 <0.5 258 <1 27.2 <1 <0.5 <1 <2 210 <0.2 6.52 <2 <5 <0.5 <1 <5 <1 <3 <20 7/26/2012 7.27 1.28 1.92 4.50 <10 49.8 <1 21.6 <1 <0.5 <1 <20 80.5 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 8/1/2014 12.1 1.78 3.39 6.54 <0.5 <20 <1 39.8 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/11/2015 8.62 1.31 2.60 4.71 <0.5 188 1.59 22.3 <1 <0.5 <1 <2 253 <0.2 4.4 <2 <5 <0.5 <1 <5 <1 <3 <20 8/16/2016 6.20 1.28 1.77 4.91 <0.5 145 <1 20.7 <1 <0.5 <1 <2 123 <0.2 3.19 <2 <5 <0.5 <1 <5 <1 <3 <20 6/8/2017 7.07 1.02 2.14 4.07 <0.5 30.4 <1 21.6 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 9/18/2018 10.6 1.16 2.98 5.42 <0.5 148 <1 34.1 <1 <0.5 <1 <2 163 <0.2 5.06 <2 <5 <0.5 <1 <5 <1 6/6/2019 7.23 <1.0 2.01 4.39 <0.5 26.2 <1 19.7 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/13/2020 10.9 1.08 2.96 5.49 <0.5 122 <1 31.6 <1 <0.5 <1 <2 99.0 <0.2 4.22 <2 <5 <0.5 <1 <5 <1 <3 <20 8/25/2021 8.61 <1.0 2.37 5.06 <0.5 157 <1 26.1 <1 <0.5 <1 <2 105 <0.2 3.52 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT ,LPINE COUNTY GROUNDWATER QUALITY DAT 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 2/10/2021 32.21 5492.83 11.9 6.68 46.5 0.028 < 0.100 < 0.020 < 0.010 0.601 0.60 95 5/20/2021 25.92 5499.12 11.0 6.80 45.9 0.030 0.065 < 0.020 < 0.010 0.623 0.688 89 8/18/2021 33.23 5491.81 11.6 6.38 45.8 0.041 < 0.050 < 0.020 < 0.010 0.635 0.664 88 11/15/2021 33.20 5491.84 11.8 6.66 46.6 0.034 < 0.050 < 0.020 < 0.010 0.656 0.636 88 Maximum 33.23 5499.12 11.9 6.80 46.6 0.041 < 0.100 < 0.020 < 0.010 0.656 0.688 95 Minimum 25.92 5491.81 11.0 6.38 45.8 0.028 < 0.050 < 0.020 < 0.010 0.601 0.600 88 Average 31.14 5493.90 11.6 6.63 46.2 0.033 0.066 < 0.020 < 0.010 0.629 0.647 90 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Coli E. coli Fecal EC Chloride COD SO4 Color chromo chromo Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 2/10/2021 110 2.03 2.26 < 1 < 1 5/20/2021 110 2.11 2.21 < 1 < 1 8/18/2021 102 2.19 2.32 < 1 < 1 11/15/2021 109 2.32 2.31 < 1 < 1 Maximum 110 2.32 2.32 < 1 < 1 Minimum 102 2.03 2.21 < 1 < 1 Average 108 2.16 2.28 < 1 < 1 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2009 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 09 30.9 5494.1 12.3 6.82 64 60 0.30 0.034 < 0.050 < 0.010 0.774 0.804 10 30.7 5492.0 11.9 6.59 61 0.034 < 0.050 < 0.010 0.713 0.763 11 33.1 5491.9 11.5 6.70 57 0.21 0.032 < 0.058 < 0.010 0.602 0.669 12 34.9 5490.1 11.1 6.89 52 0.04 0.036 0.081 0.024 < 0.010 0.588 0.678 13 30.9 5494.2 11.5 6.83 53 0.053 0.232 0.023 < 0.010 0.553 0.758 14 30.8 5494.2 11.9 6.81 51 0.034 0.072 0.025 < 0.010 0.557 0.585 15 33.9 5491.1 12.1 6.63 50 0.041 < 0.050 < 0.020 < 0.010 0.558 0.551 16 27.9 5497.2 12.0 6.55 51 0.041 < 0.063 < 0.020 < 0.010 0.468 0.440 17 25.5 5499.5 11.9 6.73 49 0.048 < 0.075 0.021 < 0.010 0.353 0.293 18 29.0 5496.1 11.8 6.57 47 0.036 < 0.068 < 0.020 < 0.013 0.378 0.399 19 27.3 5497.7 10.9 6.68 47 0.034 0.080 < 0.020 < 0.010 0.411 0.424 20 30.2 5494.9 11.7 6.71 47 0.034 0.088 < 0.020 < 0.010 0.470 0.467 21 31.1 5493.9 11.6 6.63 46 0.033 0.066 < 0.020 < 0.010 0.629 0.647 Maximum 34.9 5499.5 12.3 6.89 64 60 0.30 0.053 < 0.232 0.025 < 0.013 0.774 0.804 Minimum 25.5 5490.1 10.9 6.55 46 60 0.04 0.032 < 0.050 0.020 < 0.010 0.353 0.293 Average 30.5 5494.4 11.7 6.70 52 60 0.18 0.038 < 0.079 0.021 < 0.010 0.542 0.575 #Tests 13 13 13 13 13 1 3 13 13 10 13 13 13 Site: ACMW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 2009 To: 2021 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 09 114 142 1.89 7 4.26 < 1.0 < 1.0 First year of sampling 10 108 138 1.64 3.90 < 1.0 < 1.0 11 103 130 1.53 3.50 < 1.0 < 1.0 12 107 119 1.53 3.29 < 1.0 < 1.0 13 105 119 1.48 3.14 < 1.0 < 1.0 14 99 115 1.58 2.92 < 1.0 < 1.0 15 100 119 1.63 2.70 < 1.0 < 1.0 16 104 ill 1.70 2.65 < 1.0 < 1.0 17 96 106 1.65 2.58 < 1.0 < 1.0 18 96 107 1.65 2.65 < 1.0 < 1.0 19 89 109 1.66 2.42 < 1.0 < 1.0 20 78 105 1.77 2.35 < 1.0 < 1.0 21 90 108 2.16 2.28 < 1.0 < 1.0 Maximum 114 142 2.16 7 4.26 < 1.0 < 1.0 Minimum 78 105 1.48 7 2.28 < 1.0 < 1.0 Average 99 117 1.68 7 2.97 < 1.0 < 1.0 #Tests 13 13 13 1 13 0 13 13 0 Site ACMW-12 Nitrate-Nitrogen &Water Level Chlorides 5 5505 50 4 5500 40 3 5495 y 30 J y J � J � E `m E 2 5490 3 20 1 5485 10 0 5480 0 09 10 11 12 13 14 15 16 17 18 19 20 21 09 10 11 12 13 14 15 16 17 18 19 20 21 t Nitrate T Water Level Linear(Nitrate) Chloride Total Dissolved Solids JDS) Total Phosphorus 500 0.4 400 0.3 300 J J E E 0.2 200 0.1 100 0 0.0 09 10 11 12 13 14 15 16 17 18 19 20 21 09 10 11 12 13 14 15 16 17 18 19 20 21 �TDS Total P Annual Metal Report ACMW-12 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/18/2009 15.5 1.9 4.04 5.75 <10 22 <2 21 <1 <0.5 <1 <20 81.7 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 7/8/2010 16.0 1.40 4.00 4.90 <0.5 <20 <1 21 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/13/2011 15.0 1.56 3.81 4.79 <0.5 <20 <1 19.2 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/26/2012 12.9 1.51 3.27 4.56 <10 <20 <1 19.4 <1 <0.5 <1 <20 <50 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 7/10/2013 13.0 1.37 3.25 4.46 7/9/2014 13.5 1.59 3.66 4.82 <0.5 <20 <1 23 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/19/2015 12.7 1.28 3.62 4.58 <0.5 <20 <1 22.1 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/10/2016 12.1 1.32 3.52 4.52 <0.5 <20 <1 22.3 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/27/2017 11.0 1.27 3.15 4.12 <0.5 <20 <1 20.8 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/29/2018 11.4 1.09 3.19 4.26 <0.5 <20 <1 22.7 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/14/2019 11.5 1.19 3.18 4.39 <0.5 <20 <1 22.1 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/8/2020 11.3 <1.0 3.27 4.14 <0.5 <22 <1 23.0 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/18/2021 11.5 1.08 3.36 4.47 <0.5 48 <1 29.7 <1 <0.5 <1 <2 24.5 <0.2 <2 <2 5.30 <0.5 <1 <5 <1 <3 <20 Site: ACMW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT ACMW-1 ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 2/10/2021 11.00 5543.55 9.8 6.23 50.9 0.018 < 0.10 < 0.020 < 0.030 1.57 1.6 116 5/20/2021 10.09 5544.46 9.2 6.38 50.6 0.021 0.06 < 0.020 < 0.030 1.28 1.34 91 8/25/2021 12.44 5542.11 12.6 6.40 50.4 0.024 0.06 < 0.020 < 0.010 1.25 1.31 99 11/15/2021 12.61 5541.94 12.8 6.16 51.1 0.024 < 0.050 < 0.020 < 0.010 0.951 0.951 86 Maximum 12.61 5544.46 12.8 6.40 51.1 0.024 0.10 < 0.020 < 0.030 1.57 1.60 116 Minimum 10.09 5541.94 9.2 6.16 50.4 0.018 < 0.050 < 0.020 < 0.010 0.95 0.95 86 Average 11.54 5543.02 11.1 6.29 50.8 0.022 0.068 < 0.020 < 0.020 1.26 1.30 98 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: 3 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Coli E. coli Fecal EC Chloride COD SO4 Color Chromo Chromo Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 2/10/2021 127 2.70 2.74 < 1 < 1 5/20/2021 123 2.24 2.43 < 1 < 1 8/25/2021 122 2.12 2.83 < 1 < 1 11/15/2021 124 2.07 2.30 < 1 < 1 Maximum 127 2.70 2.83 < 1 < 1 Minimum 122 2.07 2.30 < 1 < 1 Average 124 2.28 2.58 < 1 < 1 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 10.9 5543.6 10.6 6.15 42 54.80 0.550 0.089 0.023 < 0.010 0.113 0.212 13 10.4 5544.1 8.7 6.45 40 0.658 0.135 0.027 0.014 0.092 0.223 14 11.3 5543.3 10.2 6.38 37 0.419 0.098 0.027 < 0.010 0.045 0.135 15 12.5 5542.1 10.7 6.21 38 0.025 0.068 < 0.020 < 0.010 0.050 0.115 16 10.8 5543.8 10.4 6.07 39 0.026 0.087 < 0.020 < 0.010 0.068 0.154 17 9.5 5545.1 9.5 6.34 46 0.024 0.080 0.022 < 0.010 0.395 0.412 18 11.2 5543.3 10.2 6.16 52 0.035 < 0.063 < 0.020 < 0.013 1.205 1.178 19 9.9 5544.6 9.8 6.21 51 0.025 0.138 < 0.020 < 0.018 2.578 2.658 20 12.0 5542.6 11.3 6.27 51 0.023 0.098 < 0.020 < 0.025 2.060 2.090 21 11.5 5543.0 11.1 6.29 51 0.022 0.068 < 0.020 < 0.020 1.263 1.300 Maximum 12.5 5545.1 11.3 6.45 52 54.80 0.658 0.138 0.027 0.025 2.578 2.658 Minimum 9.5 5542.1 8.7 6.07 37 54.80 0.022 0.063 0.020 < 0.010 0.045 0.115 Average 11.0 5543.5 10.2 6.25 45 54.80 0.181 0.092 0.022 0.014 0.787 0.848 #Tests 10 10 10 10 10 0 1 10 10 10 10 10 10 Site: ACMW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 2012 To: 2021 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 109 90 1.40 2.24 1 < 1 First year of sampling 13 145 86 1.38 2.62 < 1 < 1 14 98 80 1.36 2.23 < 1 < 1 15 103 88 1.42 2.06 < 1 < 1 16 110 86 1.60 2.30 < 1 < 1 17 115 103 2.12 2.38 < 1 < 1 18 119 122 2.23 2.99 < 1 < 1 19 120 147 5.34 2.69 < 1 < 1 20 105 137 4.30 2.91 < 1 < 1 21 98 124 2.28 2.58 < 1 < 1 Maximum 145 147 5.34 2.99 1 < 1 Minimum 98 80 1.36 2.06 < 1 < 1 Average 112 106 2.34 2.50 1 < 1 #Tests 10 10 10 0 10 0 10 10 0 Site ACMW-13 Nitrate-Nitrogen &Water Level Chlorides 3.0 5550 50 2.5 Ilk 5545 40 2.0 5540 30 J d J rn 1.5 E ° E 5535 20 1.0 5530 10 0.5 0.0 5525 0 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 Nitrate t Water Level Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 1.0 400 0.8 300 0.6 J J E 200 0.4 100 0.2 0 0.0 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 TDS Linear(TDS) Total P Linear(Total P) Annual Metal Report ACMW-13 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/19/2012 9.07 2.30 2.90 5.36 <10 3500 <1 55.9 <1 <0.5 1.24 <20 3840 <0.2 106 <2 <5 <2.5 <1 <5 <1 6.03 18.5 7/10/2013 4.85 6.92 6.47 5.70 7/9/2014 7.80 2.08 2.71 4.90 <0.5 387 1.43 34.5 <1 <0.5 1.01 <2 3610 <0.2 30.6 <2 <5 <0.5 <1 <5 <1 <3 <20 8/19/2015 9.57 5.62 6.44 5.62 <0.5 13000 1.92 176 <1 <0.5 11.5 11.8 22700 <0.2 497 <2 5.93 5.3 <1 <5 <1 29.3 48.2 8/10/2016 8.22 2.43 3.08 4.89 <0.5 3810 <1 62.4 <1 <0.5 3.98 4.34 5260 <0.2 110 <2 <5 1.26 <1 <5 <1 8.06 <20 7/27/2017 11.2 2.90 4.19 5.59 <0.5 6060 1.01 91.1 <1 <0.5 5.1 4.95 7860 <0.2 170 <2 <5 1.99 <1 <5 <1 13.3 26.8 8/29/2018 13.4 2.47 4.16 6.71 <0.5 3840 <1 65.5 <1 <0.5 2.61 3.96 4860 <0.2 99.3 <2 <5 1.28 <1 <5 <1 7.37 <20 8/14/2019 17.0 3.89 6.41 7.56 <0.5 15200 2.88 183 <1 <0.5 8.88 9.42 17200 <0.2 450 <2 <5 4.95 <1 <5 <1 44 58.4 8/8/2020 15.3 4.41 6.78 7.25 <0.5 16000 2.66 175 <1 <0.5 7.27 8.23 19800 <0.2 437 <2 <5 4.74 <1 <5 <1 33.2 49.9 8/25/2021 12.2 1.62 3.28 6.68 <0.5 1000 <1 43.8 <1 <0.5 1.70 <2 1320 <0.2 26.9 <2 <5 <0.5 <1 <5 <1 3.05 <20 Site: ACMW-14 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NOZ-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 02/17/2021 15.11 5532.09 10.1 6.28 32.3 0.021 0.24 < 0.020 < 0.010 0.107 0.35 70 06/30/2021 14.81 5532.39 11.5 6.16 34.1 0.019 < 0.050 < 0.020 < 0.010 0.089 0.097 64 08/25/2021 18.17 5529.03 12.1 6.05 36.2 0.022 < 0.050 < 0.020 < 0.010 0.143 0.155 75 11/18/2021 18.00 5529.20 12.2 6.19 34.1 0.032 0.451 < 0.020 < 0.010 0.150 0.601 83 Maximum 18.17 5532.39 12.2 6.28 36.2 0.032 0.451 < 0.020 < 0.010 0.150 0.60 83 Minimum 14.81 5529.03 10.1 6.05 32.3 0.019 < 0.050 < 0.020 < 0.010 0.089 0.097 64 Average 16.52 5530.68 11.5 6.17 34.2 0.024 0.198 < 0.020 < 0.010 0.122 0.301 73 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-14 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Coli E. coli Fecal EC Chloride COD SO4 Color Chromo Chromo Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 02/17/2021 73.5 1.04 1.40 2.0 < 1 06/30/2021 71.9 0.863 1.55 6.3 1.0 08/25/2021 77.3 0.986 1.54 4.1 < 1 11/18/2021 76.4 1.47 2.43 83.9 < 1 Maximum 77.3 1.47 2.43 83.9 1.0 Minimum 71.9 0.863 1.40 2.0 < 1 Average 74.8 1.09 1.73 24.1 1.0 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-14 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 19.3 5527.9 10.8 6.12 42 0.75 0.042 0.054 0.023 < 0.010 0.475 0.539 13 18.2 5529.0 10.8 6.20 37 0.056 0.052 0.025 < 0.012 0.706 0.698 14 19.5 5527.7 11.2 6.29 37 0.044 0.078 0.026 < 0.010 0.429 0.497 15 21.0 5526.2 11.4 6.23 38 0.042 < 0.050 < 0.020 < 0.010 0.565 0.568 16 18.4 5528.8 11.5 6.02 31 0.021 0.111 < 0.020 < 0.028 1.510 1.560 17 16.6 5530.6 10.7 6.03 24 0.022 1.123 0.023 < 0.140 9.225 10.338 18 16.5 5530.7 11.4 5.85 28 0.023 0.103 < 0.020 < 0.011 1.132 1.192 19 15.1 5532.1 12.5 5.88 26 0.024 < 0.076 < 0.020 < 0.020 0.980 0.961 20 16.5 5530.7 12.3 6.10 32 0.024 0.195 < 0.020 < 0.010 0.222 0.362 21 16.5 5530.7 11.5 6.17 34 0.024 0.198 < 0.020 < 0.010 0.122 0.301 Maximum 21.0 5532.1 12.5 6.29 42 0.75 0.056 1.123 0.026 0.140 9.225 10.338 Minimum 15.1 5526.2 10.7 5.85 24 0.75 0.021 0.050 0.020 < 0.010 0.122 0.301 Average 17.8 5529.4 11.4 6.09 33 0.75 0.032 0.204 0.022 0.026 1.536 1.701 #Tests 10 10 10 10 10 0 1 10 10 10 10 10 10 Site: ACMW-14 SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 2012 To: 2021 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 77 94 1.25 1.95 1 < 1 First year of sampling 13 71 85 1.45 1.73 < 1 < 1 14 69 84 1.33 2.70 < 1 < 1 15 74 93 1.20 2.37 < 1 < 1 16 77 86 1.80 3.00 < 1 < 1 17 130 145 3.16 3.64 12 < 1 18 75 72 1.03 2.38 124 < 1 19 71 70 1.10 2.09 33 1 20 65 70 0.83 1.73 22 3 21 73 75 1.09 1.73 24 1 Maximum 130 145 3.16 3.64 124 < 3 Minimum 65 70 0.83 1.73 < 1 < 1 Average 78 87 1.42 2.33 22 < 1 #Tests 10 10 10 0 10 0 10 10 0 Site ACMW-14 Nitrate-Nitrogen &Water Level Chlorides 10 5545 50 8 5540 40 6 5535 y 30 J N J � J � y E 4 5530 20 2 5525 10 0 5520 0 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 t Nitrate t Water Level Linear(Nitrate) Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 0.3 300 J J E E 0.2 200 0.1 100 0 0.0 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 TDS Linear(TDS) Total P Linear(Total P) Annual Metal Report ACMW-14 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/19/2012 9.04 0.55 2.52 5.82 <10 23.9 <1 41.8 <1 <0.5 <1 <20 62.4 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 8/1/2014 9.11 <1 2.87 5.82 <0.5 76.7 1.58 47.7 <1 <0.5 <1 <2 268 <0.2 5.17 <2 <5 <0.5 <1 <5 <1 <3 <20 6/11/2015 8.98 <1 2.80 6.15 <0.5 98.7 1.67 43.8 <1 <0.5 <1 <2 182 <0.2 5.27 <2 <5 <0.5 <1 <5 <1 <3 <20 8/16/2016 7.86 <1 2.53 5.03 <0.5 181 <1 44.8 <1 <0.5 <1 <2 216 <0.2 4.82 <2 <5 <0.5 <1 <5 <1 <3 <20 6/8/2017 15.9 <1 5.24 6.48 <0.5 804 <1 105 <1 <0.5 1.44 <2 1380 <0.2 24.4 <2 <5 <0.5 <1 <5 <1 3.1 <20 9/18/2018 7.27 <1 2.30 4.96 <0.5 971 <1 47.4 <1 <0.5 1.44 <2 803 <0.2 9.09 <2 <5 <0.5 <1 <5 <1 6/6/2019 6.74 <1 2.14 4.41 <0.5 1060 <1 43.8 <1 <0.5 1.37 <2 767 <0.2 8.51 <2 <5 <0.5 <1 <5 <1 <3 <20 8/20/2020 6.06 <1 1.85 4.18 <0.5 433 <1 41.4 <1 <0.5 <1 <2 282 <0.2 2.35 <2 <5 <0.5 <1 <5 <1 <3 <20 8/25/2021 7.57 <1 2.28 4.9 <0.5 429 <1 48.5 <1 <0.5 <1 <2 399 <0.2 8.28 <2 <5 0.574 <1 <5 <1 <3 <20 Site: ACMW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT LLPINE COUNTY GROUNDWATER QUALITY DAT 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 03/24/2021 19.61 5480.99 12.1 5.98 29.0 0.027 0.154 < 0.020 < 0.010 0.288 0.442 46 06/08/2021 9.61 5490.99 12.2 6.34 27.1 0.028 < 0.050 < 0.020 < 0.010 0.116 0.149 46 09/17/2021 17.95 5482.65 16.3 5.88 31.0 0.028 < 0.050 < 0.020 < 0.010 0.363 0.392 50 12/02/2021 21.94 5478.66 14.8 5.92 32.5 0.031 < 0.050 < 0.020 < 0.010 0.405 0.413 58 Maximum 21.94 5490.99 16.3 6.34 32.5 0.031 0.154 < 0.020 < 0.010 0.405 0.442 58 Minimum 9.61 5478.66 12.1 5.88 27.1 0.027 < 0.050 < 0.020 < 0.010 0.116 0.149 46 Average 17.28 5483.32 13.9 6.03 29.9 0.029 0.076 < 0.020 < 0.010 0.293 0.349 50 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Coli E. coli Fecal EC Chloride COD SO4 Color Chromo Chromo Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 03/24/2021 68.0 1.18 1.49 < 1 < 1 06/08/2021 63.8 1.53 1.65 1.0 < 1 09/17/2021 77.9 1.68 1.73 < 1 < 1 12/02/2021 77.2 1.81 1.81 < 1 < 1 Maximum 78 1.81 1.81 1 < 1 Minimum 64 1.180 1.49 < 1 < 1 Average 72 1.550 1.67 1.0 < 1 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 23.6 5477.0 12.3 5.97 31 4.60 0.042 0.055 0.024 < 0.010 0.659 0.724 13 23.7 5476.9 12.2 6.12 28 0.042 0.088 0.032 < 0.012 0.934 1.018 14 25.6 5475.0 13.1 6.11 27 0.037 0.055 0.022 < 0.013 1.160 1.185 15 27.8 5472.8 12.7 6.06 27 0.024 0.059 < 0.020 < 0.017 1.557 1.610 16 15.8 5484.8 13.6 5.94 25 0.028 0.335 < 0.020 < 0.058 6.105 6.423 17 12.0 5488.6 13.7 6.19 28 0.031 0.105 < 0.020 < 0.013 0.673 0.705 18 16.7 5483.9 14.9 6.15 30 0.033 0.074 < 0.020 < 0.020 0.360 0.396 19 13.8 5486.8 13.6 5.94 30 0.029 < 0.080 < 0.020 < 0.010 0.366 0.363 20 17.6 5483.0 13.8 5.97 31 0.028 0.143 < 0.020 < 0.010 0.209 0.311 21 17.3 5483.3 13.9 6.03 30 0.029 0.076 < 0.020 < 0.010 0.293 0.349 Maximum 27.8 5488.6 14.9 6.19 31 4.60 0.042 0.335 0.032 0.058 6.105 6.423 Minimum 12.0 5472.8 12.2 5.94 25 4.60 0.024 < 0.055 0.020 < 0.010 0.209 0.311 Average 19.4 5481.2 13.4 6.05 29 4.60 0.032 0.107 0.022 0.017 1.231 1.308 #Tests 10 10 10 10 10 0 1 10 10 10 10 10 10 Site: ACMW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 2012 To: 2021 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 65 73 1.46 1.82 < 1 < 1 First year of sampling 13 65 72 1.62 1.78 < 1 < 1 14 61 72 1.58 1.82 < 1 < 1 15 68 86 1.64 1.81 < 1 < 1 16 99 114 3.09 3.18 3 < 1 17 56 70 0.81 1.76 3 < 1 18 55 69 1.21 1.46 2 < 1 19 54 67 0.88 1.45 2 < 1 20 53 69 1.13 1.43 1 < 1 21 50 72 1.55 1.67 1 < 1 Maximum 99 114 3.09 3.18 < 3 < 1 Minimum 50 67 0.81 1.43 < 1 < 1 Average 63 76 1.50 1.82 < 2 < 1 #Tests 10 10 10 0 10 0 10 10 0 Site ACMW-15 Nitrate-Nitrogen &Water Level Chlorides 10 5490 20 8 5485 15 r 6 5480 d J a�i J J E 10 E ;, 4 5475 5 2 5470 ------------ • • 0 5465 0 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 Nitrate T Water Level Linear(Nitrate) Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 0.3 300 J J E E 0.2 200 0.1 100 0 0.0 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 TDS Linear(TDS) Total P Linear(Total P) Annual Metal Report ACMW-15 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/19/2012 7.63 1.17 1.72 4.4 <10 561 <1 38.2 <1 <0.5 <1 <20 376 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/12/2013 6.41 1.20 1.59 4.1 6/5/2014 7.08 1.15 1.67 4.4 <0.5 69.8 <1 30.6 <1 <0.5 <1 <2 67.6 <0.2 3.52 <2 <5 <0.5 <1 <5 <1 <3 <20 6/2/2015 7.49 1.08 1.75 4.2 <0.5 35 <1 34 <1 <0.5 <1 <2 46.2 <0.2 2.15 <2 <5 <0.5 <1 <5 <1 <3 <20 8/30/2016 11.1 1.59 2.56 5.0 <0.5 22.3 <1 42.4 <1 <0.5 <1 <2 21.3 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/20/2017 6.60 <1 1.57 3.9 <0.5 152 <1 22.5 <1 <0.5 <1 <2 152 <0.2 3.62 <2 <5 <0.5 <1 <5 <1 <3 <20 9/20/2018 7.25 <1 1.68 3.6 <0.5 67.3 <1 29.3 <1 <0.5 <1 <2 35.1 <0.2 3.62 <2 <5 <0.5 <1 <5 <1 <3 <20 6/13/2019 6.88 <1 1.60 3.3 <0.5 39.8 <1 25.7 <1 <0.5 <1 <2 33.9 <0.2 3.62 <2 <5 <0.5 <1 <5 <1 <3 <20 6/24/2020 6.53 <1 1.5 2.87 <0.5 143 <1 26.4 <1 <0.5 <1 <2 140 <0.2 4.04 <2 <5 <0.5 <1 <5 <1 <3 <20 6/8/2021 6.84 <1 1.60 3.38 <0.5 90.3 <1 25.5 <1 <0.5 <1 <2 51.8 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 03/24/2021 12.61 5471.92 11.1 6.31 63.3 0.050 0.209 < 0.020 < 0.010 0.603 0.812 94 06/08/2021 9.24 5475.29 11.9 6.45 46.7 0.048 0.050 < 0.020 < 0.010 0.788 0.838 78 09/17/2021 13.52 5471.01 15.9 6.12 55.9 0.047 < 0.050 < 0.020 < 0.010 0.251 0.286 78 12/02/2021 14.58 5469.95 13.6 6.22 57.6 0.027 < 0.050 < 0.020 < 0.010 0.728 0.737 92 Maximum 14.58 5475.29 15.9 6.45 63.3 0.050 0.209 < 0.020 < 0.010 0.79 0.84 94 Minimum 9.24 5469.95 11.1 6.12 46.7 0.027 < 0.050 < 0.020 < 0.010 0.251 0.286 78 Average 12.49 5472.04 13.1 6.28 55.9 0.043 0.090 < 0.020 < 0.010 0.593 0.668 86 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Coli E. coli Fecal EC Chloride COD SO4 Color Chromo Chromo Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 03/24/2021 142 1.81 1.70 1.0 < 1 06/08/2021 115 2.22 2.34 < 1 < 1 09/17/2021 117 1.40 1.98 < 1 < 1 12/02/2021 130 1.75 1.94 < 1 < 1 Maximum 142 2.22 2.34 1 < 1 Minimum 115 1.40 1.70 < 1 < 1 Average 126 1.80 1.99 1 < 1 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 17.1 5467.4 11.6 6.24 66 5.60 0.156 0.061 0.024 < 0.010 0.403 0.474 13 16.6 5468.0 11.7 6.43 75 0.118 0.069 0.029 < 0.012 0.310 0.356 14 15.2 5469.3 11.9 6.41 52 0.071 0.188 0.023 < 0.010 2.128 2.290 15 18.0 5466.6 12.1 6.41 53 0.061 0.060 < 0.020 < 0.013 0.776 0.795 16 11.8 5472.8 12.7 6.26 42 0.051 0.683 < 0.020 < 0.055 7.130 7.813 17 9.5 5475.0 12.7 6.38 53 0.056 0.133 < 0.020 < 0.013 1.408 1.445 18 11.2 5473.3 14.0 6.35 55 0.047 0.083 < 0.020 < 0.015 0.712 0.760 19 8.94 5475.6 12.0 6.11 51 0.051 < 0.080 < 0.020 < 0.010 0.901 0.932 20 11.29 5473.2 13.3 6.26 60 0.049 0.175 < 0.020 < 0.010 0.355 0.489 21 12.49 5472.0 13.1 6.28 56 0.043 0.090 < 0.020 < 0.010 0.593 0.668 Maximum 18.0 5475.6 14.0 6.43 75 5.60 0.156 0.683 0.029 0.055 7.130 7.813 Minimum 8.9 5466.6 11.6 6.11 42 5.60 0.043 < 0.060 < 0.020 < 0.010 0.310 0.356 Average 13.2 5471.3 12.5 6.31 56 5.60 0.070 0.162 0.022 0.016 1.472 1.602 #Tests 10 10 10 10 10 0 1 10 10 10 10 10 10 Site: ACMW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 2012 To: 2021 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 116 135 3.46 1.33 2 < 1 First year of sampling 13 128 156 3.55 0.82 1 < 1 14 109 132 3.64 1.26 1 < 1 15 98 128 2.38 1.32 1 < 1 16 133 163 3.62 3.99 9 < 1 17 93 132 1.43 3.36 4 < 1 18 86 121 1.30 1.83 < 1 < 1 19 85 117 1.64 2.02 2 < 1 20 92 129 1.51 1.83 608 53 21 86 126 1.80 1.99 1 < 1 Maximum 133 163 3.64 3.99 608 53 Minimum 85 117 1.30 0.82 < 1 < 1 Average 102 134 2.43 1.97 63 6 #Tests 10 10 10 0 10 0 10 10 0 Site ACMW-16 Nitrate-Nitrogen &Water Level Chlorides 10 5485 40 8 5480 30 6 5475 d ,> J E ;, E 20 4 5470 10 2 5465 0 5460 0 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 +Nitrate t Water Level Linear(Nitrate) Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 0.3 300 J J E E 0.2 200 0.1 100 0 0.0 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 TDS Linear(TDS) Total P Linear(Total P) Annual Metal Report ACMW-16 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/19/2012 14.1 1.40 3.79 7.11 <10 849 <1 39.8 <1 <0.5 <1 <20 830 <0.2 22.5 <2 <5 <2.5 <1 <5 <1 <3 <10 6/12/2013 16.1 1.21 4.15 7.97 6/5/2014 14.2 1.68 4.33 7.01 <0.5 109 1.88 42 <1 <0.5 <1 <2 466 <0.2 3.88 <2 <5 <0.5 <1 <5 <1 <3 <20 6/2/2015 13.2 1.21 4.00 6.89 <0.5 212 2.1 27.6 <1 <0.5 <1 <2 41.6 <0.2 4.35 <2 <5 <0.5 <1 <5 <1 <3 <20 8/30/2016 15.0 3.83 4.12 7.5 <0.5 62.7 <1 80 <1 <0.5 <1 <2 56.4 <0.2 2.06 <2 <5 <0.5 <1 <5 <1 <3 <20 6/20/2017 11.7 3.68 3.35 5.68 <0.5 151 <1 58.2 <1 <0.5 <1 <2 50.3 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 9/20/2018 12.1 4.04 3.29 6.22 <0.5 120 <1 82.5 <1 <0.5 <1 <2 68.0 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/13/2019 11.1 3.51 3.05 5.11 <0.5 41.1 <1 68.6 <1 <0.5 <1 <2 30.4 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/24/2020 12.3 3.84 3.33 5.10 <0.5 59.7 <1 78.4 <1 <0.5 <1 <2 47.0 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/8/2021 11.3 3.87 3.13 5.44 <0.5 85.8 <1 75.9 <1 <0.5 <1 <2 20.2 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NOZ-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 03/24/2021 16.03 5488.89 9.9 6.41 31.5 0.027 0.167 < 0.020 < 0.010 0.631 0.798 59 06/08/2021 6.98 5497.94 10.4 6.89 30.2 0.025 < 0.050 < 0.020 < 0.010 0.406 0.429 63 09/17/2021 17.84 5487.08 13.0 6.18 37.4 0.028 < 0.050 < 0.020 < 0.020 0.959 0.975 71 12/02/2021 16.05 5488.87 12.5 6.31 33.5 < 0.010 < 0.050 < 0.020 0.012 0.673 0.680 64 Maximum 17.84 5497.94 13.0 6.89 37.4 0.028 0.167 < 0.020 < 0.020 0.96 0.98 71 Minimum 6.98 5487.08 9.9 6.18 30.2 < 0.010 < 0.100 < 0.020 < 0.010 0.406 0.429 59 Average 14.23 5490.70 11.5 6.45 33.2 0.023 0.079 < 0.020 0.013 0.667 0.721 64 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Coli E. coli Fecal EC Chloride COD SO4 Color Chromo Chromo Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 03/24/2021 84.9 2.86 2.40 < 1 < 1 06/08/2021 78.7 2.06 2.85 < 1 < 1 09/17/2021 99.8 2.58 2.53 < 1 < 1 12/02/2021 88.5 2.98 3.51 < 1 < 1 Maximum 100 2.98 3.51 < 1 < 1 Minimum 79 2.06 2.40 < 1 < 1 Average 88 2.62 2.82 < 1 < 1 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 17.5 5487.4 11.8 6.20 41 2.8 0.031 < 0.050 0.023 < 0.017 1.449 1.516 13 15.2 5489.7 10.9 6.40 39 0.054 < 0.055 0.030 < 0.018 1.395 1.429 14 11.5 5493.4 11.9 6.38 36 0.037 < 0.050 0.022 < 0.010 0.864 0.880 15 17.3 5487.6 11.0 6.30 36 0.025 < 0.050 < 0.020 < 0.013 0.450 0.455 16 11.0 5493.9 12.2 6.22 35 0.027 < 0.105 < 0.074 < 0.025 1.033 1.032 17 9.5 5495.4 11.1 6.30 34 0.030 0.090 < 0.020 < 0.010 0.924 0.867 18 13.6 5491.4 11.6 6.43 35 0.029 0.087 < 0.020 < 0.013 0.617 0.664 19 9.3 5495.6 9.5 6.26 36 0.024 0.099 < 0.020 < 0.010 0.942 0.968 20 13.2 5491.7 11.6 6.40 38 0.025 0.160 < 0.020 < 0.015 0.986 1.093 21 14.2 5490.7 11.5 6.45 33 0.023 0.079 < 0.020 0.013 0.667 0.721 Maximum 17.5 5495.6 12.2 6.45 41 2.8 0.054 0.160 0.074 0.025 1.449 1.516 Minimum 9.3 5487.4 9.5 6.20 33 2.8 0.023 < 0.050 0.020 < 0.010 0.450 0.455 Average 13.2 5492.0 11.3 6.33 36 2.8 0.030 0.082 0.027 0.014 0.933 0.962 #Tests 10 11 10 10 10 0 1 10 10 10 10 10 10 Site: ACMW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 2012 To: 2021 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 78 105 2.25 2.26 1 < 1 First year of sampling 13 79 100 2.17 2.44 1 < 1 14 72 87 1.65 2.79 1 < 1 15 70 90 1.59 2.82 1 < 1 16 77 91 1.73 3.00 < 1 < 1 17 72 89 1.78 3.33 < 1 < 1 18 67 88 2.07 2.34 < 1 < 1 19 69 93 2.97 2.49 1 < 1 20 71 100 3.30 2.91 < 1 < 1 21 64 88 2.62 2.82 < 1 < 1 Maximum 79 105 3.30 3.33 1 < 1 Minimum 64 87 1.59 < 2.26 < 1 < 1 Average 72 93 2.21 2.72 1 < 1 #Tests 10 10 10 0 10 0 10 10 0 Site ACMW-17 Nitrate-Nitrogen &Water Level Chlorides 5 — 5500 40 4 5495 30 3 5490 w J w J J 6 20 E w E 2 5485 10 1 5480 0 5475 0 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 +Nitrate t Water Level Linear(Nitrate) Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 0.3 300 J J E E 0.2 200 0 100 .1 0 0.0 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 TDS Linear(TDS) Total P Linear(Total P) Annual Metal Report ACMW-17 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb 5b 5e TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/19/2012 10.3 1.59 2.77 5.56 <10 199 <1 28 <1 <0.5 <1 <20 149 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/12/2013 9.15 1.65 2.25 5.25 6/5/2014 8.40 1.35 2.53 4.72 <0.5 86.2 1.12 24.1 <1 <0.5 <1 <2 327 <0.2 6.29 <2 <5 <0.5 <1 <5 <1 <3 <20 6/2/2015 7.69 1.06 2.23 4.28 <0.5 27.8 <1 20.8 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/30/2016 8.50 1.54 2.36 4.99 <0.5 <20 <1 23.4 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/20/2017 8.08 1.11 2.35 4.6 <0.5 <20 <1 18.3 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 9/20/2018 8.15 1.00 2.25 4.58 <0.5 <20 <1 20.5 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/13/2019 7.63 <1 2.13 4.3 <0.5 32.0 <1 18.1 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/24/2020 7.99 <1 2.17 4.19 <0.5 27.1 <1 19.2 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/8/2021 7.70 <1 2.15 4.59 <0.5 27.7 <1 19.0 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-18 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 03/24/2021 8.71 5461.85 11.0 6.48 34.1 0.030 0.117 < 0.020 < 0.010 0.446 0.563 06/08/2021 6.11 5464.45 12.3 6.60 30.6 0.028 < 0.05 < 0.020 < 0.010 1.20 1.20 09/17/2021 9.16 5461.40 15.1 6.34 32.2 0.033 < 0.050 < 0.020 < 0.020 0.259 0.256 12/02/2021 9.31 5461.25 14.0 6.37 32.5 0.010 < 0.050 < 0.020 < 0.010 0.317 0.331 Maximum 9.31 5464.45 15.1 6.60 34.1 0.033 0.12 < 0.020 < 0.020 1.20 1.20 Minimum 6.11 5461.25 11.0 6.34 30.6 0.010 < 0.050 < 0.020 < 0.010 0.259 0.3 Average 8.32 5462.24 13.1 6.45 32.4 0.025 0.067 < 0.020 < 0.013 0.556 0.588 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-18 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Coli E. coli Fecal TDS EC Chloride COD SO4 Color Chromo Chromo Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 03/24/2021 61 87.0 2.73 1.68 < 1 < 1 06/08/2021 59 85.2 2.58 1.98 4.1 1.0 09/17/2021 50 77.2 1.83 2.02 3.0 < 1 12/02/2021 54 78.0 1.86 1.99 1.0 < 1 Maximum 61 87.0 2.73 2.02 4.1 < 1 Minimum 50 77.2 1.83 1.68 < 1 < 1 Average 56 81.9 2.25 1.92 2 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-18 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 11.3 5459.2 12.6 6.18 37 5.20 0.037 0.135 0.023 < 0.010 0.940 1.085 13 10.2 5460.3 11.9 6.51 36 0.049 0.052 0.028 < 0.015 1.023 1.041 14 8.5 5462.1 12.9 6.48 33 0.031 0.061 0.021 < 0.015 1.500 1.558 15 10.3 5460.3 12.9 6.43 37 0.031 < 0.050 < 0.020 < 0.013 0.401 0.413 16 8.2 5462.3 12.4 6.40 30 0.030 0.203 < 0.020 < 0.035 2.545 2.710 17 6.8 5463.8 12.6 6.58 27 0.031 0.115 < 0.020 < 0.018 1.949 1.937 18 8.6 5462.0 12.9 6.38 34 0.032 0.115 < 0.020 < 0.010 0.594 0.637 19 7.1 5463.5 12.5 6.21 31 0.033 0.090 < 0.020 < 0.010 0.967 0.928 20 8.0 5462.6 13.1 6.68 31 0.031 0.173 < 0.020 < 0.015 0.352 0.502 21 8.3 5462.2 13.1 6.45 32 0.025 0.067 < 0.020 < 0.013 0.556 0.588 Maximum 11.3 5463.8 13.1 6.68 37 5.20 0.049 0.203 0.028 0.035 2.545 2.710 Minimum 6.8 5459.2 11.9 6.18 27 5.20 0.025 0.050 0.020 < 0.010 0.352 0.413 Average 8.7 5461.8 12.7 6.43 33 5.20 0.033 0.106 0.021 0.015 1.083 1.140 #Tests 10 10 10 10 10 0 1 10 10 10 10 10 10 Site: ACMW-18 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2012 To: 2021 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 64 86 1.47 2.23 2 < 1 First year of sampling 13 67 89 1.87 2.27 < 1 < 1 14 67 85 1.62 2.45 1 < 1 15 63 91 1.49 2.50 3 < 1 16 72 91 1.89 2.60 4 < 1 17 64 81 1.09 3.34 1 < 1 18 58 80 1.27 2.15 10 < 1 19 54 80 1.34 2.20 5 < 1 20 56 73 1.83 1.80 1 < 1 21 56 82 2.25 1.92 2 < 1 Maximum 72 91 2.25 3.34 10 < 1 Minimum 54 73 1.09 1.80 < 1 < 1 Average 62 84 1.61 2.35 3 < 1 #Tests 10 10 10 0 10 0 10 10 0 Site ACMW-18 Nitrate-Nitrogen &Water Level Chlorides 5 5475 40 4 5470 30 x 3 5465 d J N J �+ J rn 20 E N E 2 5460 10 1 5455 0 5450 0 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 t Nitrate T Water Level Linear(Nitrate) Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 0.3 300 J J E E 0.2 200 0 100 .1 0 0.0 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 TDS Linear(TDS) Total P Linear(Total P) Annual Metal Report ACMW-18 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/19/2012 9.3 1.05 2.38 3.74 <10 433 <1 22 <1 <0.5 <1 <20 321 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/12/2013 9.07 0.984 2.51 3.72 6/5/2014 10.8 1.15 2.87 4.39 <0.5 <20 <1 20.3 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/2/2015 10.1 1.61 3.35 4.15 <0.5 2450 2.12 44 <1 <0.5 5.22 2.66 3580 <0.2 76.2 1.95 <5 1.59 <1 <5 <1 5.49 <20 8/30/2016 8.37 1.08 2.19 3.69 <0.5 36.3 <1 16.6 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/20/2017 7.46 <1 2.02 3.38 <0.5 109 <1 14.1 <1 <0.5 <1 <2 33.7 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 9/20/2018 8.55 <1 2.22 3.75 <0.5 20 <1 16.7 <1 <0.5 <1 <2 <20 <0.2 2.4 2.04 <5 <0.5 <1 <5 <1 <3 <20 6/13/2019 9.32 <1 2.43 3.97 <0.5 <20 <1 17.3 <1 <0.5 <1 <2 <20 <0.2 3.63 <2 <5 <0.5 <1 <5 <1 <3 <20 6/24/2020 6.22 <1 1.57 2.89 <0.5 152 <1 14 <1 <0.5 <1 <2 59.9 <0.2 11.4 2.42 <5 <0.5 <1 <5 <1 <3 <20 6/8/2021 9.07 <1 2.38 3.83 <0.5 22.5 <1 17.4 <1 <0.5 <1 <2 9.95 <0.2 14.2 1.96 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-19 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NOZ-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 03/24/2021 6.98 5410.27 10.9 6.67 105 0.086 0.267 0.037 < 0.010 < 0.010 0.267 06/08/2021 7.63 5409.62 11.9 6.97 101 0.091 0.119 0.024 < 0.010 < 0.010 0.119 09/17/2021 8.05 5409.20 14.8 6.71 105 0.103 0.111 0.033 < 0.010 0.012 0.123 12/02/2021 6.30 5410.95 13.7 6.64 118 0.072 0.182 0.039 < 0.010 < 0.010 0.182 Maximum 8.05 5410.95 14.8 6.97 118 0.103 0.267 0.039 < 0.010 0.012 0.267 Minimum 6.30 5409.20 10.9 6.64 101.0 0.072 0.111 0.024 < 0.010 < 0.010 0.119 Average 7.24 5410.01 12.8 6.75 107.3 0.088 0.170 0.033 < 0.010 0.011 0.173 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-19 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Coli E. coli Fecal TDS EC Chloride COD SO4 Color Chromo Chromo Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 03/24/2021 128 206 2.49 0.701 < 1 < 1 06/08/2021 125 204 2.78 0.867 < 1 < 1 09/17/2021 133 211 3.82 1.07 < 1 < 1 12/02/2021 152 242 3.84 0.562 < 1 < 1 Maximum 152 242 3.84 1.07 < 1 < 1 Minimum 125 204 2.49 0.56 < 1 < 1 Average 135 216 3.23 0.80 < 1 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-19 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2021 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 7.4 5409.9 12.9 6.75 106 6.70 0.092 0.106 0.050 < 0.010 0.010 0.126 13 7.1 5410.2 12.4 6.88 105 0.129 0.159 0.067 0.012 < 0.010 0.160 14 7.7 5409.6 12.5 6.80 129 0.111 0.121 0.041 0.010 < 0.010 0.123 15 8.3 5409.0 13.1 6.84 93 0.104 0.126 0.050 < 0.010 < 0.010 0.128 16 7.7 5409.6 12.7 6.75 105 0.102 0.139 0.050 < 0.015 < 0.020 0.139 17 7.0 5410.3 12.8 6.91 91 0.100 0.175 0.050 < 0.010 < 0.010 0.175 18 7.6 5409.7 13.6 6.64 104 0.103 0.175 0.043 < 0.013 < 0.009 0.150 19 7.3 5409.9 12.4 6.60 91 0.098 0.155 0.042 < 0.010 < 0.011 0.155 20 7.7 5409.6 12.8 6.86 95 0.099 0.255 0.044 < 0.010 < 0.010 0.255 21 7.2 5410.0 12.8 6.75 107 0.088 0.170 0.033 < 0.010 0.011 0.173 Maximum 8.3 5410.3 13.6 6.91 129 6.70 0.129 0.255 0.067 0.015 0.020 0.255 Minimum 7.0 5409.0 12.4 6.60 91 6.70 0.088 < 0.106 0.033 < 0.010 < 0.009 0.123 Average 7.5 5409.8 12.8 6.78 103 6.70 0.103 0.158 0.047 0.011 0.011 0.158 #Tests 10 10 10 10 10 0 1 10 10 10 10 10 10 Site: ACMW-19 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2012 To: 2021 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 144 221 2.81 2.87 2 < 1 First year of sampling 13 154 241 2.97 1.62 1 < 1 14 152 253 2.47 2.00 3 < 1 15 120 192 2.46 2.29 < 1 < 1 16 138 213 3.47 2.91 6 < 1 17 155 238 14.32 8.17 1 < 1 18 135 216 4.33 2.08 < 1 < 1 19 126 197 5.45 2.65 2 < 1 20 125 191 2.95 1.64 < 1 < 1 21 135 216 3.23 0.80 < 1 < 1 Maximum 155 253 14.32 8.17 6 < 1 Minimum 120 191 2.46 0.80 < 1 < 1 Average 138 218 4.45 2.70 2 < 1 #Tests 10 10 10 0 10 0 10 10 0 Site ACMW-19 Nitrate-Nitrogen &Water Level Chlorides 0.25 5425 40 0.20 5420 30 0.15 5415 d J y J J 6 20 E d E 0.10 5410 0.05 5405 10 0.00 � � � � � 5400 0 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 +Nitrate T Water Level —Linear(Nitrate) Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 0.3 300 J J E E 0.2 200 0.1 100 0 0.0 12 13 14 15 16 17 18 19 20 21 12 13 14 15 16 17 18 19 20 21 TDS Linear(TDS) Total P Linear(Total P) Annual Metal Report ACMW-19 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/19/2012 20.5 2.08 5.87 10.3 <10 358 1.2 32.8 <1 <0.5 <1 <20 611 <0.2 1690 3.08 <5 <2.5 <1 <5 <1 <3 <10 6/12/2013 21.7 2.07 7.01 9.86 6/5/2014 31.8 2.35 10.1 10.1 <1 255 2.33 103 <2 <1 <2 <4 750 <0.2 4980 <4 <10 <1 <2 <10 <2 <6 <40 6/2/2015 18.4 1.44 5.77 7.06 <0.5 <20 <1 80 <1 <0.5 <1 <2 138 <0.2 2400 3.77 <5 <0.5 <1 <5 <1 <3 <20 8/30/2016 23.9 2.14 7.21 8.44 <0.5 <20 <1 108 <1 <0.5 <1 <2 212 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/20/2017 25.8 1.73 8.08 9.10 <0.5 22.8 <1 108 <1 <0.5 <1 <2 232 <0.2 3380 2.44 <5 <0.5 <1 <5 <1 <3 <20 9/20/2018 22.8 1.54 6.77 10.8 <0.5 <20 <1 106 <1 <0.5 <1 <2 176 <0.2 3140 3.52 <5 <0.5 <1 <5 <1 <3 <20 6/13/2019 21.1 1.42 6.31 9.91 <0.5 <20 <1 93.6 <1 <0.5 <1 <2 156 <0.2 3000 3.29 <5 <0.5 <1 <5 <1 <3 <20 6/24/2020 19.4 1.25 5.70 8.70 <0.5 34.1 <1 88.7 <1 <0.5 <1 <2 154 <0.2 2820 3.57 <5 <0.5 <1 <5 <1 <3 <20 6/8/2021 22.8 1.44 6.88 9.50 <0.5 <20 <1 104 <1 <0.5 <1 <2 161 <0.2 3420 3.69 <5 <0.5 <1 <5 <1 <3 <20 ALPINE COUNTY POTABLE WATER WELLS Site: GW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Temp Alk Hard Turb Total P TKN NH3-N NOZ-N NO3-N Total N Date C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 01/26/21 8.6 6.39 60.6 0.038 < 0.10 < 0.020 < 0.010 4.72 4.7 06/03/21 13.8 6.52 60.2 0.042 0.33 < 0.020 < 0.010 4.61 4.94 08/25/21 14.5 6.33 60.4 0.039 0.37 < 0.020 < 0.010 4.80 5.17 11/18/21 11.8 6.55 61.3 0.040 < 0.050 < 0.020 < 0.010 5.72 5.66 Maximum 14.5 6.55 61.3 0.042 0.370 0.020 < 0.010 5.72 5.66 Minimum 8.6 6.33 60.2 0.038 < 0.100 < 0.020 < 0.010 4.61 4.70 Average 12.2 6.45 60.6 0.040 0.213 0.020 < 0.010 4.96 5.12 #Tests 4 4 4 0 0 4 4 4 4 4 4 Site: GW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN 01/26/21 172 295 30.5 10.1 < 1 < 1 06/03/21 181 274 29.3 9.86 < 1 < 1 08/25/21 187 285 29.6 9.73 < 1 < 1 11/18/21 193 270 31.3 9.92 < 1 < 1 Maximum 193 295 31.3 10.1 < 1 < 1 Minimum 172 270 29.3 9.7 < 1 < 1 Average 183 281 30.2 9.9 < 1 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: GW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 1981 To: 2021 Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO,-N Total N Year C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 81 12.0 6.59 48.0 0.10 0.040 0.177 0.040 0.940 1.12 82 9.8 6.40 47.0 0.040 0.070 0.010 0.960 1.03 83 11.1 6.60 49.0 91 1.50 0.040 0.063 0.020 < 0.010 0.840 0.860 84 12.0 6.41 52.0 88 0.22 0.040 0.108 0.040 < 0.010 0.710 0.830 85 11.5 6.60 55.0 89 0.22 0.034 0.083 0.034 < 0.010 0.808 0.901 86 11.3 6.71 55.0 92 0.32 0.030 0.078 0.028 < 0.010 0.861 0.949 87 11.6 6.63 55.0 97 0.21 0.032 0.086 <0.020 < 0.010 0.970 1.32 88 11.5 6.51 56.0 111 0.25 0.030 0.105 0.029 < 0.010 1.00 1.12 89 11.1 6.49 55.0 112 0.25 0.028 0.099 0.037 < 0.010 1.04 1.15 90 11.5 6.74 53.0 126 0.15 0.042 0.097 <0.020 < 0.010 1.32 1.43 91 11.1 6.93 55.0 133 0.19 0.033 0.094 0.031 0.010 1.42 1.53 92 11.9 6.75 55.0 132 0.28 0.031 0.087 0.024 0.012 1.58 1.68 93 10.6 6.86 56.0 123 0.13 0.031 0.113 0.030 0.012 1.96 2.09 94 11.6 6.63 57.0 124 0.24 0.028 0.070 0.023 0.011 2.36 2.45 95 10.9 6.69 59.0 112 0.20 0.050 0.094 0.030 0.010 2.44 2.54 96 12.1 6.56 59.0 111 0.17 0.031 0.109 0.021 0.011 2.93 3.05 97 11.7 6.44 60.0 105 0.21 0.029 0.116 0.021 0.011 3.07 3.20 98 10.7 6.40 62.0 94 0.53 0.032 0.131 <0.021 < 0.010 3.02 3.16 99 11.6 6.33 61.0 93 0.11 0.033 0.139 <0.020 < 0.010 3.18 3.33 00 11.2 6.74 62.0 84 0.12 0.037 0.189 0.021 < 0.012 3.59 3.70 01 11.8 6.48 62.0 83 0.15 0.033 0.100 <0.020 < 0.028 3.39 3.48 02 11.6 6.54 62.0 78 0.02 0.030 0.113 < 0.053 3.30 3.48 03 11.9 6.79 59.1 76 0.02 0.034 0.076 < 0.053 3.30 3.39 04 11.8 6.67 59.0 80 0.05 0.036 0.124 < 0.030 3.47 3.57 05 11.2 6.62 58.3 79 0.06 0.034 0.101 < 0.030 3.64 3.76 06 11.1 6.63 56.9 77 0.17 0.032 0.066 < 0.032 3.81 3.89 07 10.9 6.63 58.7 82 0.08 0.029 0.067 < 0.035 4.61 4.68 08 11.4 6.67 61.5 89 0.09 0.035 < 0.058 < 0.044 5.18 5.25 09 11.3 6.36 61.5 90 0.06 0.037 < 0.050 < 0.048 5.61 5.68 10 11.3 6.46 60.9 83 0.09 0.037 0.052 < 0.048 5.25 5.33 11 11.5 6.29 61.2 78 0.18 0.040 0.058 < 0.043 4.52 4.54 12 12.3 6.46 62.7 83 0.09 0.037 0.184 <0.020 < 0.049 4.67 4.82 13 11.6 6.39 62.6 0.039 0.127 0.026 < 0.042 4.86 4.86 14 12.1 6.42 61.8 0.036 0.358 0.025 < 0.040 4.57 4.87 15 12.3 6.45 61.0 0.042 0.108 < 0.020 < 0.040 4.74 4.70 16 11.5 6.48 61.5 0.043 0.255 < 0.020 < 0.050 4.19 4.36 17 12.2 6.49 60.0 0.038 0.300 0.023 < 0.038 3.83 4.06 18 11.2 6.17 60.3 0.038 0.208 < 0.020 < 0.014 3.97 4.15 19 12.4 6.22 61.0 0.038 0.118 < 0.020 < 0.020 4.08 4.05 20 10.9 7.17 60.5 0.037 0.120 0.023 < 0.010 4.17 4.21 21 12.2 6.45 60.6 0.040 0.213 0.020 < 0.010 4.96 5.12 Maximum 12.4 7.17 62.7 133 1.50 0.050 0.358 0.040 0.053 5.61 5.68 Minimum 9.8 6.17 47.0 76 0.02 0.028 <0.050 0.010 < 0.010 0.710 0.830 Average 11.5 6.56 58.1 96 0.21 0.035 0.121 0.024 0.024 3.05 3.16 #Tests 41 41 41 30 31 41 41 31 39 41 41 Site: GW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 1981 To: 2021 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 81 171 238 35.0 1 < 5 3.9 <2.2 82 187 256 3 5.0 <2.2 83 155 252 38.0 1 5 <2.2 <2.2 84 172 247 34.0 1 < 5 <2.2 <2.2 85 171 250 32.9 1 < 5 2.6 <2.2 86 175 255 38.5 2 < 5 2.3 <2.2 87 188 270 35.8 3 < 5 <2.2 <2.2 88 208 310 41.6 5 < 5 <2.2 <2.2 89 213 316 42.4 5 < 5 <2.0 <2.0 90 233 348 48.2 < 5 < 5 <2.0 <2.0 91 251 357 50.8 5 < 5 3.2 <2.0 92 250 366 49.9 < 5 < 5 3.2 <2.0 93 245 356 44.6 < 5 < 5 2.3 <2.0 94 240 365 49.8 < 5 4 4.6 <2.0 95 222 336 40.0 7 < 5 2.0 <2.0 96 209 326 37.8 2 5 3.0 1.2 97 194 304 33.9 4 5 1.6 1.0 98 186 291 30.1 < 5 < 5 < 1.1 < 1.1 99 181 279 26.6 < 5 < 5 1.6 1.1 00 174 268 23.6 < 5 10.8 < 5 < 1.1 < 1.1 01 167 256 23.6 < 5 13.1 < 5 1.1 1.1 02 166 251 22.8 < 5 12.2 < 5 < 1.1 < 1.1 03 164 245 24.4 6 11.8 < 5 < 1.1 < 1.1 04 168 252 26.3 < 5 11.7 < 5 < 1.1 < 1.1 05 172 238 28.1 < 5 11.8 < 5 < 1.1 < 1.1 06 174 241 29.5 < 6 11.3 < 5 < 1.1 < 1.1 07 189 281 32.9 < 5 11.8 5 < 1.1 < 1.1 08 195 308 34.3 < 5 12.1 5 < 1.1 < 1.1 09 197 305 34.2 < 5 11.9 5 < 1.1 < 1.1 10 195 296 31.3 11 12.4 < 5 < 1.1 < 1.1 11 183 280 27.7 6 11.8 < 5 < 1.1 < 1.1 12 183 278 28.2 11.7 < 5 < 1.1 < 1.1 13 188 285 29.0 11.5 < 1.1 < 1.1 14 184 283 28.3 11.2 < 1.1 < 1.1 15 187 287 29.6 11.9 7.3 < 1.0 16 178 277 27.3 11.0 < 1.0 < 1.0 17 169 252 23.5 10.1 < 1.0 < 1.0 18 173 266 25.4 9.8 < 1.0 < 1.0 19 174 265 25.6 9.4 < 1.3 < 1.0 20 168 260 26.9 9.4 < 1.0 < 1.0 21 183 281 30.2 9.9 < 1.0 < 1.0 Maximum 251 366 50.8 11 13.1 5 7.3 2.2 Minimum 155 238 22.8 1 9.4 4 < 1.0 < 1.0 Average 190 285 33.1 4 11.3 5 1.9 1.5 #Tests 41 41 40 31 22 31 41 41 0 Site GW-05 Nitrate-Nitrogen Chlorides 10 100 9 90 8 80 7 70 6 60 E 5 E 50 4 40 3 30 2 20 1 10 O 8182838485868788899091929394959697989900010203040506070809101112131415161718192021 0 8182 83 84 85 86 87 88 89 90 9192 93 94 95 96 97 98 99 00 0102 03 04 05 06 07 08 09 10 1112 13 14 15 16 17 18 19 20 2; Nitrate Linear(Nitrate) Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Coliform Bacteria 500 25 400 20 300 E 15 J p p1 O E 200 a 10 100 5 0 0 8182 83 8485 86 87 88 89 90 9192 93 94 9596 97 98 99 00 0102 0304 0506 07 08 09 10 11 121314151617181920 21 8182 83 84 85 86 87 88 89 90 9192 93 94 95 96 97 98 99 00 0102 03 04 05 06 07 08 09 10 11 1213141516171819 20 21 TDS Linear(TDS) ---*.--Total Coliforms Linear(Total Coliforms) Annual Metal Report GW-05 Neddenriep Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/7/2006 19.0 3.55 6.56 18.9 <50 <2 <2 <10 <2 <2 <20 <50 <0.2 <20 <2 <2 <2.5 <10 <2 <1 2 60.6 6/12/2007 21.6 3.66 6.90 19.7 <20 <2 180 <1 13.8 <0.5 <1 <20 <50 <0.2 <20 <2 <5 <2.5 <5 <1 <1 5.1 72.2 6/18/2008 24.1 4.02 7.04 20.5 <20 <2 53 <1 <10 <0.5 <1 <20 <50 <0.2 <20 <2 <5 <2.5 <5 <1 <1 <3 68.4 6/9/2009 23.2 3.90 7.34 22.6 <20 <2 55 <1 <10 <0.5 <1 <20 <50 <0.2 <20 <2 <5 <2.5 <5 <1 <1 <3 55.6 6/8/2010 23.0 3.50 7.30 21.0 <20 <1 55 <1 <0.5 <0.5 <1 3.4 <20 <0.2 2 <2 <5 <0.5 <5 <1 <1 <3 55 6/1/2011 21.1 3.67 7.25 22.2 <20 <1 47.9 <1 <0.5 <0.5 <1 2.56 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 <3 82.5 7/5/2012 17.3 3.62 6.12 20.4 <20 <1 47.8 <1 <10 <0.5 <1 <20 <50 <0.2 <20 <2 <5 <2.5 <5 <1 <1 44 6/11/2013 20.5 3.68 6.20 22.2 7/8/2014 20.8 3.65 6.64 23.7 <20 <1 49.0 <1 <0.5 <0.5 <1 2.41 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 3.38 43.5 8/18/2015 20.4 4.02 6.76 25.2 <20 <1 49.1 <1 <0.5 <0.5 <1 2.08 <20 <0.2 <2 <2 <5 0.52 <5 <1 <1 <3 77.9 8/16/2016 17.4 3.45 5.73 22.9 <20 <1 46.4 <1 <0.5 <0.5 <1 <2 <20 <0.2 <2 <2 <5 1.65 <5 <1 <1 3.14 123 6/8/2017 15.8 3.19 5.38 20.6 <20 <1 42.5 <1 <0.5 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 <3 80 9/18/2018 17.5 3.07 5.45 22.0 <20 <1 42.3 <1 <0.5 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 6/6/2019 18.2 3.26 5.64 23.3 <20 <1 44.8 <1 <0.5 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 <3 44.2 6/15/2020 17.8 3.15 5.45 22.2 <20 <1 <1 46.8 <0.5 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 <3 82.7 8/25/2021 18.6 3.09 5.63 23.5 <0.5 <20 <1 47.5 <1 <0.5 <1 2.27 <10 <0.2 <2 <2 <5 <0.5 <1 <5 <1 5.00 34.3 Site: GW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Temp Alk Hard Turb Total P TKN NH3-N NOZ-N NO3-N Total N Date C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 01/26/21 8.1 6.07 47.8 0.033 < 0.10 < 0.020 < 0.010 10.3 10 06/03/21 17.2 6.13 41.6 0.103 < 0.050 < 0.020 < 0.010 16.2 13.1 08/25/21 18.1 6.12 47.1 0.053 < 0.050 < 0.020 < 0.010 12.1 11.9 11/18/21 13.4 6.05 46.4 0.054 < 0.050 < 0.020 < 0.010 11.9 8.82 Maximum 18.1 6.13 47.8 0.103 < 0.100 < 0.020 < 0.01 16.2 13.10 Minimum 8.1 6.05 41.6 0.033 < 0.050 < 0.020 < 0.010 10.30 8.82 Average 14.2 6.09 45.7 0.061 < 0.063 < 0.020 < 0.010 12.63 10.96 #Tests 4 4 4 0 0 4 4 4 4 4 4 Site: GW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN 01/26/21 217 363 43.8 11.8 31.3 < 1 06/03/21 271 397 46.2 11.6 < 1 < 1 08/25/21 239 342 42.5 13.1 < 1 < 1 11/18/21 237 360 42.2 14.0 < 1 < 1 Maximum 271 397 46.2 14.0 31.3 < 1 Minimum 217 342 42.2 11.6 < 1 < 1 Average 241 366 43.7 12.6 9 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: GW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 1981 To: 2021 Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO,-N Total N Year C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 81 11.4 6.42 39.0 0.80 0.040 0.116 0.020 1.280 1.340 82 9.5 6.30 42.0 0.060 0.134 0.020 1.790 1.920 83 9.9 6.42 48.0 99 1.32 0.030 0.063 0.020 < 0.010 1.530 1.600 84 11.2 6.38 49.0 88 1.69 0.090 0.138 0.030 < 0.010 1.240 1.390 85 10.0 6.50 46.0 84 0.81 0.049 0.107 0.028 < 0.010 1.081 1.198 86 10.9 6.48 47.0 106 1.50 0.039 0.090 0.020 < 0.010 1.313 1.413 87 12.7 6.56 45.0 100 1.67 0.055 0.141 <0.021 < 0.010 1.340 1.844 88 13.9 6.57 45.0 102 1.40 0.039 0.152 0.030 < 0.010 1.536 1.698 89 10.9 6.54 46.0 121 5.22 0.081 0.104 0.024 < 0.010 2.638 2.752 90 12.0 6.79 48.0 103 2.38 0.045 0.102 0.020 < 0.010 3.414 3.525 91 11.7 7.01 52.0 86 0.95 0.074 0.125 0.033 < 0.010 2.937 3.072 92 12.1 6.76 54.0 85 0.31 0.038 0.121 0.023 0.010 3.711 3.842 93 11.8 6.95 57.0 72 0.73 0.041 0.125 0.024 0.011 4.054 4.189 94 11.7 6.78 57.0 68 0.54 0.032 0.100 0.028 0.010 4.505 4.615 95 12.2 6.66 58.0 60 2.32 0.050 0.090 0.030 0.010 5.500 5.600 96 13.3 6.52 59.0 58 1.09 0.057 0.207 0.020 0.011 6.526 6.743 97 11.6 6.51 58.0 59 0.51 0.048 0.139 0.020 0.011 6.586 6.738 98 11.5 6.48 57.0 46 1.31 0.048 0.163 <0.021 < 0.010 4.617 4.791 99 12.0 6.35 51.0 42 0.54 0.044 0.111 <0.020 < 0.010 3.996 4.117 00 12.1 6.77 52.0 48 1.40 0.073 0.198 0.021 < 0.012 5.176 5.295 01 12.5 6.47 50.0 48 3.43 0.073 0.125 0.028 < 0.033 5.142 5.246 02 11.9 6.54 49.0 55 0.36 0.058 0.212 < 0.051 6.282 6.645 03 12.4 7.06 47.6 49 36.70 0.077 0.084 < 0.045 5.266 5.383 04 13.0 6.70 50.1 53 4.92 0.113 0.149 < 0.043 5.715 5.872 05 12.3 6.53 49.5 60 2.65 0.046 0.096 < 0.047 7.136 7.218 06 12.3 6.45 51.2 62 8.84 0.056 0.168 < 0.067 9.035 9.060 07 13.4 6.26 51.7 60 2.50 0.041 0.089 < 0.091 9.036 9.171 08 13.8 6.46 52.1 55 0.71 0.074 < 0.058 < 0.088 7.759 7.873 09 13.9 6.19 48.5 58 4.74 0.061 < 0.050 < 0.068 7.118 7.210 10 12.9 6.31 48.1 55 0.34 0.069 0.064 < 0.060 6.949 7.180 11 14.0 6.20 49.6 57 0.66 0.045 0.072 < 0.052 7.376 7.279 12 14.9 6.24 49.3 62 0.16 0.046 < 0.051 <0.020 < 0.063 7.544 7.656 13 14.5 6.20 47.5 0.050 0.652 0.027 < 0.069 7.984 8.275 14 14.7 6.22 47.1 0.049 0.052 0.024 < 0.071 6.683 6.377 15 14.2 6.24 45.6 0.047 0.295 < 0.020 0.055 7.675 7.400 16 13.8 6.35 47.2 0.046 0.138 < 0.020 < 0.080 9.765 9.173 17 14.9 6.29 47.0 0.054 0.103 < 0.023 < 0.070 7.955 7.768 18 13.3 5.92 48.9 0.045 0.143 < 0.020 < 0.021 6.938 7.028 19 15.6 5.94 48.6 0.052 0.085 < 0.020 < 0.033 9.233 8.998 20 13.6 6.25 45.4 0.055 0.115 < 0.020 < 0.010 12.025 11.963 21 14.2 6.09 45.7 0.061 < 0.063 < 0.020 < 0.010 12.625 10.955 Maximum 15.6 7.06 59.0 121 36.70 0.113 0.652 0.033 0.091 12.625 11.963 Minimum 9.5 5.92 39.0 42 0.16 0.030 < 0.050 0.020 < 0.010 1.081 1.198 Average 12.6 6.46 49.5 70 2.98 0.055 0.131 0.023 0.034 5.610 5.644 #Tests 41 41 41 30 31 41 41 31 39 41 41 Site: GW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 1981 To: 2021 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 81 237 351 45.0 2 < 5 5.6 <2.2 82 206 326 3 7.7 <2.2 83 188 303 44.0 2 < 5 13.2 6.8 90 84 177 285 41.0 2 < 5 14.5 2.1 7.1 85 180 286 41.5 1 < 5 2.7 <2.2 < 2.2 86 227 350 51.6 2 < 5 <2.2 <2.2 < 2.2 87 211 344 45.6 3 < 5 <2.2 <2.2 < 2.2 88 221 365 51.3 6 < 5 5.1 <2.2 89 242 389 54.0 5 < 5 <2.0 <2.0 90 234 379 48.2 < 5 < 5 3.9 <2.0 91 210 343 43.7 < 5 < 5 4.5 <2.0 92 214 364 48.7 < 5 < 5 3.4 <2.0 93 203 336 37.5 13 < 5 3.8 <2.0 94 193 319 39.1 < 5 4 4.3 <2.0 95 181 303 33.0 6 5 5.8 <2.0 96 189 298 29.7 2 5 12.7 1.2 97 181 291 28.6 4 5 1.7 1.0 98 162 255 23.7 < 5 < 5 5.2 < 1.1 99 146 230 20.9 < 5 < 5 4.9 < 1.1 00 161 252 26.0 < 5 9.54 < 5 1.1 < 1.1 01 160 251 26.9 < 5 9.63 5 1.4 < 1.1 02 178 276 31.2 < 5 10.79 5 1.2 < 1.1 03 176 275 33.2 5 10.99 13 1.3 < 1.1 04 177 271 32.6 5 11.72 5 1.6 < 1.1 05 192 282 37.0 < 5 12.11 < 5 2.7 < 1.1 06 209 307 38.7 6 12.95 < 5 8.3 < 1.1 07 205 317 37.3 < 5 14.64 8 7.1 < 1.1 08 192 300 35.4 < 5 14.71 5 3.9 < 1.1 09 185 291 34.3 < 5 13.18 < 5 3.6 < 1.1 10 186 288 32.6 9 13.89 < 5 3.7 < 1.1 11 190 300 34.1 6 12.80 < 5 2.3 < 1.1 12 195 294 35.8 14.05 5 < 1.1 < 1.1 13 193 296 35.5 16.05 1.9 < 1.1 14 185 285 34.5 19.09 < 1.1 < 1.1 15 192 311 40.6 18.43 < 1 < 1 16 208 327 43.8 20.03 < 1 < 1 17 209 321 42.0 17.08 < 1 < 1 18 196 309 36.8 13.08 < 1 < 1 19 211 335 40.7 12.45 < 1 < 1 20 225 342 42.3 11.80 < 1 < 1 21 241 366 43.7 12.63 9 < 1 Maximum 242 389 54.0 13 20.03 13 14.5 6.8 90.0 Minimum 146 230 20.9 1 9.54 4 < 1 < 1 < 2.2 Average 197 310 38.0 5 13.71 5 4.0 1.6 20.7 #Tests 41 41 40 31 22 31 41 41 5 Site GW-08 Nitrate-Nitrogen Chlorides 10 100 9 90 8 80 7 70 6 60 E 5 E 50 4 40 3 30 2 20 1 10 0 8182 83 84 85 86 87 88 89 90 9192 93 94 95 96 97 98 99 00 0102 03 04 05 06 07 08 09 10 1112 13 14 15 16 17 18 19 20 21 0 8182 83 84 85 86 87 88 89 90 9192 93 94 95 96 97 98 99 00 0102 03 04 05 06 07 08 09 10 1112 13 14 15 16 17 18 19 20 21 Nitrate Linear(Nitrate) Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Coliform Bacteria 500 25 400 20 300 E 15 J p p1 O 200 a 10 100 5 0 0 8182 83 8485 86 87 88 89 90 9192 93 94 9596 97 98 99 00 0102 0304 0506 07 08 09 10 11 121314151617181920 21 8182 83 84 85 86 87 88 89 90 9192 93 94 95 96 97 98 99 00 0102 03 04 05 06 07 08 09 10 11 1213141516171819 20 21 TDS Linear(TDS) ---*.--Total Coliforms Linear(Total Coliforms) Annual Metal Report GW-08 Arant Ranch house Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb sb se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/7/2006 16.4 4.14 5.95 37.9 <10 <50 <2 <2 <2 <2 182 314 <0.2 <20 <2 2 <2.5 <2 <10 <1 <2 20 6/12/2007 15.7 4.00 5.47 37.2 <10 <20 <2 47 <1 <0.5 <1 183 211 <0.2 31.4 <2 <5 <2.5 <1 <5 <1 <3 149 6/18/2008 16.4 4.12 5.02 35.7 <10 <20 <2 48 <1 <0.5 <1 <20 267 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 66.3 6/9/2009 14.0 3.79 4.80 33.7 <10 <20 <2 40 <1 <0.5 <1 21 105 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 18.3 6/8/2010 15.0 3.50 5.10 33.0 <0.5 <20 <1 41 <1 <0.5 <1 23 84 <0.2 2.1 <2 <5 1.1 <1 <5 <1 <3 <20 6/1/2011 15.6 3.75 5.77 37.5 <0.5 <20 <1 42.7 <1 <0.5 <1 77.8 490 <0.2 14 <2 <5 3.81 <1 <5 <1 <3 <20 7/5/2012 11.8 3.52 4.13 30.7 <10 <20 <1 34.8 <1 <0.5 <1 36.1 <50 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <10 6/11/2013 14.4 3.84 4.70 35.1 7/8/2014 14.1 3.72 4.91 35.8 <0.5 <20 1.14 38.3 <1 <0.5 <1 13.9 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 3.32 68.1 8/18/2015 13.8 3.61 4.92 33.9 <0.5 <20 <1 41.0 <1 <0.5 <1 13.8 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 76.1 8/16/2016 14.3 3.58 5.12 34.4 <0.5 <20 <1 39.8 <1 <0.5 <1 5.67 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 75.9 6/8/2017 14.4 3.67 5.31 35.7 <0.5 <20 <1 45.4 <1 <0.5 <1 16.9 23.8 <0.2 2.63 <2 <5 <0.5 <1 <5 <1 <3 32 9/18/2018 15.5 3.47 5.10 34.6 <0.5 <20 <1 46.5 <1 <0.5 <1 45.3 23.8 <0.2 2.63 <2 <5 <0.5 <1 <5 <1 <3 6/6/2019 17.2 3.88 5.78 39.2 <0.5 <20 <1 52.1 <1 <0.5 <1 31.1 25.3 <0.2 2.63 <2 <5 <0.5 <1 <5 <1 <3 <20 6/15/2020 17.5 3.71 5.80 37.2 <0.5 <20 <1 54.1 <1 <0.5 <1 30.2 52.2 <0.2 3.26 <2 <5 6.90 <1 <5 <1 <3 <20 8/25/2021 18.0 3.6 5.86 36.8 <0.5 <20 <1 53.3 <1 <0.5 <1 7.12 10.0 <0.2 <2 <2 <5 <0.5 <1 <5 <1 4.58 <20 Site: GW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Temp Alk Hard Turb Total P TKN NH3-N NOZ-N NO3-N Total N Date C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 01/26/21 9.8 7.29 70.3 0.053 0.29 < 0.020 < 0.010 0.522 0.81 05/20/21 14.0 6.95 69.2 0.050 < 0.050 < 0.020 < 0.010 0.499 0.539 09/17/21 15.3 6.77 69.3 0.051 < 0.050 < 0.020 < 0.010 0.502 0.491 11/15/21 15.1 6.85 69.9 0.043 < 0.050 < 0.020 < 0.010 0.475 0.462 Maximum 15.3 7.29 70.3 0.053 0.290 < 0.020 < 0.010 0.522 0.810 Minimum 9.8 6.77 69.2 0.043 < 0.050 < 0.020 < 0.010 0.475 0.462 Average 13.6 6.97 69.7 0.049 0.110 < 0.020 < 0.010 0.500 0.576 #Tests 4 4 4 0 0 4 4 4 4 4 4 Site: GW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN 01/26/21 104 147 1.13 0.851 < 1 < 1 05/20/21 115 141 0.954 0.757 < 1 < 1 09/17/21 100 153 1.02 0.786 < 1 < 1 11/15/21 107 139 1.04 0.807 < 1 < 1 Maximum 115 153 1.13 0.85 < 1 < 1 Minimum 100 139 0.954 0.757 < 1 < 1 Average 107 145 1.04 0.800 < 1 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: GW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 1981 To: 2021 Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO,-N Total N Year C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 81 11.0 6.60 42.0 0.040 0.030 0.020 0.570 0.600 82 10.2 6.34 41.0 0.040 0.056 0.020 1.290 0.960 83 9.9 6.53 43.0 60 0.15 0.040 0.058 0.020 < 0.010 1.100 1.130 84 9.9 6.32 44.0 38 0.33 0.030 0.085 0.030 < 0.010 0.490 0.580 85 10.5 6.49 46.0 37 0.31 0.031 0.055 0.023 < 0.010 0.500 0.565 86 9.9 6.63 46.0 36 0.19 0.032 0.053 0.022 < 0.010 0.588 0.646 87 10.3 6.74 45.0 35 0.11 0.028 0.069 <0.020 < 0.010 0.370 0.582 88 10.1 6.47 46.0 35 0.17 0.029 0.070 0.033 < 0.010 0.308 0.388 89 11.0 6.60 46.0 35 0.16 0.027 0.048 0.023 < 0.010 0.522 0.580 90 10.7 7.09 43.0 39 0.18 0.035 0.063 0.020 < 0.010 0.336 0.409 91 11.5 7.04 44.0 34 1.76 0.034 0.072 0.027 0.010 0.268 0.350 92 12.4 6.83 46.0 34 0.28 0.030 0.063 0.022 < 0.011 0.325 0.399 93 11.3 6.94 40.0 32 0.14 0.037 0.091 0.026 0.011 0.213 0.314 94 12.3 6.66 41.0 33 0.30 0.023 0.070 0.023 0.010 0.206 0.286 95 12.3 6.66 39.0 30 0.55 0.030 0.269 0.210 0.010 0.250 0.530 96 13.5 6.46 42.0 34 0.33 0.028 0.094 0.025 0.011 0.386 0.491 97 13.6 6.57 45.0 38 0.13 0.029 0.094 0.021 0.011 0.524 0.631 98 14.0 6.24 47.0 39 0.45 0.026 0.117 <0.021 < 0.010 0.421 0.549 99 14.8 6.23 46.0 40 0.14 0.022 0.108 <0.020 < 0.010 0.402 0.602 00 13.4 6.98 58.0 48 0.26 0.027 0.114 0.021 < 0.010 0.408 0.480 01 15.0 7.07 77.0 57 0.12 0.048 0.131 <0.020 < 0.010 0.454 0.600 02 14.5 7.05 77.0 56 0.02 0.058 0.178 < 0.010 0.454 0.638 03 14.9 7.25 74.2 56 0.08 0.047 0.073 < 0.010 0.482 0.536 04 14.0 7.23 73.0 56 0.08 0.054 0.110 < 0.010 0.505 0.624 05 14.9 7.10 73.9 56 0.22 0.040 < 0.083 < 0.010 0.469 0.558 06 15.0 7.11 72.0 51 0.13 0.044 < 0.079 < 0.010 0.483 0.577 07 16.2 7.23 73.8 51 0.08 0.042 0.084 < 0.010 0.475 0.527 08 16.2 7.26 74.4 55 0.40 0.044 0.060 < 0.010 0.475 0.511 09 13.2 6.99 72.8 56 0.19 0.049 < 0.050 < 0.010 0.512 0.547 10 13.3 7.24 72.7 53 0.09 0.050 0.051 < 0.010 0.516 0.590 11 14.0 6.96 72.3 54 0.24 0.042 0.082 < 0.010 0.454 0.426 12 13.7 7.11 72.1 56 0.26 0.044 0.049 <0.020 < 0.010 0.526 0.555 13 14.8 7.04 71.7 0.056 < 0.050 0.027 < 0.009 0.491 0.499 14 13.7 7.00 70.9 0.047 0.056 0.027 0.010 0.503 0.496 15 13.5 6.97 71.2 0.047 < 0.050 < 0.020 < 0.010 0.520 0.514 16 14.5 6.76 70.9 0.053 < 0.063 < 0.020 < 0.010 0.477 0.480 17 14.5 7.19 71.7 0.056 < 0.075 < 0.020 < 0.010 0.472 0.402 18 13.6 6.89 69.1 0.045 < 0.063 < 0.020 < 0.013 0.478 0.475 19 13.4 6.73 70.0 0.043 0.075 < 0.020 < 0.010 0.510 0.516 20 15.8 7.06 67.2 0.046 < 0.088 < 0.020 < 0.010 0.495 0.485 21 13.6 6.97 69.7 0.049 0.110 < 0.020 < 0.010 0.500 0.576 Maximum 16.2 7.26 77.0 60 1.76 0.058 0.269 0.210 0.013 1.290 1.130 Minimum 9.9 6.23 39.0 30 0.02 0.022 0.030 0.020 0.009 0.206 0.286 Average 13.0 6.84 58.7 44 0.26 0.040 0.081 0.028 0.010 0.481 0.541 #Tests 41 41 41 30 30 41 41 31 39 41 41 Site: GW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 1981 To: 2021 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 81 82 90 < 1 <2.2 <2.2 82 81 106 1 <2.2 <2.2 83 60 99 3.000 2 8 <2.2 <2.2 84 65 96 2.000 1 < 5 <2.2 <2.2 85 68 96 1.500 1 < 5 <2.2 <2.2 86 67 96 1.400 1 < 5 <2.2 <2.2 87 73 92 1.100 3 < 5 <2.2 <2.2 88 74 96 1.100 5 < 5 <2.2 <2.2 89 71 95 1.200 6 < 5 <2.0 <2.0 90 79 94 1.000 < 5 < 5 <2.0 <2.0 91 75 94 1.000 < 5 < 5 <2.0 <2.0 92 72 95 1.000 < 5 < 5 <2.0 <2.0 93 70 87 1.00 < 5 < 5 <2.0 <2.0 94 70 91 0.900 < 5 4 <2.0 <2.0 95 68 83 0.900 < 5 < 5 <2.0 <2.0 96 73 90 0.900 2 5 1.2 1.2 97 77 96 1.30 4 5 1.0 1.0 98 81 101 0.900 < 5 < 5 < 1.1 < 1.1 99 78 99 1.00 < 5 < 5 < 1.1 < 1.1 00 95 120 0.900 < 5 0.850 < 5 < 1.1 < 1.1 01 115 151 0.800 < 5 0.790 < 5 < 1.1 < 1.1 02 116 147 0.700 < 5 1.310 < 5 < 1.1 < 1.1 03 118 146 0.754 < 5 0.772 < 5 < 1.1 < 1.1 04 117 144 0.740 < 5 0.783 < 5 < 1.1 < 1.1 05 117 138 0.796 < 5 0.939 < 5 < 1.1 < 1.1 06 116 139 0.695 < 6 0.752 < 5 < 1.1 < 1.1 07 116 141 0.715 < 5 0.745 < 5 < 1.1 < 1.1 08 117 139 0.988 < 5 0.766 < 5 < 1.1 < 1.1 09 115 142 0.909 < 5 0.751 < 5 < 1.1 < 1.1 10 117 145 0.788 11 0.847 < 5 < 1.1 < 1.1 11 113 145 0.771 6 0.678 < 5 < 1.1 < 1.1 12 114 142 0.838 0.710 < 5 < 1.1 < 1.1 13 116 141 0.762 0.654 < < 1.1 < 1.1 14 113 145 0.953 0.747 < 1.1 < 1.1 15 118 147 1.01 0.722 7.2 < 1 16 117 149 0.971 0.774 < 1 < 1 17 118 142 1.02 0.740 < 1 < 1 18 120 140 1.06 0.970 < 1 < 1 19 110 146 1.08 0.854 < 1 < 1 20 107 142 1.07 0.758 < 1 < 1 21 107 145 1.04 0.800 < 1 < 1 Maximum 120 151 3.000 11 1.310 8 7.2 2.2 Minimum 60 83 0.695 < 1 0.654 4 < 1 < 1 Average 95 120 1.040 4 0.805 5 1.6 1.5 #Tests 41 41 39 31 22 30 41 41 0 Site GW-11 Nitrate-Nitrogen Chlorides 5 50 4 40 3 30 J J E E 2 20 1 10 0 8182 83 84 85 86 87 88 89 90 9192 93 94 95 96 97 98 99 00 0102 03 04 05 06 07 08 09 10 1112 13 14 15 16 17 18 19 20 21 O 8182 83 84 85 86 87 88 89 90 9192 93 94 95 96 97 98 99 00 01 03 0 02 4 05 06 07 08 09 10 1112 13 14 15 16 17 18 19 20 21 Nitrate Linear(Nitrate) Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Coliform Bacteria 500 25 400 20 300 E 15 J p p1 O � Z 200 a 10 100 5 0 8182 83 84 85 86 87 88 89 90 9192 93 94 95 96 97 98 99 00 0102 03 04 05 06 07 08 09 10 1112 13 14 15 16 17 18 19 20 2; 0 8182838485868788899091929394959697989900010203040506070809101112131415161718192021 TDS Linear(TDS) ---*.--Total Coliforms Linear(Total Coliforms) Annual Metal Report GW-11 Diamond Valley School Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb Sb Se TI V Zn m /L m /L m /L m /L u /L u /L u /L u /L u /L u /L u /L u /L u /L u /L u /L u /L u /L u /L u /L u /L u /L u /L u /L 6/7/2006 12.6 1.48 4.32 10.1 <50 <2 <2 <10 <2 <2 30.2 83.3 <0.2 <20 <2 <2 <2.5 <10 <2 <1 2 95 6/12/2007 13.4 1.59 4.86 9.13 <20 <2 31 <1 <10 <0.5 <1 40.2 <50 <0.2 <20 <2 <5 <2.5 <5 <1 <1 <3 85.8 6/18/2008 15.4 1.62 4.59 10.2 <20 <2 34 <1 <10 <0.5 <1 <20 <50 <0.2 <20 <2 <5 <2.5 <5 <1 <1 <3 52.8 6/9/2009 13.4 1.51 4.94 9.83 <20 <2 32 <1 <10 <0.5 <1 28 <50 <0.2 <20 <2 <5 <2.5 <5 <1 <1 <3 47.7 6/8/2010 14.0 1.50 5.20 10.0 <20 <1 32 <1 <0.5 <0.5 1.1 11 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 <3 45 6/1/2011 13.6 1.64 5.35 8.99 <20 <1 28.6 <1 <0.5 <0.5 <1 23.7 <20 <0.2 <2 <2 <5 0.87 <5 <1 <1 <3 92.7 7/5/2012 12.3 1.59 4.34 8.72 <20 <1 31.2 <1 <10 <0.5 <1 81.9 <50 <0.2 <20 <2 <5 <2.5 <5 <1 <1 59.3 6/18/2013 12.5 1.44 4.14 9.23 6/17/2014 13.6 1.63 5.01 9.79 <20 <1 35.1 <1 <0.5 <0.5 <1 33.1 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 <3 60.7 7/15/2015 14.1 1.58 5.07 9.25 <20 <1 29.4 <1 <0.5 <0.5 <1 17.6 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 <3 51.1 8/10/2016 13.1 1.52 4.85 8.64 <20 <1 29.3 <1 <0.5 <0.5 <1 22 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 <3 44.8 7/27/2017 12.6 1.55 4.54 8.01 <20 <1 28.6 <1 <0.5 <0.5 <1 21 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 <3 30.9 8/29/2018 13.4 1.31 4.80 9.00 <20 <1 30.6 <1 <0.5 <0.5 <1 28.6 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 <3 42.1 8/14/2019 13.2 1.38 4.66 8.74 <20 <1 30.6 <1 <0.5 <0.5 <1 22.7 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 <3 33.0 8/8/2020 13.2 1.23 4.68 8.48 <20 <1 <1 30.8 <0.5 <0.5 <1 21.4 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 <3 29.4 9/17/2021 13.3 1.16 4.80 9.55 <0.5 <20 <1 30.5 <1 <0.5 1.34 23.2 21.6 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 27.4 Site: GW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT GW-17 ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Temp Alk Hard Turb Total P TKN NH3-N NOZ-N NO3-N Total N TDS Date C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 1/26/2021 9.9 6.50 57.5 0.028 < 0.10 < 0.020 < 0.020 1.02 1.0 93 5/20/2021 11.3 6.82 59.0 0.031 0.08 < 0.020 < 0.020 0.948 1.03 104 8/18/2021 13.5 6.11 60.9 0.028 < 0.05 < 0.020 < 0.020 0.796 0.842 102 11/15/2021 12.0 6.61 60.9 0.021 < 0.05 < 0.020 < 0.020 0.628 0.545 102 Maximum 13.5 6.82 60.9 0.031 0.100 < 0.020 < 0.020 1.020 1.03 104 Minimum 9.9 6.11 57.5 0.021 < 0.05 < 0.020 < 0.020 0.628 0.545 93 Average 11.7 6.51 59.6 0.027 0.070 < 0.020 < 0.020 0.848 0.854 100 #Tests 4 4 4 0 0 4 4 4 4 4 4 4 Site: SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2021 Total Fecal EC Chloride COD SO4 Color Coli E. coli Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 1/26/2021 154 1.82 1.02 < 1 < 1 5/20/2021 132 1.73 0.967 < 1 < 1 8/18/2021 120 1.80 1.13 < 1 < 1 11/15/2021 136 1.82 1.03 < 1 < 1 Maximum 154 1.82 1.13 < 1 < 1 Minimum 120 1.73 < 0.97 < 1 < 1 Average 136 1.79 1.04 < 1 < 1 #Tests 4 4 0 4 0 4 4 0 Site: GW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2014 To: 2021 Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 14 13.6 6.52 66.5 0.023 0.064 0.038 < 0.010 0.417 0.445 15 13.1 6.55 66.2 0.019 0.057 0.022 < 0.010 0.667 0.607 16 13.2 6.48 66.8 0.027 0.080 0.032 < 0.010 0.407 0.433 17 14.6 6.63 68.0 0.029 0.107 0.034 < 0.010 0.365 0.394 18 12.6 6.45 63.9 0.023 0.063 0.033 < 0.015 0.752 0.718 19 12.1 6.53 63.0 0.020 0.156 0.041 < 0.015 0.445 0.535 20 12.1 6.41 62.5 0.026 0.093 < 0.020 < 0.015 0.876 0.913 21 11.7 6.51 59.6 0.027 0.070 < 0.020 < 0.020 0.848 0.854 Maximum 14.6 6.63 68.0 0.029 0.156 0.041 < 0.020 0.876 0.913 Minimum 11.7 6.41 59.6 0.019 0.057 < 0.020 < 0.010 0.365 0.394 Average 12.9 6.51 64.5 0.024 0.086 0.030 < 0.013 0.597 0.612 #Tests 8 8 8 0 0 8 8 8 8 8 8 Site: GW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2014 To: 2021 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN 14 111 147 3.55 1.74 < 1.1 < 1.1 15 110 150 2.25 1.71 < 1 < 1 16 107 156 2.13 1.33 < 1 < 1 17 102 140 1.82 1.10 < 1 < 1 18 104 141 1.89 1.98 < 1 < 1 19 93 135 1.77 0.82 < 1 < 1 20 100 131 1.73 0.91 < 1 < 1 21 100 136 1.79 1.04 < 1 < 1 Maximum 111 156 3.55 1.98 < 1.1 < 1.1 Minimum 93 131 1.73 0.82 < 1 < 1 Average 103 142 2.12 1.33 < 1 < 1 #Tests 8 8 8 0 8 0 8 8 0 Site GW-17 Nitrate-Nitrogen Chlorides 5 50 4 40 3 30 J J E 2 20 1 10 0 p 14 15 16 17 18 19 20 21 14 15 16 17 18 19 20 21 Nitrate Linear(Nitrate) t Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Coliform Bacteria 500 25 400 20 300 E 15 J O p� O 200 a 10 100 5 p 0 14 15 16 17 18 19 20 21 14 15 16 17 18 19 20 21 TDS Linear(TDS) Total Coliforms Linear(Total Coliforms) Annual Metal Report GW-17 Diamond Valley Ranch House Well Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb Sb se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 9/30/2013 12.0 1.80 3.30 11.0 480 <2 52 <2 <2 <2 <2 <2 360 0.2 37 <2 <2 <10 <2 1 <2 100 10/1/2013 19.0 6.00 8.00 32.0 17000 2 500 2 <2 <2 7 46 16000 <0.1 790 6 22 <10 2 <1 14 220 10/2/2013 17.0 1.50 4.70 15.0 2400 <2 64 <1 <2 <2 <2 6 880 <0.1 44 <2 <2 <10 <2 <1 <2 250 10/23/2013 1380 10/25/2013 98.2 8/12/2014 12.6 1.82 3.51 11.2 <20 <1 47.3 <1 <0.5 <0.5 <1 6.68 374 <0.2 10.5 <2 <5 0.98 <5 <1 <1 <3 532 7/15/2015 12.3 1.75 3.32 9.54 <20 <1 43.4 <1 <0.5 <0.5 <1 <10 206 <0.2 12.6 <2 <5 <0.5 <5 <1 <1 <3 521 11/18/2015 10500 8/10/2016 11.8 1.66 3.39 9.33 <20 <1 45 <1 <0.5 <0.5 <1 5.09 196 <0.2 4.45 <2 <5 <0.5 <5 <1 <1 <3 239 7/27/2017 11.5 1.58 3.2 8.81 <20 <1 43.9 <1 <0.5 <0.5 <1 3.1 284 <0.2 4.88 <2 <5 <0.5 <5 <1 <1 <3 120 8/29/2018 12.8 1.48 3.48 9.52 <20 <1 48 <1 <0.5 <0.5 <1 3.48 86.7 <0.2 5.53 <2 <5 <0.5 <5 <1 <1 <3 83.7 8/14/2019 12.6 1.56 3.38 9.49 <20 <1 46.5 <1 <0.5 <0.5 <1 3.07 111 <0.2 7.77 <2 <5 <0.5 <5 <1 <1 <3 134 8/8/2020 12.0 1.30 3.29 9.02 <20 <1 <1 46.5 <0.5 <0.5 <1 <2 172 <0.2 7.21 <2 <5 <0.5 <5 <1 <1 <3 135 8/18/2021 12.5 1.45 3.37 9.24 <0.5 <20 <1 45.8 <1 <0.5 <1 <2 158 <0.2 7.90 <2 <5 <0.5 <1 <5 <1 <3 63.8 ALPINE COUNTY SURFACEWATERS Site: SW-01 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson R Woodfords ALPINE COUNTY SURFACEWATER QUALITY DATA 2021 Temp Alkalinity Turbidity SS TDS EC Chloride Total P POa-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 01/04/21 3.0 7.35 37.5 0.69 0.59 60 78.4 2.47 0.013 0.01 < 0.10 < 0.020 < 0.010 < 0.010 02/01/21 1.7 7.59 37.2 1.0 3.51 54 79.8 2.00 0.013 < 0.010 < 0.10 < 0.020 < 0.010 < 0.010 03/03/21 1.3 7.38 36.0 0.50 0.45 61 87.0 3.11 0.013 < 0.010 0.10 < 0.020 < 0.010 < 0.010 04/06/21 4.4 7.68 24.4 3.7 8.95 48 56.5 2.93 0.033 0.011 0.252 < 0.020 < 0.010 0.037 05/11/21 9.2 7.64 22.7 1.9 6.37 41 46.2 1.12 0.025 0.01 0.158 < 0.020 < 0.010 < 0.010 06/23/21 14.2 7.59 34.3 0.82 1.88 53 57.5 1.41 0.015 0.013 0.064 < 0.020 < 0.010 < 0.010 07/06/21 16.3 7.62 36.8 2.6 6.75 54 77.8 1.43 0.033 < 0.010 0.146 < 0.020 < 0.010 < 0.010 08/04/21 15.8 7.89 37.2 1.3 2.28 53 83.5 1.38 0.024 0.014 0.149 < 0.020 < 0.010 0.016 09/09/21 13.9 7.71 42.8 0.29 0.71 65 86.9 1.51 0.021 0.022 0.061 < 0.020 < 0.010 0.010 10/06/21 11.2 7.74 41.8 0.44 1.02 65 85.6 1.42 0.018 0.015 < 0.050 < 0.020 < 0.010 < 0.010 11/04/21 6.9 7.59 26.8 0.94 1.24 46 65.1 1.72 0.020 < 0.010 0.149 < 0.020 < 0.010 0.011 12/15/21 0.5 8.12 36.8 0.57 0.84 60 82.0 2.60 0.021 < 0.010 0.090 < 0.020 < 0.010 < 0.010 Maximum 16.3 8.12 42.8 3.70 8.95 65 87 3.11 0.033 0.022 0.252 < 0.020 < 0.010 0.037 Minimum 0.5 7.35 22.7 0.29 0.45 41 46 1.12 < 0.013 < 0.010 < 0.100 < 0.020 < 0.010 < 0.010 Average 8.2 7.66 34.5 1.23 2.88 55 74 1.93 0.021 0.012 0.118 < 0.020 < 0.010 0.013 #Tests 12 12 12 12 12 12 12 12 12 12 0 0 12 12 12 12 Site: SW-01 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson R Woodfords ALPINE COUNTY SURFACEWATER QUALITY DATA 2021 Oil& Coliforms Fecal <----------Blue Green Algae--------->Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E.coli Strep Colonies Filaments Filamament Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 01/04/21 < 0.10 47.2 < 1 11.10 2.05 02/01/21 < 0.10 70.6 3.1 11.34 2.06 03/03/21 0.10 17.5 < 1 7.65 2.72 04/06/21 0.289 196 1.0 10.52 2.76 05/11/21 0.158 115 1.0 9.54 1.52 06/23/21 0.064 285 13.4 8.53 1.81 07/06/21 0.146 866 40.4 8.14 1.84 08/04/21 0.165 1300 9.7 8.22 3.41 09/09/21 0.071 770 1.0 8.29 2.09 10/06/21 < 0.050 461 < 1 8.93 1.94 11/04/21 0.160 488 6.3 10.20 2.44 12/15/21 0.090 88.8 3.1 11.60 2.44 Maximum 0.289 1,300 40.4 0 0 0 0 0 0 0 11.6 3.41 Minimum < 0.050 17.5 < 1 0 0 0 0 0 0 0 7.65 1.52 Average 0.124 392 6.8 9.51 2.26 #Tests 12 0 0 0 0 0 0 0 0 12 12 0 0 0 0 0 0 0 0 12 12 0 Site: SW-01 SOUTH TAHOE PUBLIC UTILITY DISTRICT SW-01 Stream: Carson R Woodfords ALPINE COUNTY SURFACEWATER QUALITY DATA Carson R From: 1981 To: 2021 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO,--P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOO Grease Ca Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 81 8.1 7.70 32 0.68 2 56 71 1.3 0.02 0.01 1.30 0.17 0.04 0.37 5 1 1 82 5.2 7.58 25 1.70 6 46 54 0.02 0.01 0.92 0.09 0.02 0.17 6 1 < 1 83 6.1 7.67 27 2.07 7 46 56 0.5 0.02 0.02 1.03 0.13 0.02 < 0.01 0.02 0.17 5 1 < 1 84 5.7 7.40 30 1.60 5 49 58 0.7 0.03 0.03 1.15 0.22 0.07 < 0.01 0.01 0.24 7 1 < 1 6.02 85 5.8 7.69 33 1.20 3 48 65 0.7 0.02 0.29 1.27 0.14 0.03 < 0.01 0.02 0.17 4 1 < 1 6.89 86 4.7 7.64 27 1.49 5 51 57 0.8 0.03 0.02 1.10 0.13 0.03 < 0.01 0.02 0.16 4 1 < 1 5.80 87 6.8 7.18 35 0.66 2 55 73 0.8 0.02 0.01 1.45 0.15 0.03 < 0.01 0.01 0.17 4 1 < 1 7.31 88 7.0 7.07 35 0.73 2 56 75 1.0 0.01 0.30 1.29 0.15 0.03 < 0.01 0.02 0.18 5 1 < 1 7.86 89 5.7 7.57 30 1.49 5.5 49 71 1.3 0.02 0.02 1.87 0.16 0.03 < 0.01 0.03 0.20 7 1.1 < 1 6.76 90 7.4 7.68 33 0.97 4.2 53 80 1.1 0.02 0.01 0.02 1.34 0.11 0.02 < 0.01 0.02 0.15 5 1.0 < 1 7.51 91 7.8 7.71 33 1.37 5.2 53 75 1.2 0.03 0.01 0.02 1.32 0.13 0.03 0.01 0.03 0.17 9 1.1 < 1 7.36 92 8.0 7.99 34 0.90 2.3 58 81 1.2 0.02 0.01 0.02 1.27 0.14 0.03 0.01 0.02 0.17 8 1.3 1 8.12 93 6.2 7.95 30 1.67 5.8 53 68 1.4 0.03 0.01 0.02 1.20 0.33 0.03 0.01 0.03 0.36 11 1.4 < 1 7.22 94 6.4 7.61 34 0.71 2.1 56 78 1.1 0.02 0.01 0.02 1.35 0.19 0.03 0.01 0.01 0.21 < 5 1.0 1 7.58 95 5.3 7.52 27 1.68 10.8 49 64 1.2 0.03 0.01 0.02 1.23 0.20 0.04 0.01 0.02 0.23 8 1.3 1 6.58 96 6.5 7.47 28 1.11 4.8 53 61 1.0 0.02 0.01 0.01 1.20 0.21 0.02 0.01 0.04 0.26 6 1.1 1 6.38 97 6.0 7.24 29 0.83 2.1 49 62 1.0 0.07 0.01 0.01 1.21 0.19 0.05 0.01 0.09 0.29 5 1.0 4 6.63 98 5.1 6.87 29 1.28 4.4 49 62 1.3 0.03 0.01 0.02 1.21 0.18 0.03 0.01 0.03 0.22 5 1.0 < 1 6.20 99 5.9 7.17 29 0.68 2.7 53 70 1.4 0.02 < 0.01 0.01 1.33 0.17 0.03 < 0.01 0.03 0.21 < 5 1.1 6.60 00 5.8 7.24 31 1.60 9.1 54 61 1.3 0.03 0.01 0.02 1.32 0.20 0.02 < 0.01 0.01 0.22 5 1.2 5.92 01 6.3 7.10 33 1.42 3.8 56 72 1.4 0.02 0.02 0.01 1.41 0.16 0.02 < 0.01 0.01 0.19 15 1.1 7.20 02 5.6 7.38 32 1.48 2.8 57 70 1.7 0.02 0.01 0.01 1.30 0.24 0.03 < 0.01 0.02 0.26 5 0.7 6.93 03 5.1 7.48 31 5.09 10.9 54 67 1.7 0.02 0.01 0.02 1.29 0.18 0.03 0.01 0.02 0.21 6 0.9 6.91 04 5.4 7.25 31 4.28 9.5 55 66 1.8 0.03 0.02 0.02 1.28 0.16 0.04 0.01 0.02 0.18 9 0.8 6.70 05 4.9 7.35 32 2.13 5.7 57 55 2.2 0.02 0.01 0.02 1.26 0.15 0.02 < 0.01 0.03 0.19 12 1.2 7.01 06 5.1 7.06 26 2.94 6.3 49 40 1.4 0.02 0.01 0.02 1.10 0.11 0.03 < 0.01 0.02 0.13 10 1.2 5.98 07 6.7 7.28 31 1.77 3.8 57 65 1.4 0.01 0.01 0.01 1.36 0.25 0.02 < 0.01 0.02 0.28 9 1.1 7.19 08 5.8 7.87 32 1.44 2.4 54 69 1.6 0.01 0.01 0.01 1.33 0.14 < 0.02 < 0.01 0.01 0.17 9 1.0 7.27 09 5.0 7.43 31 3.17 4.4 54 66 1.3 0.02 0.01 0.01 1.27 0.17 < 0.02 < 0.01 0.01 0.19 8 0.9 7.08 10 4.5 7.34 30 2.68 5.1 53 66 1.3 0.02 0.01 < 0.01 1.30 0.09 < 0.02 < 0.01 0.01 0.12 12 1.8 6.92 11 4.1 7.53 29 3.22 5.9 53 59 1.0 0.02 0.01 0.01 1.16 0.09 < 0.04 < 0.01 0.03 0.12 7 1.3 6.27 12 5.8 6.98 34 1.56 2.5 56 70 1.1 0.02 0.01 0.01 1.42 0.13 0.02 < 0.01 0.01 0.16 1.4 7.40 13 5.8 6.91 32 1.54 2.7 53 67 1.1 0.02 0.01 0.01 1.20 0.14 0.03 < 0.01 0.01 0.14 1.1 7.33 14 5.8 7.27 35 1.06 2.7 58 78 1.3 0.02 0.01 0.01 1.38 0.12 0.03 < 0.01 0.01 0.12 1.1 7.84 15 6.5 6.78 35 1.22 2.3 58 76 1.2 0.02 0.01 0.01 1.34 0.12 0.02 < 0.01 0.01 0.12 8.28 16 5.5 6.96 30 2.24 5.6 57 66 1.4 0.03 0.01 1.23 0.14 0.02 < 0.01 0.03 0.17 7.27 17 5.6 7.10 28 2.57 6.0 51 58 1.0 0.03 0.01 1.04 0.14 0.02 < 0.01 0.01 0.15 6.53 18 6.7 7.50 33 1.35 2.4 54 67 1.1 0.03 0.01 0.27 0.02 < 0.01 0.01 0.28 19 5.6 7.33 31 1.83 2.7 51 67 1.9 0.02 0.02 0.12 < 0.02 < 0.01 0.01 0.13 20 6.1 7.63 34 0.83 1.9 58 71 1.6 0.02 0.01 0.24 < 0.02 < 0.01 0.01 0.24 21 8.2 7.66 35 1.23 2.9 55 74 1.9 0.02 0.01 0.12 < 0.02 < 0.01 0.01 0.12 Maximum 8.2 7.99 35 5.09 10.9 58 81 2.2 0.07 0.02 0.30 1.87 0.33 0.07 0.01 0.09 0.37 15 1.8 4 8.28 Minimum 4.1 6.78 25 0.66 1.9 46 40 0.5 0.01 < 0.01 0.01 0.92 0.09 < 0.02 < 0.01 0.01 0.12 4 0.7 < 1 5.80 Average 6.0 7.39 31 1.69 4.5 53 67 1.3 0.02 0.01 0.03 1.27 0.16 0.03 0.01 0.02 0.19 7 1.1 1 6.97 #Tests 41 41 41 41 41 41 41 40 41 32 35 37 41 41 39 39 41 31 34 18 34 Site: SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Woodfords ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2021 Coliforms Fecal/ Fecal <--------------------------Blue Green Algae-------------------------------> Single Hard- Mg Na SAR Na Total E.coli Strap <------Colonies------> <-----Filaments------> <---Filamaments---> Cells D.O. SO4 ness Year mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 81 307 226 184 23 208 27 221 8 487 3 82 123 38 31 16 77 50 731 17 445 26 83 260 135 47 22 427 92 1,015 35 790 22 9.87 < 0.01 25 84 1.71 2.71 0.25 19.7 419 55 48 293 4 61 970 226 2,220 52 9.38 1.17 25 85 1.84 3.11 0.27 20.1 165 45 48 0 0 286 43 196 10 0 9.92 0.73 27 86 1.64 2.55 0.24 19.4 175 43 100 0 0 45 92 92 3 69 10.42 9.57 23 87 2.03 3.54 0.29 21.1 140 74 37 0 0 46 623 139 3 27,077 9.78 4.88 27 88 2.20 3.69 0.29 20.7 294 < 30 43 0 0 0 0 1,085 54 0 11.71 3.61 89 1.82 2.93 0.25 18.7 271 48 285 0 0 0 0 439 22 231 10.23 3.82 90 2.05 3.48 0.29 20.5 163 50 156 0 0 0 0 0 0 0 9.25 3.97 25 91 2.00 3.43 0.28 20.7 153 37 40 0 0 6 115 0 0 0 8.94 4.08 23 92 1.98 3.58 0.28 20.3 164 26 130 0 0 0 0 0 0 0 9.88 4.16 26 93 1.88 3.33 0.28 20.4 176 41 40 0 0 15 50 0 0 0 10.02 3.86 22 94 1.95 3.82 0.31 22.2 118 32 37 0 0 0 4 0 0 0 9.94 4.70 25 95 1.81 3.28 0.28 21.4 73 31 35 0 0 0 33 0 0 0 10.24 4.32 21 96 1.68 3.11 0.27 21.4 142 33 35 0 0 0 0 0 0 0 10.56 2.34 22 97 1.83 3.30 0.29 21.7 75 30 130 0 0 0 0 0 0 0 10.75 2.81 25 98 1.68 3.14 0.28 21.9 67 31 60 0 0 29 179 0 0 0 9.44 2.27 19 99 1.81 3.47 0.31 22.5 110 32 130 0 0 3 29 0 0 0 10.10 2.37 00 1.84 3.46 0.32 23.7 38 < 28 < 30 0 0 0 0 0 0 0 10.24 2.30 01 1.97 3.84 0.32 23.0 44 16 < 30 0 0 0 0 0 0 0 9.58 2.02 02 1.90 3.86 0.33 23.7 37 9 107 0 0 4 113 0 0 0 9.37 2.15 03 1.90 3.63 0.31 22.7 65 21 21 0 0 0 0 0 0 0 10.06 2.04 04 1.92 3.54 0.31 22.4 60 5 22 0 0 0 0 0 0 0 9.93 1.99 05 1.87 3.55 0.30 22.0 26 11 8 0 0 94 782 0 0 0 10.74 2.09 06 1.64 3.08 0.28 22.2 119 54 < 3 0 0 0 0 0 0 0 10.24 1.39 07 1.93 3.84 0.32 22.9 23 6 < 26 0 0 0 0 0 0 0 9.59 1.85 08 1.90 3.79 0.32 22.7 40 4 117 0 0 0 0 0 0 0 10.30 2.32 09 1.87 3.58 0.31 22.2 244 16 4 0 0 0 0 0 0 0 10.14 2.03 10 1.90 3.44 0.30 21.6 228 32 < 3 0 0 3 85 0 0 0 9.28 1.99 11 1.70 3.12 0.28 21.6 70 22 4 0 0 3 28 0 0 0 10.52 1.38 12 1.94 3.71 0.31 21.9 63 14 6 0 0 0 0 0 0 0 9.67 1.90 13 1.80 3.46 0.29 21.4 480 10 4 0 0 0 0 0 0 0 10.52 2.25 14 2.03 4.05 0.33 22.8 518 25 4 0 0 0 0 0 0 0 9.75 2.18 15 2.08 3.96 0.32 21.8 588 7 10.44 2.22 16 1.81 3.55 0.30 21.9 330 3 11.69 1.94 17 1.70 3.06 0.27 21.1 218 5 10.52 1.29 18 345 4 10.31 1.67 19 180 3 10.47 1.66 20 117 2 10.80 1.74 21 392 7 9.51 2.26 Maximum 2.20 4.05 0.33 23.7 588 226 285 293 427 286 1,015 1,085 2,220 27,077 11.71 9.57 27 Minimum 1.64 2.55 0.24 18.7 23 2 3 0 0 0 0 0 0 0 8.94 < 0.01 19 Average 1.87 3.44 0.29 21.6 186 33 59 10 21 22 150 66 119 808 10.10 2.60 24 #Tests 34 34 34 34 41 41 34 34 34 34 34 34 34 34 39 39 14 Site : SW-01 Nitrate-Nitrogen Total Phosphorus 0.5 0.5 0.4 0.4 0.3 0.3 J J 0.2 0.2 0.1 0.1 0.0 0.0 O^ OA Oh O� 00 O^ 00 00 01 Oc' O^ 00 05 01 Oc' ^^ ^A ^h 41 ^O ry^ O^ 0A 01, 01 19b O^ 00 05 01 0' O^ OA Oy O� 00 t Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 10 — 250 9 8 200 7 6 150 J J rn 5 a1 £ 4 £ 100 3 2 50 1 0 O 8182 83 84 85 86 87 88 89 90 9192 93 94 95 96 97 98 99 00 0102 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 O^ 0`� gh 01 00 0�^ q, Oh q, qI O^ O'3 p`'� OZ\ 00 ^^ ^`3 ^h ^1 ^O ry^ Chlorides Linear(Chlorides) TDS Linear(TDS) Site: SW-02 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek, Upper ALPINE COUNTY SURFACEWATER QUALITY DATA 2021 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 03/03/21 1.8 7.47 35.1 1.6 0.14 59 74.0 1.85 0.013 0.010 0.17 < 0.020 < 0.010 < 0.010 04/06/21 6.2 7.62 40 1.6 2.62 71 82.3 2.17 0.013 0.011 0.251 < 0.020 < 0.010 < 0.010 05/11/21 13.3 7.94 45.5 1.3 0.44 74 90.5 2.11 0.025 0.016 0.142 < 0.020 < 0.010 < 0.010 06/23/21 Dry 07/06/21 Dry 08/04/21 Dry 09/09/21 Dry 10/06/21 Dry 11/04/21 10.5 7.66 54.9 0.95 5.81 100 152 2.4 0.057 0.035 0.284 < 0.020 < 0.010 < 0.010 Maximum 13.3 7.94 54.9 1.6 5.8 100 152 2.40 0.057 0.035 0.284 < 0.020 < 0.010 < 0.010 Minimum 1.8 7.47 35.1 1.0 0.14 59 74 1.850 0.013 0.010 0.142 < 0.020 < 0.010 < 0.010 Average 8.0 7.67 43.9 1.4 2.25 76 100 2.13 0.027 0.018 0.212 < 0.020 < 0.010 < 0.010 #Tests 4 4 4 4 4 4 4 4 4 4 0 0 4 4 4 4 Site: SW-02 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek, Upper ALPINE COUNTY SURFACEWATER QUALITY DATA 2021 Oil & Coliforms Fecal <-----Blue Green Algae----> Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep Colonies Filament:Filamar Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 03/03/21 0.17 41.4 < 1 7.37 0.829 04/06/21 0.251 47.3 < 1 9.13 0.771 05/11/21 0.142 291 < 1 4.99 0.736 06/23/21 07/06/21 08/04/21 09/09/21 10/06/21 11/04/21 0.354 770 62.4 8.91 12.6 Maximum 0.354 770 62 0 0 0 0 0 0 0 9.13 12.60 Minimum 0.142 41 < 1 0 0 0 0 0 0 0 4.99 < 0.74 Average 0.229 287 16 7.60 3.73 #Tests 4 0 0 0 0 0 0 0 0 4 4 0 0 0 0 0 0 0 0 4 4 0 Site: SW-02 SOUTH TAHOE PUBLIC UTILITY DISTRICT SW-0 Stream: Indian Creek,Upper ALPINE COUNTY SURFACEWATER QUALITY DATA Indiai From: 1981 To: 2021 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Total N COD Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 81 13.8 7.33 54 6.50 3 109 162 1.8 0.05 0.01 1.94 0.41 0.10 0.60 9 < 82 83 8.6 7.56 39 5.13 3 72 69 0.7 0.02 0.04 1.40 0.25 0.05 <0.01 0.01 0.18 8 84 8.4 7.71 40 2.36 6 64 76 0.8 0.03 0.02 1.48 0.49 0.05 <0.01 <0.01 0.51 9 85 86 87 5.2 7.55 48 2.20 1 70 80 1.1 0.02 <0.01 1.50 0.17 <0.02 <0.01 0.02 0.22 6 88 6.3 6.90 46 1.97 1 81 92 1.2 0.02 0.01 1.25 0.19 0.03 <0.01 0.01 0.20 9 89 5.9 7.47 44 2.86 2.0 79 94 1.3 0.02 0.02 1.30 0.20 0.02 <0.01 0.02 0.23 9 90 4.5 7.42 44 2.82 2.0 77 108 1.1 0.02 0.01 1.32 0.14 0.02 <0.01 0.01 0.17 8 91 7.9 8.10 47 4.90 2.3 81 106 1.7 0.03 0.01 0.01 1.57 0.25 0.03 0.01 0.01 0.28 9 92 9.0 7.52 54 4.01 4.3 90 105 1.4 0.05 0.01 0.02 1.51 0.28 0.03 0.01 0.02 0.31 9 93 8.7 7.51 44 3.06 1.1 80 93 1.8 0.04 0.02 0.02 1.64 0.36 0.02 0.01 0.02 0.39 24 94 5.5 7.14 47 3.09 1.0 79 97 1.4 0.03 0.01 0.02 1.37 0.26 0.02 0.01 0.02 0.29 <5 95 8.4 7.63 44 2.51 1.4 79 90 1.4 0.03 0.02 0.01 1.48 0.28 0.05 0.01 0.02 0.31 8 96 9.5 7.45 52 3.37 2.9 82 104 1.9 0.04 0.01 0.01 1.79 0.32 0.02 0.01 0.03 0.36 7 97 8.2 7.43 57 4.38 13.2 86 111 0.9 0.06 0.01 0.02 1.70 0.32 0.02 0.01 0.10 0.43 9 98 7.5 7.30 55 2.35 2.2 85 109 1.0 0.03 0.01 0.01 1.58 0.26 0.02 <0.01 0.02 0.29 5 99 8.5 7.19 52 2.03 1.9 81 104 0.9 0.03 0.01 0.02 1.53 0.24 0.02 <0.01 0.02 0.27 6 00 9.3 7.28 58 1.63 1.2 88 109 1.3 0.04 0.01 0.02 1.63 0.25 0.02 <0.01 <0.01 0.25 7 01 5.0 7.29 50 2.04 1.8 82 98 1.5 0.02 0.03 0.01 1.33 0.25 0.02 <0.01 0.02 0.27 20 02 6.9 7.14 45 2.19 3.5 78 91 1.7 0.02 0.01 0.02 1.49 0.26 0.03 <0.01 0.03 0.30 <5 03 9.4 7.55 45 1.63 1.0 78 85 1.4 0.02 0.01 0.03 1.48 0.22 0.02 0.01 0.01 0.24 7 04 8.6 7.23 46 2.17 1.5 77 89 1.4 0.02 <0.01 0.02 1.45 0.21 0.03 <0.01 <0.01 0.23 7 05 8.6 7.27 46 1.73 1.1 77 80 1.8 0.02 0.01 0.02 1.35 0.28 0.02 <0.01 0.01 0.30 12 06 9.1 6.92 44 2.38 3.0 76 69 1.0 0.03 0.01 0.02 1.42 0.16 0.02 <0.01 <0.01 0.18 10 07 9.4 7.51 50 1.77 0.7 81 98 1.2 0.03 0.01 0.01 1.52 0.16 0.05 <0.01 <0.01 0.19 8 08 7.9 7.59 45 1.77 2.0 72 89 1.7 0.03 0.01 <0.01 1.59 0.15 <0.02 <0.01 0.01 0.18 8 09 9.4 7.20 46 2.20 1.0 80 92 1.2 0.02 0.01 <0.01 1.72 0.30 <0.02 <0.01 <0.01 0.32 19 10 8.3 7.35 40 2.33 1.2 72 84 1.0 0.03 0.01 <0.01 1.72 0.17 <0.02 <0.01 <0.01 0.19 13 11 9.2 7.58 48 3.99 2.5 85 93 1.3 0.04 0.01 0.01 2.29 0.25 0.02 <0.01 0.01 0.28 12 12 9.4 7.17 55 1.72 1.6 84 105 0.7 0.03 0.01 <0.01 1.53 0.18 0.02 <0.01 <0.01 0.20 13 6.1 6.95 44 1.34 0.1 75 85 0.9 0.04 0.01 0.01 1.29 0.16 0.02 <0.01 0.01 0.17 14 5.9 7.01 39 2.57 1.4 73 80 1.3 0.02 0.01 0.02 1.47 0.19 0.02 <0.01 0.01 0.20 15 5.9 6.94 41 3.20 0.4 84 87 0.9 0.02 0.01 0.01 1.44 0.22 <0.02 <0.01 0.01 0.22 16 9.7 7.10 46 2.03 0.6 87 101 1.7 0.03 0.01 1.54 0.19 <0.02 <0.01 <0.01 0.20 17 10.0 7.18 42 1.66 0.7 70 83 1.0 0.02 0.01 1.51 0.15 0.02 <0.01 <0.01 0.16 18 9.7 7.47 55 2.57 0.8 85 106 1.0 0.04 0.02 0.15 0.02 <0.01 0.01 0.15 19 9.4 7.32 44 2.87 1.1 72 96 1.2 0.03 0.01 0.15 <0.02 <0.01 0.01 0.15 20 7.7 7.85 52 2.18 4.5 79 99 0.9 0.02 0.01 0.46 <0.02 <0.01 <0.01 0.46 21 8.0 7.67 44 1.36 2.3 76 100 2.1 0.03 0.02 0.21 <0.02 <0.01 <0.01 0.23 Maximum 13.8 8.10 58 6.50 13.2 109 162 2.1 0.06 0.03 0.04 2.29 0.49 0.10 0.01 0.10 0.60 24 Minimum 4.5 6.90 39 1.34 0.1 64 69 0.7 0.02 <0.01 <0.01 1.25 0.14 <0.02 <0.01 <0.01 0.15 <5 Average 8.1 7.36 47 2.65 2.2 80 95 1.3 0.03 0.01 0.02 1.53 0.24 0.03 0.01 0.02 0.27 10 #Tests 38 38 38 38 38 38 38 38 38 31 32 34 38 38 37 37 38 28 Site: 2 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: n Creek,Upper ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2021 Oil& Coliforms Fecal/ Fecal <--------------------------Blue Green Algae-------------------------------> Single Hard- BOD Grease Ca Mg Na SAR Na Total E.coli Strap <-----Colonies---> <-----Filaments------> <---Filamaments---> Cells D.O. SO4 ness Year mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 81 1 <1 3,820 283 2,315 5 10 37 452 0 0 2 82 83 1 <1 336 73 33 0 0 6 32 2 30 0 8.85 2.34 32 84 1 <1 7.77 1.95 4.48 0.37 24.8 3,140 122 180 155 105 3 5 347 209 44 8.61 1.10 29 85 86 87 1 < 1 9.80 2.50 7.10 0.52 29.6 40 <30 <30 0 0 0 0 0 0 0 9.10 3.40 88 1 < 1 9.15 2.38 6.77 0.51 30.1 107 32 90 0 0 92 877 46 1 92 9.43 3.58 89 1.0 < 1 8.50 2.06 6.85 0.55 32.4 86 31 58 0 0 79 1,968 35 213 0 9.28 3.77 90 1.2 < 1 8.77 2.15 6.93 0.54 31.9 112 30 72 0 0 0 0 0 0 323 7.53 3.75 33 91 1.1 < 1 9.24 2.29 7.10 0.54 30.9 130 40 40 0 0 0 0 0 0 0 7.41 4.35 30 92 1.4 1 10.99 2.49 8.08 0.57 31.2 372 73 150 5 91 86 201 0 0 0 8.82 4.55 38 93 1.2 < 1 9.25 2.29 7.05 0.54 31.0 810 261 150 0 0 4 95 0 0 0 8.15 4.09 28 94 1.0 < 1 9.24 2.30 7.97 0.61 33.8 753 31 90 0 0 0 0 0 0 0 8.13 5.04 58 95 1.2 1 9.08 2.15 6.15 0.48 28.9 793 243 230 0 0 0 0 0 0 0 8.81 4.35 30 96 1.2 1 10.77 2.67 7.07 0.49 27.8 1,956 529 770 0 0 0 0 0 0 0 8.53 2.93 35 97 1.1 3 12.43 3.10 7.21 0.46 25.9 1,567 497 155 0 0 3 53 0 0 0 8.74 3.36 45 98 1.0 < 1 11.23 2.74 6.51 0.46 26.1 982 562 160 0 0 0 0 0 0 0 8.92 2.63 42 99 1.0 10.56 2.64 6.47 0.46 26.6 863 90 <30 0 0 0 0 0 0 0 8.34 2.99 00 0.9 10.88 2.82 7.41 0.52 28.6 434 79 65 0 0 0 0 0 0 0 7.76 1.31 01 1.1 9.49 2.39 7.68 0.58 32.4 128 73 90 0 0 0 0 0 0 0 8.70 0.63 02 0.8 8.02 2.10 7.72 0.64 36.0 81 13 68 0 0 41 375 0 0 0 8.55 0.70 03 0.8 8.38 2.20 6.48 0.52 31.1 141 35 33 0 0 0 0 0 0 0 7.34 0.59 04 1.1 8.47 2.20 6.45 0.52 31.2 271 27 68 0 0 0 0 0 0 0 7.97 0.67 05 1.8 8.39 2.18 6.23 0.50 30.4 220 84 220 0 0 0 0 0 0 0 8.60 0.47 06 1.0 8.59 2.16 5.87 0.46 28.7 746 320 235 0 0 0 0 0 0 0 7.30 0.43 07 1.0 9.56 2.41 8.01 0.60 33.0 673 145 97 0 0 0 0 0 0 0 7.99 0.65 08 0.9 8.52 2.06 7.06 0.57 32.8 111 20 68 0 0 5 15 0 0 0 7.83 0.61 09 0.8 8.76 2.16 7.30 0.58 33.3 2,024 96 43 0 0 0 0 0 0 0 6.86 0.46 10 1.3 8.04 2.09 6.17 0.51 30.8 1,631 186 4 0 0 3 65 0 0 0 5.80 0.60 11 1.5 8.95 2.36 6.82 0.53 30.1 1,768 1,412 19 0 0 0 0 0 0 0 7.95 <0.50 12 1.4 10.36 2.50 7.86 0.57 31.2 323 186 3 0 0 0 0 0 0 0 6.48 <0.50 13 1.2 7.88 1.93 7.80 0.65 36.9 44 20 3 0 0 0 0 0 0 0 8.09 0.58 14 1.3 6.81 1.69 7.95 0.71 40.1 110 4 4 0 0 0 0 0 0 0 8.71 1.00 15 6.97 1.78 9.24 0.81 43.3 359 3 7.19 1.40 16 8.76 2.14 8.27 0.66 36.4 1,022 9 8.57 1.06 17 8.40 2.02 5.81 0.47 29.2 778 45 8.96 <0.50 18 717 35 8.53 <0.70 19 525 117 8.82 <0.57 20 237 19 8.77 0.52 21 287 16 7.60 3.73 Maximum 1.8 3 12.43 3.10 9.24 0.81 43.3 3,820 1,412 2,315 155 105 92 1,968 347 213 323 9.43 5.04 58 Minimum 0.8 <1 6.81 1.69 4.48 0.37 24.8 40 3 3 0 0 0 0 0 0 0 5.80 0.43 28 Average 1.1 1 9.13 2.28 7.06 0.55 31.5 750 155 180 5 7 12 133 14 15 15 8.19 1.90 36 #Tests 31 15 32 32 32 32 32 38 38 31 31 31 31 31 31 31 31 37 37 11 Site : SW-02 Nitrate-Nitrogen Total Phosphorus 0.5 0.5 0.4 0.4 0.3 0.3 J J � Ol E E 0.2 0.2 0.1 0.1 0.0 0.0 O, OA 0 4A 00 O, Ob Oy 01 0' Is, OA Oy 01 Oq '�� A �h '�� O ry� q�, 0A 0y 01 19, O� O� Ob 01 O°' O^ OA Oy O� 00 '�^ ^O 41 t Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 10 250 9 8 200 7 6 150 J J rn 5 a� £ 4 £ 100 3 2 50 1 0 0 8182 83 84 85 86 87 88 89 90 9192 93 94 95 96 97 98 99 00 0102 03 04 05 06 07 08 0910 11 12 13 14 15 16 17 18 19 20 21 Ory Oh 9� O°'' O^ Ory O� O^ 00 N Chlorides Linear(Chlorides) TDS Linear(TDS) Site: SW-03 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek, Mid ALPINE COUNTY SURFACEWATER QUALITY DATA 2021 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 03/03/21 1.9 7.71 37.0 4.4 14.0 165 87.0 3.00 0.036 < 0.010 0.14 < 0.020 < 0.010 < 0.010 04/06/21 8.8 6.86 56.6 2.3 1.51 93 119 3.25 0.048 < 0.010 0.267 < 0.020 < 0.010 0.021 05/11/21 14.5 7.35 86.9 3.7 7.23 125 177 3.32 0.070 0.023 0.145 < 0.020 < 0.010 0.013 06/23/21 19.6 7.50 90.0 13 28.4 133 195 3.75 0.145 0.043 0.443 0.096 < 0.010 0.026 07/06/21 16.8 7.30 94.3 5.1 4.28 133 189 3.48 0.096 0.022 0.200 < 0.020 < 0.010 0.024 08/04/21 18.9 7.44 117 3.9 3.12 158 241 4.33 0.119 0.042 0.248 < 0.020 < 0.010 0.015 09/09/21 15.8 7.24 111 3.5 5.92 155 228 4.30 0.155 0.030 0.196 < 0.020 < 0.010 0.016 10/06/21 11.6 7.27 110 2.7 2.49 151 194 4.45 0.076 0.029 0.066 < 0.020 < 0.010 0.017 11/04/21 8.4 7.73 27.4 9.8 27.9 51 67.2 1.69 0.076 < 0.010 0.278 < 0.020 < 0.010 < 0.010 Maximum 19.6 7.73 117 13.0 28.4 165 241 4.45 0.155 0.043 0.443 0.096 < 0.010 0.026 Minimum 1.9 6.86 27.4 2.3 1.51 51 67.2 1.69 0.036 < 0.010 0.066 < 0.020 < 0.010 < 0.010 Average 12.9 7.38 81.1 5.4 10.54 129 166 3.51 0.091 0.024 0.220 0.028 < 0.010 0.017 #Tests 9 9 9 9 9 9 9 9 9 9 0 0 9 9 9 9 Site: SW-03 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek, Mid ALPINE COUNTY SURFACEWATER QUALITY DATA 2021 Oil & Coliforms Fecal <--Blue Green Algae-> Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep Colonies Filaments Filamarr Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 03/03/21 0.14 43.5 15.6 7.84 2.73 04/06/21 0.288 93.3 < 1 9.01 2.81 05/11/21 0.158 326 53.8 8.36 2.66 06/23/21 0.469 57900 19400 6.25 2.11 07/06/21 0.224 12000 2590 6.76 1.82 08/04/21 0.263 5830 156 7.00 2.09 09/09/21 0.212 21300 866 7.08 1.65 10/06/21 0.083 > 2,420 57.3 7.89 1.86 11/04/21 0.278 1146 78.4 9.64 2.45 Maximum 0.469 57,900 19,400 0 0 0 0 0 0 0 9.64 2.8 Minimum 0.083 44 1.0 0 0 0 0 0 0 0 6.25 1.65 Average 0.235 11,229 2,580 7.76 2.24 #Tests 9 0 0 0 0 0 0 0 0 9 9 0 0 0 0 0 0 0 0 9 9 0 Site: SW-03 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek,Mid ALPINE COUNTY SURFACEWATER QUALITY DATA From 1981 To: 2021 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Ca Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 81 9.7 7.43 67 3.70 3 229 390 3.6 0.06 0.08 3.14 0.34 0.04 1.07 7 1 1 82 10.1 7.42 62 5.15 6 158 233 0.11 0.08 3.20 0.45 0.02 0.61 15 1 1 83 7.2 8.41 62 7.17 7 145 221 25.3 0.12 0.08 2.80 0.46 0.07 <0.01 0.45 0.45 14 1 <1 84 7.5 7.47 60 4.20 4 109 154 11.7 0.11 0.02 2.31 0.41 0.12 0.01 0.09 0.50 13 2 1 13.50 85 10.4 7.43 46 4.40 5 110 125 8.4 0.14 0.04 3.03 0.46 0.06 <0.01 0.02 0.48 16 2 <1 10.93 86 5.5 7.77 57 4.70 2 115 176 14.6 0.07 0.04 1.97 0.08 <0.02 <0.01 0.12 0.22 6 1 <1 14.80 87 8.8 7.18 71 3.03 4 149 230 20.7 0.06 0.06 2.00 0.19 0.02 <0.01 0.13 0.33 5 1 1 20.07 88 9.9 7.13 81 16.71 11 168 241 18.6 0.11 0.08 2.43 0.35 0.07 <0.01 0.03 0.38 8 1 < 1 20.05 89 9.2 7.43 78 6.48 4.7 126 183 8.9 0.08 0.03 1.63 0.23 0.03 <0.01 0.02 0.26 6 1.2 < 1 15.81 90 8.9 7.49 74 5.42 3.3 114 195 5.8 0.08 0.03 0.04 1.61 0.17 0.02 <0.01 0.03 0.21 7 1.1 < 1 14.24 91 10.3 7.42 95 8.64 5.1 146 202 7.7 0.11 0.02 0.04 2.35 0.32 0.06 0.01 0.06 0.39 9 1.3 < 1 18.44 92 10.6 7.47 103 8.20 4.0 151 216 6.1 0.12 0.03 0.05 2.05 0.29 0.05 0.01 0.02 0.32 12 1.3 1 19.92 93 9.8 7.33 85 7.77 3.8 146 213 8.1 0.11 0.04 0.04 2.24 0.38 0.04 0.01 0.02 0.42 14 1.8 < 1 20.12 94 9.9 7.40 104 10.91 4.3 154 234 8.6 0.13 0.03 0.03 1.81 0.35 0.03 0.01 0.02 0.38 <5 1.8 < 1 20.83 95 10.4 7.47 87 7.30 3.0 141 204 7.7 0.11 0.11 0.03 2.17 0.42 0.04 0.01 0.06 0.49 13 1.4 1 18.92 96 11.3 7.20 63 5.07 5.3 97 137 3.5 0.09 0.03 0.02 1.95 0.34 0.03 0.01 0.06 0.41 5 1.3 1 13.62 97 9.9 7.38 83 6.68 8.4 132 192 7.3 0.11 0.03 0.04 1.98 0.34 0.05 0.01 0.14 0.49 14 1.3 1 16.47 98 8.8 7.01 64 4.44 5.0 104 143 3.8 0.08 0.04 0.02 1.84 0.29 0.02 <0.01 0.04 0.34 <5 1.1 < 1 13.02 99 10.3 7.02 61 5.18 3.9 97 130 2.6 0.10 0.04 0.01 1.81 0.27 0.02 <0.01 0.03 0.32 <5 1.0 11.96 00 10.7 7.24 74 6.81 12.8 115 154 3.9 0.08 0.02 0.03 1.91 0.32 0.02 <0.01 0.03 0.35 <5 1.3 14.32 01 11.7 7.21 83 2.95 3.1 121 171 3.4 0.07 0.02 0.03 1.85 0.19 0.03 <0.01 0.02 0.22 14 1.0 15.04 02 11.7 7.15 100 7.82 7.8 142 199 4.0 0.11 0.02 0.03 2.36 0.38 0.04 <0.01 0.02 0.41 <5 1.7 19.14 03 11.6 7.41 83 9.23 8.5 123 165 3.4 0.12 0.02 0.03 2.10 0.34 0.04 0.01 0.01 0.37 7 1.8 15.50 04 11.2 7.21 88 7.36 8.5 130 174 3.9 0.11 0.01 0.04 2.07 0.28 0.04 <0.01 0.01 0.31 5 1.2 16.99 05 9.9 7.24 81 4.74 3.7 127 152 3.9 0.09 0.02 0.03 1.74 0.23 0.04 <0.01 0.03 0.27 9 1.6 16.97 06 9.5 7.08 52 9.39 12.2 90 87 2.2 0.08 0.02 0.05 1.45 0.17 0.03 <0.01 0.02 0.20 7 1.3 10.70 07 10.4 7.49 83 4.53 5.4 121 157 3.2 0.08 0.02 0.02 2.06 0.18 0.02 <0.01 0.01 0.21 5 1.7 16.02 08 9.4 7.84 70 5.07 5.4 113 155 3.2 0.12 0.04 0.02 2.08 0.34 0.04 <0.01 0.01 0.36 9 2.0 14.96 09 9.3 7.58 75 4.31 2.6 115 158 2.8 0.07 0.02 0.02 1.95 0.21 <0.02 <0.01 0.02 0.23 6 1.0 15.07 10 8.6 7.39 59 6.17 9.2 95 124 2.3 0.08 0.02 0.01 1.75 0.18 0.03 <0.01 0.02 0.21 14 1.3 12.60 11 9.5 7.51 38 11.66 20.2 68 75 1.1 0.11 0.01 0.01 1.53 0.24 0.02 <0.01 0.03 0.28 12 2.6 7.94 12 11.1 7.38 71 3.01 2.8 108 138 2.3 0.07 0.02 0.01 1.70 0.16 0.03 <0.01 0.01 0.18 1.4 13.86 13 11.6 7.21 57 12.36 11.5 90 115 1.7 0.08 0.03 0.01 1.72 0.25 0.04 <0.01 0.01 0.25 1.4 12.15 14 9.6 7.20 57 4.00 8.3 94 114 2.0 0.08 0.04 0.01 2.10 0.27 0.04 0.02 0.03 0.31 2.0 12.17 15 11.7 7.22 79 4.08 12.7 119 160 2.6 0.09 0.04 0.02 1.79 0.25 0.05 <0.01 0.02 0.27 16.54 16 10.5 7.01 60 16.58 33.7 100 126 2.4 0.18 0.02 1.65 0.29 0.02 <0.01 0.03 0.32 13.20 17 12.8 6.99 58 6.03 4.4 94 126 2.9 0.06 0.01 1.61 0.19 0.03 <0.01 0.08 0.26 12.48 18 12.7 7.30 71 4.23 5.5 109 146 3.5 0.07 0.03 0.15 0.02 <0.01 0.06 0.21 19 11.2 7.52 52.1 4.44 5.16 87 114 2.38 0.06 0.017 0.181 <0.020 <0.010 0.03 0.204 20 12.2 7.57 87 4.42 8.8 133 182 3.8 0.11 0.02 0.47 <0.02 <0.01 0.02 0.45 21 12.9 7.38 81 5.38 10.5 129 166 3.5 0.09 0.02 0.22 0.03 <0.01 0.02 0.24 Maximum 12.9 8.41 104 16.71 33.7 229 390 25.3 0.18 0.11 0.08 3.20 0.47 0.12 0.02 0.45 1.07 16 2.6 1 20.83 Minimum 5.5 6.99 38 2.95 2.0 68 75 1.1 0.06 0.01 0.01 1.45 0.08 <0.02 <0.01 0.01 0.18 <5 1.0 <1 7.94 Average 10.2 7.37 72 6.58 7.2 122 170 5.9 0.09 0.03 0.03 2.05 0.28 0.04 0.01 0.05 0.35 9 1.4 1 15.25 #Tests 41 41 41 41 41 41 41 40 41 32 35 37 41 41 39 39 41 31 34 18 34 Site: SW-03 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek,Mid ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2021 Coliforms Fecal/ Fecal <--------------------------Blue Green Algae-------------------------------> Single Hard- Mg Na SAR Na Total E.coli Strap <------Colonies------> <-----Filaments------> <---Filamaments---> Cells D.O. SO4 ness Year mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 81 3,786 3,243 182 5 17 22 216 5 203 13 82 1,920 690 3,091 1,766 15,701 61 415 18 470 6,490 83 280 160 50 4 13 6 33 3 178 10 8.65 8.77 67 84 3.80 11.35 0.71 32.0 930 170 190 5 3 2 2 166 14 22 8.65 3.40 53 85 2.91 8.08 0.56 28.8 12,215 12,215 135 0 0 0 0 16 17 0 7.75 1.67 40 86 4.30 13.80 0.74 31.2 95 40 55 0 0 0 0 0 0 2,493 9.20 10.44 55 87 6.17 18.30 0.85 31.9 127 53 73 0 0 0 0 0 0 185 8.72 13.80 67 88 6.51 18.35 0.87 32.0 1,490 1,317 2,208 0 0 0 0 115 4 1,916 9.25 14.38 110 89 4.73 14.67 0.77 31.7 1,283 633 185 0 0 0 0 69 4 946 8.72 7.28 90 4.22 12.44 0.69 30.7 1,298 302 3,223 2 0 0 0 0 0 0 7.74 6.32 27 91 5.65 15.32 0.77 30.2 1,810 1,207 160 29 221 0 1 0 0 0 7.23 7.79 52 92 5.98 16.50 0.82 31.5 2,365 2,051 230 0 0 6 47 0 0 0 7.05 6.63 63 93 5.25 16.28 0.82 31.8 1,059 704 35 41 305 2 7 0 0 0 7.51 6.76 69 94 6.22 17.63 0.86 32.4 2,299 2,109 135 0 0 0 0 0 0 0 8.14 6.56 93 95 5.26 14.93 0.77 31.2 828 645 90 0 0 0 0 0 0 0 8.30 6.87 45 96 3.58 9.12 0.55 27.1 1,793 211 90 0 0 0 0 0 0 0 9.56 3.71 42 97 5.33 14.55 0.79 31.9 1,374 523 90 0 0 0 0 0 0 0 9.27 5.38 72 98 3.54 9.06 0.56 28.2 525 325 90 51 377 3 54 0 0 0 9.25 3.66 44 99 3.39 8.47 0.54 28.0 1,688 734 680 0 0 0 0 0 0 0 8.79 3.74 00 4.38 9.85 0.55 26.5 982 491 95 0 0 0 0 0 0 0 8.61 3.47 01 5.09 10.69 0.60 27.4 1,498 611 90 0 0 0 0 4 63 0 8.78 2.00 02 5.76 12.33 0.62 26.3 1,799 712 93 0 0 0 0 0 0 0 8.09 2.19 03 5.04 10.42 0.58 26.6 3,181 1,606 167 0 0 0 0 0 0 0 7.22 2.19 04 5.54 10.65 0.56 25.3 1,703 141 217 0 0 0 0 0 0 0 7.84 2.09 05 5.35 10.21 0.54 24.9 2,310 1,826 23 0 0 0 0 0 0 0 7.36 1.94 06 3.19 6.39 0.43 24.9 1,452 486 59 0 0 0 0 0 0 0 8.37 1.50 07 5.33 10.70 0.57 25.8 2,001 1,918 1,222 0 0 4 20 0 0 0 7.57 2.15 08 4.86 9.25 0.51 24.6 2,147 1,542 260 0 0 0 0 0 0 0 7.53 2.48 09 4.92 9.33 0.52 24.9 4,282 991 57 0 0 0 0 0 0 0 7.07 2.62 10 3.84 6.96 0.42 23.0 3,238 1,436 4 0 0 3 11 0 0 0 7.50 2.18 11 2.23 4.21 0.34 22.7 1,913 309 51 0 0 0 0 0 0 0 9.16 1.25 12 4.24 8.28 0.48 24.1 1,450 1,338 26 0 0 0 0 0 0 0 8.04 2.12 13 3.58 6.64 0.41 22.9 3,061 1,311 27 0 0 0 0 0 0 0 8.43 1.91 14 3.71 6.74 0.43 23.3 3,152 2,580 122 0 0 0 0 0 0 0 8.66 3.08 15 5.30 9.36 0.50 23.6 1,552 431 8.75 2.62 16 3.96 7.21 0.43 23.1 10,015 2,332 9.75 3.41 17 3.61 7.72 0.49 26.2 1,987 226 8.79 2.31 18 5,080 1,340 8.49 2.97 19 2,280 303 8.19 1.79 20 4,910 3,812 8.56 2.56 21 11,229 2,580 7.76 2.24 Maximum 6.51 18.35 0.87 32.4 12,215 12,215 3,223 1,766 15,701 61 415 166 470 6,490 9.75 14.38 110 Minimum 2.23 4.21 0.34 22.7 95 40 4 0 0 0 0 0 0 0 7.05 1.25 27 Average 4.61 11.05 0.61 27.6 2,644 1,357 397 56 489 3 24 12 28 355 8.32 4.31 60 #Tests 34 34 34 34 41 41 34 34 34 34 34 34 34 34 39 39 15 Site : SW-03 Nitrate-Nitrogen Total Phosphorus 0.5 0.5 0.4 0.4 0.3 0.3 J J � Ol 0.2 0.2 - A 2��_Ay- 0.1 0.1 0.0 0.0 Oy 01 O°' t Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 50 500 40 400 30 300 J J 20 £ 200 10 - AP 100 0 00 00 O^ R0 O� 0'b '0 01 00 O^ P 00 01 n0 N5 N1 n0 0 1 0 0� 00 06 01 00 0� O'S Oh 0A qI S, 00 00 O'k 00 NN ^9 Nh ^1 ^0 ry� Chlorides Linear(Chlorides) TDS Linear(TDS) Site: SW-04 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek, Lower ALPINE COUNTY SURFACEWATER QUALITY DATA 2021 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 03/03/21 2.3 7.64 41.0 5.0 10.6 70 92.0 2.98 0.035 < 0.010 < 0.10 < 0.020 < 0.010 < 0.010 04/06/21 8.6 7.47 72.3 2.4 5.11 112 143 2.65 0.047 0.010 0.203 < 0.020 < 0.010 < 0.010 05/11/21 13.3 7.41 88.7 2.2 1.89 138 168 1.88 0.093 0.035 0.622 < 0.020 < 0.010 < 0.010 06/23/21 22.4 7.68 80.8 4.1 6.14 127 161 2.74 0.132 0.046 0.509 0.034 < 0.010 < 0.010 07/06/21 19.0 7.43 100 4.0 6.92 148 203 3.01 0.125 0.041 0.520 < 0.020 < 0.010 0.016 08/04/21 20.1 7.49 122 7.9 9.10 171 251 4.32 0.215 0.074 0.582 0.024 < 0.010 < 0.010 09/09/21 16.2 7.30 98.1 6.6 6.06 137 200 3.62 0.142 0.048 0.393 0.036 < 0.010 0.027 10/06/21 10.5 7.46 81.8 3.9 6.70 114 173 3.10 0.097 0.027 0.283 < 0.020 < 0.010 < 0.010 11/04/21 10.5 7.87 31.2 15 32.8 55 72.6 1.78 0.102 0.013 0.307 < 0.020 < 0.010 < 0.010 Maximum 22.4 7.87 122.0 15.0 32.80 171 251 4.32 0.215 0.074 0.622 0.036 < 0.010 0.027 Minimum 2.3 7.30 31.2 2.2 1.89 55 72.6 1.78 0.035 < 0.010 < 0.100 < 0.020 < 0.010 < 0.010 Average 13.7 7.53 79.5 5.7 9.48 119 163 2.90 0.110 0.034 0.391 0.024 < 0.010 0.013 #Tests 9 9 9 9 9 9 9 9 9 9 0 0 9 9 9 9 Site: SW-04 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek, Lower ALPINE COUNTY SURFACEWATER QUALITY DATA 2021 Oil & Coliforms Fecal <-Blue Green Algae--> Single Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep Colonies Filaments Filamamei Cells D.O. SO4 Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L 03/03/21 < 0.10 57.3 1.0 7.40 2.70 04/06/21 0.203 687 < 1 10.39 2.23 05/11/21 0.622 1990 20.3 10.17 1.88 06/23/21 0.509 2600 155 8.44 1.30 07/06/21 0.536 7490 921 7.37 1.22 08/04/21 0.582 17900 488 6.35 1.44 09/09/21 0.420 34500 387 6.67 1.65 10/06/21 0.283 4650 649 8.52 2.61 11/04/21 0.307 1600 56.1 8.88 2.45 Maximum 0.622 34,500 921 0 0 0 0 0 0 0 10.39 2.70 Minimum < 0.100 57 < 1.0 0 0 0 0 0 0 0 6.35 1.22 Average 0.396 7,942 298 8.24 1.94 #Tests 9 0 0 0 0 0 0 0 0 9 9 0 0 0 0 0 0 0 0 9 9 Site: SW-04 SOUTH TAHOE PUBLIC UTILITY DISTRICT SW-04 Stream: Indian Creek,Lower ALPINE COUNTY SURFACEWATER QUALITY DATA Indian Cree From:1981 To: 2021 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Ca Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 81 12.4 8.02 68 2.68 5 174 260 5.2 0.08 0.05 3.69 0.46 0.04 0.56 13 1 1 82 10.1 7.51 59 4.46 11 133 194 0.09 0.06 2.37 0.39 0.02 0.58 13 1 <1 83 7.6 8.04 51 5.60 9 111 173 17.4 0.10 0.06 2.20 0.46 0.05 <0.01 0.37 0.57 12 1 <1 84 10.7 7.58 64 3.86 13 116 187 15.8 0.08 0.05 2.33 0.37 0.09 0.01 0.09 0.46 9 1 < 1 16.49 85 10.8 7.58 67 4.44 9 127 219 19.9 0.08 0.33 2.60 0.34 0.05 0.01 0.20 0.57 10 1 < 1 16.41 86 9.1 7.80 47 4.86 6 109 140 10.6 0.07 0.02 1.73 0.44 0.10 0.01 0.28 0.73 11 2 < 1 10.28 87 9.0 7.09 61 2.64 4 127 195 17.0 0.05 0.03 2.46 0.28 0.04 <0.01 0.06 0.35 8 1 < 1 14.34 88 9.1 7.43 51 4.53 10 93 122 3.8 0.07 0.02 1.72 0.29 0.04 <0.01 0.01 0.32 8 1 < 1 12.41 89 10.0 7.42 60 15.81 44.8 103 134 4.4 0.14 0.02 2.17 0.51 0.07 <0.01 0.04 0.56 15 1.3 < 1 13.40 90 8.6 7.57 58 4.10 11.3 89 122 2.6 0.09 0.04 0.03 1.73 0.21 0.02 <0.01 0.02 0.24 7 1.1 < 1 12.55 91 8.9 7.44 62 5.48 15.3 99 133 3.3 0.11 0.03 0.02 2.20 0.40 0.05 0.01 0.05 0.45 24 1.3 < 1 13.81 92 9.2 7.82 63 2.10 3.8 99 135 2.9 0.07 0.03 0.03 1.86 0.29 0.03 0.01 0.02 0.32 26 1.2 1 13.67 93 8.0 7.45 64 2.97 6.1 99 139 3.2 0.08 0.05 0.02 2.15 0.43 0.04 0.01 0.06 0.49 14 1.4 < 1 14.23 94 8.1 7.54 61 2.61 4.5 93 131 2.5 0.07 0.03 0.01 1.64 0.30 0.02 0.01 0.04 0.35 9 1.0 < 1 13.18 95 10.4 7.51 61 3.53 7.0 102 130 2.8 0.09 0.05 0.02 1.94 0.57 0.02 0.01 0.05 0.63 12 1.3 1 13.54 96 10.9 7.43 60 3.59 10.1 92 125 2.1 0.08 0.03 0.02 1.93 0.40 0.02 0.01 0.05 0.46 6 1.3 1 13.26 97 9.0 7.40 53 3.61 7.0 85 110 2.0 0.08 0.03 0.02 1.56 0.38 0.04 0.01 0.13 0.53 10 1.4 1 12.09 98 8.4 7.05 50 7.17 18.5 86 107 2.1 0.10 0.03 0.02 1.73 0.43 0.02 <0.01 0.03 0.47 6 1.3 < 1 10.62 99 9.8 7.22 52 4.49 13.1 83 108 1.7 0.08 0.03 0.01 1.78 0.31 <0.02 <0.01 0.02 0.34 6 1.2 10.44 00 9.6 7.32 52 5.76 9.4 87 108 1.8 0.07 0.02 0.02 1.58 0.32 <0.02 <0.01 0.02 0.36 <5 1.1 10.45 01 11.2 7.27 64 4.73 10.5 98 131 2.4 0.07 0.03 0.02 2.09 0.32 <0.03 <0.01 0.01 0.34 23 1.1 13.30 02 10.7 7.38 68 4.70 6.6 106 139 2.5 0.07 0.02 0.02 2.25 0.41 0.04 <0.01 <0.01 0.43 <5 1.2 14.26 03 10.5 7.76 57 5.68 10.2 90 116 2.1 0.06 0.02 0.02 1.43 0.33 0.03 <0.01 <0.01 0.36 11 1.1 11.57 04 10.7 7.19 63 6.37 6.4 99 128 2.4 0.09 0.01 0.03 2.36 0.36 0.05 <0.01 0.01 0.38 13 0.9 12.75 05 9.3 7.16 51 14.39 39.1 89 97 2.5 0.12 0.02 0.02 1.88 0.46 0.03 <0.01 0.04 0.51 19 1.7 11.15 06 9.8 7.19 45 8.23 6.6 77 74 1.6 0.06 0.02 0.02 1.43 0.21 0.03 <0.01 0.04 0.25 9 1.2 9.52 07 11.4 7.58 53 12.27 13.9 81 111 2.1 0.10 0.02 0.01 2.11 0.43 0.02 <0.01 0.02 0.46 9 2.7 11.35 08 10.0 7.71 53 6.30 5.4 88 115 3.0 0.08 0.02 0.01 2.16 0.35 <0.02 <0.01 0.14 0.50 19 1.4 11.22 09 9.8 7.43 47 12.69 17.3 81 93 2.1 0.09 0.02 0.01 1.81 0.38 0.02 <0.01 0.04 0.43 11 1.1 9.83 10 9.8 7.42 49 7.26 10.8 89 106 2.9 0.10 0.03 0.01 2.46 0.32 0.02 <0.01 0.03 0.36 7 1.6 10.39 11 10.3 7.68 44 6.11 7.9 76 91 1.7 0.06 0.02 0.01 1.58 0.19 0.02 <0.01 0.04 0.24 8 1.5 9.10 12 11.6 7.57 63 6.10 3.8 97 133 2.3 0.08 0.03 0.02 1.92 0.23 0.03 <0.01 0.01 0.25 1.4 12.50 13 11.7 7.34 55 15.26 12.2 88 111 2.0 0.10 0.02 0.01 2.08 0.33 0.03 <0.01 0.01 0.28 1.7 11.76 14 10.3 7.58 48 9.49 14.9 87 103 2.1 0.08 0.03 0.01 2.08 0.33 0.04 <0.01 0.24 0.57 1.6 10.75 15 13.9 7.87 69 3.34 3.9 106 143 2.9 0.05 0.02 0.02 1.97 0.17 0.02 <0.01 0.01 0.17 14.42 16 10.8 7.12 52 4.40 6.4 97 116 2.2 0.09 0.03 2.15 0.35 0.02 <0.01 0.12 0.47 11.59 17 13.2 7.32 52 9.90 13.2 92 107 2.1 0.11 0.02 1.99 0.38 0.03 <0.01 0.14 0.52 11.23 18 13.4 7.63 57 10.24 16.0 95 116 1.9 0.13 0.04 0.35 0.02 <0.01 0.06 0.41 19 11.6 7.64 48.4 5.53 7.15 81 103 1.81 0.088 0.022 0.291 <0.020 <0.010 0.050 0.341 20 12.3 7.81 76.7 6.21 6.65 117 152 2.49 0.110 0.027 0.593 0.023 <0.010 0.023 0.610 21 13.7 7.53 79.5 5.68 9.48 119 163 2.90 0.110 0.034 0.391 0.024 <0.010 0.013 0.396 Maximum 13.9 8.04 80 15.81 44.8 174 260 19.9 0.14 0.05 0.33 3.69 0.59 0.10 0.01 0.37 0.73 26 2.7 1 16.49 Minimum 7.6 7.05 44 2.10 3.8 76 74 1.6 0.05 0.01 0.01 1.43 0.17 <0.02 <0.01 <0.01 0.17 <5 0.9 < 1 9.10 Average 10.4 7.50 58 6.32 10.9 99 132 4.2 0.09 0.03 0.03 2.03 0.36 0.03 0.01 0.07 0.43 12 1.3 1 12.29 #Tests 41 41 41 41 41 41 41 40 41 32 35 37 41 41 39 39 41 31 34 18 34 Site: SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: k,Lower ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2021 Coliforms Fecal/ Fecal <--------------------------Blue Green Algae-------------------------------> Single Hard- Mg Na SAR Na Total E.coli Strap <------Colonies------> <-----Filaments------> <---Filamaments---> Cells D.O. SO4 ness Year mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 81 2,977 1,408 898 24 132 94 1,007 1 101 7 82 1,946 321 421 18 56 40 400 12 292 318 83 1,472 302 125 5 12 14 141 7 312 0 9.00 6.52 53 84 4.54 12.17 0.66 28.3 1,950 324 392 188 5 56 2 130 10 244 8.78 3.74 64 85 4.43 14.70 0.74 28.7 2,573 480 108 0 0 0 0 54 5 0 8.21 6.28 58 86 3.40 8.11 0.57 29.1 313 113 566 0 0 0 0 0 0 3,255 8.82 9.29 43 87 4.58 14.98 0.80 28.7 3,249 231 161 0 0 0 0 323 3 1,685 8.53 14.11 60 88 3.87 6.78 0.43 23.2 2,358 177 170 0 0 46 277 162 6 0 9.14 5.55 54 89 4.03 7.07 0.42 22.2 3,936 1,244 850 0 0 0 0 139 7 1,593 7.62 5.22 90 3.78 6.51 0.40 22.3 570 110 175 2 0 0 1 0 1 0 7.75 4.83 32 91 4.02 8.16 0.48 23.0 2,095 1,462 1,245 0 0 0 3 0 0 0 8.25 5.46 41 92 4.03 7.23 0.44 22.6 937 55 485 3 188 9 144 0 0 0 9.03 4.70 55 93 4.10 7.38 0.44 22.5 1,453 387 95 0 0 0 0 0 0 0 8.56 4.97 40 94 3.93 6.90 0.42 22.7 293 76 260 0 0 0 0 0 0 0 8.17 4.97 36 95 3.64 6.71 0.41 22.0 2,183 1,260 110 0 0 0 0 0 0 0 8.87 5.35 38 96 3.70 6.68 0.41 22.4 3,268 637 235 0 0 0 0 0 0 0 8.15 2.98 38 97 3.53 6.13 0.39 22.2 2,298 226 120 0 0 0 0 0 0 0 9.40 3.50 41 98 3.10 5.83 0.40 23.5 3,105 2,549 320 0 0 0 0 0 0 0 8.90 3.30 37 99 3.15 6.30 0.44 24.7 920 188 90 0 0 0 0 0 0 0 8.48 3.37 00 3.25 5.69 0.39 23.0 1,119 194 55 0 0 0 0 0 0 0 8.36 2.70 01 4.06 6.88 0.43 22.5 630 235 320 0 0 0 0 0 0 0 8.78 1.51 02 4.11 7.02 0.42 22.2 1,503 305 330 0 0 0 0 0 0 0 8.46 1.45 03 3.64 6.40 0.42 23.3 489 52 512 0 0 0 0 0 0 0 6.82 1.47 04 3.94 5.94 0.37 20.4 2,245 171 92 0 0 0 0 0 0 0 7.37 1.40 05 3.43 5.74 0.38 21.9 1,534 407 152 0 0 0 0 0 0 0 7.77 1.70 06 2.78 4.96 0.37 22.9 2,010 305 58 0 0 0 0 0 0 0 7.53 1.15 07 3.48 6.00 0.40 22.4 913 97 1,222 0 0 0 0 0 0 0 6.38 1.69 08 3.37 6.26 0.42 23.4 1,080 893 5,965 0 0 4 48 0 0 0 7.70 2.10 09 3.06 5.63 0.40 23.7 3,324 571 217 0 0 7 62 0 0 0 8.30 2.01 10 3.10 6.05 0.42 23.6 3,325 2,022 13 0 0 0 0 0 0 0 7.81 2.07 11 2.75 5.15 0.38 23.4 1,694 80 22 0 0 0 0 0 0 0 8.10 1.42 12 3.79 7.12 0.44 23.6 1,518 917 80 0 0 6 77 0 0 0 6.71 1.78 13 3.50 6.19 0.40 22.4 3,119 76 27 0 0 0 0 0 0 0 6.68 1.73 14 3.21 5.93 0.41 23.2 4,756 1,614 242 0 0 0 0 0 0 0 9.37 3.01 15 4.84 8.35 0.48 23.8 1,821 160 9.53 2.15 16 3.31 5.95 0.39 22.3 4,132 360 9.33 2.71 17 3.14 6.22 0.42 23.9 9,707 1,348 9.21 1.77 18 8,310 1,181 9.42 1.96 19 4,370 506 9.09 1.43 20 5,099 712 9.69 1.63 21 7,942 298 8.24 1.94 Maximum 4.84 14.98 0.80 29.1 9,707 2,549 5,965 188 188 94 1,007 323 312 3,255 9.69 14.11 64 Minimum 2.75 4.96 0.37 20.4 293 52 13 0 0 0 0 0 0 0 6.38 1.15 32 Average 3.66 7.15 0.45 23.5 2,647 587 474 7 12 8 64 24 22 209 8.37 3.46 46 #Tests 34 34 34 34 41 41 34 34 34 34 34 34 34 34 39 39 15 Site : SW-04 Nitrate-Nitrogen Total Phosphorus 0.5 0.5 0.4 0.4 0.3 0.3 J J � Ol E 0.2 E 0.2 0.1 — 0.1 s 0.0 0.0 rn rn rn o 0 o N r rn r rn r rn � r rn t Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 50 500 40 400 30 300 J J 20 £ 200 10 100 0 N N 0 _ -10 aD of of aD of rn W O m m O O O O O N Chlorides Linear(Chlorides) TDS Linear(TDS) Site: SW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Paynesville ALPINE COUNTY SURFACEWATER QUALITY DATA 2021 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Total N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 01/04/21 5.2 8.33 43.2 0.55 0.55 70 96.8 2.45 0.013 < 0.010 < 0.10 < 0.020 < 0.010 < 0.010 < 0.10 02/01/21 1.9 7.74 43.6 0.73 0.85 63 97.6 2.66 0.010 < 0.010 0.24 < 0.020 < 0.010 0.020 0.26 03/03/21 3.6 7.89 42.4 0.80 0.95 59 101 3.85 < 0.010 0.14 < 0.020 < 0.010 0.015 0.16 03/03/2912.9 7.74 81.2 0.038 04/06/21 6.3 7.72 25.2 4.2 11.4 54 61.7 2.79 0.042 < 0.010 0.299 < 0.020 < 0.010 0.022 0.321 05/11/21 9.6 7.68 24.4 2.2 4.63 46 52.3 1.26 0.025 < 0.010 0.295 < 0.020 < 0.010 < 0.010 0.295 06/23/21 14.6 7.53 36.9 0.96 2.17 62 80.1 1.60 0.036 < 0.010 0.070 < 0.020 < 0.010 < 0.010 0.070 07/06/21 18.0 8.10 40.2 1.9 5.99 61 86.2 1.63 0.038 0.012 0.183 < 0.020 < 0.010 < 0.010 0.183 08/04/21 19.1 8.26 41.3 1.7 2.79 64 92.5 1.80 0.028 0.012 0.267 < 0.020 < 0.010 < 0.010 0.267 09/09/21 17.3 8.33 50.2 0.92 1.47 78 109 2.25 0.039 0.021 0.141 < 0.020 < 0.010 < 0.010 0.141 10/06/21 11.8 8.30 45.6 1.0 1.66 72 96.9 1.80 0.033 0.011 0.056 < 0.020 < 0.010 < 0.010 0.056 11/04/21 8.8 7.89 29.8 0.99 1.67 54 72.5 1.90 0.020 < 0.010 0.158 < 0.020 < 0.010 < 0.010 0.158 12/15/21 0.79 7.94 44.1 0.82 0.47 83 111 4.19 0.024 < 0.010 0.139 < 0.020 < 0.010 0.019 0.158 Maximum 19.1 8.33 50.2 4.2 11.4 83 111 4.19 0.042 0.021 0.299 < 0.020 < 0.010 0.022 0.321 Minimum 0.8 7.53 24.4 0.55 0.47 46 52.3 1.260 0.010 < 0.010 0.056 < 0.020 < 0.010 < 0.010 0.056 Average 10.0 7.96 38.9 1.4 2.88 64 87.6 2.35 0.029 0.011 0.174 < 0.020 < 0.010 0.013 0.181 #Tests 13 13 12 12 12 12 13 12 12 12 0 0 12 12 12 12 12 Site: SW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Paynesville ALPINE COUNTY SURFACEWATER QUALITY DATA 2021 Oil& Coliforms Fecal <----------Blue Green Algae------->Single Hard- COD BOD Grease Ca Mg Na SAR Na Total E.coli Strep Colonies Filaments Filamaments Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 01/04/21 93.3 7.4 11.48 3.01 02/01/21 77.1 2.0 12.03 3.12 03/03/21 108 3.1 7.58 3.60 03/03/29 8.67 04/06/21 228 2.0 10.31 2.81 05/11/21 261 17.3 9.71 1.72 06/23/21 1200 42.6 8.83 1.99 07/06/21 4710 219 8.24 1.90 08/04/21 2420 79.4 8.21 2.74 09/09/21 14500 93.3 8.58 2.86 10/06/21 1990 49.6 9.39 2.51 11/04/21 517 12.1 9.94 2.79 12/15/21 488 8.5 11.1 5.14 Maximum 14,500 219.0 0 0 0 0 0 0 0 12.03 5.14 Minimum 77.1 2.0 0 0 0 0 0 0 0 7.58 1.720 Average 2,216 44.7 9.54 2.85 #Tests 0 0 0 0 0 0 0 0 12 12 0 0 0 0 0 0 0 0 13 12 0 Site: SW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Paynseville ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2021 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 81 9.9 7.93 36 1.15 4 64 78 1.8 0.03 0.01 1.52 0.23 0.03 0.32 6 1 < 1 82 6.4 7.61 28 2.57 23 49 57 0.04 0.02 1.11 0.19 0.01 0.29 9 1 1 83 6.0 7.73 30 2.45 8 43 60 0.9 0.03 0.03 1.17 0.19 0.05 <0.01 0.04 0.23 7 1 < 1 84 8.4 7.78 33 2.08 13 49 70 1.2 0.04 0.02 1.46 0.27 0.08 0.01 0.03 0.30 5 1 1 85 7.6 7.86 37 5.11 9 50 78 1.7 0.05 0.24 2.20 0.24 0.04 <0.01 0.04 0.28 7 1 < 1 86 6.5 7.91 32 1.92 6 53 67 1.4 0.03 0.01 1.35 0.19 0.04 <0.01 0.05 0.24 5 1 1 87 9.7 7.54 42 1.09 4 68 91 2.1 0.04 0.01 1.88 0.21 0.03 <0.01 0.06 0.28 5 1 < 1 88 9.2 7.69 42 1.10 4 80 100 3.3 0.02 0.02 1.81 0.21 0.03 <0.01 0.09 0.32 5 1 < 1 89 8.7 7.75 36 1.65 7.3 60 88 2.2 0.03 0.02 1.92 0.20 0.03 <0.01 0.06 0.27 6 1.1 < 1 90 9.4 7.77 40 1.61 4.8 73 96 2.0 0.04 0.02 0.02 1.73 0.18 0.02 <0.01 0.07 0.26 6 1.0 2 91 9.9 7.73 40 2.11 6.3 71 86 2.3 0.04 0.01 0.02 1.70 0.20 0.03 0.01 0.11 0.31 10 1.0 < 1 92 9.3 8.01 40 1.37 4.6 69 90 2.0 0.03 0.01 0.02 1.65 0.20 0.03 0.01 0.04 0.25 8 1.0 1 93 7.2 7.80 33 2.01 7.0 58 77 1.7 0.03 0.01 0.02 1.40 0.21 0.03 0.01 0.06 0.28 8 1.2 < 1 94 8.8 7.93 39 1.10 2.4 66 88 1.5 0.03 0.01 0.01 1.68 0.19 0.02 0.01 0.04 0.25 <5 1.0 < 1 95 7.1 7.69 31 1.70 10.7 54 68 1.4 0.03 0.01 0.01 1.28 0.26 0.02 0.01 0.04 0.31 7 1.0 1 96 9.1 7.57 32 1.18 5.8 59 72 1.4 0.03 0.01 0.02 1.37 0.24 0.02 0.01 0.05 0.31 2 1.2 1 97 8.1 7.49 32 6.29 19.3 59 68 1.1 0.05 0.01 0.02 1.46 0.16 0.03 0.01 0.10 0.27 5 1.0 1 98 6.8 7.27 33 1.31 5.0 56 72 1.4 0.02 0.01 0.01 1.43 0.18 0.02 <0.01 0.05 0.24 <5 0.9 < 1 99 8.1 7.37 33 1.12 3.7 59 74 1.5 0.03 0.01 0.01 1.61 0.23 <0.02 <0.01 0.04 0.28 <5 1.0 00 7.3 7.33 35 1.34 6.3 61 77 1.4 0.03 0.01 0.02 1.53 0.16 0.02 0.01 0.03 0.19 <5 1.0 01 11.4 7.49 38 1.63 3.6 62 84 1.6 0.02 0.01 0.01 1.72 0.18 0.02 <0.01 0.02 0.21 15 1.0 02 8.6 7.46 37 1.62 2.8 64 80 1.8 0.02 <0.01 0.01 1.57 0.22 0.03 <0.01 0.02 0.25 <5 0.9 03 9.0 7.68 36 4.27 10.5 61 74 1.8 0.03 0.01 0.01 1.50 0.21 0.03 0.01 0.03 0.25 6 0.9 04 8.7 7.35 36 3.97 10.4 62 76 1.8 0.03 0.01 0.02 1.56 0.19 0.03 <0.01 0.03 0.23 8 0.7 05 7.9 7.26 34 2.98 5.6 59 62 2.0 0.02 0.01 0.02 1.41 0.20 0.02 <0.01 0.03 0.24 12 1.3 06 8.0 7.25 29 3.58 6.7 53 49 1.4 0.03 0.01 0.02 1.24 0.13 0.02 <0.01 0.02 0.16 8 0.9 07 9.9 7.70 36 1.79 3.4 63 76 1.6 0.02 <0.01 0.01 1.60 0.14 0.02 <0.01 0.01 0.16 8 1.1 08 7.7 7.71 36 1.94 2.8 61 72 1.8 0.02 <0.01 0.01 1.61 0.18 <0.02 <0.01 0.01 0.20 8 1.0 09 7.5 7.55 35 2.97 5.2 58 74 1.5 0.02 <0.01 0.01 1.49 0.17 0.02 <0.01 0.01 0.20 11 0.8 10 5.9 7.51 33 3.55 5.6 59 73 1.5 0.02 0.01 < 0.01 1.52 0.10 0.02 <0.01 0.01 0.12 34 1.1 11 5.8 7.62 31 3.51 6.5 57 66 1.1 0.03 0.01 0.01 1.37 0.10 0.02 <0.01 0.02 0.13 8 1.4 12 8.2 7.46 37 1.95 3.1 61 78 1.3 0.02 0.01 0.01 1.58 0.13 0.23 <0.01 0.01 0.15 1.4 13 8.7 7.41 35 1.69 2.9 60 72 1.2 0.02 0.01 0.01 1.40 0.14 0.03 <0.01 0.02 0.15 1.0 14 7.8 7.54 39 1.29 2.0 65 83 1.5 0.02 0.01 0.01 1.62 0.13 0.03 <0.01 0.01 0.14 1.0 15 8.8 7.35 38 1.72 2.6 68 85 1.4 0.02 0.01 0.01 1.59 0.14 <0.02 <0.01 0.01 0.14 16 7.1 7.08 33 2.42 5.0 63 73 1.6 0.03 <0.01 1.42 0.16 <0.02 <0.01 0.03 0.18 17 6.8 7.25 30 2.77 6.2 55 65 1.3 0.03 0.01 1.14 0.15 0.02 <0.01 0.02 0.16 18 8.6 7.77 36 1.54 2.6 63 79 1.8 0.03 0.01 0.12 0.02 <0.01 0.02 0.13 19 7.3 8.01 34.0 2.37 3.1 57 76.2 2.2 0.024 <0.011 0.131 <0.020 <0.010 0.020 0.147 20 8.0 7.95 38.1 1.20 2.1 64 82.1 2.0 0.021 0.010 0.372 <0.020 <0.010 0.013 0.378 21 10.0 7.96 38.9 1.40 2.9 64 87.6 2.3 0.029 0.011 0.174 <0.020 <0.010 0.013 0.181 Maximum 11.4 8.01 42 6.29 23.0 80 100 3.3 0.05 0.02 0.24 2.20 0.37 0.23 0.01 0.11 0.38 34 1.4 2 Minimum 5.8 7.08 28 1.09 2.0 43 49 0.9 0.02 <0.01 0.01 1.11 0.10 0.01 <0.01 0.01 0.12 2 0.7 < 1 Average 8.2 7.61 35 2.21 6.1 60 76 1.7 0.03 0.01 0.02 1.53 0.19 0.03 0.01 0.04 0.23 8 1.0 1 #Tests 41 41 41 41 41 41 41 40 41 32 35 37 41 41 39 39 41 31 34 18 Site: SW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Paynseville ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2021 Coliforms Fecal/ Fecal <--------------------------Blue Green Algae-------------------------------> Single Hard- Ca Mg Na SAR Na Total E.coli Strap <------Colonies------> <-----Filaments------> <---Filamaments---> Cells D.O. SO4 ness Year mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 81 1,388 700 492 173 2,303 36 230 2 81 11 82 506 456 226 26 60 62 738 10 285 16 83 1,198 1,048 360 6 12 18 158 22 396 4 9.37 4.05 26 84 6.85 1.93 3.42 0.29 21.1 2,506 822 286 90 56 16 36 368 41 180 9.22 1.44 23 85 7.81 2.15 3.85 0.31 21.0 2,904 1,227 299 0 0 52 280 58 1 139 9.13 2.25 29 86 6.70 1.90 3.11 0.26 19.9 2,951 1,179 378 0 0 23 346 46 1 23 9.63 9.08 27 87 8.73 2.53 4.93 0.37 23.2 2,643 607 348 0 0 0 0 208 4 5,194 9.48 5.71 32 88 9.49 2.76 5.88 0.41 24.7 815 238 93 0 0 0 0 705 25 1,158 11.15 5.26 89 7.90 2.22 4.20 0.33 21.6 945 511 228 0 0 0 0 600 24 1,685 9.81 4.47 90 8.99 2.45 4.92 0.36 22.9 1,343 232 450 0 46 0 0 0 0 0 8.83 4.96 31 91 8.77 2.42 4.73 0.35 22.7 398 83 230 0 0 0 0 0 0 0 9.05 5.22 30 92 8.89 2.33 4.74 0.36 23.0 886 181 65 0 0 0 0 0 0 0 9.80 5.06 30 93 7.81 2.05 3.83 0.30 21.2 886 491 680 0 0 0 0 0 0 0 10.50 4.33 26 94 8.69 2.29 4.74 0.36 23.4 1,390 672 90 0 0 3 70 0 0 0 9.93 5.27 33 95 7.24 1.85 3.64 0.30 21.9 218 41 90 0 0 0 0 0 0 0 9.82 4.64 24 96 7.40 1.93 3.82 0.31 22.3 918 248 55 0 0 0 0 0 0 0 8.93 2.57 26 97 7.34 2.09 3.86 0.32 22.3 243 41 65 0 0 0 0 0 0 0 9.88 3.26 26 98 6.85 1.89 3.79 0.32 23.2 585 80 35 0 0 18 132 0 0 0 9.97 2.47 21 99 7.03 1.97 4.05 0.34 23.8 718 83 35 0 0 0 0 0 0 0 9.41 2.50 00 6.79 2.05 4.29 0.37 25.0 263 90 30 0 0 0 0 0 0 0 10.02 2.70 01 8.07 2.24 4.96 0.39 25.0 210 58 40 0 0 0 0 0 0 0 9.29 2.60 02 7.80 2.14 4.86 0.39 25.4 250 78 82 0 0 0 0 0 0 0 9.63 2.70 03 7.65 2.19 4.59 0.37 24.7 334 54 33 0 0 0 0 0 0 0 8.65 2.39 04 7.51 2.21 4.53 0.37 24.3 316 51 7 0 0 0 0 0 0 0 8.95 2.73 05 7.45 2.07 4.26 0.35 23.8 72 29 51 4 266 35 216 0 0 0 10.13 2.56 06 6.51 1.80 3.39 0.30 21.6 259 77 23 0 0 0 0 0 0 0 9.86 1.60 07 7.90 2.20 4.87 0.39 25.1 202 63 33 0 0 0 0 0 0 0 9.33 2.42 08 7.98 2.16 4.79 0.38 24.9 512 98 162 0 0 0 0 4 821 0 9.84 2.86 09 7.70 2.01 4.45 0.36 24.5 333 106 48 0 0 0 0 0 0 0 9.90 2.54 10 7.44 2.06 4.14 0.34 23.3 983 949 68 0 0 0 0 0 0 0 9.37 2.49 11 6.71 1.82 3.58 0.31 22.7 389 143 9 0 0 3 54 0 0 0 10.50 1.64 12 7.81 2.06 4.34 0.35 23.6 321 74 4 0 0 0 0 0 0 0 9.14 2.28 13 7.93 2.00 4.29 0.35 23.5 740 62 7 0 0 0 0 0 0 0 9.71 2.30 14 8.41 2.20 4.95 0.39 25.0 1,545 108 6 0 0 0 0 0 0 0 9.62 2.63 15 8.85 2.27 4.93 0.38 24.1 1,087 104 10.46 2.75 16 7.81 2.03 4.32 0.35 23.8 1,167 59 11.46 2.39 17 6.92 1.80 3.49 0.30 22.2 581 37 10.45 1.49 18 20,967 20,255 10.45 1.99 19 760 22 10.54 2.02 20 797 68 10.76 2.13 21 2,216 45 9.54 2.85 Maximum 9.49 2.76 5.88 0.41 25.4 20,967 20,255 680 173 2,303 62 738 705 821 5,194 11.46 9.08 33 Minimum 6.51 1.80 3.11 0.26 19.9 72 22 4 0 0 0 0 0 0 0 8.65 1.44 21 Average 7.76 2.12 4.31 0.35 23.3 1,408 770 150 9 81 8 66 59 49 247 9.78 3.19 27 #Tests 34 34 34 34 34 41 41 34 34 34 34 34 34 34 34 39 39 14 Site : SW-05 Nitrate-Nitrogen Total Phosphorus 0.5 0.5 0.4 0.4 0.3 0.3 J J 0.2 0.2 0.1 A 0.1 0.0 i 0.0 O^ OA Oy O� Oq O^ Ob 00 01 0' Is, 00 Oy 01 Oq ^^ ^�' ^5 ^A ^9 ry^ O^ 0A 0y 01 19, O^ 00 Ob 01 0' Is, OA O� OA Oq t Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 10 — 250 9 8 200 7 6 150 J J rn 5 a1 £ 4 £ 100 3 2 50 1 0 8182 83 84 85 86 87 88 89 90 9192 93 94 95 96 97 98 99 00 0102 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 0 0^ 0`� Oh 01 bq A^ 9�' Oh 9, 90 O^ pry O`'� Ory 00 ^^ ^°' ^h ^\ ^O ry^ Chlorides Linear(Chlorides) TDS Linear(TDS) Site: SW-06 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River, Stateline ALPINE COUNTY SURFACEWATER QUALITY DATA 2021 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 01/04/21 6.2 8.37 45.4 0.57 1.25 71 103 3.00 0.012 < 0.010 < 0.10 < 0.020 < 0.010 0.079 02/01/21 4.3 7.57 45.2 0.44 0.33 70 93.6 3.12 < 0.010 < 0.010 0.15 < 0.020 < 0.010 0.106 03/03/21 4.1 8.08 44.8 1.0 2.58 63 107 4.29 < 0.010 < 0.10 < 0.020 < 0.010 0.074 03/29/21 13.0 7.91 92.1 0.028 04/06/21 7.4 7.71 26.8 4.9 11.4 57 64.6 2.85 0.044 < 0.010 0.328 < 0.020 < 0.010 0.026 05/11/21 10.5 7.35 26.6 2.0 4.63 52 56.7 1.52 0.028 0.012 0.214 < 0.020 < 0.010 0.024 06/23/21 15.6 8.02 39.4 1.0 2.72 63 83.5 1.72 0.065 < 0.010 0.134 < 0.020 < 0.010 0.024 07/06/21 19.4 8.03 41.7 1.5 6.17 46 86.9 1.89 0.036 0.013 0.188 < 0.020 < 0.010 0.025 08/04/21 21.3 8.26 42.6 1.9 3.14 63 93.7 1.98 0.030 0.010 0.170 < 0.020 < 0.010 0.012 09/09/21 18.5 8.27 51.8 1.2 2.46 81 115 2.75 0.028 0.013 0.157 < 0.020 < 0.010 0.055 10/06/21 12.8 8.08 46.4 0.97 1.32 72 99.6 2.07 0.022 0.014 0.062 < 0.020 < 0.010 0.031 11/04/21 9.0 7.96 30.6 1.2 2.40 58 75.5 2.07 0.024 < 0.010 0.230 < 0.020 < 0.010 0.014 12/15/21 0.78 8.09 47.0 1.1 2.70 90 120 4.98 0.026 < 0.010 0.176 < 0.020 < 0.010 0.094 Maximum 21.3 8.37 51.8 4.9 11.4 90 120 4.98 0.065 0.014 0.328 < 0.020 < 0.010 0.106 Minimum 0.8 7.35 26.6 0.44 0.33 46 56.7 1.520 < 0.010 < 0.010 0.062 < 0.020 < 0.010 0.012 Average 11.0 7.98 40.7 1.5 3.43 66 91.6 2.69 0.029 0.011 0.167 < 0.020 < 0.010 0.047 #Tests 13 13 12 12 12 12 13 12 12 12 0 0 12 12 12 12 Site: SW-06 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River, Stateline ALPINE COUNTY SURFACEWATER QUALITY DATA 2021 Oil & Coliforms Fecal <-Blue Green Algae-> Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep Colonies Filamer Filama Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um#cells mg/L mg/L mg/L 01/04/21 < 0.10 172 5.2 11.62 3.43 02/01/21 0.26 102 2 10.85 3.57 03/03/21 < 0.10 147 6.3 7.69 4.05 03/29/21 9.30 04/06/21 0.354 236 9.6 10.34 2.76 05/11/21 0.238 816 21.3 9.63 2.00 06/23/21 0.158 2100 308 8.64 2.06 07/06/21 0.213 13000 248 7.76 2.10 08/04/21 0.182 2420 105 8.24 2.60 09/09/21 0.212 24600 145 9.03 3.22 10/06/21 0.093 > 2420 326 9.77 2.71 11/04/21 0.244 866 35.9 9.83 2.92 12/15/21 0.270 727 9.8 11.60 5.90 Maximum 0.354 24,600 326 0 0 0 0 0 0 0 11.62 5.90 Minimum 0.093 102.0 2.0 0 0 0 0 0 0 0 7.69 2.00 Average 0.202 3,967 102 9.56 3.11 #Tests 12 0 0 0 0 0 0 0 0 12 12 0 0 0 0 0 0 0 0 13 12 0 Site: SW-06 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Stateline ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2021 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 81 10.7 7.75 38 1.00 3 69 83 1.8 0.02 0.01 1.72 0.22 0.04 0.30 6 1 < 1 82 83 8.9 7.70 32 3.43 11 55 63 1.1 0.04 0.03 1.46 0.18 0.02 <0.01 0.02 0.21 7 1 < 1 84 10.1 7.72 38 2.42 10 56 82 2.2 0.04 0.02 1.59 0.27 0.07 <0.01 0.02 0.29 6 1 < 1 85 9.5 7.84 42 1.88 4 63 99 4.0 0.03 0.30 1.85 0.21 0.04 <0.01 0.02 0.24 7 1 < 1 86 7.2 7.90 35 1.98 7 58 76 2.3 0.03 0.01 1.47 0.20 0.04 <0.01 0.03 0.23 6 1 < 1 87 10.6 7.36 48 1.38 4 79 110 4.3 0.03 0.02 2.19 0.21 0.03 <0.01 0.02 0.24 5 1 < 1 88 10.7 7.59 48 3.46 9 90 125 6.1 0.04 0.02 2.10 0.28 0.04 <0.01 0.02 0.31 7 1 1 89 9.8 7.69 42 1.72 6.5 77 109 5.0 0.03 0.02 1.75 0.21 0.03 <0.01 0.06 0.27 6 1.2 < 1 90 9.6 7.82 47 1.86 3.0 88 118 4.9 0.03 0.02 0.02 2.06 0.18 0.02 <0.01 0.04 0.23 5 1.1 < 1 91 9.4 7.62 45 1.82 5.2 78 107 4.4 0.05 0.01 0.02 1.95 0.21 0.03 0.01 0.03 0.25 9 1.1 1 92 10.1 7.81 45 1.83 3.8 79 113 4.2 0.03 0.01 0.02 1.88 0.23 0.03 0.01 0.02 0.25 8 1.2 1 93 7.8 7.72 35 2.13 8.3 63 82 2.2 0.03 0.01 0.02 1.54 0.22 0.02 0.01 0.04 0.28 14 1.3 < 1 94 9.9 7.85 42 0.91 2.3 72 98 2.4 0.03 0.01 0.02 1.80 0.22 0.02 0.01 0.02 0.25 6 1.1 < 1 95 8.0 7.62 32 1.86 11.7 61 75 2.0 0.04 0.01 0.01 1.34 0.29 0.02 0.01 0.07 0.37 8 1.2 1 96 9.7 7.51 35 1.69 5.4 63 80 2.1 0.03 0.01 0.02 1.46 0.25 0.02 0.01 0.05 0.31 3 1.1 1 97 9.1 7.53 34 2.53 8.2 62 76 1.7 0.04 0.01 0.02 1.73 0.20 0.03 0.01 0.15 0.36 5 1.2 1 98 8.9 7.31 35 1.64 5.6 61 78 2.0 0.03 0.01 0.01 1.49 0.20 0.02 <0.01 0.05 0.26 <5 1.0 < 1 99 10.5 7.33 33 1.09 6.7 60 78 1.6 0.03 <0.01 0.02 1.59 0.21 0.02 <0.01 0.03 0.24 <5 0.9 00 10.0 7.30 36 1.69 6.9 66 82 2.2 0.03 <0.01 0.02 1.61 0.19 0.02 <0.01 0.03 0.23 <5 1.0 01 12.4 7.46 38 1.96 4.0 65 92 2.2 0.02 0.01 0.01 1.74 0.20 0.02 <0.01 0.02 0.24 13 0.9 02 11.0 7.66 36 1.84 3.9 64 81 2.2 0.03 <0.01 0.02 1.59 0.24 0.04 <0.01 0.02 0.27 <5 1.0 03 9.7 7.61 37 3.29 6.6 67 84 2.5 0.03 0.01 0.02 1.65 0.23 0.03 <0.01 0.05 0.28 6 0.9 04 10.5 7.52 37 4.30 9.6 65 81 2.3 0.03 <0.01 0.02 1.56 0.21 0.03 <0.01 0.03 0.24 10 0.7 05 9.3 7.37 34 2.98 5.8 61 69 2.6 0.02 <0.01 0.02 1.47 0.24 0.02 <0.01 0.06 0.30 9 1.3 06 9.2 7.11 30 3.61 8.5 54 49 1.5 0.03 <0.01 0.02 1.27 0.10 0.03 <0.01 0.03 0.14 17 1.0 07 11.7 7.73 33 2.03 3.9 63 83 2.1 0.02 <0.01 0.01 1.77 0.15 0.02 <0.01 0.05 0.21 7 1.0 08 11.5 7.94 38 1.56 2.4 63 86 2.8 0.03 <0.01 0.01 1.86 0.21 0.02 <0.01 0.06 0.28 6 1.0 09 9.5 7.73 36 2.71 5.8 65 80 2.1 0.02 <0.01 0.01 1.63 0.20 0.02 <0.01 0.05 0.26 11 0.9 10 8.1 7.60 32 3.16 5.9 57 72 1.6 0.03 0.01 0.01 1.62 0.13 <0.02 <0.01 0.02 0.16 12 1.2 11 8.3 7.73 31 3.97 9.1 56 68 1.3 0.04 0.01 0.01 1.60 0.14 0.02 <0.01 0.03 0.19 7 1.3 12 11.0 7.29 40 1.66 3.1 62 81 1.5 0.02 0.01 0.01 1.67 0.18 0.03 <0.01 0.02 0.21 1.3 13 11.2 7.51 36 2.15 4.0 62 74 1.4 0.03 0.01 0.01 1.45 0.19 0.02 <0.01 0.02 0.20 0.9 14 9.7 7.57 39 1.18 2.2 67 89 2.0 0.02 0.01 0.01 1.84 0.13 0.03 <0.01 0.03 0.15 1.0 15 9.1 7.36 40 2.06 5.2 69 88 1.9 0.02 <0.01 0.02 1.66 0.15 0.02 <0.01 0.04 0.19 16 7.8 7.21 34 2.37 5.2 66 76 1.9 0.03 <0.01 1.47 0.17 <0.02 <0.01 0.04 0.21 17 7.1 7.29 31 3.11 8.1 56 67 1.4 0.03 <0.01 1.19 0.15 0.02 <0.01 0.04 0.18 18 9.2 7.86 38 1.58 3.0 67 86 2.7 0.03 0.01 0.15 0.02 <0.01 0.04 0.19 19 8.1 7.96 36 2.18 3.2 60 82 2.6 0.03 <0.01 0.14 <0.02 <0.01 0.05 0.19 20 8.9 8.02 40 1.24 2.7 67 89 2.4 0.02 0.01 0.31 <0.02 <0.01 0.06 0.34 21 11.0 7.98 41 1.48 3.4 66 92 2.7 0.03 0.01 0.17 <0.02 <0.01 0.05 0.20 Maximum 12.4 8.02 48 4.30 11.7 90 125 6.1 0.05 0.02 0.30 2.19 0.31 0.07 0.01 0.15 0.37 17 1.3 1 Minimum 7.1 7.11 30 0.91 2.2 54 49 1.1 0.02 <0.01 0.01 1.19 0.10 <0.02 <0.01 0.02 0.14 3 0.7 <1 Average 9.6 7.61 37 2.17 5.7 66 85 2.5 0.03 0.01 0.02 1.66 0.20 0.03 0.01 0.04 0.24 7 1.1 1 #Tests 40 40 40 40 40 40 40 40 40 32 34 36 40 40 39 39 40 30 33 17 Site: SW-06 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Stateline ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2021 Coliforms Fecal/ Fecal <--------------------------Blue Green Algae-------------------------------> Single Hard- Ca Mg Na SAR Na Total E.coli Strap <------Colonies------> <-----Filaments------> <---Filamaments---> Cells D.O. SO4 ness Year mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 81 1,843 1,191 488 50 403 42 312 2 63 6 82 83 4,216 1,060 843 0 0 20 310 0 0 0 9.67 0.69 26 84 8.06 2.37 3.69 0.29 19.9 4,137 1,724 306 53 9 14 8 783 312 13 8.81 1.85 32 85 9.81 2.83 4.91 0.35 21.3 879 754 83 0 0 7 1 27 2 0 9.34 2.09 36 86 7.60 2.28 3.54 0.28 19.5 2,082 522 318 0 0 2 98 139 5 4,178 9.54 9.08 30 87 10.29 3.43 5.58 0.38 22.3 1,009 639 251 0 0 46 577 115 4 1,339 9.37 6.64 35 88 11.73 3.73 6.26 0.40 22.2 666 288 176 0 0 0 0 369 13 554 10.78 6.01 89 10.19 3.09 5.18 0.35 21.3 669 465 286 0 0 0 0 392 167 11,149 10.69 5.34 90 10.95 3.36 5.41 0.36 21.2 1,074 178 318 0 0 0 0 0 0 222 8.43 5.71 46 91 10.65 4.74 5.30 0.34 19.6 774 181 65 0 0 0 0 0 0 0 8.75 5.60 41 92 10.53 2.99 5.02 0.34 20.9 516 101 60 0 0 0 0 0 0 0 9.26 5.60 30 93 8.11 2.21 4.06 0.32 21.4 2,450 1,088 60 0 0 0 0 0 0 0 9.93 4.49 27 94 9.48 2.58 5.12 0.37 23.2 3,094 315 540 0 0 0 0 0 0 0 9.43 5.65 34 95 7.75 2.03 3.93 0.31 22.0 580 59 50 0 0 0 0 0 0 0 9.65 4.84 25 96 7.98 2.21 4.03 0.32 21.8 799 205 55 0 0 0 0 0 0 0 8.80 3.19 28 97 8.03 2.54 4.14 0.32 21.5 323 88 230 0 0 0 0 0 0 0 9.65 3.16 29 98 7.50 2.06 4.01 0.33 22.7 333 63 130 0 0 13 72 0 0 0 8.65 2.60 25 99 7.12 2.04 4.10 0.34 23.7 1,799 109 130 0 0 0 0 0 0 0 9.28 2.74 00 7.35 2.33 4.34 0.35 23.6 1,503 119 60 0 0 0 0 0 0 0 9.33 3.05 01 8.33 2.39 4.76 0.37 23.8 681 137 130 0 0 0 0 0 0 0 9.47 2.68 02 7.75 2.27 4.59 0.37 24.3 509 135 58 0 0 0 0 0 0 0 8.85 2.66 03 8.00 2.43 4.59 0.36 23.5 275 72 68 0 0 0 0 0 0 0 8.58 2.69 04 7.59 2.35 4.36 0.35 23.3 794 81 42 0 0 0 0 0 0 0 8.76 2.74 05 7.66 2.22 4.24 0.34 23.1 167 53 26 0 0 0 0 0 0 0 9.14 2.63 06 6.54 1.84 3.46 0.30 22.6 832 87 29 0 0 0 0 0 0 0 9.58 1.67 07 8.26 2.37 4.85 0.38 24.1 485 210 43 0 0 0 0 0 0 0 8.70 2.62 08 8.42 2.37 4.88 0.38 24.1 267 142 230 0 0 0 0 0 0 0 9.13 3.33 09 8.17 2.31 4.57 0.36 23.5 446 61 26 0 0 0 0 0 0 0 9.30 2.68 10 7.23 2.06 3.91 0.33 22.7 1,305 181 77 0 0 0 0 0 0 0 8.86 2.30 11 6.77 1.96 3.52 0.30 21.7 2,718 1,676 77 0 0 0 0 0 0 0 9.66 1.54 12 8.02 2.12 4.57 0.37 23.9 737 107 12 0 0 0 0 0 0 0 8.49 2.21 13 8.26 2.16 4.38 0.35 23.1 2,391 193 14 0 0 0 0 0 0 0 8.97 2.29 14 8.78 2.37 5.05 0.39 24.4 1,633 206 13 0 0 0 0 0 0 0 9.23 2.84 15 9.15 2.46 5.18 0.39 24.1 1,867 61 10.59 3.01 16 7.98 2.08 4.44 0.36 23.8 1,278 63 11.34 2.61 17 7.13 1.88 3.64 0.31 22.3 437 52 10.57 1.62 18 1,449 104 10.52 2.19 19 1,010 41 10.59 2.31 20 2,043 48 11.04 2.47 21 3,967 102 9.56 3.11 Maximum 11.73 4.74 6.26 0.40 24.4 4,216 1,724 843 53 403 46 577 783 312 11,149 11.34 9.08 46 Minimum 6.54 1.84 3.46 0.28 19.5 167 41 12 0 0 0 0 0 0 0 8.43 0.69 25 Average 8.45 2.48 4.52 0.35 22.5 1,351 324 160 3 12 4 42 55 17 529 9.49 3.35 32 #Tests 34 34 34 34 34 40 40 33 33 33 33 33 33 33 33 39 39 14 Site : SW-06 Nitrate-Nitrogen Total Phosphorus 0.5 0.5 0.4 0.4 0.3 0.3 J J � Ol E E 0.2 0.2 0.1 0.1 0.0 0.0 O, OA Oh 01 00 O� Ob 00 01 0' Is, 00 Oy 01 Ol �N �A �h '�� O �.� q�, 0A Oy 01 19, O� 00 O1, 01 0' Is, OA 00 01 00 Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 10 250 9 8 200 7 6 150 J J rn 5 a� £ 4 £ 100 3 2 50 1 0 8182 83 84 85 86 87 88 89 90 9192 93 94 95 96 97 98 99 00 0102 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 0 01 0q A O, Oh 91 qI O, 00 O`'� 01 00 ^N N3 Nh N\ Nq Chlorides Linear(Chlorides) TDS Linear(TDS) Site: SW-07 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredricksburg Ditch, Upper ALPINE COUNTY SURFACEWATER QUALITY DATA 2021 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 03/03/21 Dry 04/06/21 Dry 05/11/21 Dry 06/23/21 Dry 07/06/21 Dry 08/04/21 Dry 09/09/21 Dry 10/06/21 Dry 11/04/21 Dry Maximum Minimum < < Average #Tests 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Site: SW-07 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredricksburg Ditch, Upper ALPINE COUNTY SURFACEWATER QUALITY DATA 2021 Oil & Coliforms Fecal <--------------------------Blue (Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep <------Cc<-----Fila<---Filam Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 03/03/21 04/06/21 05/11/21 06/23/21 07/06/21 08/04/21 09/09/21 10/06/21 11/04/21 Maximum 0 0 0 0 0 0 0 Minimum > 0 0 0 0 0 0 0 Average #Tests 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Site: SW-07 SOUTH TAHOE PUBLIC UTILITY DISTRICT SW-07 Stream: Fredricksburg Ditch,Upper ALPINE COUNTY SURFACEWATER QUALITY DATA Fredricksl From: 1981 To: 2021 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Ca Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 81 13.1 7.50 69 1.60 1 175 250 0.05 0.03 3.20 0.39 0.05 0.61 7 1 < 1 82 11.8 7.54 73 6.78 26 139 182 24.5 0.13 0.09 4.90 0.80 0.03 1.03 28 1 < 1 83 18.0 7.63 68 2.35 5 128 165 10.2 0.07 0.05 4.44 0.69 0.09 <0.01 0.09 0.80 23 2 < 1 84 15.0 7.63 59 4.30 11 95 155 9.7 0.11 0.05 3.33 0.44 0.09 0.01 0.24 0.69 12 1 < 1 15.33 85 16.0 7.51 60 2.60 5 113 174 11.6 0.09 0.03 3.70 0.59 0.10 0.01 0.04 0.64 17 1 < 1 14.47 86 12.5 7.79 70 5.07 4 125 171 8.4 0.09 0.02 4.10 0.51 0.07 0.01 0.16 0.68 17 1 < 1 15.67 87 16.3 7.61 86 5.75 19 176 267 20.8 0.20 <0.01 6.75 1.32 0.20 <0.01 0.22 1.55 36 5 < 1 24.00 88 13.1 7.31 70 4.32 8 158 232 19.9 0.07 0.02 5.32 0.78 0.08 0.01 0.12 0.91 15 2 1 22.50 89 17.6 7.39 72 12.08 26.0 166 257 27.9 0.21 0.03 5.22 0.94 0.08 <0.01 0.14 1.09 16 2.0 < 1 23.40 90 9.6 7.46 68 3.13 6.0 158 292 34.5 0.06 0.02 0.03 3.42 0.24 0.03 <0.01 0.31 0.56 6 1.2 < 1 26.00 91 14.3 7.22 69 2.96 12.6 198 262 42.2 0.17 0.06 0.04 4.48 0.64 0.09 0.04 0.63 1.31 21 2.2 < 1 27.60 92 11.9 7.40 82 2.63 6.0 244 344 48.1 0.25 0.15 0.05 7.73 1.26 0.03 0.02 0.28 1.56 3 3.3 < 1 28.67 93 14.0 7.12 72 4.20 7.4 166 243 26.3 0.21 0.13 0.03 5.32 0.84 0.03 0.02 0.44 1.30 18 1.8 2 23.00 94 10.8 7.87 80 2.30 19.0 240 313 33.4 0.12 0.03 0.02 3.63 0.95 0.03 0.01 0.44 1.39 10 4.0 < 1 23.00 95 18.3 6.90 63 3.37 4.7 122 147 5.9 0.17 0.10 0.03 4.70 1.00 0.04 0.01 0.06 1.06 2.0 1 16.67 96 21.2 7.03 76 5.20 5.5 140 199 11.6 0.19 0.10 0.03 4.80 1.01 0.04 0.02 0.27 1.29 2.0 1 18.00 97 19.6 7.44 64 7.00 54.0 129 155 7.2 0.24 0.08 0.04 3.70 1.16 0.05 0.01 0.07 1.24 34 4.5 1 16.00 98 17.0 7.04 60 3.40 6.4 114 144 5.9 0.13 0.07 0.03 3.55 0.73 0.03 0.01 0.13 0.87 1.7 < 1 12.50 99 20.0 7.15 87 2.50 3.8 159 208 7.6 0.12 0.08 0.03 4.51 0.67 0.03 <0.01 0.41 1.10 1.1 19.95 00 15.7 7.11 64 24.23 40.5 143 193 14.3 0.46 0.21 0.07 6.83 1.65 0.32 0.05 0.63 2.33 3.4 13.36 01 16.6 7.21 72 7.48 5.2 146 223 18.1 0.24 0.22 0.04 5.30 1.43 0.04 0.09 0.78 2.30 1.0 16.30 02 14.9 7.43 82 5.52 4.0 148 212 14.9 0.14 0.05 0.04 4.60 0.63 0.04 <0.01 0.34 0.97 1.1 19.17 03 14.5 7.54 67 7.69 11.7 143 194 14.4 0.23 0.13 0.05 4.33 0.84 0.18 0.04 0.52 1.40 27 2.1 15.36 04 14.0 7.41 48 12.75 26.0 133 183 13.6 0.08 0.06 0.03 5.03 0.77 0.19 0.01 0.38 1.15 25 2.0 10.49 05 14.7 6.87 65 7.28 8.7 149 184 17.4 0.31 0.22 0.05 4.62 1.11 0.44 0.07 0.50 1.68 34 2.6 13.55 06 16.3 7.18 68 4.45 5.3 115 131 5.9 0.15 0.05 0.04 3.04 0.75 0.13 0.01 0.14 0.90 1.5 15.05 07 15.3 7.53 77 4.92 8.6 149 212 16.1 0.14 0.07 0.04 4.80 0.55 0.25 0.03 0.93 1.51 24 1.7 16.48 08 7.9 7.51 50 43.00 71.3 114 140 7.3 0.40 0.14 0.02 8.66 1.32 0.08 0.01 0.10 1.43 8.9 11.70 09 14.1 7.68 89 20.73 32.5 167 229 15.6 0.16 0.02 0.03 5.82 0.83 0.03 <0.01 0.23 1.07 2.6 19.47 10 11.8 7.38 75 82.48 75.3 147 211 14.9 0.37 0.03 0.03 5.54 0.72 0.03 <0.01 0.63 1.36 1.9 16.90 11 12.4 7.52 62 49.62 85.3 114 148 6.8 0.44 0.06 0.03 5.81 1.23 0.07 0.02 0.17 1.42 21 2.7 12.63 12 20.6 7.11 70 9.50 13.7 153 257 16.5 0.27 0.14 0.04 5.56 3.25 2.10 0.02 1.07 4.34 5.0 16.87 13 14.6 7.12 74 7.50 5.9 148 197 12.4 0.22 0.04 0.03 4.75 1.05 0.05 0.02 0.47 1.52 2.9 16.70 14 8.8 7.13 81 5.13 5.6 170 247 19.2 0.13 0.04 0.04 6.13 0.60 0.05 <0.01 0.97 1.57 1.7 19.07 15 13.7 7.24 106 2.80 3.1 170 274 23.5 0.09 0.05 0.05 3.93 0.40 0.02 <0.02 1.28 1.68 20.85 16 Dry 17 14.5 7.19 65 2.50 2.5 120 153 5.4 0.13 0.05 5.26 0.65 0.03 <0.01 0.07 0.72 14.97 18 15.5 7.55 62 2.80 1.9 106 128 1.8 0.13 0.04 0.53 <0.01 0.03 0.56 19 19.5 7.12 51 8.2 12.4 68 128 5.7 0.23 0.10 0.92 0.33 0.03 0.18 1.13 20 11.5 7.01 67 4.7 6.4 145 212 17.5 0.55 0.45 3.25 1.77 0.17 0.78 4.20 21 Dry Maximum 21.2 7.87 106 82.48 85.3 244 344 48.1 0.55 0.45 0.09 8.66 3.25 2.10 0.17 1.28 4.34 36 8.9 2 28.67 Minimum 7.9 6.87 48 1.60 1.0 68 128 1.8 0.05 0.02 <0.01 3.04 0.24 0.02 <0.01 0.03 0.56 3 1.0 < 1 10.49 Average 14.8 7.34 70 10.12 16.8 146 205 16.2 0.19 0.10 0.04 4.91 0.96 0.19 0.02 0.39 1.36 20 2.4 1 18.05 #Tests 39 39 39 39 39 39 39 38 39 30 35 36 39 38 37 37 39 20 34 18 33 Site: SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: )urg Ditch,Upper ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2021 Coliforms Fecal/ Fecal <--------------------------Blue Green Algae-------------------------------> Single Hard- Mg Na SAR Na Total E.coli Strep <------Colonies------> <-----Filaments------> <---Filamaments---> Cells D.O. SO4 ness Year mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 81 1,120 763 216 56 193 13 90 3 46 10 82 5,380 1,608 3,306 126 930 104 1,122 4 84 92 83 6,700 5,965 2,515 5 10 65 780 35 920 20 7.75 2.16 61 84 3.20 8.93 0.52 24.2 1,500 958 1,355 2 1 5 2 142 7 72 8.63 12.43 53 85 3.48 10.73 0.62 26.9 9,110 1,343 843 0 0 0 0 277 2 0 7.70 3.31 50 86 3.89 9.33 0.57 25.4 17,533 3,133 710 0 0 0 0 0 0 369 7.63 < 10.00 60 87 5.85 17.50 0.85 28.2 >24,000 17,500 5,545 0 0 0 0 0 0 277 7.05 13.43 86 88 6.03 12.50 0.60 23.6 7,966 3,872 998 0 0 0 0 0 0 277 10.81 13.23 89 6.05 15.80 0.72 26.3 10,688 9,065 8,498 0 0 0 0 0 0 1,708 8.93 15.53 90 6.78 14.36 0.64 24.5 1,646 510 183 0 0 0 0 0 0 0 8.80 17.88 78 91 6.82 19.64 0.85 28.3 12,366 7,696 430 0 0 21 648 0 0 0 7.47 18.75 48 92 7.40 26.67 1.17 33.7 11,810 9,677 90 0 0 0 0 0 0 0 7.90 25.01 122 93 5.78 16.76 0.80 29.0 13,640 6,136 230 0 0 0 0 0 0 0 7.64 13.46 64 94 5.67 13.10 0.64 26.5 4,053 630 260 0 0 0 0 0 0 0 10.90 17.63 99 95 4.00 7.80 0.44 20.9 12,167 9,677 0 0 0 0 0 0 0 6.72 6.97 96 4.20 12.50 0.69 28.3 24,000 17,500 0 0 0 0 0 0 0 7.95 8.27 97 4.15 10.25 0.59 26.5 17,500 5,515 4,600 0 0 0 0 0 0 0 8.08 7.31 53 98 3.24 10.70 0.70 32.2 4,600 2,400 0 0 0 0 0 0 0 9.00 4.00 99 4.23 14.30 0.79 30.7 7,800 3,050 0 0 0 0 0 0 0 5.35 5.96 00 4.66 17.17 1.03 37.3 11,067 10,333 0 0 0 0 0 0 0 7.40 8.25 01 4.23 19.75 1.13 39.1 5,620 5,620 0 0 0 0 0 0 0 8.85 7.14 02 4.95 17.50 0.92 33.7 1,187 540 0 0 0 0 0 0 0 8.69 7.04 03 4.23 13.77 0.79 32.4 4,875 2,783 240 0 0 9 528 0 0 0 7.33 5.08 04 3.45 9.01 0.62 29.5 7,800 5,620 240 0 0 0 0 0 0 0 7.58 7.13 05 3.74 15.52 0.94 34.7 2,538 2,040 230 0 0 0 0 0 0 0 7.90 5.42 06 3.50 9.01 0.54 26.1 965 680 0 0 0 0 0 0 0 8.57 2.12 07 4.72 19.37 1.08 37.5 3,578 790 93 0 0 0 0 0 0 0 7.94 6.32 08 4.18 10.70 0.68 28.8 2,400 2,400 0 0 0 0 0 0 0 7.08 4.93 09 5.90 17.73 0.90 32.3 7,643 3,820 0 0 0 0 0 0 0 9.86 7.30 10 6.13 14.69 0.78 29.4 4,325 3,958 0 0 7 83 0 0 0 7.68 6.87 11 4.71 10.73 0.66 29.1 5,666 5,524 43 0 0 0 0 0 0 0 8.45 2.32 12 4.87 19.77 1.10 38.4 11,000 7,643 0 0 9 297 0 0 0 7.43 24.37 13 4.29 15.28 0.86 33.4 4,733 3,690 90 0 0 0 0 0 0 0 7.90 8.43 14 5.18 20.87 1.09 36.9 7,477 4,443 0 0 0 0 0 0 0 7.23 9.46 15 5.46 23.75 1.20 39.4 2,755 317 7.81 10.55 16 17 3.66 9.34 0.55 24.9 8,041 304 9.08 1.98 18 2,682 387 7.96 1.81 19 5,630 743 7.35 2.62 20 21,060 6,750 9.55 7.03 21 Maximum 7.40 26.67 1.20 39.4 >24,000 17,500 8,498 126 930 104 1,122 277 920 1,708 10.90 25.01 122 Minimum 3.20 7.80 0.44 20.9 965 304 43 0 0 0 0 0 0 0 5.35 1.81 48 Average 4.81 14.69 0.79 30.2 8,067 4,497 1,463 6 33 7 104 14 31 83 8.11 8.96 70 #Tests 33 33 33 33 39 39 21 34 34 34 34 34 34 34 37 37 11 Site : SW-07 Nitrate-Nitrogen Total Phosphorus 1.5 1.0 1.4 0.9 1.3 1.2 0.8 1.1 0.7 1.0 0.9 0.6 00:7 £ 0.5 0.6 0.4 0.5 0.3 0.4 0.3 0.2 0.2 0.1 0.1 0.0 0.0 KI NN NA 411 K1 'q 0^ OA 05 ObA %II O^ 0, 9y 01 0°' Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 100 500 90 80 400 70 60 300 J J rn 50 rn £ 40 £ 200 30 20 100 10 0 0 a'` Ip 41 eA m9 e^ e3 0 eb Is, 13, oh oA o° N� N, Nh N1 NI9 a'` Ip 41 %A m9 e^ e3 O0 eb Is, Ip oh oA 09 N' Nb �h N1 �a Chlorides Linear(Chlorides) TDS Linear(TDS) Site: SW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Irrigation Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 2021 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 03/03/21 3.0 7.60 54.9 0.34 0.73 102 127 2.16 0.016 < 0.010 0.23 < 0.020 < 0.010 < 0.010 04/06/21 13.4 7.29 60.5 0.39 0.87 110 125 1.73 0.022 0.01 0.290 < 0.020 < 0.010 < 0.010 05/11/21 10.2 6.69 51.8 1.4 2.80 116 111 1.51 0.086 0.041 1.14 < 0.020 < 0.010 0.016 06/23/21 Dry 07/06/21 Dry 08/04/21 Dry 09/09/21 Dry 10/06/21 13.7 7.44 61.9 0.57 1.80 104 133 1.88 0.031 0.018 0.203 < 0.020 < 0.010 < 0.010 11/04/21 9.3 7.59 59.5 0.66 1.64 120 137 2.63 0.051 < 0.010 0.413 < 0.020 < 0.010 < 0.010 Maximum 13.7 7.60 61.9 1.4 2.8 120 137 2.63 0.086 0.041 1.14 < 0.020 < 0.010 0.016 Minimum 3.0 6.69 51.8 0.34 0.73 102 111 1.51 0.016 < 0.010 0.203 < 0.020 < 0.010 < 0.010 Average 9.9 7.32 57.7 0.7 1.6 110 127 1.98 0.041 0.018 0.455 < 0.020 < 0.010 0.011 #Tests 5 5 5 5 5 5 5 5 5 5 0 0 5 5 5 5 Site: SW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Irrigation Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 2021 Oil & Coliforms Fecal<--------------------------Blu(Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep Colonies Filaments Filaman Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 03/03/21 0.23 228 3.0 7.51 4.51 04/06/21 0.290 613 < 1 8.09 3.94 05/11/21 1.16 1730 21.1 7.14 2.86 06/23/21 07/06/21 08/04/21 09/09/21 10/06/21 0.203 2420 158 6.66 3.98 11/04/21 0.413 3060 34.5 8.02 11.0 Maximum 1.16 3,060 158 0 0 0 0 0 0 0 8.09 11.00 Minimum 0.203 228 < 1.0 0 0 0 0 0 0 0 6.66 2.86 Average 0.459 1,610 44 7.48 5.26 #Tests 5 0 0 0 0 0 0 0 0 5 5 0 0 0 0 0 0 0 0 5 5 0 Site: SW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT SW-08 Stream: Irrigation Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA Irrigation I From: 1981 To: 2021 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOO Grease Ca Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 81 13.2 7.72 61 2.24 17 116 134 0.04 0.02 2.51 0.37 0.03 0.50 13 1 < 1 82 15.3 7.53 57 2.40 8 98 119 0.04 0.04 2.16 0.47 0.02 0.70 17 1 < 1 83 13.8 7.72 56 3.62 12 96 117 1.4 0.11 0.04 2.33 0.38 0.06 0.01 0.10 0.49 13 1 < 1 84 14.2 7.56 57 4.59 18 88 114 1.1 0.12 0.05 2.51 0.39 0.07 <0.01 0.15 0.55 10 1 < 1 10.55 85 14.2 7.63 57 3.53 21 85 116 1.9 0.12 0.15 2.63 0.38 0.06 <0.01 0.11 0.49 13 1 < 1 11.03 86 12.4 7.63 55 3.52 18 89 111 1.3 0.13 0.02 2.50 0.38 0.05 <0.01 0.19 0.57 14 1 2 10.49 87 13.4 7.28 57 2.48 13 93 119 1.8 0.10 0.02 2.28 0.32 0.03 <0.01 0.14 0.48 10 1 < 1 11.23 88 12.7 7.63 55 3.03 19 95 117 1.3 0.07 0.01 1.98 0.40 0.04 <0.01 0.16 0.58 8 1 < 1 11.55 89 13.7 7.49 53 2.79 12.9 94 118 1.5 0.08 0.02 2.17 0.45 0.06 <0.01 0.12 0.58 12 1.5 < 1 10.73 90 14.1 7.56 54 4.01 23.5 102 111 1.2 0.09 0.03 0.03 2.18 0.44 0.03 <0.01 0.16 0.61 16 1.4 < 1 11.53 91 15.0 7.28 57 2.19 8.3 98 122 1.3 0.05 0.02 0.02 2.21 0.36 0.04 0.01 0.16 0.54 18 1.1 1 11.70 92 14.5 7.53 54 2.44 12.7 96 122 1.3 0.07 0.02 0.02 2.19 0.46 0.03 0.01 0.13 0.60 14 1.3 < 1 11.46 93 13.2 7.59 55 2.78 13.7 99 124 1.6 0.07 0.02 0.02 2.36 0.42 0.03 0.01 0.32 0.75 14 1.2 < 1 12.12 94 13.3 7.40 49 2.87 11.3 96 127 1.6 0.08 0.02 0.02 2.40 0.50 0.03 0.01 0.35 0.86 6 1.3 < 1 13.42 95 13.7 7.42 60 1.80 9.1 104 129 1.7 0.07 0.02 0.02 2.08 0.48 0.02 0.01 0.34 0.84 7 1.5 1 12.40 96 14.5 7.62 55 4.89 22.7 96 118 1.5 0.10 0.03 0.02 2.14 0.44 0.03 0.01 0.33 0.78 5 1.4 1 10.98 97 13.6 7.66 52 4.25 20.4 97 109 1.8 0.10 0.04 0.02 2.63 0.40 0.03 0.01 0.40 0.81 12 1.8 1 11.18 98 13.7 7.23 52 3.42 27.2 91 109 1.8 0.09 0.02 0.01 2.38 0.42 0.02 <0.01 0.26 0.69 6 1.1 < 1 10.28 99 15.6 7.31 49 3.08 17.8 90 111 1.6 0.07 0.02 0.01 2.30 0.44 0.02 <0.01 0.27 0.72 9 1.0 9.79 00 13.9 7.13 49 3.37 33.6 91 109 1.6 0.09 0.02 0.02 2.16 0.46 0.03 <0.01 0.20 0.66 17 1.1 9.06 01 15.8 7.45 55 5.24 15.4 98 122 1.9 0.16 0.03 0.02 2.42 0.40 0.03 <0.01 0.16 0.56 14 0.7 10.38 02 16.0 7.32 60 3.70 20.2 100 127 1.6 0.06 0.02 0.02 2.24 0.39 0.05 <0.01 0.12 0.52 10 0.9 11.66 03 13.1 7.46 57 6.40 19.0 97 114 1.6 0.06 0.02 0.02 2.30 0.47 0.03 <0.02 0.13 0.62 15 0.8 12.29 04 17.2 7.52 58 15.68 40.1 98 122 1.8 0.13 0.02 0.03 2.70 0.79 0.04 <0.01 0.17 0.97 19 1.9 11.05 05 14.1 7.13 54 4.31 10.1 101 105 1.5 0.05 0.03 0.02 2.05 0.45 0.03 <0.01 0.09 0.55 9 1.3 10.59 06 16.7 6.97 58 2.55 4.7 103 112 1.5 0.09 0.03 0.02 2.21 0.36 0.04 <0.01 0.03 0.40 12 1.6 11.36 07 13.8 7.43 57 6.78 18.0 102 125 1.7 0.07 0.02 0.02 3.05 0.46 0.03 <0.01 0.06 0.53 22 1.2 11.57 08 16.2 7.56 55 11.24 28.3 100 113 1.8 0.10 0.02 0.01 2.60 0.70 0.02 <0.01 0.02 0.72 22 1.7 10.91 09 14.3 7.39 53 13.06 45.5 100 115 1.5 0.10 0.02 0.01 2.53 0.90 0.03 <0.01 0.05 0.96 28 1.5 10.73 10 12.7 7.15 46 4.98 14.1 94 104 1.6 0.07 0.02 0.01 2.62 0.61 0.04 <0.01 0.04 0.66 35 1.6 9.29 11 15.4 7.45 52 7.60 14.7 101 108 1.5 0.09 0.02 0.01 2.94 0.68 0.02 0.01 0.03 0.72 19 2.0 9.72 12 16.2 6.93 60 7.77 16.1 101 125 1.5 0.07 0.01 0.02 2.43 0.56 0.03 <0.01 0.03 0.59 1.5 11.41 13 14.6 7.11 64 5.43 18.7 114 133 1.7 0.09 0.02 0.02 3.06 0.59 0.03 <0.01 0.01 0.59 1.2 12.75 14 11.4 7.03 58 9.56 29.4 109 131 1.9 0.23 0.02 0.02 3.75 0.90 0.04 0.02 0.01 0.91 2.2 11.93 15 13.6 6.84 57 26.90 92.3 126 143 2.4 0.47 0.03 0.01 3.71 1.38 0.08 <0.01 0.02 1.39 12.74 16 13.4 6.58 68 2.26 7.4 136 146 1.6 0.12 0.05 3.58 0.87 0.02 <0.01 0.02 0.88 13.62 17 15.3 6.76 71 5.46 22.7 147 165 2.4 0.14 0.04 3.30 1.23 0.03 <0.01 0.02 1.24 14.74 18 12.5 7.29 48 0.90 1.6 134 132 3.2 0.07 0.02 1.45 <0.02 <0.01 <0.01 1.45 19 15.1 7.58 61 4.19 11.4 119 133 1.8 0.11 0.04 0.79 <0.02 <0.01 0.05 0.84 20 12.1 7.32 61 2.42 5.4 114 136 1.9 0.15 0.03 0.62 0.03 <0.01 0.03 0.64 21 9.9 7.32 58 0.67 1.6 110 127 2.0 0.04 0.02 0.46 <0.02 <0.01 0.01 0.46 Maximum 17.2 7.72 71 26.9 92.3 147 165 3.2 0.47 0.05 0.15 3.75 1.45 0.08 0.02 0.40 1.45 35 2.2 2 14.74 Minimum 9.9 6.58 46 0.67 1.6 85 104 1.1 0.04 0.01 0.01 1.98 0.32 0.02 <0.01 <0.01 0.40 5 0.7 < 1 9.06 Average 14.1 7.35 56 5.1 18.9 103 122 1.7 0.10 0.02 0.02 2.53 0.57 0.03 0.01 0.13 0.71 14 1.3 1 11.36 #Tests 41 41 41 41 41 41 41 39 41 32 35 37 41 41 39 39 41 31 34 18 34 Site: SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2021 Coliforms Fecal/ Fecal <--------------------------Blue Green Algae-------------------------------> Single Hard- Mg Na SAR Na Total E.coli Strep <------Colonies------> <-----Filaments------> <---Filamaments---> Cells D.O. SO4 ness Year mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 81 2,064 752 392 18 75 61 424 4 160 15 82 6,870 1,963 381 36 95 67 438 8 205 45 83 1,785 672 132 10 20 37 385 30 1,852 20 8.02 2.50 46 84 2.66 8.28 0.59 30.6 3,100 893 409 74 2 5 21 517 718 7 7.70 1.52 40 85 2.64 8.51 0.60 30.6 2,463 471 207 0 0 0 0 185 5 0 7.53 1.01 40 86 3.05 6.59 0.46 25.4 1,830 407 546 0 0 0 0 115 3 646 7.64 9.25 38 87 2.71 8.28 0.66 29.9 891 669 213 0 0 23 508 69 3 4,778 7.90 6.12 40 88 2.81 8.77 0.60 30.7 3,368 496 300 0 0 0 0 25 0 201 8.94 5.01 89 2.58 8.02 0.56 30.0 5,282 2,973 4,245 0 0 0 0 69 3 324 7.42 5.79 90 2.66 8.88 0.60 31.1 3,842 1,739 4,354 0 0 0 0 0 0 0 6.90 6.53 41 91 2.82 7.68 0.52 27.6 3,651 203 130 0 0 0 0 0 0 0 7.16 6.70 41 92 2.58 8.45 0.58 30.2 6,618 844 220 0 0 0 0 0 0 0 7.62 7.07 44 93 2.83 8.80 0.59 29.5 2,638 114 80 0 0 0 0 0 0 0 8.10 6.95 37 94 3.13 9.35 0.59 29.7 2,548 309 580 0 0 6 8 0 0 0 7.49 7.01 39 95 2.77 9.72 0.65 31.9 2,694 651 1,315 0 0 0 0 0 0 0 8.03 6.13 43 96 2.59 8.99 0.63 32.3 3,420 2,091 994 0 0 0 0 0 0 0 7.55 2.86 7 97 2.73 8.50 0.58 30.3 3,222 1,518 330 0 0 0 0 0 0 0 8.03 3.86 38 98 2.46 8.62 0.62 32.3 2,963 1,336 390 0 0 0 0 0 0 0 8.08 3.87 40 99 2.48 8.99 0.66 33.5 4,543 2,312 160 0 0 0 0 0 0 0 7.49 4.41 00 2.57 8.12 0.61 32.4 5,586 2,661 160 0 0 0 0 0 0 0 8.69 4.55 01 2.81 9.42 0.68 33.8 5,100 3,388 580 0 0 0 0 0 0 0 7.53 4.87 02 2.73 9.96 0.68 33.5 3,269 1,263 152 0 0 8 59 0 0 0 6.44 4.48 03 3.09 10.71 0.70 33.6 2,217 577 235 0 0 0 0 0 0 0 7.32 4.29 04 2.87 8.96 0.62 31.2 2,809 374 92 0 0 4 70 0 0 0 6.35 5.06 05 2.59 9.18 0.65 33.3 4,024 1,152 230 0 0 0 0 0 0 0 6.63 4.94 06 2.60 9.80 0.69 33.9 1,469 595 43 0 0 0 0 0 0 0 6.37 3.26 07 2.79 10.01 0.69 33.0 1,632 161 227 0 0 0 0 0 0 0 6.84 5.59 08 2.72 9.50 0.66 32.7 3,643 3,020 255 0 0 0 0 0 0 0 6.32 4.62 09 2.67 9.75 0.69 33.8 5,688 3,828 772 0 0 0 0 0 0 0 6.33 5.64 10 2.43 8.59 0.64 32.8 5,976 5,544 1,500 0 0 0 0 0 0 0 6.55 5.39 11 2.65 8.94 0.66 32.2 6,224 2,917 93 0 0 0 0 0 0 0 6.32 3.42 12 2.75 9.94 0.69 33.6 2,255 592 54 0 0 0 0 0 0 0 5.88 3.33 13 2.94 10.78 0.72 33.8 3,154 1,910 20 0 0 0 0 0 0 0 5.33 3.96 14 2.87 10.50 0.73 34.0 4,463 3,090 277 0 0 0 0 0 0 0 6.28 5.03 15 3.14 12.00 0.82 36.1 5,301 407 5.53 8.48 16 3.25 12.45 0.81 35.3 31,343 9,684 6.86 3.68 17 3.53 14.18 0.90 37.5 8,197 286 6.76 4.48 18 261 2 8.08 8.52 19 3,410 49 6.67 5.17 20 2,362 164 7.33 4.48 21 1,610 44 7.48 5.26 Maximum 3.53 14.18 0.90 37.5 31,343 9,684 4,354 74 95 67 508 517 1,852 4,778 8.94 9.25 46 Minimum 2.43 6.59 0.46 25.4 261 2 20 0 0 0 0 0 0 0 5.33 1.01 7 Average 2.78 9.39 0.65 32.1 4,239 1,515 590 4 6 6 56 30 87 178 7.17 5.00 38 #Tests 34 34 34 34 41 41 34 34 34 34 34 34 34 34 39 39 14 Site : SW-08 Nitrate-Nitrogen Total Phosphorus 0.5 0.5 0.4 0.4 0.3 0.3 J J � Ol 0.2 0.2 0.1 0.1 0.0 0.0 Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 10 250 9 8 200 7 6 150 J J rn 5 rn £ 4 £ 100 3 2 50 1 0 8182 83 84 85 86 87 88 89 90 9192 93 94 95 96 97 98 99 00 0102 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 0 0'` 0`5 Oh 01 0q A O, Oh 9, O1'' O^ 00 O`'� O^ 00 ^N N3 Nh N\ NO Chlorides Linear(Chlorides) TDS Linear(TDS) IRRIGATION DITCHES Site: SW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: ICR Effluent ALPINE COUNTY SURFACEWATER QUALITY DATA 2021 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L No Samples Collected Maximum Minimum Average #Tests 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Site: SW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: ICR Effluent ALPINE COUNTY SURFACEWATER QUALITY DATA 2021 Oil & Coliforms Fecal <-Blue Green Algae-> Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep Colonies Filaments Filamame Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L Maximum 0 0 0 0 0 0 0 Minimum 0 0 0 0 0 0 0 Average #Tests 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Site: SW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT SW-11 Stream: ICR Effluent ALPINE COUNTY SURFACEWATER QUALITY DATA ICR Effluent From: 2000 To: 2021 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Ca Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 00 5.2 7.22 103 0.060 01 7.0 7.46 51 8.31 9.4 78 109 1.4 0.060 <0.010 0.01 2.15 0.680 <0.100 <0.010 <0.010 0.700 12.00 02 8.1 6.74 8.20 4.9 110 1.7 0.040 <0.010 0.680 0.050 <0.010 <0.010 0.700 22 03 8.4 7.72 5.05 14.8 86 1.7 0.040 0.010 0.777 0.022 0.010 0.010 0.797 04 No samples collected 05 6.2 7.78 45 7.05 5.6 69 96 2.1 0.037 <0.010 0.586 0.028 <0.010 0.060 0.656 06 No samples collected 07 10.3 7.86 46 11.7 71 106 1.5 0.073 <0.010 0.650 0.033 <0.010 <0.010 0.670 23 08 7.5 8.31 54 6.2 83 113 2.0 0.068 0.012 1.100 0.082 <0.010 0.172 1.282 33 09 No samples collected 10 8.7 8.00 52 7.3 79 114 2.0 0.058 <0.010 1.510 0.027 <0.010 <0.010 1.530 11 No samples collected 12 No samples collected 13 No samples collected 14 9.0 7.82 50 2.00 3.5 71 94 1.3 0.035 <0.010 2.26 0.787 0.020 <0.010 <0.010 0.787 10.20 15 No samples collected 16 No samples collected 17 No samples collected 18 No samples collected 19 3.8 7.44 60 71 1.2 0.060 0.010 0.470 <0.020 <0.010 0.022 0.492 20 No samples collected 21 No samples collected Maximum 10.3 8.31 54 8.31 14.8 83 114 2.1 0.073 0.012 0.01 2.26 1.510 0.100 0.010 0.172 1.530 33 12.00 Minimum 3.8 6.74 45 2.00 3.5 60 71 1.2 0.035 <0.010 0.01 2.15 0.470 <0.020 <0.010 <0.010 0.492 22 10.20 Average 7.4 7.64 50 6.12 7.9 73 100 1.6 0.053 0.010 0.01 2.21 0.804 0.042 0.010 0.035 0.846 26 11.10 #Tests 10 10 6 5 8 7 10 9 10 9 1 2 9 9 9 9 9 3 0 0 2 Site: SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: ALPINE COUNTY SURFACEWATER QUALITY DATA From: 2000 To: 2021 Coliforms Fecal/ Fecal <--------------------------Blue Green Algae-------------------------------> Single Hard- Mg Na SAR Na Total E.coli Strap <------Colonies------> <-----Filaments------> <---Filamaments---> Cells D.O. SO4 ness Year mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 00 01 2.02 6.62 0.47 26.0 17 <17 4.28 02 03 10.85 4.06 04 05 10.80 2.08 06 07 3 <3 10.11 2.73 08 8 <2 11.29 4.38 09 10 13 <2 4.08 11 12 13 14 2.42 7.03 0.51 28.5 29 < 1 9.28 2.50 15 16 17 18 19 11.2 1.33 20 21 Maximum 2.42 7.03 0.51 28.5 29 17 0 0 0 0 0 0 0 11.29 4.38 Minimum 2.02 6.62 0.47 26.0 3 <1 0 0 0 0 0 0 0 9.28 1.33 Average 2.22 6.83 0.49 27.3 14 5 10.59 3.18 #Tests 2 2 2 2 5 5 0 0 0 0 0 0 0 0 6 8 0 Site : SW-1 1 Nitrate-Nitrogen Total Phosphorus 0.5 0.5 0.4 0.4 0.3 0.3 J J E E 0.2 0.2 0.1 0.1 0.0 0.0 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 t Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 10 200 9 8 150 7 6 rn 5 at 100 E E 4 3 50 2 1 0 im 0 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 Chlorides Linear(Chlorides) t TDS Linear(TDS) Site: SW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Bruns Diversion ALPINE COUNTY SURFACEWATER QUALITY DATA 25" above Fredericksburg Ditch 2021 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 06/23/21 17.8 8.44 271 570 58.3 3.19 3.25 21.7 21.0 0.493 0.514 07/06/21 21.8 8.27 263 563 61.5 4.00 3.73 22.0 20.5 0.855 0.542 08/04/21 Dry 09/09/21 19.5 8.19 301 616 70.1 4.19 4.13 19.2 16.5 0.731 0.890 10/06/21 12.9 7.86 290 612 64.4 3.54 2.99 23.6 18.3 0.831 2.36 Maximum 21.8 8.44 301 616 70.1 4.19 4.13 23.6 21.0 0.86 2.36 Minimum 12.9 7.86 263 563 58.3 3.19 2.99 19.2 16.5 0.493 0.514 Average 18.0 8.19 281 590 63.6 3.73 3.53 21.6 19.1 0.728 1.08 #Tests 4 4 0 0 0 4 4 4 4 4 0 0 4 4 4 4 Site: SW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Bruns Diversion ALPINE COUNTY SURFACEWATER QUALITY DATA 25" above Fredericksburg Ditch 2021 Oil & Coliforms Fecal <--Blue Green Algae--> Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep ColonieE Filament Filamai Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 06/23/21 22.7 8.11 15.9 07/06/21 23.4 7.22 17.4 08/04/21 09/09/21 20.9 7.76 16.6 10/06/21 26.7 8.46 21.0 Maximum 26.70 8.46 21.0 Minimum 20.90 7.22 15.9 Average 23.43 7.89 17.7 #Tests 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4 4 0 Site: SW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Bruns Diversion ALPINE COUNTY SURFACEWATER QUALITY DATA 25"above From: 2001 Fredericksburg Ditch To: To: 2021 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 01 18.6 8.23 243 489 62.2 2.69 2.56 15.37 13.97 0.59 1.44 17.39 03 17.5 8.01 296 436 57.2 2.48 2.26 11.48 9.00 1.97 2.78 16.23 03 17.0 7.93 241 465 58.2 2.56 2.35 13.92 11.50 0.71 2.77 17.40 04 17.7 8.16 243 490 61.8 3.13 2.95 14.48 13.51 0.68 2.89 18.04 05 16.1 7.83 217 361 39.1 2.37 2.32 10.14 9.17 0.55 1.78 12.47 06 17.5 8.24 229 438 47.4 2.57 2.40 14.26 13.12 0.53 1.69 16.52 07 18.2 8.26 270 503 56.0 3.19 2.90 16.92 14.24 0.63 1.22 18.77 08 17.4 8.25 254 470 54.7 3.31 2.99 12.68 10.19 0.88 2.58 16.13 09 20.2 8.38 259 503 53.6 3.40 3.20 13.13 12.17 1.15 2.24 9.91 10 17.5 8.25 257 483 53.6 3.14 2.95 12.00 9.95 1.15 2.93 16.07 11 18.2 8.35 205 388 43.7 1.99 1.90 8.30 6.11 1.46 3.34 13.11 12 20.6 8.45 256 468 52.6 2.98 2.73 11.91 9.27 1.82 4.21 17.94 13 18.0 8.02 252 448 50.6 2.65 2.54 11.85 9.59 0.86 4.01 16.72 14 17.3 8.16 286 524 44.6 3.31 2.28 15.63 11.92 0.55 3.74 19.93 15 17.0 7.97 278 489 53.8 3.27 3.11 10.64 8.48 1.79 6.10 18.53 16 14.8 7.50 33.3 200 382 33.5 2.28 1.67 9.29 7.43 0.68 2.02 11.99 17 17.4 7.97 173 324 35.5 1.54 1.38 10.85 5.42 0.98 2.90 14.72 18 19.6 8.21 272 549 60.7 3.26 2.39 19.15 16.75 0.70 1.38 21.23 19 17.9 8.27 257 558 58.7 3.04 2.73 18.33 16.87 0.72 2.14 21.18 20 17.1 8.40 280 605 63.7 3.60 3.41 20.2 20.18 0.848 1.18 22.2 21 18.0 8.19 281 590 63.6 3.73 3.53 21.625 19.075 0.728 1.08 23.425 Maximum 20.6 8.45 33.3 296 605 63.7 3.73 3.53 21.63 20.18 1.97 6.10 23.43 Minimum 14.8 7.50 33.3 173 324 33.5 1.54 1.38 8.30 5.42 0.53 1.08 9.91 Average 17.8 8.14 33.3 250 474 52.6 2.88 2.60 13.91 11.81 0.95 2.59 17.14 #Tests 21 21 0 0 1 21 21 21 21 21 0 0 21 21 21 21 21 0 0 0 Site: SW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Bruns Diversion ALPINE COUNTY SURFACEWATER QUALITY DATA 25"above From: 2001 Fredericksburg Ditch To: 2021 Coliforms Fecal/ Fecal <--------------------------Blue Green Algae-------------------------------> Single Hard- Ca Mg Na SAR Na Total E.coli Strap <------Colonies------> <-----Filaments------> <---Filamaments---> Cells D.O. SO4 ness Year mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 01 7.95 18.72 03 6.44 16.96 03 6.82 18.70 04 8.27 16.85 05 6.96 13.11 06 7.53 13.26 07 6.94 15.22 08 7.31 15.28 09 7.70 15.80 10 6.35 15.55 11 7.58 12.47 12 6.32 15.17 13 6.53 15.50 14 7.17 12.29 15 7.85 18.10 16 9.23 9.59 17 7.78 8.92 18 7.51 13.90 19 7.19 14.5 20 8.27 16.5 21 7.89 17.7 Maximum 0 0 0 0 0 0 0 9.23 18.72 Minimum 0 0 0 0 0 0 0 6.32 8.92 Average 7.41 14.95 #Tests 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 21 21 0 Site : SW-12 Nitrate-Nitrogen Total Phosphorus 10.0 10.0 9.0 9.0 8.0 8.0 7.0 7.0 6.0 6.0 rn 5.0 rn 5.0 E E 4.0 4.0 3.0 3.0 2.0 A 2.0 1.0 1.0 0.0 0.0 01 03 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 01 03 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 100 500 90 80 400 70 60 300 J J rn 50 rn E E 40 200 30 20 100 10 0 0 01 03 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 01 03 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 Chlorides Linear(Chlorides) TDS Linear(TDS) Site: SW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredericksburg Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 100' below confluence with reclaimed water 2021 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 6/23/2021 16.4 7.33 267 508 48.8 3.16 2.92 16.7 14.7 0.404 1.65 7/6/2021 18.5 8.00 67 89.0 2.14 0.042 0.019 0.169 < 0.020 < 0.010 0.043 8/4/2021 20.2 8.18 63 90.0 1.84 0.036 0.022 0.170 0.021 < 0.010 0.019 9/9/2021 18.5 8.25 264 544 57.9 3.56 3.49 16.1 14.1 0.643 0.770 10/6/2021 11.6 8.05 77 98.1 1.83 0.024 0.022 0.057 < 0.020 < 0.010 < 0.010 Maximum 20.2 8.25 267 544 57.90 3.560 3.490 16.70 14.70 0.643 1.650 Minimum 11.6 7.33 63 89 1.83 0.024 0.019 0.057 < 0.020 < 0.010 < 0.010 Average 17.0 7.96 148 266 22.50 1.364 1.295 6.639 5.772 0.215 0.498 #Tests 5 5 0 0 0 5 5 5 5 5 0 0 5 5 5 5 Site: SW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredericksburg Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 100' below confluence with reclaimed water 2021 Oil & Coliforms Fecal---Blue Green Algae--------Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep Colonies Filaments FilamamE Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN #cells # cells # um 4 cells mg/L mg/L mg/L 6/23/2021 18.8 6.87 14.0 7/6/2021 0.212 8.08 2.02 8/4/2021 0.189 7.92 2.56 9/9/2021 17.6 7.98 14.6 10/6/2021 0.057 9.36 2.53 Maximum 18.8 9.36 14.60 Minimum 0.057 6.87 2.02 Average 7.372 8.04 7.14 #Tests 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5 5 0 Site: SW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredericksburg Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 100'below confluence From: 2001 with reclaimed water To: 2021 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOO Grease Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 01 16.3 7.72 106 179 16.3 0.63 0.61 3.79 4.40 0.16 0.40 4.35 02 13.2 7.72 101 153 14.4 0.73 0.53 1.99 1.97 0.20 0.74 2.93 03 12.7 7.80 97 155 13.8 0.60 0.53 3.21 2.73 0.16 0.48 3.85 04 12.6 7.65 108 178 17.1 0.89 0.77 3.68 3.56 0.18 0.77 4.63 05 11.8 7.61 85 115 10.1 0.48 0.47 1.88 1.53 0.14 0.36 2.38 06 12.5 7.72 106 171 15.6 0.79 0.72 5.08 4.39 0.14 0.50 5.72 07 13.5 7.71 98 152 11.6 0.57 0.51 2.91 2.33 0.11 0.20 3.21 08 13.4 7.86 144 252 25.4 1.50 1.37 5.76 4.53 0.46 1.33 7.55 09 13.6 7.68 103 174 14.7 0.94 0.85 3.10 2.70 0.30 0.62 4.02 10 10.3 7.37 77 105 7.3 0.31 0.28 0.87 0.64 0.09 0.61 1.57 11 13.0 8.28 114 182 15.8 0.76 0.71 2.89 1.97 0.61 1.24 4.74 12 12.7 7.16 73 91 4.5 0.20 0.17 0.61 0.23 0.10 0.59 1.30 13 15.8 7.56 86 133 8.6 0.44 0.42 1.75 1.23 0.14 0.48 2.36 14 16.1 7.89 105 185 13.7 0.71 0.67 2.43 2.45 0.16 1.11 3.68 15 14.0 7.39 78 117 5.8 0.28 0.25 0.85 0.51 0.12 0.61 1.57 16 12.5 7.40 0.8 116 190 17.0 1.02 0.83 3.30 2.61 0.31 1.06 4.66 17 12.3 7.62 66 90 5.6 0.21 0.17 0.78 0.46 0.14 0.44 1.36 18 15.9 7.87 116 199 17.7 0.94 1.22 1.71 4.87 0.22 0.38 1.87 19 11.6 8.12 58 84 3.41 0.18 0.15 0.84 0.74 0.05 0.13 1.02 20 15.5 8.24 125 236 19.7 0.93 0.90 5.55 4.90 0.43 0.47 6.35 21 17.0 7.96 148 266 22.5 1.36 1.29 6.64 5.77 0.22 0.50 7.37 Maximum 17.0 8.28 0.8 148 266 25.4 1.50 1.37 6.64 5.77 0.61 1.33 7.55 Minimum 10.3 7.16 0.8 58 84 3.4 0.18 0.15 0.61 0.23 0.05 0.13 1.02 Average 13.6 7.73 0.8 100 162 13.4 0.69 0.64 2.84 2.60 0.21 0.62 3.64 #Tests 21 21 0 0 1 21 21 21 21 21 0 0 21 21 21 21 21 0 0 0 Site: SW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredericksburg Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 100'below confluence From: 2001 with reclaimed water To: 2021 Coliforms Fecal/ Fecal <--------------------------Blue Green Algae-------------------------------> Single Hard- Ca Mg Na SAR Na Total E.coli Strep <------Colonies------> <-----Filaments------> <---Filamaments---> Cells D.O. SO4 ness Year mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 01 8.56 6.10 02 8.50 5.69 03 7.93 5.42 04 7.81 5.66 05 8.36 4.03 06 8.07 5.40 07 8.10 4.44 08 8.20 8.04 09 8.62 5.09 10 7.45 3.31 11 8.88 5.37 12 8.33 2.68 13 6.94 4.03 14 7.87 5.26 15 8.93 3.64 16 9.27 5.72 17 9.01 2.04 18 8.47 4.50 19 9.19 1.93 20 8.68 5.91 21 8.04 7.14 Maximum 0 0 0 0 0 0 0 9.27 8.04 Minimum 0 0 0 0 0 0 0 6.94 1.93 Average 8.34 4.83 #Tests 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 21 21 0 Site : SW-13 Nitrate-Nitrogen Total Phosphorus 5.0 5.0 4.0 4.0 3.0 3.0 J J E E 2.0 2.0 1.0 1.0 0.0 0.0 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 50 500 40 400 30 300 J J a1 a1 £ £20 200 10 100 V V V V V 0 0 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 Chlorides Linear(Chlorides) t TDS Linear(TDS) Site: SW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Celio Tailwater ALPINE COUNTY SURFACEWATER QUALITY DATA @ Brooke Diversion 2021 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 06/23/21 21.8 7.98 274 546 54.6 2.77 2.85 15.8 15.2 1.79 1.77 07/06/21 18.4 7.77 326 514 54.2 2.56 2.40 2.49 1.63 0.077 4.07 08/04/21 18.0 7.95 418 661 67.2 1.85 1.77 1.36 0.055 < 0.010 0.361 09/09/21 17.3 7.40 379 620 73.0 2.66 2.58 4.57 3.10 0.354 2.97 10/06/21 12.0 8.01 314 590 66.2 2.35 2.27 11.6 9.63 0.326 3.72 Maximum 21.8 8.01 418 661 73.0 2.77 2.850 15.8 15.2 1.790 4.07 Minimum 12.0 7.40 274 514 54.2 1.850 1.770 1.36 0.06 < 0.010 0.361 Average 17.5 7.82 342 586 63.0 2.44 2.37 7.16 5.92 0.511 2.58 #Tests 5 5 0 0 0 5 5 5 5 5 0 0 5 5 5 5 Site: SWA5 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Celio Tailwater ALPINE COUNTY SURFACEWATER QUALITY DATA @ Brooke Diversion 2021 Oil & Coliforms Fecal <--------------------------Blue Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep <------Cc<-----Fila<---Filai Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 06/23/21 19.4 5.12 15.1 07/06/21 6.64 6.50 14.0 08/04/21 1.72 7.75 11.2 09/09/21 7.90 6.79 17.0 10/06/21 15.7 9.49 18.8 Maximum 19.4 9.49 18.8 Minimum 1.72 5.12 11.20 Average 10.3 7.13 15.2 #Tests 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5 5 0 Site: SW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Celio Tailwater ALPINE COUNTY SURFACEWATER QUALITY DATA @ Brooke Diversion From: 2001 To: 2021 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 01 15.7 7.73 245 398 44.0 1.40 1.35 4.43 2.96 0.29 1.39 6.11 02 14.1 7.69 220 325 36.9 1.27 1.13 2.98 1.94 0.18 1.87 5.03 03 13.5 7.45 255 395 44.6 1.35 1.24 2.72 2.14 0.24 2.96 5.92 04 13.2 7.49 228 373 46.2 1.80 1.76 5.15 4.77 0.27 3.41 8.83 05 12.1 7.42 173 239 27.3 1.23 1.20 3.61 2.98 0.15 1.77 5.53 06 13.8 7.47 207 311 33.7 1.54 1.49 4.98 4.02 0.29 3.12 8.39 07 13.7 7.65 268 413 46.7 2.08 1.95 6.47 4.77 0.25 2.31 9.02 08 13.7 7.60 221 348 39.9 1.83 1.70 3.44 2.59 0.32 3.42 6.15 09 12.8 7.50 173 250 21.1 0.95 0.64 1.39 0.05 0.04 1.00 2.43 10 10.5 7.71 116 160 15.2 0.54 0.49 0.48 0.02 0.07 1.10 1.64 11 14.4 7.88 189 204 33.0 1.09 0.89 1.94 0.67 0.28 2.33 4.55 12 13.4 7.23 189 314 27.3 1.27 1.09 5.80 4.15 0.17 1.04 7.01 13 17.8 7.48 313 494 52.8 1.89 1.66 3.01 3.59 0.36 3.09 5.34 14 17.2 7.56 291 520 54.0 2.76 2.20 6.01 5.47 0.71 4.09 10.81 15 17.3 7.47 296 478 46.2 2.22 2.04 4.84 3.40 0.91 4.40 10.11 16 17.7 7.23 1.2 267 433 43.7 1.83 1.63 4.25 3.00 0.70 2.44 7.38 17 19.7 7.73 229 402 40.6 1.26 1.13 2.22 1.83 0.44 2.71 5.41 18 17.6 7.92 264 432 49.0 2.22 1.54 9.94 10.59 0.46 2.29 12.69 19 13.9 7.73 278 498 52.8 2.36 2.17 7.01 6.09 0.31 4.98 12.30 20 17.3 7.78 314 533 57.9 2.38 2.27 6.38 5.80 0.41 3.85 10.75 21 17.5 7.822 342 586.2 63.0 2.44 2.37 7.16 5.92 0.51 2.58 10.272 Maximum 19.7 7.92 1.2 342 586 63.0 2.76 2.37 9.94 10.59 0.91 4.98 12.69 Minimum 10.5 7.23 1.2 116 160 15.2 0.54 0.49 0.48 0.02 0.04 1.00 1.64 Average 15.1 7.60 1.2 242 386 41.7 1.70 1.52 4.49 3.65 0.35 2.67 7.41 #Tests 21 21 0 0 1 21 21 21 21 21 0 0 21 21 21 21 21 0 0 0 Site: SW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Celio Tailwater ALPINE COUNTY SURFACEWATER QUALITY DATA @ Brooke Diversion From: 2001 To: 2021 Coliforms Fecal/ Fecal <--------------------------Blue Green Algae-------------------------------> Single Hard- Ca Mg Na SAR Na Total E.coli Strap <------Colonies------> <-----Filaments------> <---Filamaments---> Cells D.O. SO4 ness Year mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 01 7.99 14.47 02 8.34 10.85 03 5.36 14.46 04 6.54 11.95 05 7.03 8.55 06 6.24 10.43 07 6.32 12.81 08 6.76 11.13 09 7.80 6.66 10 7.14 6.31 11 7.17 8.81 12 8.30 7.58 13 8.04 17.43 14 6.04 15.86 15 5.93 15.34 16 8.30 14.03 17 6.82 9.96 18 6.72 12.39 19 7.34 13.2 20 8.82 13.2 21 7.13 15.2 Maximum 0 0 0 0 0 0 0 8.82 17.43 Minimum 0 0 0 0 0 0 0 5.36 6.31 Average 7.15 11.93 #Tests 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 21 21 0 Site : SW-15 Nitrate-Nitrogen Total Phosphorus 10.0 10.0 9.0 9.0 8.0 8.0 7.0 7.0 6.0 6.0 rn 5.0 rn 5.0 E E 4.0 4.0 3.0 3.0 2.0 2.0 1.0 1.0 0.0 0.0 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 ---o—Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 100 500 90 80 400 70 60 300 J J rn 50 at E E 40 f 200 -- V4 30 20 100 10 0 0 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 Chlorides Linear(Chlorides) t TDS Linear(TDS) Site: SW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Drain Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA @ Fairview Lane 2021 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 06/23/21 18.3 7.63 195 282 18.4 0.094 0.037 0.685 0.030 < 0.010 0.023 07/06/21 24.1 7.75 156 249 17.6 0.085 0.032 0.403 < 0.020 < 0.010 < 0.010 08/04/21 24.0 7.65 148 238 16.7 0.076 0.030 0.323 < 0.020 < 0.010 < 0.010 09/09/21 20.1 7.54 160 255 17.3 0.091 0.030 0.371 < 0.020 < 0.010 0.014 10/06/21 14.7 7.44 155 254 17.8 0.054 0.017 0.185 < 0.020 < 0.010 0.012 Maximum 24.1 7.75 195 282 18.4 0.094 0.037 0.685 0.030 < 0.010 0.023 Minimum 14.7 7.44 148 238 16.70 0.054 0.017 0.185 < 0.020 < 0.010 < 0.010 Average 20.2 7.60 163 256 17.6 0.080 0.029 0.393 0.022 < 0.010 0.014 #Tests 5 5 0 0 0 5 5 5 5 5 0 0 5 5 5 5 Site: SW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Drain Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA @ Fairview Lane 2021 Oil & Coliforms Fecal <-Blue Green Algae-> Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep Colonies Filaments Fiiamamei Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 06/23/21 0.708 8.65 6.78 07/06/21 0.403 8.65 5.32 08/04/21 0.323 7.47 6.39 09/09/21 0.385 7.18 5.66 10/06/21 0.197 8.51 7.23 Maximum 0.71 8.65 7.23 Minimum 0.197 7.18 5.32 Average 0.40 8.09 6.28 #Tests 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5 5 0 Site: SW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT SW-16 Stream: Drain Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA Drain D @ Fairview Lane From: 2001 @ Fairy To: 2021 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOO Grease Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 01 02 14.5 7.53 177 263 21.5 0.060 0.020 0.460 0.050 <0.010 0.070 0.550 03 15.6 7.67 159 233 19.5 0.104 0.026 0.577 0.070 0.016 0.101 0.736 04 15.1 7.50 154 226 18.9 0.190 0.019 0.879 0.074 0.017 0.103 1.00 05 14.8 7.30 158 206 21.7 0.089 0.027 1.127 0.044 0.016 0.169 1.31 06 15.3 7.37 154 206 18.9 0.124 0.058 0.984 0.353 0.021 0.342 1.35 07 15.7 7.59 160 227 17.8 0.070 0.018 0.475 0.026 <0.010 0.084 0.569 08 15.6 7.70 165 244 20.3 0.075 0.029 0.735 0.064 0.033 0.160 0.928 09 17.1 7.64 193 301 23.5 0.597 0.333 2.358 1.439 0.134 1.18 3.67 10 14.8 7.43 192 282 25.7 0.146 0.032 0.790 0.035 <0.010 0.147 0.947 11 15.6 7.70 161 228 20.7 0.216 0.102 1.196 0.112 0.064 0.404 1.66 12 19.6 7.38 152 231 15.5 0.111 0.028 0.771 0.243 <0.010 0.145 0.925 13 18.0 7.31 181 253 19.9 0.096 0.030 0.742 0.074 0.031 0.152 0.911 14 19.0 7.60 196 266 20.7 0.060 0.024 0.543 0.037 0.012 0.132 0.671 15 17.3 7.31 184 277 21.5 0.068 0.019 0.375 0.022 <0.010 0.011 0.377 16 17.7 7.24 3.3 183 273 22.5 0.093 0.025 0.684 0.024 0.011 0.049 0.733 17 18.5 7.25 177 251 17.9 0.169 0.046 1.100 0.044 0.011 0.125 1.23 18 19.4 7.82 171 255 19.6 0.117 0.046 0.593 0.021 0.013 0.052 0.646 19 17.6 7.69 140 201 15.5 0.176 0.049 0.989 0.225 0.019 0.269 1.27 20 18.1 7.90 153 227 15.6 0.068 0.025 0.484 0.062 0.014 0.24 0.73 21 20.2 7.60 163 256 17.6 0.080 0.029 0.393 0.022 <0.010 0.01 0.40 Maximum 20.2 7.90 3.3 196 301 25.7 0.597 0.333 2.358 1.439 0.134 1.18 3.67 Minimum 14.5 7.24 3.3 140 201 15.5 0.060 0.018 0.375 0.021 <0.010 0.011 0.377 Average 17.0 7.53 3.3 169 245 19.7 0.135 0.049 0.813 0.152 0.023 0.197 1.03 #Tests 20 20 0 0 1 20 20 20 20 20 0 0 20 20 20 20 20 0 0 0 Site: SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: itch ALPINE COUNTY SURFACEWATER QUALITY DATA iew Lane From: 2001 To: 2021 Coliforms Fecal/ Fecal <--------------------------Blue Green Algae-------------------------------> Single Hard- Ca Mg Na SAR Na Total E.coli Strap <------Colonies------> <-----Filaments------> <---Filamaments---> Cells D.O. SO4 ness Year mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 01 02 6.97 8.04 03 7.03 6.75 04 7.73 6.35 05 8.79 6.95 06 8.90 6.05 07 8.27 6.36 08 7.61 7.85 09 7.80 7.66 10 6.34 7.05 11 8.26 5.21 12 8.88 6.58 13 8.60 7.77 14 8.46 7.41 15 7.12 5.66 16 9.10 7.14 17 7.75 3.80 18 9.77 6.62 19 8.20 4.99 20 9.74 5.92 21 8.09 6.28 Maximum 0 0 0 0 0 0 0 9.77 8.04 Minimum 0 0 0 0 0 0 0 6.34 3.80 Average 8.17 6.52 #Tests 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 20 20 0 Site : SW-16 Nitrate-Nitrogen Total Phosphorus 5.0 1.0 0.9 4.0 0.8 0.7 3.0 0.6 J J rn rn 0.5 E E 2.0 0.4 0.3 1.0 0.2 0.1 0.0 0.0 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 t Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 50 250 40 200 30 150 J J a1 a1 E 20 E 100 10 50 0 0 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 Chlorides Linear(Chlorides) TDS Linear(TDS) TRIHALOMETHANES (THM) MTBE (Methyl tert-Butyl Ether) MONITORING E1'1VIR0riMEriTAJL!W. . , Analytical Chemists July 29, 2021 South Tahoe Public Utility District Lab ID : SP 2108497 1275 Meadow Crest Drive Customer 2-11369 South Lake Tahoe, CA 96150 Laboratory Report Introduction: This report package contains total of 17 pages divided into 3 sections: Case Narrative (2 pages) : An overview of the work performed at FGL. Sample Results (9 pages) : Results for each sample submitted. Quality Control (6 pages) : Supporting Quality Control (QC)results. Case Narrative This Case Narrative pertains to the following samples: Sample Description Date I Sampled R Dat ed FGL Lab ID # Matrix DD-01 Diamond Ditch@Beginning 06/23/2021 06/24/2021 SP 2108497-001 WW WW-05 Final Grab 06/23/2021 06/24/2021 SP 2108497-002 WW 11 HPR Harvey Place Reservoir 06/23/2021 06/24/2021 SP 2108497-003 1 WW Sampling and Receipt Information: All samples were received in acceptable condition and within temperature requirements, unless noted on the Condition Upon Receipt(CUR) form. All samples arrived at 6 'C. All samples were prepared and analyzed within the method specified hold time. All samples were checked for pH if acid or base preservation is required(except for VOAs). For details of sample receipt information, please see the attached Chain of Custody and Condition Upon Receipt Form. Quality Control: All samples were prepared and analyzed according to the following tables: Organic QC 5030B 07/01/2021:207378 All preparation quality controls are within established criteria(performed at FGL-SP ELAN 1573). 07/01/2021:210107 All analysis quality controls are within established criteria,except: The following note applies to 2,2-Dichloropropane,2-Hexanone,Acrolein,Acrylonitrile, Chloromethane(Methyl Chloride),Ethyl tert-Butyl Ether,Isopro: 8260B 360 CCV above Acceptance Range(AR). Samples which were non detect for this analyte were accepted. The following note applies to 2,2-Dichloropropane,2-Hexanone,Acrolein,Acrylonitrile, Chloromethane(Methyl Chloride),Ethyl tert-Butyl Ether,Isopro: 380 CCV met CCC and SPCC criteria,Results were reported. Page 1 of 17 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 July 29, 2021 Lab ID : SP 2108497 South Tahoe Public Utility District Customer : 2-11369 Certification:: I certify that this data package is in compliance with ELAP standards, both technically and for completeness, except for any conditions listed above. Release of the data contained in this data package is authorized by the Laboratory Director or his designee, as verified by the following electronic signature. KD:MKH Digitally signed by David Tea,B.A.,M.B.A. Approved By David Terz,B.A.,M.B.A. Title:QA Dueetor Date:2021-07-29 Page 2 of 17 ENVIRONMENTAINW. . , Analytical Chemists July 29, 2021 Lab ID : SP 2108497-001 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : June 23, 2021-10:13 South Lake Tahoe, CA 96150 Sampled By : Arce/Chernago/Uribe Received On : June 24, 2021-11:50 Matrix : Waste Water Description : DD-01 Diamond Ditch@Beginning Project : AG78156,AG78155,AG78157 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 4-Bromofluorobenzene$ 105 81-112 % 5030B 07/01/21:207378 8260B 07/01/21:210107 Dibromofluoromethane$ 110 67-133 % 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2-Dichloroethane-d4$ 106 70-129 % 5030B 07/01/21:207378 8260B 07/01/21:210107 Toluene-d8$ 110 71-119 % 5030B 07/01/21:207378 8260B 07/01/21:210107 Acetone ND 50 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Acrolein ND 50 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Acrylonitrile ND 50 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Benzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromochloromethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromodichloromethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromoform ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromomethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 tert-Butanol ND 5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 2-Butanone(MEK) ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 n-Butylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 sec-Butylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 tert-Butylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Carbon Disulfide ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Carbon Tetrachloride ND 1 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Chlorobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Chloroethane ND 1 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Chloroform ND 1 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Chloromethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 2-Chlorotoluene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 4-Chlorotoluene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Dibromochloromethane ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Dibromomethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2-Dichlorobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,3-Dichlorobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,4-Dichlorobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Dichlorodifluoromethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1-Dichloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2-Dichloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1-Dichloroethylene I ND 1 0.5 1 ug/L I I 5030B 07/01/21:207378 8260B 07/01/21:210107 Page 3 of 17 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 July 29, 2021 Lab ID : SP 2108497-001 Description : DD-01 Diamond Ditch@Beginning Customer ID 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 cis-1,2-Dichloroethylene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 trans-1,2-Dichloroethylene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2-Dichloropropane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,3-Dichloropropane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 2,2-Dichloropropane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1-Dichloropropene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,3-Dichloropropene(Total) ND -- ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 cis-1,3-Dichloropropene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 trans-1,3-Dichloropropene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Di-isopropyl ether(DIPE) ND 5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Ethyl Benzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Ethyl tert-butyl ether ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 (ETBE) Hexachlorobutadiene ND 5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 2-Hexanone ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Isopropylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 p-Isopropyltoluene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Methyl tert-butyl ether ND 0.2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 (MTBE) 4-Methyl-2-pentanone ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 (MIBK) Methylene Chloride ND 5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Naphthalene ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 n-Propylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Styrene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 tert-Amyl methyl ether (TAME) ND 5 ug/L 5030B 07/01/21:207378 8260B 07i01i21:210107 1,1,1,2-Tetrachloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1,2,2-Tetrachloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Tetrachloroethylene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Toluene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2,3-Trichlorobenzene ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2,4-Trichlorobenzene ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1,1-Trichloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1,2-Trichloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Trichloroethylene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Trichlorofluoromethane ND 1 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2,4-Trimethylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,3,5-Trimethylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Vinyl Acetate ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Vinyl Chloride ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Xylenes ND -- ug/L 5030B 07/01/21:207378 8260B L11 Page 4 of 17 July 29, 2021 Lab ID : SP 2108497-001 Description : DD-01 Diamond Ditch@Beginning Customer ID 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 Xylenes m,p ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Xylenes o ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 ND=Non-Detected.PQL=Practical Quantitation Limit.$Surrogate.*PQL adjusted for dilution. Page 5 of 17 ENVIRONMENTAINW. . , Analytical Chemists July 29, 2021 Lab ID : SP 2108497-002 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : June 23, 2021-10:46 South Lake Tahoe, CA 96150 Sampled By : B. Chernago Received On : June 24, 2021-11:50 Matrix : Waste Water Description : WW-05 Final Grab Project : AG78156,AG78155,AG78157 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 4-Bromofluorobenzene* 105 81-112 % 5030B 07/01/21:207378 8260B 07/01/21:210107 Dibromofluoromethanet 109 67-133 % 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2-Dichloroethane-d4$ 106 70-129 % 5030B 07/01/21:207378 8260B 07/01/21:210107 Toluene-d8$ 110 71-119 % 5030B 07/01/21:207378 8260B 07/01/21:210107 Acetone ND 50 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Acrolein ND 50 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Acrylonitrile ND 50 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Benzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromochloromethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromodichloromethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromoform ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromomethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 tert-Butanol ND 5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 2-Butanone(MEK) ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 n-Butylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 sec-Butylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 tert-Butylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Carbon Disulfide ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Carbon Tetrachloride ND 1 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Chlorobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Chloroethane ND 1 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Chloroform 2 1 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Chloromethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 2-Chlorotoluene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 4-Chlorotoluene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Dibromochloromethane ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Dibromomethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2-Dichlorobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,3-Dichlorobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,4-Dichlorobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Dichlorodifluoromethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1-Dichloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2-Dichloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1-Dichloroethylene I ND 1 0.5 1 ug/L I I 5030B 07/01/21:207378 8260B 07/01/21:210107 Page 6 of 17 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 July 29, 2021 Lab ID : SP 2108497-002 Description : WW-05 Final Grab Customer ID 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 cis-1,2-Dichloroethylene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 trans-1,2-Dichloroethylene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2-Dichloropropane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,3-Dichloropropane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 2,2-Dichloropropane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1-Dichloropropene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,3-Dichloropropene(Total) ND -- ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 cis-1,3-Dichloropropene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 trans-1,3-Dichloropropene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Di-isopropyl ether(DIPE) ND 5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Ethyl Benzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Ethyl tert-butyl ether ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 (ETBE) Hexachlorobutadiene ND 5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 2-Hexanone ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Isopropylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 p-Isopropyltoluene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Methyl tert-butyl ether ND 0.2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 (MTBE) 4-Methyl-2-pentanone ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 (MIBK) Methylene Chloride ND 5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Naphthalene ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 n-Propylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Styrene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 tert-Amyl methyl ether (TAME) ND 5 ug/L 5030B 07/01/21:207378 8260B 07i01i21:210107 1,1,1,2-Tetrachloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1,2,2-Tetrachloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Tetrachloroethylene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Toluene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2,3-Trichlorobenzene ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2,4-Trichlorobenzene ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1,1-Trichloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1,2-Trichloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Trichloroethylene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Trichlorofluoromethane ND 1 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2,4-Trimethylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,3,5-Trimethylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Vinyl Acetate ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Vinyl Chloride ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Xylenes I ND -- ug/L 5030B 07/01/21:207378 8260B L11 Page 7 of 17 July 29, 2021 Lab ID : SP 2108497-002 Description : WW-05 Final Grab Customer ID 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 Xylenes m,p ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Xylenes o ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 ND=Non-Detected.PQL=Practical Quantitation Limit.$Surrogate.*PQL adjusted for dilution. Page 8 of 17 ENVIRONMENTAINW. . , Analytical Chemists July 29, 2021 Lab ID : SP 2108497-003 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : June 23, 2021-13:32 South Lake Tahoe, CA 96150 Sampled By : Arce/Chernago/Uribe Received On : June 24, 2021-11:50 Matrix : Waste Water Description : HPR Harvey Place Reservoir Project : AG78156,AG78155,AG78157 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 4-Bromofluorobenzene$ 104 81-112 % 5030B 07/01/21:207378 8260B 07/01/21:210107 Dibromofluoromethane$ 110 67-133 % 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2-Dichloroethane-d4$ 103 70-129 % 5030B 07/01/21:207378 8260B 07/01/21:210107 Toluene-d8$ 109 71-119 % 5030B 07/01/21:207378 8260B 07/01/21:210107 Acetone ND 50 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Acrolein ND 50 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Acrylonitrile ND 50 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Benzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromochloromethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromodichloromethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromoform ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromomethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 tert-Butanol ND 5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 2-Butanone(MEK) ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 n-Butylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 sec-Butylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 tert-Butylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Carbon Disulfide ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Carbon Tetrachloride ND 1 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Chlorobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Chloroethane ND 1 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Chloroform ND 1 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Chloromethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 2-Chlorotoluene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 4-Chlorotoluene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Dibromochloromethane ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Dibromomethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2-Dichlorobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,3-Dichlorobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,4-Dichlorobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Dichlorodifluoromethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1-Dichloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2-Dichloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1-Dichloroethylene I ND 1 0.5 1 ug/L I I 5030B 07/01/21:207378 8260B 07/01/21:210107 Page 9 of 17 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 July 29, 2021 Lab ID : SP 2108497-003 Description : HPR Harvey Place Reservoir Customer ID 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 cis-1,2-Dichloroethylene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 trans-1,2-Dichloroethylene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2-Dichloropropane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,3-Dichloropropane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 2,2-Dichloropropane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1-Dichloropropene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,3-Dichloropropene(Total) ND -- ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 cis-1,3-Dichloropropene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 trans-1,3-Dichloropropene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Di-isopropyl ether(DIPE) ND 5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Ethyl Benzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Ethyl tert-butyl ether ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 (ETBE) Hexachlorobutadiene ND 5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 2-Hexanone ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Isopropylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 p-Isopropyltoluene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Methyl tert-butyl ether ND 0.2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 (MTBE) 4-Methyl-2-pentanone ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 (MIBK) Methylene Chloride ND 5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Naphthalene ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 n-Propylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Styrene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 tert-Amyl methyl ether (TAME) ND 5 ug/L 5030B 07/01/21:207378 8260B 07i01i21:210107 1,1,1,2-Tetrachloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1,2,2-Tetrachloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Tetrachloroethylene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Toluene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2,3-Trichlorobenzene ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2,4-Trichlorobenzene ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1,1-Trichloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1,2-Trichloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Trichloroethylene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Trichlorofluoromethane ND 1 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2,4-Trimethylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,3,5-Trimethylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Vinyl Acetate ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Vinyl Chloride ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Xylenes ND -- ug/L 5030B 07/01/21:207378 8260B L11 Page 10 of 17 July 29, 2021 Lab ID : SP 2108497-003 Description : HPR Harvey Place Reservoir Customer ID 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 Xylenes m,p ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Xylenes o ND 2 ug/L 5030B 07/01/2 1:207378 8260B 07/01/21:210107 ND=Non-Detected.PQL=Practical Quantitation Limit.$Surrogate.*PQL adjusted for dilution. Page 11 of 17 .O "AGRICULTURAL Analytical Chemists July 29, 2021 Lab ID : SP 2108497 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Cone. QC Data DQO Note Organic 1,1,1,2-Tetrachloroethane 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank a /L ND <0.5 1,1,1-Trichloroethane(TCA) 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 1,1,2,2-Tetrachloroethane 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 1,1,2-Trichloroethane 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank I u /L ND <0.5 1,1-Dichloroethane 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 1,1-Dichloroethylene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 LCS ug/L 25.00 102% 52-137 MS ug/L 25.00 131% 25-179 (SP 2108497-001) MSD ug/L 25.00 125% 25-179 MSRPD u /L 0.000 4.6% 1 <26 1,1-Dichloropropee 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank a /L ND <0.5 1,2,3-Trichlorobenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 250 Blank u /L ND <10 1,2,4-Trichlorobenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 250 Blank u /L ND <10 1,2,4-Trimethylbenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 1,2-Dichlorobenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 1,2-Dichloroethane(EDC) 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 1,2-Dichloroethane-d4 5030B 07/01/21:207378VRG ExBlk ug/L 0.0% N/A Blank ug/L 25.00 103% 70-129 LCS ug/L 25.00 108% 70-129 MS ug/L 25.00 108% 70-129 (SP 2108497-001) MSD ug/L 25.00 108% 70-129 MSRPD u /L 0.000 0.5% 1 520.0 1,2-Dichloropropane 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 1,3,5-Trimethylbenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 1,3-Dichlorobenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 1,3-Dichloropropane 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 1,4-Dichlorobenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 2-Dichloropropane 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 Butanone(MEK) 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 250 Blank u /L ND <10 Chlorotoluene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 Hexanone 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 250 Blank u /L ND <10 Bromofluorobenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.0% N/A Blank ug/L 25.00 103% 81-112 LCS u /L 25.00 1 105% 81-112 Page 12 of 17 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 July 29, 2021 Lab ID : SP 2108497 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Cone. QC Data DQO Note Organic 4-Bromofluorobenzene 5030B MS ug/L 25.00 105% 0-200 (SP 2108497-001) MSD ug/L 25.00 105% 0-200 MSRPD a /L 0.000 0.3% <20.0 Chlorotoluene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank a /L ND <0.5 Methyl-2-pentanone(MIBK) 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 250 Blank u /L ND <10 Acetone 5030B 07/01/21:207378VRG ExBlk ug/L 332.6 1250 Blank ug/L ND <50 crolein 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 1250 Blank ug/L ND 1 <50 Acrylonitrile 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 1250 Blank u /L ND <50 Benzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 LCS ug/L 25.00 103% 60-134 MS ug/L 25.00 120% 47-169 (SP 2108497-001) MSD ug/L 25.00 117% 47-169 MSRPD ug/L 0.000 3.0% <24 romobenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 romochloromethane 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 romodichloromethane 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 romoform 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 50 Blank u /L ND <2 romomethane(Methyl Bromide) 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 Carbon Disulfide 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 250 Blank ug/L ND <10 Carbon Tetrachloride 5030B 07/01/21:207378VRG ExBlk ug/L 0.00 25 Blank u /L ND <1 Chlorobenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 LCS ug/L 25.00 90.7% 56-152 MS ug/L 25.00 102% 31-212 (SP 2108497-001) MSD ug/L 25.00 98.5% 31-212 MSRPD u /L 0.000 1 3.6% <27 Chloroethane(Ethyl Chloride) 5030B 07/01/21:207378VRG ExBlk ug/L 0.00 25 Blank u /L ND <1 Chloroform 5030B 07/01/21:207378VRG ExBlk ug/L 0.00 25 Blank u /L ND <1 Chloromethane(Methyl Chloride) 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 cis-1,2-Dichloroethylene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank I ug/L ND <0.5 cis-1,3-Dichloropropene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 ibromochloromethane 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 50 Blank u /L ND <2 ibromofluromethane 5030B 07/01/21:207378VRG ExBlk ug/L 0.0% N/A Blank ug/L 25.00 109% 67-133 LCS ug/L 1 25.00 1 108% 67-133 Page 13 of 17 July 29, 2021 Lab ID : SP 2108497 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Conc. QC Data DQO Note Organic Dibromofluromethane 5030B MS ug/L 25.00 108% 67-133 (SP 2108497-001) MSD ug/L 25.00 109% 67-133 MSRPD ug/L 0.000 0.4% <20.0 Dibromomethane 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 Dichlorodifluoromethane 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND 1 <0.5 ichloromethane 5030B 07/01/21:207378VRG ExBlk ug/L 27.26 125 Blank ug/L ND <5 Ethyl tert-Butyl Ether 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 50 Blank ug/L ND <2 thylbenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u ND <0.5 reon-II 5030B 07/01/21:207378VRG ExBlk ug/L 0.00 25 Blank ug/L ND <1 exachlorobutadiene 5030B 07/01/21:207378VRG ExBlk ug/L 0.00 125 Blank ug/L ND <5 Isopropyl Ether 5030B 07/01/21:207378VRG ExBlk ug/L 0.00 125 Blank ug/L ND <5 sopropylbenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 Methyl tert-Butyl Ether(MTBE) 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 50 Blank ug/L ND <2 Naphthalene 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 250 Blank ug/L ND <10 Butylbenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 Propylbenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 Isopropyltoluene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 sec-Butylbenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 Styrene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u ND <0.5 TAME 5030B 07/01/21:207378VRG ExBlk ug/L 0.00 125 Blank ug/L ND <5 ert-Butanol 5030B 07/01/21:207378VRG ExBlk ug/L 0.00 125 Blank ug/L ND <5 ert-Butylbenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 etrachloroethylene(PCE) 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 Toluene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 LCS ug/L 25.00 112% 56-131 MS ug/L 25.00 131% 44-164 (SP 2108497-001) MSD ug/L 25.00 122% 44-164 MSRPD a 0.000 6.4% 1 <30 Toluene-d8 5030B 07/01/21:207378VRG ExBlk ug/L 0.0% N/A Blank ug/L 25.00 108% 71-119 LCS ug/L 25.00 114% 71-119 MS ug/L 25.00 112% 71-119 (SP 2108497-001) MSD ug/L 25.00 111% 71-119 Page 14 of 17 July 29, 2021 Lab ID : SP 2108497 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Cone. QC Data DQO Note Organic Toluene-d8 5030B 07/01/21:207378VRG MSRPD ug/L 0.000 1.2% <20 trans-1,2-Dichloroethylene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 ans-1,3-Dichloropropene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 richloroethylene(TCE) 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 LCS ug/L 25.00 105% 61-123 MS ug/L 25.00 123% 41-167 (SP 2108497-001) MSD ug/L 25.00 117% 41-167 MSRPD u /L 0.000 4.9% 1 <32 Vinyl Acetate 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 250 Blank a /L ND <10 Vinyl Chloride 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 ylenes m,p 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 50 Blank u /L ND <2 ylenes o 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 50 Blank ug/L ND <2 1,1,1,2-Tetrachloroethane 8260B 07/01/21:210107VRG CCV u /L 25.00 81.0% 70-130 1,1,1-Trichloroethane(TCA) 8260B 07/01/21:210107VRG CCV ug/L 25.00 115% 70-130 1,1,2,2-Tetrachloroethane 8260B 07/01/21:210107VRG CCV u /L 25.00 82.0% 70-130 1,1,2-Trichloroethane 8260B 07/01/21:210107VRG CCV ug/L 25.00 100% 70-130 1,1-Dichloroethane 8260B 07/01/21:210107VRG CCV u /L 25.00 121% 70-130 1,1-Dichloroethylene 8260B 07/01/21:210107VRG CCV ug/L 25.00 97.8% 80-120 1,1-Dichloro ro ene 8260B 07/01/21:210107VRG CCV I u /L 25.00 92.0% 70-130 1,2,3-Trichlorobenzene 8260B 07/01/21:210107VRG CCV ug/L 25.00 29.8% 70-130 380 1,2,4-Trichlorobenzene 8260B 07/01/21:210107VRG CCV u /L 25.00 62.2% 70-130 380 1,2,4-Trimethylbenzene 8260B 07/01/21:210107VRG CCV ug/L 25.00 113% 70-130 1,2-Dichlorobenzene 8260B 07/01/21:210107VRG CCV u /L 25.00 95.1% 70-130 1,2-Dichloroethane(EDC) 8260B 07/01/21:210107VRG CCV ug/L 25.00 103% 70-130 1,2-Dichloroethane-d4 8260B 07/01/21:210107VRG CCV u /L 25.00 103% 70-130 1,2-Dichloropropane 8260B 07/01/21:210107VRG CCV ug/L 25.00 96.5% 80-120 1,3,5-Trimeth lbenzene 8260B 07/01/21:210107VRG CCV u /L 25.00 107% 70-130 1,3-Dichlorobenzene 8260B 07/01/21:210107VRG CCV ug/L 25.00 93.3% 70-130 1,3-Dichloro ro ane 8260B 07/01/21:210107VRG CCV u /L 25.00 79.9% 70-130 1,4-Dichlorobenzene 8260B 07/01/21:210107VRG CCV ug/L 25.00 83.1% 70-130 2-Dichloro ro ane 8260B 07/01/21:210107VRG CCV u /L 25.00 196% 70-130 360 Butanone(MEK) 8260B 07/01/21:210107VRG CCV ug/L 80.00 146% 50-150 Chlorotoluene 8260B 07/01/21:210107VRG CCV u /L 25.00 102% 70-130 Hexanone 8260B 07/01/21:210107VRG CCV ug/L 80.00 200% 50-150 360 Bromofluorobenzene(BFB) 8260B 07/01/21:210107VRG CCV u /L 25.00 109% 70-130 Chlorotoluene 8260B 07/01/21:210107VRG CCV ug/L 25.00 89.9% 70-130 Meth 1-2- entanone(M113K) 8260B 07/01/21:210107VRG CCV u /L 80.00 189% 50-150 360 Acetone 8260B 07/01/21:210107VRG CCV ug/L 80.00 143% 50-150 crolein 8260B 07/01/21:210107VRG CCV u /L 20.00 863% 50-150 360 crylonitrile 8260B 07/01/21:210107VRG CCV ug/L 20.00 1580% 50-150 360 Benzene 8260B 07/01/21:210107VRG CCV u /L 25.00 94.4% 70-130 romobenzene 8260B 07/01/21:210107VRG CCV ug/L 25.00 83.8% 70-130 romochloromethane 8260B 07/01/21:210107VRG CCV u /L 25.00 103% 70-130 romodichloromethane I 8260B 07/01/21:210107VRG CCV I ug/L 25.00 95.8% 70-130 romoform I 8260B 07/01/21:210107VRG CCV I u /L 25.00 75.4% 70-130 romomethane(Methyl Bromide) I 8260B 07/01/21:210107VRG CCV I ug/L 25.00 89.3% 70-130 Page 15 of 17 July 29, 2021 Lab ID : SP 2108497 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Cone. QC Data DQO Note Organic Carbon Disulfide 8260B 07/01/21:210107VRG CCV ug/L 80.00 126% 50-150 Carbon Tetrachloride 8260B 07/01/21:210107VRG CCV a 25.00 90.0% 70-130 Chlorobenzene 8260B 07/01/21:210107VRG CCV I ug/L 25.00 85.0% 70-130 Chloroethane(Ethyl Chloride) 8260B 07/01/21:210107VRG CCV a 25.00 84.8% 70-130 Chloroform 8260B 07/01/21:210107VRG CCV ug/L 25.00 104% 80-120 Chloromethane(Meth 1 Chloride) 8260B 07/01/21:210107VRG CCV u 25.00 149% 70-130 360 cis-1,2-Dichloroethylene 8260B 07/01/21:210107VRG CCV ug/L 25.00 112% 70-130 cis-1,3-Dichloro ro ene 8260B 07/01/21:210107VRG CCV a 25.00 107% 70-130 ibromochloromethane 8260B 07/01/21:210107VRG CCV ug/L 25.00 76.0% 70-130 ibromofluromethane 8260B 07/01/21:210107VRG CCV a 25.00 107% 70-130 ibromomethane 8260B 07/01/21:210107VRG CCV ug/L 25.00 97.0% 70-130 ichlorodifluoromethane 8260B 07/01/21:210107VRG CCV u 25.00 116% 70-130 ichloromethane 8260B 07/01/21:210107VRG CCV ug/L 25.00 97.8% 70-130 Ethyl tert-Butyl Ether 8260B 07/01/21:210107VRG CCV a 25.00 159% 50-150 360 thylbenzene 8260B 07/01/21:210107VRG CCV ug/L 25.00 84.2% 80-120 exachlorobutadiene 8260B 07/01/21:210107VRG CCV a 25.00 82.6% 70-130 Isopropyl Ether 8260B 07/01/21:210107VRG CCV I ug/L 25.00 168% 50-150 360 Isooropylbenzene 8260B 07/01/21:210107VRG CCV u 25.00 101% 70-130 Methyl tert-Butyl Ether 8260B 07/01/21:210107VRG CCV ug/L 25.00 154% 70-130 360 Naphthalene 8260B 07/01/21:210107VRG CCV a 25.00 1 43.2% 70-130 380 Butylbenzene 8260B 07/01/21:210107VRG CCV ug/L 25.00 118% 70-130 n-Propylbenzene 8260B 07/01/21:210107VRG CCV a 25.00 102% 70-130 Isopropyltoluene 8260B 07/01/21:210107VRG CCV ug/L 25.00 115% 70-130 sec-Butylbenzene 8260B 07/01/21:210107VRG CCV u 25.00 107% 70-130 Styrene 8260B 07/01/21:210107VRG CCV ug/L 25.00 84.9% 70-130 TAME 8260B 07/01/21:210107VRG CCV a 25.00 159% 50-150 360 ert-Butanol 8260B 07/01/21:210107VRG CCV ug/L 125.0 122% 50-150 ert-But lbenzene 8260B 07/01/21:210107VRG CCV a 25.00 116% 70-130 etrachloroethylene(PCE) 8260B 07/01/21:210107VRG CCV ug/L 25.00 70.2% 70-130 Toluene 8260B 07/01/21:210107VRG CCV u 25.00 105% 80-120 Toluene-d8 8260B 07/01/21:210107VRG CCV ug/L 25.00 116% 70-130 trans-1,2-Dichloroeth lene 8260B 07/01/21:210107VRG CCV u 25.00 101% 70-130 ans-1,3-Dichloropropene 8260B 07/01/21:210107VRG CCV ug/L 25.00 109% 70-130 richloroeth lene(TCE) 8260B 07/01/21:210107VRG CCV a 25.00 92.2% 70-130 richlorofluoromethane F-11 8260B 07/01/21:210107VRG CCV a 25.00 81.6% 70-130 Vinyl Acetate 8260B 07/01/21:210107VRG CCV ug/L 80.00 148% 50-150 Vinyl Chloride 8260B 07/01/21:210107VRG CCV a 25.00 104% 80-120 ylene m,p 8260B 07/01/21:210107VRG CCV ug/L 50.00 86.3% 70-130 [Xylenes o 8260B 07/01/21:210107VRG I CCV I a 25.00 1 92.8% 1 70-130 Definition CCV :Continuing Calibration Verification-Analyzed to verify the instrument calibration is within criteria. Blank :Method Blank-Prepared to verify that the preparation process is not contributing contamination to the samples. EXBlk :TCLP/STLC Extraction Blank-Prepared to verify that the preparation process is not contributing contamination to the samples. LCS :Laboratory Control Standard/Sample-Prepared to verify that the preparation process is not affecting analyte recovery. MS Matrix Spikes-A random sample is spiked with a known amount of analyte.The recoveries are an indication of how that sample matrix affects analyte recovery. MSD :Matrix Spike Duplicate of MS/MSD pair-A random sample duplicate is spiked with a known amount of analyte.The recoveries are an indication of how that sample matrix affects analyte recovery. MSRPD :MS/MSD Relative Percent Difference(RPD)-The MS relative percent difference is an indication of precision for the preparation and analysis. ND :Non-detect-Result was below the DQO listed for the analyte. DQO :Data Quality Objective-This is the criteria against which the quality control data is compared. Explanation 360 :CCV above Acceptance Range(AR).Samples which were non detect for this analyte were accepted. Page 16 of 17 July 29, 2021 Lab ID : SP 2108497 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Explanation 380 :CCV met CCC and SPCC criteria,Results were reported. Page 17 of 17 yy r�J IF IL ENVIRONMENTAL 7-- iAIJINICULTURAL www.fglinc.com CHAIN OF CUSTODY Page 1 of 1 AND ANAL YSES REQUEST FORM Chain of Custady Information Sample Type lnformatton Test Descriptlon(s) Lab Number: SP 2108497 2011369 Client: South Tahoe Public Utility District 3 Address: 1275 Meadow Crest Drive y South Lake Tahoe,CA 96150 3 c� Cn a Phone:(530)543-6231 Fax:(530)5414296 Contact: Dan Arce Project: AG78156,AG78155,AG78157 (1) `CAI Purchase Order: a z o Sampler(s): Arce/Chernago/Uribe a o is o p �. m 4 � O a 0 o o a o x Compositor Setup Date: Time: n4.4 N 0 0 ao N�nmp Iacat1=DesaW1= Data d 451me ! a° as as ooG W ampM. 1 DD-01 Diamond Ditch@Beginning 06/23/2021 10:13 G WW 2 WW-05 Final Grab 06/23/2021 10:46 G WW 3 HPR Harvey Place Reservoir 06/23/2021 13:32 G WW Remarks Relinquished Date Time Relinquished Date Time Relinquished Date Time Report MTBE to 0.2 ug/L Federal Express 6/25/21-Combined the COCs SP2108461, SP2108464 Received By: Date Time Received By: Date Time Received By: Date Time and SP2108466 per customer request. Shawn Peck 06/24/2021 11:50 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Offioo&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Undo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 CHAIN OF CUSTODY 7275Meadow oe Public Utility District Lab Sent FGL Preservatives: Turn-Around-Time: Crest Drive , •- VOC-HCI Standard e Tahoe,CA 96150 - Sampler(s): D.Arce Phone:(530)-543-6231 +'••�.,,,,•+��`', B.Chernago K. Uribe co N d {L 1 Collection ;, Lab ID# Sample Site Date&Time o AG78166 DD-01 Diamond Ditch @ Beginning Start of Diamond Ditch;at HPR 06/23/2021 10:13 WIN x outlet Notes: Relinquished by: Received by: Report MTBE to 0.2 ug/L Analyze Travel and Field Blanks only if VOCs detected in samples. Signature Signature Use Calif State WriteOn to report&upload results of Potable Water Wells. Print <.ZV,%n V•'Ob-c Print Company South Tahoe Public Utility District Company Please Return all STPUD ice chests & Blue Ice Date: d(f--Z3.2/ Time: 110J Date: Time: Comments: Relinquished by: Receive Signature Signature Print Print Company Company Date: Time: Date: Time: 1 1 �� Page 1 of 1 CHAIN OF CUSTODY )04�-44 F1275 oe Public Utility District Lab Sent FGL Preservatives: Turn-Around-Time: dow Crest Drive Sam ler s Cherna O4CStandard e Tahoe,CA 96150 p ( � B• 9 VOC -HCI 30)-543-6231 „DI 0 co lV Q W a J Collection Lab ID# Sample Site p Date&Time o AG78155 WW-05 Final Grab 06/23/2021 13:32 WW FNotes: Relinquished by: Received by: MTBE to 0.2 ug/L e Travel and Field Blanks only if VOCs detected in samples. Signature 0;'� 'z9 t w Signature Use Calif State WriteOn to report&upload results of Potable Water Wells. Print Print Company South Tahoe Public Utility District Company Please Return all STPUD ice chests & Blue Ice Date: ol_a•z 3-z-, Time: /10) Date: Time: Comments: Relinquished by: Receive Signature Signature Print Print Company Compan Date: Time: Date: Time. rC Page 1 of 1 CHAIN OF CUSTODY F1275Meadow oe Public Utility District o Lab Sent FGL. Preservatives: urn-Around-Time_ Crest Drive ASampler(s): p, VOC-HCI Standard e Tahoe,CA 96150 Arce30}-543-6231 •�•its •w•'• B.Chernago K. Uribe co !V co a w a Collection Lab ID# Sample Site p Date&Time o AG78157 HPR Harvey Place Reservoir 06/2312021 10:46 ww x 6 V)C'1/S Notes: Relinquished by: Received by: Report MTBE to 0.2 ug/L _Analyze Travel and Field Blanks only if VOCs detected in samples. Signature olL -- � � Signature Use Calif State WriteOn to report&upload results of Potable Water Wells. Print v� (A';'k-e Print Company South Tahoe Public Utility District Company Please Return all STPUD ice chests & Blue Ice Date: �-Z3•Z1 Time: No Date: Time: Comments: Relinquished by: ReceivedAQ"'-)� Signature Signature Print A k JA Print Company Company Date: Time: Date: V Time: UL Page 1 of 1 Fwd:Fwd:Recently Sent Samples South Tahoe PUD FGL Acc... Subject: Fwd: Fwd: Recently Seat Samples Soutk Tahoe PUD FGL Acct #z01136q From: David Terz <davidt@Fgl inc.com> Date: 6/2-4/2-02-21 5:2-7 PM To: Login Santa Paula <loginSp@Fgl iKC.com> CC: Vickie Taylor <vickiet@Fglinc.com>, Crlenn Olsen <glenno@Fglinc.com> Login- Please create a new lab number combing the information for the COCs SP2108461, SP2108464 and SP2108466. Customer wants all three on on report. you'll have to pull and combine the original COCs and CURs into one file and assign to the new COC. Under login remarks, note that we combined the COCs SP2108461, SP2108464 and SP2108466 per customer request. Send me lab number when done. Vickie- Hide the posted reports. And recall the invoice. Regards, David Terz QA Director Fruit Growers Laboratory 805-392-2024 -------- Forwarded Message -------- Subject:Fwd: Recently Sent Samples South Tahoe PUD FGL Acct#2011369 Date:Th u, 24 Jun 2021 16:53:11 -0700 From:Vickie Taylor<vickiet@fglinc.com> To:David Terz <davidt@fglinc.com> Hi David, please see the request in the email below from Dan Arce at South Tahoe PUD. They left us without notice in 2019 and they have given us very little volume of work since. Currently we have one COC from Feb 2021 plus the three COCs mentioned below. Do you want to respond regarding his request to report 3 different lab numbers in one report and 1 of 2 6/25/2021,9:10 AM Fwd:Fwd:Recently Sent Samples South Tahoe PUD FGL Acc... invoice them on one invoice like as if they were all on the same COC? Sincerely, Vickie Taylor Vickie Taylor Corporate Office Manager 805-392-2010 www.fglinc.com Together we become the best version of ourselves -------- Forwarded Message-------- Subject:Recently Sent Samples Date:Th u, 24 Jun 2021 22:17:42 +0000 From:Dan Arce <darce stpud.dst.ca.us> To:Vickie Taylor vickiet@fglinc.com} <vickiet@fglinc.com> Hello Ms.Vickie Taylor We sent you three samples yesterday for Full 8260 analysis. Each sample came with its own individual Chain of Custody.The COC_IDs assigned by FGL are:SP2108461,SP2108464 and SP2108466. Please combine all three sets of results into a single Report and Invoice if possible as if all three had come with a single COC. Thank you Vickie. I hope you are having a good Summer. Dan Arce Lab Director South Tahoe Public Utility District 1275 Meadow Crest Drive South Lake Tahoe,CA 96150 Office:530.543.6231 Cell: 530.318.1477 This email message has been delivered safely and archived online by Mimecast. 2 of 2 6/25/2021,9:10 AM FGL Environmental Doc ID: 2D0900157 SOP 17.DOC Revision Date: 10/09/14 Page: 1 of 1 Condition Upon Receipt (Attach to COC) Sample Receipt at SP: 1. Number of ice chests/packages received: 1 2• Shipper tracking numbers 774075833301 3.Were samples received in a chilled condition? Temps: 6 4.Surface water(SWTR)bact samples:A sample that has a temperature upon receipt of>10C,whether iced or not, should be flagged unless the time since sample collection has been less than two hours. 5. Do the number of bottles received agree with the Yes No N/A COC? 6.Verify sample date,time, sampler Yes No N/A 7.Were the samples received intact? (i.e. no broken Yes No bottles, leaks, etc.) 8.Were sample custody seals intact? Yes No N/A Sample Verification, Labeling and Distribution: 1.Were all requested analyses understood and Yes No acceptable? 2. Did bottle labels correspond with the client's ID's? Yes No 3.Were all bottles requiring sample preservation Yes No N/A FGL properly preserved? [Exception:Oil&Grease,VOA and CrVI verified in lab] 4.VOAs checked for Headspace? Yes No N/A 5.Were all analyses within holding times at time of Yes No receipt? 6. Have rush or project due dates been checked and Yes No N/A accepted? Include a copy of the COC for lab delivery. (Bacti. Inorganics and Radio) Sample Receipt, Login and Verification completed by: Reviewed and Digitally signed by Shawn Peck Shawn Peck Title:Sample Receiving Approved By Date:07/15/2021-09:04:14 Discrepency Documentation: Any items above which are"No"or do not meet specifications (i.e.temps)must be resolved. 1. Person Contacted: Phone Number: Initiated By: Date: Problem: Resolution: 2. Person Contacted: Phone Number: Initiated By: Date: Problem: Resolution: (2011369) South Tahoe Public Utility District SP 2108497 SRP-07/15/2021-09:04:14 TEST METHODS Laboratory Analyses The Regional Board allows the District laboratory to use an alternate test method for Total Nitrogen and Total Kjeldahl Nitrogen (TKN). The District uses test method 1-4650-03, developed by United States Geological Service (USGS), for Total Nitrogen. TKN is calculated by the subtraction of Nitrate-N and Nitrite-N from the Total Nitrogen result. The permit specifies that a performance evaluation (PE)test be done annually and the result is within an acceptable range. The report for this year's PE sample follows. Ver. 1 Page 1 of 14 OERA. A Waters Company Dan Arce South Tahoe Public Utilities District 1275 Meadow Crest Dr. South Lake Tahoe, CA 96150 USA WP-313 Final Report TM 14 !! r, F�' WatR TM Pollution Proficiency Testing WatRTM Pollution Study Open Date: 02/15/21 Close Date: 04/01/21 Report Issued Date: 04/05/21 Study#:WP-313 Ver. 1 Page 2 of 14 QFRA. A Waters Company April 5, 2021 Dan Arce South Tahoe Public Utilities District 1275 Meadow Crest Dr. South Lake Tahoe, CA 96150 Enclosed is your final report for ERA's WP-313 WatR TM Pollution Proficiency Testing (PT) study. Your final report includes an evaluation of all results submitted by your laboratory to ERA. Data Evaluation Protocols: All analytes in ERA's WP-313 WatRTM Pollution Proficiency Testing study have been evaluated using the following tiered approach. If the analyte is listed in the most current TNI Fields of Proficiency Testing (FoPT)table the evaluation was completed by comparing the reported result to the acceptance limits generated using the criteria contained in the table and the evaluation criteria contained in the 2016 TNI Standard, Volume 3. If the analyte is not included in the TNI FoPT table, the reported result has been evaluated using the procedures outlined in ERA's Standard Operating Procedure for the Generation of Performance Acceptance Limits (SOP 730002268). Corrective Action Help: As part of your accreditation(s), you may be required to identify the root cause of any"Not Acceptable" results, implement the necessary corrective actions, and then satisfy your PT requirements by participating in a Supplemental (QuiKTmResponse) or future ERA PT study. ERA's technical staff is available to help your laboratory resolve any technical issues that may be impairing your PT performance and possibly affecting your routine data quality. Our laboratory and technical staff have many years of collective experience in performing the full range of environmental analyses. As part of our technical support, ERA offers QC samples that can be useful in helping you work through your technical issues. Thank you for your participation in ERA's WP-313 WatRTM Pollution Proficiency Testing study. If you have any questions, please contact our Proficiency Testing Department at 1-800-372-0122. Sincerely, Matthew Seebeck Quality Officer attachments 16341 Table Mountain Pkwy•Golden,CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eragc.com Study#:WP-313 Ver. 1 Page 3 of 14 QFRA. A Waters Company Report Recipient Contact/Phone Number Reporting Type California ELAP Christine Sotelo/916-341-5175 All Analytes Study#:WP-313 Ver. 1 OFAA Page 4 of 14 A Waters Company WP-313 Definitions & Study Discussion Study Dates: 02/15/21 -04/01/21 Report Issued: 04/05/21 WP Study Definitions WP Study Discussion The Reported Value is the value that the laboratory reported ERA's WP-313 WatRTMPollution Proficiency Testing study to ERA. has been reviewed by ERA senior management and certified compliant with the requirements of the 2016 TNI Standard The ERA Assigned Values are compliant with the most and the criteria contained in the most current TNI Fields of current TNI Fields of Proficiency Testing (FoPT)table. A Proficiency Testing (FoPT)table. parameter not added to the standard is given an Assigned Value of I'< PTRL" per the guidelines contained in the 2016 ERA's WP-313 WatRTMPollution study standards were TNI Standard. The assigned values are directly traceable to examined for any anomalies. A full review of all homogeneity, the commercially prepared starting materials used to stability and accuracy verification data was completed. All manufacture the PT standards. analytical verification data for all analytes met the acceptance criteria contained in the 2016 TNI Standard and the criteria The Acceptance Limits are established per the criteria contained in the most current TNI FoPT table. contained in the most current TNI FoPT table or ERA's SOP for the Generation of Performance Acceptance LimitSTm as All activities associated with this proficiency testing study applicable. were performed by Waters/ERA with the exception of those noted below. The following physical samples/products were manufactured for Waters/ERA by a subcontractor: The Performance Evaluation: Microbiology products with the following catalog numbers: 880, 935, 079, 077, 080, 595, 595A, 576, 576A Acceptable = Reported Value falls within the Acceptance Limits. The data submitted by participating laboratories was also examined for study anomalies. There were no anomalies observed during the statistical review of the data. Not Acceptable = Reported Value falls outside the Acceptance Limits. ERA's WP-313 WatRTMPollution study reports shall not be reproduced except in their entirety and not without the permission of the participating laboratories. The report must No Evaluation = Reported Value cannot be evaluated. not be used by the participating laboratories to claim product endorsement by any agency of the U. S. government. The data contained herein are confidential and intended for Not Reported = No Value reported. your use only. If you have any questions or concerns regarding your The Method Description is the method the laboratory reported assessment in ERA's WatRTMPollution Proficiency Testing to ERA. program, please contact our Proficiency Testing Department at 1-800-372-0122. Study#:WP-313 ACCREDITED Ver. 1 Page 5 of 14 FjRA WP-313 Laboratory Exception Report A Waters Company Dan Arce EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District Report Issued: 04/05/21 1275 Meadow Crest Dr. Study Dates: 02/15/21 -04/01/21 South Lake Tahoe, CA 96150 (530) 543-6231 Not Acceptable Evaluations There were no Not Acceptable evaluations for this study. All analytes except for 1,1-Biphenyl, 1,2-Diphenylhydrazine, 1,3-Dinitrobenzene,2,3-Dichloroaniline,Acetophenone,Atrazine,Azobenzene, Benzaldehyde, NCCREDI ED Caprolactam, n-Decane and n-Octadecane in the Base/Neutrals,catalog#833,are included in ERA's A2LA accreditation. Lab Code 1539.01. „o0 16341 Table Mountain Pkwy•Golden, CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eragc.com Study#:WP-313 Ver. 1 Page 6 of 14 A Waters Company Final Report Results For Laboratory South Tahoe Public Utilities District All analytes except for 1,1-Biphenyl, 1,2-Diphenylhydrazine, 1,3-Dinitrobenzene,2,3-Dichloroaniline,Acetophenone,Atrazine,Azobenzene, Benzaldehyde, Caprolactam,n-Decane and n-Octadecane in the Base/Neutrals,catalog#833,are included in ERA's A2LA accreditation. Lab Code 1539.01. ACCREDITED 16341 Table Mountain Pkwy•Golden, CO 80403•800.372.0122•303.431.8454•fax 303.421.0159 •www.eragc.com Study#:wP-313 Ver. 1 Page 7 of 14 A Waters Company Final Evaluation Report Study: WP-313 ERA Customer Number: S586001 Laboratory Name: South Tahoe Public Utilities District Inorganic Results All analytes except for 1,1-Biphenyl, 1,2-Diphenylhydrazine, 1,3-Dinitrobenzene,2,3-Dichloroaniline,Acetophenone,Atrazine,Azobenzene, Benzaldehyde, Caprolactam,n-Decane and n-Octadecane in the Base/Neutrals,catalog#833,are included in ERA's A2LA accreditation. Lab Code 1539.01. ACCREDITED 16341 Table Mountain Pkwy•Golden, CO 80403•800.372.0122•303.431.8454•fax 303.421.0159 •www.eragc.com Study#:wP-313 Ver. 1 Page 8 of 14 FRA WP-313 Final Evaluation Report A Waters Company Dan Arce EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District Report Issued: 04/05/21 1275 Meadow Crest Dr. Study Dates: 02/15/21 -04/01/21 South Lake Tahoe, CA 96150 (530)543-6231 TNI Reported Assigned Acceptance Performance Analysis Study Study Analyte Analyte Units Value Value Limits Evaluation Method Description Date Z Score Mean Standard Analyst Name Code Deviation WP Minerals(cat#581,lot#P313-506) 1505 Alkalinity as CaCO3 mg/L 40.8 40.6 34.5-46.7 Acceptable SM 2320 B-1997 1997 3/2/2021 -0.0307 40.9 1.81 Kevin Uribe 1575 Chloride mg/L 118 114 100-128 Acceptable EPA 300.02A 1993 3/11/2021 0.487 116 4.59 Sierra Mors 1610 Conductivity at 25°C pmhos/cm 532 538 484-592 Acceptable SM 2510 B-1997 1997 3/2/2021 -0.279 535 11.3 Kevin Uribe 1730 Fluoride mg/L 2.02 2.02 1.61 -2.36 Acceptable EPA 300.0 2.1 1993 3/2/2021 -0.200 2.05 0.158 Brian Chernago 1125 Potassium mg/L 21.9 17.5-26.3 Not Reported 22.3 1.02 1155 Sodium mg/L 91.5 73.2-110 Not Reported 93.6 4.94 2000 Sulfate mg/L 22.9 21.8 17.2-25.4 Acceptable EPA 300.0 2.1 1993 3/2/2021 0.643 22.2 1.01 Brian Chernago 1955 Total Dissolved Solids at 180°C mg/L 316 325 280-370 Acceptable SM 2540 C-2011 2011 3/2/2021 -0.0733 318 26.2 Kevin Uribe 1950 Total Solids at 105°C mg/L 322 277-367 Not Reported 331 24.3 WP Hardness(cat#580,lot#P313-507) 1960 Total Suspended Solids mg/L 69.6 56.1-78.1 Not Reported 67.6 2.84 1035 Calcium mg/L 75.5 73.0 62.0-84.0 Acceptable SM 3500-Ca B-20112011 3/15/2021 -0.183 75.9 2.21 Kevin Uribe 1085 Magnesium mg/L 27.3 23.2-31.4 Not Reported 28.0 1.58 1550 Calcium Hardness as CaCO3 mg/L 188 182 155-209 Acceptable SM 3500-Ca B-2011 2011 3/14/2021 -0.290 190 8.39 Kevin Uribe 1755 Total Hardness as CaCO3 mg/L 308 295 251-339 Acceptable SM 2340 C-2011 2011 3/14/2021 0.0577 307 15.2 Kevin Uribe WP pH(cat#577,lot#P313-977) 1900 pH S.U. 6.41 6.37 6.17-6.57 Acceptable SM 4500-H+B-2011 2011 3/2/2021 0.468 1 6.39 0.0427 Kevin Uribe WP Settleable Solids(cat#883,lot#P313-911) 1965 Settleable Solids mL/L 12 12.0 9.00-16.0 Acceptable SM 2540 F-2011 2011 3/1/2021 1 -0.596 1 12.7 1.17 Kevin Uribe All analytes except for 1,1-Biphenyl, 1,2-Diphenylhydrazine, 1,3-Dinitrobenzene,2,3-Dichloroaniline,Acetophenone,Atrazine,Azobenzene, Benzaldehyde, Caprolactam,n-Decane and n-Octadecane in the Base/Neutrals,catalog#833,are included in ERA's A21-A accreditation. Lab Code 1539.01. ACCREDITED 16341 Table Mountain Pkwy•Golden, CO 80403•800.372.0122•303.431.8454•fax 303.421.0159 •www.eragc.com Study#:WP-313 Ver. 1 Page 9 of 14 FRA WP-313 Final Evaluation Report A Waters Company Dan Arce EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District Report Issued: 04/05/21 1275 Meadow Crest Dr. Study Dates: 02/15/21 -04/01/21 South Lake Tahoe, CA 96150 (530)543-6231 TNI Reported Assigned Acceptance Performance Analysis Study Study Analyte Analyte Units Value Value Limits Evaluation Method Description Date Z Score Mean Standard Analyst Name Code Deviation IMP Solids Concentrate(cat#4030,lot#P313-4032) 1960 Total Suspended Solids mg/L 76.4 79.7 65.0-88.8 Acceptable SM 2540 D-2011 2011 3/2/2021 -0.386 77.4 2.56 Kevin Uribe 1955 Total Dissolved Solids at 180°C mg/L 678 681 613-749 Acceptable SM 2540 c-2011 2011 3/2/2021 0.186 673 27.0 Kevin Uribe 1950 Total Solids at 105°C mg/L 762 686-838 Not Reported 756 17.6 IMP Simple Nutrients(cat#584,lot#P313-505) 1515 Ammonia as N mg/L 10.1 10.8 8.61-12.9 Acceptable EPA 350.1 2 1993 3/6/2021 -1.15 10.8 0.643 Delores Trebotich 1820 Nitrate+Nitrite as N mg/L 19.8 18.2 15.2-21.0 Acceptable EPA 300.0 2.1 1993 3/5/2021 1.48 18.2 1.08 Sierra Mors 1810 Nitrate as N mg/L 19.8 18.2 15.2-21.1 Acceptable EPA 300.0 2.1 1993 3/5/2021 1.42 18.4 0.993 Sierra Mors 1870 ortho-Phosphate as P mg/L 4.82 4.25 3.61-4.89 Acceptable EPA 300.0 2.1 1993 3/5/2021 3.04 4.28 0.178 Sierra Mors IMP Simple Nutrients(cat#584,lot#P313-505) 1515 Ammonia as N mg/L 10.8 8.61-12.9 Not Reported 10.8 0.643 1820 Nitrate+Nitrite as N mg/L 17.6 18.2 15.2-21.0 Acceptable SM4500-No3 F-2011 2011 3/11/2021 -0.549 18.2 1.08 Delores Trebotich 1810 Nitrate as N mg/L 17.6 18.2 15.2-21.1 Acceptable SM 4500-NO3 F-2011 2011 3/11/2021 -0.800 18.4 0.993 Delores Trebotich 1870 ortho-Phosphate as P mg/L 4.27 4.25 3.61-4.89 Acceptable SM 4500-P E-2011 2011 3/5/2021 -0.0465 4.28 0.178 Delores Trebotich IMP Complex Nutrients(cat#579,lot#P313-525) 1795 Total Kjeldahl Nitrogen mg/L 29.6 1 31.7 1 23.9-38.0 Acceptable EPA 351.2 2 1993 3/17/2021 1 -0.473 1 30.6 1 2.12 1 Brian Chernago 1910 Total phosphorus as P mg/L 2.58 2.77 2.26-3.26 Acceptable SM 45110-P E-2011 2011 3/9/2021 -0.887 2.74 0.182 Kevin Uribe WP Complex Nutrients(cat#579,lot#P313-525) 1795 Total Kjeldahl Nitrogen mg/L 29.0 31.7 23.9-38.0 Acceptable USGS 03-4174 3/17/2021 -0.756 30.6 2.12 Brian Chernago 1910 Total phosphorus as P mg/L 2.77 2.26-3.26 Not Reported 2.74 0.182 All analytes except for 1,1-Biphenyl, 1,2-Diphenylhydrazine, 1,3-Dinitrobenzene,2,3-Dichloroaniline,Acetophenone,Atrazine,Azobenzene, Benzaldehyde, Caprolactam,n-Decane and n-Octadecane in the Base/Neutrals,catalog#833,are included in ERA's A2LA accreditation. Lab Code 1539.01. ACCREDITED 16341 Table Mountain Pkwy•Golden, CO 80403•800.372.0122•303.431.8454•fax 303.421.0159 •www.eragc.com Study#:WP-313 Ver. 1 Page 10 of 14 FRA WP-313 Final Evaluation Report A Waters Company Dan Arce EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District Report Issued: 04/05/21 1275 Meadow Crest Dr. Study Dates: 02/15/21 -04/01/21 South Lake Tahoe, CA 96150 (530)543-6231 TNI Reported Assigned Acceptance Performance Analysis Study Study Analyte Analyte Units Value Value Limits Evaluation Method Description Date Z Score Mean Standard Analyst Name Code Deviation WP Nitrite(cat#888,lot#P313-770) 1840 Nitrite as N mg/L 1.45 1 1.35 1 1.12-1.58 1 Acceptable I SM 4500-NO2 B-2011 2011 1 3/5/2021 1 1.39 1 1.36 1 0.0653 1 Sierra Mors WP Nitrite(cat#888,lot#P313-770) 1840 Nitrite as N mg/L 1.45 1.35 1.12-1.58 Acceptable EPA 300.0 2.1 1993 3/5/2021 1.39 1.36 0.0653 Sierra Mors WP Nitrite(cat#888,lot#P313-770) 1840 Nitrite as N mg/L 1.35 1 1.35 1 1.12-1.58 1 Acceptable SM 4500-NO3 F-2011 2011 3/6/2021 -0.137 1.36 0.0653 Delores Trebotich WP Demand(cat#578,lot#P313-516) 1530 BOD mg/L 95.8 94.3 50.5-138 Acceptable SM 5210 B-20112011 3/7/2021 0.167 93.0 16.5 Kevin Uribe 1555 CBOD mg/L 85.4 39.5-131 Not Reported 88.3 17.9 1565 COD mg/L 153 121-179 Not Reported 151 6.53 2040 TOC mg/L 60.4 50.5-69.8 Not Reported 61.8 5.01 WP Turbidity(cat#893,lot#P313-777) 2055 Turbidity NTU 19 1 19.9 1 16.6-23.3 1 Acceptable EPA 180.1 2 1993 3/2/2021 -0.319 19.4 1.29 Kevin Uribe WP Total Residual Chlorine(cat#587,lot#P313-501) 1945 Free Residual Chlorine mg/L 1.80 1.92 1.42-2.25 Acceptable SM 4500-CI D-2011 2011 3/1/2021 1 0.00719 1.80 0.0749 Kevin Uribe 1940 Total Residual Chlorine mg/L 1.82 1.94 1.43-2.27 Acceptable SM 4500-CI D-2011 2011 3/1/2021 -0.477 1.87 0.109 Kevin Uribe WP Total Residual Chlorine(cat#587,lot#P313-501) 1945 Free Residual Chlorine mg/L 1.77 1.92 1.42-2.25 Acceptable SM4500-CI0-2011 21111 3/1/2021 -0.394 1.80 0.0749 Kevin Uribe 1940 Total Residual Chlorine mg/L 1.82 1.94 1.43-2.27 Acceptable sM4500-C1 o-2011 2011 3/1/2021 -0.477 1.87 0.109 Kevin Uribe All analytes except for 1,1-Biphenyl, 1,2-Diphenylhydrazine, 1,3-Dinitrobenzene,2,3-Dichloroaniline,Acetophenone,Atrazine,Azobenzene, Benzaldehyde, Caprolactam,n-Decane and n-Octadecane in the Base/Neutrals,catalog#833,are included in ERA's A2LA accreditation. Lab Code 1539.01. ACCREDITED 16341 Table Mountain Pkwy•Golden, CO 80403•800.372.0122•303.431.8454•fax 303.421.0159 •www.eragc.com Study#:WP-313 Ver. 1 Page 11 of 14 FRA WP-313 Final Evaluation Report A Waters Company Dan Arce EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District Report Issued: 04/05/21 1275 Meadow Crest Dr. Study Dates: 02/15/21 -04/01/21 South Lake Tahoe, CA 96150 (530)543-6231 TNI Reported Assigned Acceptance Performance Analysis Study Study Analyte Analyte Units Value Value Limits Evaluation Method Description Date Z Score Mean Standard Analyst Name Code Deviation IMP Total Residual Chlorine(cat#587,lot#P313-501) 1945 Free Residual Chlorine mg/L 1.82 1 1.92 1 1.42-2.25 Acceptable SM 4500-CI G-2011 21111 1 3/1/2021 1 0.274 1 1.80 1 0.0749 1 Kevin Uribe 1940 Total Residual Chlorine mg/L 1.84 1.94 1.43-2.27 Acceptable SM 4500-Cl G-2011 2011 3/1/2021 -0.293 1.87 0.109 Kevin Uribe IMP Total Residual Chlorine(cat#587,lot#P313-501) 1945 Free Residual Chlorine mg/L 1.79 1.92 1.42-2.25 Acceptable SM 4500-CI G-2011 2011 3/1/2021 -0.126 1.80 0.0749 Kevin Uribe 1940 Total Residual Chlorine mg/L 1.84 1.94 1.43-2.27 Acceptable SM 4500-CI G-2011 2011 3/1/2021 -0.293 1.87 0.109 Kevin Uribe All analytes except for 1,1-Biphenyl, 1,2-Diphenylhydrazine, 1,3-Dinitrobenzene,2,3-Dichloroaniline,Acetophenone,Atrazine,Azobenzene, Benzaldehyde, Caprolactam,n-Decane and n-Octadecane in the Base/Neutrals,catalog#833,are included in ERA's A2LA accreditation. Lab Code 1539.01. ACCREDITED 16341 Table Mountain Pkwy•Golden, CO 80403•800.372.0122•303.431.8454•fax 303.421.0159 •www.eragc.com Study#:WP-313 Ver. 1 Page 12 of 14 A Waters Company Final Evaluation Report Study: WP-313 ERA Customer Number: S586001 Laboratory Name: South Tahoe Public Utilities District Microbiology All analytes except for 1,1-Biphenyl, 1,2-Diphenylhydrazine, 1,3-Dinitrobenzene,2,3-Dichloroaniline,Acetophenone,Atrazine,Azobenzene, Benzaldehyde, Caprolactam,n-Decane and n-Octadecane in the Base/Neutrals,catalog#833,are included in ERA's A2LA accreditation. Lab Code 1539.01. ACCREDITED 16341 Table Mountain Pkwy•Golden, CO 80403•800.372.0122•303.431.8454•fax 303.421.0159 •www.eragc.com Study#:wP-313 Ver. 1 Page 13 of 14 FRA WP-313 Final Evaluation Report A Waters Company Dan Arce EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District Report Issued: 04/05/21 1275 Meadow Crest Dr. Study Dates: 02/15/21 -04/01/21 South Lake Tahoe, CA 96150 (530)543-6231 TNI Reported Assigned Acceptance Performance Analysis Study Study Analyte Analyte Units Value Value Limits Evaluation Method Description Date Z Score Mean Standard Analyst Name Code Deviation WP WasteWatRM Coliform MicrobEM(cat#576,lot#P313-083) 2500 Total Coliforms(MF) CFU/100mL 1630 374-7110 Not Reported 1630 1120 2530 Fecal Coliforms(MF) CFU/100mL 913 298-2800 Not Reported 913 416 2525 E.coli(MF) CFU/100mL 972 132-7160 Not Reported 972 1170 2500 Total Coliform(MPN-Multip le Well) MPN/100mL 2420 2370 1370-4120 Acceptable SM 9223 s(cooiert ouantl- Tray)-2004 2004 2/25/2021 0.00316 2370 460 Sierra Mars 2530 Fecal Coliform(MPN-Multiple Well) MPN/100mL 1630 498-5300 Not Reported 1630 801 2525 E.coli MPN-Multi le Well MPN/100mL 2420 2220 989-4970 Acceptable SM 9223 e(coiiiert ouanti- 3/25/2021 0.0134 2220 664 Sierra Mors ( p ) p Tray)-2004 2004 All analytes except for 1,1-Biphenyl, 1,2-Diphenylhydrazine, 1,3-Dinitrobenzene,2,3-Dichloroaniline,Acetophenone,Atrazine,Azobenzene, Benzaldehyde, Caprolactam,n-Decane and n-Octadecane in the Base/Neutrals,catalog#833,are included in ERA's A2LA accreditation. Lab Code 1539.01. ACCREDITED 16341 Table Mountain Pkwy•Golden, CO 80403•800.372.0122•303.431.8454•fax 303.421.0159 •www.eragc.com Study#:WP-313 Ver. 1 Page 14 of 14 CERTIFICATE OF EXCELLENCE In recognition of the quality of your laboratory in proficiency testing for W P-313 South Tahoe Public Utilities District is issued this certificate of achievement by ERA. This laboratory has been recognized as a Laboratory of Excellence for achieving 100% acceptable data in this study which included 384 participating laboratories. This achievement is a demonstration of the superior quality of the laboratory in evaluation of the standards listed below. Complex Nutrients Demand Hardness Minerals Nitrite pH Settleable Solids Simple Nutrients Solids Concentrate Total Residual Chlorine Turbidity WasteWatRTI Coliform MicrobETM Matthew Seebeck Quality Officer S586001 Ver. 1 Page 1 of 9 QFRA. A Waters Company Dan Arce South Tahoe Public Utilities District 1275 Meadow Crest Dr. South Lake Tahoe, CA 96150 USA WP-3141! Final Report TM WatR TM Pollution Proficiency Testing WatRTM Pollution Study Open Date: 03/15/21 Close Date: 04/29/21 Report Issued Date: 05/03/21 Study#:WP-314 Ver. 1 Page 2 of 9 QFRA. A Waters Company May 3, 2021 Dan Arce South Tahoe Public Utilities District 1275 Meadow Crest Dr. South Lake Tahoe, CA 96150 Enclosed is your final report for ERA's WP-314 WatR TM Pollution Proficiency Testing (PT) study. Your final report includes an evaluation of all results submitted by your laboratory to ERA. Data Evaluation Protocols: All analytes in ERA's WP-314 WatRTM Pollution Proficiency Testing study have been evaluated using the following tiered approach. If the analyte is listed in the most current TNI Fields of Proficiency Testing (FoPT)table the evaluation was completed by comparing the reported result to the acceptance limits generated using the criteria contained in the table and the evaluation criteria contained in the 2016 TNI Standard, Volume 3. If the analyte is not included in the TNI FoPT table, the reported result has been evaluated using the procedures outlined in ERA's Standard Operating Procedure for the Generation of Performance Acceptance Limits (SOP 730002268). Corrective Action Help: As part of your accreditation(s), you may be required to identify the root cause of any"Not Acceptable" results, implement the necessary corrective actions, and then satisfy your PT requirements by participating in a Supplemental (QuiKTmResponse) or future ERA PT study. ERA's technical staff is available to help your laboratory resolve any technical issues that may be impairing your PT performance and possibly affecting your routine data quality. Our laboratory and technical staff have many years of collective experience in performing the full range of environmental analyses. As part of our technical support, ERA offers QC samples that can be useful in helping you work through your technical issues. Thank you for your participation in ERA's WP-314 WatRTM Pollution Proficiency Testing study. If you have any questions, please contact our Proficiency Testing Department at 1-800-372-0122. Sincerely, Matthew Seebeck Quality Officer attachments 16341 Table Mountain Pkwy•Golden,CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eragc.com Study#:WP-314 Ver. 1 Page 3 of 9 QFRA. A Waters Company Report Recipient Contact/Phone Number Reporting Type California ELAP Christine Sotelo/916-341-5175 All Analytes Study#:WP-314 Ver. 1 OFAA Page 4 of 9 A Waters Company WP-314 Definitions & Study Discussion Study Dates: 03/15/21 -04/29/21 Report Issued: 05/03/21 WP Study Definitions WP Study Discussion The Reported Value is the value that the laboratory reported ERA's WP-314 WatRTMPollution Proficiency Testing study to ERA. has been reviewed by ERA senior management and certified compliant with the requirements of the 2016 TNI Standard The ERA Assigned Values are compliant with the most and the criteria contained in the most current TNI Fields of current TNI Fields of Proficiency Testing (FoPT)table. A Proficiency Testing (FoPT)table. parameter not added to the standard is given an Assigned Value of I'< PTRL" per the guidelines contained in the 2016 ERA's WP-314 WatRTMPollution study standards were TNI Standard. The assigned values are directly traceable to examined for any anomalies. A full review of all homogeneity, the commercially prepared starting materials used to stability and accuracy verification data was completed. All manufacture the PT standards. analytical verification data for all analytes met the acceptance criteria contained in the 2016 TNI Standard and the criteria The Acceptance Limits are established per the criteria contained in the most current TNI FoPT table. contained in the most current TNI FoPT table or ERA's SOP for the Generation of Performance Acceptance LimitSTm as All analytes are included in ERA's A21-A accreditation, applicable. certification number 1539.01. All activities associated with this proficiency testing study The Performance Evaluation: were performed by Waters/ERA with the exception of those noted below. The following physical samples/products were manufactured for Waters/ERA by a subcontractor: Acceptable = Reported Value falls within the Acceptance Limits. Microbiology products with the following catalog numbers: 880, 935, 079, 077, 080, 595, 595A, 576, 576A Not Acceptable = Reported Value falls outside the The data submitted by participating laboratories was also Acceptance Limits. examined for study anomalies. There were no anomalies observed during the statistical review of the data. No Evaluation = Reported Value cannot be evaluated. ERA's WP-314 WatRTMPollution study reports shall not be reproduced except in their entirety and not without the permission of the participating laboratories. The report must not be used by the participating laboratories to claim product Not Reported = No Value reported. endorsement by any agency of the U. S. government. The data contained herein are confidential and intended for The Method Description is the method the laboratory reported your use only. to ERA. If you have any questions or concerns regarding your assessment in ERA's WatRTMPollution Proficiency Testing program, please contact our Proficiency Testing Department at 1-800-372-0122. Study#:WP-314 ACCREDITED Ver. 1 Page 5 of 9 FjRA WP-314 Laboratory Exception Report A Waters Company Dan Arce EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District Report Issued: 05/03/21 1275 Meadow Crest Dr. Study Dates: 03/15/21 -04/29/21 South Lake Tahoe, CA 96150 (530) 543-6231 Not Acceptable Evaluations There were no Not Acceptable evaluations for this study. All analytes except for 1,1-Biphenyl, 1,2-Diphenylhydrazine, 1,3-Dinitrobenzene,2,3-Dichloroaniline,Acetophenone,Atrazine,Azobenzene, Benzaldehyde, NCCREDI ED Caprolactam, n-Decane and n-Octadecane in the Base/Neutrals,catalog#833,are included in ERA's A2LA accreditation. Lab Code 1539.01. „o0 16341 Table Mountain Pkwy•Golden, CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eragc.com Study#:WP-314 Ver. 1 Page 6 of 9 A Waters Company Final Report Results For Laboratory South Tahoe Public Utilities District All analytes except for 1,1-Biphenyl, 1,2-Diphenylhydrazine, 1,3-Dinitrobenzene,2,3-Dichloroaniline,Acetophenone,Atrazine,Azobenzene, Benzaldehyde, Caprolactam,n-Decane and n-Octadecane in the Base/Neutrals,catalog#833,are included in ERA's A2LA accreditation. Lab Code 1539.01. ACCREDITED 16341 Table Mountain Pkwy•Golden, CO 80403•800.372.0122•303.431.8454•fax 303.421.0159 •www.eragc.com Study#:WP-314 Ver. 1 Page 7 of 9 A Waters Company Final Evaluation Report Study: WP-314 ERA Customer Number: S586001 Laboratory Name: South Tahoe Public Utilities District Inorganic Results All analytes except for 1,1-Biphenyl, 1,2-Diphenylhydrazine, 1,3-Dinitrobenzene,2,3-Dichloroaniline,Acetophenone,Atrazine,Azobenzene, Benzaldehyde, Caprolactam,n-Decane and n-Octadecane in the Base/Neutrals,catalog#833,are included in ERA's A2LA accreditation. Lab Code 1539.01. ACCREDITED 16341 Table Mountain Pkwy•Golden, CO 80403•800.372.0122•303.431.8454•fax 303.421.0159 •www.eragc.com Study#:WP-314 Ver. 1 Page 8 of 9 FRA WP-314 Final Evaluation Report A Waters Company Dan Arce EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District Report Issued: 05/03/21 1275 Meadow Crest Dr. Study Dates: 03/15/21 -04/29/21 South Lake Tahoe, CA 96150 (530)543-6231 TNI Reported Assigned Acceptance Performance Analysis Study Study Analyte Analyte Units Value Value Limits Evaluation Method Description Date Z Score Mean Standard Analyst Name Code Deviation IMP Dissolved Oxygen(cat#21Z lot#P314-213) 1880 Oxygen,Dissolved mg/L 6.70 1 6.31 1 4.42-8.20 1 Acceptable SM 4500-0 G-2.11 21111 1 3/30/2021 1 0.455 1 6.53 1 0.371 1 Kevin Uribe All analytes except for 1,1-Biphenyl, 1,2-Diphenylhydrazine, 1,3-Dinitrobenzene,2,3-Dichloroaniline,Acetophenone,Atrazine,Azobenzene, Benzaldehyde, Caprolactam,n-Decane and n-Octadecane in the Base/Neutrals,catalog#833,are included in ERA's A2LA accreditation. Lab Code 1539.01. ACCREDITED 16341 Table Mountain Pkwy•Golden, CO 80403•800.372.0122•303.431.8454•fax 303.421.0159 •www.eragc.com Study#:WP-314 Ver. 1 Page 9 of 9 CERTIFICATE OF EXCELLENCE In recognition of the quality of your laboratory in proficiency testing for W P-314 South Tahoe Public Utilities District is issued this certificate of achievement by ERA. This laboratory has been recognized as a Laboratory of Excellence for achieving 100% acceptable data in this study which included 985 participating laboratories. This achievement is a demonstration of the superior quality of the laboratory in evaluation of the standards listed below. Dissolved Oxygen Matthew Seebeck Quality Officer S586001