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2020 Annual Report STPUD ��$C 1950 W&t Vl t oTahoe f ublic Utility District 1275 Meadow Crest Drive•5outh Lake Tahoe•CA 90150-7401 Phone 530 544-6474■Fax 530 541-0614•www.stpud.ue April 12, 2020 Michael Plaziak California Regional Water Quality Control Board - Lahontan Region 2501 Lake Tahoe Boulevard South Lake Tahoe, CA 96150 Subject: 2020 Annual Report Mr. Plaziak: Enclosed is the South Tahoe Public Utility District's annual self-monitoring report for the 2020 calendar year. The District 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 2020. Trend analyses on sample sites from pre-discharge to 2020 are included. It also includes our pretreatment program update. Please give me a call if you have any questions regarding this report. Respectfully yours, C Dan Arce Laboratory Director cc: Lahontan RWQCB - RB6-1-ahontan waterhoards.ca.go_v_; Mike.Plaziak o@waterboards.ca.cl Lahontan RWQCB, Robert Tucker- RTuckerCr,D.waterboards.ca.gov Alpine County Board of Supervisors-ttremayneCcDalpinecountyca.pov Alpine County Health Department, Dr. Richard Johnson - r0ohnson =alpinecountyca.go_v_ Alpine County Health Department, Dennis Lampson dlarn sonC�alpinecou ca.gov Alpine County STPUD Contract Commission— Dr. Richard Harvey rharveyt23@gmail.com D:LAnnualReports)Lahonlan Cover Letter-2020.doc i WATER RECLAMATION PLANT ALPINE COUNTY 2020 ANNUAL REPORT SpIJTH TAF/pf pUsewar • 1950 ' Wst0` Go� e41C UTILITY D\SSA` SOUTH TAHOE PUBLIC UTILITY DISTRICT 2020 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 2020 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. 2020 Annual Report 1. Compliance Record: No violations occurred during 2020 2. Wastewater Treatment Flow Information- Permits Item Flow # a. Annual peak-day dry-weather influent flow (mgd) 4.24 b Annual peak-day wet-weather influent flow and associated storm data m d 3.99 c. Maximum month influent flow (mgd) 4.24 d. Annual average influent flow (mgd) 3.11 1. Sewer connection permits issued but not currently used, 7,400 20 (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. 229,400 Estimated remaining available wastewater treatment capacity o g' consideringthe influent flow estimated in 2f. See note) 42�° Estimated influent flow parameters listed in 2a through 2d for the coming year • Annual peak-day dry-weather influent flow (mgd) 4.75 h. • Annual peak-day wet-weather influent flow and 9.25 associated storm data (mgd) • Maximum month influent flow (mgd) 4.72 • Annual average influent flow (mgd) 3.60 Notes: Estimated remaining available wastewater treatment capacity is computed by subtracting annual peak-day dry-weather influent flow(2 a)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 2021 estimated from linear regression analysis using corresponding flows from the last ten years(2011 through 2020). O:LAnnua[Reports%Section C ❑a[a-2020 doe WASTEWATER FLOWS sass Influent Effluent Month Total Max Min Ave Total Max Min Ave Jan 98.47 3.99 2.74 3.18 107.23 4.76 2.89 3.46 Feb 92.14 3.89 2,73 3.18 98.65 4.28 2.88 3.40 Mar 92.25 3.43 2.81 2.98 102.58 4.08 2.93 3,31 Arp 87A7 3.10 2.76 2.91 96.75 3.63 2.84 3,23 May 86.02 2.97 2.64 2.77 94.91 3.60 2.81 3.06 June 98,27 3.84 2.81 3,28 106.09 4.30 2.77 3.54 July 112,78 4.24 3.37 3.64 122.97 4.73 2.83 3.97 Aug 108.68 3.91 3.07 3.51 119.01 6,46 0.00 3.84 Sep 94,82 4.01 2.80 3.16 102.37 5,70 0.00 3.41 Oct 92.96 3.47 2,67 3.00 99.88 4.90 0.05 3.22 Nov 88.54 3.46 2.63 2.95 97.57 3.71 2.76 3.25 Dec 87.69 3.44 2.51 2.83 95.80 3.70 2.40 3.09 Total 1,139.79 1,243.81 Maximum 112.78 4.24 3,64 122.97 6.46 3.97 Minimum 86.02 2.51 2.77 94.91 0.00 3.06 Average 94.98 3.11 103.65 3.40 Note: Total flows in MG; Max, Min and Ave flows in MGD. Maximum plow Report 2020 Wet Weather Maximum Influent Flow: 01/0112020 3.99 MG Dry Weather Maximum Influent Flow; 07/04/2020 4.24 MG Influent Precipitation Date Day MG Inch Type Comments Wet Weather Maximum Wet Weather Flow 01/01/2020 Wed 3.99 02/16/2020 Sun 3.89 01/02/2020 Thu 3.88 01/03/2020 Fri 3.86 01/04/2020 Sat 3.83 01/19/2020 Sun 3.72 02/15/2020 Sat 3.71 01/18/2020 Sat 3.64 02/22/2020 Sat 3.63 02/24/2020 Mon 3.56 Dry Weather Maximum Dry Weather Flow 07/04/2020 Sat 4.24 07/03/2020 Fri 4.17 09/06/2020 Sun 4.01 07/05/2020 Sun 3.99 08/08/2020 Sat 3.91 07/25/2020 Sat 3.90 08/01/2020 Sat 3.90 09/05/2020 Sat 3.89 07/18/2020 Sat 3.87 08/15/2020 Sat 3.87 D:IAn nuaI Repo rtsWax_Flow_An nual_Report-2020 PLANT LOADINGS for 2020 Change 2019 2020 % Influent Flow, MG 1,318.75 1,139.79 -13.57 CO❑(mgll) COD(Ibslyr) BOD(mg/1) 243 276 13.66 BOD(Ibslyr) 2,670,772 2,623,614 -1.77 SS(mg/1) 192 213 10.99 SS(Ibslyr) 2,110,771 2,024,746 -4.08 NH3-N (mg/1) 28.6 31.2 9.19 NH3-N (Ibslyr) 314,279 296,582 -5.63 Total P (mg/1) 5.19 5.90 13.73 Total P (Ibslyr) 57,054 56,085 -1.70 RAW INFLUENT CHARACTERISTICS for 2020 Jan Feb Mar Apr May Jun Jul Aug Sep ❑ct Nov Dec Yearly COD Max: Min: Ave: BOD Max: 368 368 295 260 266 305 332 341 308 303 345 335 368 Min: 264 252 222 200 220 215 264 260 256 246 272 229 200 Ave: 319 290 259 227 247 253 299 293 284 274 299 280 277 SS Max: 258 244 230 195 217 205 283 272 280 294 457 271 457 Min: 168 159 154 132 122 129 174 185 186 154 189 183 122 Ave: 210 204 190 161 182 174 228 231 242 228 259 237 212 NH3-N Max: 34.1 31.5 29.9 26.1 281 37.0 39.0 38.5 33.3 34.1 34.8 36A 39.0 Min: 28.4 28.9 26.2 23.9 25.8 26.3 36.4 32.6 30.1 32.2 28.8 29.0 23.9 Ave: 30.2 30.2 28.1 25.2 26.7 31.9 38.1 36.6 32.1 33.1 32.0 32.4 31.4 Total P Max: 5.58 6.86 5.78 5.23 5.50 &98 7.37 7A4 6.56 6.56 5.70 6.52 7.44 Min: 5.48 5.04 5.78 4.69 4.77 5.42 5.31 6.28 5.66 6.40 5.46 5.76 4.69 Ave: 5.53 5.84 5.78 4.88 5A4 5.99 6.33 6.68 6.25 6.48 5.58 6.14 5.89 Nate: Results expressed as mgll RAW INFLUENT ANNUAL TRENDS <---FLOW---> Total Daily COD BO❑ SS NH3-N NO3-N Total-P CI TES Year MG MG❑ mg1L mg1L mg1L mg/L mg/L mg1L 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 20A 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 5A4 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 Maximum 1,787.4 4.88 534 276 215 31.2 1.497 8.37 45.5 273 Minimum 1,110.9 3.04 344 148 117 17.4 0.027 4.28 27.6 230 Average 1,513.4 4.14 418 195 162 21.8 0.186 5.80 36.8 250 #Years 41 41 32 41 41 41 41 41 41 41 RAW INFLUENT Influent Flows Raw Influent Annual Trends Annual Trends 8 2,400 600 7 2,100 500 - 6 1,800 5 1,500 400 - m E 3 900 200 - - -- 2 600 1 300 100 ° $ - ° ° § g wily Ave MGO +Yearly Total MG T COO f—BOO T 55 Ammonia-Nitrogen Total Phosphorus Annual Trends Annual Trends 35 10 30 9 8 25 7 20 6 J J E 15 E 4 10 3 . 2 5 1 0 0 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 - - 240 500 rn c 50 200 to I J rn 400 7 2 40 160 E 30 120 300 20 eo 200 10 40 100 0 0 0 t Chlorides TDS Linear(Chlorides) Linear(TDS) Biochemical Oxygen Demand (BOD) Suspended Solids (SS) Annual Trends Annual Trends 400 300 T 350 250 300 250 200 � �t J r J E 200 — E 150 150 100 100 50 50 0 s s s a a a s T "i � � s 0 s a s s . a R R R . a s BIOCHEMICAL OXYGEN DEMAND UNIT PROCESS PERFORMANCE 2020 Removal Month _ Raw Primary Sec Final % January 319 210 21.6 9.07 97 February 296 196 36.9 19.60 93 March 259 166 22.7 7.13 97 April 227 127 21.1 9.16 96 May 247 129 17.8 6.17 98 ,tune 253 151 18.2 9.63 96 July 299 193 26,1 7.72 97 August 293 193 23.3 8.51 97 September 284 229 49.6 7.47 97 October 242 180 49,7 5.76 98 November 299 222 41.7 8.61 97 December 286 176 19.7 9.22 97 12 Month Ave 275 186 27.7 8.64 97 % Removal 34 85 69 97 Biochemical Oxygen Demand Percent Removal 100 90 0 80 E m a� 70 60 50 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Final EMuent Li nee r[Final Effluent] SUSPENDED SOLIDS UNIT PROCESS PERFORMANCE 2020 Removal Month Raw Prima Sec Final % January 210 120.4 13.8 4.01 98 February 204 126.6 26.4 12.52 94 March 190 106.3 14.3 4.73 98 April 161 80.9 11.0 2.76 98 May 182 85.8 8.8 2.12 99 June 174 89.6 11.8 4.46 97 July 228 143.0 14.4 4.23 98 August 231 138.9 18.2 5.96 97 September 242 198.1 20.2 6.72 97 October 206 97.3 12.0 2.65 99 November 259 167.3 19.4 4.23 98 December 182 94.8 14.1 3.40 98 12 Month Ave 208 120.9 15.2 4.67 98 % Removal 42 87 69 98 Suspended Solids Percent Removal 100 90 80 0 E m 70 0 so 50 Jon Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec t Final Effluent Llnear(Final Effluent) FINAL EFFLUENT ANNUALTRENDS <---FLQW--> Total Total Daily COD BQ❑ SS NH3-N NO3-N TKN Total-P CI TDS Turbidity C12 Coliforms Year MG MGD m 1L m 1L m IL m IL m IL m IL m IL mQJL m 1L NTI.1 m 1L Total Fecal)E a H 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 1,532A0 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 1A 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 &0 13A 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 8A 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 9.6 646 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 39A 7A 5A 20.5 0.03 21 A 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 2A 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 2A 7.62 1998 1.693.40 4,64 35.6 6.9 4A 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 2A 749 2000 1.685.90 4.74 42A 7.9 3.9 20.7 0.04 20.9 2.55 53 226 2.8 4.5 2.1 2A 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 2.0 743 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 47A 7.9 3.8 23.1 0A4 26.3 3,19 56 242 4.8 6.0 2.1 2A 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 3.57 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 22 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 3A 5A 6.4 62 7.71 2013 1,409.31 3.86 6.5 2.7 24A 0.53 27.8 3.13 49 250 3.6 6A 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 3A 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 6A 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 1.0 783 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 Permit Max 300 45 60 20 240' Permit Ave 60 30 30 10 231 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 2542 48A 7,86 Minimum 1,243.81 3.40 14.0 2.0 1.0 1.0 0.03 7.8 0.12 44 220 0.7 0.7 0A 0.5 7.10 Average 1,575.22 4.35 35.6 6.2 3.4 16.9 2,89 22.6 2,61 67 298 3 0 5.6 10.1 3.4 7.55 #Years 41 41 32 41 41 41 41 32 41 41 41 41 41 32 32 41 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 p 6 1,800 L7 g 5 -a 1, 00 44 I I 4 — 1,200 3 900 42 Y Y 1 2 600 40 1 300 0 0 38 2000200120022003200420052006200n0062009201020112012201320142015201620m016201=20 36 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2016 2019 2020 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 15.0 E 15.0 10.0 10.0 5.0 5.0 0.0 0.0 200020012002200320042005200620072008200920102011201220132014201520162017201620192020 200020012002200320042005200620072006200920102011201220132014201520162017201820192020 FINAL EFFLUENT Ammonia-Nitrogen Total Phosphorus Annual Trends Annual Trends 30 10 9 25 S 20 ...- - 7 s J J ar 15 g E E 4 f 10 5 - 2 1 — — a a 2000 Z00120022D03 2004 2005 2006 2D072DO62000 ZO102011 2012 201 3 2014 2015 2016 2017 201 B 20192020 20002001 2002 2003 2004200520d62007 20D0 2009 2010 2011 201 2 201 3 2014 2015 2016 2017 201 B M 192020 Nitate-Nitrogen Chlorides & TDS Annual Trends Annual Trends 20 350 700 300 600 15 250 500 J E 200 400 a. ri E J 1 a 150 300 V 100 - 200 50 100 200020D12002200320Di2DOS20062007200a200s201020+1201220132014201'320162017201020192020 a 2000200120D220032004 2005 2006 2007 2006 2009 201 D 2011 2012 2013 2014 201 5 2016 2017 201 8 2f1192020 —*--Chlwide5 t TDS Linear(TDS) Linear[Chlandes] FINAL EFFLUENT Turbidity Total Chlorine Annual Trends Annual Trends 20 20 15 15 10 E 10 --y zz 0 0 2000 2001 2002 2003 200d 200520062007200620W 20102011 2012 20132014201520152017201020192020 20002001 20022000200420052006 2007 20H 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 pH Annual Trends 11 10 9 8 2 a 7 6 5 j 4 2000 2001 2002 2003 2004 0005 2006 2007 2000 2009 2010 2011 2012 2013 2014 2015 20$6 2017 2010 2019 2020 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 Fe Hg Mn Mo Ni Pb 5e 5b 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 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 Fe Hg Mn Ma Ni Pb 5e 5b 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 C2 [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 C0.1 29 10 [2 C2 <10 C2 C4 C2 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 C4 [4 <20 <4 <2 C4 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 E0.1 36 12 2 [2 <10 <2 <1 [4 20 12/14/2020 <50 r0.1 36 9 <5 <5 <25 <5 <2.5 <5 <50 South Tahoe PUO Biosolids Cake Metals Results reported as wet weight Solids As Be Cd Cr Cu Pb Hg M0 Ni 5e Ag Zn site Date II]# % mg/Kq mglKg mglKg mg1Kg mglKg mg/Kg mglKg mgJKg mgfKq mgXg mgft mglKg Cake 02/03/14 AG39474 29.0% 0.7 < 0.3 c 0.3 1.8 33 1.1 0.16 1.9 1.3 a 2.0 a 0.3 Cake 05/12/14 AG40792 27.0% 0.6 < 0.3 c ❑.3 1.8 33 1 ❑ 0.11 1 3 1.4 c 2.0 c 03 85 Cake 08/13/14 AG42401 28.0% 0.9 < 0.3 0.3 1.9 43 2 1 008 2.5 1.2 a 20 04 120 Cake 11/11/14 AG43808 28.0% 0.9 a 0.3 04 1.9 35 1.2 008 2.0 1.3 < 2.0 < 0.3 97 Cake 02123115 AG45177 46.0% 1.0 < 0.5 c 0.5 2.5 54 1.5 0.15 2.6 1.7 a 2.5 a 0.5 150 Cake 05/19/15 AG46276 36.0% 1.4 c 0.4 c ❑A 24 56 1.9 0.20 2.4 1.6 r 2.0 c 0.4 155 Cake 08/03/15 AG47322 45.0% 1A a 0.5 a 0.5 1.7 57 1.7 0.11 2.6 1.4 < 3.0 a 0 5 180 Cake 11110115 AG48725 28.0°l0 0.9 0.3 < 0.3 0.9 32 1.0 0.08 1.6 1.0 < 1.5 c 0.3 92 Cake 02/02/16 AG49699 2B.0% 1.0 a 0.3 a 0.3 2.0 36 1.0 006 1 8 1.3 r 1.5 0.3 89 Cake 05103/16 AG50811 33.0% 1.0 c 0.3 < 0.3 2.3 29 1.3 0.06 1.6 1.3 c 2.0 c 0.3 91 Cake 08/08/16 AG52307 28.0% 0.9 a 0.3 < 0.3 1.6 35 1.1 0.05 18 10 < 14 c 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 ❑ < 1 5 a 0.3 100 Cake 02/13/17 AG54852 25.0% 0.8 a 0.2 a 0.2 1.9 28 1.8 004 1.3 1.5 < 1.2 1 4 70 Cake 05/22/17 AG56207 15,0% 0.4 c 0.2 c 0.2 09 16 0.9 0.05 09 07 c 08 c 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 a 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% ❑6 < 0.3 < 0.3 1 6 28 0.7 0.04 1.4 1.0 ¢ 1.2 a 0.3 78 Cake 06/13/18 AG61825 27.0% ❑8 c 0.3 c 0.3 1.4 46 0.9 0.05 26 09 < 1 3 0.4 120 Cake 09/19/18 AG63367 28.0% 1 A a 0.3 0.6 2.2 53 1 A 0.07 3.4 1.4 < 1.4 06 140 Cake 11/28/18 AG64325 34.0% 1.4 < 0.3 0.3 3A 48 1.4 0.08 37 1.7 < 1.7 0.3 120 Cake 02/13/19 AG65309 29% 0.7 a 0.3 a 0.3 2.6 32 0.8 0.16 1.8 1 6 < 1 4 c 0.3 81 Cake 06/19/19 AG67222 28% 0.8 < 0.3 c 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 a 03 03 25 48 1.2 0.06 2.8 1.5 < 1 2 0.3 152 Cake 12/03/19 AG69847 34% 1.0 c 0-3 0.4 2.4 37 1.4 0.10 19 1.4 c 16 c 0.3 100 Cake 02/20/20 AG70851 30% 0.6 < 0.3 03 2.4 34 0.6 0.03 1 3 1 8 c 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 B 1 6 < 1.4 0.3 150 Cake 09/13/20 AG73823 29% 1.0 < 03 0.8 2-0 49 1.2 0.06 1 8 1 8 a 1 4 r 0.3 150 Cake 12/14/20 AG75275 26% 1.0 c 0.3 c 0.3 2.7 45 0.8 005 1 6 1 3 c 1 3 < 0.3 94 Maximum 46.0% 1.4 c 05 0.6 3.1 82 3.0 0.20 3.7 2.0 30 14 280 Minimum 15.0% 0.4 a 0.1 a 0.2 09 16 0.6 c 0.01 0.9 07 < 0.5 c 02 44 Average 29.3% 0.9 0.3 0.3 2.0 41 1.3 0.08 2.0 1.4 16 0.4 119 #Tests 28 28 28 28 28 28 28 28 28 28 28 28 28 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# % m IK mg(Kg rnqfKq MRIxg m 1K mg/Kg mg/Kg rngIKQ M91K9 mg&g rng)Kq__rngXg m IKt Cake 02/03/14 AG39474 29.0% 2 C 1 a 1 6 114 4 ❑55 7 4 C 7 C 1 317 Cake 051121l4 AG40792 27 0% 2 C 1 C 1 7 122 4 0.41 5 5 C 7 c 1 315 Cake 08/13/14 AG42401 28 0% 3 C 1 1 7 154 8 029 9 4 C 7 1 429 Cake 11/11/14 AG43808 28.0% 3 c 1 1 7 125 4 0.29 7 5 r 7 ¢ 1 346 Cake 02/23/15 AG45177 46.0% 2 C 1 < 1 5 117 3 ❑33 6 4 r 5 ¢ 1 326 Cake 05/19/15 AG46276 36 0% 4 c 1 C 1 7 156 5 056 7 4 C 6 C 1 431 Cake 08/03/15 AG47322 45.0% 2 < 1 < 1 4 127 4 ❑24 6 3 C 7 r 1 400 Cake 11/10/15 AG46725 28.0% 3 C 1 C 1 3 114 4 029 6 4 C 5 C 1 329 Cake 02/02/16 AG49699 28 0% 4 < 1 < 1 7 129 4 0.21 6 5 r 5 1 318 Cake 05/03/16 AG50611 33 0% 3 C 1 C 1 7 88 4 0 18 5 4 C 6 C 1 276 Cake D8108116 AG52307 28 0% 3 C 1 < 1 6 125 4 0.18 6 4 C 5 < 1 464 Cake 11/01/16 AG53656 26.0% 4 C 1 C 1 8 123 4 C 003 8 4 6 C 1 385 Cake 02/13/17 AG54852 25 0% 3 C 1 < 1 8 112 7 0 16 5 6 5 6 280 Cake 051221l7 AG56207 15 0% 3 C 1 C 1 6 107 6 033 6 5 C 5 C 1 293 Cake 08/15/17 AG57585 26.0% 3 C 1 C 1 6 135 3 0.23 7 5 C 5 C 1 538 Cake 11/14/17 AG58968 28 0% 5 C 0.5 1 6 293 5 ❑36 10 5 2 2 1000 Cake D2121118 AG60195 25 0% 2 C 1 C 1 6 112 3 017 6 4 C 5 C 1 312 Cake 06/13/18 AG61825 27 0% 3 C 1 C 1 5 170 3 ❑20 10 3 r 5 1 444 Cake 09/19/18 AG63367 28.0% 4 C 1 2 8 189 4 025 12 5 < 5 2 500 Cake 11/28/18 AG64325 34.0% 4 C 1 1 9 141 4 ❑24 11 5 r 5 1 353 Cake 02/13/19 AG65309 29 D% 2 C 1 < 1 9 110 3 062 6 6 < 5 C 1 279 Cake 06/19/19 AG67222 28.0% 3 c 1 C 1 7 193 11 ❑18 7 7 C 5 a 1 464 Cake 09/18/19 AG68788 25.0% 5 a 1 1 10 192 5 024 11 6 C 5 1 608 Calve 12/03/19 AG69847 34 0% 3 C 1 1 7 109 4 ❑29 6 4 C 5 C 1 294 Cake 02/20/20 AG70551 30.0% 2 c 1 1 8 113 2 011 4 5 a 5 < 1 293 Cake 06/10/20 AG72311 28 0% 5 C 1 1 10 175 5 025 6 6 c 5 1 536 Cake 09/13/20 AG73823 29.0% 3 C 1 3 7 169 4 0.19 6 6 < 5 c 1 517 Cake 12/14/20 AG75275 26.0% 4 C 1 C 1 10 173 3 ❑19 6 5 a 5 < 1 362 Maximum 46.0% 5 1 3 10 293 11 062 12 7 7 6 1000 Minimum 15.0% 2 0 1 3 86 2 003 4 3 2 1 276 Average 29.3% 3 1 1 7 143 4 027 7 5 5 1 407 #Tests 28 28 28 2B 28 28 28 28 28 28 28 28 28 Percent As Be Cd Cr Cu Pb Hg Mo Ni Se Ag Zn a0 a0 a0 a0 a0 a0 a0 n0 a0 a0 a0 a0 a0 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 Coo and Settleable Solids 1994 2,152 0 100.0 1995 2,047 1 99.95 Settleable Solids 516195=6.3 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 Results do not include flow measurements Discharge Violations C) C) r 0 av I O Cw v w o_ �C:) N �D �O �D �D �O �D �L OD �L vD rG N �O �D �D �D OD O O pO O p❑ O pO O ❑ ❑ O O_ O ❑ _❑ ❑_ ❑_ O_ ❑_ O_ ❑ Ca oY 0 0 o0 0) m w � Ip cn Iv <O [o m fn P P N W P fPn W A U+ m O1 �1 G! 0 + N A C, Q1 �1 CO vD 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, 2021 Period Covered by this Report: January 1, 2020 to December 31, 2020 Name of Wastewater Treatment Plant NPDES Permit Number South Tahoe Public Utility District Board Order No: R6T-2004-0010 WDI5 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. ate Signature of Official Chief Plant Operator Title ANNUAL PRETREATMENT REPORT 2020 Section I —Results of Wastewater Treatment Plant Sampling and Analysis The wastewater treatment plant influent, effluent and sludge were sampled December 14, 2020 for pollutants EPA has identified under Section 307(a) of the Clean Water Act. The results are attached. Due to an oversight on the part of STPUD Laboratory. EPA Method 8260, Volatile Organic Compounds (VOC), was not done on the above mentioned sludge. Replacement samples of plant influent, effluent and sludge were collected on March 2, 2021 and analyzed for VOC. Results are attached. 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. One (1) establishment was deleted because it was 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 248 on-site inspections conducted during 2020. These inspections were primarily conducted at discharger, 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 13 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 rc-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. Due to the fact that there are no categorical or significant non-categorical industrial users, funds cannot be generated from user fees. Figures are based on Lab 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 2020 Table 4-A GREASE TRAPIINTERCEPTOR&SAND/OIL INTERCEPTORS Inspectors Names Cuz Cullen NEW NAME ADDRESS COMMENTS Dragon Fly Bagel 3358 Sandy way Tahoe Prominence 933 Poplar Was Tahoe Villa Motel Swiss Chalet Fine Foods 2544 Lake Tahoe Blvd. Bare Roots Coffee 2572 Lake Tahoe Blvd. NAME CHANGED NEW NAME OLD NAME Sombrero's 3132 HWY 50 Burger Lounge Hampton Inn 383B Lake tahce Blvd. Quality Inn Thirdman Ta house 3668 Lake tahoe Blvd. Kentucky Fried Chicken -:;LC.aED NAME ADDRESS COMMENTS Bear Beach CaM 3310 Lake Tahoe Blvd. ROUTE INFO How many traps/interceptors on your route? 253 How many total inspections were done? 248 How many correction notices were written? 13 SOUTH TAHOE PUBLIC UTILITY DISTRICT MEMORANDUM From The Lab Date: March 2, 2021 To: Jeff Lee, Manager of Wastewater Operations Cuz Cullen, inspection Supervisor From: Dan Arce, Laboratory Director Topic: EPA Priority Pollutants Samples were collected from the Raw Influent, Final Effluent and Centrifuge Cake on December 14, 2020 and analyzed for metals and organic chemicals. Raw Influent and Final Effluent were 24-hour composites, with the exception the Raw and Fina!VOC's. The Raw and Final VOC's were grab samples obtained 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-though. 1. Metals Metal results for Final Effluent were all below the drinking water primary Maximum Contaminant Levels (MCL). Raw Influent had Iron and Manganese detected above the drinking water 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 (1 0 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. March 2, 2021 Page 2 Metal Concentrations Sample date: December 14, 2020 Drinking Raw Final Water Compound Units Influent PQL Effluent POL MCL Aluminum p IL 210 50 ND 50 1,000 Antimony pg/L ND 5 ND 5 6 Arsenic pgJL ND 5 N❑ 5 10 Barium gIL 27 25 ND 25 1,000 Beryllium pg/L ND 5 ND 5 4 Cadmium p IL ND 5 ND 5 5 Calcium m IL 21 0.5 18 0.5 Chromium m IL ND 5 ND 5 50 Cobalt p IL ND 5 ND 5 Copper IL 58 5 17 5 1,000 Iron p IL 760 50 ND 50 300 Lead p IL ND 5 ND 5 15 Magnesium mg/L 5 0.5 5 0.5 Manganese p IL 53 5 36 5 50 Mercu p IL ND 0.1 ND 0.1 2 Molybdenum p IL 10 5 9 5 Nickel IL ND 5 ND 5 100 Potassium m IL 14 0.5 13 0.5 Selenium p IL ND 25 ND 25 50 Silver pg/L ND 5 ND 5 100 Sodium m IL 43 0.5 53 0.5 Thallium pg/L ND 2.5 ND 2.5 2 Vanadium IL ND 5 ND 5 Zinc p IL 110 50 ND 50 1 5,000 Notes:The samples for metals are 24-hour flow-proportioned composites. C:%UserMdanlAppData%Local%MicrosoftlWindowslTamparary Internet FilaslContent 0 ut loWS D22 CZ NGQrg a n i cs 2020(002)doc March 2, 2021 Page 3 Centrifuge Cake Metals Sample Date: December 14, 2020 Centrifuge Cake Date: 12114/2020 ID: AG75275 Wet Weight STLC Result 10xSTLC TTLC mg/Kg mg/Kg mg/Kg mg/Kg > STLC 10xSTLC >TTLC Antimony 15 <0.3 150 500 no no no Arsenic 5 1 50 50 no no no Barium 100 18 1,000 10,000 no no no Beryllium 0.75 <0.3 7.5 75 no no no Cadmium 1 c0.3 10 100 no no no Chromium 5 2.7 50 2,500 no no no Cobalt 80 <0.3 800 8,000 no no no Copper 25 45 250 2,500 YES no no Lead 5 0.8 50 1,000 no no no Mercury 0.2 0.05 2 20 no no no Molybdenum 350 1.6 3,500 3,500 no no no Nickel 20 1.3 200 2,000 no no no Selenium 1 < 1.3 10 100 YES no no Silver 5 <0.3 50 500 no no no Thallium 7 < 0.13 70 700 no no no Vanadium 24 2.3 240 2,400 no no no Zinc 250 100 2,500 5,000 no no no CAUsers%danlAppDatalLocaI)Microsoffi indowslTemporary Internet FilesiContent 0 Li t look%BD22CZN&Organ ics 2020(002)doc March 2, 2021 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. Volatile Organic Compounds (VOCs) were tested in the Raw Influent and Final Effluent. VOCs were not tested in the Centrifuge Cake. This was an oversight on the part of the Laboratory. We will be collecting a replacement Cake Sample, as well as Raw Influent and Final Effluent, as soon as possible and testing for VOCs. The detected compounds are tabulated below. Organic Compounds Test Results Detections December 14, 2020 Raw Final Centrifuge Influent Effluent Cake Compound IL IL IK Acetone 50 ND Not analyzed Chloroform ND 1 Not analyzed Ethyl Benzene 1.1 ND Not analyzed Phenol 25.7 ND ND Toluene 3.4 ND Not analyzed ND: Not Detected C:WsarsWan\AppOatal Lora lWicrosoMWindows%Temporary Internet FileslContant 0utlook%B022CZNG%Organics 2020(002)doc April 12, 2021 Page 1 SOUTH TAHOE PUBLIC UTILITY DISTRICT MEMORANDUM From The Lab Date: April 12, 2021 -mow- To: Jeff Lee, Manager of Wastewater Operations Cuz Cullen, Inspection Supervisor From: Dan Arco, Laboratory Director Topic: EPA Priority Pollutants Samples were collected from the Raw Influent, Final Effluent and Centrifuge Cake on March 2, 2021 and analyzed for organic chemicals. The Raw and Final VOC's were grab samples obtained during high flow conditions. The Centrifuge Cake sample was an 8-hour composite sample. The samples were collected so that EPA Method 8260 could be run on the Cake. Due to a STPUD Laboratory error, EPA 8260 was not requested on the December 14,2020 sample. As soon as this was noticed, a Raw, Final and Cake samples were collected as replacements. New samples will be collected for compliance in 2 02 1. Organic Analyses Volatile Organic Compounds (VOCs)were tested in the Raw Influent and Final Effluent and Centrifuge Cake. The detected compounds are tabulated below. Organic Compounds Test Results Detections March 2 , 2021 Raw Final Centrifuge Influent Effluent Cake Compound IL IL wqlKq Chloroform N❑ 0.86 N❑ 2-Butanone (MEK) ND ND 160,000 Acetone Not analyzed Not analyzed 210,000 Toluene N❑ N❑ 980 ND: Not Detected PALA61D_ORIVE1LahontanlPrioritV PoIIutantskOrganics 2020 addendum doc Silver Sate Labs-Reno January 07, 202 l SiIverStat 1135 Financial Blvd Workorder 20120831 Analytical Laboratories Reno,NV s9502 Sierra Environmental Monitoring (775)857-2400 FAX:(888)398-7002 www."alabs.com Dan Arcc SOUTH TAHOE PUBLIC UTILITY DISTRICT 1275 Meadow Crest Drive South Lake Tahoe,CA 96150 Project: EPA Priority PoIlutantsl 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.Silvcr State Analyticai Laboratory-Reno maintains accreditation in the State of Nevada(NV-00015)and the State of California(FLAP 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. Prep Comments For EPA 3050,Sample 20120831-04A:Calculation Revised Report:Added Mn to W W-04 Final Effluent. Sincerely, C&I-e Carly Wood Laboratory Director 1 135 Financial Blvd Reno,NV 89502 Revision v] Page 1 of 17 1T Silver Stale Labs-Rena Analytical Report S i I t ve■r S 1 ate 1135 financial Blvd Analytical Laboratories Reno,NV 89592 Workorder#: 20120831 Sierra Environmental Monitoring (775)857-2400 I.AX:(888)398-7002 Date Reported: 11712021 www.ssalabs.eom Client: SOUTH TAHOE PUBLIC UTILITY DISTRICT Sampled By: Auto Laps Project Name: EPA Priority Pollutants/W W-01 Raw Influent Po#: Laboratory Accreditation Number: NV0151CA2990 Laboratory ID Client Sample ID Date/Time Sampled Date Received 20 1 2083 1-0 1 W W-01 Raw Influent 12/14/2020 5:00 12/16/2020 Date/Time Data Parameter Method Result Units PQL Analyst Analyzed Flag Aluminum EPA 200.7 0.21 mglL 0.05 KL 12/30/2020 11:05 Antimony EPA 200.8 a0.005 mg1L 0.005 KL 12/15/2020 11:41 Arsenic EPA 200.8 <0.005 mg1L 0.005 KL 12/18/2020 11:41 Barium EPA 200.8 0.027 mg1L 0.025 KL 12/18/2020 11:41 Beryllium EPA 200.8 a0.005 mg1L 0.005 KL 12/18/2020 11:41 Cadmium EPA 200.8 a0.005 mg1L 0.005 KL 12118/2020 11:41 Calcium EPA 2003 21 mg1L 0.5 KL 12/30/2020 11:05 Chromium EPA 200.8 <0.005 mg1L 0.005 KL 1211 B12020 11:41 Cobalt EPA 200.8 <0.005 mg1L 0.005 KL 12/18/2020 11:41 Capper EPA 200.8 0.058 mg1L 0.005 KL 12/18/2020 11:41 Iron EPA 200.7 0.76 mglL 0.05 KL 12/30/2020 11:05 Lead EPA 200.8 a0.005 mglL 0.005 KL 12/18/2020 11:41 Magnesium EPA 200.7 5.1 mglL 0.5 KL 12/30/2020 11:05 Manganese EPA 200.8 0.053 mg/L 0.005 KL 12/18/2020 11:41 Mercury EPA 245A c 0.0001 mg1L 0.0001 KL 12/23/2020 14:01 S Molybdenum EPA 200.8 0.010 mg1L 0.005 KL 12/18/2020 11:41 Nickel EPA 200.8 <0.005 mglL 0.005 KL 12/18/2020 11:41 Potassium EPA 200.7 14 mglL 0.5 KL 1213=O2O 11:05 Selenium EPA 200.8 a0.025 mglL 0.025 KL 1 2/1 812020 11:41 Silver EPA 200.8 a0.005 mglL 0.005 KL 12/18/2020 11:41 Sodium EPA 2003 43 mg1L 0.5 KL 12/30/2020 11:05 Thallium EPA 200.8 <0.0025 mglL 0.0025 KL 12/18/2020 11:41 Vanadium EPA 200.8 <0.005 mgJL 0.005 KL 12/18/2020 11:41 Zinc EPA 200.8 0.11 mg1L 0.05 KL 12/18/2020 11:41 Revision v I Page 2 of 17 Silver Slate Labs-Reno i lverState 1135 Firrnncial Blvd Analytical Report �R Analytical Laboratories kenn,•1's�15o2 GV [77;}8;7-2dUU FAX:(888}3'78-7nnZ nrknrder#: 2012i]831 Sierra Environmental Monitoring Date Reported: 1/7/2021 w ww,-,sa I a bs.co m Client: SOUTH TAHOE PUBLIC UTILITY Di STRICT Sampled By: Auto Lops Project Name: EPA Priority Pollutants/W W-0I Raw Influent PO#: Laboratory Accreditation Number: NV015/CA2990 Laboratory ID Client Sample ID Date/Time Sampled Date Received 20120831-02 WW-04 Final Effluent 12/14/2020 7:21 12/16/2020 Daterrime Data Parameter Method Result Units PQL Analyst Analyzed Flag Aluminum EPA 200.7 <0.05 mglL 0.05 KL 12130r2020 11:07 Antimony EPA 200.8 <0.005 mglL 0.005 KL 12/18/2020 11:47 Arsenic EPA 200.8 <0.005 mg1L 0.005 KL 12/18/2020 11:47 Barium EPA 2008. <0.025 mglL 0.025 KL 12/18/2020 11.47 Beryllium EPA 200.8 <0.005 mglL 0.005 KL 12/18/2020 11:47 Cadmium EPA 200.8 c0.005 mglL 0.005 KL 12/18/2020 11:47 Calcium EPA 2003 18 mglL 0.5 KL 12/30/2020 11:07 Chromium EPA 200.8 a0.005 mglL 0.005 KL 12/18/2020 11:47 Cobalt EPA 200.8 <0.005 mg/L 0.005 KL 1 211 812020 11:47 Copper EPA 200.8 0.017 mg1L 0.005 KL 1211 B12020 11:47 Iron EPA 200.7 <0.05 mg1L 0.05 KL 12/3012020 11:07 Lead EPA 200.8 c0.005 mglL 0.005 KL 12/18/2020 11:47 Magnesium EPA 200.7 4.5 mg1L 0.5 KL 12/30/2020 11.07 Manganese EPA 200.8 0.036 mglL 0.005 KL 12/18/2020 11:47 Mercury EPA 245.1 a 0.0001 mglL 0.0001 KL 12/23/2020 14:01 S Molybdenum EPA 2003 0.009 mg[L 0.005 KL 12/18/2020 11:47 Nickel EPA 200.8 <0.005 mglL 0.005 KL 12/18/2020 11:47 Potassium EPA 200.7 13 mg1L 0.5 KL 12/30/2020 11:07 Selenium EPA 200.8 <0.025 mg1L 0.025 KL 121l W2020 11:47 Silver EPA 200.8 <0.005 mglL 0.005 KL 1211 812020 11 A Sodium EPA 200.7 53 mg1L 0.5 KL 12/30/2020 11:07 Thallium EPA 200.6 c0.0025 mg1L 0.0025 KL 12/18/2020 11:47 Vanadium EPA 200.6 a0.005 mg1L 0.005 KL 12/18/2020 11:47 Zinc EPA 200.8 a0.05 mg1L 0.05 KL 12/18/2020 11:47 Revision vI Page 3of17 Silver State I.ah,,-Reno Si IvrerState 1135 inancfal Blvd Analytical Report Analytical Laboratories Rena,iNV 89592 Workorder#: 20120831 Sierra Environmental Monitoring (775)857-2404)FAX:(888)398-7062 �vn•n.ssalahs.com Date Reported: 11712021 Client: SOUI'I I TAIIOE PUBLIC UTILITY DISTRICT Sampled By: Auto Lops Project Name: EPA Priority Pollutants/W W-01 Raw Influent PO#: Laboratory Accreditation Number: NV015/CA2990 Laboratory ID Client Sample ID Date/Time Sampled Date Received 20120831-03 W W-l4 Centrifuge Cake-Dry 12/14/2020 19:30 12/16/2020 Date/Time Data Parameter Method Result Chits PQL Analyst Analyzed Flag Aluminum EPA 6010 800 mg/Kg 25 KL 12/30/2020 13:10 S Antimony EPA 6020 <1 mg/Kg 1 KL 12/30/2020 1:42 Arsenic EPA 6020 4 mg/Kg 1 KL 12/30/202D 1:42 Barium EPA 6020 69 mg1Kg 5 KL 12/30/2020 1:42 S Beryllium EPA 6020 c1 mg1Kg 1 KL 12/30/2020 1:42 Cadmium EPA 6020 <1 mg1Kg 1 KL 12/30/2020 1:42 Calcium EPA 601❑ 9500 mg/Kg 250 KL 1 2/30/2020 13:10 S Chromium EPA 6020 10 mg/Kg 1 KL 12/30/2020 1.42 Cobalt EPA 6020 <1 mg/Kg 1 KL 12/30/2020 1:42 Copper EPA 6020 170 mg/Kg 1 KL 12/30/2020 1:42 Iron EPA 6010 2900 mglKg 25 KL 12/30/2020 13:10 S Lead EPA 6020 3 mg1Kg 1 KL 12/30/2020 1:42 Magnesium EPA 6010 1500 mg/Kg 250 KL 12/30/2020 13:10 S Manganese EPA 6020 64 mg1Kg 1 KL 12/30/2020 1:42 S Mercury SW-846 7471 B 0.21 mg/Kg 0.03 KL 12123/2020 14:06 Molybdenum EPA 6020 6 mg/Kg 1 KL 12/30/2020 1:42 Nickel EPA 6020 5 mg1Kg 1 KL 12/30/2020 1:42 Potassium EPA 6010 2200 mg1Kg 250 KL 12/30/2020 13:10 S Selenium EPA 6020 <5 mglKg 5 KL 12/30/2020 1:42 Silver EPA 6020 <1 mglKg 1 KL 12/30/2020 1:42 Sodium EPA 6010 430 mglKg 250 KL 121301202013:10 S Thallium EPA 6020 <0-5 mg/Kg 0.5 KL 12/30QO20 1:42 Vanadium EPA 6020 9 mglKg 1 KL 12/3012020 1:42 S Zino EPA 6020 360 mg/Kg 10 KL 12/30/2020 1:42 S Revision v I Page 4 of 17 tiilvcr Slate[.abs-Rena C l!■erStatA 1135 Financial Blvd Analytical Report k Analytical Laboratories Reno.-W 89502 s Sierra Environmental Monitoring (775)x57-2d11fF FAX:[xxx)3��x-7ot]z Workardcr#: 2012U831 Date Reported: 117121121 wwn.ssalabs.com Client: SOUTH TAHOE PUBLIC UTILITY DISTRICT Sampled By: Auto bops Project Name: EPA Priority Pollutants/ WW-01 Raw Influent PO 4: Laboratory Accreditation Number: NV015/CA2990 Laboratory ID Client Sample 1D Date/Time Sampled Date Received 2012083 1-04 WW-10 Ccntrifugi:Cakc-Wct 12/14/2020 19:30 12/16/2020 Date/Time Data Parameter Method Result Units PQI, Analyst Analyzed Flag Aluminum EPA 6010 210 mglKg 6.5 KL 1213012020 1 6:15 S Antimony EPA 6020 a0.26 mglKg O.Qol KL 12/30/2020 14:51 Arsenic EPA 6020 1 mglKg 0.001 KL 12/30/2020 14:51 Barium EPA 6020 18 mg/Kg 0.005 KL 12/30/2020 14:51 Beryllium EPA 6020 <0.26 mglKg 0.001 KL 12/30/2020 14:51 Cadmium EPA 6020 a0.26 mglKg 0.001 KL 12/30/2020 14:51 Calcium EPA 6010 2500 mglKg 65 KL 12/30/2020 18:15 S Chromium EPA 6020 2.7 mglKg 0.001 KL 12/30/2020 14:51 Cobalt EPA 6020 <0.26 mglKg 0.001 KL 12/30/2020 14:51 Copper EPA 6020 45 mglKg 0.001 KL 12/302020 14:51 Iron EPA 6010 750 mg1Kg 6.5 KL 1213012020 1 6:15 S Lead EPA 6020 0.78 mg[Kg 0.001 KL 12/30/2020 14:51 Magnesium EPA 6010 380 mglKg 65 KL 1 2/30/2020 1 6:15 S Manganese EPA 6020 17 mglKg 0.001 KL 12/30/2020 14:51 Mercury SW-8467471B 0.05 mglKg 0.008 KL 12/231202014:06 Molybdenum EPA 6020 1.6 mglKg 0.001 KL 12/30/2020 14:51 Nickel EPA 6020 1.3 mglKg 0.001 KL 12/30/2020 14:51 Percent Moisture SM 2540 G 74 % 0.1 KL 12/24/2020 10:08 Potassium EPA 6010 580 mg/Kg 65 KL 1 2/30/2020 1 6:15 S Selenium EPA 6020 a1.3 mglKg 0.005 KL 12/30/2020 14:51 Silver EPA 6020 G0.26 mglKg 0.001 KL 12/30/2020 14:51 Sodium EPA 6010 110 mglKg 65 KL 12/30/2020 16:15 S Thallium EPA 6020 <0.13 mglKg 0.0005 KL 12/30/2020 14:51 Vanadium EPA 6020 2.3 mglKg 0.001 KL 12/30/2020 14:51 Zinc EPA 6020 94 mglKg 0.01 KL 12/30/2020 14:51 S Revision vl Page 5 of 17 Sdhertilide Labs-Reno Quality Control Report Si lve Ir StateQ I13ti Fiisam•inI Blvd Analytical Laboratories licnu,L1 89502 WQ#: 20120831 *Sierra Environmental Monitoring (775)857-2400 FAX.(888)398-7002 1/7/2021 www.ssa labs.coni Analvsis: Metals 200.8 Method: EPA 200.8 Batch ID: R49094 Method Blank RunlO: 49094 SegNc 1181334 Units: mg1L Analysis bate. 1 211 812020 8:40:02 AM Analyst: KL Analyte Result Rep Limit Rep Qual Antimony r 0.0020 0.0020 Arsenic a 0.0020 0.0026 Barium a 0.010 0.010 Beryllium <0.0020 0.0026 Cadmium <0.0020 0.0020 Chromium a 0.0020 0.0020 Cobalt <0.0020 0.0020 Copper a 0.0020 0.0020 Lead <0.0020 0.0020 Manganese a 0.0020 0.0020 Molybdenum c 0.010 0.010 Nickel <0.0020 0.0020 Selenium <0.010 0 010 Silver c 0.0020 OA020 Thallium a 0,00101 000101 Vanadium a 0 00201 0.0020 Zinc a 0,0201 0.020 Revision vl Page 6 of 17 �" +Q.3 er-Ntm,Labs-Reno Quality Control Report Silver I state 1 V 1135Financial Blvd Analytical Laboratories kc""•NV 89502 WO#: 20120831 0 Sierra Environmental Monitoring (775)857-2400 FAX:(888)398-7002 1/7/2021 www.ssalabs.com Method Blank RunID: 49094 SegNo 1181341 Units: mglL Analysis Date: 12/15/2020 10:17:48 AM Analyst: KL Analyte Result Rep Limit Rep 4ual Antimony <0.0020 0.0020 Arsenic <0.0020 0.0020 Barium <0.010 0.010 Beryllium a 0.0020 0.0020 Cadmium a 0.0020 0.0020 Chromium a 0.0020 0.0020 Cobalt a 0.0020 0.0020 Copper r 0.0020 0.0020 Lead a 0.0020 0.0020 Manganese <0.0020 0.0020 Molybdenum a 0.010 0.010 Nickel <0.0020 0.0020 Selenium <0.01 D 0.010 Silver a 0.0020 0.0020 Thallium c 0.0010 0.0010 Vanadium c 0.0020 0.0020 Zinc c 0.020 0.020 LabMl4ry Cgntrpl$a.pl81tr1>0) RunID: 49094 SegNo 1181296 Units: mg/L Analysis Date: 1211 Bl2020 4:52:53 AM Analyst: KL Analyte LCS LCS Result LCS% LCSD LCS❑ LCSD% RPD RPD Low High Ltual Spike Recovery Spike Result Recovery Limit Limit Limit Added Added Antimony 0.1000 0.092 92.4 Arsenic 0.1000 0.10 103 Barium 0.1000 0.0991 99.1 Beryllium 0.1000 0.10 100 Cadmium 0.1000 0.099 99.0 Chromium 0.1000 0.10 101 Cobalt 0.1000 0.10 99.9 Copper 0.1000 0.10 102 Lead 0.1000 0.101 99.8 Manganese 0.1000 0.10 100 Molybdenum 0.1000 0.096 95.9 Nickel 0.1000 0.099 98.5 Selenium 0.5000 0.51 101 Silver 0.1000 0.19 193 Thallium 0.1000 0-101 99.5 Vanadium 0.1000 0.10 101 Zinc 0.1000 0-101 99.7 Revision v 1 4ilrer finite Lnbs-Rcno Quality Control Report Si[lve f state 1135 Financial Blvd Anolytictal Wboratorles Reno.NI 89502 Wt7#: 20120831 Sierra Env+ronmentaI Me (775)857-2400 F'.AX:(888)398-7002 1/7/2021 * www."alabs.com Laboratory Control Sample ILCS1 RunlD: 49094 SegNo 118134D Units: mglL Analysis Date: 1 211 812020 10A5:49 AM 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 0.092 92.0 Arsenic 0.1000 0.099 98.9 Barium 0.1000 01099198.7 Beryllium 0.1000 0.101 99.8 Cadmium 0.1000 0.10 99.6 Chromium 0.1000 0.099 99.3 Cobalt 0.1000 0.098 98A Capper 0.1000 0.099 98.9 Lead 0.1000 0.10 99.6 Manganese 0.1000 0.0991 98.6 Molybdenum 0.1000 0.097 96.8 Nickel 0.1000 0.095 98A Selenium 0.5000 0.48 96-7 Silver 0.1000 0.10 104 Thallium 0.1000 ❑A 0 103 Vanadium 0.10001 0,0991 98.8 Zinc 0.10001 0,0981 97.7 Matrix Spike I SS]f Matrix Spike Duplicate(MSD1 Sample Spiked: 20120791-10B RunID: 49094 SegN❑ 1181350 Units: mg/L Analysis Date: 1 2/1 812020 11:11:31 AM Analyst: KL Analyte Sample MS MS MS% IYISD MSD IIASD% RPD RPD Low High Qual Result Spike Result Recovery Spike Result Recovery Limit Limit Limit Added Added Antimony 0003106 1.000 1.1 106 1.000 1.0 104 2.52 20 70 130 Arsenic 0.01127 1.000 0.9D 88.5 1.000 0.91 89.5 1.12 20 70 130 Barium 0.01727 1.000 0.89 87.6 1.000 0.90 88.2 0.649 20 70 130 Beryllium 0 1.000 0.91 91.3 1.000 0.90 90.0 1.43 20 70 130 Cadmium 0 1.000 0.85 86.1 1A00 0.87 96.8 0.847 20 70 130 Chromium .001292 1.000 0.88 87.4 1.000 0.57 86.8 0.676 20 70 130 Cobalt 001013 1.000 0.86 86.1 1.000 0.86 86.2 0.0727 20 70 130 Copper 0.01077 1.000 0.86 85.4 1.000 0.87 85.6 0.274 20 70 130 Lead 003350 1.000 0.86 86.5 1.000 0.871 86.9 0.5011 20 701 130 Manganese 1.001502 1.000 0.88 87.5 1.000 0.86 86.2 1.53 20 70 130 Molybdenum 1.006576 1.000 0.89 87.9 1.000 0.90 89.5 1.83 20 70 130 Nickel 0.01184 1.000 0.87 65.4 1.000 0.88 86-5 1.58 20 70 130 Selenium .004362 5.000 4.3 85.9 5.000 4A 87.5 1.82 20 70 130 Silver 001864 0.1000 0.10 102 0.1000 0.11 108 5.45 20 70 130 Thallium 0 1,0001 0.88 88.1 1.000 0.89 89.1 1.19 20 70 130 Vanadium 009018 1.000 0.90 89.4 1.000 0.89 89.3 0.161 20 70 130 Zinc 0,09596 1.000 0.95 85.6 1.000 0.96 86.1 0.517 20 701 130 Revision vl Page 8 of 17 Silvcr S'tatc Lah,,-Reno Quality Control Report Si lverState 1135 Financial Blvd Analytical Laboratories Reno,NV 89502 WOO: 20120831 5ierra Environmental Monitoring (775)857-2400 FAX:(838)398-7002 1/712021 HW ww.ssa la lls.c o m Analysis: Mercury Method: CPA 245.1 Batch ID: R49233 Method Blank RunlD: 49233 SegN❑ 1184166 Units: mg/L Analysis Date- 12/23/2020 2:01:34 PM Analyst: KL Analyte I Result I Rep Limit I Rep Qual Mercury I <000011 0.0001 Laboratory Control Sample(LCS) RunID: 49233 SegN❑ 1184187 Units: mglL Analysis Date: 12/23/2020 2:01:34 PM Analyst: KL Analyte LC5 ILGSResultj LCS% LCSD LCSD LCSD% RPD RPD Low High Qual Spike Recovery Spike Result Recovery Limit Limit Limit Added Added Mercury 0.0060001 0.006081 101 Matrix Spike iMS)I Matrlx Splice Duplicate(MSD} Sample Spiked: 20120968-01 B RunID- 49233 SegNo 1184196 Units: mg1L Analysis Date: 12/23/2020 2:01:34 PM Analyst: KL Analyte Sample MS MS MS% MSD MSD MSD% RPD RPD Low IHigh Qual Result Spike Result Recovery Spike Result Recovery Limit Limit Limit Added Added Mercury 0 005000 .00286 572 005000 1.00425 85.0 39.1 20 701 130 R Matrix Spike IMS]1 Matrix Spike Duplicate IMSD} Sample Spiked: 20121028-01B RunlD: 49233 SegNo 1184210 Units: mglL Analysis Date: 12/23/2020 2:01:34 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 Mercury 0 005000 .0043E 87.8 005000 .00307 61A 35.4 20 701 130 IRS Analysis: Mercury,RCRA Solid Method: SW-846 7471B Batch ID: R49234 Matrix 5nike(MS)1 Matrix Spike Duplicate(MSD,} Sample Spiked: 20120831-03A RunlD: 49234 SegNo 1184228 Units: mg1Kg Analysis Date: 12/23/2020 2:08:40 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 Mercury 0.2070 1 6001 1.751 96A 2.000 2.311 105 2761 20 701 130 R Revision vl Page 9 of l7 �+i %il�vertiiale Labs-Rena Quality Control Report Sf lver►Sate 1135 Finmicial Blvd Analytical Laboratories lienu•\% 895112 WOO: 20120831 i Sierra Environmental Monitoring (775)8e7-2400 FAX:(888)398-7002 1/7-1021 www.ssa I it hs.co m Analvsis: Metals 6020 Solid Method: EPA 6020 Batch ID: R49368 Method Blank RunID: 49368 SegNo 1187283 Units: mg/Kg Analysis Date: 12/3012020 1:18:12 AM Analyst: KL Analyte Result Rep Limit Rep Qual Antimony c 0-0020 00020 Arsenic c 0-0020 0.0020 Barium 0-010 0 010 Beryllium c 0.0020 0.0020 Cadmium a 0.0020 0-0020 Chromium 0.0022 0.0020 B Cobalt a 0.0020 0.0020 Copper 0.0027 0.0020 B Lead =0 0020 0.0020 Manganese a 0.0020 0.0020 Molybdenum <0 010 0-010 Nickel <0.0020 0.0020 Selenium <0.010 0.01❑ Silver a 0.0020 0.0020 Thallium a 0.00101 0.0010 Vanadium a 0.0020 0.0024 Zinc ¢0.02010-020 La t orajory Control Sample(LCS) RunlD: 49368 SegNa 1187256 Units: mg/L Analysis Date: 1212912020 1 0:18:29 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 01000 0-095 95.0 Arsenic 01000 0.10 105 Barium 01000 0.101 102 Beryllium 01000 0.10 103 Cadmium 0.1000 0.10 103 Chromium 0.1000 0.10 103 Cobalt 0.1000 010 102 Copper 0.1000 0.10 104 Lead 0.1000 0.101 103 Manganese 0.1000 0.10 102 Molybdenum 0.1000 0.099 99.1 Nickel 0.1000 0A0 104 Selenium 0.5000 0.52 103 Silver 1 0-1000 0.10 102 Thallium 0-1000 0-10 103 Vanadium 0-1000 0-10 101 Zinc 0.1000 0-101 102 Revision v 1 5ilvcr Slate Labs-Reno Quality Control Report SI Iver Mate 1135 Financial Blvd Analytical Laboratories Itenn.N%'89502 W04, 20120831 0 Sierra Environmental Monitoring (775)M57-2400 FAX:(838)398-7002 1/7/2621 www.ssal.ibs.com Laboratory Control Sample ILCS1 RurlD. 49368 SegNo 1187295 Units. mg/L Analysis Date: 12130l2020 3:25:54 AM 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 0.093 92.9 Arsenic 0.1000 0.10 103 Barium 0.1000 0.101 103 Beryllium 0.1000 0.10 101 Cadmium 0.1000 0.099 99.4 Chromium 0.1000 0.10 101 Cobalt 0.1000 0.10 104 Copper 0.1000 0.10 103 Lead 0.1000 0.101 103 Manganese 0.1000 0.10 102 Molybdenum 0.1000 0.097 96.7 Nickel 0.1000 0.10 102 Selenium 0.5000 0.51 101 Silver 0.1000 0.10 103 Thallium 0.1000 0-101 101 Vanadium 0.1000 0,101 101 Zinc 0.1000 0,101 102 Sample Spiked: 20120831-03A RunID: 49368 SegNo 1187288 Units: mglKg Analysis Dale: 1213OM20 1 48:08 AM Analyst: KL Analyte Sample MS MS MS% MSI7 MSD MSD% RPD RPD Low High Qual Result Spike Result Recovery Spike Result Recovery Limit Limit Limit Added Added Antimony 0 100.0 120 121 100.0 110 108 11.4 20 70 130 Arsenic 7.439 100.0 130 119 100.0 120 108 B.90 2D 70 130 Barium 74.91 100.01 210 1321 100.0 190 113 9.69 20 70 130 S Beryllium 0 100.0 12D 125 100.0 110 114 6.99 20 70 130 Cadmium 1.268 100.0 12D 117 100.0 110 106 10.1 20 70 130 Chromium 8.858 100.0 14D 130 100.0 120 110 15.5 20 70 130 Cobalt 1.068 100.D 130 127 100.0 120 115 9.38 20 70 130 Copper 200.5 100.0 330 130 100.0 310 110 6.18 2D 70 130 Lead 3.398 100.0 120 117 100.0 1101 107 8.61 2D 701 130 Manganese 69.90 100.0 210 137 100.0 190 117 10.0 20 70 130 Molybdenum 4.910 100.0 120 120 100.0 120 110 8.19 20 70 130 Nickel 5.011 100.0 130 130 100.0 110 110 16.1 20 70 130 Selenium 0 500.D 570 115 500.0 520 104 9.47 20 70 130 Silver 1.101 10.001 14 127 10.00 12 113 10.6 20 70 130 Thallium 0 100.0 120 119 100.0 1101 1091 &811 20 701 130 Vanadium 5256 100.0 140 132 100.0 1201 112 15.4 20 701 1301 S Zinc 4092 100.0 580 169 100.0 5201 1061 11.51 20 70 130 S Revision vl Page 1 1 of 17 Nlht til:itc I.�jbs-Reno Quality Control Report AA SilverState 11351:imincialHlvd Analytical Laboratories Reno.Nv 897o2 WOW: 2012u831 0 Sierra Environmental Monitoring (775)857-244111 FAX:(888)398-70112 1 J712021 www.ssalabs.com Analysis: Metals 200.7 Method: F.PA 200.7 Batch ID: R49376 Method Blank RunlD: 49376 SegNo 1187582 Units mg1L Analysis Date: 12/30/2020 10:30:53 AM Analyst: KL Analyse Result Rep Limit Rep Qual Aluminum c 0.050 0.050 Calcium <0.50 0.50 Iron c 0.050 0.050 Magnesium c 0.50 0.50 Potassium I <0.50 0.50 Podium I =0,501 0.50 Revision v l Page 12 of 17 Ode Q hiltirr State Lahti-Henn Quality Control Report $I Ive 1 de 1135 1 i��nncinl Blvd iI Analytical Laboratories Itene,N% M9502 WO#: 20120831 Slerra Environmental Monitoring (775)857-2400 FAX:(838)398-7002 1/7/2021 www.ssalahs.cnm Method Blank RunID: 49376 SegNo 1187583 Units: mg1L Analysis Date: 12/30/2020 10.33.02 AM Analyst: KL Analyte Result Rep Limit Rep Qual Aluminum 0.050 0.050 Calcium c 0.50 0.50 Iran c 0.050 0.050 Magnesium a 0.50 0.50 Potassium I a 0.50 0.50 Sodium I a 0,501 0.50 Laboratory Control Sample(LCS] RunlD: 49376 SegNo 1187700 Units: mg1L Analysis Date: 12/30/2020 9:28:19 AM 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 Aluminum 6.000 6.2 104 Calcium 30.00 30 100 Iran 6.000 6.31 105 Magnesium 30.00 301 101 Potassium 30.00 31 104 Sodium 30.00 311 102 Matrix Spike IMS}1 Matrix Spike Duplicate(MSDI Sample Spiked: 20120791-10B RunID: 49376 SegNo 1187596 Units: mg1L Analysis Date: 12/30/2020 11:01:04 AM 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 Aluminum 0.02465 5.000 4.7 94.1 5.000 4.9 97.6 3.59 20 70 130 Calcium 78.39 20.00 93 74.0 20.00 94 76.0 0.424 20 70 130 Iron 0 5.0001 4.71 94.51 5.000 4.91 98.3 3.96 2011 70 130 Magnesium 22.44 20.00 40 87.0 20.00 40 90.1 1.57 20 70 130 Potassium 1.808 20.00 21 96.4 20.00 22 100 3.52 20 7D 130 Sodium 48.43 20.00 68 95A 20.00 681 98.2 0.B82 2D 70 130 Analvs1s: Metals 6010-Solid Method: EPA 6010 Batch 1D: R49381 Method Blank RurlD: 49381 SegNo 1188050 Units: mglKg Analysis Date: 12/30/2020 12:59:32 PM Analyst: KL Analyte Result Rep Limit Rep Qual Aluminum <0.050 0.050 Calcium c 0.50 0.50 Iron c 0.050 0.D50 Revision vl Page 13 of 17 Q Silver S1nte Latrai-Henn Quality Control Report Si l ■r►�ro rSt at ..r 113a VinanclaI Blvd Analytical Laboratories Reno,NV 89Su2 WO#: 20120831 Sierra Environmental Monitoring (775)857-2 400 FAX:(888)3 98-70 02 1/7/2021 www.ssalabs.enm Magnesium c 0.50 0.50 Potassium c 0.50 0.50 Sodium c 0.50 0.50 Laboratory Control Sample(LCS1 RunID: 49381 SegNo 1188054 Units: mg1L Analysis Date: 12/30/2020 9:28:19 AM 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 Aluminum 6.000 6.2 104 Calcium 30.00 30 100 Iron 6.000 6.31 105 Magnesium 30.00 30 101 Potassium 30.00 31 104 Sodium 30.00 31 102 Matrix Spike iMS1 I Matrix Spike Duplicate{MSD] Sample Spiked: 20120831-03A RunID: 49381 SegNo 1187957 Units: mg/Kg Analysis Date: 12/3012020 1.12.25 PM Analyst: KL Analyte Sample MS MS MS% MSD MSD MSD 96 RPD RPD Low High Quai Result Spike Result Recovery Spike Result Recovery Limit Limit Limit Added Added Aluminum 973.7 250.D 1300 114 250.0 1300 112 0.510 20 70 130 Calcium 10670 1000 11000 82.9 1000 11000 37.3 4.05 20 70 130 S Iron 1 2028 250-01 3200 472 250.0 3100 443 2.25 20 70 130 S Magnesium 1850 10001 3500 160 1000 33001 145 4.49 20 70 130 S Potassium 38171 10001 4200 40-31 1000 3800 1.85 9.54 20 70 130 S Sodium 63421 100D 25001 11591 1000 25001 1841 2,191 20 70 130 5 Revision v I Page 14 of 17 SOUTH TAHOE PUBLIC UTILITY DI TRI T ��U CHAIN OF CUSTODY South Tahoe Public Utility District you M e Lab Sent to: Turnaround Hti 1275 Meadow Crest Drive S R � South Lake Tahoe, CA 96150 _ Standard Phone: (530543.6231 Sampler: pFAX- 4n �� y m m Other UJ - Ce•�1r, G r sty I Comments: Relinquished by: Received b�r Report MTBE to 0-5 /L.Note an detection of MTBE a 0 2 /L /I r Analyze Travel and Field Blanks only if VOCs detected in samples Signature- ` �� SignatureM Use Calif State Write-On form to report results of Potable Water Wells Print •Vctii Af ca- Print Company South Taho Puub^blic Wlity District Company Please Return all STPUD ice chests & Blue Ice. Date: _ - ✓ Time Date: Time Relinqu shed by Received by/ Received intact Signature i, Signature ! _ Received cold ( Print Print Company! Company Custody seals Date: Time U Time Date: Correct container \Lab\FormsZhatn of CustodyAoc Page of L l JO 91 a'9ed . ,9 ; South Tahoe public Utility District 1275 Meadow Cr-ct Drive•5auth Lake Tahoe•CP,96150-7401 f hone 5350 544-6.}-72-•Fax 530 541-0614•www.5tpud.uF Tuesday, December 15, 2020 Sierra Environmental Monitoring 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 you fellow Lab Folk. _Dan Arce I Laboratory Director ❑:\LablrormslPriority_Pollutants-Centrifuge_CakelPriarityPollutantMetals-5EM doc SV + +Q Silver State I.xbs-Reno Definitions & Qualifiers i l ■ erS 1 a A V 1135 I inanri:r1131vd X Analytical I-alaoratorles Reno,NV 8'9502 W04: 201211831 Sierra Environmental Monitaring (775)857-2400 FAV(888)398-7002 ❑atci 1/7/2021 W WW.ssalahs.Ca m Definitions: LCS: Laboratory Control Samplc;prepared by adding a known mass of target analytes to a specified amount of de-ionised water and prepared with the batch of samples, used to calculate Accuracy(%REC). I.CSD: 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. Qual ifiers: *-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, C-Calibration blank analyte detected above PQL. H-Sample analyzed beyond holding time for this parameter. 1-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 vi Page 17 of 17 ENVIRONMENTAL - AilalvItical Chemists January 5, 2021 South Tahoe Public Utility District Lab ID : SP 2017388 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 Date FGL Lab ID# Matrix Sampled Received WW-05 Final Grab 12/14/2020 12/16/2020 SP 2017388-001 WW WW-06 Raw Grab 12/14/2020 12/16/2020 SP 2017388-002 WW WW-01 Raw Influent 12/14/2020 12/16/2020 SP 2017388-003 WW W W-04 Fianl Efflitenl 1 12/14/2020 1 12/16/2020 L SP 2017388-004 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 5U3U13 12/17/2020:214999 All preparation quality controls are within established criteria(performed at FGL-SP ELAP# 1573). 12/17/2020:214798 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: 320 LCS not within Acceptance Range(AR).Data was accepted based on the BSIBSD recovery. 12/24/2020:220480 All analysis quality controls are within established criteria,except: 608/8081 The following note applies to Tctrachloro-m-xylene: 362 Surrogates are qualified on Control Chan Limits, these are CCV limits. See individual sample reports. Page 1 of 30 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E Linda 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:(605)392-2000 TEL:(209)942-01B2 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(505)525-41721Ag FAX:(BD5)3W-2063 FAX:(209)942-0423 FAk(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 2310 January 5, 2021 Lab ID : SP 2017388 South Tahoe Public Utility District Customer : 2-1 1369 Organic QC 608/8081 12/24/2020:220572 All analysis quality controls arc within cstablishcd criteria. 12/30/2020:220657 All analysis quality controls arc within established criteria. 12/29/2020:220677 All analysis quality controls are within established critcria,except: 625,1 The following note applies to 4,6-Dinitro-o-cresol; 360 CCV above Acceptance Range(AR). Samples which were non detect for this analyte were accepted. 12/3 1/2020:22074 1. All analysis quality controls are within established critcria,except: The following note applies to Butylbenzylphthalatc,bis(2-1 thylhcxyl)phthalate,Di-n-octylphthalate: 360 CCV above Acceptance Rang(AR). Samples which were non detect for this anal to were acce led. 01/02/2021:220758 All analysis quality controls are within established critcria. 12/21/2020:214929 All preparation quality controls are within established critcria(performed at FGL-SP ELAN 1573),except: The following note applies to Benzidinc: 320 LCS not within Acceptance Range(AR).Data was accepted based on the BSIBSD recovery. 12/17/2020:220359 All analysis quality controls are within established criteria,except: 8260B The following note applies to 2-Hexanone,Acrylonitrile,Methyl tert-Butyl Ether: 360 CCV above Acceptance Range(AR). Samples which were non detect for this analyte were accepted. 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:DMB NtI dN up-J b�U.n id Cea 13 A,M 13.4 Approved By David Terx,B.A.,M.B.A. 1. Page 2 of 30 ENVIRONMEN-Ml- Ancj1vti(-cjI Chemists January 5, 2021 Lab ID : SP 2017388-001 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : December 14,2020-09:50 South Lake Tahoe, CA 96150 Sampled By : OPSILDSIKU Received On : December 16, 2020-12:16 Matrix : Waste Water Description : WW-05 Final Grab Project : EPA Priority Pollutants AG75251 Sample Result-Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/lD Method DatellD EPA 8260 4-Bromofluorcbenzene# 97.5 81-112 % 50303 1211TM214998 8260B 12117120:220358 Dibromofluoromcthancl. 96.9 67-133 % 5030B 12117;20:214999 8260B 12;170)220358 1,2-Dichloroethane-d4' 100 70-129 % 503OR 12117;20214998 P60B 17/17120:220358 Toluene-d8$ 99.6 71-119 % 503DB 12117i20:214999 8260B 12117120:220358 Acetone ND 50 ugll. 5030R 1-)11T20214999 8260B 13/17120:220358 Acrolein ND 50 ug/L 50306 1211720214998 826013 12i11120:220358 Acrylonitrile ND 50 ug/L 5030B 12117/20214999 826013 12117120:220358 Benzene ND 0.5 ug/L 50301) 12117/20:214998 8260B 12i17120:220358 Bromobenzene ND 0.5 ug/L 50301) 12i17/20:214999 8260B 12.17120:220358 Bromochloromethane ND 0.5 ug/L 503D11 12117/20:214999 8760B 12/17120:220358 Bronrodichlorcimcthanc ND 0.5 ug/L 50309 1 211 71202 1 49" 8MOB VYI7i20:220358 Bromofornl ND 2 ug/L 5030B 12+17/20:214998 8260B 12/17120:220358 Bromolnethane ND 0.5 ug/L 5030B IJ17/20:214998 8260B 12/17120:220358 tent-Butanol ND 5 ug/L 5030B 12117120:214998 8260B 12/17120:220358 2-Butanone(MEK) ND 10 ug/L 5030E 12i17120214998 8260B 12/1720:220358 n-Butylbcnzene ND 0.5 ug/L 50303 1.2117i20214998 8200E I2 1 7/20 2203 5 8 sec-Butylbenzene ND 0.5 ug/L 5030E 12117i20:2149" 8260E 12.1 7/20 2203 5 8 tcrt-Butylbenzcnc ND 0.5 ug/L 5030B 12/17120:214998 82608 12i 1 7/20 2203 5 8 Carbon Disulfide ND 10 ug/L 5030E 12117i2021499H 8260B 12/17/20:220358 Carbon Tetrachloride ND 1 ug/L 5030B 12117120214998 8260B 12117i20 220358 Chlorobenzene ND 0.5 ug/L 5030B 12;17170214998 8260B 12/17120:220358 Chloroethane ND 1 ug/L 5030B 17/17'20:214998 8260B 12/17120:220358 Chloroform 1 l ug/L 5030B 12/1T20:714998 82606 12117120:220358 Chloromethane ND 0.5 ug/L 5030B 12/17120:21,1998 9260B 1217120:220358 2-Chlorotoluene ND 0.5 ug/L 5030B 12117120:214998 8260B 1211720220358 4-Chlorotoluene ND 0.5 ug/L 5030B 12117i20:214998 8260B 12n7r20220358 Dibromochloromethane ND 2 ug/L 5030B 12117i20:214998 8260B 12117120:220358 Dibromomethane ND 0.5 ug/L 5030B 12.117i20:214998 8260B 12117120:220358 1,2-Dichlorobenzene ND 0.5 ug/L 50303 12117120:214998 8260E II'l7/20 2 7 03 5 8 1,3-❑ichlorobenzene ND 0.5 ug/L 50303 12•'17120:21499R 826M 12•'l720220358 1,4-❑ichlorobenzene ND 0.5 ug/L 503013 12;1T20:214998 82608 1Z'17120:220358 Dichlorodifluoro)nethane ND 0.5 ug/L 5030B 1211720:214998 9260B 12'17120:220358 1,1-Dichloroethanc ND 0.5 ug/L 503013 017/20:214998 92603 12i17i20:220358 1,2-Dichloroethane ND 0.5 ug/L 503013 12'1720:214998 92603 12117i2o:220358 1,1-Diellloroethylene ND 0.5 1 ug/L 5030B 12117;20:214998 82608 12117/20:220358 Pagc 3 of 30 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 653 Corporation Street 2500 Stagecoach Road 563 E -indo 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-o182 TEL:(530)343-5816 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172 1 Ag FAX:{B051392-2063 FAX:(209)942-042s FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No 1573 CA FLAP Certification No 1563 CA ELAP Certification No 2670 CA ELAP Certification No 2775 CA ELAP Certification No 2510 January 5, 2021 Lab ID : Sf 2017388-001 Description : WW-05 Final Grab Customer ID 2-11369 Sample Result-Organic Constituent Result PQI. Units Note Sample Preparation Sample Analysis iVlethed Datc/1D I Method Date/ID EPA 8260 cis-1,2-Dichloroethylene ND 0.5 ug/L 5030B IDI1 2021499N K260B 11117120220358 trans-1,2-Dichloroethylene ND 0.5 ug/L 5030B 12117120;21499N 8260B 121171 O-2)0358 1,2-Dichloropropane N❑ 0.5 ug/L 5030B I Y17P021490. 8260B 1211W20:210358 1,3-Dichloropropane N❑ 0.5 ug/L 5030B 12117/20:114998 8260B 12117/20:220358 2,2-Dichloropropane ND 0.5 ug/L 5030B 12117/20:214998 8260B 12117/z0220358 1,1-Dichloropropene ND 0.5 ug/L 5030B 12117120:214998 9260F3 17117/70220-',59 1,3-Dichloropropene(`I ota1) ND -- ug/L 50305 12117i20:21499N 8260F3 1 211 7 00 22 03 5 9 cis-1,3-Dichloropropene ND 0.5 ug/L 5030B 12117;20;214998 8260B 1211720220359 trans-l,3-Dichloropropene ND 0.5 ug/L 50.30B I2/17120214998 8260B 1 21 1 7 20 27(1359 Di-isopropyl ether(DIPS) ND 5 ug/L 5030B 12117/20:214998 8260B 1211W2u220359 Ethyl Benzene ND 0.5 ug/l. 5030B 12,IWN:21499N 8260B 12117i20:220359 Ethyl tent-butyl ether N❑ 2 ug/L 5030B 12117i20:214998 8260B 12117120;220359 (ETBE) Hexachlorobutadiene N❑ 5 ug/L 5030E 12+1720:214998 8260B 12117/20:220358 2-Hexanone N❑ 10 ug/L 503013 1211712U?14998 92605 12117/20:220358 isopropylbenzcne N❑ 0.5 ug/L 503U13 12117;20:214998 9260B 12117/20:220359 p-Isopropyltoluene N❑ 0.5 ug/L 5030B 12117/20:214998 8260B 12117120:220359 Methyl tert-butyl ether (MTBI;) ND 2 ug/L 5030B 1 zi 17+'20:214998 8260a 1 2+17120:220358 4-M ethy 1-2-pe ntan o n e (MIBK) ND 10 ug/L 5030n 1 211 7120 2 1 4998 9260B 1211712022035K Methylene C:hloridc N❑ 5 ug/L 503UB 12/17120214998 8260E 12117/20:220358 Naphthalene N❑ 5 ug/L 5030E 12/17/20:214998 9260B 12117/20;220359 n-Propylbcnzene N❑ 0.5 ug/L 5030B 12/17/20:214998 9260B 12117/20;220359 Styrene ND 0.5 ug/L 5030B 12/1700:z14998 8260B 12117l20:220359 tent-Amyl methyl ether N❑ 5 ug/L 5030B 12117/20:214998 9260B 12117/20:220358 (TAME) 1,1,1,2-Tetrachloroethane N❑ 0.5 ug/L 5030B 12/17'20:214998 826UB 12117120220359 1,1,2,2-Tetrachloroethane N❑ 0.5 ug/L 5030B 12/17130:214998 8260B 2117/20:220358 Tetrachloroethylene N❑ 0.5 ug/L 5030B 12/17120214998 9260B 12117/20:220358 Toluene N❑ 0.5 ug/L 5030B 12117120:214999 9260D 12n7/20:22D359 1,2,3-Trichlombenzene N❑ 5 ug/L 5030B 12117120:214998 9260D 12117/20:220359 1,2,4-Trichlorobenzene N❑ 5 ug/L 503UB 12J17120214998 92603 12117/20:220358 1,1,1-Trichloroethane N❑ 0.5 ug/L 5030B 12117120:214999 9260D 12117/20:22D359 1,1,2-Trichloroethane N❑ 0.5 ug/L 5030B 1 2/1 712 02 1r1999 826013 1211720:220358 Trichloroethylene N❑ 0.5 ug/L 5030B IV1T20214999 8260u I D 17/20:2103 5 9 Trichlorol]uoromethane N❑ 1 ug/L 5030B 12/1720214998 8260B I2117120:220359 1,2,4-Trimethylbenzene ND 0.5 ug/L 5030B 12J17CO214999 8260B 1 2117120 2203 58 1,3,5-Tr ime thy Ibcnzene ND 0.5 ug/L 5030n 12.117120214999 8260B 12117/20220358 Vinyl Acetate ND 10 uVL 5030n 1211T2O1214999 8260B 17117/20:22035K Vinyl Chloride ND 0.5 ug/L 5030D 12/17:20:214998 8260B 12/17:20:220359 x lenes I ND -- ug/L I 5030E 12'17120:214998 8260n 12/17/20;220358 Page 4 of 30 January 5, 2021 Lab ID : SP 2017388-001 Description : W W-05 Final Grab Customer ID 2-11369 Sample Result-Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Datel[D Method Date/ID [EPA M260 lm,g 21 71120:220358cncs ND 2 uglL 5o3oB �1l17120:214998 82G03 lencs a ND 2 U L 5030B 27/20:24998 8260B 2,1720:220358 ND-Non-DetectLA.PQL Practical Qv;intitanon Lnut.ISurrogate.*PQL adjusted for dilution. Page 5 of 30 ENVIRONMENTAL ACJRICULTURAL January 5, 2021 Lab ID : SP 2017388-002 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On ; December 14, 202040:01 South Lake Tahoe, CA 96.150 Sampled By : OPS/LDS/KU Received On : December 16, 2020-12:16 Matrix : Waste Water Description : W W-06 Raw Grab Project : EPA Priority Pollutants AG75252 Sample Result-Organic Constituent Result PQL Units Note Samplc Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 4-Brotnofluorobenzenell 101 81-112 1/1t) 5030B 121720:214998 8260B 12/17120:220358 Dibromolluoromethanel 102 67-133 % 5030B 12117120:214998 8260B 12117120:220358 1,2-Dichloroethane-d4+* 100 70-129 % 5030B 12117:20:214999 82608 12117120:270358 Toluene-d8� 104 71-119 % 5030B YM20:214999 8260B 12117120:220358 Acetone 50 50 ug/L 5030E 121M20:214999 82608 IJ1 7120-2203 5 8 Acrolein ND 50 ug/L 503OR 1211712I17214998 8260B 12;1712u:220358 Acrylonitrile ND 50 ug/L 503UR 12117;20:214999 8260B 12/17120:220358 Benzene ND 0.5 ug1I, 5030H 12/17!20:214998 8260B 12;17120:220358 Bromobenzcne ND 0.5 ug11. 5030B 12117.120214998 8260B 12/17120:220358 Bromochloromethane ND 0.5 ug/L 503013 12;17120:214998 8260f3 12 1720;220358 Bromodichloromethane ND 0.5 ug/L 503013 12/17120:214998 8260f3 12117/20220358 Bromoform ND 2 ug/L 5030B 12/17120:214998 8260B 12`17,20220358 Bromomcthanc ND 0.5 ug/L 50303 12117120:214998 82608 12"17,2022U358 tort-Butanol ND 5 ug/L 5030B 12/17/211214998 8260B 12117r20:220358 2-Butanone(MEK) ND 10 ug/L 5030B 12/1720:214998 82606 12117:`20:220358 n-Butylbenzene ND 0.5 ug/L 50308 12/11/20:214998 8260R 12117/20:220358 sec-Butylbenzene ND 0.5 ug/L 503013 l21[720:214998 8260R 12f17/20:220358 tert-Butylbenzene ND 0.5 ug/L 503013 13/17I30:214998 8260H 1a'1 7/20 2203 5 8 Carbon Disulfide ND 10 ug/L 5030B 12'17/20:214998 8260H 1211720;220358 Carbon Tetrachloride ND 1 ug/L 5030B I2/17/20:214998 826013 12117120-2)0358 Chlorobenzcne ND 0.5 ug/L 50306 12117/M214998 S26013 1?''1 7/20-2203 5 8 Chioroethane ND t ug/L 5030B 12117/20-214998 82601) 12117..20:220358 Chloroform ND t ug/L 50303 1211700:214998 K260B 1 211 7/20-2203 5 8 Chloromethane ND 0.5 ug/L 50306 12117/20-214998 8260B 1217120-220358 2-C:hlorotoluene ND 0.5 ug/L 5030B 12117120:214998 82603 12117120-220358 4-Chlorotoluene ND 0.5 ug/L 5030B 12117'20:214998 8260B IW1 7/20-2203 5 8 Dibromochloromethanc ND 2 ug/L 5030B 12.117120:214998 8260E IJ1 7/20-2203 5 8 Dibromomethane ND 0.5 ug/L 5030B 12117120;214999 K260B 12r1720-220358 1,2-Dichlorobenzene ND 0.5 ug/L 5030B 12117/20:214998 9260B 1211720:220358 1,3-Dichlorobenzene ND 0.5 ug/L 50MB 12117120:214998 9260B 12117120;220358 1,4-Dichlorobenzene ND 0.5 rig/L 503013 11117120-214998 9260B 12117120:220758 Dichlorodiftuorcinethanc ND U ug/L 5030E 12117120-214998 8260E 12!17/20:220358 1,I-Dichloroethane ND 0.5 ug/L 5030E 12117120:214998 8260B l21l7/20:220358 1,2-Dichloroethane ND 0.5 ug/L 5()3()B 12'17120:214998 8260B IM7/20:220358 1,1-Dichloroethylene ND 0.5 ug/L 5030H 12117+20:214998 8260B 1 211 712 0-2203 5 8 Pagc 6 of 30 Corporate Offices&Laboratory Office&Laboratory Office B Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E LindoAvenue, 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 1 AU 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 2610 January 5, 2021 Lab ID : SP 2017388-002 Description . WW-06 Raw Grab Customer ID 2-1 1369 Sample Result-Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/lD Method Date/ID EPA 8260 cis-1,2-Dichloraethylene ND 0.5 ug/L 5030H 12117;20:214998 8260B 12117120:220358 trans-1,2-Dichloroethylene ND 0.5 ug/L 5030u 12117120:214998 8260B 12117120:220358 1,2-Dicliloropropane ND 0.5 ug/L 9030B 12117;20:214998 8261H I?+17120 720358 1,3-Dichloropropene ND 0.5 ug/L 5030u 12117/20:214998 8260B 2117120:220358 2,2-Dichloropropane ND 0.5 ug/L 5030u 12117;20:214998 8260B 12117120:220358 1,1-Dichloropropene ND 0.5 ug/L 5030H 1217120:214998 8260B 12117120:220358 1,3-Dichloropropene(Total) ND -- ug/L 503013 12117/20:214998 8260B 12+17120:220358 cis-1,3-Dichloropropene ND 0.5 ug/L 5030B 12117/20:214998 8260B 12117120:220358 trans-1,3-Dichloropropene ND 0.5 ug/L 5030B 12111/20:214998 8260B 12117120:220358 Di-isopropyl ether(DIPS) ND 5 ug/L 503013 1211720:214998 8260B 12117120:220358 Ethyl Benzene 1.1 0.5 ug/L 5030E 12117/20:214998 8260B 121]7120:220358 Ethyl tort-butyl ether (ETBE) ND 2 ug/L 5030H 12117;20-214998 82608 12117'20220358 Hexachlorobutadiene ND 5 ug/L 50303 1V17/2O;21499R 8260E 12.+17120:220358 2-Hexanone ND 10 Ug/I, 503013 12117120-214998 8260B 12117120:220358 Isopropylbencene ND 0.5 ug/L 5030R 12117/20-214998 8260B 1211712U:220358 p-Isopropyltoluene ND 0.5 ug/L 5030R 12117/20:214998 82603 12117120:220358 Methyl tert-butyl ether ND 2 ug/L 5030B 12117/20:214998 8260B I2.17r2U:220358 (MTBE) 4-Methyl-2-pentanone ND 10 ug/L 503013 12117120:214998 8260H 12117/20:220358 (MI BK) Methylene Chloride ND 5 ug/L 5030B 2117120:214998 8260B 12/17.120:220358 Naphthalene ND 5 ug/L 5030R 12;17120:214998 8260B 12117120:220358 n-Propylbenzene ND 0.5 ug/L 5031R 12/17120:214998 8260B 12/17120:220358 Styrene ND 0.5 ug/L 5030B 12117120:214998 8260H 12/17120:220358 tert-Amyl methyl ether (TAME) ND 5 ug/L 5030B 13;17'20:214498 8260B 121 17120:220358 1,1,1,2-Tctraclrloroethane ND 0.5 ug/L 50303 12117'20:214998 8260H 12/17120:220358 1,1,2,2-Tetrachloroethane ND 0.5 ug/L 50303 12117120:214998 8260B 1;/17120:220358 Tetrachloroethylenc ND 0.5 ug/L 5030B 12.117120-214998 8260B 12/17/2U:220358 Toluene 3.4 0.5 ug/L 5030B 12/17120-214998 9260B 12;1720:220358 t,2,3-Trichlorobenzenc ND 5 ug/L 5030B 12/1720-214998 8260B 12/17r20:220358 1,2,4-Trlchlorobcnzenc ND 5 ug/L 5030B 1217r'20-214998 8260B 12;17;2U:220358 1,1,1-Trichlorocthane ND 0.5 ug/L 5030B 12.117/20-214998 9260B 12/17r20:220358 1,1,2-Trichloroothane ND 0.5 ug/L 5030E 12,'17;20:214998 8260E 12;1720220358 Trichloroetbylene ND 0.5 ug/L 5030B 12'17/20:214998 8260H 12;17/20220358 Trichlorofluoromethane ND 1 ug/L 5030E 12/17/20:214999 8260B I Y17/20 220358 1,2,4-Trilnothylbenzone ND 0.5 ug/L 5030E 12/17/20:21499X 8260B 12J17120-220358 1,3,5-Trimethylbenaene ND 0.5 ug/L 5030B 121720:214999 826M 12'17/20:220358 Vinyl Acetate ND 10 ug/L 5030B 12117120:214999 926013 1J1720:220359 Vinyl Chloride ND 0.5 ug/L 5030B 12117/20-214998 82603 12117/20:220358 X lenes ND ug/L I 5030H 12117/20:214998 82603 12117;20:220358 Pagc 7 of 30 January 5, 2021 Lab ID : SP 2017388-002 Description : WW-06 Raw Grab Customer ID 2-11369 Sample Result-Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID I Method ❑ate/lD EPA M260 Xylcnes m,p ND 2 uglL snsnn 2,17170- 4998 s26()U 12117,120:220358 X Icncs o ND 2 u IL 3030B 12 712M 4998 H260B 7117120270358 ND=Non-Detected.PQL=Practical Quantitation Limit.ISunogate.*PQL adjusted far dilution, Page 8 of 3Q ENVIRONMENTALFGL January 5, 2021 Lab ID : SP 2017388-003 Customer ID : 2-t 1369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : December 14, 2020-00:00 South Lake Tahoe, CA 96150 Sampled By : OPSILDSIKU Received On ; December 16, 2020-12:16 Matrix : Waste Water Description : WW-01 Raw Influent Project : EPA Priority Pollutants AG75271 Sample Result-Organic Constituent Result PQL Units Notc Sample Preparation Sample Analysis Method Date/ID Method Date/1❑ EPA 608.3 Tetrach1oro-m-x lone$ 13.8 5-124 % 608.3 12117120?14798 6081081 1J24/2 0 2204 8 0 Aldrin ND 0.05 ug/L 6083 12/17120:214798 608;081 12.'24/20220480 Alpha BBC ND 0.05 ug/L 608.3 12/17120 2 14798 608/8081 12124/20220480 Beta BHC ND 0.05 ug/L 6083 1V17120:214798 608.18081 12124/20:220480 Deita BHC ND 0.05 ug/L 608.3 12:17120:214798 608i8081 12124/20:220480 Gamma BHC(Lindane) ND 0.05 ug/L 608.3 I2'17120:214798 608/9081 12124/20:220490 Chlordane ND O,l ug/L 608.3 12117i20:214798 608/8081 12130M:220657 4,4-DDD ND 0.05 ug/L 6083 12/17;20:214798 608/9081 12124,120:720490 4,4-DDE ND 0.05 ug/L 608.3 12/17'20:214798 608/8081 12124,120:220490 4,4-DDT ND 0.05 ug/L 6083 12J1T20:714798 608/9081 12i24/20:220480 Dieldrin ND 0.05 ug/L 6083 12J17+20:714799 608/8081 12124/20:220480 Endosul Fan I ND 0,05 ug/L 608.3 12117120:214798 608/8081 12124/20:220490 Endosulfan 1I ND 0.05 ug/L 6083 121M20:2147913 608/8081 12124/20:220480 Endosulfan Sulfate ND 0.05 ug/L 608.3 12117120:214799 608;K081 12124120:220490 Endrin ND 0.05 ug/L 608.3 12i 17120:214798 608/9081 12124120:2204K0 Endrin Aldehyde ND 0.05 ug/L 608.3 l2117/20:214799 608/8081 12124.120220480 Heptachlor ND 0.05 ug/L 608.3 l2117120:214799 608/8081 12124CO220572 Heptachlor Epoxide ND 0.05 ug/L 6083 12117120:214798 608/8081 12124/20:220480 Methoxychlor ND O,l ug/L 6083 12117130:214799 608,8081 12124120:220480 Toxaphene ND 0.5 ug/L 6083 12117;20:214798 608/8081 12130120:220657 PCB,Sum ND -- ug/L 608.3 1211V20:214798 608/9081 12i30/20:220657 PCB 1016 ND 0.5 ug/L 608.3 12117:`20:214798 608/9081 12130/20:220657 PCB 1221 ND 0.5 ug/L 608.3 12.'17/20:214199 608/8081 12130120:220657 PCB 1232 ND 0,5 ug/L 6083 12117.20:214798 608/8091 12130120:220657 PCB 1242 ND 0.5 ug/L 6083 12M/20214798 608/8081 12130120:220657 PCB 1248 ND 0.5 ug/L 6083 12i 17/20:214798 608/8091 12130120:220657 PCB 1254 ND 0.5 ug/L 6083 12:17/20:214798 608/8091 12130120:220657 PCB 1260 ND 0.5 ug/L 6083 2i 17/20:214798 608/8091 12130120:220657 Endrin Ketone I ND 1 0.05 ug/L 608.3 12117`20214798 608'8081 12/2420:220480 EPA 625.1 2-Fluorobiphenyl# 57.2 20-97* % 625.1 12i21120:214928 6251 12131i20:220741 2-Fluorophenol$ 53.2 5-95* % 625.1 12.21/20:214928 625.1 12.51'20:220741 Nitrobenzene-0 78.5 15-314* % 615.1 12;21/20:214928 625.1 12/31120:220741 Phenol-d6$ 59.3 8-424* % 6251 17MM214928 625.1 12/31120:22074I -rc hen 1-d14$ 37.1 18-106* % 625.1 12/21120:214928 1 6251 1J31120,220741 Page 9 of 30 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E Linda Avenue 3442 Empresa Drive.Suite❑ 9415 W Goshen Avenue Santa Paula,CA 93060 Stockton,CA 05215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA93291 TEL:(605)392-2000 TE1-:(209)942-0182 TEL:(530)343-5618 TEL:(805)783.2940 TEL:(559)734-9473 Env FAX:(605)525-41721Ag FAX:(505)392-2063 FAX-(209)942-0423 FAX:(530)343-3807 FAX:(605)783-2912 FAX:(559)734-6435 CA ELAP Certification No 1573 CA ELAP Certification No 1583 CA ELAP Certification No 2670 CA ELAP Certification No 2775 CA ELAP Certification No 2810 January 5, 2021 Lab ID : SP 2017388-003 Description : WW-01 Raw Influent Customer ID 2-11369 Sample Result-Organic Constituent Result PQL Units Notc Sample Preparation Samplc Analysis Method Datc/M Method ❑ate111) EPA 625.1 2.4.6-Trlbrorno henoF 58.7 5-118* °fin 625.1 2121120214918 6251 12131,20210711 Acenaphthene ND 4.7* ug/L 6151 12+211202149')8 625.1 12131120:220711 Acenaphthylene ND 4.7* ug/L 625.1 12,21120:214928 425.1 1J31120:?10741 Anthracene ND 4.7* ug/L 625 1 1212112G:2149')8 625.1 12/31,20220711 BenZidine ND 9.4* ug/L 625 1 12121120:214929 4525 1 011021)1:220758 BenZo(a)anthracene ND 4.7* rlg/L 625.1 12;2112a:214929 625,1 I231120:220741 Benzo(a)pyrene ND 4.7* ug/L 6251 12121120:214928 (325.1 2,1P20:220741 Benzo(b)tluoranthene ND 4.7* ug/L 625.1 12:'2F20:214928 625.1 12'31120:220741 Ben20(g,h,i)perylene ND 4.7* ug/L 625.1 13121i20:214928 625.1 1J31120:220741 BenZO(k)fluo rant hene ND 4.7* ug/L 6251 12/2U26:214928 625.1 11'31120:220741 bis(2- ND 4.7* ug/L 625I 1212]!2I1:314929 625.1 1?131120:?2D741 Chl o ro ethoxy)methane bis(2-Chlorocthy1)cthcr Nll 4.7* ug/L 625.1 1221i207214929 6251 12J3v20:220711 b15(2-Chloro1sopropy1)cthcr ND 4.7* ug/L 625.1 12/21:20:?149'19 625.1 12•'31110:220741 bis(2-Ethylhcxyl)phthalatc ND 9.4* ug/L 625.1 12.'?Ii D:?14929 6251 12131/20:220741 4-Bron]ophenylphenylether ND 4.7* ug/L 625.1 12/21,M214928 625.1 121.11120:220741 ButylbenZylphthalate ND 9.4* ug/L 625.1 12/21120:214929 6251 12!31120:220741 4-Chloro-3-methylphenol ND 4.7* ug/L 625.1 12/21120:214929 625.1 12.'31,'2022M41 2-C.hloronaphthalene ND 4.7* ug/L 625.1 12.+21120:214928 625.1 12'310):220741 2-Chlorophenol ND 9.4* ug/L 625.1 12.91120 214928 625 1 12131!20;220741 4-Chlorophcnylphenylcther ND 4.7* ug/L 625.1 I2J21120:214928 625.1 12131;20-220741 Chrysene ND 4.7* ug/L 625.1 12'21i20:214928 625.1 1213 1 -0:220741 D1benzo(a,h)anthracene ND 4.7* ug/L 6251 12'21120:214928 625.1 12131120:220741 1,2-Dichlorobenzene ND 4.7* ug/L 625.1 12'21120:214928 625.1 12131/20:220741 1,3-Dichlorobenzene ND 4.7* ug/L 625.1 12'21120:214928 625.1 12.13112n:220741 1,4-Dichlorobenzene ND 4.7* ug/L 6251 12/2P20:21492$ 625.1 12;3 1/20 220 7 4 1 3,3'-Dichlorobenzidine ND 4.7* ugll. 625 1 I2J21r20:214928 625.1 211i2D 2207.1I 2,4-Dichlorophcnol Nll 9.4* ug/L 625,1 12M120:214928 625.1 12131,'20:220741 Dicthylphthalate ND 4.7* ug/L 625.1 I2J21120:214928 625.1 12131i2o:220741 2,4-Diinethylphcnol ND 9.4* ug/L 625.1 12121+20:214928 625.1 12131.20:220741 Dimethylphthalato ND 4.7* ug/L 625.1 121210)214978 625.1 12131;20:220711 Di-n-butylphthalate Nll 9.4* ug/L 625.1 12'2120 214928 625.1 12131.•'20:220741 4,6-Dinitro-2- ND 9.4* ug/L 625.1 12;2120;21492ii 625.1 1213 1 20 224174 1 nlCthylphL'RC11 2,4-Dinitrophenol ND 23* Ugll, 625.1 12:21.20214928 6251 1211/20:220741 2,4-Dinitrotolucnc ND 4.7* ug/L 625.1 121?1.20214928 625.1 12131!20220741 2,6-Dinitrotolucne ND 4.7* ug/L 625.1 12.121-0:214928 625.1 1213120220741 Di-n-octylphthalate ND 4.7* ug/L 625.1 1212120:214928 625.1 12i31/20:220741 1,2-Diphenylhydrazine ND 4.7* ug/L 625.1 12i21+20:214928 625.1 1213120220741 Fluoranthene ND 4.7* ug/L 1 1 6251 2.'2P'20:214928 625.1 12;3U20220741 Page 10 of 30 January 5, 2021 Lab 1D : SP 201738S-003 Description : WW-01 Raw Influent Customer ID 2-11369 Sample Result-Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method DatellD Method Datc/lD EPA 625.1 Fluorene ND 4.7* ug/L 625.1 12121120214928 625.1 12131/2a:220741 Hexachlorobenzene ND 4.7* ug/L 625.1 1212112u:?14928 625.1 12i31120:220741 Hexachlorobutadiene ND 4.7* ug/L 625.1 12121120,214918 6251 12/?1120:220741 HexachIorocyclopentadiene ND 4.7* ug/L 625.1 12121120:214928 625.1 12131120:220741 Hcxachloroethane ND 4,7* ug/L 625.1 12P11?0:7119?8 6231 12/31/20:220741 1ndcno(1,2,3-c,d)pyrene ND 4.7* ug/L 625.1 12/21120:214928 625.1 12/31120:220741 1Sophorone ND 4.7* ug/l. 625.1 12.121120:214928 625.1 1131120:220741 Naphthalene ND 4.7* ug/L 625.1 12i?11?0:21497K 625.1 12i31/20:220741 Nitrobenzene ND 4.7* ug/L 625.1 1221i2()214928 625.1 12 31120:220741 2-Nitrophenol ND 9.4* ug/L 625.1 12?10021492K 625.1 12i31/20:220741 4-Nitrophenol ND 9.4* ug/L 625.1 IJ21i20:214928 625.1 12131i20:220741 N-Nitrosodimetbylamine ND 9.4* ug/L 625.1 12.21i20214928 625.1 12/31/20:220741 N-Nitrosodi-n-propylanline ND 4.7* ug/L 625.1 1212l120,214929 625.1 12131/20:220741 N-Nitro sod 1phenylamine ND 4.7* ug/L 625.1 12121120214928 625.1 12/31i20:220741 Non-Chlorinated Phenolics ND -- ug/L 625.1 IMP20:214928 625.1 17/3IPO:220741 Pentachlorophenol ND 4.7* ug/L 625.1 IMP20:214929 625.1 12/31r20:220741 Phenanthrenc ND 4.7* ug/L 625.1 12121120:214929 6251 12i31/20220741 Phenol 25.7 4.7* ug/L 625.1 12121120:21492K 6251 12/31/20:220741 Pyrene ND 4.7* ug/L 625.1 12P1120214928 625.1 12.+31120:220741 Pyridine ND 4.7* ug/L 625.1 12121120:214928 625.1 12/31/20:220741 1,2,4-Trichlorobenzene ND 4.7* ug/L 625.1 12/2 P20:214929 625.1 12/31130:220741 2,4,6-Trichlorophenol ND 4.7* ug�L 625.1 12121i20:214928 625.1 12/31120:220741 2,4,5-Trichlora hcnol I ND 1 9.4* 1 ug/L 1 1 625.1 12/21120:214929 625.1 12/31:20220741 ND=Non-Detected.PQL=Practical Quantitation Limit,$Surrogate.*PQL adjusted for dilution. Page l 1 of 30 MAL ENVIRONMENTAL AORICULTURAL January 5, 2021 Lab I❑ : SP 2017388-004 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : December 14,2020-00:00 South Lake Tahoe, CA 96150 Sampled By : OPS/LDS/KU Received On : December 16,2020-12:16 Matrix : Waste Water Description : W W-04 Fian1 Effluent Project : EPA Priority Pollutants AG75274 Sample Result-Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method DatellD Method Date/lD EPA 608.3 Tetraehloro-m-x lenet 11.2 5-124 % 608.3 12J17120:214798 608;8081 12124:2(:220490 Aldrin ND 0.05 ug/L 608.3 12,'17120:214798 66H;8081 12,2 412 0 2 2 04H0 Alpha BHC ND 0.05 ug/L 608.3 12;17120;214799 608/8081 12.'242022049f) Beta BHC ND 0.05 ug/L 608.3 12'17120-214798 608.�8081 12124,"20220480 Delta BHC ND 0.05 ug/L 608.3 IVIT70-214798 608/8081 12/24/20-220490 Gamma BHC(Lindane) ND 0.05 ug/L 608.3 1 V17120-214798 608/8081 12/24.20:22 04 90 Chlordane ND 0.1 ug/L 608.3 12117120-214798 608/8081 12/30120:220657 4,4-❑D❑ ND 0.05 ug/L 608.3 12/17120:214798 6D818081 12124120:220480 4,4-DDE ND 0.05 ug/L 608.3 12/17120:214198 609/8081 12;24120:220490 4,4-DDT ND 0.05 ug/L 608.3 12f17120-214798 60W808J 1VW20:210490 Dieldrin ND 0.05 ug/L 608.3 12.f17n0-714798 608/8081 1Jz4120:220490 Endosulfan I ND 0.05 ug/L 608.3 12117120-214798 608/8081 12/24:'20:220490 EDdosu[fan 11 ND 0.05 ug/L 608-3 12117i20-214798 608/8081 12/2420:220490 Endosulfan Sulfate ND 0.05 ug/L 608.3 12117120:214798 609/8081 12,24120:22U18o Endrin ND 0.05 ug/L 608.3 12/17120:214798 608/8081 12,24120:22U18o Endrin Aldehyde ND 0.05 ug/L 608.3 12117i20-214798 6091"4081 12124r20:220480 Heptachlor ND 0.05 ug/L 608.3 12/17120-214798 608/8081 12124r20:220572 Heptachlor Epoxide ND 0.05 ug/L 608.3 12/17120-214798 608/8081 12/24120-220480 Mothoxychlor N❑ 0.1 ug/L 608.3 12/1700-214798 608/8081 12/24120IM480 Toxaphene N❑ 0.5 ug/L 608.3 1211700-214798 6091808I 12130120-720657 PCB,Sum N❑ -- ug/L 608.3 12.'17120-214798 608/8081 12130120:220657 PCB 1016 N❑ 0.5 ug/L 608.3 12.117120:214799 60818081 12130120:220657 PCB 1221 N❑ 0.5 ug/L 60H-3 1J17120-214798 608i8081 12/30120:220657 PCB 1232 N❑ 0.5 ug/L 6083 12.17120-214798 608i8081 12130120:220657 PCB 1242 N❑ 0.5 ug/L 608.3 11'17120-214798 608+8081 12/30120-220657 PCB 1248 N❑ 0.5 ug/L 608.3 17.'17C0-214798 608/8081 12130.'20-220657 PCB 1254 N❑ 0.5 ug/L 608.3 1J17C0-214798 6091&081 12130120-220657 PCB 1260 N❑ 0.5 ug/L 608.3 12117120-214798 608/8081 12130120-220657 Endrin Ketone ND 0A5 ug/L 608.3 12;17C0-214798 608/8091 12121-20-220480 EPA 625.1 2-F'luorobiphenyl$ 42.3 20-97* % 625.1 12121i20:21492a 625.1 12129,20:220677 2-Fluorophenol# 19.5 5-95* % 625.1 IMP20:214928 625.1 12129120:220677 Nitrobenzene-d5' 53.6 15-314* % 625.1 12/21!?0-?14928 625.1 12.29,10-220677 Phenol-d6° 29,1 8-424* % 625.1 12121120-214928 625 1 12i29120-220677 -Te hen 1-d14` 32.8 18-106 1 % 625.1 12/21i20:214928 625.1 1212Wr 0-220677 Page 12 of 30 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory B53 Corporation Street 2500 Stagecoach Road 563 E Linda Avenue 3442 Empresa Drive,Suite❑ 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)525.41721Ag 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 January 5, 2021 Lab ID : SP 2017388-004 Description : WW-04 Fianl Effluent Customer ID 2-11369 Sample Result-Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Mcthod Datc/ID Method Date/ID EPA 625.1 2,4,6-Tribromrl henolr 25.3 5-118* % 625.1 DII120:2149)8 625.1 1109120:220677 Acenaphthene ND 1,9* ug/L 625.1 12121120:2149)8 625 1 12121120-?20677 Acenaphthylene ND 1,9* ug/L 625.1 I2!21!20:21492R 625.1 121NIM220677 Anthracene ND l.9* ug/L 625.1 1DIII0:21491k 625.1 12129120-220677 Benzidine ND 3.7* ug/L r25.1 12121120:214929 625.1 1212912:220677 Benzo(a)anthracene N❑ 1.9* ug/L 625.1 1J21120:2149')9 6251 12129120-220677 Benzo(a)pyrene N❑ 1.9* ug/L 625.1 12'21120:21492s 625.1 12129/20-220677 Benzo(b)Ouoranthene ND 1.9* ug/L 625.1 12!21i20:214929 625.1 1212W10-220677 Benzo(g,h,i)perylene N❑ 1.9* ug/L 625.1 12!21.i20:214929 625.1 12129120-220677 Benzo(k)fluoranthene N❑ 1,9* ug/L 625.1 12121i20-214918 625.1 2129/20-220677 bis(2- Chloroethoxy)methane ND 1.9* ug/L 625.1 12121130:314928 625.1 12129'20:220677 bis(2-Chloroethyl)ether ND 1.9* ug/L 625.1 1212U20-21492# 625.1 1?129/20-220677 bis(2-C'hloroisopropyl)ether ND 1.9* ug/L 625.1 12121120-214928 625.1 12124.•20-220677 bis(2-Ethylhcxyl)phthalate ND 3.7* ug/L 625.1 12121120-214928 625.1 12129�-20-220677 4-Bromophenylphenylcthcr ND 1.9* ug/L 625.1 1212 1/2 0:2 14928 625.1 12129/20:220677 Butylbenzylphthalate N❑ 3.7* ug/L 625.1 1121/20:214928 625.1 12129/20:220677 4-Chloro-3-i-nethylphenol N❑ 1,9* ug/I, 625.1 12,21i20:214928 625.1 12129,20:220677 2-Chloronaphthalene N❑ 1.9* ug/L 625.1 12121/20-214928 625.1 12123;20:220677 2-Chlorophenol ND 3.7* ug/L 625.1 12121P0-?14928 625.1 1212W20220677 4-Chlorophenylphenyicthcr ND 1.9* ug/L 625.1 12121120-?14928 625.1 12129120-220677 Chrysene ND 1.9* ug/L 625.1 1121/20:214928 625.1 12r29/20:220677 Dibetizo(a,h)anthracene ND 1.9* Ag/L 625.! 12121/20:214928 625.1 12129/20:220677 1,2-Dichlorobenzene ND 1.9* ug/L 625.1 1212120:214928 6251 12129120:220677 1,3-Di6,lllorobenzene ND 1,9* ug/L 625.1 1I121;20:214928 625.1 12129..20:220677 1,4-Dichlorobenzene ND 1,9* ug/L 625.1 12121/20-214928 625.1 1212900220677 3,3'-Dichlorobenzidinc ND 1.9* ug/L 625.1 1212112I1-214928 6251 12.12 9/20 2206 7 7 2,4-Dichlorophenol ND 3.7* ug/L 625.1 12.'21120-214928 625.1 12i29,10:220677 Dicthylphthalatc ND 1.9* ug/L 625.1 12121!20-2149?8 625.1 IM9.20-220677 2,4-Dimcthylphenol ND 3.7* ug/L 625.1 12i21/20-214928 625.1 1''29120:220677 Dimcthylphthalatc ND 1.9* ug/L 625.1 12i21120-2J4978 625.1 12.21),20-220677 Di-n-butylphthalate N❑ 3.7* ug/L 625.1 12121120-214928 625.1 12!29.20:220677 4,6-Dinitro-2- ND 3.7* ug/L 625.1 12121120-2149?8 625.1 12.29,20220677 mcthylphcno l 2,4-Dinitrophcnol ND 9.4* ug/L 625.1 12121/20-214928 6251 12129120:220677 2,4-Dinitrotoluene ND 1.9* ug/L 625.1 1212120-214928 625.1 IM9120:2?0677 2,6-Dinitrotoluene ND 1.9* ug/L 625.1 12i211211-214929 6251 12l29120:220677 Di-n-octylphthalate ND 1.9* ug/I, 625.1 121211211-214928 625.1 12!29120:220677 1,2-DiphenyIhydrazlne N❑ 1.9* ug/L 625.1 12i211211;214918 625.1 12129120:220677 Fluoranthene I ND 1.9* ug/L 1 1 625.1 12!21/20:214928 625.1 1229120:220677 Page 13 of 30 January 5, 2021 Lab ID : SP 2017388-004 Description : WW-04 Fianl Effluent Customer ID 2-11369 Sample Result-Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method DateliD Method Date/ID EPA 625.1 1'luorene ND 1.9* ug/L 625.1 12121120214928 625.1 121291-'0:220677 Hexachlorobenzcne ND 1.9* ug/L 625.1 12121120214918 625.1 12129120:220677 Hcxachlorobutadiene ND 1.9* ug/L 625.1 12121120214928 6251 12129i20:220677 Hexachlorocyclopcntadicnc ND 1.9* uglL e25,1 12121120214928 6251 1J29120:2211617 Hexachloroethane ND 1.9* ug/L 025.1 12121/20214928 6251 2r29120:220677 Inde no(1,2,3-c,d)pyrene ND 1.9* ug/L 625.1 12.+21120:214928 625.1 2129120:22007 Isophorone ND 1,9* ug/L 625.1 11121120214928 625.1 12291202217677 NaphthalCDC N D 1.9* ug/L 625.1 12i?U20214928 625.1 12!29.+20:220677 Nitrobenzene ND 1.9* ug/L 625.1 1212U20214928 625.1 12i29120:220677 2-Nitrophenol ND 3.7* ug/L 625.1 12121i20-714928 625.1 12129120:220677 4-Nltrophenol ND 3.7* ug/L 625.1 12121,20214928 625.! 12i29120:270677 N-Nitrosodimethylamine ND 3.7* ug/L 625.1 12i21i20214928 625.1 11'29120:270677 N-Nitrosodi-n-propylamine ND 1.9* ug/L 625.1 12.'21/20214928 6251 12129120:220677 N-Nitrosodiphenylamine ND 1.9* ug/L 625.1 1212112U14928 625.1 12J29!20:220677 Non-Chlorinated Phenolics ND -- ug/L 625.1 2121120:214928 625.1 12129120:220677 Pentachlorophenol ND 1.9* ug/L 625.1 2121120:214928 625.1 12J29120iM677 Phenanthrene ND 1.9* ug/L 625.1 17121/20:214928 625.1 12r29120:220677 Phenol ND 1.9* ug/L 625.1 12121/20:214978 625.1 12i29120:22(M77 Pyrene N❑ 1.9* ug/L 625.1 12i2U20214928 625.1 12129120220677 Pyridine ND 1.9* ug/L 625.1 12121i20:214928 625.1 12/29120:220677 1,2,4-Trichlorobenzcne ND 1.9* ug/L 625.1 12121120:214928 625.1 12129120:220677 2,4,6-Trichlorophenol ND 1.9* ug/L 625.1 2121120:214928 625.1 12/29120:220677 2,4,5-TrichIoro henoi I ND 1 3.7* 1 ug/L 1 625.1 12121/20:214928 625.1 12129120:220677 ND-Non-Detected.PQL-Praetieal Quautitalion Limit.:Surrogate.•PQL adjusted f'or dilution. Page 14 of 30 ENVIRONMENTAL January 5, 2021 Lab ID : SP 2017388 South Tahoe Public Utility District Customer : 2-11369 Quality Control-Organic Constituent Method Datelll) 7 ype Units Conc. QC Data DQO Note Organic 1,1,1,2-Tctrachlorocthanc 50306 12/17/20:214998AW Blank u.'L ND <0.5 1,I,I-Frlchloto ethane(TC.A) 5030B 12117120:214998VRG Blank u IL ND <U.5 I.!2.2-Tctrachlorocthanc 503013 12117i20214998VRG Blank u IL ND <0.5 L1.2-Trichloroethane 5030E 12/17/20:214998VRG Blank a /L ND <0.5 1,I-Dichloroethane 503013 12117120:214998VRG Blank uz/L IN <0.5 1,1-Dichloroclhy[one 5030B l21]7120:214998VRG Blank uglL ND <0.5 LCS uglL 25.00 88.1% 52-137 MS ugll 25,00 106% 25-179 (SP 2017388-001) MSD uglL 25.00 100 1% 25-179 MSRI'l) I u L 25,00 6.3°/ 1 �26 l,I-Dichloro ro ene 50303 1V17!20214999VRG Blank tt L ND <0.5 1.2.3-Tr ichlorobencene 5030B 12/17/20:214999VRG Blank u ;L ND c5 1.2.4-T rich lorobenzene 503013 12!17/20:214998VRG Blank u L ND c5 1.2.4-Tri met lt lbenzenc 50303 12!17120:214998VItG Blank tt IL N❑ <0.5 1,2-Dichlorobenzene 5030B 12/17/20:214999VRG Blank u L NI) <0.5 1,2-Dichloroethane(EDC) 5030E 12117!20:214998VRG Blank u L ND <0.5 1,2-Dichloroethane-d4 503013 12117120:214998VRG Blank uglL 25.00 99.6OM� 70-129 LCS uglL 25.00 99.2% 70-129 MS uglL 25.00 105% 70-129 (SP 2017388-001) MSD ttglL 25.00 102 IMP 70-129 MSRPD u L 25.00 2.8% <-20.0 1,24Dichktro mrane 5030B 12/17/20:214998VRG Blank u L ND <0.5 1,3,5-Trimeth (benzene 503013 12/17/20-214998VRG Blank u L ND <0.5 1,3-Dichlorobenzene 50303 12!17120:214998VRG Blank tt IL ND <0.5 13-Dichloro ro ane 5030E 12/17/20:214998VRG Blank u L ND c0.5 1,4-Dichlorobenzene 5030B 12/17/20:214998VRG Blank u IL ND <0.5 2.2-Dichloropropane 5030E 12117120:214998VRG Blank u L ND <0.5 Butanone MEK) 503013 12/17/20:214998VR6 Blank u IL ND <10 Chlormoluene 5030B 12/17/20:214998VRG Blank u L ND c0.5 -f Iexanone 50303 12/17/20-214998VRG Blank u IL ND <10 Bromotluorobenzene 50303 12!17/20:214998VIZG Blank ttglL 25.00 102% 81-112 LCS uglL 25.00 97.7% 81-112 MS ttglL 25.00 96.7% 0-200 (SP 2017388-001) MSD ttgll 25.00 99.2% 0-200 MSRPD I u L 25.00 2.6% <20.0 -Chlomtoluene 5030E 12/17/20:214998VRG Blank u IL ND <0.5 Meth 1-2- entanone(MIM 5030E 12/17/20:214998VRG Blank tt IL ND �10 cetune 5030B 12117120:214998VRG BIank u IL ND <50 crolein 5030E 12117/20:214998VRG Blank u !L ND <50 lonirrilc 5030E 12!17r20:214998VRG Blank u=IL ND <50 Beit7ene 5030E 12117120:214998VRG Blank uglL ND <0.5 LCS uglL 25.00 109% 60-134 MS ugrL 25.00 l l6% 47-169 (SP 2017389-001) MSD uglL 25.00 I IU% 47-169 MSRPD u IL 25.00 1 4.7% 524 Bromobcnzenc 5030B 12!17/20:214999VKG Blank a=IL ND <0.5 13 rornochlorometh ail e 5030E 12/17/20:214998VRG Blank u IL ND <U.5 Bromodichloromethanc 5030B 12/17/20:214998VRG Blank u !L ND <0.5 romoform 5030B 12/17/20:214999VRG Blank ug/L ND 4 romemethanc(Mcth l Bromide) 50303 12/17/20214998VRG Blank u IL ND Q7.5 arhoit Disulfide 50305 12/17120:214998VRG Blatik u IL ND <10 Carbon Tetrachloride 5030B 12,!17/20214998V12G Blank u IL N❑ <l hlorobenzcne 5030E 12/17/20:214998VRG Blank uglL N11 0.5 LCS riglL 25.00 ]15'No 56-152 MS I u /L 1 25.00 ]21 % 31-212 Corporate Offices&Laboratory Offlca&Laboratory Office d Laboratory Office&Laboratory Office&Laboratory B53 Corporation Street 2500 Stagecoach Road 563E LindoAvenue 3442 Empresa Drive,Suite❑ 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(B05)392-2000 TEL.(209)942-0162 TEL:(530)343-5819 TEL:(605)763-2940 TEL:(559)734-9473 Env FAX:(805)525.41721Ag FAX:(605)392-2063 FAX:(209)942-0423 FAX:(530)343.3807 FAX:(905)7B3-2912 FAX:(559)734-6435 CA ELAP Certification No 1573 CA ELAP Certification No 1563 CA ELAP Certification No 2670 CA ELAP Certification No 2775 CA ELAP Cerrification No 2810 January 5, 2021 Lab ID : SP 2017388 South Tahoe Public Utility District Customer : 2-1 1369 Quality Control- Organic Constituent Method Date11D Type Units Cone. QC Data DQ❑ Note Organic hlorobenrene 5030B (SP2017388-001) MSD uglL 25.00 III % 31-212 MSRPD u I. 25.(R) 4,]% <27 hloructhanc(Ethyl Chloride) 5030B 12/17/20:214998VRG Blank u IL ND ¢I h]oroFnrnt 5030B 12/17/20214998VRCi Blank u L ND <1 hloromcthanc(Mcth 1 Chloride) 5030B 12117/20:214998VR6 Blank u L ND <0.5 •is-1,2-Dich]rn-oeth lene 5030B 1 211 7120 2 1 4448VRG Blank ueJL ND <U.S is-1.3-D ic h loroprop ono 5030B 12117/20:214998VR6 Blank u I. ND <0.5 Dibmmochloromelhane 5036E 12/17/20:214998VRG Blank ug/L ND -2 Dibromofluromethane 5030H 12/17'20:214998VRG Blank ug/L 25-W 97.7%, 67-133 LCS ug/L 25.W 9 6,1 % 67-133 MS ug/L 25.00 95.1% 67-133 (SP 2017388-001) MSD ugVL 25,W 95.6% 67-133 MSRPD ug/L 25.00 0.5%n _40.0 Dibromornethane 5030H 12/17/20214999VRG Blank ug/L ND <0.5 Dichlorodif)uorarmhatic 5030B 12/17/20:214998VRG Blank u l- I ND <0.5 Dichlommethane 5030E 12/I7/M:2I4998VRG Blank iipJL ND <5 hth 1 tert-Butyl Ether 5030B 1 211 7120 2 1 499 8VRG Blank ug/L ND <2 Eth lbenxene 5030B 12/17120:214998VRG Blank u L ND <0.5 Freon-i l 5030B 12117/20:214998VRG Blank u L ND ¢1 Hexachlorobutadiene 5036E 12/17/20:214998VRG Blank ug/L ND <5 Isopropyl Rther 5030B 1 211 7/20 2 1 499 8VItCi Blank ug/L ND <5 Isopropylbenzene 5030B 12/17/20:214998VRG Blank u 1- ND <0.5 Methyl tort-Bu l Ether(MTBE) 5036E 12117/20:214998VRG Blank ug/L ND ¢2 Naphthalene 5030E 12/17/20:214998VRG Blank uPJL ND <5 n-Butvibenzene 5030B 1 211 7/20 2 1 499 8VItG Blank ug/L ND <0.5 -Pro ybmzcnc 5030B 12/17/20:214998VRG Blank ug/L ND <0.5 -fi.opropyholuene 5030B 12117/20:214998VRG Blank vgJL ND <0.5 ,cc-Bu lbenzeite 5030B 12117/20:214998VRG Blank u IL ND <0.5 rene 5030B 12!17/20:214998VRO Blank u L ND <0.5 FAME 5030E 12117/20:214998VRG Blank ug/L ND ¢5 ert-Butanol 5030B 12/17/20:214998VRG Blank u L ND <5 ett-Bu b-nzene 5030B 12/17/20:214998VRG Blank u L ND <0.5 retrachlorocth lone(PCE) 5030B 12117/20:214998VRG Blank u L NI) <0.5 "oluene 5030E 12/17/20:214998VRG Blank ug/L ND <0.5 LCS ug/L 25.00 92.9% 56-131 MS ug/L 25.00 99.7'%n 44-164 (SP 2017388-001) MSD uWL 25.00 96.1% 44-164 MSRPD ug/L 25.06 1 3.6% c30 roluene-d8 5030B 12117/20:214998VRG Blank ug/L 25.W 98.5'% 71-119 LCS ug'L 25.00 102% 71-119 MS ug/L 25,00 101'%v 71-119 (SP 2017388-001) MSD ug/L 25.00 97.9% 71-119 MSRPD ug/L 25.00 2.8% 520 cans-I,2-Dichloroeth ylene 5030H 12117/20:214998VRG Blank ug/L ND <0.5 Ina ns-1,3-Dichlom ro ene 5030E 12/17120:214998VRG Blank ug/L NI) <0.5 rrichloroethylene(I-CL) 5030H 12 I V20:214998VRG Blank ug/L ND <0.5 LCS ug'L 25.00 94.8% 61-123 MS ug/L 25.00 103%. 41-167 (SP 2017388-001) MSD ug/L 25.00 96.4% 41-167 MSRPD ug/L 25.00 6.4% c32 Vinyl Acetate 5030B 12117120:214998VRG Blank a IL itD <10 Vinyl Chltnide 5030B 12/l7!2G114998VRG Blank u L ND <0.5 lenes rn,p 5030H 12117120:214998VRG Blank ug/L ND <2 )ones o 5030B 12/17/20:214998VRG Blank u*•'L ND <2 Pagc 16 of 30 January 5, 2021 Lab [D : SP 2017388 South Tahoe Public Utility District Customer : 2-11369 Quality Control-Organic Constituent !Method DatellD Type Units Conc. QC Data DQO Note Organic Aldrin 608.3 12117/20:214798caa Blank ug/L ND =005 LCS «e/L 0.5000 55.1 % 42.140 BIs ugil. 0.5000 93.4% 42-140 BSD ug/L U.5000 94.5% C-140 13SRPI) a /t. 0.5010 12.4°S, <35 Alpha BHC 608.3 12117120:214798caa Blank ug/1, N1) <0.05 LCS uWL 0.5000 54.8% 37-140 BS ug/L 0.5000 92.5% 37-140 BSD ug/L 0.5000 101 % 37-140 13SRPD u L 0.5010 8.40I. _-36 Beta BHC 608.3 12117'20:214798caa Blank ug/L ND =0.05 LCS ug/L 0.5000 64.1 %n 17-147 BS IIWL, U.5000 92.0% 17-147 BSD iiy'L U.5000 99.1 `Y5 17-147 BSRPD ug/L 0.5010 7.4% �=44 'Mordant 608.3 12.117/20:214798caa Blank u L ND •-0.] DDD 608.3 1 2/17.20:214798caa Blank ug/L ND <0.05 LCS ug/L 0.5000 84.7% 31-141 HS uglL 0.5000 95.4% 32-130 BSD ug/L 0.5U00 99.0`Y6 32-130 BSRPD uvJL 0.5010 3.7'%n S39 DDE 6083 ]2/17120:2]4798caa Blank uWL ND <0.05 LCS uWL 0.5000 92.2% 30-145 BS ug/L 0.5U00 101 '% 13-133 BSD ug/L 0.5000 105% 13-133 HSRPD u iL 0.5010 4.40/,o 535 DDT 608.3 12,117120:2]4798caa Blank ug'L ND <0.05 LCS ug/L 0.5000 84.3% 25-160 BS ug/L 0.5000 97.2% 6-146 RSD ug•'L 0.5000 99.6% 6-146 BSRPD aeL 0.5010 2.4% _42 Delta BHC 608.3 12/17/20:214798caa Blank ug/L ND -U.05 LCS 11g1l. 0.5000 71.5% 19-140 BS ug/L 0.5000 95.4% 19-140 BSD ug/L 0.5000 102'%n 19-140 HSRPD ug/L 0.5010 7.10/,o -52 eldrin 608.3 12117120:214798caa Blank ug/L ND c0.05 LCS ug/L 0.5000 64.6% 36-146 US ug•'l. 0.5000 89.7% 49-118 BSD ug/L 0.50OU 94.0% 49-119 HSRPD a !L 0.5010 4.7% -e49 Endnsu]1fin 1 608.3 12117120:214798caa Blank ug/L ND -0.05 LCS tig!L 0.5000 83.9% 45-153 BS ug'L 0.5000 99.9% 17-169 BSD ug.'L 0.500D 102% 17-168 BSRPD u /L 0.5010 3.5% <28 L:ndnsulfan II 608.3 ]2117120:2]4798caa Blank ug/L ND -0.05 LCS ugll. 0.5000 99.6% 5-202 BS ug/L 0.5000 106`Yo 0-291 BSD ug/L. 0.5000 109% 0-291 BSRPD ug/L 0.5010 2.6% �:53 L•ndosulfan Sulfatc 609.3 12117'20:214798caa !dank uS/L ND 0.05 LCS ug/L 0.5000 89.1 Io 26-144 }3S t� .•'L 0.5000 95.9°/ 47-128 Page 17 of 30 January 5, 2021 Lab ID : SP 2017388 South Tahoe Public Utility District Customer : 2-11369 Quality Control-Organic Constituent Method Date11D Type Units Conc. QC Data DQO Note Organic Endosulfan Sulfite 609.3 12/17120:214798caa BSD ug/L 0.5000 97.7% 47-128 BSRPD ug/L 0.5010 1.9% <18 Endrin 608.3 12/17/20214798caa Hlank ug/L ND <0.05 LCS ug/L 0.5000 6.9'% 51-130 320 BS ug/L 0.5000 46.2% 43-132 BSD ug/L 0.5000 83.7':/0 43-132 BSRPD uu1L 0.5010 57.7% '48 410 Endrin Aldehyde 608.3 12/17/20:214798caa Blank ug/L ND <0.05 LCS ug/L 0.5000 7 7.0% 50-13U BS ug/L 0,5000 95.2% 16-116 BSD ug/L 0.5000 94.2% 16-1 16 BSRPD ug/L 0.5010 ].0% 540 Endrin Ketone 609.3 12/17!20:214798caa Blank ug/L ND <0.05 LCS ug/L 0.5000 121% 50-130 BS ug/L 0.5000 116% 28-162 BSD ug/L 0.5000 103 OX, 28-162 BSRPD ug/L 0.5010 11.1% -40 Heptachlor 608.3 12/17/20214798caa Blank ug/L ND <0.05 LCS ug/L 0.5000 64.0% 34-140 BS ug/L 0.5000 97.1% 34-140 BSD ug/L 0.5000 107% 34-140 BSRPD u L 0.5010 9.9% �43 Heptachlor Epoxide 608.3 12/17/20:214798caa Blank ugll- ND <0.05 LCS ug/L 0.5000 75.4'% 37-142 BS ugll- 0.5000 93.0% 37-142 HSI) ug/L 0.5000 97.0% 37-142 BSRPD ug/L 0.5010 4.3% <26 I.indane 609.3 12117120:214798caa Blank uglL ND <0.05 Les ug/L 0.5000 61.1 % 19-140 BS ug/L 0.5000 94.1 % 32-140 BSD ug/L 0.5000 101% 32-140 BSRPD ug/L 0.5010 7.4% c39 Mcthoxychlor 608.3 12/17120214798caa Blank ug/L ND <0.1 LCS ug/L 0.5000 85.0% 23-142 BS ug/L 0.5000 111% 51-126 BSD ug/L 0.5000 114% 51-126 BSRPD u L 0.5010 2.4% �40 PCB 1016-1 608.3 12/17/20:214798caa Blank ug/L ND N.5 PCB 1221-1 609.3 12/17120:214798caa Blank u IL ND <0.5 PCB 1232-1 609.3 12117120:214798caa Blank ug/L ND <0.5 PCB 1242-1 609.3 12/17120:214798caa Blank u L ND <0.5 PCB 1248-1 608.3 12117120:214798caa Blank u IL NO <0,5 PCB 1254-1 609.3 12/17120:214798caa Blank a IL ND <0.5 PCB 1260-1 609.3 12117120314798caa Blank ug/L ND <0.5 ctrachloro-m-xylenc 609.3 12117/20:214798caa Blank ug/L 0.5000 21.8% 5-124 LCS ug/L 0.5000 31,9% 5-124 BS ug/L 0.5000 64.4% 26-141 BSD ug/L 0.5000 76,6% 26-141 BSRPD ug/L (MOIL 17.3% c_l 410 oxa hene 1 608.3 1 12117120:214798caa Blank ugll- ND <0.5 ldrin 609/8081 12/24/20:2204 SOS BL CCV ugll, 50.00 93.6% 75-125 CCV luglL 50.00 97.1 0/, 75-125 Alpha BHC 601/8081 1212412022D480SBL CCV ug/L 50.00 92.8% 69-125 CCV u L 50.00 101% 69-125 Page 18 of 30 January 5, 2021 Lab 1D : S1 2017388 South Tahoe Public Utility District Customer : 2-11369 Quality Control -Organic Constituent Method Date/ID Type Units Conc. QC Data 1)Q0 Vote Organic Beta 13HC 608/8081 12/24120:220480SBL CCV ug/L 50.00 91.011,0 75.125 CCV u IL 50.00 102% 75-125 Chlordane 608/8081 12i30/20:220657SHL CCV ue1L 500.0 102% 85-115 CCV u IL 1000 91.8°I, 85-115 Delra BIIC 608/8081 12/24/20:220480S131- CC ug11. 50.00 94,9% 75-125 CCV ug/L 50.00 106%n 75-125 Oieldiin 608/8081 12/24120:220480SHL CCV ugIL 50.00 88.3% 48-125 CCV u IL 50.00 92.2/o 48-125 Endosulfan 1 608/808] 12/24/20:220480SBL CCV ug/L 50.00 96.4% 75-125 C'CV u r!I. 50.00 99.1% 75-125 Endosulfan 11 608,'8081 12124/20:220480SBL CCV ug/L 50.00 98.8% 75-125 CCV a IL 50.w 106% 75-125 Endosulfan Sulfate 608/8081 12/24120220480SBL CCV ug/L. 50.W 91.U'/o 70-125 CCV ug/L 50.00 92.1% 70-125 Endrin 608/8081 12/24.!20:220480SBL CCV ug/L 50.w 84.9%v 5-125 C:CV u r/1. 50.00 109% 5-125 Endrin Aldchydc 608/8091 12124120:220480SBL CCV ug/L 50.00 102'% 5-125 CCV ug/L 50.00 98.0 0/, 5-125 k.ndrinKetone 608i8081 12/24/2U20480SBL CCV ug/L 50.w 94.90/� 5-125 CCV ug/L 50.00 90.1% 5-125 Reprachlor 608/8081 12/24/20:220572SBL CCV ug�L 50.00 97.5'% 75-125 CCV ug/L 50.00 104% 75-125 H ep tach lor Epox i de 608/8081 12/24/20X(W80SBL CCV ug/L 50.00 91.90/a 75-125 CCV u IL 50.M 96.3'Vo 75-125 Lindane 608/8091 12/24/20:220480SBL CCV ug/L 50.00 92.6% 75-125 CCV a IL 50.w 102% 75-125 ethoxychlor 608/8081 12/24/207 220480S1;1, CCV ug/L 50.00 87.5% 75-125 CCV ug/L 50.00 105 No 75-125 p-Don 608.'8081 12/24/20:220480SBL CCV ug/L 50.00 85.1% 75-125 CCV 11 rl[. 50.W 110% 75-125 p-DDE 608/8081 12�24120:220480SBL CCV ug.L 50.00 95.1% 75.125 CCV a /L 50.00 109 0/i 75-125 p,p-DIYI 609/9091 12124/20:220480SBL CCV ug/L 50.00 93.0 0/i 75-125 CCV ug/L 50.W 92.0% 75-125 PCB 1016 608/8081 12130/20:220657SBL CCV ug/L 501.5 1 l9% 75-125 CCV u=1I. 1003 119% 75-125 PCB 1260 609/9081 12/30/20:220657SBL CCV ug/L 500.0 109% 75-125 CCV u 'L 1000 ]15%n 75-125 l ettachloro-m-xylene 609/9091 12/24120220480813L CCV ug/L 400.0 106% 85-115 CCV ug/L 50.00 118 0/, 85-115 362 roxaphene 608/9091 12130120:220657SBL CCV ug/L 500.0 108% 68-134 CCV uglL 1000 121% 68-134 1,2,4-1richlorohen7ene 625.1 12.121120:21492&aa Blank ug/L N❑ <1 LC:S ug/L 20.00 74.2% 57-130 HS ug.'L 20,00 75.5% 44-142 BSD ug/L 20.00 72.4% 44-142 BSRPI) ueL 2000. 4.1% _'50 625.1 12129/20:220677SBL CCV mfYL 20.W IN% 61-130 625.1 12131120:220741S3L CCV mff1L 20.00 1070% 61-130 i,2-Dichlorobcnzmc 625.1 12/21!20:214928caa Blank ug/L ND =1 LCS ug/L 20.00 76.5 0/, 5-123 BS ug/L 20.00 77.4% 21-115 BSD ug'L 20.00 74.0°/, 21-115 BSI{PI) tl !L 20.00 4.5% 1 -jo Page 19 of 30 January 5, 2021 Lab ID : SP 2017388 South Tahoe Public Utility District Customer : 2-1 1369 Quality Control- Organic Constituent Method I)SWID 'Hype LJnit% Cone. QC Data DQO vote Organic 1.2-Dichlorobenxene 625.1 12129,+20:220677S131. CC:V 11 igj L 20.00 1090/, 80-120 625.1 12/3 1/20:22 074 1 SB L CCV m L 20.00 1 10% 80-120 1,2-Diphenyl hydra zine 625.1 12/21120:214928caa Blank ug/L N❑ <l LCS ugJL 20.00 77.6% 60-140 BS uuJL 20.00 82.7% 34-126 13SD ug11. 20.00 76.9% 34-126 BSRPD u IL 20.00 7.3% <-30 1,3-1)ichlrn'oben7.ene 625.1 12121i20214928caa Blank ug/L ND <l LCS uWL 20.00 73.5% 5-124 BS ug'L 20.00 73.9°/0 17-108 BSI) ug'1. 20.00 70.1 OX, 17-109 BSRPD ug/L 20.00 5.3% :_30 625.1 12/29,/20:720677SBL CCTV m IL 20.00 108% 80-120 625.1 12i3U20:220741SBL CCV n1 1. 20.00 112% 80-120 1,4-Dichlorohen7ene 625.1 1121120:214928caa Blank ug/L ND <1 LCS ug/L 20.00 7 6.1% 5-115 BS ug/L 20.00 76.0% 20-1 12 BSD ug/L 20.00 72.8% 20-1 12 BSRPD uWL 20.00 4.3% <30 625.1 2./29i20:220677S13L CCTV m L 20.00 108% 80-120 625.1 12131120:22074ISBL CCV m 1. 20.00 1 12% 80-120 4,5-1 richlomphenol 625.1 12121/20:214928caa Blank ug/L NI) <2 LCS ug'L 20.00 77.5°/, 10-181 HS ug/L 20.00 8 2.6°/, 32-156 BSD ug/L 20.00 77.5% 32-156 BSRPD u 'L 20.00 6.3% =30 625.1 12/29/20220677SBL CCV m L 20.00 108% 70-130 625.1 12/31'20:22074IS131, CCV m L 20.00 102°/, 70-130 4,6-Tribrom(phenol 625.1 12.21/20:214928caa Blank ug/L 20.00 33.2% 5-1 18 LCS ug/L 20.00 68.4'% 5-1 IS 13S ug/l. 20.00 71.6°/, 38-109 BSD ug/L 20.00 68.3'VG 38-109 BSRPD uWL 20.00 4.7% �00 625.1 12.129/20:220677SBL CCV mjJL 1 20.00 109% 60-140 625.1 12/31/20:220741 SB L CCV rn L 20.00 95.1% 60-140 4,6-Trichlorophenol 625.1 12/21/20:214928caa Blank ug'L N❑ <1 LCS ug1l. 20.00 80.6% 52-129 BS ug/L 20.00 86.4% 37-144 HSI) uWL 20.00 82.40/, 37-144 BSRPD a 1L 20.00 4,7% <58 625.1 12/29/20:220677SBL CCV m 1L 20.00 110% 69-131) 625.1 12131120:220741S131. CCV m 'L 20.00 103% 69-130 4-1)ichloropheno1 625.1 12121/20:214928caa Blank ug/L ND <2 LCS ug/L 20.00 77,7% 53-122 BS ug/L 20.00 84.1/o 39-135 t3SI) ug/1. 20.00 78.2% 39-135 BSRPD I ug/L 20.00 1 7.3% <-50 625.1 12129120:220677SL31. C:C V m L 2000. 108% 64-130 625.1 12,'3]'20220741 SBL CCV m L 20.00 103% 64-130 4-Dimerhylphonol 625.1 12./21!20:214928caa Blank ug/L ND <2 LCS ug/L 20.00 67.0% 42-120 BS uWL 20.D0 77.6% 32-120 BSD ug11, 20,00 69.7% 32-120 BSRPD I ug��L 1 20.00 1 10.7% 1 =58 Page 20 of 30 January 5, 2021 Lab ID : SP 2017388 South Tahoe Public Utility District Customer : 2-1 1369 Quality Control-Organic constituent Method DfItc111) type Units Cone. QC Data DQO Note Organic 2,4-❑itncthylphenol 625.1 12129120220677SI31. CCTV m r L 20.00 98.9% 58-130 625.1 12/31/20:220741SBL CCV ragjL 20.00 81.2% 58-130 �,4-Dinitrophctiol 625.1 12i2112U:214)28caa Ilank ug/L ND <5 LCS ug1L 20.00 96.4% 1-173 BS ug/L 20.00 75.9`;0 5-191 BSD ug11. 20.00 83.8%, 5-191 BSRPD ug/L 20.00 1.6 <5 625,1 12/29/20:220677SHL CCV in iL 20.00 106% 39-173 625.1 12/31i20:220741SBL CCV m,I. 20.00 96.0% 39-173 4-Dinitrotoluene 625.1 1121120214928caa Blank uglL ND :1 LCS uWL 20.00 99.2% 48-127 BS ug/L 20.00 91.6% 39-139 BSD ug/L 20.00 88.9% 39-139 BSRPD u I. 20.00 3.0% =42 625.1 12/29/20:220677SBL CCV m 1L 20.00 121'% 53-130 625.1 12.!31/20:2207415BL CCTV nigM 20.00 120% 53-130 6-Dinitrololuone 625.1 12121.'20:214928caa Blank ug/L IUD <1 LCS ug'L 20.00 93.1 % 68-137 BS uglL 20.00 96.9% 50-158 BSD ug/L 20.00 92.1 % 50-158 BSRPD u 11. 20.01) 1 5.1% :�48 625.1 12/29/20:220677SBL CCV m 'L 20.00 125% 68-137 625.1 12/31/20:220741SBL CCV rneJL 20.00 123'% 68-137 Chlorophcnol 625.1 12/21/2U;214928caa Blank ug/L ND <2 LCS ug/L 20.00 76.1 % 36-120 BS ug/L 20.00 83.7% 23-134 BSD ug/L 20.00 75.5% 23-134 BSRPD ug/L 20.00 10.3% 1 =61 625.1 12/29/20:220677SBL CCV to L 20.00 106% 55-130 625.1 12/31/20:220741SBL CCV nt*L 20.00 96.9% 55-131) -Fluorobipheny] 625.1 12121120214928caa Blank uglL 10.00 39.1% 20-97 LCS ug/L 10.01) 77.2% 20-97 BS ug/L 10.00 8I.6% 22-97 BSD ug/I. 10.00 76.0%, 22-97 BSRPD ug/L 20.00 7.2% 1 �30 625,1 12/29/20:220677SHL CCV m L 10.00 124% 60-140 625.1 12/31/20:220741SBL CCV m r L 10,00 125% 60-140 Fluorophenol 625.1 12!21/20:214928caa Blank ug/L 20.00 29.0% 5-95 I.CS ug/L 2U0 60.2°/i 5-95 BS ugll, 20,00 69.9% 10-95 BSD ug,'L 20.00 60.4% 10-95 BSRPD ug/L 20.00 14.6% 1 530 625.1 12/29/20:220677SBL CCV m 'L 20.00 114% 60-140 625.1 12.'31/20:220741S131. CCV m L 2000 II1% 60-140 -Nitrophenol 625.1 12.!21120:214928caa Blank ug'L ND <2 LCS ug./L 20,00 901% 45-167 BS ug/L 20.00 88.2% 29-192 BSD ug11. 20.00 8 L7% 29-182 BSRPD a /L 20.00 7.6% 1 05 625.1 12.129/20:220677SIU, CCV m L 2000. 1080/i 61-163 625.1 12/31!20220741SBL CCV m WL 20.00 108% 61-163 3-Dichlorobcnzidinc 625.1 12121120:214928caa Blank ug/L N❑ <l LCS ug/L 20.W 49.5% 8-213 13S a IL 20.00 45.7/o 5-262 Page 21 of 30 January 5, 2021 Lab ID : SP 2017388 South Tahoe Public Utility District Customer : 2-11369 Quality Control-Organic Constituent Method Date/ID 1'ype Units Conc. QC Data DQO Note Organic 3-Dichlorubenzidinc 625.1 12/21/20:214928caa BSD uglL 20.00 48.8% 5-262 BSRPD u IL 20.00 6.6% <108 625.1 12/29/20:220677SBL CCV m IL 20.00 91.0% 18-213 625.1 12/31/20:220741SBL CCV m L 20.00 74,2% 18-213 6-1)initro-2-methylphenol 625.1 12121120;214928caa Blank uglL ND e2 LCS uglL 20.00 100% 53-130 BS uglL 20.00 95.8% 5-181 BSD ug/L 20.00 97.3% 5-181 BSRPD u /L 20.00 1.5% <203 6-Dinitro-o-cresol 625.1 12/29/20:220677SBL CCV mg/L 20.00 131% 56-130 1 360 625.1 12/31!20:220741SBL CCV m L 20.00 110% 56-130 13romophenylphenylether 625.1 12/21/20:214928caa Blank uglL ND <1 LCS uglL 2000. 82.9% 65-120 BS uglL 20.00 89.1 % 53-127 BSD uglL 20.00 81.7% 53-127 HSRPD u IL 20.00 8.71X. _43 625.1 12/29/20:220677SBL CCV m L 20.01) 102% 70-130 625.1 12/31,'20:220741SBL CCV m !L 20.00 98.2'% 70-130 Nitrophenol 625.1 12/21/20:214928caa Blank uglL ND <2 LCS uglL 20.00 103% 13-129 BS uglL 20.00 823% 5-132 BSD uglL 20.00 93.3'% 5-132 BSRp17 u IL 2000 12.5% 1 �131 625.1 12129120:220677SB1. CCV m L 2000 112% 35-130 625.1 12/31l20:220741SBL CCV m L 20.00 98.3% 35-130 cenaphthene 625.1 12121120:214928caa Blank uglL ND <l LCS uglL 20.00 95.1 °% 60-132 BS uglL 20.00 99.1 % 47-145 BSD uglL 20.00 84.3% 47-145 BSRPD u IL 2D.00 5.5% --58 625.1 12/29/20:2206775B1. CCV m L 20.00 108% 70-130 625.1 12/31'20:220741SBL CCV m L 20.00 111 % 70-130 cenaphthylene 625.1 12/21/20:214928caa Blank uglL IUD <1 LCS ug�L 20.00 83.6% 54-126 BS uglL 20.00 98.4% 33-145 HSD uglL 2000. 82.8% 33-145 BSRPD u IL 2U.00 6.6% -s74 625.1 12'29/20:220677SBL CCV m L 20.00 109% 60-130 625.1 12/31120:220741SBL CCV m L 2000. M% 60-130 nthracene 625.1 12121120:214928caa Blank uglL ND <l LCS uglL 20.00 92.3% 43-120 BS uglL 2U.00 96.1% 27-133 HSD uglL 2000. 91.8% 27-133 BSRPD I u !L 20.00 5.1% 1 =fib 625.1 12129120:220677SBL CCTV m L 20.00 109% 58-130 625.1 12131120:220741 S B L CCV to L 20.00 109% 59-130 xobcnzme 625.1 12/29120:220677511L CCTV m L 20.00 105% 80-120 625.1 12+31/20:220741SBL CCV m�L 20.00 108% 80-120 Benxidinc 625.1 01/02/21:220759SBL CCV mEJL 20.02 116% 18-213 625.1 12'21120:214928caa Blank uglL ND <2 LCS uglL 20.02 6.2% 10-55 320 BS uW1. 2002. 15.4% 0-21 BSD uglL 20.02 12.3% 0-21 BSRPD I a 'i- 1 20.00 1 0.63 52 Page 22 of 30 January 5, 2021 Lab ID : SP 2017388 South Tahoe Public Utility District Customer : 2-11369 Quality Control -Organic Constituent Method DatellD Type Units Conc. QC Data UQO Note Organic henxidine 625.1 12129120:220677SBL CCV m J L 20.02 36.0% 18-213 Bcnzo(a)anthracene 625.1 12121!20214928caa Blank uglL ND =1 LCS uglL 20.00 96.9% 42-133 BS ug!L 20.00 91.5% 33-143 BSD 1, gl1. 20,00 86.09El 33-143 BSRPD a&L 20.00 6.2% <53 625.1 12/29/20-1220077SBL CCV m IL 20.00 116% 42-133 625.1 12i31!20:220741SBL CCV m r11. 20.00 119% 42-133 13enZo(a)py'ene 625.1 12121/20:21492Scmi Blank uglL ND <1 LCS 11g!1. 20,00 91 A% 32-148 BS uglL 20.00 83.2% 14-163 HSD ug'L 20.00 79.0°% 14-163 BSRPD I a 11. 20.00 5.2% <72 625.1 12/29/20:220677SBL CCV to L 20.00 112% 1 32-148 625.1 1261/20220741SBL CCV m WL 20.00 115% 32-148 13enxo(b)lluoranlh0r1c 625.1 12121120:214928caa Blank aag!I. ND <1 LCS uglL 20.00 88.3% 42-140 13S ug!L 2000. 89.1% 24-159 13SD ug!L 2000. 87.4% 24-159 BSRPD u IL 20.00 1.9% <71 625.1 12129120:2206775BL CCV m L 20.00 112% 42-141) 625.1 12/31'202207415BL CCV m !L 20.00 119% 42-140 cnco(g,h,i)perylcnc 625.1 12121/2U:214928caa Mank uglL ND <1 LCS ug!L 20.00 83.6% 1 U-195 SS ug!L 20.00 69.5% 5-219 3SD ugl1. 20.00 75.9% 5-219 BSRPD ug!L 20.0U 8.7% =9 7 625.1 12/29/20:220677SBL CCV m VL 20.00 1 12% 13-195 025.1 12131'20:2207415BL CCV m IL 20.00 94.0% 13-195 Bcnza(k)tluorantliem, 625.1 12121/2U214928caa Blank uglL ND <1 LCS uglL 20.00 74.6% 25-146 HS uglL 20.00 86.0% 11-162 I3SD ugll. 20.00 74.3% 11-162 BSRPD I ug!L 20.00 14.6% 1 =63 625.1 12/29.'20:220677SBL CCTV m L 20.00 101% 25-146 625.1 12'31120:220741SBL CCV m r L 20.00 103% 25-146 s(2-Chloroethoxy)metliane 625.1 12121/20:214928can Blank uglL ND <1 1.C:S ug!L 20.00 86.3°/i 49-165 13S ug/1. 20.00 92.1% 33-194 HSD uglL 20.00 83.8% 33-194 BSRPD I ug!L 20.00 9A% I <54 625.1 12/29.120220677SBL CCV m L 20.O0 1U9% 52-164 625.1 12!31/70:220741SH1, CCV m l- 20.00 109°% 52-164 bi s(2-ChIomelhyl)elher 625.1 12121/20:21492Scaa Blank ug.'L ND <1 LCS ug11. 20.00 93.4% 43-126 BS ug!L 20.00 88.1% 12-158 HSD ug/L 20.00 79.8 ON, 12-159 BSRPD ap'L 20.00 9.9% 1 -108 625.1 1Z129r20:220677SHI- CCV m L 20.00 1064,E 52-130 625.1 12/3 1/20:22 074 1 S B L CCV m 'L 20.00 98.1% 52-130 his(2-Chloroisopropyl)et lie r 625.1 12/21120:214928caa Blank uglL N❑ <l LCS ue�L 20.00 71.2% 63-139 BS uglL 20.00 76.1% 36-166 BSD ue'I. 20.00 67.5°/ 36-166 Paige 23 A30 January 5, 2021 Lab ID : SP 2017388 South Tahoe Public Utility District Customer : 2-11369 Quality Control -Organic Constituent Method Date11D Type Units Conc. QC Data DQO Note Organic is(2-Chloroisopropy1)c1hcr 625.1 12121120:214928caa BSRPD urtlL 20.00 12,0% <76 625.1 12/29/20:220677SBL CCV m L 20.00 103% 63-139 625.1 12/31/20:220741S13L CCV m I. 20.00 121 % 63-139 s(2-FLhylhexyI)phthalate 625.1 12121120:214928caa Blank uglL ND Q I.CS ugll. 20,00 91,2% 29-137 BS ug/L 20.00 112% 8-158 3SD uglL 20.00 93.0% 8-158 BSRPD ug/L 20.00 18.6% <92 625.1 12129/20:220677SBL CCV m L 20.00 124 No 43-137 625.1 12n 1!20:220741 SBL CCTV m L 20.00 15001,, 43-137 360 Burylbcnzylphthalale 625.1 12121120:214928caa Blank ug/L ND <2 LCS uglL 20.00 92.0% 10-140 BS ug1I. 20.00 112% 5-152 BSD ug/L 20.00 96.4 No 5-152 BSRPD a IL 20.00 15.00/40 7560 625.1 12.129.120:220677SUL. CCTV m L 20.00 123% 43-140 625.1 12131120:220741SBL CCV m L 20.00 150% 43-140 360 'hloronaphthalene 625.1 12121120:214928caa Blank uglL ND <] LCS ug/L 20.00 77.5% 65-120 BS ug/L 20A0 80.8% 60-120 BSD ug/L 20.00 76.1'% 60-120 BSRPD a IL 20.00 6.1% 1 �4 625.1 12/2912U:220677SBL CCV m L 20.00 110°/0 70-130 625.1 12,131120:220741SBL CCV rn L 20.00 111 % 70-130 hlorophonylphenyk:ther 625.1 12121120:214928caa Blank ug/L ND <1 LCS ug/L 20.00 81.2% 38-145 HS ug/L 20.00 85.9% 25-158 BSD uglL 20.00 80.4'No 25-158 BSRPD a IL 20.00 6.6% 1 �61 625.1 12129120220677SBL CCTV n L 20.00 103% 57-145 625.1 12.131120:22U741SBL CCV rn r L 20.00 101% 57-145 hrysene 625.1 12121120:214928caa Blank ug/L ND =1 LCS ug/L 20.00 82.0% 44-140 BS ug/L 20.00 85.4% 17-168 BSD ug/L 20.00 80.6% 17-168 138RP❑ u rll. 20.00 5.8% r_87 625.1 12'29/20:220677SBL CCV m L 20.00 108% 44-140 625.1 12/31/20:220741SHL (,CV m L 20.00 110% 44-I40 Diberiao(a,h)anthraccnc 625.1 12.!21'20:214928caa Blank ug/L ND <1 LCS ug/L 20.00 87.1% 10-200 HS uglL 20.00 74.2% 5-227 BSD ug/L 20.0D 82.9'% 5-227 HSRPD u IL 20.00 11.0% <126 625.1 12/29/20:220677SBL CCV I m r L 20.00 1 15% 13-200 625.1 12.!31/20:220741SBL CCV m IL 20.00 99.7% 13-200 Di ethyl phthalate 625.1 12121120:214928caa Blank ug/L ND <1 LCS tiglL 20.00 853% 10-120 BS ug�L 20.00 91.7 No 5-120 BSD ug/L 20.00 86.0%o 5-120 BSRPD ug/L 20.00 6.4% 1 �100 625.1 12129120:220677SBL I CCV I rnEJL 20.00 106% 47-130 625.1 12/31,120:22U741SBL CCV I m•L 20.00 112% 47-130 3imelhylphlhalaLe 625.1 12121120:214928caa I Blank ug/L ND <1 LCS ug/L 20.00 86.4% 10-120 Page 24 o£30 January 5, 2021 Lab i❑ : SP 2017388 South Tahoe Public Utility District Customer : 2-11369 Quality Control -Organic Constituent Method Date/ID Type Units Cone, QC Data DQO Note Organic 13imethylplithalate 625.1 12I21120:214928caa BS ug/L 20.00 90.7% 5-120 BSD ug/L 20.00 86.0% 5-120 BSRPD u r11. 20.00 5.4% <183 625.1 12129/20-220677SBL CCV m IL 20.00 109% 50-130 625.1 12/31/20:2207418BL CCV m L 20,00 112% 50-130 Di-n-butyIplithalate 625.1 12121/20-214928caa Blank ug/L ND <2 LCS ug/L 20.00 88.0% 8-120 BS ug/L 20.00 97.0% 1-120 BSD ug/L 20.00 87.8% 1-120 BSRPD a IL 20.00 9.9% _-47 625.1 12/29/20:220677SBC CCV m 1L 20.00 108% 52-130 625.1 12131/20:220741 SBL CCV m IL 20.00 120% 52-130 Di-n-octylphthalate 625.1 12121/20:214928caa Blank ugl1. ND <I LCS ug/L 20.00 91.4% 19-132 BS ug/L 20.00 121%u 4-146 BSD ug/L 20.00 97.5%, 4-146 BSRPD I ug/L 20.00 21.5% c69 625.1 12/29/20-220677SBL CCV mvJL 20.00 130% 21-132 625.1 12.131+'20220741S13L. CCV ing j L 20.00 164% 21-132 36U Fluo anthene 625.1 12121120:214928caa Blank ug!1. ND <1 LCS ug/L 20.00 85.8% 43-121 BS ug/L 20.00 89.0% 26-137 BSD ugll, 2000. 85.4% 26-137 BSRPD u rll. 2000. 4.2% 1 566 625.1 12/29/20:220677SBL CCV I -gJL 20.00 111% 47-130 625.1 12l3 11201 22074 1SBL CCV ingiL 20.00 112% 47-13U Fluorene 625.1 12121120:214928caa Blank uglL N❑ <1 LCS ug/L 20.00 83.0% 70-120 BS ug/L 20.00 87.7% 59-121 BSD ug/L 20.00 82.9% 59-121 BSRPD ug/L 20.00 5.8% L -s38 625.1 12/29/201 220077SBL CCV m L 20.00 107% 70-130 625.1 12131120:2207415BL CCV m L 2000. 109°% 70-130 liexachloroben7,ene 625.1 12121!20:214928caa Blank ug/L ND <1 LCS ug/L 20.00 75.0% 8-142 BS ugll. 20.00 92.2% 5-152 BSD uglL 20.00 74,6% 5-152 BSRPD u L 20.00 9.7% 1 <-55 625.1 12/29/20220677SBL CCV m L 20.00 105°/ 38-142 625.1 1231/20:220741SBL CCV m L 20.00 100% 38-142 Nexachlurobutadiene 625.1 12/21/20:214928caa Blank ug/L ND <1 LCS ugfL 20.00 72.3% 38-120 BS ug/L 20.00 72.51/+ 24-120 BSD ug/L 20.00 69.2% 24-120 BSRPD u !L 20.00 4.7% :562 625.1 1229/20:220677SBL CCV m L 20.00 108% 68-130 625.1 12/31/20:220741S131, CCV m L 20.00 107% 68.130 11exachlorocyclopentadiene 625.1 12/2 1120:2 1 4928caa Blank ug/L ND <1 LCS ug/L 20.00 21.9% 10-66 BS ug/L 20.00 24.1% 0-55 BSD ug/L 20.00 25.0% 0-55 BSRPD u 11, 20.00 OJ 7 _<1 625.1 12.'29120:220677SBL CCV m !L 20.00 117% 80-120 625.1 12/31120220741S13L CCV m L 20.00 109%, 80-120 Page 25 of 30 January 5, 2021 Lab ID : SP 2017388 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic onstiluent Method DateAD Type UnitS Colic. QC Data DQO Nate Organic Hc:xachlarocthane 625.1 12121120:214928caa Blank ugll- ND <1 LCS ug/L 20.00 78.6% 55-120 BS uglL 20.00 76.9 0/, 40-120 BSI) ugl1. 20.00 74.5% 40-120 BSRPD ug/L 20.00 3.3% c_30 625.1 12/29120:220677SBL CCV m L 20.00 114"/, 55-130 625.1 12/31/20:220741SBL CCV m 1. 20.00 119"% 55-130 tndcno(1,2,3-c,d)pyrcnc 625.1 12121120:214928caa Blank ug/L ND <1 LCS ug/L 20.00 88.7% 10-151 BS uglL 20.00 77.0% 5-171 BSD ug/L 20.00 85.8% 5-171 BSRPD I ug/L 20.00 10.8% 1 c99 625.1 12/29/20:220677SBL CCV m L 20.00 1 18% 13-151 625.1 12131120;220741SBL CCV m L 20.00 102% 13-151 Isophorone 625.1 12/21120:214928caa Blank ug/L ND <1 LCS ug1L 20.00 87.5% 47-180 Bs ug/L 20.00 93.1 % 21-196 BSD ug/L 20.00 85.5% 21-196 BSRPD ug/L 20.00 8.5% =93 625.1 12/29/20:220677SBL CCV I m L 20.00 102% 52-180 625.1 12/31/20:220741SBL CCV m L 20,t10 109% 52-180 Naphthalene 625.1 12121120:214928caa Blank ug/L ND <1 LCS ug/L 20.00 78.9% 36-120 BS ug/L 20.00 84.4% 21-133 BSD ug/L 20.00 77.6% 21-133 BSRPD ug/L 20.00 8.4% 7565 625.1 12/29/20:220677SBL CCV m L 20.OD 107% 70-130 625.1 12/31/20:220741SBL CCV m L 20.00 109% 70-130 Kitroben7.=e 625.1 12121120214928caa Blank ug/L ND <l LCS ug/L 20.00 77.2'%n 54-158 BS ug/L 2000. 81.8% 35-180 BSD ug/L 20.00 75.9% 35-180 BSRPD u L 20.00 7.6% :�62 625.1 12/29/20:220677SBL CCV m L 2000. 104% 54-158 625.1 12131120:220741SBL CCV m L 20.00 111% 54-158 Nitrobcnxcnc-d5 625.1 12I21/20:214928caa Blank ug/L 10.00 38.1% I5-314 LCS ug/L 10,00 75.2% 15-314 13S ug/L 10.00 79.7% 20-104 BSD ug1L 10.00 73.4% 20-104 BSRPD ug/L 20.00 8.3"% <30 625.1 12129120:220677SBL CCV mvJL 10.00 116% 46-219 625.1 12.31120:220741SBL CCV m L 10.00 120% 46-219 N-N i trosodi methy I am ine 625.1 12/21/20214928caa Blank ug/L ND <2 LCS ug/L 20,00 72.3% 5-167 BS ug/L 20.00 75.4% 23-129 BSD ug/L 2000. 67.9% 23-129 BSRPD ug/L I 2D.00 10.4% c30 625.1 12129/20220677SBL CCV m L 2000. 107% 80-120 625.1 12/31120:220741SBL CCV I m L 20.00 109% 80-120 N-Nlitrosodi-N-propylamine 625.1 12/21/20:214928caa Blank ug/L ND LCS ug/L 20.00 84.8% 14-198 BS ug/L 20.00 89.6% 5-230 BSD ug/L 20,00 81.4% 5-230 BSRPD u L I 20.00 9.6% <87 Page 26 of 30 January 5, 2021 Lab ID : SP 2017388 South Tahoe Public Utility District Customer : 2-11369 Quality Control-Organic Constituent Method Date/ID I'ype Units Cone. QC Data DQO Note Organic N-Nirnosodi-N-propylaminc 625.1 ]2)29120:220677SBL CCV m L 2000. 1020% 59-170 625.1 12/31/20:22074 1 SBL CCV m L 20.00 108'%n 59-170 N-Nitrosodiphcnylaininc 625.1 12!21120:214928caa Blank ug/L ND <l LCS ug/L 20.00 89.2% 5-164 BS ug/L 20.00 94.6% 34-127 BSD ug/L 20.00 89.6% 34-127 BSRPD a IL 20.00 5.4% �30 625.1 12129./20:220677SHL CCV m L 20.00 95.3% 80-120 625.1 12/31/20:220741 S B L CCV m r L 20.00 102% 80-120 C'hloro-m-cresol 625.1 12l21!20:214928caa Blank ug/L ND <1 LCS ug/L 20.00 89.0% 41-128 BS ug/L 20.00 93.8'% 22-147 BSI) ug/L 20.00 89.8% 22-147 BSRPD ug/L 20.00 4.4% <73 625.1 1229l20220677SBL CCV m L 20.00 1 14% 68-130 625.1 12l31!21):220741 SBL CCV m +L 20.00 86.0% 68-130 Pontachlorophcnol 625.1 12/21/20:214928caa Blank ug/L ND <1 LCS ug/L 20.00 81.1'%n 38-152 13S uWL 20.00 76.1% 14-176 BSD ug/L 2000. 77.0% 14-176 BSRPD ug/L 20.00 1 ],]% s86 625.1 12/29/20:220677SBL CCV m L 20.00 109% 42-152 625.1 12!31120:220741 S B L CCV m IL 20.00 83.9% 42-152 Phenanthrene 625.1 12121120:214928caa Blank ug/L ND <1 LCS ug/L 20.00 83.2% 65-120 BS ug/L 20.00 87.4% 54-120 BSD ug/L 20.00 82.6% 54-120 BSRPD ug/L 20.00 5.6% 1 c39 625.1 12/29/20:220677SBL CCV m L 20.00 108% 67-130 625.1 12.31l20:220741SBL CCV m IL 20.00 109% 67-130 phenol 625.1 12121120:214928caa Blank ug/L ND <1 LCS ug/L 20.00 78.4% 17-120 BS ug/L 20.00 81.2% 5-120 BSD ug/L 20.00 73.8% 5-120 BSRPD ug/L 20.00 9.6% 1 S64 625.1 12/29/20:220677SBL CCV m L 20.00 102 0/o 48-130 625.1 12/31/20:220741SBL CCV m L 20.00 81.2% 48-130 phenol-d6 625.1 12./21!20:214928caa Blank ug/L 20.00 31.8% 8-424 LCS ug/L 20.00 67.8% 8-424 BS ug!L 20.00 70.4% 8-104 BSI ug/L 20.00 64.3% 8-104 BSRPD I ug/L 20.00 9.1% S30 625.1 ]2.129/20-220677SBL CCV m L 20.00 1 109% 48-208 625.1 12/3 1!20:220741 SBL CCV me1L 20.00 84.3% 48-208 -I-erphenyl-dt4 625.1 12121120:214928caa Blank ug/L 10.00 50.6% 18-106 LCS ug/L 10.00 78.0% 18-106 BS ug/L 10.00 90.7% 10-115 BSD ug/L 10.00 80.1% 10-]15 BSRPD I ug/L 20.00 12.4% -30 625.1 12/29120:220677SBL CCV mg1l, 10.00 126% 60-140 625.1 12/31/20:220741SBL CCV m 'L 10.00 130% 60-140 pyrcnc 625.1 12l21120:214928caa Blank ug/L ND <1 LCS ug/L 20.00 84.6% 70-120 BS uelL 20.00 99.8% 52-120 Page 27 of 30 January 5, 202 t Lab ID : SP 2017388 South Tahoe Public Utility District Customer : 2-11369 Quality Control-Organic Constituent Method Datcltt) 1'ypc Units Cane. QC Data DQD Note Organic Pyrenc 625.1 12/21/20:2 1 4928caa 13SD ug/L 20.00 87.8% 52-120 BSRPD a IL 20.00 12.8% �49 625.1 12/29/20:220677SBL CCV m IL 20.00 116% 70-130 625.1 12/31/20:220741SBL CCV m L 20,00 126% 70-130 Pyridine 625.1 12121120:214928caa Blank ug/L ND <l LCS ug/L 20.00 68.3% 60-140 BS uglL 20.00 63.8% 0-99 13SD aglL 20.00 60.6% 0-99 BSRPD ug/L 20.00 5.1% <_30 625.1 12/29!20220677,9BL CCV m L 20.00 104°/, 80-120 625.1 12/31/20:220741SBL CCV m L 20.00 112% 80-120 1,1,1,2-I-etrachloroethane 8260E 12117120:220358VRG CCV ug/L 25.00 107% 70-130 1.1.1-Trich loroe tha ne(TC A) 8260H 12/17/20:220358VIZG CCV u L 25.00 103°/o 70-130 1.1.2.2-To Irachloroethanc 8260B 12/17/20:220358VRG CCV u&L 25.00 98.8% 70-130 1,1,2-I'dchlornethane 8260E 12/17/20:220358VRG CCV I u&L 25.00 102% 70-130 IJ-Dichloroethane 8260B 12/17/20220358VRG CCV ug/L 25.00 114°/, 70-130 1,1-Dichlo octh lcne 8260B 12/17/20:220358VRG CCV u=L 25.00 I(Y) 80-120 IJ-Dichloro rn ene 8260B 12/17/20:220358VRG CCV ug/L 25.00 111% 70-130 1.2.3-Trichlorobemene 8260B 12/17120:220358VRG CCV u IL 25.00 90.4% 70-130 1.2,4-Trichlorobenzenc 8260B 12117120:220358VR6 CCV a IL 25.00 128% 70-130 1.2A-Trimeth lbnnznne 8260B I2117120:220358VRG CCV ug/L 25.00 106% 70-130 1,2-Dichlorobenzene 8260E 12/17120:220358VRG CCV u L 25.00 106% 70-130 1,2-Dichloroethane(FDC) 8260B 12/17/20:220358VRG CCV ug/L 25.00 104% 70-130 1.2-Dichloroethanc-d4 8260B 12/17/20:22035871ZG CCV ug/L 25.00 97.8% 70-130 1,2-Dichloro ro ane 8260E 12/17120:220358VRG CCV ug/L 25.00 111% 80-120 1.3.5-•Irimeth y1benaene 8260E 12/17120:220358VRG CCV ug/L 23.00 104% 70-130 1.3-Dichlorobenzene 8260B 12J17/20220358VRG CCV ug/L 25.00 105% 70-130 13-Dichloro ro anc 8260B 12/17/20:220358VRG CCV ug/L 25.00 117% 70-130 1.4-13ichlombenzene 8260B 12/IT20:220358VRG CCV ue�L 25.00 112/n 70-130 2-Dichloro ro ane 8260B 12/17120:220358VRG CCV ug/L 25.00 104% 70-130 Butanone(MEK) 826UB 12/17/20:220358VRG CCV ug/L 100.0 106% 50-150 Chlorotoluene 8260E 12/17120:220358VRG CCV u IL 25.00 109% 70-130 llexanone 8260B 1 2/1 7120 2203 5 8VRG CCV u L 100.0 154% 50-150 360 Bromotluorobenzcnc(BFB) 8260B 12/17/20:220358VRG CCV u L 25.00 103% 70-130 Chlorn[nluene 8260E 12/1720:220358VRG CCV ug/L 25.00 106% 70-130 Meth 1-2- entanone(M1BK) 8260B 12117/20:224358VRG CCV u-IL 100.0 III% 50-150 Acetone 8260B 12/17/20:220358VRG CCV ug/L 100.0 87.2% 50-150 crolein 8260B 1 2/1 7120 2203 5 8VRG CCV ug/L IOU 131% 50-150 arvlonitrilc 8260B 12/17/20:220358VRG CCV ur!L 100.0 207% 50-150 360 Benzene 8260B 12/17120:220358VRG CCV ug/L 25.00 114% 70-130 Bramobenzere 8260B 12l17120:220358VRG CCV ug/L 25.00 105°/o 70-130 13romo0loromethane 8260E 12117I20:220358VRG CCV u IL 25.00 115% 70-130 Bromodichloromelhane 8260B 12.117120:220358VRG CCV u IL 25,00 99.3% 70-130 8romnffirm 8260E 12/IT20:220358VRG CCV ug/L 25.00 104% 70-130 Bromomethanc(Methyl Bromide) 826UB 12117120:220358VItG CCV u IL 25.00 92.5% 70-130 arbcm Disulfide 8260E 12I17120:220358VRG CCV u L 100.0 94.7%n 50-150 arbon Tetrachloride 8260E 1 211 7120 2203 5 8VRCc CCV ug/L 25.00 94.0°Io 70-130 hlorobenzene 8260E 12 17120:220358VRG CCV ug/L 25.00 121% 70-130 hlaroethane(Ethyl Chloride) 8260B 12/17/20:220358VRG CCV ue1L 25,00 89.1% 70-130 hlaro('urm 8260E 12/17/20:220358VRG CCV u L 25.00 104% 80-120 lilommethane(Meth 1 Chloride) 826013 12/17/20:220358VRG CCV u L 25.00 87.1 % 70-130 is-1.2-Dichlorocrh Icnc 826UB 12117120:22U35",RG CCV u i. 25,00 105% 70-130 is-1.3-Dichloro ro ene 8260B 12/17/20:220358VRG CCV ug/L 25.00 106'% 70-130 Page 28 of 30 January 5, 2021 Lab 1D : SP 2017388 South Tahoe Public Utility District Customer : 2-11369 Quality Control-Organic Constituent Method Date/1D Type Units Corlc. QC Data DQO note Organic Dibrotnochloromcthanc 8260B 12/17/20:220358VRG CCV u /L 25.00 114% 70-130 1)ibromofltu-nme Lila lie 8260B 12/17/20:220358VRCi CCV 1_1a1L 25.00 96.6% 70-130 Dibroinotncthanc 826013 12/lW20:220358VKG CCV u,I. 25.00 100% 70-130 Dichlorodifluonnnelhane 8260E 1 21 1 7120 22 03 5 8VRG CCV u L 25.00 85.4% 70-130 Dichloromethane 8260B 12/17/20:220358V1W CCV u r I. 25.00 105% 70-130 E[h 1 tcri-But I Ether 8260B 12/17/20:220358VRG CCV u2eL 25.00 133% 50-150 Eth Iben7ene 8260H 12/17/20:220358VIZG CCV a IL 25.00 118% 80-120 Rexaolilorobu[adicnc 8260B 12/17/20:220358VRG CCV a 'L 25.00 84.5% 70-130 lso m� I I,her 8260E 12/17/20:220358VRC CCV u IL 25.00 129°/, 50-150 [sopropylbenzene 82603 12.!17120:220358VRG CCV u '1. 25.01) 108% 70-130 clh l Lott-Butyl Elhur 8260B 12117120:220358VRG CCV u L 25.00 133% 70-130 36U a Iithalene 8260B 12/17/20:220359VRG CCV ug/L 23.00 110°/, 70-130 i-Butvlbenaene 8260E 12117120:220358VRG CCV ug.11, 25.00 101% 70-130 -Pro vlbonzene 8260B 12117 10:220358VRG CCV u&L 25.00 106% 70-130 -Iso rn ltoluene 8260B 1 211 7/20 22 03 5 8VRCP CCV u IL 25.00 102°/, 70-130 sec-Bu lbenaene 8260B 12/17/20:220358VR(3 CCV u L 25.00 105% 70-130 t rune 8260B 12/17/20:220358VRC CCV a !L 25.00 112% 70-130 1AMh 8260B 12/17/20:220358VRG CCV u L 25.00 131% 50-150 ert-Butanol 8260B 12/17/20:220358VRCi CCV u L 125.0 129°/, 50-150 lert-Bu ]bcnacn: 8260B 12/17/20:220358VRG CCV u L 25.00 109% 70-130 elrachlorocth lone(PCE) 8260B 12/17/20:220358VRG CCV u L 25.00 106% 70-130 Tolueire 8260B 12/17'20:220358VRG CCV uYJL 25.00 101% 80-120 Toluene-d8 8260B 1 211 712 0 22 03 5RVItG CCV u L 25.00 106°/� 70-130 1rans-1,2-Dichioroeth lent 8260B 12/17/20:220358VRG CCV u L 25,00 100"/ 70-130 rans-1,3-Dichloru ro ene 8260B 12/17/20:220358VRG CCV u L 25.00 102% 70-130 ]"richIoroeth Y1ene0CH 8260B 12/17/20220359VRG CCV UgIL 25.00 98.1°/, 70-130 'Fri chlorofluoromethane r-i 1 8260B 12/17/20220358VRG CCV u L 25,00 85.0°/� 70-130 invl Acc[ato 8260B 12117120:220358VRCi CCV a 'L 100.0 105% 50-150 Vinyl Chloride 8260B 12i 17i20:220358VRG CCV u&L 25.00 81.6% 80-120 H lene rn,p 8260B 12/17/20:220358VRG CCVu IL 50.00 116°/, 70-130 �Xylcncs o 8260B 12/17/20:220359VR(; CCV u L 25.00 118% 70-130 Definition CCV Continuing Calibration Verification-Analyzed to verify the instrument ca]i bra tion is within criteria. Blank :Method Blank-Piepared to verify that the preparation process is not contributing contamination to the samples. LCS :Laboratory Control Stan daid/Sample-Prepan;d to veriFy that the preparation prncess is not affecting analy[o rue ovory. MS Matrix Spikes-A random samplo 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 MSIMS❑pair-A random sample duplicate is spiked with a known amount ofanalyte. 1-he n;coveries are an indication of how that sample matrix affects analyte recovery. BS :Blank Spikes-A blank is spiked with a known amount ofanalyre.It is prepared to verify that the preparation process is not affecting analyte recovery. BSD :Blank Spike Duplicate of BSIBSD 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 :MSIMSD Relative Percent Difference(RPD)-The MS relative percent difference is an indication of precision for the preparation and analysis. BSRPD :BSlBS❑Relative PcrccnI Difference(RPD)-The BS relative percent difference is an indication of precision for the pLeparatioil and analysis. ND :Non-detect-Result was below the DQO listed for the analyte. DQO Data Quali ty Obj cctivc-This is the criteria against whicli the quali N control data is com p aced. Explanation 320 :LC not within Acceptance Range(AR),I)ata was accepted has&I on the B513S1)recovery. 360 :CCV above Acceptance Range(AR).Samples which were non detect for this analyte weir accepted. 362 :Surrogates are qualified on Control Chart Limits,Ihese are CCV limits.See individual sample reports. 410 :Relative Percent Diffcrcnce(RPD)not within Maximum AI1ok+able Value(MAV).Data was accepted hased on the L C S or CCTV recOVerv. Page of 30 Page 30 of 30 ENVIRONMENTAL A.CiRiCULTUML February 25, 2021 South Tahoe Public Utility District 1275 Meadow Crest.Drive South Lake Tahoe, CA 96150 Subject: Subcontract Analyses for FGL Lab No. SP 2017388 Enclosed please find results for the following sample(s) which were received by FGL. ■ Sub Organic-EPA 8270 • Sub Organic-EPA 8082 • Sub Organic-EPA 8081 Please note that this analysis was performed by Babcock Laboratories, Inc. (ELAP Certified Laboratory) Thank you for using FGL Environmental. Sincerely, �vn�i•.vxd by C 0,Ap,i. Cindy Aguirre ,tk L .1� S,v Rrp Enclosure Corporate Offices&Laboratory Office&Laboratory Office&Laboratory OMce&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.LindoAvenue 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:(605,392-2000 TEL:(209)942-D182 TEL:(530)343-5518 TEL:(805)793-2940 TEL:(559)734-9473 Env FAX-(805)525-41721Ag FAX:(805)302-2063 FAX-(209)042-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-B435 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. Th'i Slanda)"I /A Okf°o 100 Ir'r7;r Client Name: FGL Environmental, Inc. Analytical Report: Page 1 of 23 Contact: Cindy Aguirre Project Name. No Project Address: 853 Corporation Street Project Number: SP 2017388 Santa Paula, CA 93060 Report Date' 25-Feb-2021 Work Order Number: COL2171 Received on[cc(YIN): YCs Temp: 6 °C Attached is the analytical report for the sam pie(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 Ry Date Submitted COL2171-01 YVVV-10 Centrifuge Cake Solid 12/14/20 0:00 OPSILDSIKU 1 2117/20 1 2:26 GLS Composite Included in this Data Package please rind an amended report for the work order referenced below. Work Order: COL2171 Reason for Amendment: This report was reissued to correct the project number. This report supersedes the report issued on 31-Dec-2020. m,11K219 &,ca6vf+ P 951 653 3351 CA EE W No.2698 P,O Box 1:32 6100 Quail Valley Court F 951 65)3 1662 EPA No,CAOO 102 Riverside,CA 92502-0433 Hiversidc,CA 92-507-0704 w'ww.babcocklabb.coui NKLAY No.OR4035 LACSD ND. 10119 0400 BABCCCK Laboratories, Inc. Client Name. FGL Environmental, Inc. Analytical Report. Page 2 of 23 Contact. Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2017388 Santa Paula,CA 93060 Work Order Number: COL21711 Report Cate: 25-Feb-2021 Reccived on Ice(YIN): Yes Temp: 6 °C Laboratory Reference Number COL2171-01 Sample Description Matrix Sampled Date/7ime Received Dateffime WW-10 Centrifuge Cake Solid 12/14/20 00.00 12/17/20 12:26 Analyte(s) Result RDL Units Method Analysis Date Analyst Flag Organoehlorine Pesticides and PCBs by EPA 8000 Series 4,4'-DD❑ N❑ 100 uglkg EPA 8081A 12/28/20 21:38 LLU N_RLm 4,4'-DDE N❑ 75 uglkg EPA 8081A 12/28/20 21:38 LLU N_RLm 4,4'-DDT N❑ 100 uglkg EPA 8081A 12/28/20 21:38 LLU N_RLm, NCALIm a-BHC ND 100 uglkg EPA 8081A 12/28/20 21:38 LLU N_RLm Aldrin ND 50 uglkg EPA 8081A 12128/20 21:38 LLU N_RLm b-BHC ND 100 uglkg EPA 8081A 12/28/20 21:38 LLU N_RLm Chlordane ND 620 uglkg EPA 8061A 12128/20 21:38 LLU N_RLm d-BHC ND 180 uglkg EPA 8081A 12128/20 21:38 LLU N_RLm ❑ieldrin ND 75 uglkg EPA 8081A 12/28/20 21:38 LLU N_RLm, NCALInd Endosulfan I ND 75 uglkg EPA 8081A 12/28/20 21:38 LLU N_RLm, NCALInd Endosulfan 11 ND 100 uglkg EPA 8051A 12/28/20 21:38 LLU N_RLm Endosulfan Sulfate N❑ 250 uglkg EPA 8061A 12/28/20 21:38 LLU N_RLm, NCALInd Endrin ND 75 uglkg EPA 8081A 12/28/20 21:38 LLU N_RLm, NCALInd Endrin Aldehyde ND 180 uglkg EPA 8081A 12/28/20 21:38 LLU N_RLm, NCALInd Heptachlor ND 75 uglkg EPA 8081A 12128/20 21:38 LLU N_RLm Heptachlor Epoxide ND 75 uglkg EPA 8081A 12128/20 21:38 LLU N_RLm, NCALInd Hexachlorobeniene ND 1000 uglkg EPA 8081A 12/28/20 21:38 LLU N_RLm Lindane ND 100 uglkg EPA 8081A 12/28/20 21:38 LLU N_RLm Methoxychlor N❑ 680 uglkg EPA 8081A 12/28/20 21:38 LLU N_RLm, NCALlm Toxaphene N❑ 2000 uglkg EPA 8081A 12/28/20 21:38 LLU N_RLm Aroclor 1016 ND 7500 uglkg EPA 8082 12/28/20 17:55 LLU Aroclor 1221 ND 7500 uglkg EPA 8082 12/28/20 17:55 LLU Aroclor 1232 N❑ 7500 uglkg EPA 8082 12/28120 17:55 LLU Aroclor 1242 N❑ 7500 uglkg EPA 8082 12/28/20 17:55 LLU Aroclor 1248 ND 7500 uglkg EPA 8082 12/28/20 17:55 LLU Aroclor 1254 ND 7500 uglkg EPA 8082 12/28/20 17:55 LLU Aroclor 1260 ND 7500 uglkg EPA 8082 12/28/20 17:55 LLU 1INvifing P 9151615.3 3351 CA 1?1.AP no.2008 P-O Box 432 6 10 0 Qkiail Valley Cuurt F 951 653 1GG2 EPA No-CA00102 Rivcraid(,.CA 92502-0 M Riverside.CA 92507-0704 wivw.babcockIabs.com ItiF.I.AP No.OR 103.5 LACSD No.10119 000 BABCOCK Laboratories, Inc. I11r.S'lrulr1r711++I1S1ee11r11o:/Qt 0"r'r 100 lairs Client Name: FGL Environmental, Inc. Analytical Report: Page 3 of 23 Contact: Cindy Aguirre Project Name: No Project Address. 853 Corporation Street Project Number: SP 2017388 Santa Paula, CA 93060 Report Date: 25-Feb-2021 Work Order Number: COL2171 Rcccivcd on Iec(YIN): Yes TcmP: 6 °C Laboratory Reference Number COL2171-01 Sample Description Matrix Sampled DatelTime Received DatelTime WW-10 Centrifuge Cake Solid 12/14/20 00:00 12/17/20 12:26 Analyte(s) Result RDL Units Method Analysis Date Analyst Flag Organochlorine Pesticides and PCBs by EPA 8000 Series Surrogate:Decachlorobfpheayl 5596 10-216 EPA 8081A 12/28/20 21:38 LLU N RLm Surrogate:Decachlorobiphenyl 80% 10-158 EPA 8082 12/28/20 17:55 LLU Semivolatile Organic Compounds by EPA 8270C 1,2,4-Trichlorobenzene ND 10 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm 1,2-❑ichlorobenzene ND 10 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm 1,2-❑iphenylhydrazine ND 10 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm 1,15-Trinitrobenzene ND 10 mglkg EPA 8270C 12/24/2019:38 MOF N_RLm 1,3-❑ichlorobenzene ND 10 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm 1,4-❑ichlorobenzene N❑ 10 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm 2,4,6-Trichlorophenol N❑ 10 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm 2,4-Dichlorophenol N❑ 10 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm 2,4-Dimethylphenol ND 10 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm 2,4-Dinitrophenol ND 50 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm 2,4-Dinitrotoluene ND 10 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm 2,6-Dichlorophenol ND 10 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm 2,6-Dinitrotoluene N❑ 10 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm 2-Chloronaphthalene N❑ 10 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm 2-Chlorophenol ND 10 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm 2-Methyl-4,6-Dinitrophenol ND 50 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm 2-Nitrophenol N❑ 10 mglkg EPA 8270C 12/24120 19:38 MOF N_RLm 2-Picoline ND 10 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm 3,3'-Dichlorobenzidine ND 10 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm 4,4'-DDD N❑ 10 mglkg EPA 8270C 12124120 1 T38 MOF N_RLm 4,4'-DDE N❑ 10 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm 4,4'-DDT ND 10 mglkg EPA B270C 12/24/20 19:38 MOF N_RLm 4-Bromophenyl phenyl ether ND 10 mglkg EPA B270C 12/24/20 19:38 MOF N_RLm 4-Chloro-3-methyiphenol N❑ 10 mglkg EPA 8270C 12/24/20 19 38 MOF N_RLm 4-Chlorophenyl phenyl ether N❑ 10 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm 4-Nitrophenol ND 100 mglkg EPA B270C 12/24/20 19:38 MOF N_RLm a-BHC ND 10 mglkg EPA B270C 12/24/20 19:38 MOF N_RLm Acenaphthene ND 10 mglkg EPA B270C 12/24/20 19:38 MOF N_RLm ureerlirr, kce iur+ P.9516533351 CA ELAP No '?698 PD Box 43! fi100 Quail Vallcy Court F 9,51 6-53 1662 KP.A No.OA00102 Hi�erside,CA 9?-502-0432 H.i�erside,C 192;i[]7 07[11 www.babcocklabs.com NE LP No.OR40'.35 LAC ST)ND, 10119 0100 BABCOCK Laboratories, Inc. 7hf .57r+ndwd of I-,.krvlhwr t-/ni Oe er 100 1�ru� Client Name: FGL Environmental, Inc. Analytical Report: Page 4 of 23 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2017388 Santa Paula,CA 93060 Work Order Number: COL2171 Report Date: 25-Feb-2021 Received on Ice(YIN): Yes Temp: 6 °C Laboratory Reference_Number COL217i-D1 Sample Description Matrix Sampled DatelTim_e_ Received Date/Time WW-10 Centrifuge Cake Solid 12114/20 00:00 12/17/20 12:26 Analyte(s) Result RDL Units Method Analysis Date Analyst Flag 5emivolatile Organic Compounds by EPA 8270C Acenaphthylene N❑ 10 mglkg EPA 8270C 12124/20 19:38 MOF N_RLm Aldrin N❑ 10 mglkg EPA 8270C 12124/20 19-38 MOF N_RLm Anthracene ND 10 mglkg EPA 8270C 12/24/20 19-38 MOF N_RLm Aroclor 1016(screen) ND 50 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm Aroclor 1221 (screen) ND 50 mglkg EPA 8270C 12/24/20 19-38 MOF N_RLm Aroclor 1232(screen) ND 50 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm Aroclor 1242(screen) ND 50 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm Aroclor 1248(screen) ND 50 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm Aroclor 1254(screen) ND 50 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm Aroclor 1260(screen) ND 50 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm b-BHC ND 10 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm Benzidine ND 100 mglkg EPA 8270C 1 2124/20 19:38 MOF N PPC, N_RLm, NCALhN❑ Benzo(a)anthracene ND 10 mglkg EPA 8270C 12/24/20 19:38 MOF N—RLm Benzo(a)pyrene N❑ 10 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm Benzo(b)fluoranthene N❑ 10 mglkg EPA 8270C 1 2124120 19:38 MOF N_RLm Benzo(ghi)perylene N❑ 10 mglkg EPA 8270C 12124120 19:38 MOF N_RLm Benzo(k)fluoranthene ND 10 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm, NCALhN D Bis(2-chioroethoxy)methane ND 10 mglkg EPA 8270C 1 2124120 19:38 MOF N—RLm Bis(2-C h to roethyl)et he r ND 10 mgAg EPA 8270C 1 2/24120 19:38 MOF N_RLm Bis(2-chloroisopropyl)Ether N❑ 10 mglkg EPA 8270C 12124120 19:38 MOF N_RLm, NCALhND Bis(2-ethylhexyl)phthalate N❑ 10 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm Butyl benzyl phthalate N❑ 10 irri EPA 8270C 1 2124/20 19:38 MOF N_RLm Chlordane(screen) ND 50 rri EPA 8270C 12124120 19:38 MOF N_RLm Chrysene NO 10 mglkg EPA 8270C 12124120 19:38 MOF N_RLm d-BHC N❑ 10 mgAg EPA 8270C 12124120 19:38 MOF N_RLm ❑ibenzo(a,h)anthracene N❑ 10 irri EPA 8270C 12/24/20 19:38 MOF N_RLm ❑ieldrin ND 10 rri EPA 8270C 12124120 19:38 MOF N_RLm Diethyl phthalate ND 10 rri EPA 8270C 12124120 19:38 MOF N_RLm ❑imethyl phthalate NO 10 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm mo lifig 10CQtion P 951653 3351 CA EL.AP No-2698 P.0 Leos 13.2 6100 QLiaiI Val Icy C OLIPt F 951653 1662 EPA No.CA00102 Mvergide,C.a 92502-0•1:32 Riverside,CAL 9250-0701 www,bahmeklahs.com NELAP No.OR4035 LAC SD No. 10119 000 BABCOCK Laboratories, Inc. '117r.Slam in—r1),011, r ''ri Q o- 100 !?m Client Name: FGL Environmental, Inc- Analytical Report. Page 5 of 23 Contact: Cindy Aguirre Project Name: No Project Address. 853 Corporation Street Project Number. SP 2017388 Santa Paula, CA 93060 Work Order Number: COL2171 Report Date. 25-Feb-2021 Received on Ice(YIN): Ycs 'Temp: G `C Laboratory Reference Number COL2171-01 sample description Matrix Sampled Date/Time Received Date/Time WIN-10 Centrifuge Cake Solid 12/14/20 00:00 12/17/20 12:26 Analyse(s) Result RDL Units Method Analysis Date Analyst Flag Semivolatile Organic Compounds by EPA 5270C Di-n-butylphthalate NO 10 mglkg EPA 8270C 12r24120 19:38 MOF N-RLm Di-n-octylphthalate NO 10 mglkg EPA 8270C 12/24/20 19:38 MOF N-RLm Endosulfan I NO 10 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm, NCALhN❑ Endosulfan II NO 10 mglkg EPA 82700 12/24/20 19:38 MOF N-RLm Endosulfan Sulfate NO 10 mglkg EPA 82700 12/24/20 19:38 MOF N-RLm Endrin NO 10 mglkg EPA 82700 12/24/20 19:38 MOF N-RLm Fluoranthene NO 10 mglkg EPA 82700 12/24/20 19:38 MOF N-RLm Fluorene NO 10 mglkg EPA 82700 12/24/20 19:38 MOF N-RLm Heptachlor NO 10 mglkg EPA 8270C 12/24/20 19:38 MOF N-RLm Heptachlor Epoxide ND 10 mglkg EPA 8270C 12/24/20 19:38 MOF N-RLm Hexachlorobenzene NO 10 mglkg EPA 8270C 12/24/20 19:38 MOF N-RLm Hexachlorobutadiene NO 10 mglkg EPA 8270C 12r24120 19:38 MOF N-RLm Hexachlorocyclopentadiene NO 500 mglkg EPA 8270C 12/24/20 19:38 MOF N-RLm Hexachloroethane N❑ 10 mglkg EPA 82700 12/24/20 19:38 MOF N-RLm Indeno(1,2,3-eftyrene NO 10 mglkg EPA 82700 12/24/20 19:38 MOF N_RLm isophorone NO 10 mglkg EPA 82700 12/24/20 19:38 MOF N_RLm Naphthalene NO 10 mglkg EPA 8270C 12/24/20 19'38 MOF N_RLm Nitrobenzene NO 10 mglkg EPA 8270C 12124/20 19:38 MOF N_RLm N-Nitrosodi-n-propylamine NO 10 mglkg EPA 8270C 12/24/20 19:38 MOF N_RLm N-Nitrosodimethylamine NO 10 mglkg EPA 82700 12/24/20 19:38 MOF N_RLm, NCALhND N-Nitrosodiphenylamine NO 10 mglkg EPA 8270C 12/24/20 19:38 MOF N-RLm Pentachlorophenol ND 100 mglkg EPA 8270C 12/24/20 19:38 MOF N-RLm Phenanthrene NO 10 mglkg EPA 8270C 12/24/20 19:38 MOF N-RLm Phenol NO 10 mglkg EPA 8270C 12/24/20 19:38 MOF N-RLm Pyrene NO 10 mglkg EPA 8270C 12/24/20 19:38 MOF N-RLm Toxaphene(screen) NO 50 mglkg EPA 8270C 12/24/20 19:38 MOF N-RLm y-BHC NO 10 mglkg EPA 8270C 12r24120 19:38 MOF N_RLm Surrogate:246-Trrbmmophenol 59% 10-122 EPA 8270C 12/24/20 19:38 MOF N-RLm Surrogate:2-Fluorobiphenyl 44% 10-409 EPA 8270C 12/24/20 19:38 MOF N RLm Surrogate:2-Fluornphenol 32% 10-96 EPA 8270C 12/24/20 19:38 MOF N RLm rnuilrrr lrr.:7tkur P 951 GS3.3351 CA El-AP Nci,2698 P.O Box d3'2 6100[wail"'alley Cain•1 F 951653 1GG'2 EPA No.CA00102 I;.iverside,CA 92502-0,1:32 Riverside,CA 92507•0704 www.bibeocklahu-i in NELAP Nn.0R10:35 LACSD No.10119 000 BABCOCK Laboratories, Inc. 11r,S'Ir ndrr+rr r+rFi err rer,lnr [}'r r 100 J ruEa Client Name: FGL Environmental, Inc. Analytical Report: Page 6 of 23 Contact. Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2017388 Santa Paula, CA 93060 Work Order Number: COL2171 Report Date: 25-Feb-2021 Received on Ice(YIN): Yes Tcmp: 6 °C Laboratory Reference Number COL2171-01 Sample Description Matrix Sailed Date/Time Received DatelTime WW-10 Centrifuge Cake Solid 12/14/20 00:00 12/17/20 12:25 Analyte(s) Result RDL Units Method Analysis Date Analyst Flag Sennivolatile Organic Compounds by EPA 6270C Surrogate:4-Terphenyl-d14 61% 14-126 EPA 8270C 12124120 1 9:38 MDF N RLm Surrogate:Nitrobenzene-d5 36% 10-106 EPA 8270C 12124120 1 9:38 MQF N_RLm Surrogate:Phen01-d6 39% 10-103 EPA 8270C 1 2124120 1 9:38 MOF N RLm 1)2 72 f)g location P 9.S 1 653.331151 CA FLAP No-2698 P.O Box 432 6100 QLLaiI Va]ley Court F 951 653 1662 EPA No.CA00102 Riverside,0A 92502-04:32 Riverside.CA 92507.0704 www.habeocklabs,com ItiEL1W No.OR4035 LACSf1 No. 10119 060 BABCOCK Laboratories, Inc. �!]t'•�1 r7!]lJr[l�-(�U'f,.lr't'ljt'Y1!r''ri((]'t'7'.�V II �['[II"L Client Name FGL Environmental, Inc. Analytical Report: Page 7 of 23 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2017388 Santa Paula,CA 93060 Work Order Number: COL2171 Report Date: 25-Feb-2021 Received on Ice(YIN): Yes Temp: 6 °C ❑rganochlorine Pesticides and PCBs by EPA 8000 Series-Batch Quality Control Spike Source %REC RP❑ Analyte(s) Result RDL Units Level Result %REC Limits RP❑ Limit Flag Batch OL23086-EPA 3550B Blank(0L23086-BLK1) Prepared: 12/24/20 Analyzed: 12/28/20 Aroclor 1016 N❑ 300 uglkg Aroclor 1221 N❑ 300 uglkg Aroclor 1232 N❑ 300 uglkg Aroclor 1242 N❑ 300 uglkg Aroclor 1248 N❑ 300 uglkg Aroclor 1254 N❑ 300 uglkg Aroclor 1260 N❑ 300 uglkg Surrogate:2,4,5,6 365 uglkg 500 73 10-134 Tetrachloro-m-xylene Surrogate: 41.6 uglkg 500 83 10-158 Decachlomblphenyl LCS(OL23086-BS1) Prepared: 12/24/20 Analyzed: 12/28/20 Aroclor 1016 555 300 uglkg 667 83 478-122 Aroclor 1260 522 300 uglkg 667 93 48 3-127 Surrogate'2,4,5,6 401 uglkg 500 80 10-134 Tetrachloro-m-xylene Surrogate: 478 uglkg 500 96 10-158 Decachlorobiphenyl Matrix Spike(01_23086-MS1) Source:C01_2171-01 Prepared:12/24/20 Analyzed:12/28/20 Aroclor 1016 4120 7500 uglkg 667 ND NR 23-195 QMdil Aroclor 1260 ND 7500 uglkg 667 ND 13 5-134 QMdi1 Surrogate:2,4,5,6 37.8 uglkg 500 64 10-134 Tetrachloro-m-xylene Surrogate: 330 uglkg 50.0 88 10-158 Decachlorobiphenyl Matrix Spike Dup(0L23086-MSD1) Source:COL2171-01 Prepared:12/24/20 Analyzed'12/28/20 Aroclor 1016 N❑ 7500 uglkg 667 ND 23-195 42 QMdil Aroclor 1260 ND 7500 uglkg 667 N❑ 13.5-134 32 QMdil Surrogate:2,4,5,6 266 uglkg 500 53 10-134 Tetrachloro-m-xylene Surrogate: 324 uglkg 500 65 10.158 Decachlorobiphenyl wailing 11)r:atinn Y 9.51 663 3351 CA ELAP No.2698 P.O Sox 43.2 6100 QrJail Valley C 1)urt F 951 G53 1GG2 EPA No.CA00102 Riverside.CA 92502-0432 Riverside,GA 92507-0704 www•bahrncklahs"corn ItiELe1P No.OR4035 LACS 1)No. 101 1 D 0 @0 0 BABCOCK Laboratories, Inc. The 9rwrlmd of Et-fo4fiwfr(,Jiu Okcr 100 )ears Client Name: FGL Environmental, Inc. Analytical Report: Page 8 of 23 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2017388 Santa Paula, CA 93060 Report Date: 25-Feb-2021 Work Order Number: COL2171 Received on Ice(YIN): Yes Temp: 6 °C Organochlorine Pesticides and PCBs by EPA 8000 Series-Batch Quality Control Spike Source %REC RP❑ Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch OL23087-EPA 3550B Blank(OL23087-BLK1) Prepared.12/24/20 Anaiyxed:12/28/20 4,4'-DDD N❑ 4❑ uglkg 4,4'-DDE N❑ 30 uglkg 4,4'-DDT N❑ 40 uglkg a-BHC ND 4.0 uglkg Aldrin N❑ 2.0 uglkg b-BHC N❑ 40 uglkg Chlordane N❑ 25 uglkg d-BHC N❑ 70 uglkg Dieldrin N❑ 3.0 uglkg Endosulfan i N❑ 30 uglkg Endosulfan II N❑ 40 uglkg Endosulfan Sulfate N❑ 10 uglkg Endrin N❑ 30 uglkg Endrin Aldehyde ND 70 uglkg Heptachlor N❑ 30 uglkg Heptachlor Epoxide ND 30 uglkg Hexachlorobenzene ND 40 uglkg Lindane ND 40 uglkg Methoxychlor N❑ 27 uglkg Taxaphene N❑ 80 uglkg Surrogate: 35 uglkg 500 70 90-216 ❑ecachlomblphenyl LC5(OL23087-B51) Prepared: 12/24/20 Analyzed: 12/28/20 _ 4,4'-DDD 13 9 40 uglkg 167 83 49-111 4,4'-DDE 14 0 30 uglkg 167 B4 47-105 4,4'-DDT 14 3 40 uglkg 167 86 41-114 a-BHC 14 D 4.0 uglkg 167 84 27-109 Aldrin 131 20 uglkg 167 79 30-110 b-BHC 137 40 uglkg 167 82 32-119 d-BHC 147 7.0 ugNg 167 88 27-88 ❑leldrin 13.5 3.0 uglkg 167 81 48-106 Endosulfan 1 134 30 uglkg 167 80 39-107 Endosulfan 11 137 40 uglkg 167 82 35-115 Endosulfan Sulfate 13 5 10 uglkg 167 81 32-112 rnzuling luc'tivn P 951 653 3 1,5 1 CA ELAP No.2698 P.p Box 432 6 10 0 Quail Valley Court 1e 951 65:3 tG62 EPA No.CA00102 Piveroide,CA 92502-0432 Riverside,CA 92507-0704 www.bahcocklahs.com NETu1P No.OR4035 f.ACST)No. 10119 1@104D BABCOCK Laboratories, Inc. 74 0 rr 100 J E'r+r s Client Name: FGL Environmental, Inc- Analytical Report: Page 9 of 23 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2017388 Santa Paula,CA 93060 Work Order Number: COL2171 Report Date. 25-Feb-2021 Received on Ice(Y1N): Yes Temp: 6 T ❑rganochlorine Pesticides and PCBs by EPA 8000 Series-Batch Quality Control Spike Source %REC RPM Analyte(s) Result RDL Units Level Result %REC Limits RP❑ Limit Flag Batch OL23087-EPA 3550B LCS(0L23087-B51) Prepared: 12/24/20 Analyzed: 12/28/20 Endrin 142 30 uglkg 16.7 85 46-118 Endrin Aldehyde 126 70 uglkg 16.7 75 23-105 Heptachlor 145 30 uglkg 167 87 22-125 Heptachlor Epoxide 134 3 0 uglkg 16.7 80 40-108 Hexachierobenzene 13 8 40 uglkg 16.7 83 29-109 Lindane 13 9 40 uglkg 167 83 27-112 Methoxychlor 57 0 27 uglkg 66 7 86 45-123 Surmgate' 37 uglkg 300 73 10-216 Decachlombiphenyl Matrix Spike(QL23087-M51) Source:COL2171-01 Prepared: 12/24/20 Analyzed: 12/28/20 4,4'-DD❑ 117 100 uglkg 167 N❑ 70 14-149 4,4'-DDE 121 75 uglkg 167 N❑ 73 10-140 4,4'-DDT 174 100 uglkg 16.7 N❑ 105 10-138 a-BHC ND 100 uglkg 167 N❑ 27-99 QW11 Aldrin N❑ 50 uglkg 167 N❑ 40-92 OMdil b-BHC ND 100 uglkg 167 195 NR 15.130 QMdil d-BHC 25 5 180 uglkg 16.7 ND 153 10.98 QMdil ❑ieldrin 12 5 75 uglkg 16.7 ND 75 18.125 Endosulfan 1 102 75 uglkg 16.7 N❑ 61 16.127 Endosulfan 11 N❑ 100 uglkg 16.7 N❑ 29-108 ❑Mdil Endosulfan Sulfate N❑ 250 uglkg 167 N❑ 19-121 QMdil Endrin 25.3 75 uglkg 167 ND 152 24.127 QMdil Endrin Aldehyde ND 180 uglkg 16.7 ND 10-103 QMdil Heptachlor N❑ 75 uglkg 167 N❑ 10-125 QW1 Heptachlor Epoxide 156 75 uglkg 167 ND 84 46-101 Hexachlombenzene ND 1000 uglkg 167 ND 29.115 QMdil Lindane NO 100 uglkg 167 N❑ 20-108 ❑Mdii Methoxychior 235 680 uglkg 66.7 N❑ 35 10-157 surmgafe: 34 uglk8 500 68 i0-216 DecachloroWphenyl r++e+iliilg loo"2 rin P 961 G63 3 3 5 t CA Ef..1P No.2698 P.0 Box 432 6100 Quail Palley Court F 951 G53 1662 EP.k No.CA00102 Riyeraide,CA 92502-0,132 Riverside,C:k 92507-0704 www.baboncklshs,cnm NE1.e1P No.OR4035 LACSD No.10119 000 BABCOCK Laboratories, Inc. '171r.S'Inn&v d r j Ew-hUr nnf,l (J,n. /00 I;,(wv Client Name: FGL Environmental, Inc. Analytical Report: Page 10 of 23 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number SP 2017388 Santa Paula, CA 93060 Work Order Number: COL2171 Report Date: 25-Feb-2021 Rcceivcd on[cc(YIN); Yes Temp: 6 'C ❑rganochlorine 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 OL23087-EPA 3550B Matrix Spike Dup(OL23087-MSD1) Source:COL2171-01 Prepared:12/24/20 Analyzed:12/28/20 4,4'-DDD 116 100 uglkg 16.7 ND 70 14-149 0-6 40 4,4'-DDE 101 75 uglkg 16.7 ND 61 10-140 18 30 4,4'-DDT 20 1 100 uglkg 167 ND 121 10-138 14 40 a-BHC ND 100 uglkg 167 ND 27-99 30 Wdil Aldrin ND 50 uglkg 167 ND 40-92 30 nMdil h-BHC ND 100 uglkg 16.7 19.5 NR 15-130 0 40 nMdil d-BHC 23.7 180 uglkg 16.7 ND 142 10-98 7 30 ❑Mdil Dieldrin 10.2 75 uglkg 167 ND 61 18-125 20 25 Endosulfan I ND 75 uglkg 16.7 ND 18-127 20 ❑Mdil Endosulfan 11 ND 100 uglkg 16.7 ND 29-108 30 ❑Mdil Endosulfan SuVate ND 250 uglkg 16.7 ND 19-121 40 ❑Mdil Endrin 20.7 75 uglkg 16.7 ND 124 24-127 20 30 Endrin Aldehyde ND 160 uglkg 16.7 ND 10-103 50 ❑Mdil Heptachlor ND 75 uglkg 16.7 ND 10-125 30 ❑Mdil Heptachlor Epoxide 12.9 75 uglkg 16-7 ND 77 46-101 19 40 Hexachlorobenzene ND 1000 uglkg 16.7 ND 29-115 40 QMdil Lindane ND 100 uglkg 16.7 ND 20-108 40 QMdil Methoxychlor ND 560 uglkg 68.7 ND 10-157 40 oMdil Surmgate: 28 uglkg 50.0 57 10-216 Decachlorobiphenyl I rre�ili�r, If cidiVIA P 9.51653:3351 CA ELAP No.2698 P.O Box 1132 6100 6vluail Valley Coiu'L F 9531 653 1662 KPA No-CA00162 Riverside,CA 92502-0432 Hiverside,CA 92507.0704 www.babcocklabs.wTu NELAP No.OR4035 I.ACSD No. 10119 000 BABCOCK Laboratories, Inc. '1 h� Slawlarr'rri f..rr'vllr'm kl 0':.o. I00 J rxPri Client Name, FGL Environmental, Inc Analytical Report: Page 11 of 23 Contact' Cindy Aguirre Project Name: No Project Address. 853 Corporation Street Project Number: SP 2017388 Santa Paula, CA 93060 Work Order Number: COL2171 Report Date: 25-Feb-2021 Received on Ice[YIN]: Yes Temp: 6 "C Semivolatile Organic Compounds by EPA 8270C-Batch Duality Control Spike Source %nREC RP❑ Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch OL22075-EPA 3550B Blank(OL22075-BLK1) Prepared:12/22/20 Analyzed: 12/24/20 1,2,4-Trichlorobenzene ND 1-0 mglkg 1,2-Dichlorobenzene ND 1 0 mglkg 1,2-Diphenylhydrazine ND 10 mglkg 1,3,5-Trinitrobenzene ND 10 mglkg 1,3-Dichlorobenzene ND 1 0 mglkg 1,4-Dichlorobenzene ND 10 mgAg 2,4,6-Trichlorophenol ND 1-0 mglkg 2,4-Dichlorophenol ND 1-0 mglkg 2,4-Dimethylphenol ND 1-0 mglkg 2,4-Dinitrophenol N❑ 5 0 mglkg 2,4-0initrotoluene N❑ 10 mglkg 2,6-Dichlorophenol N❑ 1 0 mglkg 2,6-1)initrotoluene N❑ 1.0 mglkg 2-Chloronaphthalene N❑ 10 mglkg 2-Chlorophenol N❑ 1-0 mglkg 2-Methyl-4,5-Dinitrophenol N❑ 5-0 mglkg 2-Nitrophenol ND 10 mglkg 2-Picoline ND 1.0 mglkg 3,3'-Dichlorobenzidine ND 10 mglkg 4,4'-DD❑ N❑ 10 mglkg 4,4'-DDE N❑ 10 mglkg 4,4'-DDT ND 1-0 mglkg 4-Bromophenyi phenyl ether ND 1-0 mglkg 4-Chloro-3-methylphenol N❑ 10 mglkg 4-Chlorophenyl phenyl ether N❑ 1 0 mglkg 4-Nitraphenal ND 10 mglkg a-BHC N❑ 10 mglkg Acenaphthene ND 1.0 mglkg Aoenaphthylene ND 1.0 mglkg Aldrin ND 10 mglkg Anthracene N❑ 10 mglkg Aroclor 1016(screen) ND 50 mglkg Aroclor 1221 (screen) N❑ 50 mglkg Aroclor 1232(screen) N❑ 50 mglkg Aroclor 1242(screen) ND 5.0 mglkg ur�yilmg lnr:itlon P 951653 3351 CA EI.AF'Nn.2CS98 P.O Box 432 6100 quail Valley C'.QurL F 951 G53 1662 EPA No.CAO0102 Riverside.CA 92502-O432 Riverside.CA 9250i•0704 www.hahcocklahs.coni NELAl No.OR4035 LACSD No-10119 000 BABCOCK Laboratories, Inc. 7:be.i'I awknd V'EiceNem e fin-Oi'.o I V) I�rlas Client Name. FGL Environmental, Inc. Analytical Report: Page 12 of 23 Contact. Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2017388 Santa Paula,CA 93060 Work Order Number: COL2171 Report Date: 25-Feb-2021 Received on Ice(YIN): YCS Lernp: G °C Semirlolatile Organic Compounds by EPA 8270C -Batch Quality Control Spike Source %REC RP❑ Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch OL22075-EPA 3550E Blank[01_22075•13LKII Prepared:12/22/20 Analyzed 12/24/20 Aroclor 1248(screen) ND 5-0 mglkg Aroclor 1254(screen) ND 5 0 mglkg Aroclor 1260(screen) ND 5 0 mglkg b-BHC ND 10 mglkg Benzidine ND 10 mglkg Benzo(a)anthrecene ND 10 mglkg Benzo[a]pyrene ND 1-0 mglkg Benza[b]fluoranthene ND 10 mglkg Benza(ghi)perylene ND 1-0 mglkg Benzo(k)fluoranthene ND 10 mglkg Bis[2-chlorcethoxy]methane ND 1.0 mglkg Bis(2-Chloreethyl)ether ND 1❑ mglkg Bis[2-chlorcisopropyl]Ether ND 10 mglkg Bis[2-ethyIhexyl]phthalate ND 10 mglkg Butyl benzyl phthalate ND 1-0 mglkg Chlordane(screen) N❑ so mglkg Chrysene ND 10 mglkg d-BHC ND 10 mglkg Dibenzo[a,h]anthracene ND 10 mglkg Dieldrin ND 1❑ mglkg Diethyl phthalate ND 1 0 mglkg Dimethyi phthalate N❑ 1-0 mglkg Di-n-butyiphthalate ND 1-0 mglkg Di-n-octylphthalate ND 10 mglkg Endosulfan I ND 1 0 mglkg Endosulfan 11 N❑ 1 0 mglkg Endosulfan Sulfate ND 1❑ mglkg Endrin ND 1-0 mglkg Fluoranthene ND 1-0 mglkg Fluorene ND 10 mglkg Heptachlor ND 1❑ mglkg Heptachlor Epoxide ND 1❑ mglkg Hexa chic roben zene ND 10 mglkg Hexa chic robutadiene N❑ 10 mglkg Hem chic rocyclope ntad ien e ND 50 mglkg 111juling, lCM,."2 m P 951 653 3351 CA 13LAP No.2G98 P.0 Bux 432 6100 Q1tail Valley CourL F 951 653 1662 FPA No.CA00102 Riverside.CA 92502.0,132 Riverside.CA 92507-0704 www.babcockIabs-com Nf:LAP No-OR4035 LLCSD No. 10119 1@104D BABCOCK Laboratories, Inc. '17w Slrrrid(od ry-F..rr llrrlre/rir❑r'!er I UPI rrlr., Client Name: FGL Environmental, Inc- Analytical Report: Page 13 of 23 Contact. Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2017388 Santa Paula, CA 93060 Work Order Number: COL2171 Report Date: 25-Feb-2021 Received on Ice(Y/N)} Yes 'I ernp: 6 °C Semivolatile Organic Compounds by EPA 8270C-Batch Quality Control Spike Source %aREC RPD Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch OL22075-EPA 3550B Blank(OL22075-BLK1) Prepared-12122/20 Analyzed:12/24/20 Hexachloroethane ND 1.0 mglkg Indeno(1,2,3-cd)pyrene ND 1d] mglkg Isophorone ND 1.0 mglkg Naphthalene ND 1.0 mglkg Nitrobenzene ND 1.0 mglkg N-Nitrosodi-n-propylamine ND 10 mglkg N-Nitrosodimethylamine ND 1.0 mglkg N-Nitrosodiphenylamine ND 10 mglkg Pentachlorophenol ND 10 mglkg Phenanthrene ND 10 mglkg Phenol ND 1-0 mglkg Pyrene ND 1❑ mglkg Toxaphene[screen] ND 50 mglkg y-BHC N❑ 10 mglkg Surrogate: ND mglkg 250 65 10-122 2,4,6-Tribrnmophenol Surrogate,2-Fluorobiphenyl ND mglkg 167 70 10-109 Surrogate:2-Fluorophenai ND mglkg 250 68 10-96 Surrogate:4-Terphenyl-dl4 ND mgAg 167 84 14-126 Surrogate:Nitrobenzene-d5 ND mglkg 167 68 10406 Surrogate:Phenol-d6 ND mglkg 250 68 10-103 LCS(OL22075-BSI) Prepared:12/22/20 Analyzed:12/24/20 1,2A-Trichlorobenzene 2A2 1.0 mglkg 133 73 24-99 12-Dichlorobenzene 2.19 1.0 mglkg 3M 66 19-97 1,2-Diphenylhydrazine 2.48 1.0 mglkg 3.33 75 47-112 1,3,5-Trinitrabenzene Z55 1.0 mglkg 3.33 77 52-116 1,3-Dichlorobenzene 2.16 1.0 mglkg 3.33 65 13-95 1,4-Dichlorobenzene 2.14 1❑ mglkg 3.33 64 14-95 2,4,8-7richlorophenol 2.50 10 mglkg 3.33 75 38-113 2,4-Dichlorophenol 2.31 10 mglkg 3.33 69 32-109 2,4-Dimethylphenol 235 1❑ mglkg 3.33 71 33-108 2,4-Dinitrophenol 2.22 5❑ mglkg 3.33 67 33-120 2,4-Dinitrotoluene 274 1 0 mglkg 3.33 62 48-109 2,8-Dichlorophenol 2.39 10 mglkg 3.33 72 28-106 2,6-Dinitrotoluene 257 1 0 rrglkg 3.33 77 43-115 112dililry ]rr:26011 P 951 G53 3351 CA L,AP No.2698 P.0 Box 432 6100 Quail.Valley Court F 951 653 1662 EPA No.CA00102 Kivermde,CA 92502-04:32 Riverside,CA 92507.0104 .vww.babeockI abs.cnm NRi.AP No,01110 35 LAC'SD No. 10119 000 BABCOCK Laboratories, Inc. IA-.1'hrndald o/k r•elleno,,/Or Over l00 );,an Client Name FGL Environmental, Inc. Analytical Report: Page 14 of 23 Contact Cindy Aguirre Project Name: No Project Address. 853 Corporation Street Project Number SP 2017388 Santa Paula,CA 93060 Report Date: 25-Feb-2021 Work Order Number: COL2171 Rcccivcd on Ice(YIN): Ycs Temp: 6 'C Semivolatile Organic Compounds by EPA 8270C-Batch Quality Control Spike Source %REC RP❑ Analyte(s) Result RDL Units Level Result %REG Limits RPD Limit Flag Batch OL22075-EPA 3550B LCS(0L22075-BS1) Prepared:12/22/20 Analyzed:12/24/20 2-Chloronaphthalene 254 1 0 mglkg 333 76 29-111 2-Chlorophenol 225 1 0 mglkg 3 33 67 25-103 2-Methyl-4,6-Dinitrophenol 229 5 0 mglkg 333 69 46-114 2-Nitfophenol 2-44 1.0 mglkg 3-33 73 24-109 2-Picoline 183 1 0 mglkg 333 55 10-86 3,3'-❑ichlorobenzidine 2-28 1.0 mglkg 333 68 10-124 4,4'-DDD 289 1.0 mglkg 333 87 49-115 4,4'-DDE 287 1 0 mglkg 333 86 52-109 4,4'-DDT 288 1 0 mglkg 333 86 47-108 4-Bromophenyl phenyl ether 2-51 1 0 mglkg 333 75 45-110 4-Chloro-3-methylphenol 240 1 0 mglkg 333 72 42-111 4-Chlorophenyl phenyl ether 2.48 1.0 mglkg 3-33 74 42-106 4-Nitrophenol 2.69 10 mglkg 3-33 81 32-133 a-BHC 258 1 0 mglkg 333 77 47-104 Acenaphthene 2-51 1 0 mglkg 333 75 36-106 Acenaphthylene 2.48 1 0 mglkg 333 74 34-109 Aldrin 251 1 0 mglkg 333 78 45-110 Anthracene 2.55 1 0 mglkg 333 79 49-111 b-BHC 2-78 1.0 mglkg 3-33 83 53-103 Benzidine 1-15 10 mglkg 3-33 34 50-150 Mpc Benzo(a)anthracene 284 1 0 mglkg 333 85 52-111 Benzo(a)pyrene 297 1 0 mglkg 3-33 89 42-120 Benzo(b)fluoranthene 3 02 1❑ mglkg 333 91 40-122 Benzo(ghi)p"lene 296 1 0 mglkg 3.33 89 38-129 Benzo(k)fluoranthene 288 1 0 mglkg 333 87 43-119 Bis(2-chloroethoxy)methane 238 1 0 mglkg 3-33 71 29-105 Bis(2-Chloroethyl)ether 222 1 0 mglkg 333 67 14-103 3is(2-chloroisopropyl)Ether 219 1 0 mglkg 333 66 15-109 Bis(2-ethylhexyl)phthalate 291 1 0 mglkg 333 87 50-117 Butyl benzyi phthalate 290 1❑ mglkg 333 87 50-113 Chrysene 289 1 0 mglkg 333 87 53-112 d-8HC 277 1 0 mglkg 333 83 52-107 ❑ibenza(a,h)a nth race ne 2 88 1 0 mglkg 3-33 86 37-127 Dieldrin 278 1 0 mglkg 333 B3 52-108 Diethyl phthalate 263 10 mglkg 333 79 47-112 +uRilimw liut.7tinr P 9516,53 3351 CA EL LP No.2G88 P.O Sox 43.2 6100 Quail Valley Court F 951 653 1662 L:PA No,CA0010.2 Riverside,CA 92502-0 t:32 Riverside.CA 92507-0701 www•babcockla6s.coin NELAP No.0H4035 I,ACSD No. L0119 000 BABCOCK Laboratories, Inc. 'fhr.Shwodrlld of Ewpllm r Ao O]e.) 100 )rvlrr Client Name: FGL Environmental, Inc. Analytical Report: Page 15 of 23 Contact: Cindy Aguirre Project Name: No Project Address: 553 Corporation Street Project Number: SP 2017388 Santa Paula, CA 93060 Work Order Number: COL2171 Report Date: 25-Feb-2021 Rcccivcd on [cc(YIM1f); Yes 'Temp: fi "C 5enlivolatile 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 OL22075-EPA 3550B LC5(OL22075•B51) Prepared:12/22/20 Analyzed:12/24/20 Qimethyl phthalate 2.55 1 0 mglkg 3,33 77 45-112 Di-n-butylphthalate 2.95 10 mglkg 3.33 89 50-115 Di-n-octylphthalate 3.14 10 mglkg 3.33 94 44-119 Endosulfan 1 2.76 10 mglkg 3.33 83 42-112 Endosulfan II 2.76 1.0 mglkg 3,33 83 50-109 Endosulfan Sulfate 2.91 1❑ mglkg 3,33 87 56-113 Endrin 281 1❑ mglkg 3.33 84 41-112 Flucranthene 2.91 1.0 mglkg 3.33 87 52-111 Fluorene 2.53 1.0 mglkg 3.33 76 41-107 Heptachlor 2 55 1-0 mglkg 3.33 77 51-109 Heptachlor Epoxide 266 1.0 mglkg 3.33 80 53-107 Hexachlorobenzene 2 50 1 0 mglkg 3.33 75 45-109 Hexachiorobutadiene 241 1-0 mglkg 3.33 72 21-98 HexachiorocycJopentadiene 2.13 50 mglkg 3.33 64 10-124 Hexarhloroethane 2 05 1.0 mglkg 3.33 61 13-95 ndene(1,2,3-cd)pyrene 2 68 1.0 mglkg 3.33 86 36-128 sophorone 2.39 1.0 mglkg 3.33 72 31-105 Naphthalene 2.39 1.0 mglkg 333 72 18-107 Nitrobenzene 2.37 1.0 mglkg 333 71 19-106 N-Nitrosodi-n-propylamine 223 1-0 mglkg 333 67 21-108 N-Nitrosodimethylamine 245 1 0 mglkg 3.33 73 16-95 N-Nitrosodiphenylamine 5-09 1.0 mglkg 6.67 76 27-200 Pentachiorophenol 2.53 10 mglkg 3.33 76 34-127 Phenanthrene 2,67 10 mglkg 3.33 80 47-111 Phenol 2.19 1.0 mglkg 3,33 66 30-104 Pyrene 2 93 1-0 mglkg 3,33 88 52-114 y-BHC 2 61 1 0 mglkg 3.33 78 48-104 Surrogate: -- - 2-0 mglkg 2.50 81 10-122 2,4,6-Tribromophenol Surrogate:2-Fluorobiphenyl 1.2 mglkg 1.67 73 10409 Surrogate:2-Fluorophencl 1.7 mglkg 2.50 68 10-96 Surrogate:4-Terphenyl-d74 1,4 mglkg 1-87 86 14426 Surrogate rdr[robenrane-d5 1.2 mgNg 1-67 72 10-106 Surrogate:Phenol-d6 1.8 mglkg 2-50 71 10-103 717N11177,{ loualiun P 9516.53 3351 CA ELAP No.2G98 P.0 Rns 1:32 6 10 0 Quail Valley Coux F 951 653 1882 HPA No.CAOO 102 Riverside,Ca 92502-0432 lbvemde,CA 92507-0704 ww'w,babcocktabs.00m NELAF No.❑R4035 LACSD No. 10119 1@ 0 0 BABCOCK Laboratories, Inc. 7 h,,.51widurd i f Fu 4erne I r Q,c� 100 1[cur ti Client Name: FGL Environmental, Inc. Analytical Report: Page 16 of 23 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2017388 Santa Paula, CA 93060 Work Order Number: COL2171 Report Date: 25-Feb-2021 Received on Ice[YIN]: Yes Temp: 6 °C 5emivolatile Organic Compounds by EPA 8270C-Batch Quality Control Spike Source %REC RPD Anaiyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch OL22075-EPA 3550E Matrix Spike(OL22075-M51) Source:COL1969.01 Prepared:12/22/20 Analyzed:12/24/20 1,2,4-Trichlorobenzene 2 39 1.0 mglkg 333 NO 72 10-100 1,2-Dichlorobenzene 2.14 1.0 mglkg 3.33 NO 64 10-99 1,2-Dipheny1hydrazine 2.54 1.0 mglkg 3.33 NO 76 17-128 1,3,5-Trinitrobenzene 251 1❑ mglkg 333 NO 75 10-180 1,3-Dichlorcbenzene 209 10 mglkg 3.33 NO 63 10-94 1,4-Dichlorobenzene 211 1.0 mglkg 333 NO 63 10-93 2,4,8-T rich Iorophenol 262 1 0 mglkg 333 NO 79 29-117 2,4-Dichlorophenol 241 1.0 mglkg 3.33 NO 72 19-110 2,4-❑imethylphenol 242 1❑ mglkg 333 NO 73 18-111 2,4-❑initrophenol 139 50 mglkg 333 NO 42 29-119 2,4-❑initrotcluene 274 1.0 mglkg 3.33 NO 82 10-150 2,6-❑ichlaraphenol 249 1 0 mglkg 333 NO 75 10-113 2,6-Dinitrotoluene 261 1.0 mglkg 333 NO 78 29-117 2-Chloronaphthalene 262 1❑ mglkg 333 NO 79 10-200 2-Chlorophenoi 221 1❑ mglkg 333 NO 85 11-102 2-Methyl-4,6-❑initrnphenol 203 5❑ mglkg 333 NO 81 10-125 2-Nitrophenol 2.53 1.0 mglkg 3.33 NO 78 12-105 2-Picaline 1.78 1.0 mglkg 333 NO 53 10-69 30-Dichlorobenzidine 257 1.0 mglkg 3.33 NO 77 10-113 4,4'-DDD 286 1 0 mglkg 333 NO 86 10-164 4,4'-DDE 286 1.0 mglkg 333 NO 85 14-138 4,4'-DDT 295 1 0 mglkg 333 NO 88 10-135 4-Bromophenyl phenyl ether 262 1.0 mglkg 333 NO 79 30-117 4-Chloro-3-rnethylphenol 253 1.0 mglkg 3.33 ND 76 30-115 4-Chlorophenyl phenyl ether 257 1.0 mglkg 3.33 NO 77 26-115 4-Nitrophenol 271 10 mglkg 333 NO 81 14-147 a-BHC 265 1 0 mglkg 333 ND 80 15-129 Acenaphthene 255 1❑ mglkg 333 NO 77 22-112 Acenaphthylene 254 1❑ mglkg 333 NO 76 22-114 Aldrin 259 1.0 mglkg 3.33 NO 78 10-127 Anthracene 272 1.0 mglkg 3.33 NO 82 30-122 b-BNC 286 1❑ mglkg 3.33 NO 86 21-122 Benzidine 1 66 10 mglkg 333 NO 50 50-150 Benzo(a)anthracene 285 1 0 mglkg 333 NO 86 10-155 Benzo(a)pyrene 291 1 0 mglkg 333 NO 87 10-132 IM-211117(; 10CJIt1ol] P 951 6�i3 33.5 1 CA ELt1P No-2698 P.0 box 432 61 DO fauait Valley(ourt F 9516.33 1662 EPA No.CA00102 Riverside.CA 92502.0432 Riverside,CA 92507-D704 www.habcocklabs.com NELAP No.OR4035 Lr1CS1)No. 101 t9 10100 BABCOCK Laboratories, Inc. J11''.Y'V; O v? 11N1 J r'r77 r Client Name: FGL Environmental, Inc. Analytical Report Page 17 of 23 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number SP 2017388 Santa Paula, CA 93060 Work Order Number: COL2171 Report Date: 25-Feb-2021 Rcccived on Ice(YIN): Yes 'hemp: 6 °C: Semivolatile Organic Compounds by EPA 8270C-Batch Quality Control Spike Source %REC RPD Analyte(s) Result RDL Units Level Result %REC Limits RP❑ Limit Flag Batch OL22075-EPA 3550B Matrix Spike[0L22075-MS1] Source:COL1959-01 Prepared:12/22/20 Analyzed:12/24120 Benzo[b]fluoranthene 2.96 1.0 mglkg 3.33 ND 89 10-146 Benzo[ghi]perylene 288 1 0 mglkg 333 ND 86 16-122 Benzo(k)fluoranthene 280 1.0 mglkg 333 ND 54 27-115 Bis(2-chloroethoxy)methane 2.39 1 0 mglkg 333 ND 72 13-105 Bis(2-Chloroethyl)ether 2 20 1 0 mglkg 333 ND 66 10-97 Bis[2-chIoroisopropyl]Ether 2.14 1 0 mglkg 333 ND 64 10-100 Bis(2-ethylhexy1)phtha1ate 2.94 1.0 mglkg 3.33 ND 88 20-143 Butyl benzyl phthalate 2 92 1 0 mglkg 333 ND 88 19-148 Chrysene 2.85 1.0 mglkg 3.33 ND 86 10-150 d-BHC 2.79 1❑ mglkg 3.33 ND 84 22-124 ❑ibenzo(a,h)a nth race ne 2 80 1❑ mglkg 333 ND 84 24-116 ❑ieldrin 2.79 1 0 mglkg 333 ND 84 10-200 Diethyl phthalate 2 71 1.0 mglkg 333 ND 81 31-119 ❑imethyl phthalate 260 1.0 mglkg 333 N❑ 73 29-113 Di-n-butylphthalate 2.95 1.0 mglkg 3.33 N❑ 88 10-183 Di-n-octylphthalate 313 1.0 mglkg 3.33 N❑ 94 10-171 Endosulfan 1 269 1.0 mglkg 3 33 N❑ 81 10-200 Endosulfan 11 291 1.0 mglkg 333 N❑ 87 18-125 Endosulfan Sulfate 2 90 1 0 mglkg 333 ND 87 10-194 Endrin 2 93 1.0 mglkg 333 ND 88 10-179 Fluoranthene 292 1.0 mglkg 333 ND 88 10-165 Fluorene 2.59 1.0 mglkg 333 N❑ 78 24-116 Heptachlor 2.71 1.0 mglkg 3.33 N❑ 81 10.131 Heptachlor Epoxide 273 1❑ mglkg 333 ND 82 21-124 Hexachlorobenzene 263 1❑ mglkg 333 ND 79 20-123 Hexachlorobutadiene 244 1 0 mglkg 333 N❑ 73 10-98 Hexachlorocyclopentadiene 2 15 50 mglkg 333 ND 64 10-93 Hexachloroethane 194 1.0 mglkg 3.33 N❑ 58 10-86 Indeno(1,2,3-cd)pyrene 2.79 1.0 mglkg 3.33 N❑ 84 19-121 Isophorane 249 1 0 mglkg 333 N❑ 75 15-105 Naphthalene 240 1 D mglkg 333 ND 72 10-104 Nitrobenzene 244 1 0 mglkg 333 N❑ 73 10-103 N-Nitrosodi-n-propylamine 225 1 0 mglkg 333 N❑ 67 10-105 N-Nitrosodimethylamine 242 1 0 mglkg 333 N❑ 73 10-67 N-N itrosod i ph enylam i n e 531 1 0 mglkg 5 57 N❑ 80 10.200 112'.l ng IocI[io1, P 951603 3361 CA ELAP No.2698 P.0 Box 43.2 6t00 Qitail Vallcy[;urrrt F 951[ilia 1662 KPA No.CAOO102 Riverside.(A 9250`-0 1:32 Riverside,C'A 92507.0704 www.babcooklabs.eom NL;UP No.OR4035 LAC SD Nn. 10119 0 @0 0 BABCOCK Laboratories, Inc. 'I k.S7rindaid uj E: (c16:u(,,,,JW 0?-o /01) J irl+s Client Name: FGL Environmental, Inc Analytical Report: Page 18 of 23 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2017388 Santa Paula,CA 93060 Work Order Number: COL2171 Report Date. 25-Feb-2021 Received an Ice(YIN): Yes Tcnip: 6 T Semivolatile Organic Compounds by EPA 8270C-Batch Quality Control Spike Source %REC RP❑ Analyte(s) Result RUL Units Level Result °DREG Limits RP❑ Limit Flag Batch OL22075-EPA 3550B Matrix Spike(OL22075-MS1) Source:COL1959-01 Prepared:12/22/20 Analyzed: 12/24/20 Pentachlerophenol 2 50 10 rnglkg 333 N❑ 75 10-200 Phenanthrene 272 1 0 mglkg 3.33 NO 82 26-121 Phenol 222 1 0 mglkg 333 N❑ 67 11-108 Pyrene 296 1❑ mglkg 333 ND 89 10-155 y-BHC 267 1.0 mglkg 3.33 ND 80 16-121 Surrogate: 2.1 mglkg 2.50 83 10-122 2,4,6-Tribromophencl Surrogate:2-Fluorobiphenyl 12 mglkg 167 75 10-109 Surrogate:2-Fluorophenol 17 mglkg 2.50 fib 10-96 Surmgate:4-Terphenyl-d14 15 mglkg 1.67 67 14-126 Surrogate:Nrtrobenzene45 12 mglkg 1,67 72 10-106 Surrogate:Phenol-d6 1.8 mglkg 2-50 70 10-103 Matrix Sptke Dup(0"207b-INS01) _ Source:COL1959-0_1 Prepared:12/22/20 Analyzed: 12/24/20 1,2,4-Trichlorobenzene 1.75 10 mglkg 333 NO 52 10-100 31 40 1,2-Dichlorobenzene 1-52 10 mglkg 3.33 NO 45 10-99 34 60 1,2-Diphenylhydrazine 2-45 1❑ mglkg 3.33 NO 73 17-128 4 60 1,3,5-7rinitrobenzene 2.43 10 mglkg 3.33 NO 73 10-180 3 50 1,3-Dichlorobenzene 1.48 10 rnglkg 333 NO 45 10-94 34 50 1,4-Dichlorobenzene 1.46 10 mglkg 333 NO 44 10-93 36 40 2,4,6-Trichlorophenol 2A3 10 mglkg 3.33 NO 73 29-117 a 60 2,4-Dichlorophenol 1-96 10 mglkg 3,33 NO 59 19-110 21 40 2,4-Dimethylphenol 199 10 mglkg 333 NO 60 18-111 19 40 2,4-Dinitrophenol 1 03 50 mglkg 333 NO 31 29-119 30 60 2,4-Dinitrotoluene 271 1❑ mglkg 3.33 NO 61 10-150 1 40 2,6-Dichlorephenol 1-99 1.0 mglkg 333 NO 60 10-113 22 60 2,6-Dinitratoluene 255 1 0 mglkg 3,33 NO 76 29-117 2 50 2-Chloronaphthalene 220 1 0 mglkg 3.33 NO 66 10-200 18 60 2-Chlorophenol 164 10 mglkg 3,33 ND 49 11-102 30 40 2-Methyl-4,6-Dinitrophenol 1.76 5.0 mglkg 3.33 NO 53 10-126 14 60 2-Nitrophenol 1.61 1-0 mglkg 3.33 NO 54 12-106 33 60 2-Picoline 120 1.0 mglkg 3,33 NO 36 10-69 39 60 3,3'-Dichlorobenzidine 278 1.0 mglkg 3.33 NO 83 10-113 8 60 4,4'-DDD 2.80 1-0 mglkg 3.33 NO 84 10-154 2 60 4,4'-DDE 2.62 10 mglkg 333 NO 85 14-138 1 60 4,4'-DDT 2.84 1.0 mglkg 3-33 NO 85 10-135 4 60 mallilig P 9.51653 3351 CA 1,3.AP No-2698 P.D Box 432 G100 QLZait Valley CC]11rt F 951653 1GG2 EPA No.CA00102 Riyek'side.CA 92.502-0,1:32 Riverside.CA 924507•[1"i 04 www,bahcncklah.q.coni NFLaV No.0114035 LAC Sll No. 10119 000 BABCOCK Laboratories, Inc. 'lir .S?::nd(nd of j.<<r'Ir,vr1:r fb',; /0O )rrn'ti Client Name: FGL Environmental, Inc. Analytical Report: Page 19 of 23 Contact: Cindy Aguirre Project Name: No Project Address. 653 Corporation Street Project Number: SIP 2017388 Santa Paula, CA 93060 Work Order Number: COL2171 Report Date. 25-Feb-2021 Received on Ice(YIN): Yes Temp: G 'C Semivolatile Organic Compounds by EPA 8270C -Batch Duality Control Spike Source %REC RPM Analyte(s) Result RDL Units Level Result %REC Limits RP❑ Limit Flag Batch OL22075-EPA 35508 Matrix Spike pup(OL22075-MSD1) Source:C01-195"'! Prepared:12/22/20 Analyzed:12/24/20 4-Bromaphenyl phenyl ether 2 53 1.0 mglkg 3 33 ND 76 30-117 3 60 4-Chlora-3-methylphenol 2 32 1.0 mglkg 333 ND 70 30-115 9 40 4-Chlorophenyl phenyl ether 243 1.0 mglkg 333 ND 73 26-115 5 60 4-Nitrophenol 267 10 mglkg 333 ND 80 14-147 1 40 a-8HC 2,59 1.0 mglkg 333 ND 78 15-129 2 60 Acenaphthene 233 1.0 mglkg 3.33 ND 70 22-112 9 40 Acenaphthylene 2,31 1'0 mglkg 3.33 ND 69 22-114 10 60 Aldrin 262 1.0 mglkg 333 ND 79 10-127 1 60 Anthracene 264 1.0 mglkg 333 ND 79 30-122 3 60 b-BHC 2.81 1.0 mglkg 333 N❑ 84 21-122 2 60 Benzidine 184 10 mglkg 333 N❑ 55 50-150 10 60 Benzo(a)anthracene 283 1.0 mglkg 333 N❑ 85 10-155 ❑6 60 Benzo(a)pyrene 2,94 1.0 mglkg 3.33 N❑ 88 10-132 ❑6 60 Benzo(b)fluoranthene 2.98 1.0 mglkg 333 N❑ 89 10-148 ❑6 60 Benzo(ghi)perylene 2 92 1.0 mglkg 3.33 N❑ 88 18-122 2 60 Benzo(k)fIuoran then e 280 1.0 mglkg 333 ND 84 27-115 0.05 e0 Bis(2-chloroethoxy)methane 1.83 1.0 mglkg 333 ND 55 13-105 27 60 Bis(2-Chloroethyl)ether 1.59 1'0 mglkg 333 ND 48 10-97 32 60 8is(2-chloroisopropyl)Ether 153 1.0 mglkg 333 ND 46 10-100 33 60 3is(2-ethylhexyi)phthalate 2,91 1.0 mglkg 333 N❑ 87 20-143 1 60 Butyl benzyi phthalate 2.86 1.0 mglkg 333 N❑ 86 19-148 2 40 Chrysene 287 1 0 mglkg 333 ND 86 10-150 0.5 60 d-BHC 276 1.0 mglkg 333 ND 83 22-124 06 80 Dibenzo(a,h)a nth race ne 286 1.0 mglkg 3.33 N❑ 86 24-116 2 60 Dieldrin 269 1.0 mglkg 333 ND 81 10-200 4 60 Diethyl phthalate 2.6e 1 0 mglkg 333 ND 80 31-119 2 60 Dimethyl phthalate 2.52 1.0 mglkg 333 N❑ 76 29-113 3 60 Di-n-butylphthalate 286 1 0 mglkg 333 ND 86 10-163 3 60 Di-n-octylphthalate 305 1 0 mglkg 333 N❑ 92 10-171 2 60 Endosulfan 1 272 1 0 mglkg 3 33 N❑ 82 10-200 1 60 Endosulfan 11 277 1 0 mglkg 333 N❑ 83 18.125 5 60 Endosulfan Sulfate 268 1 0 mglkg 3 33 ND 80 10.194 8 60 Endrin 276 1.0 mglkg 3.33 ND 83 10-179 a 60 Fluoranthene 2.83 1.0 mglkg 3 33 N❑ 85 10-165 3 60 Fluorene 248 1.0 mglkg 3 33 N❑ 74 24-116 5 40 i;7rlir, h)o ltio.ri Y 95l G53 3351 CA Ft.AP No.2698 Y.0 Box 43.2 6100 Quail Vallcy C'nurl, F 951 053 1662 EPA No.CA00102 Rlve',iide,(7A 92502-10132) Riverside,CA 92507-0 01 vww.habrnrklahs.cnm NEL P No.OR 1035 LACSD No, 10119 000 BABCOCK Laboratories, Inc. lir.Slr»irl'n Farr if,11fe fin 0. ) 100 1rrr+.i Client Name: FGL Environmental, Inc. Analytical Report: Page 20 of 23 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: 5P 2017388 Santa Paula, CA 93060 Work Order Number: COL2171 Report Date: 25-Feb-2021 Received on Ice(YIN): Yes Tcmp: b 'C Semivolatile Organic Compounds by EPA 8270C-Batch Quality Control Spike Source %REC RPD Analyte(s) Result ROL Units Level Result 96REC Limits RPD Limit Flag Batch OL22075-EPA 3550B Matrix Spike Dup(OL22078-MSD1) Source:COL1959-01 Prepared:12/22/20 Analyzed:12/24/20 Heptachlor 259 1❑ mglkg 3.33 ND 78 10-131 5 60 Heptachlor Epoxide 265 10 mglkg 3.33 NO 80 21-124 3 60 Hexachlvrobenzene 252 1 0 mglkg 3.33 ND 76 20-123 4 50 Hexachlorobut<adiene 171 10 mglkg 3,33 ND 51 10-98 35 60 Hexachlorocycloperrtadiene 165 50 mglkg 3.33 ND 49 10-93 26 60 Hexachloroethane 1 37 1.0 mglkg 3.33 ND 41 10-86 34 60 Indeno(1,2,3-cd)pyrene 2 86 1.0 mglkg 3.33 ND 86 19-121 3 60 Isophorone 2 01 1.0 mglkg 3.33 ND 60 15-105 21 40 Naphthalene 1.77 1.0 mglkg 3.33 ND 53 10-104 30 60 Nitrobenzene 177 10 mglkg 3.33 IN 53 10-103 32 60 N-Nitrosodi-n-propylamine 179 1.0 mglkg 3.33 IN 54 10-105 23 40 N-Nitrosodimethylamine 165 10 mglkg 3.33 IN 49 10-87 38 60 N-Nitrosodiphenylamine 514 10 mglkg 6,67 IN 77 10-200 3 60 Pentachlorophenol 244 10 mglkg 3.33 IN 73 10-200 3 40 Phenanthrene 2.66 1❑ mglkg 3.33 IN 80 26-121 2 60 Phenol 163 10 mglkg 3.33 IN 49 11-108 31 40 Pyrene 294 10 mglkg 3.33 ND 88 10-155 0.9 40 y-BHC 2.65 1.0 mglkg 3.33 ND 80 18-121 0.6 60 Surrogate: 2.0 mglkg 2.50 78 10-122 2,4,6-Tribromophenol Surrogate:2-Fluorob+phenyl 10 mglkg 1.67 63 10-109 Surrogate.2-Fluorophenol 1.2 mglkg 2.50 48 10-96 Surrogare:4-Terphenyl-d14 1.4 mglkg 1.67 86 14-126 Surrogate:Nitrobenzene-d5 089 mglkg 167 53 10-106 Surrogate:Phenol-d6 1 3 mglkg 2.50 53 10-103 m"u1mk locarlaari P 9=31$:i3:3:3:i 1 Ca FLAP No.2698 P.0 Box 432 43100 Qua iI Valley CDurt 1'951 653 1662 EPA Na.CA00102 �+'ww.babeocklabs.com NELAP No.OR4035 Riverside,C.19'!uU2 0133 Riverside,C 9'?507 Di04 LA CST)No. 1011t} 000 BABCOCK Laboratories, Inc. '7 br,.Slandard of F,.n flow po-Of,? 100 )cr1:s Client Name: FGL Environmental, Inc. Analytical Report: Page 21 of 23 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 2017388 Santa Paula, CA 93060 Work Order Number: COL2171 Report Date: 25-Feb-2021 Received on[cc(YIN): Yes Temp: b °C Notes and Definitions N_PPC Due to its chemical properties this analyte has been identified as a poorly performing compound for this analytical method. Data acceptability is not determined by this compound's analytical performance. N_RLm Due to sample matrix,the reporting limit has been raised. NCALhNI Calibration Verification recovery was above the method control limit for this analyte. Analyte not detected, therefore data not impacted. NCALlm Callbration 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. Q_PPC Due to its chemical properties this analyte has been identified as a poorly performing compound for this analytical method. Data acceptability is not determined by this compound's analytical performance. QMdil Due to sample dilution required from high analyte concentration and/or matrix interference,the Matrix Spike recovery for this analyte is not available. 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 Reporfed RDL: Reportable Detection Limit MDL: Method Detection Limit *1{Non-NELAP): NELAP does not offer accreditation for this analyte/method/matrix combination unailing location P 961 653 3351 CA ELAP No,2698 P-0 Box 432 6100 Quail Valley Court F 951 653 1662 EPA No-CAOO102 Riverside,CA 92502.0432 Riverside,CA 92507.0704 www.babrnokIabs.com NEL.4P Na.010035 LACSD No. 10119 000 BABCOCK Laboratories, Inc. fli'r.57rlrl den d qr E%r4lrri r'r fiir Ovr.^r 100 je(?7'C Client Name: FGL Environmental, Inc. Analytical Report Page 22 of 23 Contact Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number SP 2017388 Santa Paula, CA 93060 Report Date: 25-Feb-2021 Work Order Number: COM71 Rcceived on Ice(YIN): Yes Temp; 6 T 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. Alexis Nicole Harold For Cindy A.Waddell cc: e-Standard_No Alias.rpt This report applies only 10 Me sample(s)analyzed As a mutual protection 10 clients,the public,and Babcock Laboratories,inc.this report is submitted and accepted Forme exclusive use of the Client to whom it is addressed.I nterpretalio n and use of the information contained within this report are the sole responsibility of the Client.liabcuck Laboratories,Inc.is not responsible for any misinformalion or consequences that may result Imm 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 13abc=k 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. 1 diliire; localiu++ P 951 65)3:3:351 CA ELyO No 2698 P.0 Box 432 fi100 Qii ail Valley CotLrt F 9:51 653 1662 EPA No.CA00102 R.i�eraide,CA 92.502-0432 Riverside,CA 92b07-0704 w+nw.babcocklabs.coun NEL.V No.OR4035 i.ACSD Nr), 10119 BABCOCK Laboratories, Inc. 1Ir Swnd(od ul(,u'r'11r l p'? lJrr.°+ 14() I:nr r Client Name. FGL Environmental, Inc- Analytical Report: Page 23 of 23 Contact: Cindy Aguirre Project Name. No Project Address: 853 Corporation Street Project Number: SP 2017388 Santa Paula,CA 93060 Work Order Number: COL2171 Report Date: 25-Feb-2021 Reccivcd on Ice(YIN): YCS "hemp: 6 °C CHAIN OF C USTOD Y Subcontract to 410 dn'IL h:SGS HEOE S7 FOW Babcock Laboratories, Inc. chmn of Custody(nformawn 6ample Info tion Tnst Rescrlption(s) Lxh hntnha^ I.IIPRL NilEr7v,r5 Lkcra'01" 3 dArlrrss; 8,i3 Cc,Tv:;liiv:l Si Santa P10.1,G4 9306LII3f'I1.5 x cy pp v Plwne: "v [,nn,FCF; Nmjecr• 5Y 211173M8 2 1':1rehhsa Grl61 k d 12, r _ 5' a n a3 -t�L�citor Sr:,,u fkLe: �lti Tn- = � L � s�,r.auti.i,.zq•o r *7 v p N '� y i I�.� •�{72 iC ConcriFagc CLa, C SIR 1 CL 171 ° a° Rc'd: 121171202012:26 ,( _ SNL - Sa mpq rrfri'- Iw+al38 x�':-� Con �.Inl.•r.� C,�r fmi .oe� � fry iw,...�t•, rw Prr• :!� -, -i. C.:;y 4'w- w:m;K, Cmpara;oOM—a LILu I.V (l.'!ICr s La 06,41 sry ` ••[Ini.�SI,•nr A,•y ` GlkMfL�F:•a'M, 7!rcr3ro Tr L.!':.w ci'91Y!.:L�•1:G. .r.T tN r-i: -. -hi' :rr..!.::�' •. Y r' - .n a s`Sra •'.i-.. .-yl.l:Ix�N: �-- ....... .: '(al•':I..'.�I..., .. . ..i. .. :av-e• .. I..i tl='�III�?N].kf ffl u,orilie,g Inr::7tir,r P 951(353 3351 CA ELr1!'No.2G98 P.O Box 432 6100 Quail Vaillcy Cout'L F 951 653 1662 h:PA No.CA06103 Riverside.CA 92502•[]'133 Riverside,CA 9.2507-0704 www.babcociclabs.co,n NELAP No.OR4035 LAC'SD No. 101 19 1 . SOUTH TAHOE PUBLIC UTILITY DISTRICT CHAIN OF C STQDY South Tahoe Public Utility DlstriCt Lab Sent to: Turnaround19-76 Meadow Crest Drive R�l South Lake Tahoe,CA 96154 y9 A a Sampl Standard Phone:{534)-543-6231 S � 241ir FAX: 530 541-429$ R[n� rf Q��} O a 48 Hr � ?fit ❑4l Q�} other Z o tZ � w �C�- s (o7 2 F,.% 6 ra, If-tt 07&-o W.,1 u1 3 C;, s2- Ww- 4- 13 2 uj -o c,� :rh pa., 2q hr q,c &G,�5z7qU -0q F;ml El toes t f Relinquished b o Report y: J Received by: o Report NITBE to 0.5 µglL Note any detection of MTBE t 0.2 L J � sa �Analyze Travel and Field Blanks CNy h VOCs detected In samples. Signature Signature o use Calif State Wft-On form to rrepvrt results of Potable wader w�Ils pdrn { Print � fr Company n 1= T ❑ Company dBSB R��turtts��STPU� � rithBS#.9 �e Bug�ce.; Date: 12-�1-�eJ Time Date: Time Relinquished by: Received by' Received Intact Signature Signature Received cold Print Print iCk Sag Custody seals Company Company Correct container Date: Tune Date: Time vj&Wom Chain al C wodyAoc Page of Subcontract to CHAIN OF CUSTODY AND ANALYSES REQUEST FORM Babcock Laboratories, Inc. Chain of Custody Information Sample Information Test Description(s) Lab Number: Client: Fruit Growers Laboratory 3 Address: 853 Corporation St. Santa Paula,CA 93060-3005 3 a � Phone: Fax: c Contact: n N d) a Project: SP 2017388 y t a In Purchase Order: o & z y o rz V)_ CD r-4 Sampler(s): OPS/LDS/KU a rn ° N o 0 C G m m O co Ei c b �-, ao o alcCompositor Setup Date: Time: 0 cn v f=¢ nwaW t= elDate O O O p -O O J] O tt O SamNum Location Description Sampled am pled <T PCD . a1 R1 ax En 0 � O � CD 5 WW-10 Centrifuge Cake 12/14/2020 00:00 C Slgi T- 1 1 1 I I I I I I I I I I I ! [ I I I [ I I I 1 I [ I I I I 1 ! I I I I [ ! I I I f I I I ! I l l [ I I I I 1 I I I I l l I I l [ [ I I I I I I I Remarks Relinquished Date Time Relinquished Date Time Relinquished Date Time f Received By: Dale Time I Received By: Dale Time I Received By: Date Time Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 25DO 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)392-2D63 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 FGL Environmental Doc ID:2DO900157 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 772375816238 3.Were samples received in a chilled condition? Temps: 3C 1 1 1 1 1 1 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 NIA COC? 6.Verify sample date,time, sampler Yes No NIA 7.Were the samples received intact?(i.e. no broken Yes No bottles, leaks, etc.) 8.Were sample custody seals intact? Yes No NIA 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 NIA FGL properly preserved? [Exception:Oil&Grease,VOA and CM verified in lab] 4.VOAs checked for Headspace? Yes No NIA 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 CDC for lab delivery. (Bacti. Inorganics and Radio) Sample Receipt, Login and Verification completed by: Reviewed and q.pualM cg-d h'CyN ma T Case re Cynthia T Casarez Tdhc�m�R"owing Approved By 0-it V111rN2n-092s!4 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 2017388 CTC-1211712020-09:23:55 0100 BABCOCK Laboratories, Inc. 7hr 57undnrd r,j Fyr rll 1r[r'i r 0 r 100 I i 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 numbers).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 CC753-01 AG76338-VAN-06 Raw Grab Liquid 03/02/21 17:16 OPSILDAIBC 03/04/21 10:35 FedEx CIC0753-02 AG76339-VAN-05 Final Grab Liquid 03/02/21 17:13 OPSILDAIBC 03/04/21 10:35 FedEx ClC0753-03 AG76345-VAN-10Centdfuge Sludge 03/04/2100:00 OPSILDAIBC 0310412110:35 FedEx Cake ❑)aili», loaltivri P 951 653 3351 CA ELAP No.2698 P.0 Box 432 6100 Quail Valley Court V 951 653 1662 EPA No.CA00102 Riverside,CA 92502-0432 RiverQdde,CA 92507-0704 www.babcDcklubs.com NEI.AP No.0R4035 LaCSi1 No.10119 000 BABCOCK Laboratories, Inc. 77rr.Slrrnda?'d ill It ii r'11+n i r'jnr Okrr 100 J rrr+r Client Name: South Tahoe Public Utility District Analytical Report Page 2 of 10 Contact: Dan Arce Project Name VANTP 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: CIC0753 Rcccived on Ice(YIN): Yes l rnp: 7 'C Laboratory Reference Number ClC0753-01 S_amale Description Matrix Sampled Date/]rime 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 8260B 1.1,1,2-Tetrachloroethane ND 5.0 uglL EPA 8260B 03/12/21 21:17 JES 1,1,1-Tii chi oroethane ND 5.0 uglL EPA 8260B 03/12/21 21:17 JES 1,1,2,2-TetrachIo rout hane ND 5.0 uglL EPA 8260B 03/12/21 21:17 JES 1,1,2-Tri chi oroethane ND 5.0 uglL EPA 8260B 03112/21 21:17 JES 1,1-Dichloroethane ND 5.0 ug1L EPA 8260B 03/12/21 21:17 JES 1,1-Dichloroethene ND 5.0 uglL EPA 8260B 03/12/21 21:17 JES 1,1-Dichloropropene ND 5.0 ug1L EPA 8260B 03/12/21 21:17 JES 1,2,3-Trichlorobenzene ND 5.0 ug1L EPA 8260B 03/12/21 21:17 JES 1,2,3-Trichloropropane ND 5.0 uglL EPA 8260B 03/12/21 21:17 JES 1,2,4-Tri chi orobenzene ND 5.0 ugll- EPA 8260B 03/12/21 21:17 JES 1,2,4-Trimethylbenzene ND 5.0 uglL EPA 8260E 03/12/21 21:17 JES 1,2-Dichlorobenzene ND 5.0 uglL EPA 8260E 03/12/21 21:17 JES 1,2-Dichloroethane ND 5.0 uglL EPA 8260E 03/12/21 21:17 JES 1,2-Dichloropropane ND 5.0 uglL EPA 8260E 03/12/21 21:17 JES 1,3,5-Trimethylbenzene ND 5.0 uglL EPA 8260E 03/12/21 21:17 JES 1,3-Dichlorobenzene ND 5.0 uglL EPA 8260B 03/12/21 21:17 JES 1,3-Dichloropropane ND 5.0 uglL EPA 8260B 03/12/21 21:17 JES 1,4-Dichlorobenzene ND 5.0 uglL EPA 8260B 03/12/21 21:17 JES 2,2-Dichloropropane ND 5.0 uglL EPA 8260B 03/12/21 21:17 JES 2-Butanone(MEK) ND 30 uglL EPA 8260E 03/12/21 21:17 JES 2-Chlorotoluene ND 5.0 uglL EPA 8260E 03/12/21 21:17 JES 4-Chlorotoluene ND 5.0 uglL EPA 8260B 03/12/21 21.17 JES 4-Methyl-2-Pentanone(M19K) ND 50 ug1L EPA 8260B 03/12/21 21:17 JES Acrolein ND 100 uglL EPA 8260B 03/12/21 21:17 JES Acrylonitrile ND 100 uglL EPA 8260E 03/12/21 21:17 JES Benzene ND 5.0 uglL EPA 8260E 03/12/21 21:17 JES Bromobenzene ND 5.0 ugll- EPA 8260E 03/12/21 21:17 JES Bromachloromethane ND 5.0 uglL EPA 8260B 03/12/21 21:17 JES Bromodichioromethane ND 5.0 ug1L EPA 8260B 03/12/21 21:17 JES Bromoform ND 10 uglL EPA 8260E 03/12/21 21:17 JES Bromomethane ND 5.0 uglL EPA 8260E 03/12/21 21:17 JES Carbon Tetrachloride ND 5.0 uglL EPA 8260E 03/12/21 21:17 JES Chlorobenzene ND 5.0 ugll- EPA 8260E 03/12/21 21:17 JES ;l3diEnz Iuctrf.iarz P 9,51653 3:351 CA EI 11'Na.2698 P.0 BDx 4:32 610( Quail Valley Court 1'951 653 1662 EPA No.CA00102 Riverbide,CA 92502-0432 ltiverside,CA 92507-0704 www.ha6cc)cklabs.com NFLAP No.0R,103,i LAC SD No.10119 0100 BABCOCK Laboratories, Inc. '1?r'r.Slrnrdooial (r,r,+rur' 'r,i(]rr•r 700 Irru Client Name: South Tahoe Public Utility District Analytical Report: Page 3 of 10 Contact: Dan Arce Project Name: VdWTP 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 Rcceived on Icc(YIN); Yes 'I emp: 7 °C Laboratory Reference Number C1 C0753-01 Sample Description Matrix Sampled Dater ime 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 8260B Chloroethane ND 5.0 uglL EPA 8260B 03/12/21 21:17 JES Chloroform N❑ 5.0 uglL EPA 8260B 03/12/21 21:17 JES Chloromethane NO 5.0 uglL EPA 82606 03/12/21 21:17 JES cis-1,2-Dichloroethene NO 5.0 uglL EPA 82606 03/12/21 21:17 JES cis-1,3-Dichloropropene NO 5.0 uglL EPA 82606 03/12/21 21:17 JES ❑ibromochloromethane NO 5.0 uglL EPA 8260E 03/12/21 21:17 JES Dibromomethane NO 5.0 uglL EPA 8260E 03/12/21 21:17 JES Dichlorodifluoromethane NO 5.0 uglL EPA 8260E 03/12/21 21:17 JES Ethylbenzene NO 5.0 ug1L EPA 82608 03/1212l 21:17 JES Hexachlorobutadiene NO 5.0 ug1L EPA 8260E 03/12/21 21:17 JES lsopropylbenzene NO 5.0 ug1L EPA 8260E 03I12121 21:17 JES Methyl tert Butyl Ether NO 50 uglL EPA 8260B 03/12/21 21A7 JES Methyiene Chloride N❑ 30 uglL EPA 8260B 03/12/21 21:17 JES Naphthalene ND 5.0 uglL EPA 8260B 03/12/21 21:17 JES n-Butylbenzene ND 5,0 uglL EPA 8260B 03/12/21 21:17 JES n-Propylbenzene ND 5.0 uglL EPA 8260B 03/12/21 21:17 JES sec-Butylbenzene ND 5.0 uglL EPA 8260E 03/12/21 21:17 JES Styrene NO 5.0 uglL EPA 8260E 03/12/21 21:17 JES teat-Butylbenzene NO 5.0 uglL EPA 8260E 03/12/21 21:17 JES Tetrachloraethene ND 5.0 uglL EPA 8260E 03/12/21 21:17 JES Toluene ND 5.0 uglL EPA 8260B 03/12/21 21:17 JES trans-1,2-❑ichloroethene ND 5.0 uglL EPA 8260E 03/12/21 21:17 JES trans-1,3-Dichloropropene ND 5.0 uglL EPA 8260B 03/12/21 21:17 JES Trichloroethene ND 5.0 uglL EPA 8260E 03/12/21 21:17 JES Trichlorofluoromethane ND 50 uglL EPA 8260B 03/12/21 21:17 JES Vinyl Chloride ND 5.0 ug1L EPA 8260B 03/12/21 21:17 JES Xyienes(m+p) ND 5.0 ug1L EPA 8260B 03/12/21 21:17 JES Xylenes(ortho) ND 5.0 uglL EPA 8200B 03112/21 21:17 JES Surrogate:1,2-Dichloroethane-d4 102% 80-120 EPA 8260B 03/12/21 21:17 JES Surrogate:4-8romofluorobenzene 9911. 80-120 EPA 8280B 03/12/21 21:17 JES Surrogate:Toluene-de 98% 80-120 EPA 8260B 03/12/21 21:17 JES Surrogate:1,2-Dichloro6enzene-d4 103% 0-200 EPA 8280B 03/12/21 21:17 JES ur:ailin- Irxrztaun P 951 6533351 CA EL-AP Na.2698 P.0 Box 432 6100 Qua iI Valley Court F 951 653 1663 EPA No.CAOO102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.hahcocklahs.com NELAP No.OR 1035 L lCS1l No, 10119 000 BABCOCK Laboratories, Inc. 1+ie' S7rrrlrl:rrrt rrl-j'ir, On r 100 1 rurx Client Name: South Tahoe Public Utility District Analytical Report: Page 4 of 10 Contact: Dan Arce Project Name: VWUTP 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 Iteceived on Ice(YN): Yes Temp: 7 "C Laboratory Reference Number Cl C0753-02 Sample Description Matrix Sampled Da#effime_ Received Date/Time AG76339-VVW-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 8260B 1,1,1,2-Tetrachloroethane N❑ 0.50 uglL EPA 8260B 03/12/21 15:11 JES 1,1,1-Trichloroethane N❑ 0.50 uglL EPA 8260B 03/12/21 15:11 JES 1,1,2,2-Tetrachloroethane N❑ 0.50 uglL EPA 8260B 03/12/21 15:11 JES 1,1,2-Trichloroet Ina ne N❑ 0.50 uglL EPA 8260B 03/12/21 15:11 JES 1,1-Dichloroethane N❑ 0.50 uglL EPA 8260B 03/12/21 15:11 JES 1,1-Dichloroethene N❑ 0.50 uglL EPA 8260B 03/12/21 15:11 JES 1,1-Dichloropropene N❑ 0.50 uglL EPA 8260B 03/12/21 15:11 JES 1,2,3-Trichlorobenzene N❑ 0.50 uglL EPA 8260B 03/12/21 15:11 JES 1,2,3-Trichloropropene ND 0.50 uglL EPA 8260E 03/12/21 15:11 JES 1,2,4-Trichlorobenzene ND 0.50 uglL EPA 8260E 03/12/21 15:11 JES 1,2,4-Trimethylbenzene ND 0.50 uglL EPA 8260E 03/12/21 15:11 JES 1,2-Dichlorobenzene ND 0.50 uglL EPA 8260B 03/12/21 15:11 JES 1,2-Dichloroethane ND 0.50 uglL EPA 8280E 03/12/21 15:11 JES 1,2-❑ichioropropane ND 0.50 uglL EPA 8260B 03/12121 15:11 JES 1,3,5-Trimethylbenzene ND 0.50 uglL EPA 8260B 03112/21 15:11 JES 1,3-Dichlorobenzene ND 0,50 uglL EPA 8260B 03/12/21 15:11 JES 1,3-Dichloropropane N❑ 0.50 uglL EPA 8250B 03/12/21 15:11 JES 1,4-Dichlorobenzene N❑ 0.50 uglL EPA 8260E 03/12/21 15:11 JES 2,2-Dichloropropane ND 0.50 uglL EPA 8260E 03/12/21 15:11 JES 2-Butanone(MEK) ND 3.0 uglL EPA 8260E 03/12/21 15:11 JES 2-Chlorotoluene ND 0,50 uglL EPA 8260B 03/12/21 15:11 JES 4-Chlorotoluene N❑ 0.50 uglL EPA 8260B 03/12/21 15:11 JES 4-Methyl-2-Pentanone{MIRK} ND 5.0 uglL EPA 8260E 03/12/21 15:11 JES Acrolein ND 10 uglL EPA 8260E 03/12/21 15:11 JES Acrylonitrile N❑ 10 uglL EPA 8260E 03/12/21 15:11 JES Benzene ND 0.50 uglL EPA 8250B 03/12/21 15:11 JES Bromobenzene N❑ 0.50 uglL EPA 8260B 03/12/21 15:11 JES Bromochloromethane N❑ 0.50 uglL EPA 8260E 03/12/21 15:11 JES Bromodichloromethane ND ❑50 uglL EPA 8260B 03/12/21 15:11 JES Bromoform ND 1.0 uglL EPA 8250B 03/12/21 15:11 JES Bromomethane N❑ 0.50 uglL EPA 8260B 03/12/21 15:11 JES Carbon Tetrachloride N❑ 0.50 uglL EPA 8260E 03/12/21 15:11 JES Chlorobenzene N❑ 0.50 uglL EPA 8260E 03/12/21 15:11 JES 111.13irr" lrx,rkion P 951 653 3351 CA ELAP No.2698 P,O Box 132 6100 Quail Va11cy C'OLirt F 951653 1662 EPA No.CA00102 Riverside,CA 92.502.0.1:32 River.,ade,CA 92507-0704 www.babcaeklab xom NLLAP No.01"035 LACSD No. 10119 000 BABCCCK Laboratories, Inc. I/Jr.S11!14(1i0?d fil h,'1L[:i[,:ehi +ill Of"ee 170 3rU„ 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: 16-Mar-2021 Work Order Number: C1C0753 Received on Ice(YIN): Yes Temp: 7 °C Laboratory Reference Number C1 C0753-02 Sample Description Matrix Sampled❑atelTime Received Date/Time AG76339-VWU-05 Final Grab Liquid 03/02/21 17A3 03/04/21 10:35 Analyte(s) Result RDL Units Method Analysis Date Analyst Flag Volatile Organic Compounds by EPA 8260B Chloroethane N❑ 0.50 uglL EPA 8260B 03/12/21 15:11 JES Chloroform 0.86 0.50 uglL EPA 62608 03112/21 15:11 JES Chloromethane N❑ 0.50 uglL EPA 8260E 03/12/21 15:11 JES cis-1,2-Dichloroethene N❑ 0.50 uglL EPA 8260E 03/12/21 15:11 JES cis-1,3-Dichloropropene N❑ 0-50 uglL EPA 8260E 03/12/21 15:11 JES ❑ibromochloromethane N❑ 0.50 uglL EPA 8260E 03/12/21 15:11 JES ❑ibromomethane ND 0.50 uglL EPA 8260E 03/12/21 15:11 JES Dichlorodifluoromethane N❑ 0.50 uglL EPA 8260E 03/12/21 15:11 JES Ethyibenzene NO 0.50 uglL EPA 8260B 03/12/21 15:11 JES Hexachlorobutadiene NO 0.50 uglL EPA 8260B 03/12/21 15:11 JES lsopropylbenzene NO 0.50 uglL EPA 8260B 03/12/21 1 5-1 1 JES Methyl tert Butyl Ether NO 5.0 uglL EPA 8260B 03/12/21 1 5-1 1 JES Methylene Chloride ND 3.0 ug1L EPA 8260B 03/12/21 15:11 JES Naphthalene ND 0.50 ug1L EPA 82606 03/12/21 15:11 JES n-Butylbenzene ND 0.50 ug1L EPA 82606 03/12/21 15:11 JES n-Propylbenzene ND 0.50 uglL EPA 8260B 03/12/21 15:11 JES sec-Butylbenzene ND 0.50 uglL EPA 8260E 03/12/21 15:11 JES Styrene ND 0.50 uglL EPA 8260E 03/12/21 15:11 JES tert-Butylbenzene NO 0.50 uglL EPA 5260B 03/12/21 15:11 JES Tetrachloroethene ND 0.50 uglL EPA 8260B 03/12/21 15:11 JES Toluene ND 0.50 uglL EPA 8260B 03/12/21 15:11 JES trans-1,2-❑ichloroethene ND 0.50 uglL EPA 8260E 03/12/21 15:11 JES trans-1,3-Dichlorapropene NO 0.50 uglL EPA 5260B 03/12/21 15:11 JES Trichloroethene ND 0.50 uglL EPA 6260B 03/12/21 15:11 JES Trichlorofluoromethane ND 5.0 ug1L EPA 8260B 03/12/21 15:11 JES Vinyl Chloride NO 0-50 uglL EPA 82608 03/12/21 15:11 JE5 Xylenes(m+p) ND 0.50 uglL EPA 8260B 03/12/21 15:11 JES Xylenes(ortho) ND 0.50 uglL EPA 8260B 03/12/21 15:11 JES Surrogate:1,2-Dichloroe[hane-d4 104% 80-120 EPA 8260B 03/12/21 15:11 JES Surrogate:4-Bromoflucrobenzene 103% 80-120 EPA 8260B 03/12/21 15:11 JES Surrogate Toluene-dB 98% 80-120 EPA 8260B 03/12/21 15:11 JES Surrogate:9,2-Dichlorobenzene-d4 104% 0-200 EPA 8260B 03/12/21 15-11 JES ❑Aoailing tor:tine P 9.51 653 3351 CA EL 1F No.2698 P.0 Box 432 6100 Qnail Valley C'.uuet F 951 653 1662 FPA No.C 0010.2 Riverside,CA 92502-0432 Riverside,CA 92307-0704 www.babcockIabz-coui NELyW No.OH403o i,AC..S➢No. 10l 19 000 BABCOCK Laboratories, Inc. 1, Cirrr ::;1 ,1 1:'u;:li+:,;• +,; f);rr 100 )6111 s 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 lee(YIN): Yes Temp: 7 Laboratory Reference Number C1 C0753-03 Sample Description Matrix Sampled DatelTime Received DatelTime AG76345-WW-10 Centrifuge Cake Sludqe 03/04/21 00:00 03/04/21 10:35 Analyte(s) Result RDL Units Method Analysis hate Analyst Flag Solids Total Solids 23 0.10 % SM 2540G 03/08/21 16:59 ❑FL Volatile Organic Compounds by EPA 8260B 1.1.1,2-Tetrachloroethane N❑ 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC 1,1,1-Trichloroethane N❑ 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC 1,1,2,2-Tetrachloroethane N❑ 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC 1,1,2-Trichloroethane N❑ 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC 1,1-Dichloroethane N❑ 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC NLOhN❑ 1,1-Dichloroethene N❑ 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC 1,1-❑ichloropropene N❑ 440 uglkg dry EPA 8260E 03/08/21 22:02 EEC 1,2,3-Trichlorobenzene N❑ 440 uglkg dry EPA 8260E 03/08/21 22:02 EEC 1,2,3-Trichloropropane ND 880 uglkg dry EPA 8260E 03/08/21 22:02 EEC 1,2,4-Trichlorobenzene ND 440 uglkg dry EPA 8260E 03/08/21 22:02 EEC 1,2,4-Trimethylbenzene ND 440 uglkg dry EPA 8260E 03/08/21 22:02 EEC 1,2-Dichlorobenzene ND 440 uglkg dry EPA 8260B 03108/21 22:02 EEC 1,2-Dichloroethane ND 440 uglkg dry EPA 8260E 03108/21 22-02 EEC 1,2-Dichloropropane N❑ 440 uglkg dry EPA 8260E 03/08/21 22:02 EEC 1,3,5-Trimethylbenzene N❑ 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC 1,3-Dichlorobenzene ND 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC 1,3-Dichloropropane ND 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC 1,4-Dichlorobenzene ND 440 uglkg dry EPA 8260B 03108/21 22-02 EEC 2,2-Dichloropropane N❑ 660 uglkg dry EPA B260B 03/08/21 22:02 EEC 2-Butanone(MEK) 160000 880 uglkg dry EPA 8260B 03/13/21 01:05 JES 2-ChiorotDluene ND 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC 4-Chiorotoluene ND 440 uglkg dry EPA B260B 03108/21 22:02 EEC 4-Methyl-2-Pentanone(MMK) N❑ 4400 uglkg dry EPA B260B 03108/21 22:02 EEC Acetone 210000 1800 uglkg dry EPA 8260E 03/13/21 01:05 JES Acrylonitrile ND 8800 uglkg dry EPA 82606 03/08/21 22:02 EEC Benzene ND 440 uglkg dry EPA 82606 03/08/21 22:02 EEC Bromobenzene N❑ 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC Bromochloromethane ND 440 uglkg dry EPA 8260E 03/08/21 22:02 EEC Bromodichloromethane ND 440 uglkg dry EPA 82606 03/08/21 22:02 EEC Bromoform ND 440 uglkg dry EPA 82606 03/08/21 22:02 EEC NRPDb Bromomethane N❑ 2200 uglkg dry EPA 82609 03/08/21 22:02 EEC P 951 653:3351 (A EL,+LP No.2698 P.O Box 132 6100 Quail Valtuy Court F 951 6-53 1669 PP.A No,Co-1Do102 Hive,• idc,CA 03503-0432 KivCr9i[te,CA 9250 7-070 1 %yww.babcochIabs.coin NELAP No.QR4035 T,ACSD No. 1o119 00 @0 0 BABCOCK Laboratories, Inc. The Sian dal nf fi,1-Ot'o 100 1rflrr Client Name: South Tahoe Public Utility district Analytical Report: Page 7 of 10 Contact: Dan Arce Project Name: VWVTP 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. CIC0753 Received oii Ice(YIN): Yes Temp: 7 °C Laboratory Reference Number C1 C0753-03 Sample Description Matrix Sampled Date/Time Received Date/Time AG76345-WW-10 Centrifuge Cake Sludge 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 8260B Carbon Tetrachloride N❑ 440 uglkg dry EPA 8260E 03/08/21 22:02 EEC Chlorobenzene N❑ 440 uglkg dry EPA 8260B 03108/21 22:02 EEC Chloroethane N❑ 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC Chloroform N❑ 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC CNoromethane N❑ 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC cis-1,2-Di chi oroethene N❑ 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC cis-1,3-Dichioropropene N❑ 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC Dibromochioromethane N❑ 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC Dibromochloropropane N❑ 4400 uglkg dry EPA 8260B 03/08/21 22:02 EEC Dibromomethane N❑ 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC Dichlorodiflueromethane ND 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC Ethylbenzene ND 440 uglkg dry EPA 8260E 03/08/21 22:02 EEC Hexachlorobutadiene ND 1300 uglkg dry EPA 8260E 03/08/21 22:02 EEC Methyl tert Butyl Ether N❑ 4400 uglkg dry EPA 8260E 03/08/21 22:02 EEC Methylene Chloride N❑ 2600 uglkg dry EPA 8260B 03/08/21 22,02 EEC n-Butylbenzene N❑ 440 uglkg dry EPA 8260E 03/08/21 22:02 EEC n-Propylbenzene N❑ 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC Naphthalene N❑ 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC sec-Butyl benzene N❑ 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC Styrene N❑ 440 uglkg dry EPA B260B 03/08/21 22:02 EEC tert-Butylbenzene N❑ 440 uglkg dry EPA 8260E 03/08/21 22:02 EEC Tetrachloroethene N❑ 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC Toluene 980 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC trans-1,2-Dichloroethene N❑ 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC trans-1,3-Dichloropropene N❑ 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC Trichloreethene N❑ 440 uglkg dry EPA 8260E 03/08/21 22:02 EEC Trichlorofluoromethane N❑ 4400 uglkg dry EPA 8260E 03/08/21 22:02 EEC Vinyl Chloride N❑ 440 uglkg dry EPA 8260B 03/08/21 22:02 EEC Xylenes(m+p) N❑ 880 uglkg dry EPA 8260B 03/08/21 22:02 EEC Xylenes(ortho) N❑ 440 uglkg dry EPA 8260B 03/08/21 22,02 EEC xylenes(total) N❑ 880 uglkg dry EPA 8260E 03/08/21 22:02 EEC Surrogate:1,2-Dichloroethane-d4 96% 74-125 EPA 8260B 03/13121 01:05 JES Surrogate:1,2-Dichloroethane-d4 99% 74-126 EPA 8260E 03/08/21 22:02 EEC IlMiLing locxlicm P 951(353 3351 CA ELAP No.2698 P.0 Bnx 432 610( Quail Valley,Court P 9ti1(35 3 166? EPA No-CA00102 Riverside,CA 92502-0132 Hiverside.CA 92507-0704 Ww'w.baibwcklab&cuiu NELtP No,0H4035 LAC.SD No- 10119 0@00 BABCCCK Laboratories, Inc. 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: ClC0753 Rcccivcd on lcc[YIN]: Yes 'Temp: 7 °C Laboratory Reference Number CI C0753-03 Sample Description Matrix Sampled Daterrime 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 8260B Surrogate:4-Bromofluorobenzene e6% 76-127 EPA 8260E 03/13/21 01:05 JES Surrogate:4-Bromofluorobenzene 87% 76-127 EPA 8260B 03/08/21 22:02 EEC Surrogate:Toluene-dB 96% 80-120 EPA B260B 03/08/21 22:02 EEC Surrogate:Toluene-dB 100% 80-120 EPA 8260E 03/13/21 01:05 JES Surrogate:1,2-Dichlorcbenzene-d4 108% 0-200 EPA B260B 03/13/21 01:05 JES Surrogate:f,2-Dichlorobenzene-d4 128% 0-200 EPA B260B 03/08/21 22:02 EEC 11rail"nK lucation P 7a1 653:33551 CA FLAP No.'2698 RD Box 432 6100 Quail Valley Court 1'9516.53 1662 EPA No.CA0010'2 Riverside,CA 92502-0432 Riverside,CA 92607-0704 www.bahencklahs.uoni NFLAP Nn.OR4035 LAC'SD No. 10119 000 BABCOCK Laboratories, Inc. IN 9(indard of!')r'c1lFrlcri+r Qr:r 100 fir.t s Client Name South Tahoe Public Utility District Analytical Report: Page 9 of 10 Contact Dan Arce Project Name: VW TP 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(YIN}: Yes Temp: 7 °C Notes and Definitions NLOhN❑ LCS recovery was above method control limit for this analyte. Analyte not detected,therefore data not impacted. NRPDb This analyte's R P D value for the LCSILCS❑did not meet laboratory acceptance criteria.The data was accepted based on valid RPD of the remaining analyte(s). ND: Ana lyte 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 1 NELAP does not offer accreditation for this analytelmethodlmatrix 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_N❑Alias.rpt This report applies only to the Mrple(s)an atyzed..As a mutual protection to clients,the public and Babcoc:<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 cantainedwithin this report are the sole responsihitity 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 malterwithout written authorization from Babcock laboratories,Inc.The riahilily of Bahcnck Laboratories,Inc.is limited to the actual cost of the requested analyses,unless otherwise agrees upnn in vriIJng There is no otherwarranty expressed or implied rrraeibir,, 106:a fiorl P 9,51653 3351 CA ELAP No.2698 P.O Box 132 6100 Quail Valley Court F 951 653 1662 F.PA No,C ADO 102 Riverside,CA 92502-0433 Riverside,CA 92507-0704 wrww.babcocklabr.wixi NELAP No.OR4035 LACSD No. 10 L 151 000 BABCOCK Laboratories, Inc. 7 ` hi! Slrilirl+il-f7r'1;F- r r rii 1[r+ jr!i Q-i.i 100 ),a'' Client Name: South Tahoe Public Utility District Analytical Report Page 10 of 10 Contact: Dan Arce Project Name: VVWfP 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(YIN): Yes Tenip: 7 °C SOUTH TAHOE PUBLIC UTILITY DISTRICT CHAIN OF CUSTODY .Sould Tahoe Puhll:Uthl-ty❑Wk.-t oi.t'LaKe shoe.GA 9c ` 7 at seai; i le4 Pala �$3 Tahoe.GA 9E1 ° SardPr , Phan :;530i•543fi23i FAX- 530-541-4296 O<<3 LO19 .24Hr �i... .11 it P� EPA Pr kZR-t SR t�Aty Cale YIPP prask,vr: Mwre-: +L P.eHadis: M6335 WW-00 Rau Grab 03 z2l Hol wi 3 AUWb3N 05 Ti Grab i)-3 CI v/1 1 3 95 NN5 W -I0 ent ifl, Cake 9hr 400 CIC0753 a a 41 el Rc'd: 0310412021 10:35 0 5NL � � I camr:mte' y' Report 1lTBE l0 9.511q'L No;e�+r oela-tion N'JTBE a C 2;3'_ �,,.J -: .vlaJy:e 1 ravel and FIel7 Biar*s x9y.1 vOCs 1--ePmw rr Sar"okls. Cgm 1�,t f� it�Ti[:.'Z_— P _ Use Call Slair InI C Oro to r:;o re:+7:!reSUR a Fc raW Vlater NY I!s Prir•I _�tir �^IY)Fy _ P*i C,. PMY 5CHrMf}I P 5W' - C�npnry % __- Please return all STPUD ice chests&Blue Ice. -:le Y-gL2! r11•,e J03r_ #i�Gaiai:. Ya:i 3 "°•";; rI rsitE hear;,stied the y leceiJed try Received mta^ 1 yldJltl. Cfj�� =r'I'@ �7yy� liwxe•mdca!d Y I':7H ---FCp�L� 'n!'[ K-1^}F�1►r'W 4 (d R ^� Cu slod sews Cor.W.y�((G,�! - ,:u•�ipa-v... E93 Currer.'1r.C�alner fJale: 314F2t r:me._ _• Jae ,�hY12J — Time '[;u"xvu,e,c'c.w.drn: Pao J rll � f�+,[ilifi; lucnriury P 951 6-53 3331 CA ELAP-No.2698 P.❑Box 132 6100 Quail V,illey Court F 951 653 1663 EPA No.Ca001.02 6vcrside,CA 92502-0132 11ivoraide.CA 92 07-0004 rvww.hrahcocklahs-com NELAP No.OR10:35 L�ACSD No. t0119 i HEAVENLY VALLEY CREEK EMERGENCY RETENTION BASIN And HEAVENLY VALLEY CREEK MONITORING Monthly monitoring of Heavenly Valley Creek and the monitoring wells were performed throughout 2020. 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 2020 and the yearly averages since monitoring was initiated. Monitoring wells for buried sludge was initiated in 1992. The monthly results for 2020 are reported. IA' HVC-3 ,• ;l�VC-5 f-" HVC-4�►' + ��, �• HVC-? 1 } �' t •� �x C ►LAB ' ' us r kkk Ak -. •r" I + HVC-1. kt � 1Yf6ado:h.Gc4�� •� � . . � ' � t Image k�::2074 OtgitalGlode r (,J �- I I '�9�aain•Qr D 2010 Googte imagery Date.Nov 1.2007 lat 38.919987' [on-119-965368' elev 6331 1t Eyi ail 8E53 it Site: HVC-1 SOUTH TAHOE PUBLIC UTILITY DISTRICT 3/16/2021 WATER QUALITY DATA Below Pioneer Trail HEAVENLY VALLLEY CREEK Temp EC Chloride CO❑ TKN NO3-N Dale C pH umhos mg1L Mq& mg1L mg1L Nate 01/23/2020 1.9 6.90 67,2 0,796 c 0,100 0.046 0 212 612 0 2D 3.0 7,07 61.8 0.895 a 0.100 0.089 03/12/2020 16 6.85 48.0 0.827 0.050 0,046 04/13/2020 3.8 7.37 47.7 0.956 < 0.10 0.046 0512212020 5.6 6.89 37.9 0.940 a 0.10 a 0.010 06/11/2020 12.3 6.88 37.4 0.737 0.49 a 0.010 D712412020 14.4 7,90 54.1 0.682 0.23 0,019 0B128/2020 14.0 7.36 63,6 M78 0.28 0.059 09/24/2020 No Flow 10/22/2020 No Flow 11/24/2020 1,6 7,30 81,0 1.390 a 0.10 0.120 12/22/2020 1.1 7.19 94.7 1.250 a 0.10 0.175 Maximum 14.4 7.90 941 1,390 0.49 0.175 Minimum 1.1 &85 37.4 0.682 0.050 c 0.010 Average 6.1 7.17 58.3 0.90 0.165 0.062 #Tests 10 10 10 10 0 10 10 Temp pH EC Chloride COD TKN NO3-N Year C umhos m L m 1L m IL m 1L Comments 1984 4.0 7.30 43.0 0.90 5,0 0,110 1986 3.7 7.39 50.0 1.30 6,0 0.180 1986 4A 7.18 42.0 1.00 8.0 0.130 1987 4.7 6,70 77.0 5.50 5,0 0,200 19BB 1.9 6-99 80.0 5.10 5.0 0,330 1989 4.6 7.14 59.0 1,50 6.0 0A 50 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 2.10 106 0.600 0.098 1995 5A 6.80 55,8 1.85 10.6 0.335 0.065 1996 5,6 7.30 49.0 1.10 6.0 0.234 0,050 1997 6A 7.25 42.0 0,90 6,0 0.294 0.070 1998 4.9 6.90 44.0 1 M 10 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 55A 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 1L60 6.13 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 2006 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 6.7 DA79 0.038 2012 6.1 727 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 6A 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 Maximum 7.3 7.54 84,9 5,50 14.6 0.600 0.330 Minimum 1,9 610 42,0 0.80 5,0 01066 0.022 Average 5.4 7,18 57,6 1.67 78 0.195 0.098 #Years 37 37 37 37 28 28 37 Site: HVC-2 SOUTH TAHOE PUBLIC UTILITY DISTRICT 3/16l2021 WATER QUALITY DATA Upstream 5TPUID HEAVENLY VALLLEY CREEK Temp EC Chloride COD TKN NO3-N Dale C pH umhos m IL m 1L m IL m 1L Note 01/23/2020 1.4 6.08 58.4 1.22 0 217 < 0 010 02/26/2020 4.2 6.35 58.4 1.78 0.186 < 0.010 03/12/2020 5.0 6.76 50.0 2.07 0.156 c 0.010 04/13/2020 6.9 6.74 43.9 1.68 0.10 0.028 05l2212020 6.0 6.55 75.4 0.952 0.24 < 0.010 06/11/2020 16.5 6.74 41.8 0.733 0.58 < 0.010 07/24/2020 22.2 6.42 52.4 0.627 1.6 a 0 010 0 812 812 0 2 0 No Flow 09/24/2020 No Flow 10/22/2020 No Flow 11/24/2020 No Flow 12222/2020 No Flow Maximum 22.2 6.76 75.4 2.07 0.0 1.6 0.028 Minimum 1.4 6.08 41.8 0.627 0.0 ¢ 0,10 a 0.010 Average 8.9 6.52 54.3 1.29 0 440 0.013 #Tests 7 7 7 7 0 7 7 Temp pH EC Chloride COD TKN NO3-N Year C umhos mg1L mg1L mg1L mg1L 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 0220 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 7A 0255 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 2905 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 0.1 BO 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 6.74 492 1.13 15.2 0.143 0.01 B 2012 5.9 6.72 517 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 B.7 6.65 422 1.36 0.404 0.197 2016 7.3 626 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 54.3 129 OA40 0.013 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 1143 0.010 Average 6.0 6.81 51.1 2.06 13.0 0.292 0.059 #Years 36 36 36 36 27 27 36 Site: HVC-3 SOUTH TAHOE PUBLIC UTILITY DISTRICT 3/16/2021 WATER QUALITY DATA Below Meadow Crest Dr HEAVENLY VALLLEY CREEK Temp EC Chloride Coo TKN NO3-N Date C pH umhos mg/L mg1L mglL mglL Note 01/23/2020 No Row 02/26/2020 0.70 6.66 66.8 2.14 0.197 0.010 03112l2020 3.8 6.98 56.0 2.38 0.167 0.011 04/13/2020 6.1 6.87 51.7 2.16 a 0.10 0.038 05/22/2020 6.1 6.63 38.5 1.01 0.14 <0.010 061l1/2020 16.4 6.72 39.0 0.711 0.51 a 0.010 07/24/2020 No Flow 08/28/2020 No Flow 09/2412020 No Flow 10l22✓2020 No Flow 11/2412020 No Flow 12/22/2020 No Flow Maximum 16.4 6.98 66.8 2.38 0.0 0.51 0.038 Minimum 0.70 6.63 38.5 0.711 0.0 <0.10 0.010 Average 6.6 6.77 50.4 1.68 0.223 0.016 #Tests 5 5 5 5 0 5 5 Temp pH EC Chloride COD TKN NO3-N Year C umhos mg/L mglL mg/L mglL Comments 1984 4.6 7.05 50.0 1.90 7.0 0.100 1985 3.4 7.16 84.0 3.60 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 1611 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 1996 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 0.036 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 0262 2004 6.2 6.79 42.3 1.68 B.5 0.219 0.05E 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 01307 0.09E 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 0.01 B 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 0.196 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 1016 Maximum B.1 7.27 289.0 22.50 48.6 3240 1.220 Minimum 0.9 6.40 42.3 1.20 4.0 0.133 1011 Average 5.6 6.89 79.3 4.63 16.1 0.432 0.143 #Years 37 37 37 37 28 28 37 Site: HVC S SOUTH TA HOE PUBLIC UTILITY DISTRICT 311612021 WATER QUALITY DATA Culvert Avove Meadow Crest Dr HEAVENLY VALLLEY CREEK Temp EC Chloride COD TKN NO3-N Date C pH umhos m 1L 1L TAIL mqilL Nose OV2.312020 No Flaw 0112 612 0 2 0 No Flaw 0212612020 No Flaw 0 311 212 02 0 No Flow 0411 M020 No Flow 05f2212020 No Flow 0 611 112 0 2 0 No Flow C W12412020 No Flow OW312020 No Flow M2412020 No Flow 1 012 212 0 2 0 No Flow 11124=20 No Flow 1 212 212 02 0 No Flow Maximum O O 000 00 00 0 000 0 000 Mlnimum 00 000 00 000 0 00O 0 000 Average #Tests 0 6 a 0 0 0 0 Temp pH EC Chloride COD TKN NO3-N Year C umhos m L m IL m IL mWL Comments 1904 1985 1986 1987 1986 1909 1990 1991 1992 1903 1994 80 753 BOO 370 180 0 910 0 240 1995 42 883 360 2 00 410 1 000 0 130 1996 53 728 890 8-00 310 0 963 0 350 1997 43 649 2680 350 290 0 840 0 070 1998 0 7 650 1330 5 20 270 0 910 1 780 1999 80 6 97 674 12 69 257 1 190 0 123 2000 4.4 667 31 1 15 35 212 0 639 0 236 2001 Dry 2002 49 674 301 1 10 92.9 1 460 0 352 2003 1 1 729 37 0 669 240 0 5B3 0 222 2004 Dry 2005 37 673 74 3 400 650 1 016 0 8159 2006 51 723 112 0 349 457 0 568 0 455 2007 2 1 662 459 327 935 0 875 0 218 2008 Dry 2009 59 701 360 276 316 0 447 0 210 2010 62 718 1743 3392 97 3 0 a45 0 539 2011 63 6 64 667 372 20B 0 0 900 0 441 2012 39 659 36 a 317 0 509 0180 2013 15 7 589 507 434 1 880 0 401 2014 44 673 502 723 0319 0116 2015 95 608 338 8 46 1 201 0 069 2016 50 669 1017 2208 0311 0101 2017 159 543 507 641 0 823 0 187 201 B 61 710 933 149 0 969 0 225 2019 47 639 124 699 ❑428 2020 Dry Maximum 157 753 26a 0 33.92 208.0 16130 1.780 Minimum 0.7 5 B9 301 1 10 180 0 311 0 059 Average 5.5 6 77 7B 4 515 563 0 B55 0 333 4 Years 23 23 23 23 15 23 22 Nitrate-Nitrogen 140 120 • 1.00 I J E 080 3 A 060 a O z 040 • • r A 020 + i t + ` ■ a y 0.00 _ � mmdrm m � 88880 --�---HVC-1 i HVC-2 ■ HVC-3 Chloride 25 ■ 20 w J 15 E ■ ■ ■ 10 V 5 = + ■ a # `+ ■ A a x r ■ A IF i 0 R R m m T T R F. R R R R R R R A t HVC-1 r HVC-2 ■ HVC-3 Electrical Conductivity 350 300 250 , E cv 200 H E 150 • t 100 50 R m m 6 m 8 R g 2 a n r g ro N N V - V T � n - S f HVC-2 ■ HVC-3 EMERGENCY RETENTION BASIN, TREATMENT PLANT & BURIED SLUDGE MONITORING WELLS Gl ra':V]7 v Hank=MonkrAyp { • . ' °r }'w 10 s h S y r f 41aors y,ti o �- '��k,BartsG,r. -_z f r .� '•'ar,k�B:r•;•n'�et � .. �,_W+� - •sty;, _ �Yy�:,�1 .-•^[��= a • ,� + �� ,*�' 1 � -' .�. �f"i............. 'lcv 2 Ci 1p!- -��3.. -�11�Cr" I. I., }1 .�a4�,'4s'r-. a I ., 6 SOUTH TAHOE PUBLIC UTILITY DISTRICT 311W021 Site: CONTROL WATER QUALITY DATA Area: Emergency Pond MONITORING WELLS Mean Sea Temp EC Chloride CO❑ NO3-N Date Level C _ pH umhos mg1L mg1L mglL Comments 01/08/20 6282.60 8.0 7.48 259 19.9 4.56 04/27/20 6282.02 9.4 6.95 255 20.5 4.51 07/09/20 6281.68 10.6 6.88 250 20.6 4.35 10/08/20 6280.99 9.3 6.95 247 22.7 4.76 Maximum 62B2.60 10.6 7.48 259 22.7 4.76 Minimum 6280.99 8.0 6.88 247 19.9 4.35 Average 6251.82 9.3 7.07 253 20.9 4.55 #Tests 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride CO❑ NO3-N Year Level C pH umhos m 1L m IL mg1L Comments 1984 1985 1986 1987 6281.4 9.1 6.87 137 3.6 6 0.64 1958 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 8.8 6 2.43 2000 6282.8 9.4 6.83 174 7.4 a 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 10A 8 3.45 2007 6281.8 9.8 6.82 192 10.5 6 3.40 2005 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 6.51 227 19.1 4.62 2020 6281.8 9.3 7.07 253 20.9 4.55 Maximum 6285.5 11.0 7.44 254 20.9 8 5.03 Minimum 6272.2 9.0 6.66 115 0.6 3 0.10 Average 6279.6 9.7 6.98 185 9.2 6 2.88 #Years 34 34 34 34 34 25 34 SOUTH TAHOE PUBLIC UTILITY DISTRICT 3116M21 Site: MW01.5 WATER QUALITY DATA Area: Emergency Pond MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mgJL mg1L mg1L Comments 01/08/20 6268,90 8.0 7A9 172 1.B5 0.379 04/27/20 626a.80 9.4 7.26 170 1.69 0.336 07/09/20 6268.58 10.4 7.41 168 1.84 0.337 10/08/20 6268.47 9.1 7.43 159 2.54 0.530 Maximum 6268.90 10.4 7.43 172 2.54 0.530 Minimum 6268.47 8.❑ 7.19 159 1.69 0.336 Average 6268-69 9.2 7.32 167 1.98 0.396 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C PH umhos mg1L mg1L mg1L Comments__ 1984 1985 1986 6273.3 8.1 7A 1 402 30.6 4 4.72 1987 8272.9 9.1 6,87 355 23.7 5 2.79 1985 6271.6 9.7 6.97 327 20.7 8 221 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 e 5 0,680 2000 6268.9 9.4 7.08 170 3.0 6 0.650 2001 6268.5 9.3 6.BO 157 2.6 5 0.510 2002 2003 2004 2005 6270.3 9A 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 1❑ 0.482 2012 6268.4 9.1 7.19 159 2.3 0.475 2013 6267.7 9.0 7.10 162 2A 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 626B.7 9.2 7.32 167 1.9B 0.396 Maximum 6278.8 9.8 7.32 402 30.6 10 4.720 Minimum 6267.2 8.1 6.80 157 2.0 4 0.396 Average 6269.8 9.2 7.08 193 5.7 6 0.885 0 Years 24 24 24 24 24 15 24 SOUTH TAHOE PUBLIC UTILITY DISTRICT 311612021 Site: MW02.50 WATER QUALITY DATA Area: Emergency Pond MONITORING WELLS Mean Sea Temp EC Chlarlde CO❑ NO3-N Date Level C pH umhos m 1L m IL m IL Comments 01/08/20 6268,72 8.9 6.86 287 29.4 2.47 04/27/20 6271.57 10.0 6.68 276 27.8 2.23 07/09/20 6268.41 12.7 6.71 259 27.7 1.92 10/08/20 6266,68 10.4 6.77 257 28.4 1.95 Maximum 6271.57 12.7 6.86 287 29.4 2.47 Minimum 6266.68 8.9 6.68 257 27.7 1.92 Average 6268.85 10.5 6.76 270 28.3 2.14 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos m 1L m IL m IL 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 c 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 9.4B 2009 6266.7 10.6 6.49 359 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 3.8B 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 Maximum 6284.1 10.7 8.53 630 63.3 13 18.35 Minimum 6265.9 8.6 6.31 270 28.3 2 2.14 Average 6269.3 10.1 6.65 433 43.8 7 8.55 #Years 27 26 26 26 28 17 26 SOUTH TAHOE PUBLIC UTILITY DISTRICT 31160021 Site: MW03.60 WATER QUALITY DATA Area: Emergency Pond MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N ❑ate Level C PH umhos m IL m & mull- Comments 01/08/20 6266,70 9.1 6.64 367 59.3 0.427 04/27/20 6268.58 10.7 6.44 345 50.2 0.417 07/09/20 6268.31 12.5 6.47 333 53.1 0.553 10/08120 6268.17 10.3 6.56 319 52.0 1.22 Maximum 6268.70 12.5 6.64 367 59.3 1.220 Minimum 6268.17 9.1 6.44 319 50.2 0.417 Average 6268.44 10.7 6,53 341 53.7 0.65 4 4 4 4 4 0 4 Mean Sea Tamp EC Chloride C❑D NO3-N Year Level C pH umhos m 1L m IL m 1L 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 A 6.28 653 68.9 6 1.79 1969 6265.9 11.7 6.39 738 67.3 8 0.88 1990 6265.4 11.3 6.44 814 66.2 10 224 1991 6265.1 10.6 6.52 713 63.6 8 0.75 1992 6265.2 10.2 6.57 666 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 c 5 11.17 1999 6269.2 9.8 6.11 400 38.3 5 4.53 2000 6268.5 10.3 6.46 361 32.0 5 4.85 2001 6268.❑ 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 0.62 2019 6268.8 9.9 6.23 384 69.1 0.60 2020 6268.4 10.7 6.53 341 53.7 0.65 Maximum 6275.7 11.7 6.59 814 104.7 25 28.95 Minimum 6265.1 9.4 5.96 341 32.0 3 0.60 Average 6268.5 10.5 6.32 532 56.8 8 10.11 S Years 37 37 37 37 37 28 37 SOUTH TAHOE PUBLIC UTILITY DISTRICT 311612021 Site: MW04-50 WATER QUALITY DATA Area: Emergency Pond MONITORING WELLS Mean Sea Temp EC Chloride CO❑ NO3-N Date Level C pH umhos mg1L mg1L mg1L Comments 01/08/20 6270.25 7.6 6.49 82.0 6.46 0.048 04/27/20 6269.90 8.9 6.40 87.0 5.87 0.061 07/09/20 6269.66 9.0 6.33 89.3 5.66 0.0B0 10/08/20 6269.17 8.8 6.33 82.0 5.39 0.105 Maximum 6270.25 9.0 6.49 89.3 6.46 0.105 Minimum 6269.17 7.6 6.33 82.0 5.39 0.048 Average 6269,75 8.6 6.39 85.1 5.85 0.074 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg1L mg1L mg1L 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 9A 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 K 5 0.060 1999 6270.1 5.6 6.04 77 5.5 a 5 0.070 2000 6267.9 8.3 6.58 76 5.3 a 5 0.070 2001 6267.6 9.1 6.48 77 4.8 C 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 6.4B 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 ❑.116 2014 6268.3 8.9 6.31 81 5.1 0.298 2015 6267.9 8.9 6.27 91 4.9 0.60E 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 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 6.29 126 12.8 6 0.362 #Years 36 36 36 35 36 27 36 SOUTH TAHOE PUBLIC UTILITY DISTRICT 31M2021 Site: MW07-50 WATER QUALITY DATA Area: Emergency Pond MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos m /L m IL m IL Comments 01/08/20 6279.34 7.0 6.95 181 10.7 0.453 04/27/20 6279.20 7.7 7.31 178 10.3 0.420 07/09/20 6267.86 9.4 6.78 166 10.4 ❑.459 10108/20 6277.94 8.5 7.76 166 10.7 ❑.450 Maximum 6279.34 9.4 7.76 181 10.7 0.459 Minimum 6267,86 7.❑ 6.78 166 10.3 0.420 Average 6276.09 8.2 7.21 173 1❑.5 0.446 4 4 4 4 4 ❑ 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C PH umhos m 1L m 1L m IL Comments 1984 6282.7 1985 1986 6280.7 1987 6277A 7.4 6.61 293 28.2 6 0.570 1988 6274.1 7.6 6.64 291 28.3 8 0.580 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 627❑.8 7.7 6.83 287 30.3 7 0.492 1992 6268.8 6.7 8.71 282 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 6.41 232 183 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 0A90 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 7.6 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 Maximum 6282.7 9.5 7.58 297 30.3 13 0.620 Minimum 6268.8 6.7 6.20 173 10.5 4 0.439 Average 6276.8 8.0 6.64 241 21.3 7 0.535 #Years 36 34 34 34 34 25 34 SOUTH TAHOE PUBLIC UTILITY DISTRICT ar5612021 Site: MW08-25 WATER QUALITY DATA Area: Treatment Plant MONITORING WELLS Mean Sea Temp EC Chloride CO❑ NO3-N Date Level C pH umhos m lL m IL m 1L Comments 01/09/20 6246.72 9.2 6.60 791 25.7 0.074 04/27120 6247.46 10.1 5.27 323 13.0 0.260 07/09/20 6246,30 10.4 6.53 672 24.2 0.016 10/08/20 6245.02 11.9 6.71 907 25.3 a 0.010 Maximum 6247.46 11.9 6.71 907 25.7 0.260 Minimum 6245.02 9.2 5.27 323 13.0 a 0.010 Average 6246.38 10.4 6.28 673 22A 0.090 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride Cfl❑ NO3-N Year Level C pH umhos m IL m IL m IL 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 8.4 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.E 8.7 6.40 701 84.8 43 0.067 1992 6246.6 5.0 6.50 766 73.1 56 0.064 1993 6246.9 8.8 6.38 715 54.9 fit 0.014 1994 6246.8 9.5 6.35 827 50A 65 a 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 a 0.010 2000 6247.3 10.2 6.36 loll 50.3 87 a 0.010 2001 6246.4 10.0 6.38 1017 51.3 86 0.040 2002 6246.5 10.0 6.34 987 41.3 90 0.030 2003 6246.5 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 22A 0.090 Maximum 6248.6 10.8 6.71 1017 143.0 102 6.728 Minimum 6244.3 8.0 5.75 348 11.3 26 < 0.010 Average 6246.9 9.7 6.34 796 50.3 73 0.522 #Years 37 37 37 37 37 28 37 SOUTH TAHOE PUBLIC UTILITY DISTRICT 311612021 Site: MW11 WATER QUALITY DATA Area: Buried Sludge MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C PH umhos m IL m IL m IL Comments 01/09120 6268,35 8.3 6.25 173 21.0 0.030 04/28/20 6267.45 9A 6.22 180 20.9 0.034 07/09/20 6266,97 10.5 6.37 214 30.5 0.049 10/09/20 6266.29 9.6 5.98 510 44.1 0.069 Maximum 6268.35 10.5 6.37 510 44.1 0.069 Minimum 626619 8.3 5.98 173 20.9 0.030 Average 6267.27 9.4 6.21 269 29.1 0.046 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mull- m IL m 1L 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 5.53 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 Maximum 626U 10.7 7.25 269 32.7 11 9.220 Minimum 6257.3 4.7 5.70 59 0.7 3 0.043 Average 6263.7 9.0 6.58 135 5.3 7 1970 #Years 29 29 29 29 29 13 29 SOUTH TAHOE PUBLIC UTILITY DISTRICT 311rv2021 Site! MW12 WATER QUALITY DATA Area; Burled Sludge MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg1L mg1L mg1L Comments 01/09/20 6264.59 8.7 6.67 319 13.4 0.965 04/28/20 6264.80 10.2 6.48 352 14.6 0.832 07/09/20 6263,89 12.3 6.77 347 14.3 0.976 10/09/20 6262.86 11.4 6.44 290 9.93 0,677 Maximum 6264.80 12.3 6.77 352 14.6 ❑.98 Minimum 6262.56 8.7 6.44 290 9.9 ❑.68 Average 6264.04 10.7 6.59 327 13.1 ❑.86 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos m IL mg1L m 1L Comments 1984 19B5 1986 19B7 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 ❑.17 2000 6265.E 8.9 6.42 143 1.9 6 0.21 2001 6262.7 9.1 6.47 105 1.8 6 ❑A3 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 10 9 1.74 2008 6262.5 10.8 6.28 228 2.3 6 1.18 2009 8261.6 12.1 6.25 265 2.3 9 1.43 2010 5261.5 10.3 6.34 368 2.8 8 3.67 2011 6263.8 11.4 6.41 696 7.4 13 7A5 2012 6263.0 10.9 6.44 382 B.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 6Z9 327 13.1 ❑.86 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 6.41 369 6.4 8 4.03 #Years 30 30 30 30 30 13 30 SOUTH TAHOE PUBLIC UTILITY DISTRICT 31M2021 Site: MW13 WATER QUALITY DATA Area: Burled Sludge MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos m IL m IL m IL Comments 01/08/20 6256.55 6.3 7.5 609 39.5 0.969 04/28/20 6258.20 5.4 6.91 720 22.6 7.61 07/24/20 6256.00 9.9 6.86 645 28.7 3.88 10/09/20 6254.86 9.7 7.32 630 29.6 1.52 Maximum 8258.20 9.9 7.80 720 39.5 7.6 Minimum 6254.86 5.4 6.88 609 22.6 0.97 Average 8256.40 7.8 7.23 651 30.1 3.49 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos m 1L m 1L m 1L Comments 1984 1985 1986 1987 1988 1989 1990 1991 1992 8255.0 8.9 6.82 1071 12.1 6.79 1993 6256.6 7.3 6.85 1310 6.3 43.39 1994 8255.3 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 625&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 6.5 6.76 708 4.3 19 3.99 2002 0256.2 7.1 6.90 801 4.2 21 10.08 2003 6256.8 7.5 6.95 904 4.6 21 14.79 2004 0256.5 7.6 6.86 666 4.1 19 10.62 2005 6257.2 7.6 7.04 728 5.4 21 10.27 2005 6257.5 8.2 6.83 826 4.0 23 1011 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 B.93 2010 6256.4 7.7 6.95 750 9.B 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 4AB 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 2016 6257.2 7.8 7.22 633 28.3 4A0 2019 6257.2 7.4 6.95 703 33.3 6.60 2020 6256.4 7.8 7.23 651 X1 3.49 Maximum 6258.0 9.0 7.23 1310 33.3 23 43.39 Minimum 6254.0 6.7 6.76 615 2.9 14 2.50 Average 6256.6 7.8 6.92 786 11.6 20 10.61 #Years 29 29 29 29 29 13 29 SOUTH TAHOE PUBLIC UTILITY DISTRICT M612021 Site: ERB Area: Emergency Pond MONITORING WELLS Temp EC Chloride COD NO3-N Date C pH umhas mg1L mg/L mg1L Comments 08/28/20 20.7 7.25 754 78.6 0.279 09/22/20 15.4 7.56 721 76.3 0.424 10/07/20 18.9 7.39 735 74.4 0336 Maximum 20.7 7.56 754 78.6 0 0.424 Minimum 15.4 7.25 721 74.4 0 0.236 Average 18.3 7A0 737 76.4 0.313 3 3 3 3 0 3 Temp EC Chloride COD NO3-N Year C pH umhas mg1L mg1L mg1L 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 0A00 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 stared 2007 Dry 2008 3.51 MG stored 2009 16.4 735 569 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 A 6.84 86 9.9 0.109 2018 No Sample 2019 6.5 7.63 545 4B.8 0.187 2020 18.3 7.40 737 76.4 0.313 Maximum 21.9 9.47 737 108.9 192 1.332 Minimum 1.1 3.37 86 9.9 9 0.040 Average 12.8 7.24 516 55.1 53 0.332 #Years 20 21 21 20 16 20 ERB and Plant Monitoring Wells WATER LEVEL WATER LEVEL Mean Sea Level Mean Sea Level 02y0 6290 6285 6205 L 6280 6280 6275 - - 6270 • � 6275 ■ y 6265 - LL LL Y- 6260. 6270IN 6255 a - • ~• 6250 6265 - •�_- � —- — 6245 --- f3260 6240 +Control +MW01.5 tMW02 ■ MW03 +MW04 tMW07 —�MW08 NITRATE-NITROGEN NITRATE-NITROGEN 30 25 6 . � ■ 5 20 • J ■ J 4 15 ■ 7a E • E 3 r • x 0 0 gg 72 N n +Control —&--MW01.5 tMW02 -MW03 tMW04 —*---MW07 +MW08 ERB and Plant Monitoring Wells CHLORIDES CHLORIDES 100 150 140 90 + 130 80 120 _ 110 70 .. ■ + 100 60 go 50 ■ • � 70 E 40 -- ■ —• ' 60 � 50 30 40 20 — 30 — 20 - - 10 y 10 p pp 0 t Control t MW01,6 ^+r MW02 MW03 t MW04 marMW07 —t-MW08 CONDUCTIVITY CONDUCTIVITY 100v 1200 900 1000 800 ' ■ 700 f. � ■ r ■ sop 600 O ' E ■_■,• E 3 400 •— ■ -.-- 7 • 400 300 200 200 100 • 0 6 $ 8 S t Control t MW01.5 t MW02 MW03 t-MW04 MW07 t MW08 Buried Monitoring Wells WATER LEVEL NITRATE-NITROGEN Mean Sea Level 50 6280 45 6275 40 35 - 6270 30 6265 J 25 d) E d LL 6260 20 6255 10 6250 5. _ tL945 0 - S 8 8 8 tMW11 tM1N12 tMW13 tMW11 MW12 tMVV13 CHLORIDES CONDUCTIVITY 35 15d0 � 1400 { 1300 30 1 1200 1100 — - 25 — 1000 - 900 - J 20 O 800 — OQ = 700 - — — E 15 7 600 - - -- 500 10 - 400 — 300 - 200 100 0 0 tMW11 - -MW12 tMW13 --4.—M1N11 tMW12 tMW13 HARVEY PLACE RESERVOIR SOUTH TAHOE PUBLIC UTILITY DISTRICT HARVEY PLACE RESERVOIR DATA SUMMARY From: ,January ti,2020 To: December 31, 2020 Temp NH3+ NH3-N Org-N TKN NO3-N NO2-N Total N PO4-P Total P A1k WAS D.O. D.O.% Date pH C NH4 m /l mg/1 mg/1 mg/1 m A m IL m Fl m Fl m 11 mg/1 mg/1 Saturation 1/6/2020 8.12 3.5 24.4 0.351 3.4 27.8 0.787 0.337 28.9 2.58 2.69 173 6.03 56.2 2/5/2020 8.13 2.2 25.3 0.335 1.9 27.2 0,669 0.277 28.1 2.28 2.97 176 14.8 128 3/412020 8.82 7.0 25.7 2.27 0.8 26.5 0.615 0.260 27.4 2.44 2.62 182 16.8 168.9 41812020 8.14 8.9 23.0 0.530 1.0 24.0 0.677 0.163 24.8 2.52 2.58 170 8.88 94.7 5/4/2020 8.37 15A 19.6 1.22 0.4 20 0.687 0.233 21 2.61 2.67 157 7.05 86.0 611f2020 8.90 16.7 18.1 3.59 1.9 20 0.596 0.391 21 2.49 3.10 152 12.54 162.1 6/15/2020 7.65 17.8 3.09 7/13/2020 8.52 21.5 16.8 2.15 1.2 18 1.00 0.461 19 2.66 3.31 150 11.49 159.2 8/11/2020 7.38 22.1 21.9 0.240 0 21 0.451 0.324 22 3.70 3.59 173 4.84 67.95 9/2/2020 7.61 20.3 24.0 0.391 0 22 0.641 0.916 24 3.38 3.72 183 4.76 63.8 10f7f2020 7.90 15.2 25.3 0.547 0 23 0.482 0.612 24 3.97 4.44 187 3.79 46.1 11/4/2020 8.12 11.2 27.8 0.730 0 24 1.16 0304 26 3.14 3.46 182 8.41 92.58 12/1/2020 7.95 6.5 21.9 0.272 0.1 22 0.978 0.553 24 2.69 2.81 172 9.05 88.36 12/10/2020 7.85 7.1 0 7.31 Maximum 8.90 22.1 27.8 3.6 3.4 27.8 1.16 0.916 28.9 3.97 4.44 187 16.8 169 Minimum 7.38 2.2 16-8 0.2 0.0 18.0 0.45 0.163 19.0 2.28 2.58 150 3.09 46.1 Average 8.10 12.5 22.8 1.1 0.8 23.0 0.73 0.436 24.2 2.87 3.16 171 8.49 101.2 #Samples 14 14 12 12 13 12 12 12 12 12 12 12 0 14 12 SOUTH TAHOE PUBLIC UTILITY DISTRICT HARVEY PLACE RESERVOIR DATA SUMMARY From: January 1,2020 To: December 31,2020 Water COD BOD C1 TDS S.S. Turb EC Ca Na Mg SAR Level Flow %Ice Date mgll mg/1 mgm mg11 Mg/1 NTU u51cm mg/I mgll mgll ft. acre-ft Cover 1/6/2020 8.76 58.1 269 6.20 4.4 614 19.4 51.5 4.63 2.73 35 0 2/5/2020 12.4 56.0 264 12.6 6.0 618 19.1 51 A 4.54 2.74 39.5 50 3/4/2020 11.4 55.4 265 16.0 72 602 19.0 49.8 4.46 2.67 42.5 0 4/8/2020 6,20 55.7 259 6.68 1.8 588 18.9 49.2 4.41 2.65 46 0 5/4/2020 16.3 59.5 257 7.31 3.9 548 18.8 50-0 4.51 2.69 48 0 6/1/2020 23.0 58.4 256 35.8 12 526 18.7 50.6 4.55 2.72 49 0 6/15/2020 7.32 552 47.0 0 7/13/2020 14.4 58.1 283 32.4 12 558 18.8 53.1 4.72 2.83 39.5 0 8/11/2020 5.51 64.2 278 4.35 3.6 636 20.0 56.0 4.89 2.91 29.0 0 9/2/2020 31.3 67.4 287 37.3 22 656 20.5 59.6 4.88 3.07 14.0 0 1OrV2020 14.8 71.4 296 24.6 16 689 20.7 61.3 4.93 3.14 10 0 11/412020 11 A 65.1 287 12.0 6.1 639 22.6 58.6 5.19 2.89 20.0 0 12/1/2020 NV 60.6 269 102 6.8 636 22.3 54.9 4.96 2.74 27.5 0 12/10/2020 4.53 633 29.5 0 Maximum 31.3 71.4 296 37.3 22 689 22.6 61.3 5.19 3.14 49.0 0 50 Minimum 4.53 55.4 256 4.35 1.8 526 18.7 49.2 4.41 2.65 10.0 0 0 Average 12.9 60.8 273 17.1 8.5 607 19.9 53.8 4.72 2.82 34.0 4 #Samples 0 13 12 12 12 12 14 12 12 12 12 14 0 14 SOUTH TAHOE PUBLIC UTILITY DISTRICT HARVEY PLACE RESERVOIR DATA SUMMARY From: January 1,2020 To: December 31,2020 Coliforms Fecal Air Algae Weeds Total Fecal/E. soli Strep Temp SO4 Boron Date MPN MPN MPN C mg1L mg/L Comments 1/8/2020 No No 61.3 <1 4.9 19.4 2/5/2020 No No 7.4 <1 3.7 18.8 3/4/2020 Yes Yes 12.2 <1 11.7 17.8 4/8/2020 No No 35.0 <1 7.4 16.8 5/4/2020 No No n 2420 1.0 12.0 16.7 6/112020 Yes No 2420 46.4 14.0 15.9 W15/2020 Yes No 2419 1.0 21.0 7/13/2020 Yes Yes 2750 5.2 23.1 16.6 8/11/2020 Yes No 158 3A 23.9 16.6 9/2/2020 Yes Yes 214 6.3 21.3 19.4 1 01712 0 2 0 Yes No >2420 15.8 14.9 15.7 1 1/412 020 Yes No 6510 9.8 29.0 22.3 12/1/2020 No No 548 8.6 17.0 25A 12/10/2020 Maximum 6,510 46.4 29.0 25.4 Minimum 7.4 < 1 3.7 15.7 Average 1,376 10.8 15.7 18.5 #Samples 13 13 11 9 13 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_0. Q.O. Year pH C NH4 mg1I mgN mgll mgll mg11 mg1L mgll mgll mgll mg/1 mgll %SAT 89 8.10 13.5 8.59 0.264 1.53 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 ❑.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 5.03 023 14.30 2.90 3.05 70 ❑.060 7.49 84.49 94 7.80 11.1 15.5 0.223 1.65 16.8 2.85 ❑.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 1951. 226 2.49 119 0.060 8.11 93.85 96 7.80 13.8 14.1 ❑.472 1.88 15.9 1.12 0.27 17.24 2.06 2.13 116 0.060 744 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 ❑.030 7.48 83.93 98 7.65 11.7 13.9 15.6 1.73 0.31 17.63 2.27 228 110 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 B-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 0.517 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 1.58 16.2 ❑.93 ❑.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 1❑ 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 7.6❑ 12.0 15.4 ❑.291 17.90 18.2 2.90 0.61 21.70 2.53 2.59 133 6_54 72.70 13 8.17 11 A 12.0 0.943 5.51 17.5 3.87 0.60 2201. 2.13 2.44 113 8.97 94.88 14 8.23 11.3 14.4 1.11 2.50 17.❑ 2.80 0.49 2024. 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 ❑.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 ❑.86 ❑.52 24.39 2.62 2.89 157 8.24 91.9 20 8.10 12.5 22.8 1.05 ❑.13 23,0 0.73 0.44 24.18 2.87 3.16 171 8.49 101.16 Maximum 8.41 14.5 22.82 1.456 17.90 24.13 9.93 0.85 25.33 3.60 3.86 171 ❑.080 9_65 104.52 Minimum 7.51 10.7 2.78 0.083 0.13 4.41 0.56 0.13 13.88 1.77 2.03 53 ❑.030 6-54 69.93 Average 7.89 12.4 14.18 0.513 2.66 16.17 2.55 0.42 19.13 2.48 2.71 116 0-062 7.90 89.11 #Years 32 32 32 31 30 32 32 32 32 32 32 32 12 32 32 SOUTH TAHOE PUBLIC UTILITY DISTRICT HARVEY PLACE RESERVOIR DATA SUMMARY From: 1989 To: 2020 Water COD BOA CI- TES SS Tur6 EC Ca Na Mg SAR Level Flow % Ice Year mgll mill mgll mgm mill NTU u5/rm mgA mg/I mgll ft. acre-ft Cover 89 25.3 2.95 89.2 357 21 A 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 16A 84.3 3.55 4.91 3&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 46A 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 45A 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 2&1 7.40 490 16.2 45.8 3.68 2.67 40.9 3 02 29.7 523 57.5 237 9.32 4.04 466 15A 44.8 3.51 2.68 37.4 0 03 31.3 4.75 56.8 235 8.38 4.14 484 15.3 452 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 4&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 12.21 435 162 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 11.5 522 269 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 3.80 228 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 50.4 447 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 Maximum 47.0 14.61 93.5 369 62.20 3623 635 19.9 92.9 4.72 5.04 45.4 491 17 Minimum 18.6 2.93 42.2 205 4.81 3.13 397 14.4 22.4 326 1.37 32A 303 0 Average 32.1 6.92 56.9 254 15.93 7.38 502 16,7 50.5 3.73 2.93 39A 397 5 #Years 23 32 32 32 32 32 32 32 32 32 32 32 2 32 SOUTH TAHOE PUBLIC UTILITY DISTRICT HARVEY PLACE RESERVOIR DATA SUMMARY From: 1989 To: 2020 Coliforms Fecal Air Algae Weeds Total Fecal/E soli Strep Temp SO4 Boron Year MPN MPN MPN C m IL m IL 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 18.2 022 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 1&8 0.24 06 341 53 168 14.5 14.3 0.16 07 ill 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 10A 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 10A 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 Maximum 25,843 187 422 20.3 42.8 0.37 Minimum 2 < 2 < 2 5.9 12.5 0.08 Average 2687 37 95 13-6 20.0 0.23 #Years 32 32 26 32 31 26 NO3-N & NH3-N Total Phosphorus 25 � 6 — *-,f l 20 { 5 it 4 '1 15Im A = ■ CD E 3 as 1 *a_ 10 2 f 5 A, 1 laaa-a►�C`ia-►ar�aa� 'ALyaa 0 0 89 90 91 93 93 94 95 96 97 98 99 00 01 02 03 04 05 OB 07 08 09 1❑11 12 13 11 15 16 17 16 19 20 69 90 91 92 93 94 95 96 97 96 99 DO 01 02 03 04 05 OB 07 H 09 10 11 12 13 14 15 16 17 18 19 20 T ND3N T W-N • T—I Phou.-— —,Jowl Phrphoj Chlorides Total Dissolved Solids 140 500 450 120 400 j 100 350 'WAy 1 BO 300 1 � � A iv ab 250a a E 60 E' _ �� 40 a a� 150 20 100 50 -- 0 0 a H9122'33 94 95 95 97 96 99 OD 0102030405060706091011121314161617181920 6a OD 91 W 93 94 95 96 97 9E 99 IV 01 02 03 04 08 06 07 08 M 1011 12 1314 15 16 17 1 a 1929 —1�[hk' Linear(Chlonde j MS L^ear 1-05) Harvey Place Reservoir Recycled Water Current Storage Not including 200+1-acre-foot dead pool Maximum Storage,Acre-feet: 3,800 Stored Remaining Date Acre-feet Acre-feet 01/01/16 743 3,057 02101116 1,185 2,615 03101116 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 11/01116 243 3,557 12MV16 479 3,321 01/01/17 940 2,660 02/01/17 1,843 1,957 03/01/17 3,082 718 04101/17 3,460 340 05101117 3,005 795 06/01/17 2,517 1,183 07101117 2,210 1,590 08/01117 1,626 2,174 09/01/17 876 2,922 10/01117 114 3,686 11/01/17 220 3,580 12101117 544 3,256 01/01/18 676 2,922 02101/18 1,177 2,623 031D7118 1,410 2,390 04101/18 1,938 1,682 05/01/18 2,246 1,554 06/01/18 2,465 1,335 07101118 1,927 1.873 08/01/18 1,240 2,550 09101/18 531 3,269 10/01/18 88 3,712 11/01/18 206 3,594 12101118 453 3,347 ❑1101119 781 3,D79 021D 1119 1,131 2,659 03101/19 1,714 2,086 04/01119 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 3,563 12101/19 472 3,328 01/01/20 798 3,002 02101/20 1,063 2,737 03101/20 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 07101/20 1,395 2,405 08101/20 750 3,050 09101/20 137 3,863 10101/20 72 3,728 11/01/20 222 3,578 12101120 472 3,328 F 111PR1NP4 Cuirxil Slni a.la-Lahoirlar_Raprl Harvey Place Reservoir Recycled Water Storage 4,000 3,500 3,000 2,500 2,000 1,500 1,000 500 V mmcp cp cp cpmmmmcp cp r-nnn n nnn nnn_ncam0000ma00000car000mrnwrna�rnrnrnrnrnrnrnrn000000000aoo _ _ r=N N N N N N N N N N ANC]Pr�[]gI+a as N�N C741(5 Ca iz-w WO -CV CmC V LOf.9 f-m0) N M V U7 ID I+M O]��N N C7��S7(.9 f�OD 67OrN O O CD O O O O O O r r r O p p p O p p p O r r r O 0 0 0 0 0 0 4 0 r r r p n 4 n n n n 4 n r r r 4 4 4 O O 4 4 4 r r r Storege 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 far 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 D❑ 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) mg1L 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 :5 10 mglcu meter a) Trophic State Index Composite index 5 45 units (TSI) 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 2 n d quarter of 2009. Regular operation of the HOS started in June 2009. a4 v ICR•01 - ICR-06 w ' J � IGR-07 1 F* 1 _ 1 - - JCR-03; `r _ \It {ICR•09 ICR-10,t ICR-11 -r r - { ICR-05,t ~- n _ � G i ' •+A •`- JCR-12 n 1 Image USDA Farm 5.eivlce Agency 945 It 201D Gaggle Imagery Dale May 25.2009 lat 38:747380" Ion -119 779387' eley 5605 It Eye A 9379 It �� SOVTIi TAHOE PUBLIC UTILITY DISTRICT INOIAN CREEK RESERVOIR DATA SUMMARY 2020 Secchl Doplh Told P DO. O 0- Chlorophyll Dapth NH3-N Org-N TKN NO3-N NO2-N Tolal N PO4-P cam bile Ft 3i SAT mghn' fl. MLUI m N gA m rl m 1162020 ICR-01 Inaccessible 2W020 ICR-01 I nacceouible 3131/2020 ICR-01 Inaccessibla 4/152020 ICR-D1 0.6 0 029 10.69 95.5 16 4.2 -DON ❑36 0.36 c 0 010 c D 01 D 036 a 0.01 D 4115RO20 ICR-D1 21 3 o O37 10.61 91.9 17 e❑o20 050 0.50 0.010 0.01❑ 05 r 0.01 D 4115f2020 ICR-01 392 ❑040 10.50 91 20 e 0 020 034 034 0.010 e 0 01 D 034 •0 01 o 4/152020 ICR-03 05 0 Dal 10.37 93.3 15 5.4 c 0 020 036 0 36 0 010 e❑010 036 0 01 o 4/1512020 ICR-03 241 0042 lo.e4 91,5 14 c 11020 049 ❑49 a 001D c 001D 048 •00111 411542020 ICR-05 0 5 0 032 11.07 99.1 12 4.4 c 0 020 1)27 027 r 0 010 0 010 0.27 a 11.01❑ S✓&2020 ICR-DI 0.5 0029 9.77 95.7 11 3.8 D027 046 11.49 c 0.010 c 0-010 OA9 c D.010 515 N20 ICR-01 21 0037 0.91 B6.5 15 0042 046 050 c 0.010 s D.011) OS 0.010 SMLQ020 ICR-01 42 0.040 6.8o 554 14 QA4 050 0.54 •0.010 r 0010 0.54 c 0.010 SMLQ020 ICR-03 05 13029 9.45 93.6 21 3.7 0.026 050 0B1 s 11010 c 0.010 04" a 0010 Sd6R020 ICR-o3 263 D.046 8.9 B4.4 19 0.047 050 055 c 0.010 c 0.010 O55 t 0,01D S164020 ICR-05 0,5 0032 9.69 95.9 14 3.5 0033 1).67 070 c D.010 0010 07 D,013 613R020 ICR-D1 05 D024 0.82 93.5 3 14.4 0048 363 0.66 c 0.010 a 0011) ❑00 0022 81312020 lCR-D1 12 0026 9.05 05.2 3 004B 066 0.71 0.01 t O,O1D 072 c 0010 el32020 ICR-01 39 D049 5.12 5D.4 2 0332 0.77 11 D.Ol6 0.010 1.1 002 813R020 ICR-03 05 0-020 D.29 90.1 c1 13 0.047 066 1)73 0010 a 0010 073 s 0010 W3R020 ICR-o3 24 3.015 7.68 77.8 5 0046 060 065 001 c 0010 OBe a 0.010 Wa020 ICR-D5 0,5 D017 9.51 99.6 4 13.2 0044 0.75 079 c 0.010 c 000 070 c 0010 7R3R021) ICR-D1 0.5 D 026 7.75 Ba.5 6 5.3 D DOS 078 085 c 0010 e 0 010 0 65 0 010 7123f2O20 ICR-01 2D 9 0 026 6.39 703 4 0 087 065 074 r 0 010 c O 010 074 c 0.010 7r2312020 ICR-01 421 0.043 5.79 63 3 16 0 136 0.64 0-70 0.011 c 01110 0 76 c 0 010 7R32O20 tCR-03 0.5 0026 7.82 55.5 5 6.6 0.077 0-60 D.6B D.010 c 0.010 065 a O.OID 7123R020 ICR-03 27-1 D-043 3.65 42.3 5 0.005 062 1)71 c 0010 c 0.010 071 a D.O1D 7,2312020 ICR-05 05 D.028 7.52 64.9 4 8.6 0076 0,75 083 c 0.010 c 0010 D83 c 0010 SR712020 ICR-01 1).5 D 036 8 A 4 91.3 13 4.6 c 0 020 070 070 c 0.010 c O O I O 07 001 SR712021) ICR-D1 213 0043 5.1 562 11 -0.020 0.87 007 c 0010 K 0.1110 067 c 0010 5R712020 ICR-01 39 D 060 1.06 11 5 9 0.079 072 0.90 0 010 0 No 0.6 c 0 010 5272020 ICR-03 05 0.040 7.99 69.4 11 4.4 c 0 020 071 071 s 0 010 O.D1 O 071 c 0 010 8I27202D ICR-03 24.1 D045 6.69 73.4 11 c 0020 0.713 07e a 0,010 0.010 076 t 0010 8f27R020 ICR-05 05 D 036 e.24 92.4 9 4.6 c 0.020 076 0 76 c 0010 c 0 010 076 0 01 9R32020 ICR-01 05 11048 8.76 97.9 15 3.6 c 0.020 055 D68 0010 c 0.010 DOB 0,012 A232020 ICR-DI 21 1 D 051 7.75 769 12 0 020 0.06 088 c 0.010 c 0 010 0,6B O 013 923f2021) ICR-01 36 0.055 7.34 726 15 0.023 0.71 0.73 c 0010 s 0D10 3-73 c 0010 M2 QO20 lop-03 06 0 051 8.89 6D.3 13 4t t 0.020 059 0 59 c 0 010 a 0-010 059 c 0.010 9l232D20 ICR-03 24 0.052 6.28 619 14 c 0020 0.73 0-73 a010 0.010 0.73 0012 9I2 2020 ICR-OS 0.5 0.049 a.44 84.7 14 3.4 c 0 020 0 77 0.77 e 0 010 c 0 010 077 0 010 12812020 ICR-DI 05 0041$ 9A2 B1.4 22 4.6 c 0.020 O55 055 01110 c 0010 055 0.010 I MaI 02o ICR-DI 152 (1045 9.61 76.6 21 0020 050 080 c 0010 c 0010 06 c 0010 1 oReQW) ICR-DI 39 1 0 054 7.7 6B.5 25 a 0,00 049 0.49 c 0 D10 0 010 049 0.010 10(280),D ICR-03 05 0.041 8.8 70.1 19 4 6 •0 O20 0.54 054 0 010 c 0 010 054 c 0 Ol0 1028202D ICR-03 241 0 050 5.57 76.2 21 0 020 D 72 074 e O o10 c 0 010 0-74 c 0.010 128202D ICR-05 05 11.045 0.9 79.3 22 6.3 c 0 D20 0 72 0.72 c 0 D10 c 0 010 0.72 O-D1O 11119f2020 ICR-GI D-5 0.044 10.6 63.6 26 4 3 0 027 ❑55 0.68 c 0.010 0 010 065 0 D10 I Ill St2020 ICR-GI 21 D.055 10.3 81 25 0 032 0 37 0.40 c 0.010 0-010 04 c 0 010 11119f2021) ICR-Dl 36 D 054 10.3 60.7 26 0.031 057 0.70 0 010 -0.1)10 D 7 0 D1O 1111 SINN ICR-03 D 5 0 046 10.2 81.3 27 30 0 026 0.44 OA7 c O D10 e 0 010 0.47 c O.010 1111912020 ICR-03 21 1 0.054 10.5 82.2 21) 0 027 0.69 072 c 0-010 c 0 010 072 c 0 No I Vi 902020 ICR-05 0.6 0049 10.1 80.2 25 4.3 0025 060 062 a 0DID 0.010 0e2 a O.D10 12/82020 ICR-01 05 0 039 11.2 65.1 14 4.7 c 0 NO 1 1 1 1 c 0 010 c 0 010 1.1 O.D10 12M2020 ICR-01 15 D.044 11.2 B3.S 21 0 020 1 3 1 3 0 010 0 010 1 3 0 D13 12 ?2020 ICR-01 35 11.047 112 84A 17 t 0.020 1 1 1 1 c 0 010 a 0 010 1 1 c 0 010 1ZEU020 ICR-03 0.5 0042 10.8 81.7 19 4 5 e 0 No 1 0 1 0 0.01❑ c 0 010 1.0 c 0 D10 12AW020 ICR-02 1B 11.054 11.2 64.4 17 c 0 020 0.69 0-69 0 o10 c 0 010 o a9 s 0 010 1281t2020 ICR-05 0.5 0.045 11.3 85.5 19 46 c 0 020 0 75 0.78 a 0.010 c 0 010 0.78 e 0 O10 Maldmum 4211 0 050 11 30 99.6 27-0 14-40 0."2 0.971 1 No 0.018 a 0.010 1 300 0.022 Minimum (1.5 0 017 1.06 11 6 11) 3.40 c 0.020 0.375 0 270 e 0 010 c 0 010 0 270 c O.D1 O AveFoge 13.9 0.041 080 61 7 14.7 5 65 0 040 D 679 0-599 0 DID 0 010 0 700 0-511 0$amples 54 54 54 54 53 27 54 54 54 54 54 54 54 SOUTH TAHOE PUBLIC UTILITY DISTRICT INOIAN CREEK RESERVOIR DATA SUMMARY 2020 Lake Depth Temp Alk CL- TDS S.S. Turb EC Ca Na Mg SAR Leval %Ice Date Site Ft C. PH fn2 rnQA m9il mQfl NTU u5lcm m A m A rnqA It Cover Algae Weeds 11612020 ICR-DI InawA ssibl VW020 ICR-01 Inacce ssibl 3 13112 02 0 ICR-01 Inacce s slbl 411 512 02 0 ICR-01 0.5 10.3 8.69 128 56 98.7 0 No No 411 512 02 0 ICR-01 21.3 9 8.61 126 5.1 987 411512D20 ICR-01 39.2 6.8 6.47 128 6.4 987 411512D20 ICR-03 0.5 10.7 6.76 125 5.5 99 411512D20 ICR-03 24A 6.7 6.58 1.24 6 0 98.6 411512D20 ICR-05 0.5 10.4 6.72 125 59 90.6 51612020 ICR-D1 0.5 14.4 8.63 44 124 62 6.4 94 100 0 Yes Yes W7020 ICR-01 21 14 5.72 44.3 126 63 736 8.9 100 W2020 ICR-01 42 13.6 8.49 44 126 65 816 8.7 100 510r2020 iCR-03 0.5 14.8 9.D6 442 126 fit 656 97 100 51612020 ICR-03 26.3 13 8.75 44 125 03 900 9 too 51612020 ICR-05 0.5 14.9 8.9 43.6 122 66 688 91 100 613=20 ICR-01 0.5 18.2 9.11 112 14 943 D No Yes 61312020 iCR-01 12 17.7 9.5 1 12 26 93 9 613✓1020 ICR-01 39 14.6 8.44 121 18 982 613✓2020 ICR-03 0.5 18 9.20 111 1.1 94 613r2020 ICR-03 24 16 8.69 1.13 0.94 94.1 613(2020 ICR-05 0.5 17.6 9.45 11 13 93.6 7QX2020 ICR-01 0.5 20.8 8.71 141 i 5 95.4 0 Yes Yes 7Y2312020 ICR-01 20.0 20 7.85 1 35 2 95 0 712312D20 ICR-01 42.1 19.7 7.75 135 37 06.5 7/23/2020 ICR-03 0.5 21.1 8.56 1.34 1.4 95.3 7/23/2020 ICR-03 27.1 19.9 7.65 125 6 95.11 7/23/2020 ICR-05 0.5 21A 0.46 132 1.8 95.7 812 712 02 6 ICR-01 0.5 21 9.65 44.4 114 65 5.78 5.9 97.2 0 Yes Yes B1`7712020 ICR-01 21.3 20.2 9.03 44.2 1.12 65 6.28 6A 94.1 812 712 02 0 ICR-01 39 19.9 7.65 44.8 1.14 66 9.88 9 95 5 6r2712020 iCR-03 0.5 20.9 9.72 44.4 1 12 63 5 96 6.7 96.8 012 712 02 0 ICR-03 24.1 19.9 9.57 44.4 1 13 69 66 6 964 8/27/2020 ICR-05 0.5 21 9.75 44.8 1 11 66 5.76 64 97 0/23/2020 ICR-01 0.5 15.6 9.55 134 7.7 94.6 0 Yes Yes 912312D20 ICR-01 21.1 15 9.10 1.28 8.9 93.8 912 312 02 0 ICR-01 36 14.8 9.14 126 9 936 9R312020 ICR-03 0.5 15.5 9.6 128 0 94.5 9(2012020 ICR-03 24 14A 9.27 1.27 92 94 9r2312020 ICR-05 0.5 15.6 9.56 1.28 8.4 94.8 1 012 812 02D ICR-01 0.5 10.7 9.09 1.42 5 106 0 yes yes 1 012 812 02D ICR-01 16.2 102 9.38 1.43 4.7 109 1 012 612 02 0 ICR-01 39.1 10.2 9.04 1.43 13 107 1 012 612 02 0 ICR-03 0.5 10.5 9.37 142 51 109 1 012 612 02 0 ICR-03 24.1 10.2 9.03 141 5 109 1 012 012 02 0 ICR-05 0.5 10.2 9.41 1.41 42 109 1 111 912 02 0 ICR-01 0.5 5.4 8.44 46.4 1.4 74 638 44 112 0 Yes Yes 1 111 912 02 0 ICR-01 21 5.1 8.03 40.8 1.41 76 778 53 112 11119/2020 VCR-01 36 5 7.98 46.6 1.41 66 6.43 6.8 112 1 111 912 02D ICR-03 0.5 5.5 8.02 46.8 1.41 66 6 02 5 1 113 1 Ili 9/2020 ICR-03 21.1 5 B.38 47.2 1.43 69 7.1 5 5 112 1 111 912 02 0 ICR-05 0.5 5.6 8.06 46.8 145 70 715 52 113 121BI2020 ICR-01 0.5 3.6 8.22 155 42 100 5 Yes NO 121BI2020 ICR-01 18 3.5 0.12 16 4.2 100 121812D20 ICR-01 36 3.5 0.13 1 6 4 4 100 1 21812 0 2 0 ICR-03 0.5 3.7 8.5 1.52 4.2 102 12180020 VCR-03 18 3.7 8.38 1.52 4.5 100 12MOD20 ICR-05 0.5 3.7 8.78 154 4.4 101 Maximum 42A 21.4 9.75 472 1 6o 78 900 1300 113 000 ❑00 000 0 OD coo 5 Minimum 0.5 35 7.65 43.6 1.10 62 5 78 094 94 000 000 0 DO 0 OD coo D Average 139 12.9 0.78 451 131 67 7.09 5.59 100 1 #Samples 54 54 54 18 54 10 18 54 54 0 0 0 0 0 9 9 9 SOUTH TAHOE PUBLIC UTILITY DISTRICT INDIAN CREEK RESERVOIR DATA SUMMARY 2020 Coliforms Fecal Air Depth Total FecaVE coli Strep Temp SO4 Baron Fe Mn Date Stte Ft MPN MPN MPN C mg/L m 1L ug1L u IL 116/2020 ICR-01 Inaccessihl, 215/2020 ICR-01 I na cces sih 1, 3131/2020 ICR-01 Inaccessihl. 411M020 ICR-01 0.5 5.2 1 16A 0.939 411 W020 ICR-01 21.3 0,935 411512020 ICR-01 39.2 0.93 411512020 iCR-03 05 3.1 1 0.92 4/1 512 0 2 0 ICR-03 24.1 0-928 411512020 ICR-05 0.5 12-1 1 0.918 51612020 ICR-01 0.6 7.5 1 18.5 0.901 5/612020 ICR-01 21 0.921 5/612020 ICR-01 42 0.917 51612020 ICR-03 0.5 0.6 < 1 0.909 51612020 ICR-03 26.3 0.900 5/812020 ICR-05 0.5 9.8 C 1 0.668 OIT2020 ICR-01 0.5 12.2 1 27.1 0.965 6I312020 ICR-01 12 0.962 6/312020 ICR-01 39 0.999 6IW2020 ICR-03 0-5 1 1 0.961 6/312020 ICR-03 24 0.967 M12020 ICR-05 0.5 4.1 < 1 0.96 7/23/2020 ICR-01 0.5 27.5 r 1 23.9 1.10 7I2312020 ICR-01 20.9 1.07 712312020 ICR-01 42.1 1.07 7/2 312 0 2 0 ICR-03 0.5 272 t 1 1.07 712312020 ICR-03 27-1 1.02 7/2312020 ICR-05 0-5 34.1 <1 1.06 8/27/2020 CR-01 0.5 112 < 1 27.8 1.04 8/27/2020 ICR-01 21.3 1.03 8/27/2020 ICR-01 39 1-03 8127/2020 ICR-03 0.5 153 1 1.03 8127/2020 ICR-03 24.1 1.03 812712020 ICR-05 0,5 120 1 1,02 9/2312020 ICR-01 0.5 17.1 < 1 27.7 1,03 912312020 ICR-01 21.1 1-01 912312020 ICR-01 36 1,02 912 312 02 0 ICR-03 0.5 13.5 1 1.00 9123/2020 ICR-03 24 1.01 9123/2020 ICR-05 0.5 15.6 1 1.00 1012812020 ICR-01 0.5 26.2 6.3 10.6 1.03 1012&2020 ICR-01 16.2 1,02 10/2812020 ICR-01 39.1 1,07 1012812020 ICR-03 0-5 33.6 9.5 1,02 10/2812020 ICR-03 24.1 1,01 10/2812020 ICR-05 0.5 32.3 15 1,01 11/1912020 ICR-01 0.5 43.5 2 11.3 0.966 11/1912020 ICR-01 21 0.988 1111912020 ICR-01 36 0,992 11/1912020 ICR-03 0.5 44-6 1 0,992 11/19/2020 ICR-03 21.1 0-997 1 111 912 02 0 ICR-05 0.5 52.1 5.2 1.00 1 21612 0 2 0 ICR-01 0.5 8.5 6.3 13.7 1.05 121812020 ICR-01 18 1.06 1218/2020 ICR-01 36 1.06 1 21812 0 2 0 ICR-03 0.5 2 < 1 1.04 121812020 ICR-03 16 1,02 121BI2020 ICR-05 0.5 2 r 1 1,02 Maximum 42.1 153 15 0 27.8 1.10 0 0 Minimum 0.5 1 < 1 0 10.6 0.89 0 0 Average 13.8 31 2 19.7 1.00 #Samples 54 27 27 0 9 54 0 0 0 SOUTH TAHOE PUBLIC UTILITY DISTRICT INDIAN CREEK RESERVOIR DATA SUMMARY From: 1980 To: 2020 Semhi NH3+ Total P D.O. ❑O Chlorophyll Depth NH4 NH3-N pry-N TKN NO3-N NO2-N Total N PO4-P Year m II m II %SAT m 1m' ft. m IL m 11 m II m II m A mgA m IL m II 80 0.305 8.75 888 1.227 0.080 1 351 2.578 3 465 0201 624.4 0 212 81 0.267 10.28 122.8 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 ❑190 6 916 0 421 83 0.575 10.22 1166 ❑474 0.139 1 223 1 697 3 419 0 125 5 241 0 472 84 0.459 10.35 1158 0.476 0 120 1 350 1.799 3 356 0 154 5 309 0 339 85 0.219 9.93 112.6 0.529 0 142 1 585 2 212 2 722 Oils 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 ❑174 8 447 0.058 88 0.095 9.13 105.3 4 661 0 097 2 194 6 655 6 406 ❑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 ❑140 0 062 1 178 1 318 ❑705 0 028 2 051 0 078 91 0.299 8.91 1029 ❑206 0 074 1 889 2095 0.289 0 015 2 374 0 143 92 0 316 8.90 1054 ❑082 0 040 2 828 2 910 0 038 0 011 2.959 0 136 93 0.778 8.72 102.6 ❑171 0.029 8 453 8624 0 150 0 013 8 054 0 115 94 0 179 8.15 91 0 ❑138 0 038 1 573 1.711 ❑039 ❑014 1 764 0 080 95 0.344 8.57 102.1 0.203 0.050 5.542 5.744 0.068 0 012 6.823 0.061 96 0.600 9.00 1063 0.100 0 030 6.110 6 220 ❑040 ❑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 1021 0 088 0.013 ❑655 0 743 0 089 0 010 0 840 0 011 99 0.076 8.50 948 3 98 0 072 0 010 0 913 0 985 ❑023 < ❑010 1 018 0 012 00 0 078 6.70 71.6 240 267 ❑.154 0.011 ❑927 1 080 0 070 t ❑010 1 161 0 013 01 0.053 6.12 726 114 562 0 054 0 011 0 860 0 913 0 010 ¢ 0 010 0 933 0 015 02 0.045 6.75 74.2 133 7.47 0.078 0.015 0.825 0 903 0 038 < 0 010 0 951 0 015 03 0.044 7.87 86.5 14.2 8.21 0.119 0 024 0.759 0 881 0 033 < 0 010 0.922 0.013 04 0.042 6.43 745 156 1025 0.105 0.013 0 845 0 941 0 030 < 0 010 0 982 0 015 05 0.043 7.25 60.4 9.7 6.50 0.094 0.011 0.870 0.964 0 043 < 0 010 0 988 0 013 06 0.069 6.54 694 13.9 5.15 0.160 < 0 010 0.621 0.781 0 045 c 0 010 0 836 0 015 07 0 057 6.66 76.1 148 4.72 0 106 0 013 0 899 1 005 0 031 c 0 010 1 047 ❑013 08 0.071 6.66 802 21.0 3.77 0 076 0.011 1 149 1 225 0 048 < 0 010 1 282 ❑018 09 0.067 828 98.9 162 448 0 D46 0 013 1 249 1 295 0 021 < 0 010 1 326 0 013 10 0.042 7.80 91.8 11 1 759 0.029 0 011 ❑801 0 829 ❑019 < ❑010 0 858 0 011 11 0041 697 80.6 92 819 0055 0010 0512 0568 0013 [ 0010 0591 0012 12 0.037 7.87 90.5 4.8 10.95 0.086 0.015 0.667 0.754 0 034 c 0 010 0 798 0.012 13 0.035 8.45 98.4 7A 10.64 0.049 0.020 ❑727 0.776 0.027 c 0 011 0 797 0.012 14 0.037 907 912 99 725 0D41 0021 0751 0.762 0012 c 0010 0786 0012 15 0.045 9.74 938 199 786 0.031 0 022 ❑992 1.023 0 013 0 010 1 028 0 010 16 0.034 9.37 88 1 10.3 987 0 039 a 0 020 ❑660 0 691 0 027 c 0 010 ❑714 ❑011 17 0.047 8.25 75 1 161 554 0 071 s 0 020 ❑.517 0 561 0 020 0 010 ❑593 ❑012 18 0.045 8.59 81.3 15.7 436 0 031 -c 0.020 ❑679 0 697 0 012 c 0 010 ❑703 ❑012 19 0.044 8.70 80.6 146 3.57 0 D46 0.003 0 699 0.728 0 010 t 0 010 ❑731 0 010 20 0.041 8.80 817 147 585 0 D40 0 006 0 669 0 699 0 010 < 0 010 0 700 0 011 Maximum 0.778 10.35 122.8 240 1095 4.661 0 331 8.453 8624 7 454 0.315 13 421 0 472 Minimum 0,034 5,12 69.4 48 267 0 029 c ❑003 0.512 0 568 0.010 - 0.010 0 591 0 010 Average 0.164 8.45 93.9 13.7 6.57 0.460 0.055 1.504 1.960 1 093 0 050 3.078 0.069 #Years 41 41 41 21 22 41 41 41 41 41 41 41 41 Note-Chromogenic Substrate test for Total Coliform and E.ooli begun in November 2014 SOUTH TAHOE PUBLIC UTILITY DISTRICT INDIAN CREEK RESERVOIR DATA SUMMARY From 1980 To: 2020 Lake Temp Alk MEAS CO❑ SO❑ Cl- TDG S.S. Turb EC Ca Na Mg GAR Level %Ice Algae Weeds Year C. pH mgll mg1I mg11 mg1I mgll mgA m911 NTU u3icm mgll mg1I mgll H Cover 80 12.9 8.47 75 0.05 24.8 2.80 132.2 459 8 16 2.20 605 6453 72.33 237 2.38 49.81 4 81 14.4 9.3 78 ❑.04 24.1 2.23 103.1 457 5.74 2.22 653 72.00 48.50 1 94 153 4920 0 82 126 8,74 91 0,04 257 2.73 62.4 363 0,84 3.74 579 5934 42.95 246 147 52.36 7 83 12.3 915 101 003 228 2.28 81 2 344 469 356 553 5539 4394 257 1 56 51.86 1 84 12.4 9,12 115 0.03 24.1 3.03 92.2 381 835 3.67 627 61 83 61 36 252 207 51.42 2 85 13 5 904 75 ❑.05 31 1 4.63 107 405 1564 6.62 682 4343 8358 273 344 4938 8 Be 14.2 8,88 55 0.05 28.9 3.71 72.9 315 19,44 10.73 517 2343 7396 275 383 46 87 0 87 12.9 84 74 003 28.8 4.69 114 450 1434 4.44 766 29.75 110.92 314 521 46.10 8 88 13.6 7.74 60 003 147 5.12 138 509 1900 3.01 891 2450 134.17 326 674 45.99 4 89 12.9 8,84 47 0.02 21.8 2,05 113 457 710 3.68 786 2426 111.58 288 589 41 43 13 90 13.8 955 67 0.02 27.8 2.42 82.5 426 8,33 4.38 687 35.08 92.33 303 402 2700 14 91 13 1 9.23 69 002 42.2 8.27 27.6 205 2036 17.38 297 2245 3200 261 1 68 17 92 13.8 955 74 0.03 46.3 3.50 18.6 166 13.75 5.48 257 21.58 2450 243 1 34 15 93 13.1 873 55 003 1293 21.00 5.93 109 8191 24.43 135 1296 969 217 066 13 94 114 9.42 67 0.02 387 5.12 8.10 130 7.16 5.35 168 18.29 1307 246 076 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 17.46 1.70 70 71.90 19.45 108 1129 6.46 223 0.46 50.05 0 97 125 8,77 40 0.02 19A 2.97 1.47 64 12.86 6.08 91 970 5.51 1 91 042 4744 2 98 123 8.32 43 0.02 161 2.43 1.50 66 6,47 4.34 99 9.97 5.88 1 77 045 4565 11 99 13A 8.17 43 0.02 20.3 2.83 133 82 1463 11 13 97 1029 5.92 1 97 0 44 4550 00 10.3 8.24 48 193 2.09 132 96 11.58 15 15 105 10.70 592 1 96 044 01 132 825 50 24.2 1.68 141 79 916 1247 109 02 11 0 8,48 48 21 1.50 1.42 77 4.19 579 105 03 100 8.29 48 19.7 1.74 1.82 71 3.06 433 106 04 14.0 8.45 48 17.9 1,78 2.05 fib 450 3.81 104 10.1❑ 746 1.91 056 05 115 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 5.64 935 91 2 07 126 8.41 51 292 2,97 165 85 500 834 113 11 03 589 220 050 9 08 13,4 8.53 54 264 209 103 648 1721 118 2 09 13.9 8.56 52 32.5 209 89 565 10.38 119 0 10 13.4 8.35 48 26.9 1.83 75 4,59 597 105 0 11 137 7.60 40 212 1.02 70 3.19 295 81 0 12 13.2 8.37 49 0.92 73 1 92 247 96 0 13 12.8 8.43 50 1.12 71 2.22 1.73 99 12 14 122 8.61 49 1.17 66 3.35 281 102 0 15 143 9.13 52 1.35 75 304 373 111 9 16 13.2 8.25 48 1.62 73 2.31 226 99 7 17 122 7,55 37 1 16 66 5.18 6.87 78 9 18 13.8 7.80 41 12 61 9A0 626 86 10 19 128 8.01 39 125 59 1042 9.23 64 5 20 12.9 8,78 45 1.31 67 7.09 5.59 100 1 Maximum 14.4 9 55 115 ❑05 1293 21.00 137.9 509 81.91 2443 891 7200 134.17 3 26 674 5236 17 Minimum 10.0 7.58 37 0.02 147 1.50 ❑.9 59 1 92 1.73 78 970 5.51 177 042 2700 0 Average 12.8 8.57 56 ❑.03 312 4.33 29.7 174 1202. 7.13 264 28A7 43.79 2.41 201 4666 6 4 Years 41 41 41 20 32 28 41 41 41 41 41 23 23 23 23 16 35 0 0 Note:Chm SOUTH TAHCE PUBLIC UTILITY DISTRICT INDIAN CREEK RESERVOIR DATA SUMMARY From 1980 To' 2020 Coliforms Fecal Air Total Fecal l E w1i Strep Temp SC4 Boron Fe Mn Year MPN MPN MPN C m 1L m IL u IL u IL Comments 80 124 81 181 82 154 83 97 1❑ 40 145 84 238 4 186 160 85 231 4 203 171 86 173 5 419 18.7 67 72 6 38 172 88 330 5 166 172 89 219 6 208 157 90 166 5 64 160 91 77 2 28 178 34.33 013 92 265 4 91 172 1808 Oil 93 519 7 259 149 8.32 006 94 477 13 54 115 7.48 0.06 95 584 4 26 124 539 003 96 186 2 189 167 2,59 0.04 97 75 7 119 15.1 3.43 0.02 98 154 3 149 8.2 275 0,02 99 50 6 30 15.5 4.74 0,02 00 7 c 2 3 192 550 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 4 180 254 0.03 222 28 05 16 2 24 16.2 1.99 0,02 307 36 06 49 3 5 13,9 158 0.02 773 82 07 6 2 2 201 3.42 0.02 614 35 08 15 2 3 17.5 468 0.02 1,237 50 09 230 2 2 14.8 466 ❑02 794 24 10 403 4 2 136 3.72 0,01 264 21 11 376 5 5 131 1.30 0.01 387 32 12 24 2 3 162 1.21 0.01 169 22 13 32 2 7 15.4 1.83 178 20 14 146 4 2 15.2 250 15 354 3 17.8 270 16 341 1 16.5 308 17 84 2 142 1.50 478 23 18 117 2 21 3 2.16 19 90 1 162 1.34 20 31 2 19.7 1.00 Maximum 584 13 419 24.3 3433 013 1,237 82 Minimum 6 1 2 82 1.00 0.01 169 20 Average 170 4 74 16.2 489 003 512 40 0 Years 38 38 32 41 30 22 15 15 Note:Chro INDIAN CREEK RESEREVOIR Total Phosphorus Chlorophyll a 020 — 50 015 40 I 1 J 30 cv 0 0 E E Q1 4 �—+ 20 ` ■ { 005 a- •JAY/ �`■4 r k-4 10 a� 000 0 97 98 99 00 01 02 03 04 06 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 00 ❑1 D2 03 34 05 0$ 07 08 09 10 11 12 13 14 15 16 17 16 19 20 f Seriesl Chlorophyll a Linear(Chlorophyll a) Secchi Depth NO3-N&NH3-N 0 10 10 - a w 15 — — 0 20 _ fi is 530 *.t 0 3 LL 35 2 - 40 1 •a l�■f 45 0 99 00 01 02 03 04 05 W 01 M 09 10 11 12 13 14 15 16 17 18 19 20 8081828384858667688990919293949596979899000102030405060708091011121314751617181920 —A�Secchi Depth Linear(Sec hi Depm) —■ -NO3-N -0—HH3-N INDIAN CREEK RESEREVOIR Chlorides Total Dissolved Solids 150 700 — 140 650 - 130 - _ - 600 120 550 110 *-# 5 100 00 ■. : 400 E 70$�; % - a 350 60 - - - E 300 50 250 40 200 30 150 20 100 i o 50 �' ► Yap• +'4..�.4 [I BD81828384858587 B8899091929394959B979899000102030405060708091011121314151617181920 0 808182833465668788 B9989192939495989798990801020304050$070E 091011121314151617151920 —�Chloides Linea r(Chlnno6S) —�TD5 Line-(TC5] PH 12 11 10 i■ 8 -fir ■• --Y a 7TCA-- 7 6 5 4 1111111112113114 85 8fi 1111111111911 91 92 93 9+95111 97118 99 111101112 03 W 11516 0708 M 11111 12,3141516171811,20 —A--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 2919 and the yearly averages since monitoring was initiated. Trends are plotted for parameters indicative of wastewater. Groundwater, surfacewater and soil quality data for 2919 are summarized below. Fourteen new monitoring wells were drilled in Alpine County in 2911. 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 2995 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 2995. 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. Su rfacewaters 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 2999, Chloride, Nitrite-N, Nitrate-N, ortho-Phosphate-P and Sulfate were analyzed using ion chromatography. Starting in 2999, 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 1 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 MPN1100mL. 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 MPNJ100mL. 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 -119,781661 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 -119.763196 Cello Ranch,along DV Rd Monitoring Well ACMW-07S 38.771882 -119,801658 Diamond Valley Ranch Monitoring Well ACMW-07❑ 38.771882 -119.801668 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-09❑ 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 ❑iamond Valley Weather Station Monitoring Welt ACMW-11 38.775595 -119.788216 Diamond Valley Ranch Monitoring Well ACMW-12 38.7776" -119.796388 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 119.794280 Diamond Valley Ranch Monitoring Well ACMW-16 38.773829 119.794173 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 119.777D72 Emigrant Trail near Chambers Lane Monitoring Well ACMW-22 38.829022 119.783738 Fredericksburg Lane near S7 Monitoring Well ACMW-23 38.826384 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 38.630470 119.769901 Road between Brooke's&Neddenriep(g?Neddenripp's Monitoring Well ACMW-26 38.940602 119.769677 Road between Brooke's&Neddenriep(g?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 -119.762679 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 38.815526 -119.781095 Arent Ranch house Domestic Well GW-11 38.766522 -119.808540 Diamond Valley School Domestic Well GW-14 38.75714D -119.818462 Sierra Pines Store Domestic Well GW-17 DV Ranch Domestic well Domestic Well C:UsamWantAppDalaLocalWic so%Window ffemporary IntBmet Files%Con ten[Outlook1BD22CZNG%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 •119.7998DD 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$oils Sites S-2 38.800316 -119,764305 Celia Ranch Sod S-3 38-801156 -119.7,90333 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 38.920691 -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 Trait Monitoring Well MW01-50 38.9131307 -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 -119.9662141 South side of Emergency Retention Basin,on Black Bart Acre Monitoring Well MW03-50 38.9129187 -119.9657562 South side of Emergency Retention Basin,on Black Bart Ave Monitoring Well MW03.5 38.9140361 -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 comer of Emergency Retention Basin,off Hank Monk Ave Monitoring Well MW06150 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 STPIJD Monitoring Well MW71 38.9238600 -119.9677190 250 fl south east of North Gate(to AI Tahoe Blvd) Monitoring Well MW12 38,9226200 -119,9683700 110 fl south of 8losolids Building Monitoring Well MW13 38.9206200 -119,9692200 125 fl south east of Pond#2 Monitoring Well Ditch Sites DO-01 38.765674 -119.780543 ❑iamond Ditch®beginning;H P R 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 -119.766263 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:UsefsWan$AppDaialLocal%Microsott WindowMTemporary Internet FileslCootmt Outlook%9D22CZNG%Lahonlan Report-Sample Sites Page 2 of 2 swwo7 t . II VN.a • 0 1 R• 11 r � sw•swwn . T! ti C111N SVW7Q sw-os�w-oe � _. ■ sw v j�• � Cvr.u^ a v�yV l f SW61 r. • � .T M•ol�oh❑.lcry. `� {YL► • • • • S1M1F'i7 r.. � ...�� . • N�Rrs • fY � sw•Q2 �S � , EXPLANATION • �' { Surface Water �. ' .. ICR 1 d O Ditch ota d Reservoir • * MONITOR WELL ICR-5 Irrigation-Recyled-23 Water Irrigation-Blended Recycled Water 0 1,500 ".11 e,000 Feet " SOUTH TAHOE PUBLIC UTILITY DISTRICT RECYCLED WATER PROGRAM MONITORING LOCATIONS ALPINE COUNTY,CA Qf� s Path:XAGOIB_Alpine CountMlpine Co Monitoring11 x17_15Aug 2014 mxd ALPINE COUNTY SOILS ry (ZED South Tahoe Public Utility District Alpine County Soil Sample Sites ti4 4 S-4 J N 1 �5-5 •, ae S-7 S-6 �4 R.vi RF S- r� ■ ii a ni l: �V a r G k M1 N+ R Y `)errryr. urr' S-3 S-2 :4 a= A 00000, J Y 0 0,25' 0.5 1 Miles site S2a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Celia Type: KT 2020 Inches: 06-12 EO TKN N0, P P205 K K20 Cu Mo SO4 CEC Ca Na Mg Exch CI Exch P Date pH mS1cm Sat% mQIn mglKg mglKg mg/Kg mg/Kg mg/Kg m41KU mg/Kg mg.Kg moan mglL mglL mglL SAR Na% mglL mglL 01129/20 8.16 4.23 68.3 2210 2.69 609 1,850 1,590 1,920 11.7 0.04 75 30.3 203 734 161 9.3 10.9 1,800 3.70 05/08/20 B.00 2.98 82.2 5700 27.2 1,240 2,840 2,100 2,530 9.8 0.25 104 15.9 258 276 158 3.3 3A 1,220 16.5 07/05/20 8.23 2.58 72A 3190 12.6 743 1,700 4,160 5,010 23.0 0.60 95 35.8 118 387 101 6.31 7.31 1,070 9A1 10/02/20 8.01 6.74 78.4 2150 4.88 909 2,080 2,490 3,000 31.6 0,15 100 34.9 155 955 208 11.80 13.60 2,400 13.3 Maximum 8.23 6.7 82.2 5700 27.20 1,240 2,840 4,160 5.010 31.6 0.60 104 35.8 258 955 208 11.8 13-6 2,400 16.5 Minimum 8,00 2.58 68.3 2150 2.69 743 1,700 1,590 1,920 9.8 0.04 75 15.9 118 276 101.0 3.28 3.38 1,070 3.7 Average 8.10 4.13 75.3 3313 11.84 925 2,118 2,585 3,115 19.0 0.26 94 29.2 184 588 160 7.68 8.80 1,623 10.7 #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: 2020 EC TKN NO3 P P,OS K K,0 Cu Mo sO, CEC Ca Na Mg Exch CI Exch P Year pH m5fcm Sat% mg/Kg mg/Kg_ mglKg mglKg mgXg mg/Kg mg/Kg m09 mQXg merlom mglL mg1L mglL SAR Na% mgIL mglL 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 0A 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 57 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 1.6 626 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 B,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 B.00 3.23 53.3 2.217 3.4 851 1,948 13,771 16,444 14 0.7 4B 36 164 356 100 5.41 6.3 740 54 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 4A7 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 63 2001 B-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.B 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 65 2003 B25 0,93 61.9 1,965 4.1 883 2,020 13,250 15,675 22 1.0 33 31 53 121 26 337 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 34 324 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 91 240 107 196 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 77B 1.780 2,735 3,250 9 0.1 65 30 80 477 88 B-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 6B.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 4A 635 1,455 2,593 3,100 15 0.2 146 34 246 627 186 7.38 8.6 786 5A 2015 7.86 8Al 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 1,847 112 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 la4 588 160 7-68 8.80 1.623 10-7 Maximum 8,27 8.41 76.7 5,433 25.0 948 2,170 17,357 20,828 29 2.0 331.25 38 367 1344 414 12.00 13.7 2,329 17-7 Minimum 6,95 0.93 53.3 1,745 0.7 324 742 1,969 2,375 7 0.1 13 25 51 120 26 2,52 2A 177 4.3 Average 7.94 3.42 64.2 2,B63 4-1 767 1.757 9,540 11,44-4 16 0.5 96 32 154 400 121 5,84 6.6 881 8.6 #Tests 40 40 40 40 40 40 40 36 36 40 40 38 40 38 38 37 37 37 35 36 Site: S2a Ranch: Celio pH Salinity 10 9 1 E 5 V E 4 3 2 1 a T�2T T�orynn98R 29 RE2REa28 a 21888S0000000 , ==="- R� ��9vERER222'' �pH -Linear(pH) t Salinity Linear[Salinity] Cation Exchange Capacity Sodium Adsorption Ratio 15 10 a 5 a�assss'so'N R a��dmmm��amc�oo��`as�nory��n ae ---@--CEC -Unear(CEC) - SAR Linear(SAR) Site s3a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Hall Type: SIVIB 2020 Inches: 06-12 EC TKN NO, P Pz05 K K2O Cu Mo 504 CEC Ca Na Mg Exch CI Exch P Date pH m51cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mglKg mg/Kg mg/Kg mg.Kg mel100g mglL mgIL mg1L 5AR Na% mg1L mg1L 01/29120 5.75 0.305 34.0 11150 1.88 874 2,000 1,040 1,250 10.0 0.03 11 21A 16.9 24.3 5-62 1.31 a 1.00 325 8.57 05/08120 5.40 0.512 36.5 1,720 1.27 801 1,833 1,110 1,340 7.8 0.18 17 11.2 22.1 38.3 5.77 1.880 1.44 525 10.5 07/05120 6.03 0.403 37.5 1,260 3.99 665 1,520 1,870 2,250 17.2 0.28 12 21.2 30.4 47.7 11.9 1.86 1.41 475 8.38 10102r20 6.35 0.445 41.3 1,880 0.629 854 1,950 1,250 1,510 27.2 0.25 18 19.8 20.8 42.4 9.93 1.91 1.49 325 7.92 Maximum 6.35 0.512 41.3 1,880 3.99 874 2,000 1,870 2,250 27.2 0.28 17 21.4 30.4 47.7 11.9 1.91 1.49 525 10.5 Minimum 5.40 0.305 34.0 1.150 0.629 665 1,520 1,040 1,250 7.8 0.03 11 11.2 16-9 24.3 5.62 1.31 < 1.00 325 7.92 Average 5.88 0.416 37.3 1,503 1.94 799 1,826 1,318 1,588 15.6 0.19 14 18.4 22.6 38.2 8.3 134 1.34 413 8.84 #Tests 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Site 53a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Hall Type: SMB From: 1981 Inches: 06-12 To: 2020 EC TKN NO3 P P,O5 K K,C Cu Mo SOa CEC Ca Na Mg Exch CI Exch P Year pH mSlcm Sat% mg/Kg mglKg mg/Kg mgXg mg/Kg mgXg mg/Kg mg/Kg mglKg me1100g mg/L mglL mg/L SAR Na% mglL mglL 1981 5.68 1.44 31.4 1,411 0.6 420 962 5,716 6,659 40 0.7 24 23 1982 5.81 0.96 31.3 1,225 3.0 720 1,649 15,687 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 3 121 0.5 54 1985 5.86 0.80 36.2 1,479 0.6 774 1,772 19,036 22,643 18 0.6 26 1B 60 54 20 1.59 1.0 103 105 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 1B 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 1A6 1.8 68 15.4 1998 6.10 0.45 35.9 1,292 1.6 1,010 2,310 18 c 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 c 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 2A 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 1B 29 30 10 123 a 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 11A 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 a 1.0 23 214 2006 5.75 0.33 33.7 8B6 2.2 1,008 2,307 12,893 15,467 35 0.7 16 18 27 21 8 0.88 a 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 a 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 a 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 a 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 a 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 34A 1,557 0.8 654 1,500 1.040 1,267 15 0.2 42 19 43 14 8 0,65 a 1.0 15 10.3 2013 5.74 0.26 34.1 1,132 0A 607 1,390 1.353 1,625 16 0.1 22 18 22 19 5 0.92 a 1.0 16 5.7 2014 5,97 0.3B 32.4 997 0.5 691 1,585 150B 1,B25 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 1.69E 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 02 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 1B.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,B26 1,31B 1,58B 15.6 0.2 14 18.4 22.6 38.2 8.3 1,74 1.3 413 8,84 Maximum 6,46 3.47 44A 2,073 6,0 1,095 2,50B 19,036 22,643 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 B15 1,040 1,267 B 0.1 4 15 14 14 3 0.65 0.5 14 5.6 Average 5.86 0.76 36.2 1,480 1.6 770 1,763 10,668 12,B00 20 0.6 26 19 51 62 19 1.7B 1.7 134 14.6 #Tests 40 40 40 40 40 40 40 36 36 40 40 38 40 38 37 37 37 37 34 36 Site: S3a Ranch: Hall pH Salinity 5 4 E 3 - V N E 2 - - - r r w R R R R R R R E R N n N n m a a _ m W m p a m m p N R n N ry n gg S S o RoRtiR R n pH Llnear(pH) -----Salinity Linear(Salinity) Cation Exchange Capacity Sodium Adsorption Ratio 15 10 Q CEC linear(CEC) +SAR Linear(SAR) Site S4a S4a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Gansber Gansberg Type: DI DI 2020 Inches: 06-12 06-12 EC TKN NO, P P'O' K KO Cu Mo so, CEC Ca Na Mg Exch Cl Exch P Date pH m&cm Sat% mg1Kg mg/ffg mgn mglKg mglKg mg/Kg mglKg mg1Kg mg.Kg rme+idog mglL mglL mglL SAR Na%_m21L mglL 01/29/20 7A2 2.460 30.6 1,020 14.8 746 1,710 4,520 5,450 11.7 0.03 29 19.7 53.0 125 303 3.38 3.51 500 78.2 05108R0 6kS 0.582 39.4 1,560 9.28 373 850 2,730 3,290 8.3 0.07 7 10.9 34.9 67.3 31.7 1.98 1.59 450 7.81 07115120 5.90 0.787 51.6 5,450 17.8 552 1,260 7,670 9,240 29.6 0.37 8 26.8 41.0 32.2 9.68 1.17 c 1.00 525 197 10102f20 624 0.645 40A 3,250 8.85 436 1,000 5,700 6,870 29.1 0.14 13 19A 38.5 48.0 12.1 1.73 1.23 225 45.5 Maximum 7.42 2.460 51.6 5,450 17.80 746 1,710 7,670 9,240 29.6 0.37 29 26.8 53.❑ 125.0 31.7 3.38 3.51 525 197.0 Minimum 5.90 0.582 30.6 1,020 6.85 373 850 2,730 3,290 8.3 0.03 7 10.9 34.9 32.2 9.68 1.17 r 1.00 225 7.81 Average 6.56 1.119 42.0 2820 12.633 527 1,205 5,155 6,213 19.7 0.15 14 19.2 41.9 68.1 21.05 2.07 1A3 425 82.1 #Tests 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Site Sila SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Gansberg Type: DI From: 1981 Inches: 06-12 To: 2020 EC TKN NO3 P PzOS K K2O Cu Mo SOa CEC Ca Na Mg Exch CI Exch P Year pH mSlcm Sat% mg1Kg mg/Kg mglKg mg/Kg mg/Kg mgLKg mglKq!_-V9 mg1Kg me1100g mglL mglL mglL 5AR Na% mglL mglL 1981 5.80 0,92 47.0 1,533 1.2 206 472 20,757 24,908 28 1A 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 CA 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 38A 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 CA 20 18 115 104 25 2.35 2.2 317 9.9 1989 6.35 326 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 6.69 129 37.5 1.742 12 392 899 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 2A 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 1A 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 &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 7A 470 1,078 14 1.0 11 18 75 91 17 2.39 2A 82 14.6 1997 6.51 0.51 37.1 1,434 5.1 398 913 18 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 a 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 0A3 41.7 1,711 B.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 9A 2008 6,34 0.51 34A 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 3B.3 2,058 6.2 457 1,048 6,4B7 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 58 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 40A 1,920 7A 278 638 6,827 8,175 23 0.2 22 16 43 80 8 2.91 2.9 46 6A 2014 6.46 0.60 373 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 0.94 403 2,793 9.8 352 805 5,266 6,325 25 0.1 23 20 42 80 17 2.60 24 84 13.7 2016 6.68 1.36 410 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 22 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 1205 5,155 6,213 20 0.15 14 19 42 68 21 2.07 1.B 425 82.1 Maximum 6.94 326 47.0 3,410 12.6 795 1,820 24,455 29,346 69 2.0 55 22 219 205 48 4.47 5.0 699 821 Minimum 5,80 0,36 33.5 1,235 0.5 206 472 2,178 2,624 14 0.0 3 13 24 23 6 1.02 0.4 23 5.8 Average 6.47 0.87 38.8 1,855 4.8 452 1,036 15,452 18,542 28 0.6 16 18 55 76 13 2.45 2.3 150 13.5 #Tests 40 40 40 40 40 40 40 36 36 40 40 38 40 38 38 37 37 36 34 35 Site: S4a Ranch: Gansberg pH Salinity 5 4 3 N 1 aWWoa o 0 0 0 ��Ww�WWa�W��moo eeee°ee —*--pH Linear(pH) t Salinity Linear(Salinity) Cation Exchange Capacity Sodium Adsorption Ratio 15 10 a N 5 -----------&&-- 8888888888 0 - -- - -$w� mm�_wRRRt3R��RRR��Nnn� --9---GEC Unear(CEC) t SAR Linear(SAR) Site 55a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Gansberg Type: HRI3 2020 Inches: 06-12 EC TKN NO, P P20, K K2O Cu Mo 504 CEC Ca Na Mg Exch Cl Exch P Date pH mSlcm Sat% mg/Kg mglKg mglK9 mg/Kg mgn_ mg/Kg mgn mg1Kg mg.Kg mwipag_ mglL mg/L mWL 5AR Na% mglL mglL 01/29/20 6,23 0.379 33.6 1,490 4.92 873 1,99B 1,510 1,820 92 0.05 2 17.2 25.4 38.9 6,53 1.78 1.30 400 4.94 05/08/20 5,96 0,193 36.4 11630 3,05 812 1,858 1,550 1,870 8.8 0.50 2 6.89 29.4 27.6 7,02 1.19 = 1.00 625 490 07/05120 6.00 0.259 41.0 2,050 4.70 671 1,535 4,430 5,340 21A 0.73 4 17.0 39.7 38.2 2.57 1,59 1.03 475 7.B3 10/02/20 5.71 0.317 41.7 2,140 2.36 365 840 3,970 4,780 27,2 0.90 4 15.8 22.4 33.4 5,05 1,66 1,13 325 9.83 Maximum 6.23 0,379 41.7 2,140 4.92 873 1,998 4,430 5,340 27.2 0.90 4 17.2 39.7 38.9 7,02 1.78 1.30 625 9,83 Minimum 5.71 0,193 33.6 1,490 2.36 365 840 1510 1,820 B.8 0.05 2 6.7 22.4 27.6 2.57 1,19 < 1.00 325 4.90 Average 5.98 0.2B7 38.2 1,828 3.76 6B0 1,558 2,865 3,453 16.7 0,55 3 142 292 34.5 5.29 1.56 1,12 456 6.88 *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: HR6 From. 1981 Inches: 06-12 To: 2020 EC TKN NO3 P P,Q, K K2O Cu Mo 504 GEC Ca Na Mg Exch CI Exch P Year pH mSlcm Sat% mglKg mg/Kg mglKg mgIKg mglKg mg1Kg mg/Kg mglKg mg/Kg me1100g mg1L_ _mg!L m211- SAR Na% m2�! mg1L 1981 5,80 1.08 31.2 997 1 A 233 534 19,729 23,675 21 10.9 19 12 1982 6,05 0,60 29.5 1,011 2A 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 29A 1,137 0.8 475 1.088 21,667 26,000 24 0.6 13 12 31 93 5 4.34 4.9 74 76 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 3A 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 96 1993 6.08 0.37 29,2 1,148 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 67 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 c 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 72 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 63 2006 6.16 0,24 35.1 1,095 3.1 818 1,875 16,070 19,300 37 i.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 66 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 65 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 31 101 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 88 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 64 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 Maximum 6,34 1.08 382 1,913 10.1 930 2,130 24,727 29,672 37 10.9 32 18 47 93 10 4,34 4.9 456 163 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 1,235 4.5 563 1,290 13,961 16,755 21 1.0 10 14 25 44 4 2.23 2.0 57 8.0 #Tests 40 40 40 40 40 40 40 36 35 40 40 38 40 38 38 37 37 37 35 36 Site: S5a Ranch : Gansberg pH Salinity 5 4 E 3 V E 2 1 ---------------- --.*----pH Linear(pH) T Salinity Linear(Salinity) Cation Exchange Capacity Sodium Adsorption Ratio 15 10 N 5 a � �ssss � �gggaogoson�� u ---s"_t---ssgg"aryo �RRRR2�RRRRt3N —.*----GEC Linear(CEC) - SAR Linear(SAR) Site S6a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Neddenriep Type: DWB 2020 Inches: 06-12 EC TKN NO, P P205 K KO Cu Mo SO4 GEC Ca Na Mg Exch CI Exch P Date PH mSlcm Sat% mg/Kg mg/Kg m l mg/Kg mq/Kg mgLg mgXg m9/K9 mgxg m9-K9 meilwg m L m 1L m IL SAR Na% m IL m 1L 01/29/20 7.32 0.522 39.7 1,730 13.3 620 1,419 2,660 3,200 14.2 0.03 2 16.9 38.1 39A 7,73 1.52 r 1.00 425 9.75 05/08/20 6A4 0.632 41.2 2,150 14.8 497 1,140 2,500 3,010 112 0.09 10 4.35 33.1 41.6 6.83 1.72 122 500 15.5 07/05/20 6.73 0.528 38.9 2,060 12.1 554 1,270 6,000 7,230 30.4 0,21 12 22.2 30.4 55.6 5.82 2.42 220 550 13.3 10/02/20 6.63 0.571 45.2 2,760 9,88 477 1,090 3,810 4,590 30.4 0,19 11 18.8 51.3 34.8 7.00 121 < 1.00 250 12A Maximum 7.32 0.632 45.2 2,760 14.8 620 1,419 6,000 7,230 30.4 0.21 12 22.2 51.3 55.6 7.73 2.42 2.20 550 15.5 Minimum 6.44 0.522 38.9 1,730 9.880 477 1,090 2,500 3,010 11.2 0,03 2 4.4 30A 34.8 5.82 1,21 < 1.00 250 9.75 Average 6,78 0.563 41.250 2175 12.5 537 1,230 3.743 4,508 21.6 0.13 9 15.6 38.2 42.9 6.85 1.72 1.36 431 12.7 #Tests 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 site 36a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Neddenriep Type: DWB From: 1981 Inches: 06-12 To: 2020 EC TKN NO3 P P,OS K Kz0 Cu Mo sod GEC Ca Na Mg Exch CI Exch P Year pH mSlcm Sat% mg/Kg mg/Kg mglKg mg/Kg Tln mgIKq mg/Kg mg/Kg mg/Kg me1100g mg1L _m2I1- mglL SAR Na% mglL mg4- 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 ❑.69 45.1 1,786 0.9 702 1,608 17,395 20,874 28 02 32 15 30 101 123 1984 5,94 ❑.30 43.6 1,797 0.7 701 1,605 19,055 22,866 28 0A 15 17 10 43 2 3.30 3.5 35 1985 6,04 ❑.33 44.❑ 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 ❑.31 42.7 1,780 1.2 611 1,399 18,908 22,690 28 0.3 1❑ 15 16 43 2 3.27 3.6 38 33.8 1987 6,13 ❑.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 6,18 122 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 02 17 14 26 123 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 26.8 1991 5.97 ❑.69 37.9 1,534 1.6 680 1,557 19,833 23,800 22 0.2 12 17 23 111 5 5,46 6.3 132 564 1992 6,25 ❑.80 36.9 1,443 1A 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 36A 1,369 2.3 603 1,382 19,833 23,800 17 0.2 10 18 19 100 5 5.49 6A 90 372 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 52 91 27Z 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 ❑.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 ❑.27 413 1,342 32 620 1.420 38 1.2 8 11 10 35 2 3.10 3.2 328 1999 6.38 ❑.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 ❑.26 44.1 1,416 5.3 723 1.655 19,550 23,475 44 a 1.0 8 18 16 27 6 1.69 1A 37.0 2001 6,38 ❑A2 42.1 1,358 3.4 690 1.582 17,125 20,550 42 2.3 4 17 17 60 4 3A6 3.6 65 36.3 2002 6.58 0.50 442 1,586 3.1 503 1,837 18,975 22,775 37 1.5 4 19 20 76 4 4.01 4.3 63 408 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 55 254 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 46 262 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 624 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 ❑.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 ❑.92 44.2 1,983 12.0 690 1,580 3,092 3,725 24 02 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 60 193 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 ❑.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 1A 431 12.7 Maximum 6.90 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 56A Minimum 4.96 0,26 29.3 1,157 0.5 335 766 2,524 3,025 14 0.1 4 11 10 27 2 1.22 1.2 24 12.7 Average 624 0-63 42.0 1,739 6.6 667 1,528 13,163 15,796 28 0.5 17 17 29 76 7 3.84 4.2 114 28.5 A Tests 40 40 40 40 40 40 40 36 36 40 40 38 40 38 38 37 37 37 35 35 Site: S16a Ranch: Neddenriep pH Salinity 5 4 E 3 _V U) E z 1 - - � ms� a�WWaa sryas"ssss�nn��nssn�sg � T---ass"s000as000�nm��m —*--pH Linear(pH) t Salinity Linear(Salinity) Cation Exchange Capacity Sodium Adsorption Ratio 15 10 I N ��:�m��m�� °rnnn�Nao�sooa�n.��m��Wo � m�m�mmmmmmmmmamm o��MaN� �� RnRRRNRRRRRRRRRAR r � �,�8888888888NRR�Rs� - CEC Linear[CEC] - SAR Linear(SAR) site 57a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Bruns Type: Jac 2020 inches: 06-12 EC TKN NO, P P2O$ K K2O Cu M❑ 50, CEC Ca Na Mg Exch CI Exch P Date pH m51cm Sat% mglKg mglKq mglKg mg/Kg mg)Kg mglKg mglKg mglKg mg.q me11OOg mglL mglL mglL SAR Na% mglL ML 01/29/20 5.92 0.200 39.1 1,930 3.28 871 1,990 2,980 3,590 14.6 0.03 3 15.0 12.7 9.79 3.11 0.64 c 1.00 325 9.89 05/08/20 5.84 0258 38.9 2,040 6.19 683 1,560 2,770 3,340 10.7 0.14 4 16.2 16.6 12.10 3.85 0.70 a 1.00 425 14.1 07/05/20 5.97 0.117 39.3 1,710 1.60 434 990 6.570 7,920 32.9 0.44 4 14.7 25.1 16.4 25.1 0.55 < 1.00 715 6.19 10/02/20 5.78 0.177 45.3 2,960 0.914 726 1,660 3,540 4,270 31.7 0.65 5 16.9 24.0 8.43 3.72 0.42 c 1.00 325 30.5 Maximum 5.97 0.258 45.3 2,960 6.2 871 1,990 6.570 7,920 32.9 0.65 5 16.9 25.1 16-40 25.10 0.70 < 1.00 715 30.5 Minimum 5.78 0.117 38.9 1,710 O.9 434 990 2,770 3,340 10.7 0.03 3 14.7 12.7 BA3 3.11 0.42 a 1.00 325 8.19 Average 5.88 0.188 40.7 2160 3.0 679 1,550 3,965 4,780 22.5 0.32 4 15.7 19.6 11.68 8.95 0.58 < 1.00 448 15.17 *Tests 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Site 57a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Bruns Type. Jac From: 1981 Inches: 06-12 To: 2020 EC TKN NO3 P P2O5 K K2O Cu Mo 504 CEC Ca Na Mg Exch CI Exch P Year pH m51rm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg m2�Kg me11009 mg1L mg1L mg/L SAR Na% mg1L mmqIL 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 1,855 0.9 574 1,314 21,964 26,357 31 0.7 6 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 0A 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 s 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 a 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 a 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 OA5 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 0.8 6 14 26 10 6 OA7 < 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 37A 1,607 1A 683 1,563 23,083 27,700 14 0.3 7 15 20 9 5 OA6 a 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 OZ4 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 32A 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 a 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 c 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 c 1.0 6.3 10.9 2005 6,25 0,16 43A 1,800 2.8 1,023 2,343 19,900 23,875 46 1.3 3 18 17 6 3 0.36 c 1.0 3.4 8A 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 33 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 c 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 r 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 5.82 025 39.8 1.705 7.5 548 1,255 6,217 7,450 31 0.1 38 16 23 8 5 0.39 r 1.0 5.2 4.5 2012 5,87 0.25 40A 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 1,633 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 a 1.0 4.8 7,2 2015 5.55 0.45 413 2,758 113 556 1,273 4,305 5,150 29 0.2 20 17 42 12 24 0.37 < 1.0 3.8 10.4 2016 5.76 026 42.1 2,613 6.8 473 1,083 6,355 7,625 24 0.2 13 16 25 7 6 0.39 a 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 5.80 027 37.9 2,230 6.18 511 1,170 4,240 5,110 26 OX4 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 Maximum 6.46 0.67 44.1 3,063 32.4 1,023 2,343 23,083 27,700 305 2.3 51 18 42 19 24 1.29 11 447.5 15.2 Minimum 5.55 0.13 35.4 1,384 0.3 301 689 3,641 4,375 14 0.0 1 11 12 6 3 0.32 0.1 3.3 3,5 Average 6.00 024 40.2 1,906 4.7 651 1,489 14,532 17,439 37 0.6 12 15 23 10 6 0.53 1.0 36-7 8.2 #Tests 40 40 40 40 40 40 40 36 36 40 40 38 40 38 38 37 37 37 35 36 Site: S7a Ranch : Bruns pH Salinity 5 4 E 3 V N E 2 I 1 N N[V N N N N N N N N N N N N N � - --- N ---��NNRRRRRRR�aRR9�RR --.*--pH Linear(pH) --.*----Salinity Linear(Salinity) Cation Exchange Capacity Sodium Adsorption Ratio 15 1p Q N 5 --e--CEC Linear(CEC) I SAR Linear(SAR) ALPINE COUNTY MONITORING WELLS Site: ACMW-01AW SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO,-N NO3-N Total N TD5 Date ft Level C pH mg1L mg1L NTU mg]L mgfL mglL mg/L mg/L mg1L mg/L 1/9/2020 6.9 548&23 10A 6.70 33.0 0.024 0.1 < 0.020 < 0.010 0-137 0.145 72 4/22/2020 9.14 5483.99 10.0 6.61 39.8 0.023 a 0.1 < 0.020 < 0.010 0-220 0.22 69 7/15/2020 6.69 5486.44 11.5 6.50 36.3 0.026 0.18 < 0.020 < 0.010 0.634 0.81 59 10/14/2020 8.15 5484.98 14.2 6.43 40.3 0.022 a 0.1 < 0.020 < 0.010 0.134 0.13 74 Maximum 9.14 5486-4 14.2 6-70 40.3 0-026 a 0-180 < 0.020 < 0-010 0.634 0.81 74 Minimum &69 5484-0 10.0 6.43 33.0 0-022 a 0.100 < 0.020 < 0,010 0.134 0.130 59 Average 7-72 5485-4 11.5 6-56 37-4 0-024 < 0-120 < 0-020 < 0-010 0.281 0.326 69 #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 2020 Total Fecal EC Chloride COD SO4 Color Coli E-coli Strep Date umhos mglL mg!L mg/L Units MPN MPN MPN Comments 119l2020 72.0 1-56 1.26 1 < 1 4/22/2020 86.5 1.62 1.36 < 1 < 1 7/15/2020 91.1 2.47 1.63 1 < 1 10/1412020 93A 1.62 2.65 3.1 < 1 Maximum 93-4 2-47 2-65 3-1 < 1 Minimum 72.0 1.56 1.26 < 1 < 1 Average 85.8 1.82 1.73 1.5 < 1 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-01AW SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER DUALITY DATA From: 1989 To: 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO,-N NO,-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mglL 89 9.0 5480.7 10.4 &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 W1.6 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 6.82 460 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 a 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 5482A 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 0400 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❑ 63 10.75 0.030 0.065 < 0.020 1.989 2041. 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 a 0.010 0.177 0.275 13 6-3 5486.9 10.7 8.75 46.0 0.042 0.102 0.028 < 0.010 0.108 0.176 14 7.5 5485.E 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 A 6.57 35.4 0.032 < 0.055 a 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 OAK 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 < 0.01 0 0.281 0.326 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 31.7 26 1.07 0.022 0.054 0.020 < 0.009 0.108 0.152 Average 6.8 5483.2 10.9 6.66 43.2 46 13.49 0.046 0.107 0.025 0.017 0.546 0.657 #Tests 32 32 32 32 32 22 23 32 32 23 32 32 32 Site: ACMW-01AW SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2020 Total Fecal Fecal TDS EC Chloride COO SO4 Color Coli E. coil Strep Year mg1L umhos mg1L mglL mglL 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 a 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 10 < 5 4.42 10 2 r 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 a 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 3A 6 2.74 1.5 < 1.1 10 96 132 T3 < 5 2.61 1.1 < 1A 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 a 1.1 14 75 83 1.4 3.78 1.9 < 1 A 15 70 79 1.4 4.73 2A < 1.0 16 95 118 1.6 5.30 9.6 < 1.0 17 78 90 2.0 3.61 1.0 a 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 Maximum 109 162 7.6 8 6.95 60 12.3 2.0 r 2 Minimum 69 70 1.1 2 1.73 < 5 1.0 < 1.0 < 2 Average 85 105 3.1 5 3.50 11 2.5 1.3 r 2 #Tests 32 32 32 23 32 17 32 32 1 Site AC MW-01 AW Nitrate-Nitrogen and Water Level Chlorides g 54ss 50 4 5490 40 3 5485 m J m 30 � J J E m m 2 — 5460 8 20 1 5475 10 _ W V 0 547a 0 89 9C 91 92 93 94 95 96 97 98 99 00 U1 02 03 34 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 59 90 91 92 93 yc 95 96 97 96 99 00 01 02 03 04 05 DF. 07 05 09 1C 11 12 13 14 16 16 17 18 19 20 --4—Nitrata Water Level tChIoride Total Dissolved Solids [TES] Total Phosphorus 500 0.50 400 0.40 — — 300 — 0.30 J J W � E 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 Of 06 09 A 11 12 13 14 15 16 17 18 19 20 89 90 91 92 93 94 95 96 97 99 99 00 01 02 03 C4 05 08 07 06 09 1C 11 12 13 14 15 16 17 '9 19 20 ---0—TD5 Linear JDS] —Total P Linear(Total P) Annual Metal Report ACM W-01AW Main Dam Ca K Mg N8 Ag Al As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb 5h 5e TI V Zn m g/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 a10 2400 e4 40 a0.1 a10 a20 820 e0.2 90 a5 e50 <1 el a10 11/28/1989 9.4 1 4.1 6.1 <10 1300 a10 110 cl a10 <50 1700 <1 120 a10 a5 <50 8/1/1990 12 1.5 3.7 7.1 <10 1100 e4 84 r0.1 <10 <20 860 a0.2 100 1 <1 <10 8/21/1991 9 1 3.1 5.2 a10 600 a4 61 <0.1 <10 a20 550 a0.2 64 2 <1 e10 7/21/1992 14 1 4 7.2 a10 76 a4 55 <0.1 <10 a20 72 a0.2 a10 al <1 e10 7/12/1994 11 0.9 3.2 5.4 <10 660 a2 45 0.1 e10 <20 410 a0.2 7.1 <1 el 7.2 8/15/1995 15 1.1 4.4 6.8 <10 310 al 65 a0.1 <10 <10 160 e0.2 c5 al rl e5 6/19/1996 18 1.2 5.3 6.9 <10 120 cl 76 e0.1 e10 <10 a30 r0.2 <5 el el a5 6/16/1997 14 1.4 4.3 7.2 <10 250 e2 56 a0.5 <10 <25 200 <0.5 <10 c5 <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 r2.5 e5 a25 6/20/1999 5.71 0.548 1.76 2.99 <10 530 <2 <100 <1 0.28 a10 <20 115 <0.2 <20 <5 <2.5 e3 <1 al <10 7/18/2000 7.4 0.928 2.84 5.38 <10 <2 <100 a20 367 <20 <2.5 <10 6/19/2001 6.65 0.760 2.01 4.25 a10 <2 <100 a20 548 e20 <2.5 e10 6/18/2002 6.61 0.878 2.13 4.32 <10 400 [2 35 c0.2 <0.2 <1 a20 372 0.02 a20 al <2.5 el [2 e0.2 <10 6/17/2003 7.18 0.938 2.42 4.84 <10 300 a2 35.7 <0.2 <0.2 <1 e20 242 t0.01 <20 [1 <2.5 <1 <2 c0.2 a10 5/18/2004 7.78 0.866 2.46 4.83 e10 440 c2 a100 <0.2 [0.2 al <20 339 0.01 <20 [1 a2.5 <1 a2 <0.2 <10 6/14/2005 8.73 0.793 2.72 4.64 <10 [2 <100 <20 507 a20 <2.5 <10 6/1/2006 7.84 1.11 2.76 4.91 <10 1200 3.42 a2 <2 e2 a20 1890 r0.2 23.8 [2 2 e2.5 <2 a10 a1 2 169 6/19/2007 8.90 0.894 2.53 5.11 <10 420 r2 37 <l <0.5 c1 <20 25.3 <0.2 e20 e2 <5 c2.5 al ¢5 <l a3 e10 6/4/2008 9.84 1.24 3.3 6.13 a10 4300 2.92 68 [1 e0.5 c1 a20 141 <0.2 26.8 e2 <5 c2.5 a1 <5 [1 e3 <10 6/17/2009 8.15 0.932 2.46 5.68 <10 830 e2 41 a1 a0.5 <l <20 416 <0.2 33.9 a2 <5 <2.5 el [5 cl a3 11.3 6/9/2010 14.0 1.10 4.2 6.80 <0.5 88 [1 63 al a0.5 <1 <2 56 a0.2 <2 r2 <5 [0.5 el a5 cl r3 <20 6/14/2011 8.41 1.01 2.86 5.58 <0.5 2430 al 47.9 al <0.5 [1 <2 1100 <0.2 8.11 [2 e5 e0.5 cl <5 <l <3 <20 6/14/2012 854 6.02 87.5 rl <0.5 8.42 <0.2 5.47 13.4 <1 a5 rl 13.3 6/19/2013 9.77 1.05 2.7 5.53 6/17/2014 7.79 al 2.48 5.05 <0.5 151 1.46 36.5 <1 <0.5 [1 <2 405 a0.2 [2 <2 <5 <0.5 [1 c5 <1 s3 Q0 7/15/2015 8.13 <l 2.51 4.56 a0.5 218 al 40.1 al a0.5 al <10 179 e0.2 a2 c2 <5 <0.5 [1 <5 [1 c3 <20 7/12/2016 7.63 1.03 2.47 4.26 <0.5 1960 c1 46.9 a1 <0.5 1.03 a2 1610 c0.2 16.7 a2 <5 e0.5 [1 e5 [1 c3 <20 7/19/2017 8.78 1.03 2.6 4.58 <0.5 676 <1 44.4 <l a0.5 el c2 647 <0.2 3.29 [2 [5 <0.5 [1 a5 al a3 <20 8/6/2018 8.27 el 2.35 4.68 <0.5 399 <l 41.6 al c0.5 c1 Q 235 <O.Z a2 e2 <5 <0.5 al <5 [1 [3 e20 8/13/2019 5.87 <1.0 1.72 3.97 <0.5 1580 [1 32.2 cl <0.5 <l [2 909 <0.2 3.88 <2 <5 <0.5 el a5 c1 <3 a20 7/15/2020 8.39 al 2.41 4.74 <0.5 418 <l 41.2 e1 <0.5 <1 <2 187 <0.2 a2 [2 a5 e0.5 <1 a5 rl <3 <20 Site: AGMW-01 BE SOUTH TAHOE PUBLIC UTILITY DISTRICT LPINE COUNTY GROUNDWATER QUALITY DAT 2020 Depth Water Temp Alk Hard Turb Total P TKN NH,-N NO,N NO3-N Total N TDS Date ft Level C pH m IL m L NTU m L m IL m L m9jL m 1L m 1L m 1L 1/9/2020 7.71 5495.84 8.1 6.64 36.0 0.031 ¢ 0.100 < 0.020 < 0.010 0.167 0.181 82 4/22/2020 13.02 5490.53 9.4 6.41 46.4 0.034 < 0.10 < 0.020 < ❑.010 0.183 0.18 84 7/15/2020 9.28 549427 10.1 6.40 58.2 0.034 027 < 0.020 < 0.010 0.091 0.36 81 10/14/2020 14.21 5489.34 11.6 6.19 55.3 0.029 < 0.10 ¢ 0.020 ¢ 0.010 0.147 0.15 88 Maximum 1421 5495.8 11.6 6.64 58.2 0.034 0.270 < 0.020 ¢ 0.010 0.183 0.36 88 Minimum 7.71 5489.3 8.1 6.19 36.0 0.029 < 0.100 < 0.020 < 0.010 0.091 0.15 81 Average 11.06 5492.5 9.8 6.41 49.0 0.032 < 0.143 ¢ 0.020 < 0.010 0.147 0.218 B4 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-01 BE SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Total Feral EC Chloride COD SO4 Color Cali E. coli Strep Date umhos m 1L m IL m 1L Units MPN MPN MPN Comments 11912020 78.0 1.35 1.85 < 1 < 1 4/22/2020 96.7 1.59 125 C 1 C 1 7/15/2020 119 1.22 0.869 < 1 < 1 10114r2020 116 1.30 1.36 < 1 < 1 Maximum 119 1.59 2.25 < 1 < 1 Minimum 78 1.22 0.87 < 1 < 1 Average 102 1.37 1.58 < 1 < 1 #Tests 4 4 0 4 ❑ 4 4 ❑ Site: ACMW-01 BE SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER DUALITY DATA From: 1989 To: 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NON NO,-N Total N Year It Level C pH mg/L mg/L NTU mg1L mg/L mg/L mg1L mg/L mglL 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 10A 5491.0 9.1 7.02 51.0 40 4.37 0.025 0.085 0.025 < 0.010 0.157 0.252 91 1&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 ❑A28 ❑.01❑ 0.163 0.287 83 10.8 5490.3 10.2 6.87 63.0 67 7.75 0.031 0.069 0A21 0.010 0.728 0.807 94 11.1 5490.0 10.4 6.62 60.0 56 2.07 0.030 0.083 ❑A25 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 &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 5491A 10.6 6,81 47.0 39 5.80 0.029 0.100 0.022 < 0.010 0,169 0.233 01 11.6 548M 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 r 0.010 0.128 0.263 05 9.5 5491.6 11.1 6.47 42.4 35 4.35 0.027 0.089 c 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 0233 09 12.3 5488.8 9.3 6.50 40.2 34 6.07 0.144 0.084 < 0.010 0.198 0250 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 4A23 < 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 a 0,011 0.151 0.139 15 13.9 5489.7 10.5 6.81 61.1 0.026 c 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 6A3 50.2 0.025 c 0.083 0.023 ¢ 0.010 0.421 0.411 18 11.2 54923 8.8 6.57 47.0 0.035 < 0.080 0.022 < 0.010 0.168 0.192 19 7.2 5496A 7.9 6.25 41 A 0.029 a 0.087 < 0.020 < 0.013 0.130 0.187 20 11.1 5492.5 9.8 6.41 49X 0.032 < 0.143 < 0.020 < 0.010 4.147 0.218 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 6.17 332 25 0.73 0.018 0.046 < 0.020 < 0.009 0.125 0.139 Average 10.4 5491.4 9.7 6-56 51.7 45 7.20 0.038 0.094 0.024 0.011 0.309 0.384 #Tests 32 32 32 32 32 22 23 32 32 23 32 32 32 Site: ACMW-01 BE SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2020 Total Fecal l Fecal TD5 EC Chloride COD SO4 Color Coli E.colt 5trep Year mg/L umhos mg1L 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 a 5 < 2 a 2 91 88 118 1.7 < 5 6.01 a 5 3 a 2 82 80 105 1.4 6 5.17 a 5 2 < 2 83 103 140 1.7 13 4.49 < 5 < 2 2 < 2 94 85 129 1.7 < 5 3.54 a 4 < 2 c 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 a 1.2 < 1.1 00 77 97 0.9 < 5 1.49 < 5 < 1.1 < 1.1 01 69 85 1 A 8 1.27 13 a 1.1 < 1 A 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 a 5 1.22 < 1.1 < 1.1 11 95 125 1.9 < 7 1.33 < 1.1 a 1.1 12 97 112 1.4 1.95 < 1.1 < 1.1 13 86 100 1 A 1.98 a 1.1 < 1.1 14 89 101 1.4 2.31 a 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 Maximum 121 168 3.1 13 6.01 20 3.0 2.0 < 2 Minimum 66 74 0.9 2 1.13 c 4 c 1 < 1.0 a 2 Average 86 110 1.6 6 2.47 7 1.3 1.3 < 2 #Tests 32 32 32 23 32 17 32 32 1 Site AC MW-01 BE Nitrate-Nitrogenand Water Level Chlorides 5 5510 50 ++ 4 - - ---- 5500 40 - - - - I 3 ---- — --- 5490 J 30 E E 2 - 5480 20 1 1 5470 10 01. 0 5460 0 Nitra Le --o—Water Level Chloride Linear[Chloride] Total Dissolved Solids{TES) Total Phosphorus 500 0.20 400 0.15 300 J J 0.10 E 200 £ 0.05 0 0.00 --ip--TDS Linear(TIDS) Total P t_inear[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 56 Se TI V 2n 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 c4 30 c0.1 <10 <20 690 c0.2 420 c5 <50 el [1 <10 11/28/1989 12.5 1 5 13.8 <10 110 <10 <100 a1 <10 <50 150 al 120 <10 c5 <50 8/1/1990 8.8 0.6 3.3 5.3 <10 90 c4 34 c0.1 <10 <20 37 c0.2 25 e1 al <10 8/21/1991 11 0.9 5 5.4 <10 210 a4 49 a0.1 <10 <20 180 c0.2 54 cl cl <10 7/21/1992 10 0.8 4.1 5.4 <10 200 c4 45 r0.1 <10 <20 230 <0.2 49 <1 al <10 7/19/1994 11 0.8 4.4 5.8 <10 500 c2 54 0.1 <10 <20 330 <0.2 53 c1 c1 6.1 8/15/1995 13 0.8 5.3 6.5 <10 64 c1 59 c0.1 <10 <10 180 c0.2 80 c1 c1 9.5 6/19/1996 18 1 7.5 7.6 <10 140 c1 88 c0.1 <10 <10 220 c0.2 77 el al <5 6/16/1997 17 1.2 7.4 8.9 <10 170 a2 97 a0.5 <10 <25 480 c0.5 <10 c5 c5 <50 7/21/1998 7.85 0.697 3.25 5.52 e10 58 c2 c100 c0.5 <10 <20 333 c0.5 37.2 c2.5 r5 e25 6/20/1999 12.3 1.04 5.9 8.05 a10 160 c2 c100 al c0.1 a10 <20 171 c0.2 38.2 c5 c2.5 c3 cl cl <10 7/18/2000 5.94 0.694 3.24 6.24 a10 <2 c100 <20 348 a20 c2.5 <10 7/18/2000 9.85 1.19 3.05 10.3 <10 c2 c100 <20 78.6 54.4 c2.5 <10 6/19/2001 7.08 0.6 2.96 5.82 a10 c2 c100 a20 a100 <20 c2.5 <10 6/18/2002 6.60 0.589 2.54 5.7 <10 110 c2 37 c0.2 c0.2 cl <20 135 0.02 <20 cl c2.5 c1 c2 0.2 e10 6/17/2003 5.86 1.02 2.95 5.99 a10 300 <2 39.9 a0.2 c0.2 al <20 330 r0.01 <20 cl c2.5 cl c2 c0.2 a10 5/18/2004 8.10 0.635 3.49 6.44 <10 210 c2 c100 c0.2 c0.2 c1 <20 126 0.01 <20 c1 c2.5 c1 c2 c0.2 <10 6/14/2005 10.20 0.562 4.20 7.00 <10 c2 <100 <20 121 <20 c2.5 a10 6/1/2006 9.99 0.791 4.08 7.11 <10 120 c2 c2 c2 c2 <20 328 c0.2 <20 c2 [2 c2.5 [2 <10 el c2 e10 6/19/2007 7.34 0.659 2.93 5.96 <10 88 2.12 37 c1 c0.5 c1 <20 601 c0.2 <20 c2 c5 c2.5 al c5 c1 c3 <10 6/4/2008 5.09 0.557 2.2 5.11 a10 1200 c2 35 cl e0.5 e1 <20 626 a0.2 <20 r2 e5 Q.5 al e5 <1 a3 e10 6/17/2009 7.54 1.04 3.35 6.63 <10 1500 2.22 47 c1 c0.5 <1 <20 2820 c0.2 179 c2 c5 e2.5 el c5 c1 c3 17.5 6/9/2010 9.2 [1 3.90 6.90 c0.5 110 cl 44 cl c0.5 al 2.3 220 a0.2 7 c2 a5 c0.5 cl c5 cl c3 <20 6/14/2011 14.1 1 6.16 9.04 [0.5 42.6 <1 60.4 c1 c0.5 cl c2 545 c0.2 c2 c2 c5 c0.5 c1 c5 c1 c3 <20 6/14/2012 24.9 c1 56.2 cl <0.5 c1 r0.2 c2 c5 a1 <5 <1 c3 6/18/2013 7.35 0.562 2.91 5.69 6/17/2014 9.60 cl 4.35 6.89 c0.5 457 1.56 51.4 c1 c0.5 cl c2 579 c0.2 23.7 c2 c5 c0.5 cl c5 cl c3 c20 7/15/2015 11.0 1.37 5.36 7.3 <0.5 3600 c1 85.3 cl c0.5 3.83 <10 4660 c0.2 106 2.24 c5 1.71 c1 c5 c1 8.92 c20 7/12/2016 14.8 c1 6.3 8.32 c0.5 967 el 76.8 <1 c0.5 tl <2 885 <0.2 15.3 <2 e5 e0.5 c1 a5 al e3 <20 7/19/2017 7.53 al 3.29 5.47 c0.5 736 c1 41 cl c0.5 c1 c2 779 c0.2 15.0 c2 c5 c0.5 c1 c5 c1 c3 <20 8/6/2018 8.76 c1 3.68 5.94 c0.5 446 a1 44.2 cl a0.5 al c2 292 c0.2 5.95 <2 c5 a0.5 cl a5 c1 <3 <20 9/13/2019 6.82 c1.0 2.82 5.51 <0.5 345 rl 32.9 <1 <0.5 al r2 182 <0.2 4.17 <2 r5 a0.5 <1 a5 <1 a3 <20 7/15/2070 10.0 c1.0 4.25 6.80 c0.5 162 c1 51.3 el c0.5 e1 c2 126 c0.2 2.68 <2 r5 e0.5 <1 <5 <1 <3 <20 Site: ACMW-02N SOUTH TAHOE PUBLIC UTILITY DISTRICT ,LPINE COUNTY GROUNDWATER DUALITY DAT 2020 Depth Water Temp Alk Hard Turb Total P TKN NH,-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg1L mg/L mg/L mg/L 1I9l2020 8.36 5461.34 12.3 6.51 57.6 0.024 r 0.10 < 0.020 < 0.010 0.674 0.658 97 4/22/2020 8.72 5460.98 13.7 6.34 57.2 0.023 < 0.10 < 0.020 ¢ 0.010 0.660 0.66 96 7/15/2020 6.75 5462.95 13.1 6.35 58.4 0.023 0.28 ¢ 0.020 c 0.010 0.301 0.58 83 10/14/2020 7.62 5462.08 15.0 6.14 56.7 0.016 < 0.10 ¢ 0.020 < 0.010 0.156 0.16 89 Maximum 8.72 5463.0 15.0 6.51 58.4 0.024 0.280 ¢ 0.020 ¢ 0.010 0.67 0.66 97 Minimum 6.75 5461.0 12.3 6.14 56.7 0.016 < 0.100 < 0,020 < 0.010 0.156 0.160 83 Average 7.86 5461.8 13.5 6.34 57.5 0.022 < 0.145 ¢ 0.020 < 0.010 0.448 0.515 91 #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 2020 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 _ 1/912020 125 2.11 2.79 < 1 ¢ 1 4/22/2020 125 2.07 2.88 < 1 r 1 7/15/2020 131 1.85 2.66 < 1 < 1 10/14/2020 124 1.58 2.64 1.0 < 1 Maximum 131 2.11 2.88 1 c 1 Minimum 124 1.58 2.64 < 1 ¢ 1 Average 126 1.90 2.74 < 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: 2020 Depth Water Temp Alk Hard Turb Tolal P TKN NH3-N NO2-N NO,-N Total N Year ft Level C pH mg1L mg/L NTU mglL mg/L mg/L mg/L mg/L mglL 89 7.1 5458.7 12A 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 17A8 0.035 0.097 0.021 a 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 0207 92 7.0 5458.4 11.6 7.40 71.0 48 0.57 0.020 0.099 0.037 0.012 0.091 0202 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 6A9 59.0 47 0.40 0.021 0.117 < 0.020 < 0.01❑ 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 5458A 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 a 0.010 0.084 0.209 03 6.8 5458.6 12.8 6.77 53.7 1.60 0.015 0.094 < 0.01❑ 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 0278 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 a 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 6.6 5456.8 12.3 6.51 57.1 45 0.81 0.021 0.056 < 0.011 0.142 0.143 12 9.7 5460.0 12.2 6.64 62.9 0.026 < ❑.047 0.023 < 0.010 0.148 0.202 13 10.4 5459.3 12.3 6.63 65.5 ❑.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 a 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 1.936 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 6A9 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 5461.6 13.5 6.34 57.5 0.022 < 0.145 < 0.020 < 0.010 0.448 0.515 Maximum 11.3 5463.1 13.6 8.99 106A 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 a 0.020 a 0A09 0.057 0.128 Average 7.4 5459.3 12.3 6.82 63.0 47 2.07 0.022 0.094 0.024 0.012 0.306 0.385 #Tests 32 32 32 32 32 22 23 32 32 23 32 32 32 Site: ACMW-02N SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2020 Total Fecal l Fecal TDS EC Chloride COD SO4 Color Coll E.soli Strep Year mg/L umhos mg1L mg/L mgJL 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 a2 < 2 92 99 157 3.5 < 5 5.09 < 5 < 2 e 2 93 100 145 2.4 8 4.94 < 5 3 r 2 a 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 a 5 3.32 < 5 1.4 < 1.1 99 90 134 3.2 a 5 2.77 < 5 3.6 2.4 2.0 00 90 129 2.8 a 5 3.15 a 5 < 1.1 < 1.1 01 67 128 3.0 9 3.01 10 < 1.1 < 1.1 02 65 122 2.6 a 5 2.56 5 < 1.1 < 1.1 03 65 118 3.0 a 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 a 5 2.25 < 5 < 1.1 < 1.1 09 84 122 2.6 a 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 a 1.0 < 1.0 Maximum 130 231 6.8 9 9.73 10 3.6 2A 2.0 Minimum 79 114 1.7 2 2.18 < 4 1.0 1.0 r 2.0 Average 94 138 3.0 5 3.47 5 1.5 1.3 2.0 #Tests 32 32 32 23 32 17 32 32 2 Site AC MW-02 N Nitrate-Nitrogen and Water Level Chlorides 5 5470 50 4 W5 40 3 9 5460 m 30 J y J m 2 J w E E 5455 20 1 3 D _ 5450 10 �M m w w w w v v v v o -1 5445 0 ro w rn w w w v v v o a tNitrate +Water Level Linear(Nitrate) --w--Chloride Linear(Chloride) Total Dissolved Solids [TDS] Total Phosphorus 500 0.20 400 0.15 300 - E E 0.10 200 D.65 - 100 - 0 0.00 tTD5 Linear JDS) tTolal P Linear(Tote I P) Annual Metal Report ACMW-02N Access Gate Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Ma Ni Pb Sh 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 11/2/1988 11 3.5 5.1 28 <10 4200 a4 76 c0.1 <10 <20 3800 a0.2 550 7 <50 3 a1 16 11/28/1989 18.1 1.7 4.6 9.2 <10 <100 <10 a100 a1 <10 <50 580 al 530 <10 a5 a50 8/1/1990 28 3.2 2.7 15 <10 ISO <4 120 <0.1 a10 a20 280 a0.2 230 <1 al <10 8/21/1991 30 2.8 4.3 12 <10 89 <4 140 <0.1 a10 <20 180 a0.2 260 el <1 <10 7/21/1992 14 1.8 3.1 14 <10 a50 e4 76 <0.1 a10 40 40 <0.2 120 el <1 <10 7/19/1994 15 1.3 3.6 13 <10 180 a2 61 a0.1 <10 <20 140 c0.2 110 el a1 a5 8/15/1995 13 1.4 3 12 <10 a50 al 55 <0.1 <10 <10 <30 <0.2 15 c1 al <5 6/19/1996 14 1.4 3.5 12 <10 120 <1 58 c0.1 <10 <10 <30 a0.2 66 a1 cl e5 6/16/1997 15 1.5 3.8 12 <10 100 c2 a50 c0.5 <10 <25 74 c0.5 72 <5 c5 <50 7/21/1998 14.5 1.21 3.28 10.7 e10 119 a2 a100 a0.5 <10 <20 56.4 c0.5 65.8 c2.5 e5 c25 6/20/1999 10.9 1.33 3.17 10.9 <10 96 <2 <100 cl c0.1 <10 <20 a100 c0.2 59.4 c5 c2.5 c3 <1 cl <10 7/18/2000 6.01 3.07 1.61 24.9 <10 c2 <100 e20 92.8 e20 c2.5 e10 6/19/2001 11.6 1.22 3.56 9.99 <10 [2 a100 E20 e100 114 c2.5 <10 6/18/2002 11.0 1.38 2.69 10.2 <10 50 a2 43 c0.2 c0.2 el <20 <100 0.02 38.8 c1 c2.5 c1 a2 c0.2 <10 6/17/2003 9.37 1.23 3.01 9.11 <10 100 c2 41.4 a0.2 a0.2 al <20 a100 c0.01 56.1 cl <2.5 cl c2 c0.2 <10 5/18/2004 10.9 1.05 2.89 8.77 <10 30 c2 <100 c0.2 c0.2 el <20 <100 0.02 28.6 c1 a2.5 c1 a2 c0.2 <10 6/14/2005 10.1 0.968 2.7 8.18 <10 c2 <100 <20 <100 e20 c2.5 <10 6/1/2006 9.91 1.12 2.85 8.77 <10 60 <2 c2 c2 c2 <20 128 a0.2 62.9 a2 c2 c2.5 c2 e10 el <2 <10 6/19/2007 12.4 1.14 3.18 8.38 <10 49 c2 38 c1 c0.5 <1 <20 <50 a0.2 34.5 <2 c5 a2.5 c1 c5 c1 c3 <10 6141200E 12.3 1.19 3.13 8.73 <10 100 a2 48 c1 1.5 6.8 <20 86.5 c0.2 91.2 6.5 <5 <2.5 3.5 c5 1.3 6.6 <10 6/17/2009 12.5 0.991 3.16 8.5 12.3 58 c2 Al c1 c0.5 a1 <20 <50 c0.2 43 c2 es r2.5 c1 e5 cl e3 <10 6/9/2010 12.0 1.10 3.3 7.40 a0.5 260 <1 39 a1 c0.5 a1 400 33 c0.2 65 c2 c5 c0.5 c1 <5 <1 <3 28 6/14/2011 12.0 1.13 3.48 9.17 <0.5 28.6 <1 37.6 cl c0.5 a1 a2 <20 c0.2 27.9 c2 c5 c0.5 c1 c5 c1 e3 <20 6/14/2012 <20 c1 49.3 c1 c0.1 c1 c0.2 e2 c5 [1 c5 cl c3 6/18/2013 13.7 1.06 3.3 9.66 6/17/2014 13.3 1.23 3.54 8.76 c0.5 33.5 c1 38.9 c1 <0.5 al [2 <20 a0.2 8.63 <2 c5 c0.5 cl c5 c1 c3 <20 7/15/2015 15.7 1.03 3.59 9.78 c0.5 87.6 <1 39.9 c1 a0.5 al a10 <20 c0.2 17.6 c2 c5 e0.5 c1 <5 <1 <3 <20 7/12/2016 13.0 1.02 3.58 7.91 c0.5 105 c1 41 <l <0.5 <1 <2 19.8 e0.2 25 a2 c5 a0.5 c1 c5 c1 a3 <20 7/19/2017 14.6 1.04 4.42 7.66 c0.5 481 cl 40.9 cl e0.5 cl a2 46.7 c0.2 72.8 <2 c5 c0.5 <1 c5 a1 c3 <20 8/6/2018 15.1 cl 6.28 7.76 c0.5 1170 cl 47.3 cl c0.5 cl c2 70.4 c0.2 117 a2 <5 <0.5 <1 a5 c1 a3 <20 8/13/2019 12.0 a1.0 4.75 7.45 <0.5 673 c1 44.3 <1 c0.5 al a2 47.9 c0.2 119 c2 c5 e0.5 c1 <5 <1 <3 <20 7/15/2020 12.6 c1.0 4.36 7.63 a0.5 344 c1 48.5 c1 e0.5 al a2 <20 e0.2 47.5 <2 c5 c0.5 al c5 c1 c3 <20 Site: ACMW-02S SOUTH TAHOE PUBLIC UTILITY DISTRICT 4LPINE COUNTY GROUNDWATER QUALITY DATE 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO,-N Total N TDS Date ft Level C pH m 1L m 1L NTU m L m IL m 1L m 1L mgfL m 1L m IL 1/9/2020 10.15 5461.45 11.8 6.25 58.7 0.017 < 0.10 < 0.020 < 0.010 < 0.010 < 0,10 94 4/22/2020 10.27 5461.33 11.2 6.12 69.0 0.015 < 0,10 < 0,020 < 0,010 < 0.010 ¢ 0.10 100 7/15/2020 6.6 5465.00 14.5 6.12 55.2 0.020 0.20 < 0.020 < 0.010 ¢ 0.010 0.20 78 10/14/2020 8.2 5463.40 18.1 6.03 44.5 0.018 a 0.10 < 0,020 < 0.010 < 0.010 < 0.10 81 Maximum 10,27 5465.0 18.1 6.25 69,0 0,020 0.200 a 0,020 < 0.010 < 0,010 0.200 100 Minimum 6,60 5461.3 11.2 6.03 44.5 0,015 < 0.100 < 0.020 < 0.010 < 0,010 < 0.10 78 Average 8.81 5462.8 13.9 6.13 56.9 0.018 0.125 < 0.020 < 0.010 < 0,010 0.125 88 #Tesls 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 2020 Total Fecal! Fecal EC Chloride COD SO4 Color Coli E.coli Strep Date umhos mg1L mg1L mg1L Units MPN MPN MPN Comments 1/9/2020 123 112 1.59 < 1 < 1 4/22/2020 144 2.65 2.55 < 1 < 1 7/15/2020 120 0.934 1.95 102 1 10/14/2020 99.5 1.54 2.26 22.8 < 1 Maximum 144 2.65 2.55 102 1 Minimum 100 0.93 1.59 < 1 < 1 Average 122 111 2.09 31.7 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: 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO,-N Total N Year ft Level C pH m L m L NTI.1 m 1L m IL m IL m 1L m L M. 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 0.168 94 7.4 5459.8 12.5 6.84 54.0 42 2.92 0.030 0.114 0.027 ¢ 0.010 0.087 0210 95 6.8 5460.5 12.0 6.57 51.0 36 0.96 0.030 0.118 0.054 0.010 0.101 0226 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 0.126 < 0.021 < 0.010 0.138 0277 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 6A4 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 &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 5458.6 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 46A 0.021 0.059 0.023 ¢ 0.010 0201 0.263 13 12.4 5459.2 12A 6.54 50.9 0.032 0.060 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 1.165 15 12.4 5459.2 13.8 6.15 42.0 0.019 0.108 a 0.020 < 0.020 3.036 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 c 0.020 < 0.010 < 0.010 0.125 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 T9 5460.7 12.3 6.46 49.0 38 1.35 0.021 0.106 0.025 0.012 0.382 0.464 #Tests 32 32 32 32 32 22 23 32 32 23 32 32 32 Site: ACMW-02S SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2020 Total Fecal! Fecal TDS EC Chloride COD SO4 Color Cali E.coli Strop Year mg/L umhos mg/L mg1L mg/L Units MPN MPN MPN Comments 89 85 133 1.8 5 4.78 4 c 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 a 5 3.58 c 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 A < 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 A 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 A 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 87 117 134 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 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 78 109 1.9 5 2.98 5 6.5 1.3 < 2 #Tests 32 32 32 23 32 17 32 32 1 Site ACMW-02S Nitrate-Nitrogen and Water Level Chlorides 5 5470 50 4 40 5465 - - -- - 3 5460 m 30 — J 2 -- E E 5455 m 20 1 � 0 - - --, 5450 10 0 -1 5445 9 m m o 0 0 0 � r 9 Mime t Water Level Linear(NIQate) Chloride Linear(Chloride) Total Dissolved Solids JDS] Total Phosphorus 500 0.20 400 - 0.15 300 J J ca E 0.10 ... E 200 - - 0.05 100 0.00 O TOS Linear[TOS] �Tot3l P Linear(To raI 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 Sh 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 a10 200 c4 30 <0.1 <10 a20 260 [0.2 190 6 <50 ci <1 <10 11/28/1989 10.7 1.3 3.8 16 <10 a100 a10 a100 <1 <10 a50 <100 <1 <10 <10 <5 <50 8/1/1990 11 1.9 2.8 9.2 a10 <50 <4 57 <0.1 <10 <20 a30 50.2 28 c1 <1 <10 8/21/1991 11 1.9 3 7,1 <10 <50 <4 53 <0.1 a10 <20 a30 a0.2 10 a1 <1 <10 7/21/1992 12 1.8 2.8 8.4 <10 <50 <4 55 r0,3 a10 a20 c0.2 a1 <1 <10 7/19/1994 13 1.8 3.2 7.1 <10 310 <2 69 0.1 a10 <20 320 <0.2 76 c1 <1 6 8/15/1995 12 1.8 2.9 6.8 <10 <50 <1 59 0.2 a10 a10 <30 c0.2 c5 r1 <1 c5 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 a10 75 <2 <50 7.4 a10 a25 a50 a0.5 <10 <5 <5 <50 7/21/1998 11.1 1.77 2.36 6.31 <10 65 i2 a100 i0.5 <10 a20 63.9 40.5 <20 <2.5 <5 <25 6/20/1999 7.93 1.70 3.43 5.73 a10 <50 Q a100 c1 <0.1 <10 <20 <100 c0.2 <20 t5 <2.5 <3 <1 1 a10 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 al a2.5 <1 a2 c0,2 c10 6/17/2003 9.58 1.44 2.53 5.57 a10 <10 a2 51.7 <0.2 a0.2 <1 a20 <100 <0.01 <20 <1 <2.5 <1 <2 <0.2 <10 5/18/2004 831 1.66 2.15 4.99 <10 20 <2 <100 <0.2 <0.2 <1 c20 <100 <0.01 <20 e1 r2.5 [1 <2 t0.2 <10 6/14/2005 9.02 1.40 2.02 4.97 a10 <2 a100 a20 <100 Q0 <2.5 a10 6/1/2006 9.11 1.72 2,23 5.54 <10 50 <2 <2 <2 <2 <20 163 <0.2 <20 <2 aZ <2.5 a2 a10 al <2 <10 6/19/2007 10.1 1.73 2.2 5.54 <10 62 c2 46 <1 <0.5 <1 <20 112 c0.2 c2 <2 <5 <2.5 <1 [5 a1 <3 <10 6/4/2008 9.61 1.79 2.15 5.20 <10 78 a2 49 <1 a0.5 <1 <20 249 a0.2 <20 <2 c5 c2.5 c1 <5 c1 <3 a10 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 <70 <2 <5 a2.5 al <5 <1 <3 12.8 6/9/2010 10.0 1.70 2.4 5.20 s0.5 91 <1 46 <l <0.5 <l <2 62 a0.2 3 <2 c5 c0.5 <1 c5 <1 <3 <20 6/14/Z011 9.56 1.71 ZA 5.19 <0.5 43.9 c1 41.9 <1 a0.5 al a2 358 <0.2 d a2 c5 c0.5 <1 <5 <1 <3 <20 6/14/2012 40.9 c1 43.2 <1 <0.5 <1 c0,2 <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 c0.5 315 1.46 34.6 <l c0.5 c1 c2 1080 <0.2 2.47 <2 <5 c0.5 <l <5 <l <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 e20 7/12/2016 11.7 1.87 2.73 5.58 a0.5 279 al 55.7 al a0.5 al a2 189 <0.2 2.14 a2 <5 1.66 <1 c5 <1 <3 <20 7/19/2017 11.2 1.83 2.56 6.18 a0.5 37 al 49.9 <1 a03 <1 a2 36.2 <0.2 <2 a2 <5 a0.5 cl c5 <1 c3 <20 8/6/2018 11.6 1.88 2.55 6.63 <0.5 22.5 <1 56.4 <1 <0.5 <1 Q 58.6 <0.2 5.74 r2 [5 <0.5 <l C5 <l a3 <70 8/13/2019 12.8 1.92 2.78 6.58 <0.5 a20 al 62.6 al a03 al a2 <20 <0.2 3.32 a2 <5 40.5 <l <5 <1 <3 <20 7/15/2020 12.7 1.66 2.78 5.49 <0.5 QO c1 67.2 <1 c0.5 c1 c2 <20 <0.20 <2 <2 <5 [0.5 <1 [5 <1 <3 QO Site: ACMW-04W SOUTH TAHOE PUBLIC UTILITY DISTRICT LPINE COUNTY GROUNDWATER QUALITY DAT 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N N0,-N NO3-N Total N TD5 Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 01/09/20 18.98 4900.91 11 A 6.38 40.8 0.018 ¢ 0.10 < 0.020 < 0.010 1.48 1.42 136 04/22/20 16.11 4903.78 13.5 6.28 41.6 0.017 < 0.10 < 0.020 < 0.020 1.71 1.7 126 07/15/20 9.62 4910.27 12.5 6.28 40.9 0.021 0.33 < 0.020 < 0.010 1.22 1.6 117 10114/20 16,75 4903.14 13A 6.04 43.9 0.016 ¢ 0.10 < 0.020 < 0.020 1.33 1.3 124 Maximum 18.98 4910.27 13.5 6.38 43.9 0.021 0.33 < 0.020 < 0.020 1.71 1.70 136 Minimum 9.62 4900.91 11.4 6.04 40.8 0.016 < 0.10 < 0.020 < 0.010 1.22 1.30 117 Average 15.37 4904.53 12.6 6.25 41.8 0.018 0.16 < 0.020 < 0.015 1.44 1.51 126 #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 2020 Total Fecal/ Fecal EC Chloride COD SO4 Color Coli E.coli Strep Date umhos mg/L mg/L mg1L Units MPN MPN MPN Comments 01/09120 182 17.8 14.8 < 1 ¢ 1 04/22120 180 17.2 14.5 < 1 < 1 07/15/20 177 16.0 12.4 21.8 < 1 10/14/20 180 15.4 15.2 49.5 < 1 Maximum 182 17.80 15.2 49.5 < 1.0 Minimum 177 15.40 12.4 < 1 < 1.0 Average 180 16.60 14.2 18.3 < 1.0 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-04W SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER DUALITY DATA From: 1989 To: 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO,-N Total N Year ft Level C pH m m 1L NTU mg1L m IL m 1L m /L m 1L m 1L 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 12A 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 a 0.051 4.43 4.505 10 14.3 4901.6 12.6 6.10 48.6 43 1.07 0.020 c 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 47A 0.021 < 0.093 0.023 < 0.028 2.34 2.508 13 15.3 4904.E 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 Maximum 17.2 4907A 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 14.4 4902.7 12.1 6.15 42.9 58 5.45 0.030 0.122 0.025 0.023 2.65 2.757 #Tests 32 32 32 32 32 22 23 32 32 23 32 32 32 Site: ACMW-04W SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2020 Total Fecal/ Fecal TD5 EC Chloride COD SO4 Color Coli E.coli 5trep Year m fL umhos m /L m /L m IL 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 a 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 12A 6 1145 < 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 A 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 a 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 < 1A 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 c 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 Maximum 244 329 53.1 16 32.04 10 362.0 3.6 < 2 Minimum 123 180 12.4 2 6.93 c 5 1.1 < 1.0 < 2 Average 154 222 23.5 6 15.58 5 20.6 1.5 a 2 #Tests 32 32 32 23 32 17 32 32 1 Site AG IV W-04W Nitrate-Nitrogen and Water Level Chlorides 10 4910 100 9 4908 90 8 4906 80 7 4904 $ 76 8 4902 m 60 -- J E 5 - 4900 50 4 4898 m 40 3 f 4896 �+ 30 2 4894 20 1 - -- 4892 0 _ - 0 4890 rn m u n m ar in n m m u � o p ro rn rn a rn rn o 0 0 0 0 Nitrate +Water Level Linear[Nitrate] Ghl-d� i (Chlxd.) Total Dissolved Solids JDS) Total Phosphorus 500 0.50 400 0-40 300 0.30 J J 200 020 100 - 0-10 - 0 0-00 P P o 0 --.9—TDS Linear(TDS) Total P Linear(Total P) Annual Metal Report ACMW-44W Gansberg Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe fig Mn Mo Ni Pb Sb Se TI V 2n mg/L m g/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 a0.1 <10 <20 790 c0.2 430 a5 <50 1 c1 e10 11/28/1989 31.4 4 7.7 40.6 <10 130 <10 220 c1 a10 a50 140 al 17 <10 t5 <50 8/1/1990 27 4.2 6 16 <10 170 <4 190 a0.1 <10 a20 120 c0.2 13 c1 al <10 8/21/1991 25 4.2 6.3 15 <10 a50 <4 160 a0.1 <10 <20 <30 c0.2 <10 [1 al <10 7/21/1992 30 4.4 6.5 20 <10 230 c4 190 0.1 a10 a20 340 <0.2 14 c1 el <10 7/12/1994 22 3.7 4.8 20 <10 350 <2 140 a0.1 a10 a20 290 c0.2 6.5 el al c5 8/15/1995 21 3.8 4.7 20 <10 51 c1 150 0.1 d0 <10 e30 e0.2 e5 al c1 e5 6/19/1996 19 3.5 4.3 19 <10 95 1 140 a0.1 <10 <10 <30 c0.2 c5 el <1 a5 6/16/1997 17 4.2 4 20 <10 67 c2 120 c0.5 <10 <25 83 <0.5 <10 a5 c5 <50 7/21/1998 16.1 3.35 3.36 19.4 <10 133 c2 <100 c0.5 <10 <20 73.9 c0.5 <20 <2.5 a5 <25 6/20/1999 11.4 3.16 2.02 17.7 e10 82 a2 <100 el a0.1 e10 <20 <100 e0.2 a20 c5 c2.5 c3 2 cl 10.2 7/19/2000 9.41 3.03 2.73 17.9 <10 c2 122 <20 119 <20 r2.5 <10 6/19/2001 12.9 3.13 2.82 19.7 <10 c2 <100 <20 <100 <20 c2.S <10 6/18/2002 13.7 3.6 2.92 22.4 e10 e10 c2 98 c0.2 c0.2 rl e20 <100 0.02 e20 c1 c2.5 cl c2 c0.2 <10 6/17/2003 11.5 2.84 2.83 21.8 <10 <10 c2 106 c0.2 c0.2 cl <20 <100 c0.01 <20 cl e2.5 cl [2 e0.2 <10 5/18/2004 10.9 2.95 2.6 20.0 <10 <10 c2 <100 e0.2 c0.2 cl <20 <100 e0.01 <20 c1 a2.5 cl c2 a0.2 <10 6/14/2005 11.0 2.87 2.55 19.3 e10 a2 <100 <20 a100 a20 Q.5 e10 6/1/2006 12.5 3 2.47 19.7 <10 a50 a2 a2 27 e2 <20 <100 <0.2 <20 <2 c2 a2.5 c2 <10 cl c2 10.2 6/19/2007 12.1 3.11 2.55 22.8 e10 21 e2 85 rl e0.5 <1 <20 e50 e0.2 e20 e2 c5 a2.5 c2 c5 <1 c3 <10 6/4/2008 10.7 3.15 2.25 20.8 <10 42 c2 110 c1 c0.5 c1 <20 66 c0.2 <20 c2 c5 c2.5 c1 c5 c1 r3 <10 6/18/2009 12.9 3.37 2.96 23.1 13.7 33 e2 100 <1 r0.5 al e20 94.2 e0.2 e20 c2 c5 a2.5 c1 a5 al c3 15.1 6/9/2010 14.0 3.10 3.10 24.0 c0.5 <20 cl 100 al c0.5 cl c2 QO c0.2 c2 c2 c5 c0.5 cl c5 el c3 e20 6/14/2011 12.4 3.14 2.98 25.2 <0.5 45.4 el 92.8 r1 c0.5 cl c2 464 c0.2 2.01 <2 <5 c0.5 <1 <5 al c3 <20 6/14/2012 <20 <1 81.5 cl e0.5 al <0.2 c2 c5 cl c5 cl c3 6/18/2013 9.6 2.8 1.90 21.8 6/17/2014 10.6 2.92 2.44 24.2 e0.5 <20 c1 78.9 el c0.5 c1 c2 e20 c0.2 e2 [2 [5 c0.5 el [5 al c3 a20 7/15/2015 9.33 2.64 2.18 21.9 e0.5 Q0 <1 85.5 c1 c0.5 al e10 26.4 e0.2 s2 c2 c5 c0.5 c1 c5 c1 c3 <20 7/12/2016 11.2 2.91 2.66 24.9 c0.5 <20 c1 91.6 c1 c0.5 c1 c2 <20 c0.2 e2 c2 r5 [0.5 [1 c5 <l <3 <20 7/19/2017 12.7 3.27 2.81 25.1 e0.5 <20 <1 95.1 al e0.5 <1 <2 39.3 e0.2 e2 c2 a5 c0.5 c1 c5 c1 c3 c20 8/2/2018 10.1 2.66 2.24 23.4 c0.5 <20 c1 81.3 c1 c0.5 c1 c2 c20 e0.2 e2 c2 c5 e0.5 [1 [5 c1 c3 <20 8/13/2019 10.3 2.55 2.24 22.4 c0.5 <20 <1 82.3 al c0.5 c1 c2 a20 a0.2 a2 c2 c5 c0.5 cl c5 cl c3 c20 7/15/2020 9.08 2.29 2.01 21.8 a0.5 <20 cl 79 cl c0.5 cl c2 <20 c0.2 c2 c2 c5 c0.5 cl <5 cl c3 <20 Site: ACMW-06S SOUTH TAHOE PUBLIC UTILITY DISTRICT _PINE COUNTY GROUNDWATER QUALITY DA1 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TD5 Date ft Level C pH mg/L_ m91 NTU mg/L mg1L mg/L mg1L mglL mg/L mg1L 1/9/2020 3.95 5219.55 11.9 6.99 274 0.161 0.333 < 0.020 < 0.010 ¢ 0.010 0.333 458 4/22/2020 15.15 5208.35 15.0 9.04 115 0.020 < 0.10 ¢ 0.020 0.044 0.197 0.24 286 7/15/2020 16,70 5206.80 14.0 7.31 200 0.090 0.40 < 0.020 < 0.010 0.026 0.43 360 10/14/2020 16.08 5207.42 13.2 7.32 221 0.079 < 0.10 < 0.020 < 0A20 0.028 < 0.10 386 Maximum 16.70 5219.6 15.0 9.04 274 0.161 0.400 < 0.020 0.044 0.197 0.430 458 Minimum 3.95 5206.8 11.9 6.99 115 0.020 < 0.100 a 0.020 < 0.010 < 0.010 < 0.100 286 Average 12.97 5210.5 13.5 7.67 203 0.088 0.233 < 0.020 0.021 0.065 0.276 373 #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 2020 Total Fecal Fecal EC Chloride COD SO4 Color Coli E.coli Strep Date umhos mg1L mg1L mg/L Units MPN MPN MPN Comments 119/2020 726 65.3 20.1 < 1 < 1 4/22/2020 459 69.5 28.8 ¢ 1 c 1 7/15/2020 608 57.9 20.8 < 1 ¢ 1 10/14/2020 647 58.2 23.7 < 1 < 1 Maximum 726 69.5 28.8 < 1 c 'I Minimum 459 57.9 20.1 < 1 r 1 Average 610 62.7 23A < 1 c 1 #Tests 4 4 0 4 ❑ 4 4 ❑ Site: ACMW-06S SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 1989 To: 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH m IL m 1L NTU m IL m L m 1L m 1L m IL m.91L 89 14.8 5205.9 11.9 9.29 209 170 29.13 0.060 0.253 0.119 ¢ 0.010 0.028 0292 90 14.9 5205.9 12.7 8.12 207 276 12.33 0.069 0.152 0.028 0.010 0.065 0227 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 0A21 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 0201 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 12A 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 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 15A 5206-1 12.3 7.99 206 230 11.10 0.056 0.282 0.091 0.025 0.059 0.342 #Tests 32 32 32 32 32 22 23 32 32 23 32 32 32 Site: ACMW-06S SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER DUALITY DA From 1989 To: 2020 Total Fecal l Fecal TES EC Chloride COD SO4 Color Coli E.coli Strep Year mg1L umhos mg1L mglL mg1L 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 93A 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 A 5 25.1 < 1.1 < 1.1 08 378 625 62.0 6 25.8 12 1.2 < 1.1 09 366 576 61 A < 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 6.7 < 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 16 330 641 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 c 1.0 20 373 610 62.7 23.4 < 1.0 < 1.0 Maximum 454 741 93.4 17 46.3 13 17.6 7.0 < 2 Minimum 315 541 56.3 < 5 22.4 r 4 < 1.0 ¢ 1.0 < 2 Average 362 628 69.6 7 27.2 7 4.1 1.7 < 2 #Tests 32 32 32 23 32 17 32 32 1 Site ACMW-06S Nitrate-Nitrogen&Water Level Chlorides 5 5210 200 180 4 - 5208 160 140 - — — 3 5206 m 120 is W 100 E E 2 5204 m 80 R � 60 5202 40 20 0 5200 0 rn M N rn cn n � m r N � rn m rn rn m rn rn o 0 0 0 0 � w rn rn w rn rn o a o 0 0 t Nitrate Water Level Linear(Nitrate) Chloride Linear(Chloride) Total Dissolved Solids(TDS) Total Phosphorus 1000 0.4 - 900 800 0.3 700 600 J J w 500 ao 0.2 - E E 400 300 - - Q.1 - 200 - 100 — Q m Q.0 On P O O O O 00 m rn w rn W o 0 0 0 0 �TQ5 Linear[TQS] �-Total P Linear jolal Py Annual Metal Report ACMW-06S Cello Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sh 5e TI V 2n 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 a10 1100 a4 77 c0.1 e10 e20 1900 <0.2 590 14 e50 2 el 13 11/28/1989 103 10.1 15.4 39.8 e10 a100 e10 390 <1 <10 <50 <100 <1 250 e10 <5 a50 8/1/1990 72 8.2 28 37 a10 <50 a4 160 c0.1 e10 e20 e30 <0.2 47 c1 el <10 8/21/1991 76 8.2 33 37 <10 230 <4 250 0.1 a10 a20 190 <0.2 200 1 al e10 7/21/1992 78 8.2 16 41 <10 <50 <4 200 a0.1 a10 <20 33 a0.2 54 [1 <1 e10 7/19/1994 75 8.3 17 50 a10 440 c2 200 0.7 <10 <IO 230 <0.2 140 <1 [1 8 8/15/1995 96 7.6 30 44 a10 87 1.4 290 c0.1 e10 <10 58 <0.2 280 c1 [1 <5 6/19/1996 81 9.1 32 52 <10 74 1 36 0.2 a10 a10 2400 <0.2 360 r1 al e5 6/16/1997 81 9 18 40 <10 46 <2 190 c0.5 a10 a25 <50 <0.5 73 <5 <5 <50 7/21/1998 60 8.03 12.5 40.1 <10 <25 6 190 a0.5 <10 <20 a30 a0.5 <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 a20 <100 a0.2 123 [5 <2.5 <3 <1 <1 a10 6/19/2001 35.5 7.47 26 38.3 a10 <2 115 e20 e100 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 el [2 <0.2 <10 6/17/2003 56.6 6.48 12.6 39.5 a10 160 c2 139 <0.2 c0.2 3 e20 134 e0.01 345 3 C2.5 al a2 <0.2 <10 5/18/2004 83.4 6.88 14.6 35.6 <10 240 r2 173 <0.2 a0.2 3 a20 156 0.03 140 2 <2.5 [1 <2 e0.2 <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 a2 a2 <2 <20 e100 <0.2 <20 2 3 Q.5 c2 e10 el a2 <10 6/19/2007 63.8 7.21 25.1 32.8 <10 <20 3.45 200 al e0.5 <1 <20 106 <0.2 e20 c2 e5 <2.5 el <5 [1 <3 <10 6/4/2008 69.1 7.92 24.5 33.8 a10 48 2.54 210 al a0.5 e1 <20 127 <0.2 <20 c2 a5 c2.5 c1 [5 el <3 <10 6/17/2009 64.3 7.71 15.7 34.3 14.2 970 2.39 150 c1 c0.5 [1 <20 1030 <0.2 115 8.1 <5 <2.5 <1 a5 c1 c3 13.7 6/9/2010 62.0 6.90 17.0 35.0 <0.5 200 <1 150 al a0.5 t1 2.2 a20 a0.2 35 5.7 [5 [0.5 el <5 <l a3 a20 6/14/2011 57.9 7.25 11.3 36.7 a0.5 263 al 100 c1 c0.5 1.1 <2 <20 e0.2 8.46 7.83 <5 <0.5 al a5 c1 c3 <20 6/14/2012 408 2.72 193 al a0.5 r1 a0.2 2.51 e5 el <5 al <3 6/18/2013 57.9 6.92 18.7 32.0 6/17/2014 60.9 6.78 22.3 31.8 <0.5 85 1.96 172 <1 a0.5 r1 2.29 a20 a0.2 5.82 2.26 [5 <0.5 el <5 [1 <3 <20 7/15/2015 44.7 6.72 12.6 31.6 <0.5 137 [1 148 al <0.5 <1 <10 <20 <0.2 9.76 5.01 a5 c0.5 cl <5 c1 e3 <20 7/12/2016 52.3 6.58 21.8 30.3 c0.5 20.8 1.16 159 al a0.5 <1 <2 <70 <0.2 181 2.64 <5 <0.5 al a5 cl c3 <20 7/19/2017 57.3 6.92 22.7 32.3 c0.5 33.1 1.29 151 el e0.5 [1 [2 <20 <0.2 11.7 r2 <5 <0.5 c1 a5 c1 <3 <20 8/6/2018 60.5 6.94 23.0 30.9 <0.5 22.5 1.5 166 c1 1.29 [1 2.3 129 <0.2 16.5 [2 13.7 <0.5 al a5 al c3 <20 8/13/2019 57.3 6.74 22.7 29.7 <0.5 <20 2.2 175 al <0.5 a1 a2 a20 a0.2 3.59 <2 e5 <0.5 [1 <5 al <3 a20 7/15/2020 53.5 6.55 21.4 29.1 a0.5 53.4 1.97 180 [1 <0.5 [1 [2 23.2 <0.2 16.6 <2 a5 <0.5 c1 a5 c1 <3 e20 Site: ACMW-20 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO,-N NO,-N Total N Date ft Level C pH mg1L mg/L NTU mg1L mg/L mg/L mg/L mg/L mg/L 2/11/2020 15.41 5074.89 10.5 6,02 32,6 0.063 < 0.050 < 0.020 < 0.010 0.434 0.46 5/27/2020 5.72 5084.58 11.1 6,27 34A 0.062 0.19 < 0.020 < 0.010 0-676 0.87 8/8/2020 12.40 5077,90 14.0 6.09 31.1 0.073 < 0.10 < 0.020 < 0.010 0.043 < 0.10 11/9/2020 15.81 5074.49 14.2 6.01 32.9 0.066 < 0.10 < 0.020 a 0.010 0.213 0.21 Maximum 15.81 5084.58 14.2 6.27 34.4 0.073 0.19 < 0-020 < 0 010 0.68 0.87 Minimum 5.72 5074.49 10.5 6.01 31.1 0.062 < 0.050 < 0 020 < 0 010 0.043 < 0.10 Average 12.34 5077.97 12.5 6.10 32.8 0.066 0.110 < 0 020 a 0 010 0.342 0.41 #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 DUALITY DATA 2020 Total Fecal l Fecal TD5 EC Chloride COD SO4 Color Coli E. coli 5trep Date mg/L umhos mg1L mg/L mg/L Units MPN MPN MPN Comments 2/11/2020 fib 88.3 2.41 2.16 < 1 < 1 5/27/2020 74 86 2.97 2.45 1 ¢ 1 0/8/2020 53 69.1 1.28 1.24 488 < 1 11/9/2020 70 80.8 2.05 1.87 < 1 < 1 Maximum 74 88.3 2.97 2.45 488 < 1 Minimum 53 69.1 1.28 1.24 < 1 < 1 Average 66 81.1 2.18 1.93 122.8 < 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: 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO,-N NO,N Total N Year ft Level C pH mg/L mglL N7U mg/L mg/L mg/L mg)L mg/L mg1L 12 10.9 5079.4 11.5 6.11 33A 11 0.054 0.073 0.025 c 0.010 0.516 0.599 13 10.6 5079.7 11.6 610 31.4 ❑.085 0.051 ❑.026 a 0.013 0.623 0.856 14 12.7 5077.6 12.2 6.31 29.7 0.066 0.065 ❑❑25 a 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 6A5 30.9 0.058 0.375 c 0.020 < 0.063 5.344 5.626 17 9.3 5081.0 11.7 6A6 30.3 0.063 0.163 0.021 a 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 &05 32.3 0.063 0.125 < 0.020 c 0.015 1.920 1.938 20 12.3 5078.0 12.5 6.10 3M 0.066 0.110 s 0 020 r 0.010 ❑.342 0.410 Maximum 13.8 5081.❑ 13.1 6.31 34.1 1.2 0.085 0.375 ❑.026 0.063 5.344 5 626 Minimum 9.3 5075.5 11.5 6,05 29.7 1.2 0.054 0.051 < 0.020 < 0.010 0.342 0.410 Average 11.6 5078.7 12.2 6.15 31.8 1.2 0.065 0.131 0.022 0.019 1.540 1.581 #Tests 9 9 9 9 9 ❑ 1 9 9 9 9 9 9 Site: ACMW-20 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2012 To: 2020 Total Fecal l Fecal TD5 EC Chloride COD 504 Color Coli E.coli Strap Year mg1L 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 a 1 19 78 99 2.93 2.70 25 < 1 20 66 81 2.18 1.93 123 < 1 Maximum 107 130 3.03 4.61 123 1 Minimum 66 77 1.32 1.93 1 < 1 Average 77 91 2.13 2.86 22 1 #Tests 9 9 9 0 9 0 9 9 0 Site AC MW-20 Nitrate-Nitrogen &Water Level Chlorides 20 5088 50 16 - 5084 40 r 12 - -- - 5080 m 30 -J y J E 8 5076 E 20 3 4 � 5072 10 - 0 5068 0 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 18 19 20 Nitrate --mWater Level Linear{Nitrate} _ Chloride Total Dissolved Solids JDS] Total Phosphorus 500 0.50 - 400 0-40 - - 300 0.30 J J Q1 Cp E E 200 0.20 - - 100 0-10 I 0 0-00 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 1S 19 20 ---r—TDS +Total P Annual Metal Report ACMW-20 Diamond Valley Rd - Paynesville Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Me Ni Pb 5b 5e TI V 2n 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 e0.2 <20 [2 <5 <2.5 <1 <5 al <3 a10 6/11/2013 5.50 1.83 1.22 3.84 7/8/2014 6.55 2.04 1.62 4.34 a0.5 103 1.54 19.9 <1 a0.5 <1 2.32 502 <0.2 3.41 <2 e5 e0.5 <1 <5 <1 <3 <20 8/18/2015 8.28 2.5 2.11 5.25 a0.5 61.6 al 22.4 [1 a0.5 el c2 91.6 a0.2 c2 2.11 e5 e0.5 el e5 el e3 e20 7/27/2016 8.20 2.21 2.04 5.24 a0.5 41.6 al 20.9 [1 a0.5 al c2 33.7 c2 c2 e5 a0.5 al a5 al a3 <20 8/16/2017 5.85 1.58 1.32 4.70 e0.5 466 al 18.4 el a0.5 el Q 488 c0.2 3.59 1.96 e5 e0.5 al e5 el 3.3 e20 8/29/2018 7.61 1.94 1.87 5.19 a0.5 68.8 <1 21.9 <1 <0.5 it [2 65.6 <0.2 [2 1.99 e5 e0.5 <l e5 el e3 <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 al <5 [1 3.8 <20 8/8/2020 6.32 1.56 1.58 4.55 c0.5 296 c1 18.9 al t0.5 al t2 338 e0.2 3.68 2.3 c5 c0.5 c1 c5 <1 a3 <20 Site: ACMW-21 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Depth Water Temp Alk Hard Turb Tolal P TKN NH,N NO,-N NO3-N Total N Date Fl Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 01/30/2020 14.10 4997.23 8.5 6.64 29.9 0.069 0.155 < 0.020 < 0.010 0.068 0.223 05/14/2020 9.18 5002,15 5A 6.15 25.8 0.074 1.1 < 0.020 < 0.010 0.519 1.6 07/2712020 9.61 5001.72 101 6.36 39.4 0.083 0.11 < 0.020 < 0.010 0.968 1.1 11/12/2020 17.28 4994.05 11.5 6-82 39.2 0.101 0.28 < 0.020 < 0.010 1.20 1.5 Maximum 17.28 5002.15 11.5 6.82 39.4 0.101 1.100 a 0.020 a 0.010 120 1.60 Minimum 9.18 4994.05 5A 6.15 25.8 0.069 0.110 < 0.020 < 0.010 0.068 0.223 Average 12.54 4998.79 8.9 6.49 33.6 0.082 0.411 < 0.020 < 0.010 0.69 1.11 #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 2020 Total Fecal Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Date mg1L umhos mglt mg/L mglt Units MPN MPN MPN Comments 01/30/2020 83 70 2.50 2.58 2 a 1 05/14/2020 55 71.2 1.92 1.56 1 < 1 07/27/2020 83 124 10.8 2.47 1 < 1 11/12/2020 74 121 4.09 355 < 1 a 1 Maximum 83 124 10.6 3.55 2 < 1 Minimum 55 70 1.92 1.56 < 1 < 1 Average fig 97 4.8 2.54 1.3 a 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-21 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER DUALITY DATA From: 2012 To: 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO,-N NO3-N Total N Year ft Level C pH mg[L mg/L NTU mg1L mg1L mg/L mg1L mgJL mg1L 12 13.4 4997.9 10.4 6.13 37.4 2.3 0.031 0.113 0.024 r 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.E 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 r 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 a 0.020 < 0.010 1.428 1.106 Maximum 17.7 5001.4 10.9 6.49 41.5 2.3 0.082 0.411 0.025 0.022 2.970 2.984 Minimum 9.9 4993.6 8.9 5.97 33.6 2.3 0.031 0.063 < 0.020 < 0.010 0.865 0.860 Average 13.4 4998.0 10.1 6.25 37.0 2.3 0.056 0.146 0.021 0.015 1.770 1.745 #Tests 9 9 9 9 9 0 1 9 9 9 9 9 9 Site: ACMW-21 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2012 To: 2020 Total Fecal! Fecal TD5 EC Chloride COD SO4 Color Coll E.ooli Strep Year mg1L umhos mg/L mgJL 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 a 1 20 69 97 4.8 2.54 1 < 1 Maximum 117 169 17.2 5.76 9 1 Minimum 69 97 4.8 2.54 1 < 1 Average 94 132 10.1 4.25 3 1 #Tests 9 9 9 ❑ 9 0 9 9 ❑ Site AC MW-21 Nitrate-Nitrogen &Water Level Chlorides 10 - 5002 50 8 5000 40 4998 4= 6 30 a m 4996 E 4 �, E A 20 4994 3 2 4 992 10 0 4990 0 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 18 19 20 Nitrate t Water Level Linear[Nitrate] --*--Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 0.50 400 0.40 300 — — 0.30 J J c c E 200 E 0.20 100 0-10 0 0.00 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 18 19 20 TES - 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 Sh 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 6/20/2012 5.69 1.57 1.5 11.9 <10 110 al 20 c1 a0.5 al <20 89.4 [0.2 <20 3.08 r5 r2.5 <1 <5 <1 c3 <10 6/11/2013 4.91 1.32 1.23 8.66 7/8/2014 7.09 1.57 1.98 10.1 a0.5 22.1 c1 19.4 r1 <0.5 al c2 29.8 a0.2 <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 al 37.3 <1 r0.5 al r2 <20 c0.2 ¢2 2.91 <5 <0.5 <1 <5 <1 <3 <20 7/27/2016 7.78 1.84 2.20 12.3 r0.5 55 al 23.4 <1 r0.5 <1 <2 27.3 <2 2.95 <5 <0.5 <1 a5 al c3 <20 8/16/2017 8.55 2.02 2.31 12.6 a0.5 <20 al 26.3 c1 c0.5 al c2 <20 c0.2 c2 2.79 <5 <0.5 <1 <5 <1 <3 <20 8/14/2018 13.8 2.26 3.60 14.0 <0.5 <20 al 39 <1 <0.5 <1 <2 <20 <0.2 <2 t2 <5 <0.5 c1 <5 t1 c3 <20 7/18/2019 8.73 1.79 2.27 10.1 a0.5 Q0 al 27.2 <1 r0.5 al 2.39 <20 <0.2 Q 2.64 c5 <0.5 <1 <5 <1 <3 <20 7/27/2020 11.0 1.8 2.80 9.7 50.5 <20 <1 30 <1 <0.5 1.1 <2 <20 <0.2 <2 2.70 c5 ¢0.5 <1 a5 c1 c3 <20 Site: ACMW-22 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Depth Water Temp Alk Hard Turh Total P TKN NH3-N NO,-N NO,N Total N Date ft Level C pH mg1L mg1L NTU mglL mg1L mg1L mglL mglL mg1L 01/30/2020 29.19 4990.09 12.0 6.33 38.5 0.020 0.060 < 0.020 r 0.010 1.12 1.18 05/14/2020 24.00 4995.28 11.1 6.00 36.6 0.018 0.30 < 0.020 r 0.010 0.632 0.93 07/27/2020 25.88 4993.40 11.2 6.45 36.5 0.020 0.22 < 0.020 ¢ 0.010 0.602 0.82 11/12/2020 33.50 4985.78 11.0 6.57 37.0 0.024 < 0.10 < 0.020 < ❑,020 0.597 0.60 Maximum 33.50 4995.28 12.0 6.57 38.5 0.024 0.300 < 0.020 < 0.020 1.12 1.18 Minimum 24.00 4985,78 11.0 6.00 36.5 0.018 0.060 < 0.020 < 0.010 0.60 0.60 Average 28.14 4991.14 11.3 6.34 37.2 0.021 0.170 < 0.020 < 0.013 0.74 0.88 #Tests 4 4 4 4 4 0 0 4 A 4 A 4 4 Site: ACMW-22 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Total Fecal l Fecal TD5 EC Chloride COD SO4 Color Cali E.coli 5trep Date mg1L um has mg/L mglL mg/L Units MPN MPN MPN Comments 01/30/2020 82 96 1.54 2.86 < 1 < 1 05/1412020 70 95.1 1.05 3.20 < 1 < 1 07/27/2020 67 88 1.04 3.34 < 1 < 1 11112/2020 74 92.2 1.17 3.17 9.8 ¢ 1 Maximum 82 96 1.54 3.34 9.8 < 1 Minimum 67 88 1.04 2.86 < 1 a 1 Average 73 93 1.20 3.14 3 < 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: 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO,-N NO,-N Total N Year ft Level C pH mg1L mg1L NTU mg/L mg/L mgJL 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 a 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 5.93 342 0.020 0.103 < 0.020 < 0.015 2.33 2.378 19 26.9 4992.3 11.7 5.14 36.9 0.017 0.090 < 0.020 < 0.01❑ 2.61 2.588 20 28.1 4991.1 11.3 6.34 37.2 0.021 0.170 < 0.020 e 0 013 0.74 0 883 Maximum 33.3 4996.6 13.1 5.34 38.8 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 0.01❑ 0.58 0.646 Average 29.3 4990.0 11.7 6.15 35.9 2.6 0.024 ❑.097 0.022 0.018 196 1.972 #Tests 9 9 9 9 9 0 1 9 9 9 9 9 9 Site: ACMW-22 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2012 To: 2020 Total Feral! Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year m !L umhos m !L m !L m IL 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 Maximum 90 118 4.15 4.10 45 1 Minimum 63 73 1.12 1.68 < 1 < 1 Average 81 104 3.02 2.30 11 1 #Tests 9 9 9 0 9 0 9 9 0 Site AC MW-22 Nitrate-Nitrogen &Water Level Chlorides 10 5000 50 8 4995 40 6 a99a d 30 J � J a) J E y E 4 - - 4985 20 - 3 2 - — — - 4980 10 0 4975 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 18 79 20 t Nitrate +Water Level Linear[NiLrate] Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 0.50 400 0.40 - I 300 0-30 J J cc CD E E 200 020 100 0.10 0 0.00 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 18 19 20 TOS tToral P Annual Metal Report ACMW-22 Fredericksburg Ln Ca K Mg Na Ag AI As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V 2n 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 cl 16.9 al a0.5 cl <20 127 c0.2 <20 <2 r5 <2.5 <1 a5 el <3 <10 6/11/2013 8.95 2.34 1.57 4.66 7/8/2014 10.9 2.57 2.49 5.43 r0.5 <20 <1 27.2 cl <0.5 <1 a2 a20 <0.2 a2 c2 c5 <0.5 al a5 a1 a3 <20 8/18/2015 10.6 2.33 2.49 5.11 c0.5 <20 c1 26.6 c1 c0.5 c1 a2 <20 <0.2 a2 c2 <5 c0.5 c1 c5 c1 c3 <20 7/27/2016 11.3 2.64 2.66 5.60 <0.5 <20 <l 26.4 <l a0.5 <l <2 <20 <2 c2 c5 a0.5 <l c5 <1 c3 <20 8/16/2017 9.64 2.32 2.20 4.96 <0.5 <20 <l 23.6 cl c0.5 cl c2 <20 c0.2 c2 c2 c5 c0.5 <l <5 <l <3 <20 8/14/2018 10.4 2.21 2.30 5.18 <0.5 <20 cl 23.5 <l <0.5 <l <2 <20 <0.2 <2 <2 <5 c0.5 <l <5 <l c3 <20 7/18/2019 12.3 2.68 2.82 5.82 <0.5 444 tl 34.7 <l r0.5 <l <2 0.366 <0.2 11.6 <2 c5 c0.5 <l <5 <l c3 <20 7/27/2020 11.0 2.90 2.90 5.30 <0.5 4300 <l 47.0 <l <0.5 4.0 7.7 3500 <0.2 69 c2 <5 1.3 <l <5 <l 8.9 <20 Site: ACMW-23 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Depth Water Temp Alk Hard Turb Total P TKN NH,N NO2-N NO3-N Total N TD5 Date Ft Level C pH mg1L mg/L NTU mg/L mgJL mg/L mg/L mg/L mg1L mg1 01130/20 19.05 4959.30 14.4 7.32 177 0.034 < 0.050 < 0.020 < 0.010 1,00 1.03 269 05/14/20 17.68 4960.67 14,0 7.25 173 0.035 0.41 < 0-020 < ❑-01❑ 1.01 1.4 265 07/27/20 17.86 4960.49 14.5 7.42 172 0.032 0.31 < 0.020 < ❑.❑10 1.00 1.3 258 11/25/20 18.98 4959.37 14.7 7.44 172 0.037 < 0.10 < 0.020 < 0.030 1.06 1.1 264 Maximum 19.05 4960.67 14.7 7.44 177 0.037 0.410 < 0.020 < 0.030 1.06 1.40 269 Minimum 17.68 4959.30 14.0 7.25 172 0-032 a 0.050 < 0.020 < 0.010 1.00 1.030 258 Average 18.39 4959.96 14.4 7.36 174 0.035 0.218 < 0.020 < 0.015 1.02 1 208 264 #Tests 4 4 4 4 4 0 ❑ 4 4 4 4 4 4 4 Site: ACMW-23 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Total Fecal l Fecal EC Chloride COD SO4 Color Coli E.coll Strep Date umhos mg1L mglL mglL Units MPN MPN MPN Comments 01/30120 372 3.94 19.6 < 1 < 1 05/14/20 393 3.73 19.8 < 1 ¢ 1 07/27/20 375 3.70 19.5 < 1 < 1 11/25/20 372 3.88 18.5 < 1 < 1 Maximum 393 3.94 19.8 t 1 ¢ 1 Minimum 372 3.70 10.5 < 1 < 1 Average 378 3.81 19A < 1 < 1 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-23 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER DUALITY DATA From: 2012 To: 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO,-N NO,-N Total N Year ft Level C pH mg1L mg/L NTU mg1L mg1L mp/L mg1L mg1L m21L 12 18.6 4959.7 15.1 7.39 177 15 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.E 7.34 175 0A00 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 15 17.0 4961.3 15.6 7.29 173 0.031 0.063 < 0.020 < ❑.01❑ 1.02 0.975 17 17.5 4960.8 15.4 7.32 173 0.043 ❑.092 0.021 < ❑.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 r 0.020 = 0.015 1.02 120B Maximum 21.8 4963.E 15.7 7.39 177 16 0.250 0.218 0.026 < 0.017 1.06 1208 Minimum 14.7 4956.6 14.4 7.09 172 16 0.031 0.054 < 0.020 < 0.010 1.00 0.963 Average 18.2 4960.1 15.1 7.29 174 16 0.080 0.088 0.022 < 0.012 1.02 1.050 #Tests 9 9 9 9 9 0 1 9 9 9 9 9 9 Site: ACMW-23 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2012 To: 2020 Total Fecal! Fecal TES EC Chloride COD SO4 Color Cali E.coli Strep Year mglL umhos mg/L mglL mg1L 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 a 1 19 266 381 3.89 19.9 c 1 ¢ 1 20 264 378 3.81 19.4 r 1 r 1 Maximum 273 384 4.33 19.9 9 1 Minimum 262 370 3.81 17.8 1 < 1 Average 268 378 4.11 19.3 2 < 1 #Tests 9 9 9 0 9 0 9 9 0 Site ACMW-23 Nitrate-Nitrogen &Water Level Chlorides 10 4970 50 8 - 4965 40 6 - 4960 m 30 E m E 4 — - 4955 20 2 4950 10 Q 1 4945 0 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 18 19 20 Nitrate t VVa ter Level Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 0-50 400 0-40 300 - - 0.30 Ql Q! E E 200 020 100 0,10 - I 0 0,00 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 18 19 20 TES --t—Tole l P Nitrate-Nitrogen & Water Level 10 4970 $ 1 4965 $ 4969 J � � J 4 4955 2 4950 4945 12 13 14 15 16 17 18 19 20 0— Nitrate f Water Level 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 5e TI V 2n mg/L mg/L mg/L mg/L ug/L ug/I. ug/L ug/L ug/L ug/L ug/I. ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/I. ug/L ug/L 6/20/2012 31.4 4.47 12.6 33.1 a10 582 2.58 90.4 <1 a0.5 1.16 e20 1020 a0.2 e20 2.4 e5 a2.5 al <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 a5 6630 <10 122 <10 a5 <10 20.2 12700 a0.2 220 e20 a50 <5 e10 e50 <10 38.6 <200 8/18/2015 32.7 4.70 13.2 29.3 a0.5 2430 3.54 107 <1 e0.5 3.66 15.2 4990 a0.2 99.3 2.54 e5 0.83 <1 <5 <1 22.4 <20 7/27/2016 30.5 4.63 14.0 31.5 a0.5 1670 2.68 110 al e0.5 3.47 7.54 3610 59.6 2.04 e5 e0.5 el a5 <1 16.4 e20 8/16/2017 31.3 4.44 13.4 31.0 e0.5 2080 3.41 119 c1 e0.5 4.39 9.37 3810 a0.2 74.4 2.28 e5 e0.5 al a5 al 19.5 e20 8/14/2018 32.6 4.27 13.6 32.3 e0.5 832 4.86 101 al e0.5 1.2 11.6 1810 a0.2 33.2 2.27 e5 e0,5 el e5 el 15.2 e20 7/18/2019 31.8 4.45 13.5 32.4 e0.5 1060 2.58 122 el e0.5 1.86 11.4 2.12 c0.2 37.1 2.22 e5 e0.5 al a5 al 14.9 e20 7/27/2020 32.0 4.00 13.0 32,0 e0.5 340 2.00 100 a1 e0.5 1.2 6.7 630 a0.2 14.0 2.22 e5 e0.5 <1 <5 <1 11,0 <20 Site: ACMW-24 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO,-N NO,-N Total N Date ft Level C pH mgtL mg/L NTU mg/L mg/L mg1L mg/L mg/L mg/L 01/30/2020 26.91 4926.34 13.2 6.63 161 0.077 0.110 a 0.020 < 0.010 2.33 2.44 05114/2020 21.20 4932.05 12A 6.63 176 0.071 0.86 a 0.020 < 0.010 2.26 3.1 07/27/2020 24.40 4928.85 12.7 6.73 198 0.071 0.39 < 0.020 < 0.010 1.83 Z2 11/25/2020 25.78 4927.47 13.5 6-81 185 0.076 a 0.10 < 0.020 < 0.030 2.06 2.1 Maximum 25.91 4932.05 13.5 6,81 198 0.077 0.86 a 0.020 a 0.030 2.33 3.10 Minimum 21.20 4926_34 12.4 6-63 161 0.071 0.10 a 0.020 ¢ 0.010 1.83 2.10 Average 24.57 4928,68 13.0 &70 180 0.074 0.365 < 0.020 < 0.015 2.12 2.46 #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 DUALITY DATA 2020 Total Fecal l Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Date mg& umhos mg1L mg/L mg/L Units MPN MPN MPN Comments 01/30/2020 347 525 34.9 47.0 < 1 a 1 05/14/2020 374 622 53.9 42.0 < 1 < 1 07/27/2020 425 697 72.0 40.6 < 1 < 1 11/25/2020 367 623 50_6 39.3 < 1 < 1 Maximum 425 697 72.0 47.0 < 1 < 1 Minimum 347 525 34.9 39.3 < 1 < 1 Average 37B 617 52.9 42.2 < 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: 2020 Depth Water Temp Alit Hard Turb Total P TKN NH,N NO2-N NO3-N Total N Year #t Level C pH m qLL m !L NTU m IL m !L m IL m IL m !L m IL 12 24A 4928.9 13.0 6.64 168 12 0268 0.166 0.028 0.025 2.11 2.298 13 25A 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 2283 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 Maximum 25A 4930.0 14.0 6.70 184 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 24.5 4928.7 13.5 6.55 168 12 0.116 0.145 0.022 0.018 1.95 2.075 #Tests 9 9 9 9 9 0 1 9 9 9 9 9 9 Site: ACMW-24 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2012 To: 2020 Total Fecal l Fecal TD5 EC Chloride GOD SO4 Color Coli E. coli 5trep Year mg1L umhos m91L mg1L 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 64A 36.2 < 1 < 1 19 402 653 67.5 40.0 16 ¢ 1 20 378 617 52.9 422 < 1 < 1 Maximum 427 674 88.5 422 16 3 Minimum 334 523 39A 26.8 e 1 ¢ 1 Average 369 588 58.4 34.2 3 1 #Tests 9 9 9 0 9 0 9 9 0 Site AC MW-24 Nitrate-Nitrogen &Water Level Chlorides 10 100 4938 4933 90 — — s - - -- 4928 80 4923 4918 70 J 6 4913 m 60 w J E 4908 � rn 50 - 4 4903 E 40 4898 4893 30 2 - 20 4888 4883 10 0 4878 0 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 18 19 20 Nitrate —w—Water Level Linear[Nitra(e} +Chloride Total Dissolved Solids [TOS] total Phosphorus 500 0.50 400 a,� - 0.40 300 0.30 J J C E E 200 0.20 - 100 0.10 - - 0 0.00 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 18 19 20 t TES Total P Annual Metal Report ACMW-24 Scott Brooke's Ranch by Irrigation ditch Ca K Mg Na Ag At As Ba Be Cd Cr Cu Fe Hg Mn My Ni Pb 5b 5e TI V 2n 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 a10 719 2.32 121 c1 a0.5 al alp 874 a0.2 89 <2 <5 c2.5 al a5 <1 10.6 a10 6/11/7013 43.8 3.64 18.4 37.9 7/8/2014 52.0 5.12 26.0 42.3 <1 4200 6.38 264 42 al 4.52 6.02 4760 a0.2 181 <4 a10 1.3 c2 <10 a2 23.9 a40 8/18/2015 44.2 3.39 19.1 38.0 a0.5 40.4 1.46 190 al a0.5 a1 a2 180 a0.2 4.56 a2 a5 a0.5 al <5 a1 8.77 a20 7/27/2016 47.6 4.34 21.9 45.2 a0.5 1420 2.09 208 al a0.5 11.3 3.2 1940 67.9 c2 a5 a0.5 al a5 al 13.8 a20 8/16/2017 52.7 4.10 23.5 44.8 r0.5 2110 2.58 228 al a0.5 2.3 3.39 2590 a0.2 8Z.5 a2 a5 0.559 a1 <5 al 15.7 a20 8/14/2018 49.6 3.36 21.8 46.2 a0.5 202 3.66 218 a1 a0.5 al 18 256 a0.2 6.82 a2 a5 a0.5 a1 a5 a1 10.5 a20 7/18/2019 58.4 3.89 25.5 49.7 a0.5 204 1.24 260 al a0.5 al 8.5 0.242 a0.2 9.28 <2 <5 <0.5 <1 a5 a1 9.24 a20 7/27/2020 57.0 3.50 25.0 52.0 <0.5 170 1.5 230 a1 c0.5 c1 14 200 c0.2 7.90 a2 a5 <0.5 a1 a5 al 10.0 <20 Site: ACMW-25 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg1L mg1L NTU mg1L mg1L mg1L mg1L mg1L mglL 01/30/2020 6.60 4933.44 10.2 6,45 48.2 0.046 < 0.050 < 0.020 < 0.010 2.25 2.28 05114/2020 7.29 4934.95 10.6 6.28 48.2 0.048 0.55 a 0.020 < 0.010 1.86 2.4 07/27/2020 9.05 4933.19 14.5 6.47 51.1 0.048 0.36 < 0.020 < 0.010 2.10 2.5 11/12/2020 10.19 4932.05 14-6 6.64 44.7 0.054 < 0.10 a 0.020 < 0.030 2.03 2.0 Maximum 10.19 4934,95 14.6 6.64 51.1 0.054 0.55 = 0.020 < 0 030 2.25 2.50 Minimum 7.29 4932.05 10.2 6.28 44.7 0.046 < 0.050 < 0.020 < 0.010 1.86 2.00 Average 8.83 4933.41 12.5 6-46 48.1 0.050 0.265 < 0.020 4 0 015 2.06 2.30 #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 2020 Total Fecal l Fecal TD5 EC Chloride COD SO4 Color Coli E.soli 5trep Date m IL umhos m IL m /L mgll- Units MPN MPN MPN Comments 01/30/2020 119 153 6.56 6.07 ¢ 1 a 1 05/14/2020 114 158 6.97 5.83 < 1 < 1 07/27/2020 113 162 9.31 5.04 1 < 1 11/12/2020 110 153 8.40 4.73 < 1 < 1 Maximum 119 162 9.3 6.07 1 < 1 Minimum 110 153 6.97 4.73 < 1 < 1 Average 114 157 8.31 5.42 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: 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mglL mg/L NTU mg1L mglL mglL mg1L mg1L m21L 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 < 0.018 150 1553 16 8.7 4933.5 14.0 6.27 45.1 0.043 0.235 < 0.020 < 0.020 359 3.828 17 7.2 4935A 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 12A 629 45.6 0.044 0.113 < 0.020 < 0.010 5.06 4.803 20 8.8 4933.4 12.5 6.46 4&1 0.050 0.265 a 0.020 r 0.015 2.06 2.295 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 8.7 4933.5 13.5 6.32 46.9 0.38 0.051 0.143 0.022 0.021 2.76 2.862 #Tests 9 9 9 9 9 0 1 9 9 9 9 9 9 Site: ACMW-25 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2012 To: 2020 Total Fecal! Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year m IL umhos m IL m 1L m IL Units MPN MPN MPN Comments 12 125 163 9.0 6.46 3 < 1 13 121 159 10A 6.51 1 < 1 14 119 158 10.9 7.23 2 < 1 15 111 150 9.5 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 r 1 19 139 192 12.9 7.52 39 < 1 20 114 157 8.3 5.42 1 < 1 Maximum 139 192 12.9 8.10 39 2 Minimum 111 150 8.0 5.42 a 1 < 1 Average 123 167 10.3 5.53 12 1 A Tests 9 9 9 9 0 9 9 0 Site AC i11 W-25 Nitrate-Nitrogen &Water Level Chlorides 10 - 4950 50 8 — 4945 40 d= 6 4940 m 30 J ro J � J E m � 4 - — 4935 20 2 4930 10 ❑ 4925 0 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 18 19 20 —�Nitrate Water Level Linear(Nitrate) Chloride 1 Total Dissolved Solids(TDS) Total Phosphorus 500 0,50 400 0,40 300 0.30 J J Ql � E E 200 0-20 100 - - - - 0.10 0 1)00 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 18 19 20 TOS - 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 Ma Ni Pb Sb 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 6/20/2012 14.0 3.46 4.24 12 a10 a20 <1 43.2 <1 <0.5 <1 <20 66.4 c0.2 <20 t2 a5 c2.5 cl <5 al <3 a10 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 <l 40.5 <l <0.5 <1 2.36 a20 t0.2 <2 <2 <5 <0.5 c1 <5 c1 3.02 a20 8/18/2015 10.5 2.91 3.72 10.6 <0.5 28.1 <l 33.0 <1 <0.5 <1 <2 20 <0.2 a2 <2 <5 <0.5 cl <5 al <3 <20 7/27/2016 12.9 3.38 4.47 12.1 <0.5 a20 al 39.6 <1 <0.5 <1 <2 a20 c2 <2 <5 <0.5 al <5 <1 <3 <20 8/16/2017 13.5 3.30 4.50 11.7 <0.5 a20 al 42.6 <1 <0.5 1.3 <2 220 a0.2 c2 <2 <5 <0.5 al <5 <1 <3 <20 8/14/2018 13.1 3.23 4.26 12.5 <0.5 <20 <l 38.9 <1 <0.5 <1 <2 <20 <0.2 c2 <2 <5 <0.5 <l <5 <1 <3 a20 7/18/2019 13.5 3.16 4.42 12.2 <0.5 <20 al 50.0 <1 <0.5 <1 <2 <20 <0.2 c2 <2 r5 <0.5 <l <5 <1 3.24 a20 7/27/2020 13.0 3.00 4.20 12.0 a0.5 a20 al 42.0 <1 a0.5 a1 a2 20 a0.2 a2 <2 <5 <0.5 a1 <5 <1 <3 e20 Site: ACMW-26 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date It Level C pH mg/L mglL NTU mg/L mg1L mg1L mg/L mg/L mg/L 01/30/20 13.20 4882.40 9.7 6A1 55.8 0.08 0.156 < 0.020 0.034 1.78 1.97 05/14/20 5.93 4889.67 12.8 6.41 69.8 0.118 1.2 a 0.020 < 0.010 0.070 1.3 07/27/20 10.95 4884.65 13.2 6.58 63.8 0.13 0.53 0.021 0.019 0.093 0.64 11/12/20 16.18 4879.42 11.4 6.63 63.9 0.091 ¢ 0.10 0.028 0.029 0.812 0,84 Maximum 16.18 4889.67 13.2 6.63 69.8 0.130 1.20 0.028 0.034 1.78 197 Minimum 5.93 4879,42 9.7 6.41 55.8 0.080 ¢ 0.10 ¢ 0.020 ¢ 0.010 0.070 0.640 Average 11.57 4884,04 11.8 6.51 63.3 0.105 0.497 0.022 0.023 0.689 1.188 #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 2020 Total Fecal Fecal TES EC Chloride COI] SO4 Color Coli E. coli Strep Date mg1L umhos mg/L mg/L m211- Units MPN MPN MPN Comments 01/30/20 149 211 21.3 8.00 20.3 < 1 05114/20 129 197 13.0 3.09 62 9.7 07/27/20 115 153 5.89 2.92 1 ¢ 1 11/12/20 132 223 18.7 5.97 < 1 < 1 Maximum 149 223 21.3 8.0 62 9.7 Minimum 115 153 5.9 2.92 < 1 ¢ 1 Average 131 196 14.7 5.00 21.1 3.2 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-26 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER DUALITY DATA From: 2012 To: 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO,-N NO3-N Total N Year ft Level C pH mg1L mg1L NTU mg1L mg1L mg1L mg1L mg1L m21L 12 11 A 4884.2 12.4 6.36 62.6 1.0 0.095 0.153 0.023 0 031 1296 1.481 13 12.7 4882.9 13.4 6.38 65A 0.107 0.229 ❑.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 48832 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 a 0.022 0.023 0.689 1.188 Maximum 14.1 4887.8 14.1 6.60 74.1 1.0 0.205 0.547 0.048 0.036 3.533 3.675 Minimum 7.8 4881.5 11.0 6.19 57.4 1.0 0.079 0.146 < 0.020 < 0.015 0.420 0.682 Average 11.6 4884.0 12.7 6.40 63.5 1.0 0.117 0.280 0.025 0.026 1.329 1.670 #Tests 9 9 9 9 9 0 1 9 9 9 9 9 9 Site: ACMW-26 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER DUALITY DATA From 1989 To: 2020 Total Fecal l Fecal TES EC Chloride CO❑ SO4 Color Coli E. coli Strep Year mg1L umhos m IL m IL m lL 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 1❑.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 Maximum 164 254 24.1 15.17 179 7 Minimum 131 196 14.7 4.96 4 1 Average 148 219 18.8 7.97 35 3 #Tests 9 9 9 ❑ 9 0 9 9 ❑ Site ACNIW-26 Nitrate-Nitrogen &Water Level Chlorides 10 -- 4895 50 8 4890 40 fi - 4885 30 J � J J E r E 4 4880 20 2 - — 4875 10 0 L 4870 0 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 18 19 20 Nitrate +Water Level Linear(N Irate) Chloride Total ❑issolved Solids(TDS) Total Phosphorus 500 0.50 400 0.40 - 300 0.30 J J Ql � E E 200 020 100 0.10 - 0 MO 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 18 19 20 +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 5b 5e TI V 2n 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 a0.5 <1 <20 54 c0.2 25.9 <2 r5 a2.5 c1 a5 <1 3.16 <10 6/11/2016 12.9 4.25 3.43 19.3 7/8/2014 19.5 5.42 5.57 27.3 a0.5 a20 <1 58.0 <1 <0.5 <1 4.72 26.6 a0.2 80 1.99 <5 <0.5 c1 a5 <1 4.2 <20 8/18/2015 14.0 4.03 4.28 20.3 <0.5 24.6 al 51.2 c1 c0.5 <1 a2 24.8 a0.2 20.7 <2 r5 a0.5 c1 a5 <1 <3 <20 7/27/2016 15.0 5.76 4.51 21.0 <0.5 a20 c1 44.7 <1 a0.5 r1 3.27 <20 89.4 3.85 c5 a0.5 <1 a5 [1 5.03 <20 8/16/2017 19.4 6.70 5.49 23.9 a0.5 27.9 1.24 69.3 c1 a0.5 <1 2.35 39.9 a0.2 113 2.87 a5 a0.5 c1 a5 <1 11.6 e20 8/14/2018 11.9 4.15 3.52 19.2 a0.5 a20 al 39.5 a1 a0.5 <1 2.73 21.5 c0.2 213 3.32 r5 �0.5 <1 <5 a1 3.03 <20 7/18/2019 14.3 6.33 4.12 21.0 <0.5 a20 al 60.0 a1 a0.5 <1 4.05 48.9 c0.2 129 3.12 e5 <0.5 <1 a5 <1 5.28 <20 7/27/2020 11.0 3.60 3.10 16.0 c0.5 <20 c1 35 <1 r0.5 c1 2.50 23.0 a0.2 64.0 2.6 t5 a0.5 <1 a5 <1 i3 <20 DIAMOND VALLEY RANCH MONITORING WELLS Site: ACMW-08N SOUTH TAHOE PUBLIC UTILITY DISTRICT _PINE COUNTY GROUNDWATER QUALITY DA1 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date fl Level C pH mg1L mg1L NTU mg1L mglL mg1L mg1L mg1L mg1L mg1L 02/11/20 4.71 5459.74 11.2 6.64 81.0 0.042 < 0.050 < 0.020 < 0.010 0.561 0.520 111 05/27/20 3.0 5461.45 12.2 6.73 79.1 0.042 a 0.10 < 0.020 r 0A10 0.652 0.65 115 08/08/20 2.64 5461.81 12.7 6.96 80.3 0.045 0.11 ¢ 0.020 < 0.010 0.640 0.75 112 11/09/20 4.76 5459.69 11.7 6.69 80.0 0.040 < 0.10 < 0.020 < 0.010 0.641 0.64 128 Maximum 4.76 5461.81 12.7 6.96 81.0 0.045 0.110 < 0.020 < 0.010 0.652 0.750 128 Minimum 2.64 5459.69 11.2 6.64 79.1 0.040 < 0.050 < 0.020 < 0.010 0.561 0.520 111 Average 3.78 5460.67 12.0 6.76 80.1 0.042 0.090 < 0.020 < 0.010 0.624 0.640 117 ##Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACIVIW-08N SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Total Coli E.coli Fecal EC Chloride COD SO4 Color Chromo Chromo Strep Date umhos m IL m L IL Units MPN MPN MPN Comments 02/11120 149 1.33 0.909 1.0 ¢ 1 05/27/20 155 1.67 1.07 < 1 ¢ 1 08/08/20 170 1.45 0.961 1.0 1.0 11/09/20 148 1.55 0.895 < 1 ¢ 1 Maximum 170 1.67 1.07 1 1 Minimum 148 1.33 0.90 < 1 < 1 Average 156 1.50 0.96 1.0 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: 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO,-N NO,N Total N Year ft Level C pH mg1L mg/L NTU mg/L mg1L mglt_ mg1L mg1L mg1L 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 c 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 5458.2 122 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 12A 6.75 84 0.041 < 0.296 < 0.020 < 0200 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 a 0.020 < 0.010 0.624 0.640 Maximum 7.9 5461.4 12.5 7.02 84 53 0.22 0.052 0296 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 5.0 5459.5 12.1 6.80 78 53 0.11 0.043 0.089 0.021 < 0.026 0.618 0.641 #Tests 12 12 12 12 12 1 3 12 12 9 12 12 12 Site: ACMW-08N SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2020 Tolal Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg1L umhos mg1L m2�1- mglL Units MPN MPN MPN Comments 09 106 142 5.46 6 1.00 3,5 a 1 First year of sampling 10 110 170 3.35 1.25 2.5 < 1 11 120 164 0.T7 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 14T.4 < 1 16 124 152 1.16 1.07 4.4 < 1 17 126 168 1.20 1.06 262.3 t 1 18 125 174 1.36 1.43 11 T,9 c 1 19 121 160 1.42 1.13 12A 6.1 20 117 156 1.50 0.96 1.0 1.0 Maximum 130 174 5.46 6 1.80 262.3 6.1 Minimum 106 142 0.77 < 6 0.96 < 1.0 ¢ 1.0 Average 119 162 1.67 6 1.24 49.0 < 1.4 #Tests 12 12 12 1 12 ❑ 12 12 ❑ Site ACMW-08N Nitrate-Nitrogen &Water Level Chlorides 5 5475 40 4 5470 30 r 3 - — 5465 d J � � J J E E 20 2 5460 3 1 5455 10 0 5450 0 O9 10 11 12 13 74 15 16 17 18 19 20 09 10 11 12 13 14 15 16 17 18 19 20 Nitrato ---w—Water Level Chloride Linear(Chloride) Total Dissolved Solids(TDS) Total Phosphorus 500 0.4 400 0-3 300 J_ J m 0.2 - 200 4.1 100 — 0 0.0 09 10 11 12 13 14 15 16 17 13 19 20 09 10 11 12 13 14 15 16 17 18 19 20 TQS Linear JDS] - ToWl 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 MC Ni Pb Sb Se TI V 2n mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ag/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 6/18/20013 13.7 1.50 4.10 9.0 17.2 a20 a2 39 c1 c0.5 el e20 43.5 a0.2 <20 <2 a5 <2.5 <1 a5 <1 e3 e10 8/10/2010 15.0 1.60 5.00 9.5 <0.5 <20 <1 34 <1 c0.5 c1 c2 <20 a0.2 a2 [2 <5 <0.5 <1 <5 <1 c3 <20 7/13/2011 16.7 1.86 5.80 10.8 <0.5 a20 al 37 <1 c0.5 c1 c2 e20 <0.2 a2 <2 e5 <0.5 al a5 <1 e3 <20 7/26/2012 15.6 1.88 5.34 10.2 <10 <20 al 36.2 <1 c0.5 c1 <20 <50 a0.2 e20 [2 <5 <2.5 a1 a5 <1 c3 <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 e20 <1 38.2 el e0.5 <1 e2 a20 a0.2 a2 Q e5 e0.5 e1 e5 e1 e3 e20 8/19/2015 14.8 1.64 5.25 9.8 a0.5 a20 al 36.6 c1 c0.5 al e2 <20 e0.2 a2 <2 e5 <0.5 a1 a5 <1 e3 e20 8/10/2016 14.8 1.70 5.21 9.8 a0.5 a20 al 33.8 c1 c0.5 al a2 <20 a0.2 e2 <2 <5 <0.5 <1 a5 c1 a3 <20 7/27/2017 15.7 1.76 5.37 10.1 a0.5 <ZO el 41.2 el <0.5 <1 Q a20 e0.2 e2 a2 c5 a0.5 <1 e5 e1 <3 e20 8/29/2019 16.7 1.58 5.58 10.6 a0.5 e20 al 40 <1 e0.5 <1 <2 a20 e0.2 <2 <2 .45 <0.5 c1 a5 c1 e3 <20 8/14/2019 16.8 1.63 5.47 10.4 <0.5 <20 al 39.4 c1 c0.5 c1 <2 <20 a0.2 c2 <2 <5 <0.5 al <5 al <3 <20 8/8/2020 15.7 1.41 5.27 9.72 <0.5 <70 el 39.6 el e0.5 el r2 e20 <0.2 e2 e2 a5 a0.5 c1 a5 c1 e3 57.3 Site: ACMW-09D SOUTH TAHOE PUBLIC UTILITY DISTRICT .LPINE COUNTY GROUNDWATER DUALITY DAT 2020 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 2/20/2020 33.54 5477,02 11.7 6.57 34.4 2.1 0.050 c 0.050 < 0.020 < 0.020 0.759 0.702 82 6/13/2020 21.00 5489.56 13.2 6.48 30.8 0.065 0.25 < 0.020 < 0.01❑ 0.914 1.2 74 8/20/2020 31.56 5479,00 13.7 6.74 31.9 0.057 0.17 < 0.020 ¢ 0.010 0.890 1.1 76 12/16/2020 35.01 5475,55 11.3 6.71 32.3 0.064 c 0.10 < 0.020 < 0.020 0.918 0.92 75 Maximum 35.01 5489.56 13.7 6.74 34A 2.1 0.065 0.250 < 0.020 < 0.020 0.918 120 82 Minimum 21.00 5475.55 11.3 6.48 30.8 2.1 0.050 < 0.050 ¢ 0.020 < 0.010 0.759 0.702 74 Average 30.28 5480.28 12.5 6.63 32.4 2.1 0.059 0.143 ¢ 0.020 c 0.015 0.870 0.98 77 #Tests 4 4 4 4 4 0 1 4 4 4 4 4 4 4 Site: ACMW-09D SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Total Cali E.coh Feca! EC Chloride COD SO4 Color Chromo Chrome Strep Date umhas m /L m 1L m /L Units MPN MPN MPN Comments 2/20/2020 79.0 1.33 2.20 a 1 ¢ 1 6/13/2020 75.3 1.19 2.11 < 1 c 1 8/20/2020 77.3 1.23 1.94 ¢ 1 < 1 12/16/2020 83.2 1.42 2.39 ¢ 1 < 1 Maximum 83.2 1.42 2.39 < 1.0 < 1.0 Minimum 75.3 1.19 1.94 ¢ 1.0 < 1.0 Average 78.7 1.29 2.16 ¢ 1.0 < 1.0 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-09D SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER DUALITY DATA From: 2009 To: 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year R Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mglL 09 27.4 5483.2 13.1 6.37 32 25 4.43 0.059 0.052 < 0.010 0.865 0.808 1❑ 30.1 5478.7 12.9 6.22 33 0.058 ¢ 0.050 < 0.01❑ 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 ¢ 0.01❑ 0.968 0.798 17 24.6 54H6.0 12.8 6.43 32 0.052 0.155 0.024 c 0.045 3.083 3.080 18 32.1 5478.4 12.6 6.17 32 0.058 0.070 0.065 r 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 Maximum 38.7 5486.0 13.3 6.68 34 25 4.43 OA 07 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 5478.5 12.8 6.39 32 25 2.24 0.063 0.104 0.026 ¢ 0.015 1.099 1.122 #Tests 12 12 12 12 12 1 4 12 12 9 12 12 12 Site: ACMW-09D SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER DUALITY DA From 1909 To: 2020 Total Fecal TDS EC Chloride COD SO4 Color Coli E coli 5trep Year mg/L umhos mg/L mg/L mglL 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 c 1.0 16 83 79 1.48 3.45 130.1 c 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 Maximum 95 97 1.62 5 157 176.8 2.8 Minimum 77 76 1.28 < 5 2.16 ¢ 1.0 < 1.0 Average 83 81 1.43 5 2.94 32.1 1.3 #Tests 12 12 12 1 12 0 12 12 0 Site ACMW-09D Nitrate-Nitrogen &Water Level Chlorides 5 5495 50 4 5490 40 5485 3 m 30 - � � J 5480 pt 2 - � E20 5475 1 — — 5470 10 0 5465 0 09 10 11 12 13 14 15 1fi 17 18 19 20 09 10 11 12 13 14 15 16 17 18 19 20 Nitrate +Water Level Linear(Nitrate) Chloride Linear(Chloride) Total Dissolved Solids(TDS) Total Phosphorus 500 OA 400 0.3 300 - 10 -6 0.2 200 1 0.1 00 0 0.0 09 10 11 12 13 14 15 16 17 16 19 20 09 10 11 12 13 14 15 16 17 16 19 20 Toy Linear(TOS) Total P Linear(Total P) Annual Metal Report ACMW-09D Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn My Ni Pb 5b 5e TI V 2n 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 c1 a0.5 <1 a20 632 a0.2 <20 c2 a5 t2.5 <1 <5 <1 <3 14.5 7/8/2010 7.30 <1 2.00 6.80 <0.5 570 <1 28 al c0.5 <1 c2 690 <0.2 14 a2 a5 0.54 ai c5 c1 a3 d0 7/13/2011 6.85 1 1.78 7.89 <0.5 132 <1 23.4 <1 a0.5 <1 c2 85.1 a0.2 <2 <2 <5 <0.5 <1 a5 <1 c3 a20 7/26/2012 6.16 0.91 1.17 7.54 a10 79.6 [1 21.3 <1 <0.5 <1 <20 170 <0.2 <20 c2 <5 <2.5 <1 <5 <1 <3 <10 8/1/2014 6.34 a1 1.74 7.15 <0.5 105 1.74 21.2 <1 <0.5 <1 <2 296 <0.2 5.62 a2 a5 <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 a0.5 <1 <2 231 c0.2 a2 <2 <5 <0.5 <1 a5 <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 a2 <2 <5 0.619 <1 <5 <1 <3 a20 6/8/2017 7.85 c1 2.17 7.11 <0.5 106 c1 24.4 <1 <0.5 <1 <2 46.1 <0.2 <2 <2 a5 <0.5 <1 <5 <1 <3 <20 9/18/2019 6.56 <1 1.68 7.94 <0.5 203 a1 18 <1 c0,5 <1 <2 241 <0.2 <2 <2 e5 t0.5 <1 t5 t1 6/6/2019 6.43 <1.0 1.63 7.35 <0.5 124 a1 17.8 <1 <0.5 <1 <2 125 c0.2 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 a0.5 <1 <2 242 a0.2 5.20 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-10 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Depth Water Temp Alk Hard Turb Total P TKN NH,N NO2-N NQ N Total N Date ft Level C pH mg1L mg1L NTU mg1L mg/L mg/L mg/L mg1L mg/L 2/200020 32.00 5502.19 11.8 6.38 76.4 0.5 0.038 < 0.050 < 0.020 < 0.020 0.761 0.707 6/13/2020 20.94 5513.25 12.3 6A4 84.5 0.043 0.27 < 0.020 < 0.010 0.708 0.98 8/20/2020 26.81 5507.38 13.3 6.63 64.8 0.037 0.22 < 0.020 < 0.010 1.41 1.6 12/16/2020 28.11 5506.08 10.8 &58 66.8 0.044 < 0.10 < 0.020 ¢ 0.020 1.17 1.2 Maximum 32.00 5513.25 13.3 6.63 84.5 0.5 0.044 0.270 < 0.020 < 0.020 1.410 1.60 Minimum 20.94 5502.19 10.8 6.38 64.8 0.5 0.037 a 0.050 a 0.020 a 0.010 0.708 0.707 Average 26.97 5507.23 12.1 6.51 73.1 0.5 0.041 0.160 < 0.020 < 0.015 1.012 1.122 #Tests 4 4 4 4 4 0 1 4 4 4 4 4 4 Site: ACMW-10 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER DUALITY DATA 2020 Total Coli E. coli Fecal TDS EC Chloride COD SO4 Color Chrom❑ Chmm❑ Strep Date mglL umhos mg1L mR/L mglL Units MPN MPN MPN Comments 2120/2020 134 175 5.43 4.55 a 1 a 1 6113/2020 128 188 4.13 3.63 a 1 a 1 8/2012020 114 163 4.69 4.81 a 1 a 1 12/16/2020 123 174 4.93 4.89 a 1 < 1 Maximum 134 188 5.43 4.89 a 1 < 1 Minimum 114 163 4.13 3,63 a 1 < 1 Average 125 175 4.80 4.47 r 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: 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO,-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mglL mg/L mall- mg/L mg/L 09 26.1 5508A 11.8 6.46 113 100 1.51 0.044 ¢ 0.050 a 0.010 0.141 0.171 10 25.7 5505.9 12.1 6.39 97 0.046 < 0.050 < 0.01❑ 0.148 0.198 11 30.0 5504.2 10.8 6.52 85 0.044 < 0.050 < 0.01❑ 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 A 5502.8 12.0 6A3 82 0.035 0.056 < 0.020 < 0,010 0.150 0.156 14 30.7 5503A 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 < ❑.01❑ 0.260 0.257 16 29.1 5505.1 12.8 6.34 74 0.039 < 0.078 < 0.020 < ❑.01❑ 0.798 0.784 17 26.2 5508.0 12.3 6.55 77 0.040 < 0.080 0.022 r 0.010 0.442 0.377 18 29A 5504.7 12.6 6.28 77 0.039 < 0.091 0.020 ¢ 0.008 0.461 0.495 19 23.9 5510.3 12A 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 Maximum 34.3 5510.3 13.1 6.55 113 100 1.51 0.212 0.293 0.030 < 0.015 1.012 1.122 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 5505.0 12.3 6.43 83 100 1.07 0.054 0.096 0.021 < 0.010 0.385 0.435 #Tests 12 12 12 12 12 1 3 12 12 9 12 12 12 Site: ACMW-10 SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER DUALITY DA From 1989 To: 2020 Total Fecal TES EC Chloride COD SO4 Color Coli E.coli Strep Year mg1L umhos mg1L mg1L mg1L 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 c 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 4.51 135 ¢ 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 c 1.0 < 1,0 20 125 175 4.80 4.47 < 1.0 < 1.0 Maximum 162 248 5.28 < 5 4.62 < 2.4 < 1.0 Minimum 114 159 4,03 c 5 2.31 < 1.0 < 1.0 Average 133 189 4.69 ¢ 5 3.55 r 1.1 < 1.0 9 Tests 12 12 12 1 12 0 12 12 0 Site ACMW-10 Nitrate-Nitrogen&Water Level Chlorides 1.2 5515 50 1.0 5510 40 0.8 r 5505 y 30 - — - a E E 5500 20 — 0.4 - 0 2 5495 10 — — — 0.0 5490 0 09 10 11 12 13 14 15 16 17 1s 19 20 09 10 11 12 13 14 15 16 17 18 10 20 9-Nitrate +Water Level Linear(Nitrate) Chloride Total Dissolved Solids(TDS) Total Phosphorus 500 0.4 400 0.3 300 J J m ao 0.2 £ 200 E 0.1 100 0 0.0 09 10 11 12 13 14 15 16 17 18 19 20 09 10 11 12 13 14 15 16 17 18 19 20 ---a—TES Linear(TD5) - 6 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 5h 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 6/18/2009 35.1 1.46 7.51 10.4 21.5 130 a2 31 al a0.5 a5 a20 137 a0.2 <20 2.9 a5 c2.5 ai c5 al a3 <10 7/8/2010 24.0 <1 6.40 7.50 <0.5 330 <1 27 <1 a0.5 <1 a2 580 <0.2 20 <2 <5 <0.5 <1 <5 <1 a3 a20 7/26/2012 20.4 1.22 6.05 9.11 <10 324 <1 34.7 <1 t0.5 <1 <20 135 <0.2 <20 a2 <5 <1 <5 <1 c3 a10 8/1/2014 18.8 1.16 5.30 8.58 <0.5 d0 <1 30 <1 a0.5 cl c2 24.1 <0.2 2.71 <2 <5 <0.5 <1 <5 <1 a3 <20 6/11/2015 16.5 <1 4.84 7.88 <0.5 a20 a1 30.7 <1 a0.5 <1 t2 a20 <0.2 a2 c2 a5 <0.5 al <5 <1 <3 a20 8/16/2016 17.1 <1 5.08 7.62 <0.5 51.2 <1 26.9 <1 <0.5 <1 Q 85 <0.2 3.2 <2 <5 <0.5 <1 <5 <1 e3 <20 6/8/2017 17.9 <1 5.67 6.89 <0.5 827 <1 32.4 <1 <0.5 <1 Q 1320 a0.2 35.7 Q <5 <0.5 c1 <5 c1 3.9 <20 9/18/201B 19.6 <1 5.49 8.28 <0.5 <20 al 33.4 <1 <0.5 <1 <2 <20 <0.2 4.1 <2 <5 <0.5 <1 a5 <1 6/6/2019 18.9 a1.0 5.55 7.87 c0.5 440 <1 31.7 <1 <0.5 <1 Q 609 <0.2 18.8 Q <5 <0.5 <1 <5 <1 <3 <20 6/13/2020 21.3 a1.0 5.85 8.63 <0.5 128 <1 38.9 <1 <0.5 <1 Q 215 <0.2 7.45 Q a5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT kLPINE COUNTY GROUNDWATER QUALITY DAT, 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO,-N NO3-N Total N TD5 Date ft Level C pH mg1L mglL NTU mq/L mall- mq/L mgll- mglL mg1L mglL 2/20/2020 22.10 5480.91 10.1 6.28 29.7 2.1 0.024 < 0.050 < 0.020 ¢ 0.010 3.28 3.23 87 6/13/2020 11.61 5491 A 11.5 6.25 39.2 0.026 0.17 < 0.020 ¢ 0.010 1.19 1.4 73 8/20/2020 18.59 5484.42 14.3 9.29 40.4 0.024 < 0.10 ¢ 0.020 < 0.010 0.706 0.71 77 12/16/2020 20.74 5482.27 12.3 6.37 36.1 0.022 < ❑.1❑ < 0.020 < 0.010 0.726 0.73 72 Maximum 22.10 5491.40 14.3 9.29 40.4 2.1 0.026 0.17 < 0.020 < 0A10 3.28 3.23 87 Minimum 11.61 5480.91 10.1 6.25 29.7 2.1 0.022 < 0.050 ¢ 0.020 < 0.010 0.706 0.710 72 Average 18.26 5484.75 12.1 7.05 36A 2.1 0.024 < 0.105 < 0.020 < 0.010 1.48 1.52 77 #Tests 4 4 4 4 4 ❑ 1 4 4 4 4 4 4 4 Site: ACMW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Total Coli E. coli Fecal EC Chloride COD SO4 Color Chromo Chromo Strep Date umhos mglL mg1L mg1L Units MPN MPN MPN Comments 2/20/2020 105 1.99 5.28 < 1 < 1 6/13/2020 105 2.28 4.83 c 1 ¢ 1 8120/2020 98.4 2.00 4.48 c 1 < 1 12/16/2020 95.1 1.46 4.46 < 1 a 1 Maximum 105 2.28 5.28 a 1 a 1 Minimum 95.1 1.46 4.46 ¢ 1 ¢ 1 Average 101 1.93 4.76 ¢ 1 < 1 #Tesls 4 4 0 4 0 4 4 0 Site: ACMW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER DUALITY DATA From: 2009 To: 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg& mg/L NTU mg1L mg/L mg/L mg/L mg1L mg1L 09 19.6 5485.4 11 A 6.10 40 36 1.23 0.026 < 0.050 ¢ 0.010 0.258 0.290 10 17.2 5483.6 11 A 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 OAK < 0.025 2.773 2.873 15 24.9 5478.1 9.7 6.29 28 0.018 0.050 a 0.020 < 0.020 1278 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 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 20.5 5482.5 11.6 6,28 33 36 2.11 0.031 0.154 0.022 0.015 1.508 1.560 #Tests 12 12 12 12 12 1 4 12 12 9 12 12 12 Site: ACMW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2020 Total Fecal TES EC Chloride COD SO4 Color Coli E. coli Strep Year mglL umhos mglL mg1L MIL 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 c 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 r 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 r 1.0 19 78 112 2.93 5.57 < 1.0 ¢ 1.0 20 77 101 1.93 4.76 < 1.0 r 1.0 Maximum 140 138 3.17 5 5.57 1.0 < 1.0 Minimum 63 79 1.45 a 5 1.85 < 1.0 < 1.0 Average 77 94 2.06 5 3.60 < 1.0 < 1.0 #Tests 12 12 12 1 12 0 12 12 0 Site ACMW-11 Nitrate-Nitrogen &Water Level Chlorides 5 5495 50 4 5490 40 - r 3 5485 a 30 J a J E a E 2 — 5480 20 - 1 - 5475 10 0 5470 0 09 10 11 12 13 14 15 16 17 18 19 20 09 10 11 12 13 14 15 16 17 18 19 20 Nitrate t Water Level Linear(Nitrate) Chloride Linear(Chloride) Total Dissolved Solids [TDS] Total Phosphorus 500 0.4 400 U 300 J J Ql 6 01 E E 200 0.1 100 0 0.0 09 10 11 12 13 14 15 16 17 18 19 20 09 10 11 12 13 14 15 16 17 18 19 20 —�TDS Linear(TD5) 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 5b 5e TI V 2n 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 a0.5 <20 c2 25 ¢1 ¢0.5 a1 a2 <50 a0.2 ¢2 a2 e5 a0.5 el a5 <1 <3 <20 7/8/2010 7.70 1.30 2.40 4.40 a0.5 600 ai 29 <1 a0.5 a1 a2 840 a0.2 19 a2 c5 a0.5 el e5 [1 <3 <20 7/13/2011 8.64 1.25 2.58 4.67 <0.5 258 <1 27.2 a1 a0.5 <1 a2 210 e0.2 6.52 <2 r5 a0.5 a1 c5 el e3 e20 7/26/2012 7.27 1.28 1.92 4.50 e10 49.8 al 21.6 <1 a0.5 <1 <20 80.5 e0.2 e20 e2 e5 a2.5 a1 c5 el e3 e10 8/1/2014 12.1 1.78 3.39 6.54 e0.5 a20 al 39.8 el e0.5 al a2 <20 a0.2 c2 e2 e5 e0.5 el e5 el a3 <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 a0.2 4.4 a2 c5 e0.5 [1 a5 <1 <3 a20 8/16/2016 6.20 1.28 1.77 4.91 a0.5 145 c1 20.7 <1 a0.5 <1 <2 123 a0.2 3.19 a2 c5 a0.5 <1 e5 el <3 <20 6/8/2017 7.07 1.02 2.14 4.07 a0.5 30.4 ei 21.6 <1 e0.5 a1 a2 d0 e0.2 e2 e2 e5 a0.5 a1 c5 el e3 e20 9/18/2018 10.6 1.16 2.98 5.42 <0.5 148 <1 34.1 <1 a0.5 <1 a2 163 a0.2 5.06 [2 <5 <0.5 <1 c5 <1 6/6/2019 7.23 a1.0 2.01 4.39 a0.5 26.2 al 19.7 el e0.5 <1 a2 QO a0.2 a2 a2 e5 e0.5 el e5 e1 e3 a20 6/13/2020 10.9 1.08 2.96 5.49 a0.5 122 ai 31.6 <1 a0.5 <1 a2 99.0 c0.2 4.22 <2 <5 <0.5 <1 a5 a1 a3 <20 Site: ACMW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT .LPINE COUNTY GROUNDWATER QUALITY DAT 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TD5 Date ft Level C pH_ mgJL mg/L NTU mg/L mg/L mg/L mg1L mg1L mg1L mg/L 2111/2020 32.21 5492.83 10.9 6.45 47.2 0.035 < 0.050 ¢ 0.020 ¢ 0.010 0.406 0.398 54 5/27/2020 24.28 5500.76 11.6 6.6 46.3 0.034 < 0.10 c 0.020 < 0.010 0.48 0.48 88 8/812020 30.69 5494.35 12.9 6.78 46.4 0.035 < 0.10 r 0.020 < 0.010 0.483 0.48 77 11/12/2020 33.52 5491.52 11.3 7.02 46.4 0.03 < 0.10 < 0.020 < 0.010 0.509 0.51 91 Maximum 33.52 5500.76 12.9 7.02 47.2 0.035 0.095 r 0.020 -� 0.010 0.509 0.510 91 Minimum 24.28 5491.52 10.9 6.45 46.3 0.030 < 0.050 < 0.020 < 0.010 0.406 0.398 54 Average 30.18 5494.87 11.7 6.71 46.6 0.034 0.088 < 0.020 < 0.010 0.470 0.467 78 #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 2020 Total Coli E. coli Fecal EC Chloride COD SO4 Color Chromo Chromo Strep Date umhos m IL mqjL m lL Units MPN MPN MPN Comments 2/11/2020 109 1.53 2.22 r 1 < 1 5/2712020 98 1.9 2.52 < 1 < 1 8/8/2020 106 1.82 2.37 < 1 < 1 11/12/2020 108 1.82 2.28 a 1 < 1 Maximum 109 1.90 2.52 < 1 < 1 Minimum 98 1.53 2.22 ¢ 1 < 1 Average 105 1.77 2.35 < 1 < 1 #Tests 4 4 0 4 ❑ 4 4 ❑ Site: ACMW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2009 To: 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO,-N NO,-N Total N Year ft Level C pH mg/L mg1L NTU mg/L mg1L mg/L mg/L mg/L mg1L 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 12A 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 r 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 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 47 60 0.04 0.032 < 0.050 0.020 ¢ 0.010 0.353 0.293 Average 30.4 5494.4 11.7 6.71 52 60 0.18 0.038 < 0-080 0.021 r 0.010 0.535 0.569 #Tests 12 12 12 12 12 1 3 12 12 9 12 12 12 Site: ACMW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 2009 To: 2020 Total Fecal TDS EC Chloride COD SO4 Color Coll E. coli Strep Year mgfL umhos mglL mglL m2l Units MPN MPN MPN Comments 09 114 142 1.89 7 4.26 < 1.0 r 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 a 1.0 r 1.0 16 104 ill 1.70 2.85 < 1.0 ¢ 1.0 17 96 106 1.65 2.58 < 1 A c 1.0 18 96 107 1.65 2.85 < 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 Maximum 114 142 1.89 7 4.26 < 1.0 ¢ 1.0 Minimum 78 105 1.48 7 2.35 < 1.0 ¢ 1.0 Average 100 118 1.64 7 3.03 < 1.0 < 1.0 #Tests 12 12 12 1 12 ❑ 12 12 0 Site AC Milli-12 Nitrate-Nitrogen &Water Level Chlorides 5 5505 50 4 - 5500 40 3 — 5495 ro 30 J m J O1 J m E m E 2 5490 20 — — 7 — 5485 10 — — 0 5480 0 09 10 11 12 13 14 15 16 17 18 19 20 09 10 11 12 13 14 15 16 17 18 19 20 Nitrate T Water Level Li nee r{Nitrate} t Chlonde Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 0.3 300 - J J E 0.2 - 200 — 0-1 100 - - 0 0.0 09 10 11 12 13 14 15 16 17 18 19 20 09 10 11 12 13 14 15 16 17 18 19 20 TOS t Total P Annual Metal Report ACMW-12 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Ng Mn MO Ni Pb Sb Se TI V 2n 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 c2 21 c1 c0.5 al a20 81.7 [0.2 <20 a2 c5 c2.5 <1 r5 <1 <3 <10 7/8/2010 16.0 1.40 4.00 4.90 a0.5 a20 <1 21 <1 <0.5 <1 <2 <20 a0.2 a2 r2 a5 <0.5 c1 <5 <1 a3 <20 7/13/2011 15.0 1.56 3.81 4.79 r0.5 <20 al 19.2 c1 a0.5 c1 c2 <20 a0.2 c2 c2 c5 c0.5 c1 c5 <1 c3 a20 7/26/2012 12.9 1.51 3.27 4.56 <10 <20 c1 19.4 c1 [0.5 [1 <20 a50 a0.2 a20 r2 c5 e2.5 c1 [5 c1 c3 <10 7/10/2013 13.0 1.37 3.25 4.46 7/9/2014 13.5 1.59 3.66 4.82 c0.5 <20 al 23 <1 c0.5 [1 <2 <20 a0.2 c2 c2 c5 a0.5 c1 e5 <1 [3 a20 8/19/2015 12.7 1.28 3.62 4.58 c0.5 <20 <1 22.1 <1 c0.5 <1 c2 <20 c0.2 a2 <2 c5 a0.5 <1 c5 <1 <3 <20 8/10/2016 12.1 1.32 3.52 4.52 <0.5 <20 al 22.3 <1 <0.5 <1 <2 a20 c0.2 c2 r2 c5 c0.5 c1 <5 <1 <3 <20 7/27/2017 11.0 1.27 3.15 4.12 c0.5 <20 c1 20.8 c1 c0.5 c1 c2 <20 c0.2 c2 ¢2 c5 c0.5 c1 c5 c1 c3 <20 8/29/2018 11.4 1.09 3.19 4.26 c0.5 <20 c1 22.7 [1 [0.5 [1 [2 a20 a0.2 c2 c2 c5 c0.5 <1 r5 <1 <3 <20 8/14/2019 11.5 1.19 3.18 4.39 [0.5 <20 <1 22.1 [1 <0.5 al a2 <20 c0.2 c2 c2 a5 [0.5 c1 c5 c1 c3 <20 8/B/2020 11.3 r1.0 3.27 4.14 a0.5 a22 [1 23.0 c1 c0.5 c1 c2 <20 c0.2 a2 [2 c5 c0.5 c1 c5 c1 c3 a20 Site: ACMW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER DUALITY DATA 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date Pt Level C pH m IL m IL NTU m /L m IL m /L m 1L m IL m L 211112020 10.79 5543.76 10.0 6.09 52.1 0.021 0.09 ¢ 0.020 < 0.010 2.07 2.16 5/27/2020 10.13 5544.42 10.2 6.19 50.3 0.021 ¢ 0.10 c 0.020 ¢ 0.010 2.41 2.4 8/8/2020 10.88 5543.67 12.8 6.30 49.8 0.026 < 0.10 < 0.020 < 0.040 2.17 2.2 11/12/2020 16.17 5538.38 12.0 6.51 50.4 0.024 < 0.10 < 0.020 < 0.040 1.59 1.6 Maximum 16.17 5544.42 12.8 6.51 52.1 0.026 ❑.1❑ < 0.020 < 0.040 2.41 2 A0 Minimum 10.13 5538.38 10.0 6.09 49.8 0.021 < 0.090 < 0MO < 0.010 1.59 1.60 Average 11.99 5542.56 11.3 6.27 50.7 0.023 0.098 a 0.020 < 0.025 2.06 2.09 #Tests 4 4 4 4 4 0 ❑ 4 4 4 4 4 4 Site: ACMW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Total Coll E. colr Fecal TES EC Chloride COD SO4 Color Chromo Chromo Strep Date mglL umhos m9lL mglL mg1L Units MPN MPN MPN Comments 2/11/2020 107 143 4.47 2.78 < 1 ¢ 1 5/27/2020 102 134 4.B7 2.58 < 1 ¢ 1 8/812020 109 138 4.69 3.65 < 1 < 1 11/1212020 101 131 3A 6 2.64 < 1 < 1 Maximum 109 143 4.87 3.65 ¢ 1 a 1 Minimum 101 131 3.16 2.58 < 1 < 1 Average 105 137 4.30 2.91 < 1 a 1 #!Tests 4 4 4 ❑ 4 0 4 4 0 Site: ACMW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO,-N Total N Year ft Level C pH mg/L mg1L NTU mg/L mglL mg/L MIL mg1L rn lL 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,E 11.3 6.27 51 0.023 0.098 r 0.020 < 0,025 2.060 2.090 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 0.023 0.063 0.020 a 0.010 0.045 0.115 Average 10.9 5543.6 10.1 6.25 44 54.80 0.198 0.095 0.022 0.013 0.734 0.797 #Tests 9 9 9 9 9 0 1 9 9 9 9 9 9 Site: ACMW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 2012 To: 2020 Total Fecal TD5 EC Chloride COD 504 Color Coli E. coli 5trep Year mg1L umhos mg/L mg1L 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 c 1 < 1 19 120 147 5.34 2.69 ¢ 1 < 1 20 105 137 4.30 2.91 < 1 < 1 Maximum 145 147 5.34 2.99 1 < 1 Minimum 98 80 1.36 2.06 < 1 < 1 Average 114 104 2.35 2.49 1 < 1 #Tests 9 9 9 0 9 0 9 9 0 Site ACMIN-13 Nitrate-Nitrogen &Water Level Chlorides 3.0 5550 50 2.5 5545 40 2-0 — $ 5540 30 £ 15 m E 5535 '6 20 1-0 0.5 5530 10 0❑ 5525 p 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 18 19 20 Nitrate +Water Level Chloride Linear(Chloride) Total Dissolved Solids(TDS) Total Phosphorus 500 1.D 400 D.8 -- 300 D.8 J J Q7 Q� E E 200 0.4 100 - - - - -- 0.2 0 0.0 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 1B 19 20 T�5 Linear(T�5} 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 56 5e TI V 2n 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 a10 3500 a1 55.9 al c0.5 1.24 <20 3840 a0.2 106 a2 a5 <2.5 e1 ¢5 al 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 a0.5 1.01 c2 3610 <0.2 30.6 a2 <5 <0.5 c1 a5 <1 a3 <20 8/19/2015 9.57 5.62 6.44 5.62 a0.5 13000 1.92 176 c1 <0.5 11.5 11.8 22700 c0.2 497 a2 5.93 5.3 <1 a5 al 29.3 48.2 8/10/2016 8.22 2.43 3.08 4.89 a0.5 3810 <1 62.4 <1 a0.5 3.98 4.34 5260 a0.2 110 <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 d <5 1.99 al c5 <1 13.3 26.8 8/29/2018 13.4 2.47 4.16 6.71 <0.5 3840 al 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 a0.5 15200 2.88 183 <1 a0.5 8.88 9.42 17200 <0.2 450 Q <5 4.95 <1 c5 <1 44 58.4 8/8/2020 15.3 4.41 6.78 7.25 <0.5 16000 2.66 175 <1 a0.5 7.27 8.23 19800 <0.2 437 [2 <5 4.74 <1 c5 <1 33.2 49.9 Site: ACMW-14 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg1L mg/L NTU mg/L mg/L mg/L mg1L mg1L mg/L 02/20/2020 17.63 5529.57 10.4 6.00 34.6 0.024 < 0.050 ¢ 0.020 < 0.010 0.371 0.308 06/13/2020 13.90 5533.30 11.8 5.90 29.4 0.023 0.35 < 0.020 < 0.010 0.089 0.44 08/20/2020 16.51 5530.69 14.7 6.34 33.5 0.024 0.28 < 0.020 < 0.01❑ 0.233 0.51 12/16/2020 17.93 5529.27 12.2 6.14 32.3 0.025 < 0.10 < 0.020 ¢ 0.01❑ 0.193 0.19 Maximum 17.93 5533.30 14.7 6.34 34.6 0.025 0.350 < 0.020 < 0.010 0.37 0.51 Minimum 13.90 5529.27 10.4 5.90 29.4 0.023 < 0.050 < 0.020 < 0.010 0.089 0.190 Average 16.49 5530.71 12.3 6.1❑ 32.5 0.024 0.195 < 0.020 < 0.01❑ 0.222 0.362 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-14 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Total Cali E.colt Fecal TDS EC Chloride COD SO4 Color Chromo Chromo Strap Date mgjL umhos mglL mg/L mg/L Units MPN MPN MPN Comments 02/20/2020 68 70 0.984 1.99 1 < 1 06/13/2020 60 65.8 0.711 1.58 73.3 8.5 08120/2020 67 71.7 0.676 1.74 12 ¢ 1 12/16/2020 66 71.1 0.948 1.61 2 < 1 Maximum 68 71.7 0.98 1.99 73.3 8.5 Minimum 60 65.8 0.676 1.58 1.0 ¢ 1 Average 65 69.7 0.83 1.73 22.1 2.9 #Tests 4 4 4 ❑ 4 ❑ 4 4 ❑ Site: ACMW-14 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO,-N NO3-N Total N Year Ft Level C pH mg/L mgIL NTU mg/L mgJL mg1L mg/L mg/L mglL 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 0A29 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 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 0.222 0.362 Average 17.9 5529.3 11.4 6.08 33 0.75 0.033 0.204 0.022 0.028 1.694 1.857 #Tests 9 9 9 9 9 0 1 9 9 9 9 9 9 Site: ACMW-14 SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER DUALITY DA From 2012 To: 2020 Total Fecal TD5 EC Chloride COD SO4 Color Coli E. coli 5trep Year mg1L umhos mg1L mg1L mg1L Units MPN MPN MPN Comments 12 77 94 1.25 1.95 1 < 1 First year of sampling 13 71 85 1.45 113 < 1 ¢ 1 14 69 84 1.33 2.70 < 1 < 1 15 74 93 1.20 2.37 < 1 < 1 16 77 86 1.80 100 ¢ 1 < 1 17 130 145 3.16 3.64 12 < 1 18 75 72 1.03 2.38 124 < 1 19 71 70 1.10 209 33 1 20 65 70 0.83 1 J3 22 3 Maximum 130 145 3.16 3.64 124 ¢ 3 Minimum 65 70 0.83 1.73 < 1 ¢ 1 Average 79 89 1.46 2.40 22 ¢ 1 #Tests 9 9 9 0 9 0 9 9 0 Site ACMW-14 Nitrate-Nitrogen &Water Level Chlorides 10 5545 50 8 — 5540 40 l 6 5535 —y" 30 _j y J '15J m E `a E 4 5530 20 2 — --— 5525 10 0 5520 0 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 18 19 20 Nitrate +Water Level Linear(Nitrate) Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 0.3 300 J E E 0.2 — 200 0.1 — 100 - 0 0.0 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 18 19 20 �To5 Linear(To5y 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 Site: ACMW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT LPINE COUNTY GROUNDWATER QUALITY DAT 2020 Depth Water Temp Alk Hard Turh Total P TKN NH3-N NO2-N NO,N Total N TD5 Date ft Level C pH mg/L mg1L NTU mg/L mg1L M( mg1L mg/L mg/L mg/L 03/30/2020 22.40 5478.20 11.9 6.13 31A 0.028 < 0.050 < 0.020 < 0.010 0.306 0285 56 06/24/2020 12.95 5487.65 13.0 5.96 28.2 0.029 0.27 < 0.020 < 0.010 0.086 0.36 47 09/30/2020 13.54 5487.06 16.9 5.58 31.0 0.029 < 0.10 ¢ 0.020 < 0.010 0.197 0.2 53 12/03/2020 21.52 5479.08 13.4 6.21 33.7 0.027 0.15 < 0.020 < 0.010 0.246 0.4 55 Maximum 22.40 5487.65 16.9 6.21 33.7 0.029 0.270 < 0.020 < 0.010 0.306 0.400 56 Minimum 12.95 5478.20 11.9 5.58 28.2 0.027 < 0.050 < 0.020 < 0.010 0.086 0.200 47 Average 17.60 5483.00 13.8 5.97 31.0 0.028 0.143 < 0.020 < 0.010 0.209 0.311 53 #Tests 4 4 4 4 4 0 ❑ 4 4 4 4 4 4 4 Site: ACMW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER DUALITY DATA 2020 Total Coll E. coli Fecal EC Chloride Clad SO4 Color Chromo Chromo Strep Date umhos m 1L m L m /L Unils MPN MPN MPN Comments 03/30/2020 65.0 0.982 1.65 < 1 < 1 06/24/2020 60.0 0.960 1.26 ¢ 1 a 1 09/30/2020 73.8 1.32 1.37 1 ¢ 1 12/03/2020 79.1 1.25 1.45 < 1 < 1 Maximum 79 1.32 1.65 1 r 1 Minimum 60 0.960 1.26 < 1 ¢ 1 Average 69 1.128 1.43 1.0 < 1 #Tesls 4 4 0 4 0 4 4 0 Site: ACMW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year it Level G pH m /L m L NTU m IL m L m IL mg/1- m fL m 1L 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 6A 1 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 r 0.017 1.557 1.61❑ 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 c 0.020 < 0.020 0.360 0.396 19 118 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 Maximum 27.8 5488.6 14.9 6A 9 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 19.6 5481.0 13.3 6.05 29 4.60 0.033 0.110 0.022 0.018 1.336 1.415 #Tests 9 9 9 9 9 0 1 9 9 9 9 9 9 Site: ACMW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 2012 To: 2020 Total Fecal TES EC Chloride COD SO4 Color Coll E. coli 5trep Year m IL umhos m IL m L m IL 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 r 1 14 61 72 1.58 1.82 < 1 < 1 15 68 86 1.64 1.81 < 1 < 1 16 99 114 3.09 118 3 < 1 17 56 70 0.81 1.76 3 < 1 18 55 fig 1.21 1.46 2 < 1 19 54 67 0.88 1.45 2 < 1 20 53 69 1.13 1.43 1 < 1 Maximum 99 114 3.09 3.18 < 3 < 1 Minimum 53 67 0.81 1.43 r 1 < 1 Average 64 77 1.49 1.83 c 2 < 1 #Tests 9 9 9 0 9 0 9 9 0 Site ACM`III-1 a Nitrate-Nitrogen &Water Level Chlorides 10 5490 20 8 5485 15 — 6 5480 ro � J J E E 10 4 5d 75 5 2 5470 0 5465 0 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 18 19 20 Nitrate Water Level Linear(Nitrate) I Ghloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 0.3 300 J J E 0-2 200 100 0.1 0 0.0 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 18 19 20 Toy Linear{TDS] Natal 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 in 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 a10 561 <1 38.2 <1 c0.5 c1 a20 376 40.2 <20 ¢2 a5 c2.5 al <5 <1 c3 a10 6/12/2013 6.41 1.20 1.59 4.1 6/5/2014 7.09 1.15 1.67 4.4 a0.5 69.8 c1 30.6 al <0.5 al a2 67.6 <0.2 3.52 c2 r5 <0.5 <1 a5 c1 e3 <20 6/2/2015 7.49 1.08 1.75 4.2 <0.5 35 c1 34 C1 <0.5 sl a2 46.2 <0.2 2.15 a2 <5 r0.5 al <5 <1 r3 a20 8/30/2016 11.1 1.59 2.56 5.0 a0.5 22.3 <1 42.4 al <0.5 <1 a2 21.3 c0.2 a2 <2 a5 <0.5 <1 <5 al c3 <20 6/20/2017 6.60 al 1.57 3.9 <0.5 152 <1 22.5 <1 <0.5 <1 a2 152 <0.2 3.62 a2 a5 <0.5 <1 a5 <1 <3 <20 9/20/2018 7.25 <1 1.68 3.6 <0.5 67.3 <1 29.3 <1 <0.5 al c2 35.1 <0.2 3.62 <2 ¢5 <0.5 al <5 <1 <3 <20 5/13/2019 6.88 <1 1.60 3.3 <0.5 39.8 ¢1 25.7 a1 a0.5 <1 a2 33.9 <0.2 3.62 <2 ¢5 a0.5 al c5 <1 <3 a20 6/24/2020 6.53 <1 1.5 2.87 <0.5 143 ¢1 26.4 a1 a0.5 <1 <2 140 <0.2 4.04 <2 ¢5 <0.5 al <5 <1 <3 a20 Site: ACMW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg1L mg/L NTU mglL mg/L mg1L mg/L mg1L mg1L 03/30/2020 13.32 5471.21 10.1 6.21 67.9 0.045 < 0.050 < 0.020 < ❑.❑1❑ 0.48 0A66 0612412020 8.52 5476.01 12.6 6.50 55.1 0.060 0.29 < 0.020 < 0.010 0.412 0.70 09/3012020 10.54 5473.99 17.2 6.07 57.5 0.046 r 0.10 < 0.020 ¢ 0.010 0.320 0.32 12/03/2020 12.77 5471.76 13.2 6.26 58.6 0.045 0.26 < 0.020 < 0.010 0.209 0.47 Maximum 13.32 5476,01 17.2 6.50 67.9 0.060 0.290 < 0.020 r 0.010 0.48 0.70 Minimum 8.52 5471.21 10.1 6.07 55.1 0.045 ¢ 0.050 a 0.020 < 0.010 0.209 0.320 Average 11.29 5473.24 13.3 6.26 59.8 0.049 0.175 < 0.020 a 0.010 0.355 0.489 #Tests 4 4 4 4 4 0 ❑ 4 4 4 4 4 4 Site: ACMW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Total Cali E colr Fecal TDS EC Chloride COD SO4 Color Chroma Chromo Strep Date mg1L umhos mg1L mg/L mg1L Units MPN MPN MPN Comments 03/30/2020 103 141 2.00 1.74 2 a 1 06/24/2020 85 119 1.38 2.26 = 2420.0 210 09/30/2020 91 125 1.54 1.61 7.4 a 1 12/03/2020 87 129 1.12 1.72 2 < 1 Maximum 103 141 2.00 2.26 a 2420 210 Minimum 85 119 1.12 1.61 2 r 1 Average 92 129 1.51 1.83 608 53 #Tests 4 4 4 ❑ 4 0 4 4 0 Site: ACMW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO,-N Total N Year It Level C pH m L m 1L NTU m !L m 1L mgJL m /L m IL m /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 c 0.020 a 0.013 0.776 0.795 16 11.8 5472.8 12.7 6.26 42 0.051 0.683 r 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 a 0.020 < 0.015 0.712 0.760 19 8.94 5475.6 12.0 6.11 51 0.051 a 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 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 0.047 < 0.060 < 0.020 < 0.010 0.310 0.356 Average 13.3 5471.2 12A 6.32 56 5.60 0.073 0.170 0.022 0.016 1.569 1.706 #Tests 9 9 9 9 9 0 1 9 9 9 9 9 9 Site: ACMW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER DUALITY DA From 2012 To: 2020 Tolal Fecal TD5 EC Chloride COD SO4 Color Coll 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 r 1 16 133 163 3.62 3.99 9 a 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 a 1 20 92 129 1.51 1.83 608 53 Maximum 133 163 3.64 3.99 608 53 Minimum 85 117 1.30 0.82 < 1 < 1 Average 104 135 2.50 1.97 70 7 #Tests 9 9 9 0 9 ❑ 9 9 0 Site AC1111W-16 Nitrate-Nitrogen &Water Level Chlorides 10 5485 40 8' 5480 30 r E' 5475 y J y J E 20 4 5470 3 2' 5466 10 CI 5460 0 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 18 19 20 t Nitrate tYVarer Liii Linear(Nitrate) - 8 Chloride Linear(Chloride) Total Dissolved Solids [TDS) Total Phosphorus 500 0.4 400 0.3 300 J J is m 0.2 E 200 100 0.1 0 0.0 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 18 19 2D tT05 Linear(TIJS) Tolal 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 5b 5e TI V 2n mg/L mg/L rng/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 a10 849 <1 39.8 <1 a0.5 ¢1 <20 830 c0.2 22.5 <2 a5 c2.5 a1 a5 r1 a3 <10 5/12/2013 16.1 1.21 4.15 7.97 6/5/2014 14.2 1.68 4.33 7.01 c0.5 109 1.88 42 al c0.5 ai a2 466 <0.2 3.88 <2 c5 c0.5 al c5 c1 c3 c20 6/2/2015 13.2 1.21 4.00 6.89 <0.5 212 2.1 27.6 <1 c0.5 c1 a2 41.6 <0.2 4.35 c2 <5 <0.5 c1 <5 al a3 a20 8/30/2016 15.0 3.83 4.12 7.5 <0.5 62.7 <1 80 <1 a0.5 c1 a2 56.4 <0.2 2.06 a2 <5 <0.5 <1 <5 c1 <3 a20 6/20/2017 11.7 3.68 3.35 5.68 <0.5 151 a1 58.2 <1 <0.5 c1 <2 50.3 <0.2 r2 <2 c5 <0.5 al <5 al <3 a20 9/20/2018 12.1 4.04 3.29 6.22 a0.5 120 <1 82.5 <1 <0.5 al c2 69.0 c0.2 a2 <2 <5 <0.5 <1 c5 <1 c3 <20 6/13/2019 11.1 3.51 3.05 5.11 c0.5 41.1 al 68.6 <1 c0.5 <1 a2 30.4 a0.2 <2 c2 a5 c0.5 <1 a5 <1 <3 <20 6/24/2020 12.3 3.84 3.33 5.10 a0.5 59.7 <1 78.4 al <0.5 <1 c2 47.0 a0.2 a2 t2 [5 [0.5 <1 <5 <1 [3 c20 Site: ACMW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mglL mg/L NTU mg/L mglL mglL mg1L mg1L mglL 03/30/2020 17.05 5487,87 9.3 6.40 42.2 0.024 0.050 < 0.020 a 0.020 0.828 0.761 06/24/2020 6.45 5498.47 9.7 6.62 31.2 0.021 0.17 a 0.020 < 0.020 0.436 0.61 09/30/2020 13.53 5491.39 15.4 6.19 38.1 0.026 < 0.1❑ a 0.020 < 0.010 1.51 1.50 12/03/2020 15.86 5489.06 12.1 6.39 38.6 0.028 0.320 a 0.020 < 0.010 1.17 1.50 Maximum 17.05 5498.47 15.4 6.62 42.2 0.028 0.320 a 0.020 a 0.020 1.51 1.50 Minimum 6.45 5487.87 9.3 6.19 31.2 0.021 a 0.100 < 0.020 a 0.01❑ 0.436 0.610 Average 13.22 5491.70 11.6 6.40 37.5 0.025 0.160 < 0.020 < 0.015 0.986 1.093 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Tatal Coli E. call Fecal TDS EC Chloride COD SO4 Color Chmmo Chromo Strep Date mg1L umhos mg/L _ mg/L mg1L Units MPN _ MPN MPN Comments 03/30/2020 83 108 4.99 2.85 < 1 ¢ 1 06/24/2020 55 77 2.71 2.88 < 1 r 1 09/30/2020 76 107 2.73 3.01 < 1 r 1 12/03/2020 71 107 2.78 2.88 < 1 < 1 Maximum 83 108 4.99 3.01 < 1 c 1 Minimum 55 77 2.71 2.85 < 1 < 1 Average 71 100 3.30 2.91 < 1 a 1 9 Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER DUALITY DATA From: 2012 To: 2020 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 Z 5493.4 11.9 6.38 36 0.037 r 0.050 0.022 < 0,010 0.864 0.880 15 17.3 5487.6 11.0 6.30 36 0.025 r 0,050 a 0.020 < 0,013 0.450 0,455 16 11.0 5493.9 12.2 6.22 35 0.027 < 0.105 < 0,074 a 0.025 1.033 1,032 17 9.5 5495.4 11.1 6.30 34 0.030 0,090 a 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 6A0 38 0.025 0.160 t 0.020 t 0-015 0.986 1.093 Maximum 17.5 5495,6 12.2 6.43 41 2.8 0.054 0.160 0.074 0.025 1.449 1.516 Minimum 9.3 5487.4 9.5 6.20 34 2.8 0.024 < 0.050 0.020 < 0.01❑ 0.450 0.455 Average 13.1 5492.2 11.3 6.32 36 2.8 0.031 0.083 0.028 0.014 0.962 0.989 #Tests 9 10 9 9 9 ❑ 1 9 9 9 9 9 9 Site: ACMW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 2012 To: 2020 Total Fecal TD5 EC Chloride COD 504 Color Coli E. coli 5trep Year m L umhos m fL m IL m IL Units MPN MPN MPN Comments 12 78 105 2.25 2.26 1 r 1 First year of sampling 13 79 100 2.17 2,44 1 a 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 c 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 Maximum 79 105 3.30 3.33 1 < 1 Minimum 67 87 1.59 < 2.26 a 1 < 1 Average 73 94 2,17 2.71 1 < 1 #Tests 9 9 9 0 9 0 9 9 0 Site ACMW-17 Nitrate-Nitrogen&Water Level Chlorides 5 5500 40 - 4 - 5495 30 3 5490 J J E E 20 2 5485 1p - 1 5480 0 5475 0 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 18 19 20 Nitrate t Water Level Linear(Nitrate) IChloride Linear[Chloride] Total Dissolved Solids(TDS) Total Phosphorus 500 0.4 400 0.3 300 m 0.2 £ 200 £ 0.1 100 0 0.0 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 18 19 20 �TD9 Linear(TD5) Total P Linear(Togl P) Annual Metal Report ACM W-17 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Ma Ni Pb S6 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/f. 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 <10 299 <1 28 <1 r0.5 <1 <20 249 a0.2 <20 <2 <5 ¢2.5 <1 <5 <1 r3 <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 r1 r0.5 <1 <2 327 r0.2 6.29 <2 <5 r0.5 r1 r5 <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 r0.2 <2 <2 <5 r0.5 <1 <5 <1 <3 <20 8/30/2026 8.50 1.54 2.36 4.99 <0.5 <20 r1 23.4 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 r3 <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 r3 <20 9/20/2018 8.15 1.00 2.25 4.58 <0.5 <20 <1 20.5 <2 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 [3 <3 <20 6/13/2029 7.63 <1 2.13 4.3 <0.5 32.0 <1 28.1 <1 <0.5 <1 r2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/24/2020 7.99 <1 2.17 4.29 <0.5 27.2 <1 19.2 <1 <0.5 <1 <2 d0 <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 2020 Depth Water Temp Alk Hard Turb Total P TKN NH,N NO2-N NO-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L m21L mg/L mg/L 03/30/2020 8.69 5461.87 10.6 6.59 34.2 0.028 < 0.050 a 0.020 < 0.020 0.61 0.556 06/24/2020 5.80 5464.76 13.0 6.71 25.6 0.034 0.2 c 0.020 < 0.020 0.28 0.48 0913012020 8.57 5461.99 15.6 6.76 33.1 0.030 0.19 < 0.020 < 0.010 0.205 0A 12/03/2020 8.82 5461,74 13.2 6.66 32.9 0.031 0.25 ¢ 0.020 a 0_010 0.32 0.57 Maximum 8.82 5464.76 15.6 6.76 34.2 0.034 0.25 < 0.020 < 0.020 0.61 0.57 Minimum 5.80 5461.74 10.6 6.59 25.6 0.028 < 0.050 < 0.020 < 0.010 0205 0A Average 7.97 5462.59 13.1 6.68 31.5 0.031 0.173 a 0.020 < 0.015 0.352 0.502 #Tests 4 4 4 4 4 ❑ ❑ 4 4 4 4 4 4 Site: ACMW-18 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Total Coli E. coli Fecal TDS EC Chloride COD SO4 Color Chromo Chromo Strep Date mglL umhos mg/L mg/L mglL Units MPN MPN MPN Comments 03/30/2020 68 80.0 2.59 1.92 < 1 < 1 06/24/2020 50 58.0 1.37 2.01 1 < 1 09/30/2020 51 74.7 1.46 1.63 1 < 1 12/03/2020 55 79.1 1.88 1.65 a 1 < 1 Maximum 68 80.0 2.59 2.01 1 < 1 Minimum 50 58.0 1.37 1.63 < 1 < 1 Average 56 73.0 1.83 1.80 1 < 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: 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO,-N NO,-N Total N Year ft Level C pH mg/L mg/L NTU m2�1- mg/L mg1L mglL mg/L M/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 6A8 33 0.031 0.061 0.021 a 0.015 1.500 1.558 15 10.3 5460.3 12.9 6A3 37 0.031 a 0.050 < 0.020 < 0.013 0.401 0.413 16 8.2 5462.3 12.4 6A0 30 0.030 0.203 < 0.020 a 0.035 2.545 2.71❑ 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 c 0.020 a 0.010 0.594 0.637 19 7.1 5463.5 12.5 6.21 31 0.033 0.090 < 0.020 a 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 Maximum 11.3 5463.8 13.1 6.68 37 5.20 0.049 0.203 0.028 0.035 2.545 2.71❑ Minimum 6.8 5459.2 11.9 6.18 27 5.20 0.030 0.050 0.020 a 0.010 0.352 0.413 Average 8.8 5461.8 12.6 6.43 33 5.20 0.034 0.11❑ 0.021 0.016 1.141 1.201 #Tests 9 9 9 9 9 0 1 9 9 9 9 9 9 Site: ACMW-18 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2012 To: 2020 Total Fecal TDS EC Chloride COD SO4 Color Coli !_. coli Strep Year mglL umhos mglL mg1L mg1L 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 c 1 Maximum 72 91 1.89 3.34 10 < 1 Minimum 5.4 73 1.09 1.80 < 1 < 1 Average 63 84 1.54 2.40 3 < 1 #Tests 9 9 9 0 9 0 9 9 0 Site AC MW-18 Nitrate-Nitrogen &Water Level Chlorides 5 5475 40 4 5470 30 d= 3 5465 —� J pr J 6 20 m E 2 - 5460 10 1 5455 0 L 5450 0 12 13 14 15 15 17 18 19 20 12 13 14 15 16 17 18 19 20 t Nitrate t Water Level Linear(Nitrate) Chloride Linear(Chloride) Total Dissolved Solids (TOS) Total Phosphorus 500 0.4 400 0.3 300 J J £ 0-2 — 200 100 D.1 0 0.0 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 18 19 20 TDS Linear CTD5] +Total P Linear(Tvlal 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 5b 5e TI V In 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 a10 433 <1 22 <1 <0.5 <1 <20 321 <0.2 <20 <2 <5 <2.5 <1 ¢5 <1 a3 <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 a20 <3 20.3 <1 a0.5 <1 <2 <20 a0.2 <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 ai 16.6 <1 <0.5 al a2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/20/2017 7.46 <1 2.02 3.38 a0.5 109 <1 14.1 al <0.5 <1 <2 33.7 <0.2 <2 <2 <5 <0.5 <1 <5 <3 <3 <20 9/20/2018 8.55 <1 2.22 3.75 <0.5 20 al 16.7 <1 <0.5 <1 a2 <20 a0.2 2.4 2.04 <5 <0.5 ai <5 <1 a3 a20 6/13/2019 9.32 al 2.43 3.97 a0.5 <20 <1 17.3 ai a0.5 <l a2 <20 t0.2 3.63 a2 a5 a0.5 <l [5 ai a3 a20 6/24/2020 6.22 a1 1.57 2.89 a0.5 152 <1 14 ai a0.5 <1 C2 59.9 <0.2 11.4 2.42 a5 <0.5 a1 a5 al a3 a20 Site: ACMW-19 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Depth Water -temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mglL mglL NTU mglL mg/L mglL mglL mglL mglL 03/30/2020 7.84 5409.41 10.4 6.83 91.5 0.093 0.11 0.041 r 0.010 < 0.010 0.11 06/24/2020 7.90 5409.35 12.0 6.94 92.0 0.097 0.39 0.039 < 0.010 < 0.010 0.39 09/30/2020 7.99 5409.26 15.9 6.74 96.3 0.104 0.3 0.045 ¢ 0.010 < 0.010 0.3 12/03/2020 7.01 5410.24 12.8 6,92 101 0.100 0.22 0.049 < 0.010 < 0.010 0.22 Maximum 7.99 5410.24 15.9 6.94 101 0.104 0.390 0.049 < 0.01❑ < 0.010 0.390 Minimum 7.01 5409.26 10A 6.74 91.5 0.093 0.110 0.039 < 0.010 ¢ 0.010 0.110 Average 7-69 5409.57 12.8 6.86 95.2 0.099 0.255 0.044 < ❑.01❑ < 0.010 0.255 #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 2020 Total Coll E.coli Fecal TDS EC Chloride COD SO4 Color Chrom❑ Chromo Strep Date mg!L umhos mg1L mglL mg1L Units MPN MPN MPN Comments 03/30/2020 125 179 2.80 2.28 < 1 < 1 06/24/2020 121 182 2.96 1.90 < 1 < 1 09/30/2020 130 192 2.98 1.74 ¢ 1 < 1 12/03/2020 124 212 3.07 0.655 ¢ 1 < 1 Maximum 130 212 3.07 218 ¢ 1 < 1 Minimum 121 179 2.80 0.66 a 1 a 1 Average 125 191 2.95 1.64 < 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: 2020 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO,N Total N Year ft Level C pH mg1L mglL NTU mg/L_ mg1L mg1L mg1L mg1L mg/L 12 7.4 5409.9 12.9 6.75 106 6.70 0,092 0.106 0.050 a 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 < ❑.010 < 0.01❑ 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 a 0.010 0,255 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 0.092 < 0.106 0.041 < 0.01❑ < 0.009 0.123 Average 7.5 5409.7 12.8 6.78 102 6.70 0.104 0.156 0.048 0.011 0.011 0.157 #Tests 9 9 9 9 9 0 1 9 9 9 9 9 9 Site: ACMW-19 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER DUALITY DATA From 2012 To: 2020 Total Fecal TDS EC Chloride COD SO4 Color Cali E. coli Strep Year mg/L umhos mglL mglL mglL 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 a 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 s 1 r 1 Maximum 155 253 14.32 8.17 6 < 1 Minimum 120 191 2.46 1.62 < 1 < 1 Average 139 218 4.58 2.91 2 < 1 #Tests 9 9 9 0 9 0 9 9 0 Site AC MW-19 Nitrate-Nitrogen &Water Level Chlorides 0.25 - 5425 40 020 — 5420 30 - 0.15 5415 y J E ' E 20 0.10 - -- 5410 10 0.05 -- 5405 0.00 5400 0 12 13 14 15 16 17 18 19 20 12 13 14 15 16 17 18 19 20 Nitrate t Water Level Linear(Nihate) � Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 0.3 300 J J I E 0-2 200 100 0.1 - 0 00 12 13 14 15 15 17 18 19 20 12 13 14 15 16 17 18 19 20 —G----TDS Linear JDS] - 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 5b 5e TI V 2n 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 a10 358 1.2 32.8 <1 ¢0.5 al <20 611 a0.2 1690 3.08 <5 <2.5 <1 ¢5 <1 <3 a10 6/12/2013 21.7 2.07 7.01 9.86 6/5/2014 31.8 2.35 10.1 10.1 al 255 2.33 103 <2 ¢1 a2 <4 750 a0.2 4980 <4 a10 <1 a2 a10 <2 <6 a40 6/2/2015 18.4 1.44 5.77 7.06 a0.5 <20 <1 80 al <0.5 c1 a2 138 c0.2 2400 3.77 <5 c0.5 <1 <5 al <3 <20 8/30/2016 23.9 2.14 7.21 8.44 c0.5 a20 al 108 al a0.5 al c2 212 a0.2 c2 c2 c5 <0.5 al a5 <l c3 <20 6/20/2017 25.8 1.73 8.08 9.10 c0.5 22.8 c1 108 al c0.5 <1 c2 232 <0.2 3380 2.44 c5 c0.5 ¢1 c5 <1 c3 <20 9/20/2018 22.8 1.54 6.77 10.8 c0.5 <20 al 106 cl c0.5 al c2 176 a0.2 3140 3.52 c5 c0.5 cl c5 <1 c3 <20 6/13/2019 21.1 1.42 6.31 9.91 t0.5 <20 <1 93.6 tl c0.5 <1 c2 156 <0.2 3000 3.29 c5 c0.5 a1 c5 <1 c3 <20 6/24/2020 19.4 1.25 5.70 8.70 a0.5 34.1 al 88.7 c1 a0.5 cl <2 154 <0.2 2820 3.57 a5 c0.5 cl a5 c1 c3 a20 ALPINE COUNTY POTABLE WATER WELLS Site: GW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER DUALITY DATA 2020 Temp Alk Hard Turb Total P TKN NH3-N NO,-N NO,-N Total N Date C pH m IL m /L NTU m IL m /L m IL m IL m /L m IL 02/20/20 7.0 6.31 61.5 0.028 0.10 < 0.020 < 0.010 4.24 4.34 06/15/20 11.8 6.24 59.8 0.040 0.18 < 0.020 < 0.010 4.16 43 08/20/20 14.8 9.68 59.9 0.040 < 0.10 < 0.020 < 0.010 3.43 34 12/16/20 10.1 6A4 60.6 0.039 < 0.10 0.032 < 0.010 4.85 4.8 Maximum 14.8 9.68 61.5 0.040 0.180 0.032 < 0.010 4.85 4.80 Minimum 7.0 6.24 59.8 0.028 a 0.100 ¢ 0.020 a 0.010 3.43 3.40 Average 10.9 7.17 60.5 0.037 0.120 0.023 < 0.010 4.17 4.21 #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 2020 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Date m IL umhos m fL m 1L m IL Units MPN MPN MPN Comments 02J20120 176 258 27.9 9.74 < 1 < 1 06/15/20 159 251 26.3 9.35 < 1 < 1 08/20/20 159 244 23.5 8.59 < 1 a 1 12J16120 179 286 30.0 9.99 < 1 r 1 Maximum 179 286 30.0 10.0 r 1 < 1 Minimum 159 244 23.5 8.6 < 1 < 1 Average 168 260 26.9 9A < 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 Iasi To: 2020 Temp Alk Hard Turb Total P TKN NH,-N N0,N N%-N Total N Year C PH m !L -MIL NTU m L M91L m IL m IL m IL m IL 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 ❑.020 c 0.010 0.840 0.860 84 12.0 6.41 52.0 88 0.22 ❑.040 0.108 0.040 a 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 c 0.010 0.861 0.949 87 11.6 6.63 55.0 97 0.21 0.032 0.086 < 0.020 a 0.010 0.970 1.32 88 11.5 6.51 56.0 111 025 0.030 0.105 0.029 c 0.010 1.00 1 12 89 11.1 6.49 55.0 112 0.25 0.028 0.099 0A37 < 0.010 1.04 1.15 90 11.5 6.74 53.0 126 0.15 0.042 0.007 < 0.020 a 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 0A24 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 96 209 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 60,0 105 021 0.029 0.116 0.021 0 011 3.07 3.20 98 10.7 6.40 62.0 94 0.53 ❑.032 0.131 a 0.021 r 0.010 302 3.16 99 11.6 6.33 61,0 93 0.11 0.033 0.139 a 0.020 c 0.010 3.18 3.33 00 11.2 6.74 62.0 84 0.12 ❑.037 0.189 0.021 a 0.012 3.59 3.70 01 11.8 6A8 62,0 83 0.15 0.033 0.100 c 0.020 c 0.028 3.39 3.48 02 11.6 6.54 62.0 78 0.02 0A30 0.113 < 0.053 330 3.48 03 11.9 6.79 59A 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 c 0.030 3.47 3.57 05 112 6.62 58.3 79 0.06 0A34 0.101 a 0.030 3.64 3.76 06 11.1 6.63 56.9 77 0.17 0.032 0.066 r 0.032 3.81 3.89 07 10.9 6.63 58.7 82 0.08 0.029 0.067 r 0.035 4-61 4.68 08 11.4 6.67 61.5 89 0.09 0.035 < 0.058 c 0.044 5.18 525 09 11.3 6.36 61.5 90 0.06 0.037 r 0.050 a 0.048 5.61 5.68 10 11.3 6.46 60.9 83 0.09 0.037 0.052 c 0 048 525 5.33 11 11.5 6.29 61.2 78 0.18 0A40 0.058 r 0.043 4.52 4.54 12 12.3 6.46 62.7 83 0.09 0.037 0.184 a 0.020 c 0 049 4.67 4.82 13 11.6 6.39 62.6 0A39 0.127 0.026 < 0.042 4.86 4.86 14 12.1 6A2 61.8 0.036 0.358 0.025 c 0 040 4.57 4.87 15 12.3 6.45 61.0 0.042 0.108 a 0.020 c 0 040 4.74 4.70 16 11.5 6.48 61.5 0.043 0.255 a 0.020 < 0 050 4.19 4.36 17 12.2 6.49 60.0 0.038 0.300 0.023 a 0.038 383 406 18 11.2 6.17 60.3 0.038 0.208 a 0.020 c 0.014 3.97 4.15 19 12.4 6.22 61.0 0A38 0.118 c 0.020 < 0 020 4.08 4.05 20 10.9 7.17 60.5 0.037 0.120 0.023 < 0.010 4.17 421 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 a 0.050 0.010 c 0.010 0.710 0.830 Average 11.5 6.56 58.1 96 0.21 0.035 0.119 0.025 0.025 3.00 3.11 #Tests 40 40 40 30 31 40 40 30 38 40 40 Site: GW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 1981 To: 2020 Total Fecal Fecal T05 EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mglL mg1L Units MPN MPN MPN Comments 81 171 238 35.0 1 a 5 3,9 a 2.2 82 187 256 3 5.0 < 2.2 83 155 252 38,0 1 5 a 2,2 a 2.2 84 172 247 34,0 1 < 5 a 2.2 < 2.2 85 171 250 32.9 1 c 5 2.6 a 2.2 86 175 255 38.5 2 < 5 2.3 < 22 87 188 270 35.8 3 < 5 a 2,2 a 2.2 88 208 310 41.6 5 c 5 c 22 < 2.2 89 213 316 42.4 5 < 6 < 2.0 < 2.0 90 233 348 48,2 < 5 < 5 c 2.0 < 2.0 91 251 357 50,8 5 a 5 3.2 a 2.0 92 250 366 49.9 < 5 < 5 3,2 < 2.0 93 245 356 4-4.6 < 5 < 5 2,3 a 2,0 94 240 365 49,8 a 5 4 4,6 < 2.0 95 222 336 40,0 7 c 5 2.0 a 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 a 5 a 1,1 a 1.1 99 181 279 28.6 c 5 c 5 1,6 1.1 00 174 268 23.6 s 5 10.8 < 5 a 1,1 a 1.1 01 167 256 23.6 < 5 13,1 a 5 1.1 1.1 02 166 251 22,8 < 5 122 < 5 c 1.1 < 1.1 03 164 245 24A 6 11.8 a 5 a 1.1 a 1.1 04 168 252 26.3 < 5 11,7 < 5 c 1A < 1.1 05 172 238 28.1 < 5 11,8 < 5 c 1.1 c 1.1 06 174 241 29.5 < 6 11,3 < 5 a 1.1 a 1.1 07 189 281 32.9 a 5 11,8 5 c 1A < 1.1 08 195 308 34.3 < 5 12,1 5 a 1.1 a 1.1 09 197 305 34.2 ¢ 5 11.9 5 a 1.1 < 1.1 10 195 296 31.3 11 12A c 5 c 1.1 < 1.1 11 183 280 27.7 6 11,8 a 5 a 1A a 1.1 12 183 278 28.2 11.7 c 5 c 1.1 < 1.1 13 188 285 29,0 11.5 a 1A < 1.1 14 184 283 28.3 112 c 1.1 c 1.1 15 187 287 29,6 11.9 7.3 < 1.0 16 178 277 27.3 11.0 c 1.0 < 1,0 17 169 252 23Z 10.1 a 1.0 a 1.0 18 173 266 25.4 9.8 < 1.0 < 1.0 19 174 265 25.6 9.4 c 1.3 c 1.0 20 168 260 26.9 9A c 1.0 a 1.0 Maximum 251 366 50.8 11 13,1 5 7.3 2.2 Minimum 155 238 22,8 1 9.4 4 c 1.0 c 1.0 Average 190 285 33.1 4 11.4 5 2.0 1.5 #Tests 40 40 39 31 21 31 40 40 0 Site GW-05 Nitrate-Nitrogen Chlorides �0 100 9 90 8 80 7 70 6 60 J J E $ 6 50 4 40 - 3 30 --! 2 20 1 10 0 8182838485668786999091929394969E 97989000010203040506070809101112131415161716192D 0 6182838465868788899091929391959697999900010203014050607HOO 10 11 12 13 14 15 16 17 18 1920 Nitrate Linear[Nitrate] Chloride Linear(Chloride) Total Dissolved Solids (TES) Total Coliform Bacteria 500 25 400 20 300 - E 15 J � G E r 200 a 10 } 100 5 - 0 0 81 5283 8485 8687 86 0990 91 92 93 94 95 96 97 98 99 00 01 0203 04 05 06 07 08 0910 11 1213 14 1516 17 161920 81 82828485 131367 88$9 90 91 9293 9495 96 979999 0001 02 0304 05 0607019 09 10 11 12 13 14 I5 16 17 18 1920 --*--TDS Linear[TDS] Total Colifonns Linear[Total Coliforms] Annual Metal Report GW-05 Neddenriep Ca N Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb 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 6/7/2006 19.0 3.55 6.56 18.9 <50 <2 <2 <10 [2 [2 <20 <50 C0.2 <20 <2 <2 <2.5 <10 <2 C1 2 60.6 6/12/2007 21.6 3.66 6.90 19.7 <20 C2 180 C1 13.8 a0.5 C1 <20 <50 a0.2 CIO C2 C5 C2.5 C5 C1 C1 5.1 72.2 6/18/2008 24.1 4.02 7.04 20.5 <20 [2 53 <1 <10 a0.5 a1 <20 <50 a0.2 <20 a2 a5 [2.5 C5 C1 C1 a3 68.4 6/9/2009 23.2 3.90 7.34 22.6 <20 a2 55 a1 <10 [0.5 a1 <20 <50 [0.2 <20 a2 a5 a2.5 a5 a1 a1 a3 55.6 6/8/2010 23.0 3.50 7.30 21.0 <20 [1 55 <1 a0.5 a0.5 C1 3.4 <20 a0.2 2 a2 a5 a0.5 a5 C1 C1 a3 55 6/1/2011 21.1 3.67 7.25 22.2 <20 a1 47.9 C1 a0.5 a0.5 C1 2.56 <20 a0.2 a2 <2 a5 C0.5 a5 a1 a1 a3 82.5 7/5/2012 17.3 3.62 6.12 20.4 <20 a1 47.8 C1 <10 [0.5 [1 [20 <50 [0.2 <20 a2 a5 a2.5 a5 a1 a1 44 6/11/2013 20.5 3.68 6.20 22.2 7/8/2014 20.8 3.65 6.64 23.7 <20 a1 49.0 a1 a0.5 a0.5 a1 2.41 <20 a0.2 a2 C2 C5 [0.5 a5 a1 a1 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 a2 a2 a5 0.52 a5 a1 <1 -<3 77.9 8/16/2016 17.4 3.45 5.73 22.9 <20 a1 46.4 a1 a0.5 a0.5 a1 a2 <20 [0.2 [2 [2 C5 1.65 a5 a1 a1 3.14 123 6/8/2017 15.8 3.19 5.38 20.6 <20 <1 42.5 C1 [0.5 [0.5 C1 <2 <20 <0.2 a2 <2 <5 <0.5 C5 C1 C1 C3 80 9/18/2018 17.5 3.07 5.45 22.0 <20 <1 42.3 a1 <0.5 [0.5 C1 C2 <20 [0.2 [2 <2 a5 a0.5 a5 a1 c1 6/6/2019 18.2 3.26 5.64 23.3 <20 a1 44.8 a1 a0.5 a0.5 a1 a2 <20 a0.2 a2 C2 C5 [0.5 C5 C1 C1 <3 44.2 6/15/2020 17.8 3.15 5.45 22.2 <20 <1 a1 46.8 [0.5 [0.5 C1 <2 <20 <0.2 <2 ¢2 ¢5 a0.5 ¢5 <1 <1 <3 82.7 Site; GW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date C pH mg1L mg1L NTU mg1L mg1L mg1L mglL mglL mq/L 02/20/20 12.2 6.19 46.1 0.D40 < 0.05 < 0.020 < 0.010 10.5 9.85 06/15120 14.1 5A5 40.4 0.068 0.21 < 0 020 < 0.010 14.9 15 08/20/20 18.6 6.72 47.2 0.069 < 0.10 < 0.020 < 0.010 11.9 12 12/16/20 9.3 6.23 47.8 0.041 < 0.10 < 0 020 < 0.010 10.8 11 Maximum 18.6 6,72 47.8 0.069 0.210 c 0.020 < 0.01 14.9 15.00 Minimum 9.3 5.85 40A 0.040 < 0.050 r 0.020 < 0.010 10.50 9.85 Average 13.6 625 45.4 0.055 0.115 r 0.020 < 0.010 12.03 11.96 #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 2020 Total Fecal TD5 EC Chloride COD 504 Color Coli E. toll 5trep Date mg1L umhos mglL mglL mg1L Units MPN MPN MPN Comments 02/20/20 221 338 42.4 11.0 < 1 < 1 06/15/20 219 346 39.1 12.0 < 1 < 1 08/20120 233 319 43.2 11.5 < 1 < 1 12/16/20 225 366 44.6 12.7 ¢ 1 < 1 Maximum 233 366 44.6 12.7 < 1 < 1 Minimum 219 319 39.1 11.0 ¢ 1 < 1 Average 225 342 42.3 11.8 < 1 < 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: 2020 Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO,-N Total N Year C pH mg1L mg/L NTU mg1L mg/L mg/L mg/L mgL mq/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 a 0,010 1.530 1.600 84 11.2 6.38 49.0 88 1,69 0.090 0.138 0A30 < 0.010 1.240 1.390 85 10.0 6.50 46.0 84 0.81 0,049 0,107 0,028 c 0.010 1 081 1.198 86 10.9 6,48 47.0 106 1.50 0.039 0,090 0.020 a 0.010 1 313 1.413 87 12.7 6.56 45.0 100 1.67 0.055 0.141 a 0.021 c 0.01❑ 1,340 1.844 88 13.9 6.57 45.0 102 1.40 0,039 0.152 0.030 a 0 010 1.536 1.698 89 10.9 6.54 46.0 121 922 0.081 0.104 0.024 a 0,010 2,638 2.752 90 12,0 6,79 46.0 103 2.38 0.045 0.102 0A20 < 0.010 3.414 3,525 91 11.7 7.01 52.0 86 0.95 0.074 0,125 0.033 a 0.010 2.937 3A72 92 12.1 6.76 54.0 85 0.31 0.038 0.121 0,023 0.01❑ 3.711 3.842 93 11.8 6.95 57.0 72 0.73 0.041 0.125 ❑.024 0.011 4.054 4.189 94 11.7 6.78 57.0 68 0.54 0,032 0.100 0A28 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 < 0A21 c 0.010 4.617 4.791 99 12.0 6.35 51.0 42 0.54 0.044 0.111 a 0,020 a 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 a 0.033 5.142 5.246 02 11.9 6.54 49.0 55 0,36 0,058 0.212 c 0.051 6.282 6.645 03 12.4 7.06 47.6 49 36.70 0,077 0,084 a 0.045 5266 5,383 04 13.0 6,70 50.1 53 4.92 0,113 0.149 a 0.043 5.715 5.872 05 12.3 6.53 49.5 60 2.65 0.046 0.096 c 0.047 7.136 7218 06 12.3 6.45 512 62 8,84 0.056 0.168 a 0.067 9A35 9.060 07 13.4 6.26 51.7 60 2.50 0.041 0.089 a 0.091 9,036 9.171 08 13.8 6.48 52.1 55 0.71 0.074 a 0,058 c 0.088 7.759 7.873 09 13.9 6.19 48.5 58 4,74 0.061 c 0,050 a 0 068 7.118 7.210 10 12.9 6.31 4&1 55 0.34 0.069 0,064 a 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 a 0,051 a 0.020 c 0,063 7.544 7-656 13 14.5 620 47.5 0.050 0-652 0,027 c 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 c 0.020 0.055 7.675 7,400 16 13.8 6,35 47.2 0.046 0.138 c 0.020 a 0.080 9.765 9,173 17 14.9 6,29 47.0 0.054 0,103 < 0.023 < 0A70 7.955 7.768 18 13.3 5,92 48.9 0,045 0.143 c 0.020 c 0.021 6,938 7.028 19 15-6 5,94 48.6 0,052 0,085 a 0,020 < 0.033 9,233 8,998 20 13.6 6.25 45.4 0,055 0,115 < 0.020 c 0.010 12,025 11.963 Maximum 15.6 7,06 59.0 121 36.70 0.113 0-652 0.033 0,091 12,025 11.963 Minimum 9.5 6.92 39.0 42 0.16 0,030 < 0,050 0.020 c 0.010 1,081 1.198 Average 12.6 6.46 49.6 70 2,98 0.055 0.133 0,023 0.034 5.435 5.511 #Tests 40 40 40 30 31 40 40 30 38 40 40 Site: GW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 1981 To: 2020 Total Fecal/ Fecal TD5 EC Chloride COD 504 Color Coll E.coli Strop Year mg/L umhos mg/L mg1L mg/L Units MPN MPN MPN Comments 81 237 351 45.0 2 c 5 5.6 a 2.2 82 206 326 3 7.7 c 2.2 83 188 303 44.0 2 c 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 c 5 < 2.2 a 2.2 < 2.2 87 211 344 45.6 3 < 5 <22 c 2.2 c 2.2 88 221 365 51.3 6 < 5 5.1 a 2.2 89 242 389 54.0 5 < 5 <2.0 c 2.0 90 234 379 482 c 5 c 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 a 5 3.8 a 2.0 94 193 319 39.1 a 5 4 4.3 a 2.0 95 181 303 33-0 6 5 5.8 c 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 c 5 < 5 52 c 1.1 99 146 230 20.9 a 5 a 5 4.9 a 1.1 00 161 252 26.0 c 5 9.54 < 5 1.1 a 1.1 01 160 251 26.9 a 5 9.63 5 1 A < 1.1 02 178 276 312 < 5 10.79 5 12 c 1.1 03 176 275 33.2 5 10.99 13 1.3 c 1.1 04 177 271 32.6 5 11.72 5 1.6 c 1.1 05 192 282 37.0 a 5 12.11 a 5 2.7 a 1.1 06 209 307 38.7 6 12.95 c 5 8.3 < 1.1 07 205 317 37.3 a 5 14.64 8 7.1 a 1.1 08 192 300 35A < 5 14.71 5 3.9 < 1.1 09 185 291 34.3 < 5 13.18 c 5 3.6 < 1.1 10 186 288 32.6 9 13.89 a 5 3.7 a 1.1 11 190 300 34.1 6 12.B0 a 5 2.3 a 1.1 12 195 294 35.8 14.05 5 < 1.1 c 1.1 13 193 296 35.5 16.05 1.9 a 1.1 14 185 285 34.5 19.09 < 1.1 c 1.1 15 192 311 40.6 18.43 a 1 a 1 16 208 327 43.8 20.03 < 1 < 1 17 209 321 42.0 17.08 c 1 c 1 18 196 309 36.8 13.08 a 1 < 1 19 211 335 40.7 12.45 < 1 < 1 20 225 342 42.3 11.80 < 1 c 1 Maximum 242 389 54.0 13 20.03 13 14.5 6.8 900 Minimum 146 230 20.9 1 9.54 4 < 1 c 1 2.2 Average 196 309 37.9 5 13.76 5 3.8 1.8 20.7 #Tests 40 40 39 31 21 31 40 40 5 Site GW-08 f Nitrate-Nitrogen Chlorides 10 100 9 90 8 80 7 70 5 60AI — £ 50 4 40 — — 3 30 2 20 1 10 - - - 0 81 B�S961!}B6lI78L 69909192939 9590479E 9900010I 030i 050E 07 08 09 1011 1213 t4 15 16 17 181l20 O 81 82 83 84 85 86 61 BB 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 1415 16 17 1819 20 Nitrate Linear(Nitrate) Chloride Linear(Chloride) Total Dissolved Solids JDS) Total Coliform Bacteria 500 25 — I 400 20 { I J I 300 E 15 - � 4 E a 200 - a 10 100 5 — - 0 0 61 82 83 64 66 86 87 8e 89 90 91 92 98 94 95 96 97 90 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 6I u a3 6.4 a4 E6 V 43 E4 90 91 92 93 9a 9596 97 94"07 01 02 004050607 06 09 10 1 t 1213 14 Is 15 17 16 1920 tTI75 Linear(TDS) t—Total Coliforms Linear(Total Coliforms) Annual Metal Report G W-08 Arant Ranch house Ca K Mg Na Ag Al As 6a Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sh Se TI V In 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 a2 [2 [2 [2 182 314 [0.2 <20 [2 2 [2.5 ¢2 <10 [1 C2 20 6/12/2007 15.7 4.00 5.47 37.2 <10 <20 C2 47 ci <0.5 c1 183 211 <0.2 31.4 C2 c5 <2.5 c1 C5 ai a3 149 5/18/2008 16.4 4.12 5.02 35.7 <10 <20 C2 48 [1 a0.5 C1 <20 267 [0.2 <20 [2 C5 a2.5 [1 C5 [1 [3 56.3 6/9/2009 14.0 3.79 4.80 33.7 <10 <20 C2 40 C1 c0.5 C1 21 105 [0.2 <20 c2 c5 [2.5 [1 C5 C1 C3 18.3 6/8/2010 15.0 3.50 5.10 33.0 C0.5 <20 C1 41 C1 [0.5 a1 23 84 a0.2 2.1 [2 C5 1.1 ai C5 C1 [3 <20 6/1/2011 15.6 3.75 5.77 37.5 C0.5 <20 C1 42.7 C1 C0.5 C1 77.8 490 [0.2 14 [2 C5 3.81 ai C5 [1 [3 <20 7/5/2012 11.8 3.52 4.13 30.7 <10 <20 C1 34.8 C1 C0.5 C1 36.1 <50 [0.2 <20 a2 C5 [2.5 [1 C5 [1 <10 5/11/2013 14.4 3.84 4.70 35.1 7/8/2014 14.1 3.72 4.91 35.8 C0.5 <20 1.14 38.3 C1 a0.5 C1 13.9 <20 C0.2 [2 C2 C5 a0.5 C1 C5 [1 3.32 68.1 8/18/2015 13.8 3.61 4.92 33.9 C0.5 <20 [1 41.0 C1 [0.5 C1 13.8 <20 [0.2 [2 C2 C5 [0.5 C1 C5 [1 [3 76.1 8/16/2016 14.3 3.58 5.12 34.4 c0.5 <20 C1 39.8 C1 [0.5 C1 5.67 <20 [0.2 <2 a2 C5 [0.5 C1 c5 [1 [3 75.9 6/8/2017 14.4 3.67 5.31 35.7 C0.5 <20 C1 45.4 C1 C0.5 C1 16.9 23.8 [0.2 2.63 [2 C5 [0.5 <1 C5 C1 C3 32 9/18/2018 15.5 3.47 5.10 34.6 C0.5 <20 C1 46.5 C1 [0.5 a1 45.3 23.8 a0.2 2.63 [2 C5 [0.5 [1 C5 [1 [3 6/6/2019 17.2 3.88 5.78 39.2 C0.5 <20 C1 52.1 C1 C0.5 C1 31.1 25.3 [0.2 2.63 [2 C5 [0.5 a1 C5 C1 C3 <20 6/15/2020 17.5 3.71 5.80 37.2 C0.5 <20 C1 54.1 C1 [0.5 C1 30.2 52.2 c0.2 3.26 a2 C5 6.90 [1 C5 C1 C3 <20 Site: GW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date C pH ME mg1L NTU mg1L mg1L mg/L mg1L mg/L mg/L 02/11/20 11.3 6.78 69.7 0.D49 < 0.050 ¢ 0.020 c 0.010 0.493 0.460 05/27/20 17.2 7.19 70.0 0.042 < 3.10 < 0.020 < 0.010 0.502 0.50 08/08/20 21.1 7.04 58.9 0.048 ¢ 0.10 < 0.020 a 0.010 0A84 0.48 11/12/20 13A 7.21 70.0 0.044 < 0.10 < 0.020 < 0.010 0.501 0.50 Maximum 21 A 7.21 70.0 0.049 < 0.100 < 0.020 < 0.010 0.502 0.500 Minimum 11.3 6.78 58.9 0.042 < 0.050 < 0.020 < 0.010 0.484 0.460 Average 15.8 7.06 67.2 0.046 < 0.088 ¢ 0.020 r 0.010 0.495 0.485 #Tests 4 4 4 0 0 4 4 4 4 4 4 Site: GWA 1 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Total Fecal TD5 EC Chloride COD SO4 Color Coli E. soli 5trep Date mg1L umhos mglL mg1L mg1L Units MPN MPN MPN Comments 02/11/20 113 144 0.964 0.696 < 1 < 1 05/27/20 97 136 1.21 0.821 < 1 < 1 08/08120 106 139 1.04 0.767 < 1 a 1 11/12/20 112 147 1.D8 0.746 < 1 < 1 Maximum 113 147 1.21 0.82 < 1 a 1 Minimum 97 136 0.964 0.696 < 1 < 1 Average 107 142 1.07 0.758 < 1 < 1 #Tests 4 4 4 0 4 0 4 4 D Site: OW11 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 1981 To: 2020 Temp Alk Hard Tur6 Total P TKN NH,-N NO2-N NO3-N Total N Year C pH m IL m IL NTU m IL m IL m IL m IL m IL m IL 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 0269 0.210 0.010 0250 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 0A26 0.117 < 0.021 < 0.010 0.421 0.549 99 14.8 6.23 46.0 40 0.14 0.022 0.106 a 0.020 a 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 0A48 0.131 < 0.020 < 0.010 0.454 0.600 02 14.5 7.05 77.0 56 0.02 0.058 0.178 a 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 14.0 723 73.0 56 0.08 0.054 0.110 a 0.010 0.505 0.624 05 14.9 7.10 73.9 56 0.22 0A40 < 0.083 < 0.010 0.469 0.558 06 15.0 7.11 72A 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 a 0.020 a 0.010 0.520 0.514 16 14.5 6,76 70.9 0.053 a 0.063 < 0.020 a 0.010 0.477 0.480 17 14.5 7.19 71.7 0.056 c 0.075 < 0.020 < 0.010 0.472 0.402 18 13.6 6.89 69.1 0.045 0.063 a 0.020 a 0.013 0.478 0.475 19 13.4 6.73 70.0 0.043 0.075 a 0.020 < 0.010 0.510 0.516 20 15.8 7.06 67.2 0.046 < 0.088 a 0.020 a 0.010 0.495 0.485 Maximum 16.2 7.26 77.0 60 1.76 0.058 0269 0.210 0.013 1290 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 58A 44 0.26 0.039 0.081 0.029 0.010 0.481 0.541 #Tests 40 40 40 30 30 40 40 30 38 40 40 Site: GW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 1981 To: 2020 Total Fecal l Fecal Tay EC Chloride COD SO4 Color Coll E.coli 5trep Year mg/L umhos mg1L mg)L mg/L Units MPN MPN MPN Comments 81 82 90 a 1 < 2.2 < 2.2 82 81 106 1 ¢ 2.2 a 2.2 83 60 99 3.000 2 8 < 2.2 < 22 84 65 96 2.000 1 a 5 a 2.2 a 2.2 85 68 96 1.500 1 c 5 < 2.2 c 22 86 67 96 1.400 1 a 5 a 2.2 a 2.2 87 73 92 1.100 3 c 5 < 2.2 < 2.2 88 74 96 1.100 5 < 5 a 2.2 < 2.2 89 71 95 1.200 6 < 5 < 2.0 < 2.0 90 79 94 1.000 a5 a5 < 2.0 < 2.0 91 75 94 1.000 < 5 < 5 < 2.0 < 2.0 92 72 95 1.000 < 5 a5 a2.0 a2.0 93 70 87 1.00 < 5 < 5 < 2.0 < 2.0 94 70 91 0.900 < 5 4 < 2.0 c 2.0 95 68 83 0.900 a5 a5 a2.0 a2.0 96 73 90 0.900 2 5 1.2 12 97 77 96 1.30 4 5 1.0 1.0 98 81 101 0.900 < 5 a5 a1.1 a1.1 99 78 99 1 A0 < 5 c 5 < 1.1 c 1.1 00 95 120 0.900 < 5 0.850 < 5 a 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 a5 < 1.1 < 1.1 03 118 146 0.754 < 5 0.772 a 5 < 1.1 c 1.1 04 117 144 0.740 < 5 0.783 < 5 < 1.1 c 1.1 05 117 138 0.796 < 5 0.939 a 5 a 1.1 a 1.1 06 116 139 0.695 c 6 0.752 a 5 < 1.1 c 1.1 07 116 141 0.715 a5 0.745 a5 a1.1 a1.1 08 117 139 0.988 c 5 0.766 c 5 < 1.1 c 1.1 09 115 142 0.909 a 5 0.751 a 5 a 1.1 < 1.1 10 117 145 0.788 11 0.847 c 5 c 1.1 c 1.1 11 113 145 0.771 6 0.678 a 5 a 1.1 r 1.1 12 114 142 0.838 0.710 < 5 < 1.1 c 1.1 13 116 141 0.762 0.654 a < 1.1 r 1.1 14 113 145 0.953 0.747 < 1.1 < 1.1 15 118 147 1.01 0.722 72 < 1 16 117 149 0.971 0.774 a 1 r 1 17 118 142 1.02 0.740 < 1 < 1 18 120 140 1.06 0.970 a 1 r 1 19 110 146 1.08 0.854 c 1 c 1 20 107 142 1.07 0.758 a 1 a 1 Maximum 120 151 3.000 11 1.310 8 7.2 2.2 Minimum 60 83 0.695 r 1 0-654 4 c 1 ¢ 1 Average 95 120 1.040 4 0.805 5 1.6 1.5 #Tests 40 40 38 31 21 30 40 40 0 Site GW-11 Nitrate-Nitrogen Chlorides 5 50 4 40 JI 3 30 J J £ E 2 20 1 ' 10 0 8182878465868766699091929394959697989900010203040506D7D6091D11121314151617161920 0 8182638465B6 87 88 89 90 91 92 43 94 95 96 97 98 99 00 01 D2 03 04 05 06 07 06D9 10 11 12 13 14 15 16 17 18 19 20 Nitrate Linear[Nitrate] Chloride Linear(Chloride) Total Dissolved Solids(TES) Total Coliform Bacteria 500 25 400 20 300 E 15 J G E 200 a 10 100 5 . 0 B1 82 83 84 85 8687 08 89 90 91 92 93 94 95 96 97 9B 990001 020304050SG708 09 10 11 12 13 1415 16 17181,220 0 61 B283 B4 85 86 87 88 89 90 91 92 93 94 95 96 97 9899 00 01 62D30405DG 0706 D91011121314151517181920 TOS Linear(rDS) - Total Colifonns 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 Lm Lm Lm L u L u L u L u L u9jL 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 C2 a2 <10 C2 C2 30.2 83.3 <0.2 <20 <2 C2 C2.5 <10 a2 <1 2 95 6/12/2007 13.4 1.59 4.86 9.13 <20 C2 31 [1 <10 [0.5 C1 40.2 <50 C0.2 <20 C2 C5 [2.5 C5 [1 [1 [3 85.8 6/18/2008 15.4 1.62 4.59 10.2 <20 c2 34 cl <10 <0.5 c1 <20 <50 c0.2 <20 C2 C5 <2.5 c5 C1 ci c3 52.8 6/9J2009 13.4 1.51 4.94 9.83 <20 C2 32 [1 <10 [0.5 C1 28 <50 C0.2 <20 C2 C5 a2.5 C5 C1 [1 [3 47.7 6/8/2010 14.0 1.50 5.20 10.0 <20 C1 32 [1 [0.5 [0.5 1.1 11 <20 C0.2 C2 C2 C5 [0.5 C5 C1 [1 [3 45 6/1J2011 13.6 1.64 5.35 8.99 <20 C1 28.6 [1 [0.5 a0.5 C1 23.7 <20 C0.2 C2 C2 C5 0.87 C5 C1 [1 [3 92.7 7/5/2012 12.3 1.59 4.34 8.72 <20 C1 31.2 a1 <10 [0.5 C1 81.9 <50 c0.2 <20 C2 C5 [2.5 C5 C1 <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 C1 35.1 [1 [0.5 a0.5 C1 33.1 <20 C0.2 [2 C2 C5 a0.5 C5 C1 [1 [3 60.7 7/15/2015 14.1 1.58 5.07 9.25 <20 C1 29.4 [1 [0.5 [0.5 C1 17.6 <20 C0.2 [2 C2 C5 [0.5 C5 C1 <1 [3 51.1 8/10/2016 13.1 1.52 4.85 8.64 <20 C1 29.3 a1 a0.5 <0.5 C1 22 <20 c0.2 <2 c2 C5 c0.5 c5 ci <1 <3 44.8 7/27/2017 12.6 1.55 4.54 8.01 <20 C1 28.6 [1 [0.5 a0.5 C1 21 <20 C0.2 [2 C2 C5 a0.5 C5 C1 [1 [3 30.9 8/29/2018 13.4 1.31 4.80 9.00 <20 C1 30.6 a1 [0.5 [0.5 C1 28.6 <20 C0.2 a2 C2 C5 [0.5 C5 C1 [1 a3 42.1 8/14/2019 13.2 1.38 4.66 8.74 <20 C1 30.6 [1 [0.5 a0.5 C1 22.7 <20 [0.2 [2 [2 C5 [0.5 a5 C1 a1 [3 33.0 8/8/2020 13.2 1.23 4.68 8.48 <20 C1 C1 30.8 [0.5 [0.5 C1 21.4 <20 [0.2 [2 a2 C5 [0.5 [5 C1 [1 [3 29.4 Site: GW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT GW-17 ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Temp Alk Hard Turb Total P TKN NH3-N NO,-N NOS-N Total N TDS Date C pH mg1L mg/L NTU mg1L mg1L mg1L mg1L mglL mg1L mglL 2/11/2020 10.5 6.25 62.5 0.017 < 0.050 r 0.020 < 0.010 0.553 0.553 101 5/27/2020 12.4 6.48 58.6 0.032 < 0.10 < 0.020 < 0.010 1.18 1.2 102 8/8/2020 14.4 6.66 69.4 0.032 0.12 < 0.020 < 0.020 1.07 1.2 89 11/9/2020 11.1 6.25 59.3 0.022 a 0.10 r 0.020 < 0.020 0.699 0.70 109 Maximum 14.4 0,60 69.4 0.032 0.120 c 0.020 < 0.020 1.180 1.20 109 Minimum 10.5 6.25 58.6 0.017 < 0.05 < 0.020 < 0.010 0.553 0.553 89 Average 12.1 6.41 62.5 0.026 0.093 r 0.020 < 0.015 0.876 0 913 100 #Tests 4 4 4 0 0 4 4 4 4 4 4 4 Site: SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2020 Total Fecal EC Chloride COD SO4 Color Coli E. coli Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 2/11/2020 137 1.59 0.712 < 1 < 1 5/27/2020 126 1.90 0.978 < 1 < 1 8/8/2020 131 1.84 1.08 < 1 < 1 11/9/2020 130 1.60 0.852 < 1 < 1 Maximum 137 1.90 1.08 < 1 < 1 Minimum 126 1.59 < 0.71 < 1 < 1 Average 131 1.73 0.91 < 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: 2020 Temp Alk Hard Turb Total P TKN NH,N NO2-N NO3-N Total N Year C pH mg/L mg/L NTU mg1L mg/L mg/L m91L mg/L mg/L 14 13.6 6.52 66.5 0.023 0.064 0.038 < 0.010 0.417 0A45 15 13.1 6.55 66.2 0.019 0.057 0.022 < 0.010 0.667 a.607 16 13.2 6,48 66.8 0.027 0.080 0.032 < 0.010 0.407 0A33 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 a 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 Maximum 14.6 6.63 68.0 0.029 0.156 0.041 ¢ 0.015 0.876 0.913 Minimum 12.1 6.41 62.5 0.019 0.057 < 0.020 < 0.010 0.365 0.394 Average 13.0 6.51 65.3 0.024 0.088 0.031 r 0.012 0.561 0.578 #Tests 7 7 7 0 0 7 7 7 7 7 7 Site: GW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2014 To: 2020 Total Fecal! Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg1L mg/L mg/L Units MPN MPN MPN Comments 14 111 147 3.55 1.74 < 1.1 < 1.1 Well installed in 2014 15 110 150 2.25 1.71 < 1 < 1 16 107 156 2.13 1.33 c 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 Maximum 111 156 3.55 1.98 < 1.1 < 1.1 Minimum 93 131 1.73 0.82 < 1 < 1 Average 104 143 2.16 1.37 < 1 < 1 #Tests 7 7 7 0 7 0 7 7 0 Site C111rf-17 Nitrate-Nitrogen Chlorides 5 50 4 40 3 30 CO cc J J 2 20 1 10 0 0 14 15 15 17 18 19 20 14 15 16 17 18 19 20 -NitraTe Linear(Nitrate) chi orlde -Linear(Chloride) Total Dissolved Solids (TDS) Total Coliform Bacteria 500 25 400 20 300 E 15 CID CD J C E 200 a 10 100 5 0 0 14 15 16 17 1e 19 20 14 15 16 17 is 19 20 TD5 Linear JDS] Total Coldorrns Linear(Total Coliforns} 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 Me Ni Pb Sb Se TI V In mg/L mgJL 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 c2 52 <2 <2 [2 <2 <2 360 0.2 37 [2 <2 <10 c2 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 a0.2 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 c2 [5 [0.5 a5 [1 [1 c3 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 a1 [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 a5 [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 a5 a0.5 [5 [1 [1 <3 134 8/8/2020 12.0 1.30 3.29 9.02 <20 c1 [1 46.5 [0.5 [0.5 <1 a2 172 a0.2 7.21 <2 [5 [0.5 [5 <1 a1 a3 135 ALPINE COUNTY SURFACEWATERS Site: SW-01 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson R Woodfords ALPINE COUNTY SURFACEWATER QUALITY DATA 2020 Temp Alkalinity Turbidity SS TD5 EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO,-N Date C pH mg1L NTU mg/L mg/L umhos mg/L moll- mg/L mg/L m2lL mg/L mg1L mg1L mg1L 01103/20 0.8 7.31 35.4 0.72 0.60 47 79 1.84 0.014 < 0.010 < 0.10 a 0.020 c 0.010 0.012 02/05/20 0.7 7.61 34.4 0.50 0.10 63 79 2.28 0.015 < 0.010 0.134 < 0.020 < 0.010 0.010 03/03120 1.2 8.61 0.76 76.1 2.22 < 0.010 < 0.010 0.139 = 0.020 < 0.010 0.010 03/04/20 2.2 7.83 36.0 0.91 0.98 65 76.5 04/01/20 3.2 7.90 30.5 1.2 2.23 56 73 3.53 0.015 = 0.010 0.132 < 0.020 < 0.010 0.010 05/12/20 5.2 7.54 20.6 2.6 6-84 37 39 0.828 0.021 0.019 0.81 < 0 020 < 0.010 0.010 06/18/20 10.9 7.46 27.8 1.1 2.65 74 55.0 0.851 0.021 ¢ 0.010 0.66 < 0.020 < 0.010 0 010 07/01/20 11.8 7.75 31.9 0.70 1.57 46 64 0.942 0.02D 0.014 028 < 0 020 < 0.01 D 0.01 D 081D5/20 13.5 7.10 37.1 0.50 1.47 63 77.8 1.26 0.023 0.012 < 0.10 < D.020 < 0.010 0.011 09/03/20 12.1 6.53 38.9 0.38 0.78 57 80 1.24 0.014 = 0.010 0.10 < 0.020 < D 01 D 0.010 10/13/20 9.6 7.65 38.3 0.42 1.26 54 75.2 1.25 0.011 < 0.010 D.14 < 0.020 < 0.010 0.010 11/04/20 5.9 7.81 39.1 0.41 2.10 75 75.0 124 0.032 < D.010 < 010 < 0 020 < 0.010 0.010 12/01/20 1.7 8.03 37.4 0.59 2.18 62 78.9 1.42 0.016 0.012 020 < 0.020 < 0.010 0.010 Maximum 13.5 8.61 39.1 2.60 6.84 75 80 3.53 0.032 0.019 0.810 < 0 020 < 0.D10 0.012 Minimum 0.7 6.53 20.6 0.38 0.10 37 39 0.83 a 0.010 < 0.010 < 0.100 < 0.020 < 0.D10 0-010 Average 6.1 7.63 34.0 0.83 1.90 58 71 1.58 0.018 0.011 0.241 < 0.020 < 0.010 0.010 #Tests 13 13 12 13 12 12 13 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 2020 Oil& Coliforms Fecal <--------Blue Green Algae------>Single Hard- ToLa1 N GOD BOD Grease Ca Mg Na 5AR Na Total E.coli Steep Colonies Filaments FilamamentCells ❑.0. SO4 ness Date mg/L mg1L mg1L mg1L mg1L mglL m91L % MPN MPN MPN # cells # cells # um #cells mg1L mg1L mg1L 01/03/20 0.102 32.3 2 12.6 1.92 02/05/20 0.134 29.2 1 11.7 2.18 03/03/20 0.139 24.3 a 1.0 11.7 2.28 03/04/20 11.2 04/01/20 0.132 65.7 1 11.2 2.11 05/12/20 0.81 115 a 1.0 12.7 1.01 06/18/20 0.66 138 2.0 9.20 1.19 07/01/20 0.28 119 6.3 8.77 1.31 08/05/20 < 0.10 214 2.0 8.53 1.64 09/03/20 0.10 387 1.0 11.61 1.68 10/13/20 0.14 172.0 1.0 9.5 178 11/04/20 a 0.10 55 3.1 10.2 1.74 12/01/20 0.20 52 2 11.50 2.02 Maximum 0.810 387 6.3 0 0 0 0 0 0 0 12.7 2.28 Minimum ¢ 0.100 24.3 < 1 0 0 0 0 0 0 0 8.53 1.01 Average 0.241 117 2,0 10.80 1.74 #Tests 12 0 0 0 0 0 0 0 0 12 12 0 0 0 0 0 0 0 0 13 12 0 Site. 5W-01 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream Carson R Wood fords ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2020 Oil 8 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PGQ-P Baron K TKN NH;;-N NO,-N NO,-N Total N COD HO❑ Grease Year C pH mg1L NTU mglL mg1L umhos mg1L mr11L mglL mg1L mg1 mg1L m91L mo_!L mg1L mg1L mWL mgfL mglL 81 8 1 7,70 32 0.58 2 56 71 1 3 0.02 001 1.30 0,17 004 0.37 5 1 1 82 52 7.58 25 1.70 B 46 54 0.02 0.01 0.92 009 002 0.17 6 1 G 1 83 61 7.67 27 2.07 7 46 56 0.5 002 002 1.03 013 002 c 001 002 017 5 1 G 1 84 57 7.40 30 1.60 5 49 58 0.7 003 ❑03 1.16 0.22 007 < 001 001 0.24 7 1 c 1 85 55 7.69 33 1.2D 3 48 65 0.7 0.02 029 1.27 0.14 003 4 0.01 ❑02 0.17 4 1 c 1 86 47 7.64 27 1 49 6 51 57 0.8 0.03 002 1.10 0.13 0.03 a 001 ❑02 016 4 1 < 1 87 68 7.18 35 0.66 2 55 73 0.8 0 02 0.01 1 45 D.15 003 a 001 ❑01 D.17 4 1 < 1 88 70 7.07 35 0.73 2 56 75 1 0 0.01 0,30 129 D 15 0 03 a 001 002 D.18 5 1 c 1 89 57 7.57 30 1.49 5.5 49 71 1.3 002 002 187 015 0 03 c ❑01 003 0.20 7 1 1 c 1 90 74 7.68 33 0.97 4.2 53 80 1.1 0.02 0.01 0.D2 1.34 0.11 0 02 < ❑01 002 0.15 5 1 0 c 1 91 7.8 7.71 33 1.37 5.2 53 75 1.2 0.03 0.01 0,02 1.32 D 13 0 03 001 003 0.17 9 1 1 < 1 92 8.0 7,99 34 0.90 2.3 58 81 1.2 002 0.01 D.D2 1.27 0.14 0 03 001 002 0.17 8 1 3 1 93 62 7.95 30 1.67 5.8 53 88 1.4 003 0.01 0.02 1.20 0_33 003 001 003 0.36 11 1 4 < 1 94 64 7.61 34 0.71 21 56 78 1.1 0.02 0.01 0.02 1.35 0.19 003 001 D 01 0.21 5 1 0 1 95 5.3 7.52 27 1.68 10.8 49 64 1.2 0.03 D_01 0.02 1.23 0.20 004 001 0.02 0.23 8 1 3 1 96 6.5 7.47 28 ill 4.8 53 61 1.0 0,02 0.01 0.01 1.20 021 0.02 D 01 004 026 5 1 1 1 97 60 7.24 29 0.83 2.1 49 52 1.0 0.07 0.01 0.01 1.21 0.19 005 001 D 09 029 5 1 0 4 98 51 687 29 1.28 4.4 49 62 1.3 003 0 01 0.02 1.21 018 003 001 003 0 22 5 1 0 < 1 99 59 7.17 29 0.66 2.7 53 70 1.4 002 c 0.01 0.01 1 33 0.17 003 < D 01 003 021 < 5 1 1 DO 58 7.24 31 1.60 9.1 54 51 1.3 003 0 01 0.02 1.32 0.20 0.02 < D D7 001 0.22 5 1 2 Dl B.3 7.10 33 1.42 3.8 55 72 1A 0.02 0,02 0 01 1.41 0.16 0 02 c 001 D D1 019 15 1 1 02 5 B 7.38 32 1 48 2.8 57 70 1.7 0.02 0.01 0 01 1.30 024 ❑03 c Dal 002 026 5 07 03 51 748 31 5.09 10.9 54 67 1 7 002 0.01 0.02 1,29 0.18 ❑03 0 Dl 002 021 5 0.9 04 54 7.25 31 4.28 9.5 55 66 1.8 0,03 0.02 0.02 1.28 0.16 004 001 0 02 0.18 9 ❑8 05 4.9 7 35 32 2.13 5.7 57 55 2.2 0.02 0,01 0.02 1.28 015 002 < 0 01 0 03 019 12 1 2 06 5.1 706 26 294 6.3 49 40 1 4 0.02 0.01 0.02 1 10 Oil ❑03 < 0 01 0 02 013 10 1 2 07 57 728 31 1.77 3.8 57 65 1 A 001 0.01 001 136 025 002 r 001 002 0.28 9 1 1 08 66 7.87 32 144 2.4 54 69 1.6 0 01 0.01 0.01 1.33 014 002 c 001 001 0.17 9 1.0 09 5.D 743 31 3.17 44 54 66 1.3 0.02 0.01 0.01 1.27 0.17 a 0.02 < 0.01 001 0.19 8 0.9 10 45 7.34 30 2.68 5.1 53 66 12 0.02 0.01 c O V 1 30 009 a 002 c 001 001 012 12 1 8 11 4.1 753 29 322 5.9 53 59 1.0 0.02 0.01 0.01 1 16 009 < 004 c 0.01 003 0.12 7 1 3 12 58 698 34 1.56 2.6 66 70 1 1 002 0.01 001 142 0.13 D.02 < 001 001 0.16 1 4 13 5.8 691 32 164 2,7 63 67 1.1 D D2 0.01 001 1 20 014 0.03 < 0.01 001 0.14 1 1 14 5.8 727 35 1.08 2.7 68 78 1.3 0.02 0.01 0.01 1.38 0.12 003 < 001 001 012 1 1 15 6.5 6.78 35 122 2.3 58 76 1 2 0.02 0.01 0.01 1.34 0.12 002 a 001 001 ❑12 16 5.5 696 30 224 5.5 57 66 1 4 003 0.01 1 23 0.14 002 < 001 003 017 17 56 710 26 2,57 6.0 51 58 1.0 0.03 0,01 1.04 014 D 02 a 001 001 0.15 18 6.7 7.50 33 1.35 2.4 54 67 1 1 0.03 0.01 0.27 002 a 001 001 0.28 19 5.6 7.33 31 1.83 2.7 51 67 1.9 0.02 0,02 ❑12 < 0.02 c 001 001 0.13 20 6.1 763 34 0.83 1,9 56 71 1.6 0.02 0.01 024 c D 02 a 001 001 0.24 Maximum 8.1 7.99 35 5.09 10.9 58 81 2.2 0.07 0.02 0.30 1 87 0.33 007 001 009 0.37 15 1 8 4 Minimum 41 6.78 25 066 1.9 46 40 0.5 0.01 < 0.01 0.01 0-92 009 c 0.02 < 0.01 0.01 0.12 4 D 7 1 Average 59 7.39 31 1.71 4.5 53 66 1.2 0.02 001 003 127 0.16 003 0.01 0.02 0.20 7 1 1 1 0 Tests 40 40 40 40 40 40 40 39 40 31 35 37 40 40 38 38 40 31 34 18 Site: SW-01 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson R Woodfords ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1991 To: 2020 Coliforms Fecal 1 Fecal Green Algae----------------------------> Single Hard- Ca Mg Na SAR Na Total E,Coli Strep c____Colonies-- K -Filaments---- -Filamaments---> Cells ❑-0. SO4 ness Year mg/L mglL mWL % MPN MPN MPN # cells 0 Cells # um *cells mgJL mglL 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 9.67 c 0.01 25 84 602 1 71 2.71 0.25 19.7 419 55 48 293 4 61 970 226 2,220 52 938 117 25 85 669 1 64 3,11 0.27 20.1 155 45 48 0 0 285 43 196 10 0 9 92 073 27 86 560 1.64 2.55 0.24 19.4 175 43 100 0 0 45 92 92 3 69 1042 957 23 87 731 2.03 3.54 0.29 21.1 140 74 37 0 0 46 623 139 3 27,077 9.79 488 27 88 7.8B 2.20 3,59 0.29 20.7 294 30 43 0 0 0 0 1,085 54 0 1171 361 89 575 1 82 2.93 0.25 18.7 271 48 285 0 0 0 0 439 22 231 1023 362 90 751 2.05 3,48 0,29 20.5 163 50 156 0 0 0 0 0 0 0 9,25 397 25 91 735 200 3.43 028 20.7 153 37 40 0 0 8 115 0 0 0 8,94 4.08 23 92 8.12 1.95 3.55 0,28 20.3 184 26 130 0 0 0 0 0 0 0 9-88 4.15 26 93 7,22 1-88 3,33 0-28 20A 175 41 40 0 0 15 50 0 0 0 1002 386 22 94 756 1.95 3-82 0.31 22.2 118 32 37 0 0 0 4 0 0 0 9 94 470 25 95 558 1.81 3.28 0.28 21.4 73 31 35 0 0 0 33 0 0 0 1024 432 21 96 6.38 1.68 3,11 0.27 21.4 142 33 35 0 0 0 0 0 0 0 10-56 234 22 97 6.63 1.83 3,30 D.29 21.7 75 30 130 0 0 0 0 0 0 0 10-75 2.81 25 98 6.20 1-68 3,14 0-26 21.9 57 31 50 0 0 29 179 0 0 0 944 227 19 99 6,80 1.81 3,47 0.31 22.5 110 32 130 0 0 3 29 0 0 0 1010 237 00 5 92 1.84 3.46 0.32 23.7 38 28 c 30 0 0 0 0 0 0 0 10.24 2 3D 01 7.20 1,97 3,84 0.32 23.0 44 16 c 30 0 0 0 0 0 0 0 9-58 202 02 6.93 1.90 3,86 0.33 23-7 37 9 107 0 0 4 113 0 0 0 9 37 216 03 6.91 1,90 3,63 0.31 22.7 65 21 21 0 0 0 0 0 0 0 1006 204 04 6 7D 1.92 3,64 0,31 22.4 60 5 22 0 0 D 0 0 0 0 9.93 1 99 05 7 01 1.87 3.55 0 30 22.0 26 11 8 0 0 94 782 0 0 0 10.74 2.D9 06 5 98 1.64 3.08 0.26 22.2 119 54 c 3 0 0 0 0 0 0 0 1024 1.39 07 7-19 1,93 3,84 0-32 22.9 23 B < 26 0 0 0 0 0 0 0 9 59 1 85 08 727 1.90 3.79 0.32 22.7 40 4 117 0 0 0 0 0 0 0 10.30 232 09 708 1.87 3.58 0.31 22.2 244 16 4 0 0 0 0 D 0 0 1014 203 10 6 92 1.90 3.44 0.30 21.6 228 32 < 3 0 0 3 85 0 0 0 928 1.99 11 6.27 1.70 3.12 0.28 21.6 70 22 4 0 D 3 28 0 0 0 10-52 138 12 740 1.94 3.71 0,31 21.9 63 14 6 0 0 0 0 D 0 0 967 1 90 13 7 33 1 80 3.46 029 21.4 480 1 D 4 0 D 0 0 0 0 0 1052 225 14 7 84 2.03 4.05 0.33 22.8 518 25 4 0 0 0 0 D 0 0 975 218 15 828 2.08 3.96 0.32 21 A 588 7 10.44 2 22 16 727 1.81 3,55 0-30 21.9 330 3 11 69 1 94 17 6,63 1.70 3.06 0.27 21.1 218 5 1052 1 29 18 345 4 1031 1 67 19 180 3 10.47 1 66 20 117 2 10-80 1.74 Maximum 8 28 220 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 5 80 1.64 2,55 0 24 18.7 23 2 3 ❑ 0 0 0 0 0 0 894 c 0 01 19 Average 697 1,87 3,44 0.29 21.6 181 33 59 10 21 22 150 66 119 808 1012 261 24 #Tests 34 34 34 34 34 40 40 34 34 34 34 34 34 34 34 38 36 14 Site: SW-01 Nitrate-Nitrogen Total Phosphorus 05 05 04 0.4 03 0.3 J J m E E 02 0.2 01 01 00 0.0 +N11rate Linear(Nitrate) Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 10 250 s S 200 7 6 150 J a 5 m E E 4 100 —1 3 2 50 —— 1 �•.�.i� D 0 6182 83 B4 85 M 87139119 90 91 92 90 94 95 9e 97 98 99 DD 01 02 0304 DS OB MIS 0910 11 12 131415 16 171019 20 41 01 4°� 9` B� �' et da, 01 0� o1j p� per' ^� �h k9 Chlorides Linear(Chlorides) —t—TDS Linear(TOS) Site: SW-02 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek, Upper ALPINE COUNTY SURFACEWATER QUALITY DATA 2020 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NOZ-N NO3-N Date C pH mg/L NTU mg1L mg/L umhos mg1L mg/L mg/L mg/L mg/L mg1L mg/L mg/L ML 03/03/20 1.8 8.61 46.5 4.0 19.8 72 83.5 0.991 0.023 < 0.010 0.179 < 0.020 < 0.010 < 0.010 04/01/20 5.1 7.94 44.2 2.0 1.21 73 86 1.17 0.015 0.010 0.107 < 0.020 < 0.010 < 0.010 05/12/20 8.0 7.61 55.4 2.3 0.77 82 106 1.19 0.015 < 0.010 1.100 < 0.020 < 0.010 < 0.010 06/18/20 12.0 7.87 54.3 1.2 0.17 80 99.2 0.661 0.020 < 0.010 0.450 < 0.020 < 0.010 < 0.010 07/01/20 11,5 7.21 60.8 1 A 0.51 86 122 0.672 0.031 0.010 0.440 < 0.020 < 0.010 < 0.010 08/05/20 Dry 09/03/20 Dry 10/13/20 Dry 11/04/20 Dry Maximum 12.0 8.61 60.8 4.0 19.8 86 122 1.19 0.031 0.010 1.100 < 0.020 < 0.010 < 0.010 Minimum 1.8 7.21 44.2 1.2 0.17 72 83.5 0.661 0.015 < 0.010 0.107 < 0.020 < 0.010 < 0.010 Average 7.7 7.85 52.2 2.2 4.49 79 99 0.94 0.021 0.010 0.455 < 0.020 < 0.010 < 0.010 #Tests 5 5 5 5 5 5 5 5 5 5 0 0 5 5 5 5 Site: SW-02 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek, Upper ALPINE COUNTY SURFACEWATER DUALITY DATA 2020 Oil & Coliforms Fecal <-----Blue Green Algae----> Single Hard- Total N COD BO❑ Grease Ca Mg Na SAR Na Total E. coli Strep Colonies Filament:Filamar Cells D.O. SO4 ness Date mg1L mg1L mg1L mg1L mg1L mg1L mg1L % MPN MPN MPN # cells # cells # um #cells mg1L mg1L mg1L 03/03/20 0.179 69.7 2 11 A 0.600 04/01/20 0.107 83.3 4.1 11.1 0,524 05/12/20 1.1 184 22.8 6.92 < 0.50 06/18/20 0.45 411 9.7 8.61 < 0.50 07/01/20 0.44 435 57.3 5.82 < 0.50 08/05/20 09/03120 10/13/20 11/04/20 Maximum 1.100 435 57 0 0 0 0 0 0 0 11.40 0.60 Minimum 0.107 70 2 0 0 0 0 0 0 0 5.82 < 0.50 Average 0.455 237 19 8.77 0.52 #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-02 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream, Indian Creek,Upper ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2020 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH,-N NO2-N NO,N Total N COD Year C pH mg/L. NTU mg/L mg/L umhos mglL mg/L mglL mg/L mWL mg/L mgk mg/L mglL mg/L mglL 81 13.8 7.33 54 6.50 3 109 162 1 8 0.05 0 01 1 94 041 010 060 9 82 63 8.6 7.56 39 5 13 3 72 69 0.7 0.02 004 140 0.25 006 < 0.01 001 018 8 64 84 7.71 40 2.36 5 64 76 0.8 0.03 0.02 148 0.49 005 <0 01 <001 051 9 85 86 87 52 7.55 48 2.20 1 70 80 1.1 002 <001 1.50 0.17 < 002 <0.01 002 0.22 6 88 6.3 5.90 46 1.97 1 81 92 1.2 0.02 0.01 1.25 0.19 003 <001 001 020 9 89 5.9 7.47 44 286 2.0 79 94 1.3 002 0.02 1.3D 020 002 <0.01 ❑02 023 9 90 45 7.42 44 2.82 2.0 77 108 1.1 002 0.01 1.32 ❑14 002 <001 ❑01 017 8 91 79 8.10 47 4.90 2.3 81 106 17 0.03 Doi 001 1.57 0.25 003 Doi 001 0.28 9 92 90 7.52 54 4.01 4.3 90 105 14 0.05 0.01 0.02 1.51 0.28 003 0.01 002 0.31 9 93 8.7 7.51 44 3.06 1 1 80 93 1.8 0.04 0.02 0.02 1.84 036 0 D2 001 002 039 24 94 55 7.14 47 3.09 1.0 79 97 14 0.03 001 0.02 1.37 026 0 D2 001 002 029 <5 95 84 7.63 44 251 1 4 79 90 14 0.03 0.02 001 1.48 028 005 001 002 031 8 96 95 7.45 52 3.37 2.9 82 104 1.9 004 0.01 001 179 0.32 002 0.01 0.03 036 7 97 52 7.43 57 4.38 13.2 86 111 0.9 0.06 Gal 002 1.70 0.32 0.02 0.01 010 0.43 9 98 75 7,30 55 2.35 2.2 85 109 10 0-03 0.01 0.01 1.58 0.26 002 <001 ❑02 029 5 99 85 7.19 52 2.03 1.9 81 104 09 0.03 Doi 0.02 1 53 0.24 002 <0.01 ❑02 027 5 00 93 7.25 58 1.63 1.2 88 109 13 0.04 001 002 1.63 0.25 0 02 <001 <D 01 025 7 01 50 7.29 50 204 1.6 82 98 1.5 0.02 0 03 001 1.33 D.25 002 <0.01 002 027 20 02 6.9 7.14 45 2.19 3.5 78 91 1 7 0.02 0.01 0.02 1 AP 0.26 0 03 <001 D 03 030 <5 03 94 7.55 45 1.63 1.0 78 85 1.4 0.02 0.01 003 1 48 ❑22 0 02 001 Doi 024 7 04 86 7.23 45 2.17 1.5 77 89 1.4 0.02 < 0.01 002 1 45 D 21 0 03 <0.01 < 001 023 7 05 86 7.27 46 1.73 1 1 77 80 1 8 ❑02 0.01 0.02 1.35 0.28 002 <001 Doi 030 12 06 91 692 44 2.38 3.0 76 69 1.0 0.03 0.01 0.02 1 A2 016 0 02 <0.01 < 0.01 0.18 10 07 94 7.51 50 1.77 0.7 81 98 1.2 0.03 0 01 0.01 1.52 D 16 005 <001 < 0 D7 019 8 08 79 7.59 45 1.77 20 72 69 17 003 0 01 <0.01 1 59 0 15 c 002 <001 001 018 8 09 9.4 7.20 46 220 1.0 80 92 1.2 002 0 01 < 001 172 0.30 0 02 <001 < D 01 D 32 19 10 83 7.35 40 233 1.2 72 84 1.0 0.03 0 01 < 0,01 1.72 0.17 <0102 < 0.01 < 0.01 019 13 11 9.2 7.58 48 3.99 25 55 93 1.3 0.04 0.01 0.01 2.29 0.25 0.02 <0 01 0 01 028 12 12 94 7.17 55 1.72 1.6 64 105 0.7 0.03 0.01 < 001 1 53 0.18 002 <001 < 0 D7 020 13 51 6.95 44 1.34 01 75 85 09 0.04 0.01 Gal 129 0.16 002 <001 001 017 14 59 7.01 39 257 1 4 73 80 1 3 0.02 0.01 002 1,47 0.19 002 <001 001 020 15 59 6.94 41 3.20 0.4 64 87 0.9 0.02 0.01 0.01 1.44 0.22 <002 <001 0 D7 ❑22 16 97 7.10 45 203 0 e 87 101 1.7 0.03 0.01 1,54 0.19 <002 <001 < 0 01 020 17 10.0 7.18 42 1.66 0.7 70 83 1.0 0.02 0 01 1.51 0.15 002 <001 < 0 D7 ❑16 18 97 7.47 55 2.57 0.8 85 106 1.0 0.04 0.02 015 002 <001 001 ❑15 19 94 7.32 44 2.87 1 1 72 96 1.2 0.03 0.01 015 <002 <001 0.01 0.15 20 7.7 7.85 52 2.18 4.5 79 99 0.9 0.02 0.01 D.46 <002 <0.01 < 0.01 0.46 Maximum 138 8.10 58 6.50 13.2 109 162 1.9 0.06 0.03 O.D4 2.29 0.49 0.10 ❑01 010 060 24 Minimum 4.5 6.90 39 1.34 0.1 54 69 0.7 0.02 < 0 01 <0.01 125 0.14 c 002 <0 01 < 001 015 < 5 Average 8 1 7.35 47 2 69 2.2 80 95 1 3 003 0 01 0.02 1 53 0.24 0 03 0 01 002 027 10 #Tests 37 37 37 37 37 37 37 37 37 30 32 34 37 37 36 35 37 28 Site: SW-02 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream Indian Creek,Upper ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2020 Oil& Coliforms Fecal) Fecal <--------------------glue Green Algae-------------- Single Hard- BOD Grease Ca Mg Na SAR Na Total E coli $trnp <----Filaments--- ---Filamaments_- Cells ❑.O, SO4 ness Year mWL mg1L mRiL mg1L mg1L % MPH MPH MPN # cells # Cells 9 um #cells mg1L malL melt_ 81 K 1 < 1 3,820 283 2,316 5 10 37 452 0 0 2 82 83 1 < 1 336 73 33 0 0 6 32 2 30 0 885 2.34 32 84 1 < 1 7.77 1.96 448 0.37 24.8 3,140 122 180 155 105 3 5 347 209 44 a61 1.10 29 85 86 87 1 c 1 9.80 2.50 7,10 0 52 29.6 4D < 30 < 30 0 0 0 0 0 0 0 910 3.40 88 1 < 1 9.15 2,38 6.77 0 51 3D.1 107 32 90 D D 92 877 46 1 92 943 3 58 89 1.0 < 1 8.50 2-06 6.85 0 55 32.4 86 31 58 D D 79 1,968 35 213 0 928 3.77 90 12 < 1 8.77 2,15 693 054 31.9 112 30 72 0 0 0 0 ❑ 0 323 753 3.75 33 91 1 1 < 1 924 2.29 7,10 0 54 3D.9 130 40 40 D 0 0 0 0 D 0 7 41 4.35 30 92 1 4 1 10,99 2,49 8,08 057 31.2 372 73 150 5 91 86 201 0 D D 882 4.55 38 93 1.2 < 1 9.25 2.29 7.05 054 31.0 810 261 150 0 0 4 95 ❑ 0 0 815 409 28 94 1 0 < 1 9.24 2.30 7.97 0.61 33.6 753 31 90 0 0 0 0 0 D 0 813 5.04 58 95 12 1 9.08 2.15 0.15 0.48 28.9 793 243 230 0 D 0 0 0 D 0 661 4.35 30 96 1.2 1 10.77 2.67 7.07 049 27.8 1,956 529 770 0 0 0 0 0 0 D 853 293 35 97 1 1 3 1243 3.10 7,21 0.46 25.9 1,567 497 155 D 0 3 53 ❑ 0 0 874 3.36 45 98 1.0 < 1 1123 2.74 8.51 0.46 26.1 982 562 160 D 0 0 0 0 0 0 8 92 2.63 42 99 1.0 10.56 2.64 647 ❑46 26.6 863 90 < 30 D 0 0 0 0 0 0 83.4 2.99 00 0 9 1088 2.82 7A1 0 52 28.6 434 79 65 0 0 0 0 0 0 D 776 1.31 01 1 1 949 2,39 7.68 058 32.4 128 73 90 0 0 0 0 0 0 0 8.7D 0.63 02 0 8 8.02 210 772 0.64 36.0 81 13 68 0 0 41 375 0 0 0 8 55 ❑70 03 0 8 8.38 2.20 6.48 0.52 31.1 141 35 33 0 0 0 0 0 0 D 7 34 0 59 04 1 1 847 2.20 645 052 31.2 271 27 68 0 0 D 0 0 0 0 7 97 0 67 05 1 8 6.39 2.18 6.23 0 50 304 220 84 220 0 0 0 0 0 0 D 860 047 05 1 0 8,59 2.16 587 046 287 746 320 235 0 0 D 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 D 0 0 0 0 7.99 0.85 08 0.9 8.52 2.06 706 0.57 32.8 111 20 68 0 0 5 15 0 0 0 7 83 0 81 09 0 8 8.76 2.16 730 0 58 33 3 2.024 96 43 0 0 0 0 0 0 0 6 86 0.45 10 1.3 8.04 2.09 6.17 0.51 30.8 1.631 186 4 0 0 3 55 0 0 a 580 0.50 11 1,5 8,95 2.36 0.82 0.53 301 1,768 1,412 19 0 0 D 0 0 0 0 7.95 <0.50 12 14 1036 2.50 786 0.57 312 323 186 3 0 0 0 0 0 0 0 648 <D.5D 13 1.2 7.88 1.93 7,80 0.65 36.9 44 20 3 0 0 0 D 0 0 0 8 09 0 58 14 1 3 6.81 1,69 795 0.71 40.1 110 4 4 0 0 0 D 0 0 0 871 1 00 15 697 1,78 924 0,81 43.3 359 3 7.19 1.40 18 8,76 2.14 827 0.66 36.4 1,022 9 8 57 1.06 17 8,40 2.02 5,81 0.47 292 778 45 8.96 c 050 18 717 35 8 53 ¢070 19 525 117 8 82 <0 57 2D 237 19 8.77 0.52 Maximum 1.8 3 12.43 3,10 9,24 0,81 43.3 3,820 1,412 2,315 155 105 92 1,958 347 213 323 943 504 58 Minimum 0.8 1 6.81 1.59 4.48 0.37 248 40 3 3 0 0 0 0 0 0 0 5 80 043 28 Average 1 1 1 9,13 2.28 7,06 0,55 31.5 762 158 180 5 7 12 133 14 15 15 8 21 185 36 #Tests 31 15 32 32 32 32 32 37 37 31 31 31 31 31 31 31 31 36 38 11 Site: SW-02 1 Nitrate-Nitrogen Total Phosphorus I1 05 05 0.4 0.4 0.3 03 J J rn o1 E E 02 O.z 01 0.1 0.0 a 0 c` Nitrate Liinear(Nitrate) --@—Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 10 250 9 8 200 7 6 150 J J rn 5 E 4 E 100 - 3 2 - - I 50 - 0 0 8182 8384 65 BB 87 88 89 90919293 94 95 96 97 96 990001 02 03 04 13506 07(18 09 10 11 12 1314 15 18 17 18 19 20 Chlorides Linear(Chlorides) t TOS Linear{TDS) Site: SW-03 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek, Mid ALPINE COUNTY SURFACEWATER DUALITY DATA 2020 Temp Alkalinity Turbidity SS TES EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg1L NTU mg/L mg1L umhos mg/L mg1L mg1L mg1L mg1L mglL mg/L mg/L mglL 03/03/20 5.0 8.14 48.5 3.8 1.32 140 193 4.13 0.062 < 0.010 0.111 < 0.020 < 0.010 0.039 04/01/20 8.9 7.43 96.0 5.2 9.37 139 198 4.47 0.278 0.018 0.249 < 0.020 < 0.010 0.016 05/12/20 10.6 7.24 89.0 2.9 4.29 127 181 3.87 0.077 0.019 0.570 < 0.020 < 0.010 0.014 06/18/20 16.8 7.92 89.9 6.9 27.2 132 146 3.33 0.146 0.033 0.760 < 0.020 < 0.010 0.017 07/01/20 15.7 7.26 97.1 5.1 9.65 130 202 3.87 0.110 0.030 0.820 < 0.020 < 0.010 0.028 08/05/20 15.8 7.17 108 5.6 13.7 157 220 4.56 0.107 0.021 0.680 < 0.020 < 0.010 0.026 09/03/20 20.4 7.43 105 5.2 4.54 153 205 4.30 0.096 0.022 0.400 < 0.020 < 0.010 0.014 10/13/20 9.9 7.61 105 2.5 3.14 147 214 3.99 0.074 0.018 0.200 < 0.020 < 0.010 0.014 11/04/20 6A 7.89 40.1 2.6 6.20 76 83.3 1.27 0.032 < 0.010 <0.10 < 0.020 < 0.010 < 0.010 Maximum 20.4 8.14 108 6.9 27.2 157 220 4.56 0.278 0.033 0.820 < 0.020 < 0.010 0.039 Minimum 5.0 7.17 40.1 2.5 1.32 76 83.3 1.27 0.032 < 0.010 0.111 < 0.020 < 0.010 < 0.010 Average 12.2 7.57 86.5 4.4 8.82 133 182 3.75 0.109 0.020 0.474 < 0.020 < 0.010 0.020 #Tests 9 9 9 9 9 9 9 9 9 9 0 0 8 9 9 9 Site: SW-03 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek, Mid ALPINE COUNTY SURFACEWATER QUALITY DATA 2020 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 mglL 03/03/20 0.150 83.6 1.0 9.92 3.41 04/01/20 0.265 178.0 7.5 9.49 3.60 05/12/20 0.580 980 192.0 9.97 3.31 06/18/20 0.780 > 12,100 12,100 7.63 2.52 07/01/20 0.850 19,900 17,300 6.93 2.33 08/05/20 0.710 8,660 3,650 6.14 2.07 09/03/20 0.410 1,300 921 8.51 2.04 10/13/20 0.210 816 129 8.05 1.99 11/04/20 < 0.10 276 8.6 10.4 116 Maximum 0.850 19,900 17,300 0 0 0 0 0 0 0 10A0 3.6 Minimum < 0.100 84 1.0 0 0 0 0 0 0 0 6.14 1.76 Average 0.451 4,922 3,812 8.56 2.56 #Tests 9 0 0 0 0 0 0 0 0 9 9 0 0 0 0 0 0 0 0 9 9 0 Site: 5W-03 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek,Mid ALPINE COUNTY SURFACEWATER QUALITY DATA From 1981 To: 2020 Oil& Temp Alkalinity Turbidity SS TD5 EC Chloride Total P POd-P Boron K TKN NH3-N NOS N NO,-N Total N COD BOa Grease Year C pH mg1L NTU MWL_ mglL_ umhas mg/L mg1L mg1L mg1L mo1L mg1L mg1L mg1L mg/L moll- mV2L mg/L mg/L 81 97 743 67 3.70 3 229 390 3.6 0.06 0.08 314 0.34 004 1 07 7 1 1 82 101 742 62 5.15 6 158 233 0.11 0.08 3.2D 0.45 002 0.61 15 1 1 83 7.2 8.41 62 7.17 7 145 221 25.3 0.12 0.08 2 8D 046 007 c 0.01 045 0.45 14 1 c 1 84 75 747 60 42D 4 109 164 11.7 0.11 0.02 2.31 041 0 12 001 009 0.50 13 2 1 85 104 743 46 4.40 5 11❑ 125 8.4 014 0.04 3.03 046 006 <0.01 002 OAS 16 2 < 1 86 55 777 57 4.70 2 115 176 14.6 007 004 1.97 008 =002 <0.01 0.12 0.22 6 1 c 1 87 8 8 7.18 71 3.03 4 149 230 20.7 0.06 0.06 2.00 0.19 002 a 0.01 013 033 5 1 1 88 99 713 81 16.71 11 168 241 18.6 Oil 0.08 2.43 0.35 007 a 0.01 0.03 038 8 1 c 1 89 92 743 78 6.48 4.7 126 183 8.9 008 0.03 1.63 0.23 0 03 c 001 0.02 026 6 1 2 < 1 90 89 7.49 74 5.42 3.3 114 195 5.8 0.08 0.03 0.04 1.61 0.17 0 02 001 003 0.21 7 1 1 < 1 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 a 1 92 10.6 7.47 103 8.20 4.0 151 216 6.1 0.12 0.03 0.05 2 95 029 0 05 0.01 002 0.32 12 1 3 1 93 96 7.33 85 7.77 3.6 146 213 8.1 0.11 0 04 0.04 2.24 ❑38 0 04 0.01 002 0.42 14 1 8 < 1 94 99 740 104 1191 4.3 154 234 8.6 0.13 0.03 0.03 1 81 0.35 003 001 ❑02 0.38 <5 1 8 c 1 95 10.4 747 87 7.30 3.0 141 204 7.7 0.11 0.11 0.03 217 0.42 004 001 006 0.49 13 1.4 1 95 1 1.3 720 63 5.D7 5.3 97 137 3.5 0.09 0.03 0.02 1.95 034 0.03 0.01 0.06 0.41 5 1 3 1 97 9.9 7.38 83 6.68 8.4 132 192 7.3 0.11 0 03 ❑04 1.98 034 005 001 014 0.49 14 1 3 1 96 8 8 7.01 64 4.44 5.0 104 143 3.8 008 0 04 0.02 1.84 ❑.29 0.02 001 004 034 <5 1.1 < 1 99 103 702 61 5.18 3.9 97 130 2.6 0.10 0 04 0.01 1.81 ❑27 002 <001 003 032 c 5 1 0 00 107 724 74 6.81 128 115 164 3.9 0.08 0.02 0.03 1.91 0.32 0.02 <0.01 0.03 035 c 5 1 3 D1 117 721 83 2.95 3.1 121 171 3A 0.07 0.02 0.03 1.85 019 003 a 0.01 002 022 14 1 0 02 11.7 715 100 782 7.8 142 199 4.O 0.11 0.02 0.03 2.36 038 004 <0.01 0.02 0.41 i 5 1.7 03 11 6 741 83 9.23 8.5 123 155 3.4 ❑.12 0.02 ❑.03 2.10 0.34 004 001 001 037 7 1 8 04 11.2 7.21 88 7.36 8.5 130 174 3.9 0.11 0 01 0.04 207 0.28 004 <001 001 031 5 12 05 9.9 7.24 81 4.74 3.7 127 152 3.9 0.09 0 02 0.03 1.74 023 004 c 0.01 0.03 027 9 1.6 D6 9 5 708 52 9.39 12.2 90 87 2.2 0.08 0.02 005 1 45 0.17 003 c 001 002 020 7 1 3 07 104 7.49 83 4.53 54 121 157 3.2 0.08 0.02 002 206 ❑18 002 <001 001 021 5 17 08 94 7.84 70 5.07 5.4 113 155 3.2 0.12 0 04 0.02 2.08 034 004 c 001 D.01 036 9 20 09 9 3 7 58 75 4.31 2.6 115 158 2A 0.07 0.02 0.02 1 95 021 0 02 0.01 0.02 0.23 6 1 0 10 8 6 7 39 59 6.17 9.2 95 124 2.3 0.08 0.02 0.01 1.75 0.18 003 0.01 0.02 0.21 14 1 3 11 9 5 751 38 11.66 20.2 68 75 1.1 Oil 0.01 001 1 53 0.24 002 0 01 003 028 12 26 12 11 1 7 38 71 3.01 28 108 136 2.3 0.07 0.02 0.01 1 70 0.16 003 a D 01 001 018 14 13 11 5 721 57 12.35 11.5 90 115 1.7 0.08 0.03 001 1.72 025 004 <0.01 001 025 14 14 9.6 720 57 4.00 8.3 94 114 2.O 0.08 0.04 0.01 2.10 0.27 004 0.02 003 031 20 15 11.7 7.22 79 4.08 12.7 119 160 2.6 0.09 0.04 0.02 1.79 025 005 001 002 027 16 10.5 7.01 60 16.58 33.7 100 126 2.4 0.18 0 02 1.65 029 002 a 001 ❑03 032 17 12 8 699 58 6.03 4.4 94 126 2.9 0.06 0 01 1.61 019 003 a 0.01 ❑08 026 18 12 7 7 30 71 4.23 5.5 109 146 3.5 007 0 03 015 002 a 0.01 0.06 0.21 19 11 2 7.52 52.1 4.44 5.1a 87 114 2.38 0.06 0 017 0.181 c 0 020 s 0.010 0.03 0.204 20 122 757 87 442 8.8 133 182 3.8 oil 0 02 0.47 a 0.02 a 0.01 0.02 0.45 Maximum 128 841 104 16.71 33.7 229 390 25.3 018 0 11 0.08 320 047 0.12 002 0.45 107 16 26 1 Minimum 5.5 6.99 38 2.95 20 68 75 1.1 0.06 0.01 0.01 1.45 008 c 002 <0.01 001 0.18 c 5 1 0 c 1 Average 10.1 7.37 72 6.61 71 122 170 6.0 0.09 0.03 0.03 2.05 0.29 0.04 0.01 0.05 0.35 9 14 1 #Tests 40 40 40 40 40 40 40 39 40 31 35 37 40 40 38 38 40 31 34 18 Site: SW-03 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream; Indian Creek,Mid ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2020 Coliforms Fecal l Fecal = -Blue Green Algae----------------___W____, Single Hard- Ca Mg Na SAR Na Total E,ooli Strep <------Colonies-----> <---Filaments----> ---Filamaments---> Cells ❑.O. SO4 mess Year mglL MWL mg/L % MPN MPN MPN # cells # cells # um #Cells mg1L mglL mg/L 81 3,786 3.243 182 5 17 22 216 5 203 13 82 1,920 890 3,091 1,766 15,701 61 415 18 470 6.490 83 28D 150 50 4 13 6 33 3 178 10 8.55 8.77 67 84 13.50 3.80 11.35 171 32.0 930 170 190 5 3 2 2 166 14 22 8.65 3-40 53 85 10.93 2-91 8.08 0,55 28-8 12,215 12,215 135 0 0 0 0 16 17 0 7.75 167 40 86 14.80 4.30 13.80 0.74 31.2 95 40 55 0 0 0 0 0 0 2.493 9.20 1044 55 87 2007 617 18.30 0.65 31.9 127 53 73 ❑ 0 0 0 0 0 185 872 1380 67 88 20.05 6.51 18.35 0.87 32.0 1,490 1,317 2,208 ❑ 0 0 0 115 4 1.915 9.25 14.38 110 89 15.81 4,73 14,67 0,77 31-7 1,283 533 185 0 0 0 0 69 4 945 B-72 728 90 14.24 4.22 12.44 0-69 30-7 1,298 302 3,223 2 0 0 0 0 0 0 7.74 632 27 91 18.44 5.65 15.32 0.77 30.2 1,810 1,207 160 29 221 0 1 0 0 0 7.23 779 52 92 19.92 5.96 16.50 0.82 31.5 2,365 2,051 230 0 0 6 47 0 0 0 7.05 6-63 63 93 20-12 5.25 1628 0.82 31-8 1,059 704 35 41 305 2 7 0 0 0 7.51 6-76 69 94 20.83 6,22 17.63 0,85 32.4 2,299 2,109 135 0 0 0 0 0 0 0 6.14 6-56 93 95 16.92 526 14.93 0.77 312 628 645 90 0 0 0 0 0 0 0 830 687 45 96 13.62 358 9A2 D.55 27.1 1,793 211 90 0 0 0 0 0 0 0 9.56 371 42 97 16.47 5.33 14.55 0.79 319 1,374 523 90 0 0 0 0 0 0 0 9.27 5-38 72 98 13.02 354 9.06 D.58 28.2 525 325 90 51 377 3 54 0 0 0 9.25 366 44 99 11.96 3.39 8.47 D.54 28.0 1,688 734 680 0 0 0 0 0 0 0 8.79 374 00 14.32 4.38 9,85 D.55 26.5 982 491 95 0 0 0 0 0 0 0 8.61 347 01 15,04 5.09 10.69 0-50 27.4 1,498 611 90 0 0 0 0 4 63 0 878 200 02 19,14 5.76 12-33 0,62 26.3 1,799 712 93 0 0 0 0 0 0 0 B.09 2.19 03 15 56 504 10.42 0,58 26.6 3,181 1,606 167 ❑ 0 0 0 0 0 0 7.22 219 04 16.99 5.54 10.65 0,55 25.3 1,703 141 217 0 0 0 0 0 0 0 7.84 209 05 16.97 5 35 10,21 0.54 249 2,310 1,826 23 0 0 0 0 0 0 0 7.36 1 94 06 10.70 3,19 6,39 043 24.9 1,452 486 59 0 0 0 0 0 0 0 8.37 1.50 07 16.02 5.33 10.70 0.57 25.8 2,6D1 1,918 1,222 0 0 4 20 0 0 0 7.57 2-15 08 14.96 4.66 9,25 0.51 24.6 2,147 1,542 260 0 0 0 0 0 0 0 753 248 09 15.07 4.92 9,33 0.52 24.9 4,282 991 57 0 0 0 0 0 0 0 7.07 262 10 12.60 3.84 6,96 042 23.0 3,238 1.436 4 0 0 3 11 0 0 0 7.50 218 11 7,94 2.23 4.21 0.34 22.7 1,913 309 51 0 0 0 0 0 0 0 9.16 125 12 13,86 4-24 8,28 0,48 24.1 1,450 1,338 26 0 0 0 0 0 0 0 8.04 212 13 12.15 3,58 6,64 041 22.9 3,061 1,311 27 0 0 0 0 0 0 0 843 191 14 12.17 3,71 6.74 0-43 23.3 3,152 2,580 122 0 0 0 0 0 0 0 866 308 15 16.54 5.30 9.36 D.50 23.6 1.552 431 8.75 262 15 13.20 3.96 7,21 043 23.1 10,015 2,332 9.75 3.41 17 12.48 3-61 7,72 0.49 26.2 1,987 226 8.79 231 18 5.080 1,340 8.49 297 19 2.280 303 8.19 179 20 4,910 3.812 8.56 2.56 Maximum 20,83 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 7.94 223 421 0.34 22.7 95 40 4 0 0 0 0 0 0 0 7.05 1 25 27 Average 1525 4.61 11.05 0.51 27.6 2,429 1.327 397 56 489 3 24 12 26 355 8.33 4.37 60 #Tests 34 34 34 34 34 40 40 34 34 34 34 34 34 34 34 38 38 15 Site: SW-03 Nitrate-Nitrogen Total Phosphorus 0.5 0.5 0.4 0 4 0.3 0.3 E E 02 0.2 4.1 — — 0.0 I 0.0 R^ 04 IV 18A 41 41 I' 41 Is, d' 1� a o 41 �,� 4' c` o' d' 01d, �-Nitrate Linear(Nitrate) Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 50 500 r 40 400 30 300 J J_ E 20 — v1 zoo 10 - ioo - — - 0 0 -10 d` R' 41 aA 144 m" a'' 4P %, Ip o` op d' 1� & 1 NA P .1 ^4 Chlorides Linear(Chlorides) 4 TOS Linear(TDS) Site: SW-04 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek, Lower ALPINE COUNTY SURFACEWATER DUALITY DATA 2020 Temp Alkalinity Turbidity SS TDS EC Chloride Total P POd-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg1L NTU mg1L mg1L umhos mg1L mg1L mg/L mg1L mg1L mg1L mg/L mg1L mg1L 03/03/20 4.3 8.41 79.3 3.1 3.20 114 149 2.76 0.042 0.013 0.208 < 0.020 < 0.010 0.072 04/01/20 7.4 7.94 78.6 2.2 2.87 116 156 2.75 0.042 < 0.010 0.176 < 0.020 < 0.010 0.011 05/12/20 9.9 7.43 55.6 3.7 6.18 95 108 1.30 0.094 0.031 1.40 < 0.020 < 0.010 < 0.010 06/18/20 16.5 7.40 91.1 3.2 3.44 124 162 1.840 0.139 0.035 0.93 < 0.020 < 0,010 < 0.010 07/01/20 17.2 7,53 107 19.0 26.7 158 223 3.68 0.256 0.037 1.30 < 0.020 < 0.010 < 0.010 08/05/20 18.7 7.67 84.8 12.0 5.35 136 173 3.38 0.160 0.035 0.31 0.045 < 0.010 0.041 09/03/20 21.0 8.17 77.1 5.6 4.72 118 155 2.62 0.113 0.049 0.59 < 0.020 < 0.010 < 0.010 10/13/20 8.5 7.70 72.5 4.6 3.41 114 147 2.63 0.107 0.025 0.32 < 0.020 < 0,010 0.031 11/04/20 7.4 8.01 44.7 2.5 3.98 80 91.6 1.44 0.038 0.010 < 0.10 < 0.020 < 0.010 < 0,010 Maximum 21.0 8.41 107.0 19.0 26.70 158 223 3.68 0.256 0.049 1.400 0.045 < 0.010 0.072 Minimum 4.3 7.40 44.7 2.2 2.87 80 91.6 1.30 0.038 0.010 0.100 < 0.020 < 0.010 < 0.010 Average 12.3 7.81 76.7 6.2 6.65 117 152 2.49 0.110 0.027 0.593 0.023 < 0.010 0.023 #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 2020 Oil & Coliforms Fecal <-Blue Green Algae--> Single Hard- Total N COD BO❑ Grease Ca Mg Na SAR Na Total E. coli Strep Colonies Filaments rilamamei Cells D.O. SO4 ness Date mg/L mg1L mg1L mg/L mg/L mg1L mg1L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 03/03/20 0.280 117 6.3 11.30 2.16 04/01/20 0.187 214 2.0 10.72 2.14 05/12/20 1.40 > 2,420 40.4 10.50 1.71 06/18/20 0.93 3,640 252.0 8.19 1.21 07/01/20 1.30 24,200 4,880 6.76 1.03 08/05/20 0.35 9,210 1,110 9.05 1.31 09103/20 0.59 2,420 24 10.90 1.23 10/13/20 0.35 3,410 86 9.11 2.07 11/04/20 < 0.10 261 11.0 10.7 1.82 Maximum 1.400 24,200 4,880 0 0 0 0 0 0 0 11.30 2.16 Minimum 0.100 117 2.0 0 0 0 0 0 0 0 6.76 1.03 Average 0.610 5,099 712 9.69 1.63 #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-04 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek,Lower ALPINE COUNTY SURFACEWATER QUALITY DATA From:1981 To: 2020 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH,N NO2-N NO3-N Total N COD BOD Grease Year C pH mg1L NTU mg1L mWL umhos mg/L mglL mglL mglL mWL mg1L mg/L mg/L mWL MAIL mg/L mg/L m91L 81 12.4 8.02 Be 2.68 5 174 260 5.2 0-08 D.05 3,69 0.46 0.04 0.56 13 1 1 82 IDA 7.51 59 4.46 11 133 194 0.09 0.D6 2,37 0-39 0.02 0.58 13 1 c 1 83 7.6 804 51 5.00 9 ill 173 174 0.10 0-D6 2,20 0.46 0.05 < 0.01 0.37 057 12 1 c 1 84 1 D 7 758 54 3.86 13 116 187 15.8 0.08 0.05 2.33 0.37 009 001 0.09 0.46 9 1 < 1 85 10 8 758 67 4.44 9 127 219 15.9 0-08 0.33 2.60 0.34 0.05 0.01 020 0.57 10 1 c 1 86 9.1 7.80 47 4.86 6 109 140 1D.8 0.07 0.02 1.73 0." 010 0.01 0-28 0-73 11 2 c 1 87 9.0 7.09 51 2.64 4 127 195 17.0 0.06 0.03 2.46 0.28 004 c 001 006 035 8 1 c 1 88 GA 743 51 4.53 10 93 122 3-8 0.07 0.02 172 0.29 0.04 r 001 0.01 0.32 a 1 c 1 89 10.0 742 60 15.81 44.8 103 134 4.4 0.14 0.02 2.17 0.51 0.07 s 0.01 0-04 0.56 15 1 3 G i 90 8.6 7.57 58 4.10 11.3 89 122 2.8 0-09 0.04 0.03 1.73 0.21 0.02 c 001 002 0.24 7 1.1 c 1 91 a.9 7.44 62 5.48 15.3 99 133 3.3 0.11 0.03 0-02 2.20 040 0.05 0-01 0-05 0.45 24 1 3 c 1 92 9.2 7.82 63 2.10 3.8 99 135 29 0.07 0.03 0.03 1.66 0.29 0.03 001 002 0-32 26 1 2 1 93 0.0 7.45 54 2.97 6.1 99 139 3.2 0.08 0.05 0.02 2.15 0.43 004 001 0.06 0.49 14 14 c 1 94 8.1 75.4 81 2.61 4.5 93 131 25 0.07 0.03 0.01 1.84 0.30 0.02 001 0 04 0.35 9 1 0 c 1 95 10.4 7.51 61 3.53 7.0 102 13D 2.8 0.09 0-05 0-02 194 057 0.02 0_01 0-05 DM 12 13 1 96 10.9 7-43 60 3.59 10.1 92 125 2.1 0.08 0.03 0.02 1.93 0.40 002 001 0.05 0.46 6 1.3 1 97 9.0 7.40 53 3.61 7.0 85 110 2.0 0.08 0.03 0.42 158 0.38 0.04 0.01 0.13 0.53 10 1.4 1 98 8A 7.05 50 7.17 18.5 05 107 2.1 0.10 0.03 0.02 173 0.43 0.02 a 0.01 0-03 0.47 6 1 3 c 1 99 9.8 7.22 52 4.49 13.1 83 108 11 0.08 0.03 0.01 1.78 0.31 r 0.02 r 0.01 0.02 0.34 6 1 2 00 9.0 7.32 52 5.76 9.4 87 108 18 0.07 0.02 0.02 1.50 0.32 c 002 C 0-01 0-02 0.35 <5 1 1 01 11.2 7.27 54 4.73 14-5 98 131 24 0.07 0.03 0.02 209 0.32 s 003 c 001 0-01 0.34 23 1 1 02 10.7 738 68 4.70 6.6 106 139 2.5 0.07 0.02 0-02 2.25 0-41 004 < 001 c O.01 043 c 5 1 2 03 10.5 776 57 5.68 10.2 90 116 21 O.D6 0.02 0.02 1.43 0.33 0.03 c 001 C 0.01 036 11 1.1 04 10.7 719 63 6.37 6A 99 126 2A 0.09 0.01 0.03 2.36 0.36 0.05 c 0.01 0.01 0-38 13 0 9 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 D 51 19 17 06 9.8 7.19 45 8.23 6.6 77 74 1.6 D.D6 0.02 0.02 1,43 0.21 0.03 4 0-01 0.04 0-25 9 1.2 07 11 A 7.58 53 12.27 13.9 81 111 21 0-10 0-02 0.01 2.11 0.43 0.02 0.01 0-02 0-45 9 27 08 10,0 7 71 53 6.30 5A 88 115 3.0 0.08 0.02 0.01 2.16 0.35 S 0.02 0.01 0.14 0.50 19 1 4 09 9.8 7.43 47 12-59 17.3 81 93 2.1 0.09 0.02 0.01 1.81 0.38 0.02 c 0-01 0.04 0-43 11 1 1 10 9.8 742 49 7.20 10.8 B9 10B 2.9 0-10 0-03 0.01 2.46 0.32 002 4001 0.03 0 3B 7 16 11 10.3 7.68 44 6.11 7.9 76 91 17 0.06 0.02 0.01 1,55 OA9 0-02 a 0-01 0.04 0.24 8 1 5 12 11.6 7.57 63 6,10 18 97 133 2,3 0.08 003 0.02 1,92 0.23 0.03 <0-01 0.01 025 14 13 11 7 7.34 55 15.26 12.2 88 111 20 0.10 0-02 0.01 2.08 0.33 0.03 r 0.01 0.01 0.28 1 7 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 c 0-01 0.24 067 16 15 13.9 787 69 3.34 3.9 105 143 2.9 0.05 002 0.02 1.97 0.17 002 c 001 0.01 017 16 10.8 712 52 4.40 6.4 97 116 2.2 0-09 0.03 2.15 0-35 0.02 001 0.12 047 17 13.2 7.32 52 9.90 13.2 92 107 2 1 0.11 0.02 1.99 0.38 0-03 c 0.01 0.14 0.52 15 13.4 763 57 10.24 16.0 95 116 1.9 0.13 0.04 0.35 0.02 c 0-01 0-D6 0-41 19 11.6 7.64 48.4 5.53 7.15 51 103 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 Maximum 139 804 77 15.81 44.8 174 260 19.9 0.14 005 0.33 369 0.59 0 10 001 0.37 0.73 26 27 1 Minimum 76 705 44 2.10 3.8 75 74 1.5 0 05 001 0.01 1,43 0.17 c 002 <0-01 c 0.01 0.17 c 5 09 < 1 Average 10.3 750 57 5.34 10.9 99 131 43 0.09 0.03 0.03 2.03 0-36 0-03 001 0.07 043 12 1 3 1 #Tesls 40 40 4D 40 40 40 40 39 40 31 35 37 40 40 38 38 40 31 34 18 Site; SW-04 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream; Indian Creek,Lower ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2020 Colftrms Fecal 1 Fecal <--------------------Blue Green Algae-- --a Single Hard- Ca Mg Na SAR Na Total E.evlf Strap----Colonies---- ---Filaments-- <---Fllamaments-- Cells D 0 504 ness Year m91L mg/L mWL % MPN MPN MPN # cells # cells # um #cells mg1L mg/L mg1L 81 2.977 1.408 595 24 102 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 9.00 552 53 84 1649 4.54 12.17 0.66 28.3 1,950 324 392 188 5 56 2 130 10 244 878 374 64 85 1641 4.43 14.70 0.74 28.7 2,573 460 108 0 0 0 0 54 5 0 821 628 58 86 1028 3.40 8.11 0.57 291 313 113 566 0 0 0 0 0 0 3,255 882 929 43 87 1434 4.58 14.98 0.80 28.7 3,249 231 161 0 0 a 0 323 3 1.685 853 14 11 60 88 12.41 3.87 6.78 043 23.2 2,358 177 170 0 0 46 277 162 6 0 914 555 54 89 1340 4.03 707 0.42 22.2 3,936 1.244 850 0 0 0 0 139 7 1,593 762 522 90 12 55 3.78 6.51 040 223 570 110 175 2 0 0 1 0 1 0 775 483 32 91 1381 4.02 8.16 048 23.0 2,095 1.462 1,245 0 0 0 3 0 0 0 825 645 41 92 1367 4.03 7.23 044 22.6 937 55 485 3 188 9 144 0 0 0 903 4.70 55 93 1423 4.10 7.38 0.44 22.5 1,453 367 95 0 0 0 0 0 0 0 856 497 40 94 1318 3.93 690 0.42 22.7 293 76 260 0 0 0 0 0 0 0 817 497 36 95 1354 3.64 6.71 041 220 2.183 1.260 110 0 0 0 0 0 0 0 887 535 38 96 1326 3.70 6.68 041 224 3.268 837 235 0 0 0 0 0 0 0 8 15 298 38 97 12.09 3.53 6.13 0.39 222 2,298 228 120 0 0 0 C 0 0 0 9.40 350 41 98 1062 3.10 5.83 040 235 3,105 2,549 320 ❑ 0 0 0 0 0 0 890 $30 37 99 10.44 3.15 6,30 044 24.7 920 188 90 0 0 0 0 0 0 0 848 337 00 10,45 3.25 5.69 0.39 23.0 1,119 194 55 0 0 0 0 0 0 0 836 270 01 1330 4.06 6.88 0.43 22.5 630 235 320 0 0 0 0 0 0 0 878 1.51 02 14.26 4.11 7.02 0.42 222 1,503 305 330 0 0 0 0 0 0 0 846 145 03 11 57 3.64 6.40 ❑42 23.3 489 52 512 0 0 0 0 0 0 0 682 147 04 1275 3.94 5.94 0.37 204 2,245 171 92 0 0 0 0 0 0 0 737 140 05 1115 3.43 5.74 0.38 21.9 1,534 407 152 0 0 0 0 0 0 0 777 1.70 05 9.52 2.78 4.96 0.37 22.9 2,010 305 58 0 0 0 0 0 0 0 7.53 1.16 07 11,35 3.48 6,00 0.40 22.4 913 97 1,222 0 0 0 0 0 0 0 5.38 1 69 08 11,22 3.37 B_26 0.42 23.4 1,080 893 5,965 0 0 4 48 0 0 0 770 210 09 983 3.06 5,63 0.40 23.7 3.324 571 217 0 0 7 62 0 0 0 830 201 10 1039 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 9 10 275 5.15 0 38 23.4 1.694 80 22 0 0 0 0 0 0 0 810 142 12 1250 3.79 7.12 044 236 1.518 917 80 0 0 6 77 0 0 0 871 178 13 11.76 3.50 6.19 040 224 3,119 76 27 0 0 0 0 0 0 0 558 1 73 14 1075 3.21 5.93 0.41 23.2 4,756 1,614 242 0 0 0 0 0 0 0 937 3.01 15 14.42 4.84 8.35 0.48 23.8 1,821 160 9.53 2.15 16 11,59 3.31 5,95 0,39 22.3 4,132 360 933 271 17 11.23 3.14 6.22 0.42 23.9 9.707 1,348 921 1 77 18 8,310 1,181 942 1 98 19 4.370 506 909 1 43 20 5,099 712 9.69 1.63 Maximum 1649 4.84 14.98 0.80 29.1 9,707 2,549 5,965 188 166 94 1,007 323 312 3,255 969 1411 64 Minimum 9,10 275 4.96 0.37 20.4 293 62 13 0 0 0 0 0 0 0 638 1 15 32 Average 1229 366 7.15 045 23.5 2.515 594 474 7 12 8 64 24 22 209 8 37 350 46 #Tests 34 34 34 34 34 40 40 34 34 34 34 34 34 34 34 38 38 15 Site: SW-04 Nitrate-Nitrogen Total Phosphorus 05 0.5 04 0.4 03 - - 03 J J Ot m I 02 — E 0.2 01 0.1 -- v \vAr IV 0.0 00 Nitrate Linear(Nitrate) Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 50 500 40 400 30 300 J J C 20 m E 200 100 0 -10 m A m a m a m o 0 4 0 0 - _ - _ r ----Chlorides Linear(Chlorides) --q--TDS Unear(TDS) Site: SW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream Carson River,Paynesville ALPINE COUNTY SURFACEWATER QUALITY DATA 2020 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO,-N NO,-N Total N Date C. pH mglL NTU mg/L mglL umhos mg/L mg/L mglL m21L mg/L mg/L mglL mg/L mg/L mg/L 01/03/20 1.9 7.14 39.5 0.75 0.62 64 90 2.46 0.014 < 0.010 < 0.10 < 0.D20 < 0.010 0.019 0.115 02/05/20 0.1 8.11 38.5 0.98 1.70 71 87.2 2.65 0.017 < 0.010 0.119 < 0.020 < 0.010 0.015 D.134 03/03/20 3.0 8.26 37.6 0.87 1.26 67 78.5 2.28 0.014 < 0.010 0.143 < 0.020 < 0.010 < 0.010 0.143 04/01/20 4.6 7.86 33A 2.8 5.40 60 77.0 3.84 0.031 0.011 0.184 < 0.020 < 0.010 < 0.010 0.184 05/12/20 6.1 7.68 21.2 2.8 6.78 39 41 0.85 0.021 0.010 1.30 < 0.020 < 0.010 < 0.010 1.3 06/18/20 11.6 7.91 29A 1.2 1.92 52 61.9 1.01 0.021 0.010 0.66 < 0.020 < 0.010 < 0.010 0.66 07/01/20 15.4 8.02 34.2 1.0 2.12 43 71 1.17 0.032 < 0.010 0.40 < 0.020 < 0.010 < 0.010 0.40 08/05/20 18.3 8.58 44.4 1.1 1.53 70 96.4 1.95 0.031 0.013 0.52 < 0.020 < 0.010 0.018 0.54 09/03/20 14.6 7.42 47.4 0.79 0.76 72 100 1.97 0.026 < 0.010 0.32 < 0.020 < 0.010 < 0.010 0.32 10/13/20 10.1 8.05 41.5 0.81 1.69 65 87.0 1.51 0.016 < 0.010 0.19 < 0.020 < 0.010 < 0.010 0.19 111D4120 7.6 8.21 46.1 0.79 0.78 90 96.1 1.94 0.015 < 0.010 < 0.10 < 0.020 < 0.010 < 0.010 < 0A0 12/01/20 2A 8.11 44.3 0.53 0.14 71 98.8 2.28 0.015 < 0.010 0.43 < 0.020 < 0.010 0.019 0.45 Maximum 18.3 8.58 47A 2.8 6.8 90 100 3.84 0.032 0.013 1.300 < 0.020 < 0.010 0.019 1.300 Minimum 0.1 7.14 21.2 0.53 0.14 39 41.0 0.850 0.014 < 0.010 0.100 < 0.020 < 0.010 < 0.010 0.100 Average 8.0 7.95 38.1 1.2 2.06 64 82.1 1.99 0.021 0.010 0.372 < 0.020 < 0.010 0.013 0.378 #Tests 12 12 12 12 12 12 12 12 12 12 0 0 12 12 12 12 12 Site: SW-06 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Paynesville ALPINE COUNTY SURFACEWATER QUALITY DATA 2020 Oil& Coliforms Fecal <--------Blue Green Algae------->Single Hard- COD SOD Grease Ca Mg Na SAR Na Total E. coli Strep Colonies Filaments Fiiamaments Cells D.O. SO4 ness Date mg1L mg1L mg!L mg1L mg1L mglL % MPN MPN MPN # cells # cells # um #cells mg/L mglL mg1L 01/03120 57.3 27.8 13.1 2.46 02/05/20 26.2 ¢ 1.0 12.4 2.52 03/03/20 90.5 < 1.0 11.50 2.39 04/01/20 187 9.8 11.43 2.18 05/12/20 167 7.4 12.65 0.931 06/18/20 1,730 248 9.31 1.28 07/01120 2,900 186 9.20 1.43 08/05/20 1,310 56.3 6.70 2.22 09/03/20 1,550 63.1 11.00 2.34 10/13120 921 172 9.78 2.06 11/04/20 488 29.2 10.2 2.71 12/01/20 140 10.9 11.9 3.08 Maximum 2,900 248.0 0 0 0 0 0 0 0 13.10 3.08 Minimum 26.2 a 1.0 0 0 0 0 0 0 0 6.70 0.931 Average 797 67.7 10.76 2.13 #Tests 0 0 0 0 0 0 0 0 12 12 0 0 0 0 0 0 0 0 12 12 0 Site. SW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Paynseville ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2020 Oil 8 Temp Alkalinity Turbidity SS TOS EC Chloride Total P PO4-P Boron K TKN Nil NO2-N NO2-N Total N COD 50❑ Grease Year C pH mWL NTU ma1L mall_ _umhos _mglL mgIL mg1L mglL mglL mall Mg/L MOIL MOIL mglL mglL mlIL _rnglL 81 9.9 7.93 36 1.15 4 54 78 1.8 003 0.01 1-52 023 003 032 6 1 < 1 82 64 7.61 28 2.57 23 49 57 004 0.02 1 11 ❑19 001 029 9 1 1 83 so 7.73 30 2.45 8 43 60 09 0.03 0.03 1.17 0.19 005 001 004 023 7 1 1 84 84 778 33 2.08 13 49 70 1.2 0.04 0.02 1.46 027 0-08 0.01 003 030 5 1 1 85 7.6 7.86 37 5.11 9 50 78 1.7 0-05 0.24 2-20 0-24 ❑04 001 004 028 7 1 < 1 86 65 7.91 32 1.92 6 53 67 1-4 0.03 0.01 1 35 0.19 ❑04 < 001 0.05 024 5 1 1 87 9.7 7.54 42 1.09 4 58 91 2.1 004 0.01 1 88 0.21 ❑03 < 0 01 0.06 028 5 1 1 88 92 7.69 42 1.10 4 80 100 33 002 0.02 1 81 021 003 < 001 0.09 032 5 1 < 1 89 8.7 7-75 36 1.65 7.3 60 88 22 003 0.02 1.92 020 0.03 < 0.01 0.06 027 6 1 1 < 1 90 9.4 7.77 40 1.61 4.8 73 96 2.0 004 002 0.02 1.73 0-18 ❑02 < 0 01 007 026 6 1 0 2 91 9.9 773 40 2.11 6.3 71 86 2.3 004 ❑01 0.02 1.70 020 003 001 Oil 0 31 10 1 0 < 1 92 93 8.01 40 1.37 4.6 69 90 20 003 0.01 0.02 1 65 0.20 ❑03 001 004 0 25 8 1 0 1 93 7.2 7.80 33 2.01 70 58 77 1.7 003 001 0.02 1.40 021 ❑03 0.01 0.06 028 8 1-2 < 1 94 8.8 7.93 39 1.10 2.4 86 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 71 7.69 31 1.70 10.7 54 68 1.4 0.03 ❑01 0.01 128 0.26 002 001 004 031 7 1 0 1 96 91 7.57 32 1.18 5.5 59 72 1 4 003 0.01 0.02 1 37 0.24 002 001 005 031 2 1 2 1 97 81 7.49 32 6.29 19-3 59 68 1-1 0-05 0.01 0.02 1 46 016 ❑03 001 010 0 27 5 1 0 1 98 8.8 7.27 33 1.31 5.0 58 72 1.4 0.02 0.01 0.01 1.43 0.18 002 < 0.01 0.05 0 24 < 5 ❑9 < 1 99 8.1 7.37 33 1.12 3.7 59 74 1.5 003 0.01 001 1 61 0-23 <002 < 001 004 028 < 5 1 0 00 73 7 33 35 1.34 6.3 61 77 14 0.03 ❑01 0.02 1.53 0.16 002 001 0.03 019 a 5 1 0 01 114 7.49 38 1.63 3.6 62 84 1 6 0.02 001 0.01 1 72 0.18 ❑02 < 0 01 002 021 15 1 0 02 86 746 37 1.62 28 64 80 1.8 002 <001 0.01 1 57 022 003 a 0.01 ❑02 025 < 5 0.9 03 9.0 7.68 36 4.27 10.5 81 74 18 0.03 0.01 0.01 1.50 021 0.03 0.01 0.03 0.25 6 0.9 04 8.7 7.35 35 3.97 10.4 62 76 1.8 003 0.01 0.02 1 56 0.19 ❑03 < 0 01 003 0 23 8 0.7 05 7.9 7.26 34 2.98 5.6 59 62 20 002 0.01 0.02 1 41 020 002 < 0 01 003 024 12 1 3 06 8 0 7.25 29 3.58 6.7 53 49 1.4 0.03 ❑01 0.02 124 0.13 002 < 0011 002 0.16 8 09 07 9.9 7.70 35 1.79 3A 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 51 72 1.8 0.02 <0.01 0-01 1.61 0-18 0-02 a 0-01 0.01 020 8 1 0 09 75 7.55 35 2.97 52 58 74 1.5 0.02 <0.01 0.01 1.49 0.17 002 < 001 001 0.20 11 08 10 5.9 7.51 33 3.55 5.6 59 73 1.5 002 0.01 < 0.01 1.52 ❑10 002 < 001 0.01 0.12 34 1 1 11 5.8 7.62 31 3.51 6.5 57 66 1.1 003 0.01 0.01 1.37 0.10 ❑02 < 001 002 0.13 8 1 4 12 82 7.46 37 1.95 3.1 61 78 1 3 002 001 0.01 1.58 013 0.23 < 0.01 0.01 0.15 1.4 13 8.7 7.41 35 1.69 29 60 72 1-2 002 001 0.01 1.40 0-14 003 a 001 002 015 1 0 14 7.8 7.54 39 1.29 20 65 83 1.5 0.02 001 0.01 1.62 0.13 003 < 001 001 014 1 0 15 as 7.35 38 1.72 2.6 88 85 14 0.02 ❑01 0.01 1.59 0.14 <002 < 001 ❑01 0 14 16 7.1 7.08 33 2A2 5.0 63 73 1.6 0.03 <0.01 1.42 0.16 <0.02 < 0.01 ❑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 a 0-01 0.02 0.16 18 8.6 7.77 36 1.54 2.5 83 79 1.8 0 03 0.01 012 002 < 001 002 0113 19 73 8 01 34.0 2.37 3.1 57 762 2.2 0.024 <0.011 0.131 <0 020 e 0010 ❑020 0.147 20 8❑ 7.95 381 120 2A 64 82.1 2.0 0.021 0010 0.372 0 020 0 010 0 013 0 378 Maximum 11.4 8.01 42 629 23.0 80 100 3.3 0.05 0.02 024 2.20 0.37 0-23 001 Oil 0.38 34 1 4 2 Minimum 58 7 08 28 1.09 2.0 43 49 0.9 0.02 <001 0.01 1.11 0.10 001 < ❑01 001 0 12 2 07 1 Average 81 7 60 35 2 23 6.2 60 76 1.7 0.03 0.01 0 02 1.53 019 0.03 001 004 023 8 1 0 1 #Tests 40 40 40 40 40 40 40 39 40 31 35 37 40 40 38 38 40 31 34 18 Site; 5W-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream; Carson River,Paynseville ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2020 Coliforms Fecal/ Fecal ----Blue Green Algae ------------ Single Hard- Ca Mg Na SAR Na Tolal E.00li Strep --Filaments-----> a---Filamaments-> Cells D O. SO4 ness Year mq/L mg/L. mglL % MPN MPN MPH # Cells 9 Cells A um #cells malL mc#L m /L 81 1.388 700 492 173 2,303 36 230 2 81 11 82 508 456 226 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 84 665 1.93 342 0.29 21.1 2.508 822 286 90 56 16 36 368 41 180 922 1.44 23 85 781 2.15 3.85 0.31 21.0 2,904 1.227 299 0 0 52 280 58 1 139 913 2.25 29 66 6.70 1 90 3.11 0.26 199 2,951 1,179 378 0 0 23 345 45 1 23 963 9.08 27 87 873 2.53 4.93 0.37 232 2,643 607 348 0 0 0 0 208 4 5,194 948 5.71 32 66 949 2.76 5.88 041 24.7 815 238 93 0 0 0 0 705 25 1,158 11.15 5.26 69 7.90 2.22 4.20 0.33 216 945 511 228 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 6 0 0 8.83 4.96 31 91 8.77 2.42 4.73 0.35 22.7 398 63 230 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 25 94 8.69 229 4.74 0.36 23.4 1,390 672 90 0 0 3 70 0 0 0 993 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 98 740 1 93 3.82 0.31 22.3 918 248 55 0 0 0 0 0 0 0 893 2.57 26 97 7.34 209 3.86 0.32 223 243 41 65 0 0 0 0 0 0 0 9.88 3.26 26 98 6.85 1.89 3.79 0.32 232 585 80 35 0 0 18 132 0 0 0 9.97 247 21 99 7.03 1 97 4.05 0.34 23.8 718 63 35 0 0 0 0 0 0 0 941 2.50 00 6.79 205 4.29 0.37 25.0 263 90 30 0 0 0 0 0 0 0 1002 2.70 01 8 07 224 4.96 0.39 250 210 58 40 0 0 0 0 0 0 0 929 2.60 02 7 80 214 4.86 0.39 254 250 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 04 751 221 4,53 0.37 243 316 51 7 0 0 0 0 0 0 0 8.95 2.73 05 745 207 426 0.35 23.8 72 29 51 4 266 35 216 0 0 0 1013 2.56 06 651 1.80 3,39 0.30 21 5 259 77 23 0 0 0 0 0 0 0 986 1.60 07 7 90 2.20 4.87 0.39 25.1 202 53 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 7.70 201 445 0.38 24.5 333 106 48 0 0 0 0 0 0 0 9.90 254 10 7.44 206 4 14 0.34 23.3 983 949 68 0 0 0 0 0 0 0 9.37 2.49 11 671 1.82 3,58 0,31 22.7 389 143 9 0 0 3 54 0 0 0 10.50 1 A4 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 13 793 2,00 4,29 0,35 23.5 740 62 7 0 0 0 0 0 0 0 9.71 230 14 841 220 4,95 0,39 25.0 1,545 106 6 0 0 0 0 0 0 0 9.62 263 15 8.85 227 4,93 0.38 241 1,087 104 10.46 275 16 781 203 4.32 0.35 23 6 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 10.45 199 19 760 22 10.54 2.02 20 797 58 1076 2.13 Maximum 9.49 2.76 5.88 041 25.4 20,967 20,255 680 173 2,303 62 738 705 821 5,194 11,46 9.05 33 Minimum 6.51 1.80 3,11 0,26 19.9 72 22 4 ❑ 0 0 0 0 0 0 8.65 1.44 21 Average 7.76 2.12 4,31 035 23 3 1,388 780 150 9 81 a 66 59 49 247 9.79 320 27 #Tests 34 34 34 34 34 40 40 34 34 34 34 34 34 34 34 38 38 14 Site: SW-05 Nitrate-Nitrogen Total Phosphorus 0.5 0.5 04 0.4 03 0.3 co CD £ 02 E 0.2 01 - 0.1 00 00 i Ip Is, 03 0p 0 1` _'P 1 P 41 lr I& e" 10 o" 61 4% o'' e 0 a'` �q Nitrate Linear(Nitrate) 9Tokel Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 10 250 9 5 200 - —I 7 6 150 J J of 5 81 E E 4 100 3 2 50 -- - - - 1 -- 0 0 51 B2B3 84 65 89 67 Ua89 90 91 92 93 94 95 95 97 98 9900 01 020304 05060708 09 1011 12 19 1416 1517 1B192D 11 35 ❑b� gN q�` 41 dp Al cp p" p'� �: p4 Ip 1`5 Chlorides Linear(Chlorides) .-6 TDS Linear(TDS) Site: SW-06 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River, Stateline ALPINE COUNTY SURFACEWATER QUALITY DATA 2020 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 01/03/20 2.0 7.77 40.4 0.65 0.22 58 95 2.80 0.017 < 0.010 < 0.10 ¢ 0.020 < 0.010 0.085 02/05/20 0.3 7.83 39.2 1.2 4.00 67 90.7 2.89 0.023 < 0.010 0.148 < 0.020 < 0.010 0.056 03/03/20 2.6 8.45 38.2 1.0 1.52 65 80.7 2.41 0.014 < 0.010 0.140 < 0.020 < 0.010 0.030 04/01/20 5.5 7.97 33.7 2.9 6.58 67 82 4.30 0.034 < 0.010 0.196 < 0.020 < 0.010 0.024 05/12/20 7.3 7.64 21.6 3.1 8.73 40 44 0.895 0.026 < 0.010 0.95 < 0.020 < 0.010 0.012 06/18/20 10.9 7.62 30.6 1.3 2.88 55 65 1.12 0.024 < 0.010 0.60 ¢ 0.020 < 0.010 0.011 07/01/20 16.2 8.03 34.4 1.1 2.58 49 74 1.22 0,031 < 0.010 0.27 ¢ 0.020 < 0.010 0.014 08/05/20 22.1 8.41 51.9 0.75 1.72 81 119 3.46 0.029 0.012 < 0.020 < 0.010 0.278 09/03/20 17.1 8.15 52.1 1.2 2.51 82 116 3.02 0.021 < 0.010 0.37 ¢ 0.020 < 0.010 0.094 10/13/20 11 A 8.37 43.1 0.64 1.24 66 90.6 1.72 0.013 < 0.010 0.23 < 0.020 < 0.010 0.018 11/04/20 9.2 8.14 48.3 0.53 0.67 95 101 2.39 0.011 < 0.010 r 0.10 ¢ 0.020 < 0.010 0.062 12/01/20 2.7 7.89 47.2 0.47 0.20 80 108 2.96 0.016 < 0.010 0.18 ¢ 0.020 < 0.010 0.091 Maximum 22.1 8.45 52.1 3.1 8.7 95 119 4.30 0.034 0.012 0.950 < 0.020 < 0.010 0.278 Minimum 0.3 7.62 21.6 0.47 0.20 40 44.0 0.895 0.011 < 0.010 a 0.100 ¢ 0.020 < 0.010 0.011 Average 8.9 8.02 40.1 1.2 2.74 67 88.8 2.43 0.022 0.010 0.310 ¢ 0.020 < 0.010 0.065 #Tests 12 12 12 12 12 12 12 12 12 12 0 0 10 12 12 12 Site: SW-06 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Stateline ALPINE COUNTY SURFACEWATER QUALITY DATA 2020 Oil & Coliforms Fecal <-Blue Green Algae-> Single Hard- Total N COD BO❑ Grease Ca Mg Na SAR Na Total E. coli Strep Colonie4,Filamer Filama Cells D.O. SO4 ness Date mg/L mq/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um#cells mglL mg/L mg/L 01/03/20 0.173 81.6 5.2 13 5 2.66 02/05/20 0.204 104.3 5.2 12.3 2.68 03/03/20 0.170 73.3 1.0 11.9 2.43 04/01/20 0.220 435 51.2 11.56 2.27 05/12/20 0.96 411 39.3 11.31 0.97 06/18/20 0.61 2050 161 9.66 1.36 07/01/20 0.28 1630 93.3 9.02 1.50 08/05/20 4330 62.6 9.11 3.63 09/03/20 0.46 12300 30.1 12.1 3.20 10/13/20 0.25 2420 77.6 9.94 2.27 11/04/20 < 0.10 517 18.9 10.2 3.06 12/01/20 0.27 166 25.9 11.9 3.66 Maximum 0.960 12,300 161 0 0 0 0 0 0 0 13.50 3.66 Minimum < 0.100 73.3 1.0 0 0 0 0 0 0 0 9.02 0.97 Average 0.336 2,043 48 11.04 2.47 #Tests 11 0 0 0 0 0 0 0 0 12 12 0 0 0 0 0 0 0 0 12 12 0 Site. SW-D6 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Stateline ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2020 ail 8 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO,-N NO3-N Total N COD BOD Grease Year C pH mg/L NTU rng1L mglL umhos mgJL mglL rnglL mg/L mWL m911- mg1L mglL mWL mg1L mg1L mgJL mg1L 81 107 775 38 1_DD 3 69 83 1 6 0.02 001 1.72 0.22 004 0 30 5 1 < 1 82 83 8.9 7,70 32 3.43 11 55 63 1.1 0.04 003 1.46 0.18 0.02 <001 002 021 7 1 < 1 84 10.1 7.72 38 2.42 10 56 82 22 0.04 0.02 1.59 0.27 007 <001 0.02 029 6 1 < 1 85 9.5 784 42 1.88 4 63 99 4 D 0.03 030 1.85 0.21 004 <001 002 024 7 1 < 1 88 7.2 790 35 1 98 7 58 76 2.3 0 03 001 1.47 0,20 0.04 <0.01 003 023 5 1 1 87 106 736 48 1.38 4 79 110 43 0 03 0.02 219 D 21 0 03 <D 01 0.02 0.24 5 1 < 1 88 107 759 48 346 9 90 125 6.1 0.04 002 210 D 28 0.04 <001 0.02 031 7 1 1 89 9.8 7.69 42 1.72 6.5 77 109 5.0 0.03 002 1.75 0.21 003 <001 006 027 5 1 2 < 1 9D 9.6 7.82 47 1.86 3.0 88 118 49 0 03 0.02 0.02 206 0.18 002 <D 01 0.04 023 5 1 1 < 1 91 9.4 7.62 45 1.82 5.2 78 107 44 0 05 0.01 002 1.95 021 0 03 001 003 025 9 1.1 1 92 10.1 7.81 45 1.83 3.8 79 113 42 0 03 0.01 002 1.88 0.23 0.03 001 0.02 025 8 1 2 1 93 7.8 7.72 35 2-13 8.3 63 82 22 0.03 0.01 0.02 1.54 0.22 002 0.01 004 028 14 13 < 1 94 9.9 785 42 0.91 23 72 98 24 003 0.01 0.02 1.80 0.22 002 001 002 025 6 1 1 < 1 95 80 7.62 32 1.86 11.7 61 75 20 004 0.01 0.01 1.34 0.29 002 0011 0.07 0 37 5 12 1 96 9.7 7.51 35 1.69 5.4 63 80 21 0.03 0.01 0.02 1.46 0.25 002 001 005 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 0.20 003 001 0.15 0.36 5 12 1 98 8.9 7.31 35 1.64 5.6 61 78 2.D 003 0.01 001 1.49 020 002 <001 0.05 026 < 5 10 < 1 99 10.5 733 33 1.09 6.7 60 78 1.5 0.03 <0.01 ❑02 1.59 021 0 02 <001 0.03 024 < 5 09 00 10.0 730 36 1.69 6.9 66 82 22 0.03 <0.01 002 1.61 019 002 <001 0.03 023 < 5 1 0 01 12.4 745 38 1.96 4.0 65 92 22 0.02 0.01 0.01 1 74 020 002 <001 0.02 0.24 13 09 02 11.0 7.66 36 1.84 3.9 64 81 22 0.03 <0.01 0.02 1.59 D.24 0.04 < 001 0.02 0.27 < 5 1 0 03 9.7 7.81 37 329 6.6 67 84 25 0.03 0.01 0.02 1.65 0.23 003 < 001 0.05 026 6 09 04 10.5 7.52 37 4.30 9.6 65 81 23 0.03 <0.01 0.02 1.55 0.21 003 <001 003 024 10 07 05 9.3 737 34 298 5.8 61 69 2.6 0.02 <0.01 002 1.47 0.24 002 < 001 0.06 ❑30 9 1 3 06 9.2 711 30 3.61 8.5 54 49 1.5 0.03 <0.01 0.02 1.27 DAD 0.03 < 001 0.03 014 17 1 0 07 11.7 773 33 2.03 3.9 63 83 2.1 0.02 <0.01 0.01 1.77 0.15 002 <D 01 005 021 7 1 0 08 11.5 7.94 38 1.56 24 63 86 28 0.03 <D.01 ❑01 1.86 021 002 < Doi 0.06 028 6 1 0 09 9.5 7.73 36 271 5.8 65 80 21 0.02 <001 ❑01 1.63 0.20 002 < 001 0.05 026 11 09 10 8.1 7.60 32 3.16 5.9 57 72 1.6 0.03 001 0.01 1.62 0.13 <002 < D D 1 002 016 12 1 2 11 8.3 773 31 3.97 9.1 56 68 1.3 0.04 0.01 0.01 1.60 D.14 002 < 001 0.03 0.19 7 1 3 12 11 0 729 40 1.66 3.1 62 81 1.5 0.02 0.01 0.01 1.67 0.18 0.03 < Doi 0.02 ❑21 1 3 13 11.2 751 36 2.15 4.0 62 74 1 4 0.03 0.01 001 1.45 0.19 002 < 001 002 0.20 09 14 9.7 757 39 1 18 2.2 67 89 20 002 0.01 ❑01 1.84 0 13 003 < 001 0.03 0.15 1 0 15 91 736 40 206 5.2 69 88 1 9 0.02 <0.01 0.02 1.55 015 0.02 < 0.D1 0.04 0.19 16 7.8 7.21 34 237 5.2 66 76 1.9 0.03 <0.01 1.47 0.17 <0.02 < 001 0.04 0.21 17 7.1 729 31 311 8.1 56 67 1.4 003 <0.01 1.19 0.15 002 < Dal 0.04 018 18 9.2 7.86 38 1.58 3.0 67 86 27 003 0.01 0.15 002 < 001 0.04 019 19 8.1 796 36 2.18 3.2 60 82 2.6 0.03 <0.01 0.14 <002 <001 0.05 019 20 8.9 8.02 40 1.24 2.7 67 89 2.4 0.02 0.01 0.31 <002 < 001 0.06 0.34 Maximum 12A 8.02 48 4.3D 11.7 90 125 6.1 0.05 0.02 ❑30 219 031 007 001 0.15 ❑37 17 1 3 1 Minimum 7.1 7.11 30 0.91 2.2 54 49 11 0.02 <0.01 001 1,19 010 <002 < 001 0.02 014 3 07 < 1 Average 9.6 7.80 37 219 57 66 85 25 003 0.01 0.02 1,66 020 ❑03 001 0.04 025 7 1 1 1 0 Tests 39 39 39 39 39 38 39 39 39 31 34 36 39 39 36 38 39 3D 33 17 Site: SW-06 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Stateline ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2020 Califorms Fecal I Fecal ----- --------------Blue Green Algae------------------a Single Hard- Ca Mg Na SAR Na Total E-coli Strep ----Colonies--- ---Filaments-----> Filamaments- Cells D 0 S0.4 ness Year M91L mg/L. mg/L % MPN MPN MPH # cells it cells # um *cells mglL mgiL mglL 81 1,843 1,191 468 50 403 42 312 2 63 6 82 83 4,215 1,050 643 0 0 20 310 0 0 0 967 069 26 84 8 O6 237 3.69 0,29 19.9 4,137 1.724 306 53 9 14 8 783 312 13 881 1 85 32 85 9.81 283 4.91 0.35 21.3 879 754 83 0 0 7 1 27 2 0 934 209 36 85 7,615 228 354 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 ❑.38 22.3 1,009 $39 251 0 0 46 577 115 4 1.339 937 664 35 88 11,73 3.73 6.26 0.40 22.2 666 288 176 0 0 0 0 369 13 554 1078 601 89 10.19 309 518 0.35 21 3 669 465 286 0 0 0 0 392 167 11.149 1059 5 34 90 10,95 336 5,41 0.36 21 2 1,074 178 318 0 0 0 0 0 0 222 843 5 71 46 91 1065 4.74 5.30 0.34 19.6 774 181 65 0 0 0 0 0 0 0 875 5.60 41 92 10.53 2.99 5.02 0.34 20.9 516 101 50 0 0 0 0 0 0 0 926 560 30 93 8.11 221 4.06 0.32 21.4 2,450 1,066 60 0 0 0 0 0 0 0 993 449 27 94 9.48 258 5.12 0.37 23.2 3,094 315 540 0 0 0 0 0 0 0 943 565 34 95 7.75 203 393 0.31 220 580 59 50 0 0 0 0 0 0 0 965 4.84 25 96 7.98 221 403 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 9.65 316 29 98 7.60 206 401 0.33 227 333 63 130 0 0 13 72 0 0 0 8.65 260 25 99 7.12 204 410 0.34 23.7 1,799 109 130 0 0 0 0 0 0 0 928 274 DD 7.35 233 4.34 0.35 23.6 1,503 119 60 0 0 0 0 0 0 0 933 3 05 D1 8.33 239 4.76 0.37 23.8 681 137 130 0 0 0 0 0 0 0 947 2 58 02 7.75 2.27 4.59 0.37 24.3 509 135 56 0 0 0 0 0 0 0 885 266 03 8.00 2.43 4.59 0.36 23.5 275 72 68 0 0 0 0 0 0 0 858 269 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 2.22 424 ❑.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 0 958 1 67 07 8.26 237 4.85 0,38 24.1 485 210 43 0 0 0 0 0 0 0 870 2.62 08 8.42 2.37 4.88 0,38 24.1 267 142 230 0 0 0 0 0 0 0 913 333 09 8.17 231 4.57 036 23.5 446 61 26 0 0 0 0 0 0 0 9.30 2.68 10 7.23 206 3.91 0.33 227 1,305 181 77 0 0 0 0 0 0 0 8.66 2.30 11 677 196 3.52 0.30 21.7 2,718 1,676 77 0 0 0 0 0 0 0 966 1 54 12 8.02 212 457 0.37 23.9 737 107 12 0 0 0 0 0 0 0 849 2.21 13 826 216 4.38 0.35 23.1 2,391 193 14 0 0 0 0 0 0 0 897 2.29 14 8.78 2.37 5.05 0.39 24A 1,633 205 13 0 0 0 0 0 0 0 923 2.84 15 9.15 246 5,18 0,39 24.1 1,867 61 1059 3 01 16 7.90 208 444 0.36 23.8 1,278 63 11.34 261 17 7.13 1 88 3.64 ❑.31 223 437 52 1057 1 62 18 1,449 104 1052 2.19 19 1,010 41 10.59 2.31 20 2,043 48 1104 2.47 Maximum 11.73 474 626 0.40 244 4,216 1.724 643 53 403 46 577 783 312 11,149 11.34 908 46 Minimum 6.54 184 346 0.28 19-5 167 41 12 0 0 0 0 0 0 0 843 069 25 Average 8.45 246 452 035 22.5 1,284 33D 16D 3 12 4 42 55 17 529 9.49 3.35 32 #Tests 34 34 34 34 34 39 39 33 33 33 33 33 33 33 33 38 38 14 Site: SW-06 Nitrate-Nitrogen Total Phosphorus 0.5 0.5 0.4 0.4 0.3 0.3 1 J � m 0.2 02 0.1 0.1 0.0 0 0 0^ D� 4y 9r1 69 �, W 9r9 9^ � O' 0� 05 Oh � n^ '�� 1�" ^1 �.9 0 6� d� o� �' 9 �• Ay 01 8,' On d' C(' D1 O� i �A n�' a� n� --g—Nitrate Linear(Nitrate) — Total Phosphorus Linear(Total Phasphwu5) Chlorides Total Dissolved Solids 10 250 9 8 200 7 6 150 J J E5 cm 4 f. 100 - 3 -- — 2 50 - 1 — 0 0 i---- - 81 82 83 84 65 86 87 88 89 90 91 92 93 94 95 98 B7 98 99 00 01 02 03 04 65 06 07 08 09 10 11 1213 14 15 1617 18 18 20 R1 p,' 45 D� 4°' o,'` d5 0�5 0'� qn O�` O� O`' 01 O' n° ♦� �`'� �.1 �o _s—Chlorides Linear(Chlorides) —0 TOS Linear(TUS) Site: SW-07 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredricksburg Ditch, Upper ALPINE COUNTY SURFACEWATER QUALITY DATA 2020 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 mg1L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 03/03/20 Dry 04/01/20 Dry 05/12/20 8.7 6.99 40.6 4.5 8.65 80 95 3.79 0.135 0.065 1.5 < 0.020 < 0,010 0.217 06/18/20 Dry 07/01/20 Dry 08/05/20 Dry 09103/20 14.2 7.03 93.4 4.9 4.12 210 328 31.2 0.959 0.83 5.0 3.510 0.334 1.35 10/13/20 Dry 11/04/20 Dry Maximum 14.2 7.03 93.4 4.9 8.7 210 328 31.2 0.959 0.830 1.50 3.510 0.334 1.350 Minimum 8.7 6.99 40.6 4.5 4.1 80 95 3.8 0.135 0.065 1.500 < 0.020 < 0.010 0.217 Average 11.5 7.01 67.0 4.7 6.4 145 212 17.5 0.547 0.448 1.500 1.765 0.172 0.784 #Tests 2 2 2 2 2 2 2 2 2 2 0 0 1 2 2 2 Site: SW-07 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredricksburg Ditch, Upper ALPINE COUNTY SURFACEWATER QUALITY DATA 2020 Oil & Coliforms Fecal <--------------------------Blue i Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strap <-----Cc<-----Fila<---Filam Cells ❑.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 03/03/20 04/01/20 05/12/20 1.7 a 2420 1200 9.4 2.36 06/18/20 07/01/20 08/05/20 09/03/20 6.7 39700 12300 9.7 11.7 10/13/20 11/04120 Maximum 6.70 39,700 12,300 0 0 0 0 0 0 0 9.69 #### Minimum 1.700 > 2,420 1,200 0 0 0 0 0 0 0 9.40 2.36 Average 4.20 21,060 6,750 9.55 7.03 #Tests 2 0 0 0 0 0 0 0 0 2 2 0 0 0 0 0 0 0 0 2 2 0 Site SW-07 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredrlrksburg Ditch,Upper ALPINE COUNTY SURFACEWATER QUALITY DATA From. 1981 To: 2020 oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Total N COD DOD Grease Year C pH mglL NTU mg1L mg1L umhos mglL mg1L mglL mg1L mg1L mg1L m91L mglL rrlglL mg1L mglL moll. mgrL 81 131 7.50 69 1.60 1 175 250 0.05 0.03 3.20 0.39 005 0.61 7 1 < 1 82 118 754 73 5.78 26 139 182 245 0 13 0.09 4.90 0.80 003 1.03 28 1 < 1 83 180 7.63 68 2.35 5 128 165 10.2 D.07 0.05 4.44 0.69 0.09 < 0.01 0.09 0.80 23 2 < l 84 15.0 763 59 4.30 11 95 155 9.7 0.11 D.D5 3.33 044 0.09 001 024 069 12 1 < 1 85 16.0 7.51 60 2.60 5 113 174 11.6 009 0.03 3.70 0.59 010 001 004 0.64 17 1 < 1 86 125 7.79 70 5.07 4 125 171 84 0.09 002 4.10 0 51 007 001 0 16 068 17 1 < 1 87 163 7.61 86 5.75 19 176 267 2D.8 020 c 0.01 6.75 1.32 0.20 < 0.01 022 1.55 36 5 < l 88 13.1 7-31 70 4-32 8 158 232 19.9 0-07 0.02 5.32 0.78 008 001 012 0.91 15 2 1 89 17.6 739 72 1208 26.0 166 257 27.9 D.21 003 5.22 0.94 008 < 0 D1 014 1 09 16 20 < 1 90 96 746 68 3.13 6.0 158 292 34.5 005 0.02 0.03 3.42 0.24 003 < 0 D1 0 31 0.56 6 1 2 < 1 91 143 722 69 2.96 12.6 198 262 422 0.17 0-06 0-04 4.48 0.64 ❑09 004 063 1.31 21 21- < 1 92 11 9 7.40 82 2.53 8.0 244 344 46.1 0.25 0.15 0.05 7.73 1,26 0.03 0 02 0.28 1.56 3 33 < l 93 14-0 712 72 4-20 74 166 243 26.3 0.21 0.13 0-03 5.32 084 003 002 044 1.30 18 1 8 2 94 108 787 80 230 19.0 240 313 33.4 0.12 0.03 0.02 3.63 0.95 003 001 044 1.39 10 4 D < 1 95 18.3 6 90 63 3.37 47 122 147 5.9 0.17 0.10 0.03 4.70 100 004 001 008 106 2 D 1 96 21 2 703 76 520 55 140 199 11.6 019 0.10 0.03 4.80 1.01 004 002 027 1.29 20 1 97 19.6 T44 64 7.00 54.0 129 155 7.2 0.24 0.08 004 3.70 1 16 0.05 0.01 007 1-24 34 46 1 98 17.0 7-04 60 3-40 6.4 114 144 5.9 0.13 007 0.03 3.55 0,73 003 001 013 0.87 17 < 1 99 20.0 715 87 2 5D 3.8 159 208 76 0.12 0.08 0 03 4.51 0.67 003 <0.01 0.41 1 10 1 1 00 15.7 711 64 24.23 40.5 143 193 143 0.46 0.21 0.07 5.83 1.65 032 0 05 063 233 34 01 166 7.21 72 7.48 5.2 146 223 18.1 0.24 0.22 0.04 5.3D 1.43 0.04 0.09 078 2.30 1.0 02 149 743 82 5.52 40 148 212 14-9 0.14 0.05 0.04 4.60 0-63 004 <0 01 034 ❑97 1 1 03 14.5 7.54 67 7.69 11.7 143 194 14.4 023 0.13 0.05 4.33 0.84 018 004 052 1 40 27 21 04 14.0 7.41 48 1275 26.0 133 183 136 0 08 0.06 0.03 5.03 077 019 001 0 38 1 15 25 20 05 147 587 65 7.28 5.7 149 184 174 0.$1 0.22 0.05 4.52 1 11 0.44 007 0 50 1 68 34 26 O6 163 7.18 68 4.45 5.5 115 131 5.9 0.15 0.05 0.04 3.04 0-75 013 001 0.14 0.90 1.5 07 153 7.53 77 4.92 8.6 149 212 16.1 0.14 0.07 004 4.80 055 0.25 003 093 1.51 24 17 08 79 7.51 50 43.00 71.3 114 140 7.3 040 0.14 002 8.66 1.32 008 001 010 143 89 09 141 768 89 20.73 325 167 229 15.6 0.16 002 003 5.82 0.83 003 e 001 023 107 26 10 11 8 7.38 75 8248 76.3 147 211 14.9 037 0.03 0.03 6.54 0.72 0.03 <0.01 0.63 136 is 11 124 7.52 62 49.62 85.3 114 148 68 044 0.06 003 5.81 1.23 0.07 0-02 017 142 21 27 12 205 7.11 70 9.50 13.7 153 257 16.5 027 0.14 0.04 5.56 325 210 002 107 434 50 13 145 7.12 74 7.50 8.9 148 197 12.4 022 0.04 0.03 4.75 1 05 D 05 002 0.47 1 52 29 14 88 713 81 5.13 5.5 170 247 192 0-13 0.04 0.04 6,13 060 005 <001 097 1 57 1 7 15 137 7.24 105 2.80 3.1 170 274 23.5 0.09 0.05 0.05 3.93 0.40 002 <002 1 28 1 68 16 Dry 17 14.5 719 65 2.50 2.5 120 153 54 0.13 0.05 5.26 0.65 D 03 <001 007 072 18 165 7.55 52 2.80 1.9 106 128 1.8 013 0.04 0.53 <001 003 ❑56 19 195 7.12 51 8.2 124 68 128 5.7 ❑23 ❑.1❑ 0.92 ❑33 003 018 1 13 20 11 5 7.01 57 4.7 6.4 145 212 17.5 0.55 0.45 3.25 1.77 017 0.78 420 Maximum 21.2 7.87 105 82.48 85.3 244 344 48.1 0.55 0.45 0.09 8.66 325 2.10 ❑17 1 28 434 36 8 9 2 Minimum 79 687 48 1-60 1.0 68 128 1 8 0.05 0.02 [0.01 3.04 024 002 <001 003 056 3 10 a 1 Average 14,8 7.34 70 10.12 16.8 146 205 162 0.19 ❑.1❑ 0 04 4.91 096 019 002 039 136 20 24 1 #Tests 39 39 39 39 39 39 39 38 39 30 35 36 39 38 37 37 39 20 34 18 Site: SW-07 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredrickshurg Ditch,Lipper ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2020 Coliforms Fecal 1 Fecal ____________.______..glue Green Algae --> Single Hard- Ca Mg Na SAR Na Total E.coli Strep ---Colonies--> <----Filaments------> -Filamaments--> Cells DO. SO4 ness Year m91L mg1L mglL % MPH MPN MPN # Cells # cells # um #cells mglL. mglL rnollL 81 1,120 763 216 56 193 13 90 3 46 10 32 5,380 1,606 3,305 126 930 104 1,122 4 84 92 83 6,700 5,965 2,515 5 10 65 780 35 920 20 775 216 61 84 15.33 3.20 8.93 0.52 24.2 1,500 958 1,355 2 1 5 2 142 7 72 863 12.43 53 85 14.47 3.48 10,73 0.62 269 9,110 1,343 643 0 0 0 0 277 2 0 7.70 331 50 86 1567 3.89 9.33 057 25.4 17,533 3,133 710 0 0 0 0 0 0 369 763 < 1000 60 87 2400 5.85 17.50 0.85 282 a 24,000 17.500 5,545 0 0 0 0 0 0 277 705 1343 86 88 22.50 5.03 12.50 0.60 23.6 7,966 3,672 998 0 0 0 0 0 0 277 10.81 1323 89 23A0 5.05 15.80 0.72 26.3 10,688 9,D65 8,496 0 0 0 0 0 0 1,708 B 93 1553 90 26.00 6.78 14.36 0,64 24.5 1,646 510 183 0 0 0 0 0 0 0 880 1788 78 91 27.60 6.82 19.64 0,85 28.3 12,366 7,696 430 0 0 21 648 0 0 0 747 1875 48 92 28.67 7.40 26.67 1 17 33.7 11,810 9,677 90 0 0 0 0 0 0 0 790 2501 122 93 2300 5.78 16.76 0.80 29.0 13,640 6,136 230 0 0 0 0 0 0 a 764 1346 64 94 23-00 5.67 13.10 0.64 265 4,053 830 25D 0 0 0 0 0 0 0 1090 1763 99 95 1667 400 7.80 0.44 20.9 12,167 9,677 0 0 0 0 0 0 0 572 597 96 1800 4.20 12.50 0.69 283 24,000 17.500 0 0 0 0 0 0 0 795 827 97 1600 4.15 10,25 0.59 265 17,500 5,515 4.800 0 0 0 0 0 0 0 808 731 53 98 1250 3.24 10.70 0.70 322 4,600 2,400 0 0 0 0 0 0 0 900 4 DD 99 19.95 4.23 14.30 0.79 30.7 7,800 3,060 0 0 0 0 0 0 0 535 5 96 00 1336 4.56 17.17 1 03 37.3 11,067 10.333 0 0 0 0 0 0 0 7.40 8 25 01 1630 4.23 19.75 1.13 39.1 5,620 5,62D 0 0 0 0 0 0 0 885 714 02 19.17 4.95 17.60 0.92 33.7 1,187 540 0 0 0 0 0 0 0 8.59 7.04 03 15.36 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 1049 3.45 9.01 0.62 29.5 7,800 5,620 240 0 0 0 0 0 0 0 756 713 05 1355 3.74 1552 0.94 34.7 2,538 2,040 230 0 0 0 0 0 0 0 790 542 O6 1505 3.50 9.01 0.54 26.1 965 680 0 0 0 D ❑ 0 0 857 212 07 1648 4.72 19.37 1.08 37.5 3,578 790 93 0 0 0 0 D 0 0 7.94 6 32 08 11 70 4.18 10.70 068 28.8 2,400 2,400 0 0 0 0 0 0 0 708 4 93 09 1947 5,90 17.73 090 323 7,643 3,820 D 0 0 0 0 0 0 988 7 30 10 16.90 6.13 14.69 0.78 29.4 4,325 3.958 0 0 7 83 0 0 0 768 687 11 1263 4.71 1 D.73 0.66 29.1 5,666 5,524 43 0 0 0 0 0 0 0 845 232 12 1687 4.87 19,77 1.10 38.4 11,000 7,643 0 0 9 297 0 0 0 743 2437 13 16.70 4,29 15.28 0.86 33.4 4,733 3,690 90 D 0 0 D 0 0 0 790 843 14 1907 5.18 20.87 1,09 36.9 7,477 4,443 0 0 0 D 0 0 0 723 946 15 2085 5.46 23.75 1.20 394 2,755 317 761 10 55 16 17 1497 3.56 9,34 0.55 24.9 8,041 304 9.D8 1 98 18 2,682 387 7.96 181 19 5,630 743 735 252 20 21,060 6,750 955 7 03 Maximum 28.67 7.40 25.67 1,20 39.4 >24,000 17,500 8,498 126 930 104 1,122 277 920 1,708 1090 25.01 122 Minimum 10.49 3.20 7,80 0.44 20.9 965 304 43 0 0 0 0 ❑ 0 0 535 1 81 48 Average 1805 4,81 14.69 0.79 30.2 8.067 4,497 1,463 6 33 7 104 14 31 83 8 11 696 70 #Tests 33 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 1 0 9 .3 1.2 0.8 1-1 07 10 09 0.6 ca 00 8 — a 0.5 -— £ 06 0.4 05 04 0.3 -- 0.3 0.2 02 0.1 - 01 00 0.0 s` a"' mh 19, %lb 41 0 d' 4 o^ oa d' a� d4 ^` ,+ ^`� ,� , a^ a' w' a� m9 41 a`' fi a� ga o` � 6 o§ d' ,` 0 :• ,n ^° +Nitrale Linear(Nitrate) +Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 100 500 90 80 400 70 60 300 J as 50 - rn E 40 200 - 30 20 100 10 - 0 0 4� as e` a'` a'S e1 �R o` 19 05 0, lib . 1 ,5 s1 ^a a^ R� a` a1 %A 9^ a' # a� dA o` 4P d' 4 d' Chlorides Linear(Chlorides) TDS Linear(TDS) Site: SW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Irrigation Ditch ALPINE COUNTY SURFACEWATER DUALITY DATA 2020 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 03/04/20 1.7 8.03 61.3 3.9 12.3 111 124 1.72 0.191 0.027 1.18 0.096 < 0.010 0.111 04/01/20 4.5 7.23 54.3 2.7 7.98 129 142 2.04 0.040 0.012 0.511 0.020 < 0,010 0.036 05/12/20 9.0 7.11 67.2 1.3 3.19 112 137 1.72 0.034 < 0.010 0.69 < 0.020 < 0.010 < 0.010 06/18/20 10.2 6.91 55.7 0.58 3.90 99 124 1.55 0.040 0.012 0.66 < 0.020 < 0.010 < 0.010 07/01/20 18,3 7.29 64.6 0.71 0.92 103 137 1.59 0.051 0.026 0.34 < 0.020 < 0.010 < 0.010 08/05/20 25.8 7.74 73.5 9.1 12.5 137 178 2.57 0.741 0.125 0.97 0.021 < 0.010 < 0.010 09/03/20 15.0 6.77 62.0 0.76 2.35 103 129 1.73 0.108 < 0.010 0-52 < 0.020 < 0.010 < 0.010 10/13/20 Dry 11/04/20 NA 7.50 53.1 0.30 0.10 115 118 1.92 0.013 < 0.010 < 0.10 < 0.020 < 0.010 0.017 Maximum 25.8 8.03 73.5 9.1 12.5 137 178 2.57 0.741 0.125 1.18 0.096 < 0.010 0.111 Minimum 1.7 6.77 53.1 0.30 0.10 99 118 1.55 0.013 < 0.010 < 0.100 < 0.020 < 0.010 < 0.010 Average 12.1 7.32 61.5 2.4 5.4 114 136 1.86 0.152 0.029 0.621 0.030 < 0.010 0.027 #Tests 7 8 8 8 8 8 8 8 8 8 0 0 8 8 8 8 Site: SW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Irrigation Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 2020 Oil & Coliforms Fecal<--------------------------Blue Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep colonies Filaments Filarnan Cells D.D. SO4 ness Date mg/L mg1L mg/L mg/L mg1L mg1L mg1L % MPN MPN MPN # cells # cells # um #cells mg/L mg1L mg/L 03/04/20 1.29 1,410 < 1 10,6 3.39 04/01/20 0.547 411 < 1 9.35 12.6 05/12/20 0.69 687 < 1 8.69 4.01 06/18/20 O.66 1,990 40.8 7.09 3,22 07/01/20 0.34 7,701 39.3 5.93 3.37 08/05/20 0.97 > 2,420 1,200 0.95 0,50 09/03/20 0.52 2,860 27.5 7.33 3.46 10/13/20 11/04/20 < 0.10 1,414 4.1 8.70 5.25 Maximum 1.29 7,701 1,200 0 0 0 0 0 0 0 10.60 12,60 Minimum 0.100 411 < 1.0 0 0 0 0 0 0 0 0.95 0.50 Average 0,640 2,362 164 7.33 4.48 #Tests 8 0 0 0 0 0 0 0 0 8 8 0 0 0 0 0 0 0 0 8 8 0 Site: SW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT SW-08 Stream: Irrigation Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA Irrigation From: 1981 To: 2020 Oil a Temp Alkalinity Turbidity SS TD3 EC Chloride Total P PO4-P Boron K TKN NH;N NO,N NO:,-N Total N COD BOD Grease Ca Year C pH mg1L NTU rnWL mg/L umhos mglL mg1L mg1L MOIL gVIL mglL m111- m91L mg)L mg1L mglL mglL mg1L mglL 81 13.2 772 61 2.24 17 116 134 004 002 2.51 037 003 0,50 13 1 < 1 82 15.3 753 57 240 8 98 119 0.04 0-04 2.16 047 0.02 D.70 17 1 < 1 83 138 772 56 3.52 12 96 117 1.4 0.11 004 233 038 0.06 0.01 010 0.49 13 1 < 1 84 142 7.66 57 4.59 18 88 114 1.1 012 005 2.51 0.39 007 <001 015 055 10 1 < 1 1055 85 14.2 7.63 57 3.53 21 85 116 1.9 0.12 0.15 263 0 38 006 <001 Oil 0.49 13 1 c 1 11 03 86 12.4 7.63 55 3.52 18 Be 111 1.3 0 13 0.02 250 0.38 005 <0.01 019 0.57 14 1 2 1049 87 13.4 7.28 57 248 13 93 119 1.8 010 0-02 228 0.32 D D3 <001 014 0,48 10 1 < 1 11 23 88 12.7 7.83 55 3.03 19 95 117 1.3 0.07 0.01 1.98 0.40 D D4 <001 016 0,58 8 1 < 1 11 55 89 13-7 7.49 53 2.79 129 94 118 1.5 0.08 0-02 2.17 045 006 <O 01 012 0.56 12 1 5 < 1 1073 90 14 1 756 54 401 23.5 102 111 1.2 cog 0,03 0,03 2.18 044 003 001 016 0.81 16 1 4 < 1 11 53 91 15.0 7 28 57 219 8.3 98 122 1.3 005 0-02 0,02 221 0.36 D D4 ❑01 016 0.54 18 1 1 1 11.70 92 14.5 7 53 54 244 127 96 122 1.3 0.07 0.02 002 2.19 046 D.D3 0.01 0.13 0.60 14 1.3 < 1 11.46 93 13.2 7.59 55 2-78 13.7 99 124 1.6 007 0.02 0.02 2.36 0.42 D D3 Doi 032 0.75 14 1.2 < 1 1212 94 13.3 7.40 49 2.87 11.3 96 127 1.6 0.08 002 0.02 2.40 050 003 001 035 0.86 6 13 < 1 1342 95 13.7 742 60 1.80 9.1 104 129 1.7 0.07 0.02 002 208 0.48 002 001 034 0.B4 7 15 1 1240 96 14.5 762 55 4.89 227 96 118 11.5 010 0.03 0.02 2.14 0,44 003 001 033 0.78 5 1.4 1 1098 97 13.6 7.66 52 4.25 20.4 97 109 1.8 010 0.04 0.02 263 0.40 0.03 001 040 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 0.42 002 < 001 026 0.69 6 1 1 < 1 1028 99 15.6 731 49 3.08 17.8 90 111 1.6 0.07 0 02 001 230 044 0 02 < 001 ❑27 0.72 9 10 979 00 13.9 713 49 3.37 33.5 91 109 1.6 009 0 02 0.02 2.15 046 0 03 < 0 Dl 020 0.66 17 1.1 906 01 15.8 745 55 5.24 15.4 98 122 1.9 0.16 0.03 0.02 242 0.40 0.03 < 0 Dl 016 0.56 14 0.7 10 38 D2 160 732 60 3.70 20.2 100 127 1.6 0.06 0.02 0.02 2.24 0.39 0.05 < 0.D1 D 12 0,52 10 0 9 1166 D3 13.1 7.46 57 6.40 19.0 97 114 1.6 0.06 0.02 0.02 2 30 047 0.03 < 0 02 013 062 15 0 8 12 29 D4 17.2 752 58 15.68 40.1 98 122 1.8 013 0.02 003 270 0.79 0.04 < 0 01 017 0.97 19 1 9 11 05 06 141 7.13 54 4.31 10.1 101 105 1.5 0.05 0.03 0.02 2.05 045 0.03 < 0.01 009 0 55 9 1 3 10 59 06 16.7 6.97 56 2.55 4.7 103 112 1.5 0.09 0.03 0.02 221 0.36 0.04 <0.01 003 0-40 12 1 6 11.36 D7 13.8 7.43 57 6.78 18.0 102 125 1.7 0.07 0.02 0.02 3.06 0.46 0.03 <0.01 006 0 53 22 1 2 11 57 08 16.2 7.56 55 11.24 28.3 100 113 1.8 0.10 ❑02 0.01 2.60 0.70 0.02 <0.01 002 072 22 17 1091 09 143 7.39 53 13.06 45.5 100 115 1.5 0.10 0.02 0.01 253 0.90 0.03 <0 01 0 05 096 28 1 5 1073 10 12-7 715 46 4.98 14.1 94 104 1.6 0.07 0.02 0.01 2.62 0.61 0.04 <0.01 0 04 066 35 1 6 929 11 154 745 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 2.0 972 12 16.2 6.93 80 7.77 16.1 101 125 1.5 0.07 0-01 0.02 2.43 0.56 003 <0 01 003 0.59 1 5 1141 13 146 7.11 84 5.43 18.7 114 133 1.7 009 0.02 0.02 3.06 0.59 0.03 <001 11111 059 1 2 1275 14 11 4 7.03 58 9.56 294 109 131 1.9 D 23 002 D.D2 3.75 090 0.04 002 0 01 ❑91 22 11 93 15 136 6.84 57 26.90 92.3 126 143 2.4 047 003 0.01 371 1 38 008 <001 0 02 1.39 1274 16 134 6.58 58 2.26 7.4 136 146 1.6 D.12 0-05 3.58 087 0.02 <001 0 02 0-88 1362 17 15.3 6.76 71 5.46 22.7 147 165 2A D.14 0,04 3.30 1.23 0.03 <001 0 02 1 24 1474 18 12.5 7.29 48 0.90 1.6 134 132 3.2 007 0.02 145 <0.02 <001 a 0 01 1 45 19 151 7.58 61 4.19 11.4 119 133 1-8 0,11 0.04 079 <0.02 <001 0 05 084 20 12.1 7.32 61 2.42 5.4 114 136 1.9 015 0.03 0.52 0.03 <0.01 003 0.64 Maximum 17.2 7.72 71 26.9 92.3 147 165 3.2 0-47 0-05 0.15 3.75 145 0.08 002 040 1,45 35 22 2 1474 Minimum 11 A 6.58 45 0.90 1.6 85 104 1.1 0 064 0.01 001 1.98 ❑32 0.02 <001 < 0 01 040 5 0.7 < 1 906 Average 142 7.35 56 5.2 194 103 122 1.7 0.1 D 0.02 0.02 2 53 057 003 o 01 013 071 14 1 3 1 11 36 #Tesis 40 40 40 40 40 40 40 38 40 31 35 37 40 40 38 38 40 31 34 18 34 Site SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream. Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2020 Colitorms Fecal! Fecal c--------------Blue Green Algae - -- Single Hard- Mg Na SAR Na Total E coli S1rep ---Colonies--- --Filaments--- <---Filamaments--> Cells D-O- SO4 ness Year mg1L mglL % MpN MPN MPN # cells # Cells # um #cells mg1L mg1L mq]L 81 2,064 752 392 18 75 61 424 4 160 15 82 6,670 1,963 381 36 95 67 438 8 205 45 83 1,785 672 132 10 20 37 385 30 1,852 20 8.02 250 46 84 2.66 8-28 0.59 30.6 3,100 893 409 74 2 5 21 517 718 7 7.70 152 40 85 264 851 0,60 30.6 2,463 471 207 0 0 0 0 185 5 0 7.53 1 01 40 86 3 05 6 59 046 254 1,830 407 546 0 0 0 0 115 3 646 7.64 925 38 87 271 8.28 0.66 299 891 669 213 0 0 23 508 69 3 4,778 7.90 612 40 88 281 877 0.60 30.7 3,368 496 300 0 0 0 0 25 0 201 8.94 501 89 2 58 802 056 300 5,282 2,973 4,245 0 0 0 0 fig 3 324 742 579 90 266 ass 0.60 31 1 3.842 1,739 4,354 0 0 D 0 0 0 0 6.90 653 41 91 282 768 0.52 27.6 3,651 203 130 0 0 0 0 C 0 0 7.16 670 41 92 2.58 8.45 0.58 30.2 6,618 844 220 0 0 0 0 0 0 0 7.62 707 44 93 2.83 8.80 0-59 29.5 2,838 114 80 0 0 0 0 0 0 0 810 695 37 94 3.13 9.35 0.59 29.7 2,548 309 580 0 0 6 8 0 0 0 749 701 39 95 2.77 972 0-65 31.9 2,694 651 1,315 0 0 0 0 0 0 0 803 613 43 96 2.59 899 0.63 323 3,420 2,091 994 0 0 D 0 0 0 0 7.55 286 7 97 273 850 0.58 30.3 3,222 1.518 330 0 0 0 0 0 0 0 803 386 38 98 2.46 862 0.62 323 2,953 1.336 390 0 0 D 0 0 0 0 808 387 40 99 2.48 899 0.66 33.5 4.543 2.312 160 0 0 0 0 C 0 0 7.49 441 00 2.57 8.12 0.61 32.4 5,555 2,661 160 0 0 0 0 0 0 D 8.69 455 01 2.81 9.42 0,68 33.8 5,100 3,388 580 0 0 0 0 C C 0 7.53 487 02 2.73 9.96 0.68 33.5 3.269 1,263 152 0 0 8 59 0 0 D 644 4.48 03 309 10.71 0.70 33.6 2,217 577 235 0 0 0 0 0 0 0 732 429 04 287 8.96 0.62 31.2 2,809 374 92 0 0 4 70 0 0 0 635 5.06 05 259 9.18 0,65 33.3 4,024 1,152 230 0 0 0 0 0 C 0 6.63 494 06 2.60 9.80 0.69 33.9 1,469 595 43 0 0 0 0 0 0 0 6.37 326 07 279 10.01 0.69 33.0 1,632 161 227 0 0 0 0 0 a 0 6.84 559 08 2.72 950 0.66 32.7 3,643 3,020 255 0 0 0 0 0 0 0 632 462 09 2.67 975 0.69 33.8 5.888 3,828 772 0 0 0 0 0 0 0 633 564 10 243 8.59 0.64 32.8 5,976 5,544 1.500 0 0 0 0 C 0 0 6.55 539 11 2.65 8.94 0.66 32.2 6,224 2,917 93 0 0 0 0 0 D 0 632 342 12 2.75 9.94 0.69 33.6 2,255 592 54 0 0 0 0 0 0 0 5.88 3.33 13 294 1078 0,72 33.8 3,154 1,910 20 0 0 0 0 0 0 0 533 3.96 14 287 10 50 0.73 34.0 4,463 3,090 277 0 0 0 0 0 0 0 628 5.03 15 3.14 12.00 0M 36.1 5,301 407 5.53 848 16 325 12-45 0.81 35.3 31,343 9,684 6.86 358 17 3.53 14.18 0.90 37.5 8,197 286 6.76 448 18 261 2 8.08 8.52 19 3,41❑ 49 5.67 517 20 2,362 164 7.33 448 Maximum 3.53 14.18 0.90 37.5 31,343 9,684 4,354 74 95 67 508 517 1,852 4,778 8.94 925 46 Minimum 2 43 6.59 0.46 25.4 251 2 20 0 0 0 0 0 0 0 5.33 101 7 Average 2 78 939 0.55 321 4,304 1,552 590 4 6 6 56 30 87 178 7 16 500 38 #Tests 34 34 34 34 40 40 34 34 34 34 34 34 34 34 38 38 14 Site: SW-08 Nitrate-Nitrogen Total Phosphorus 0.5 0-5 T— I 0 4 j 0.4 03 0.3 J J � Qf 02 02 01 0.1 00 OA qk 4� d o` oA Ip •^ �'' nh a� nq 41 aA 4q C', q' dh S qq o^ 0 d� 01 d+ t ;s :� ti� 0 +Nitrate Linear(Nitrate) +Total Phosphorus Linear(Total Phosphorus ) Chlorides Total Dissolved Solids 10 25C F 9 - 8 200 7 6 150 J J E E 4 100 3 2 50 0 0 81 820384 65060780 a9 90 91 92 93 9495 98 07 M 99 0001 0208 04 05 08070809 10 11 1213 14 15 15 17 18 19 20 q+ q� 01 Q` q� o,`+ e,5 Q ng p'S �j �� p°� �� 11'h 11 Chlorides Linear(Chlorides) f—TDS Linear(TDS) i IRRIGATION DITCHES Site: SW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: ICR Effluent ALPINE COUNTY SURFACEWATER QUALITY DATA 2020 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg1L NTU mg/L mg1L umhos mg1L mg/L mg1L mg/L mg/L mg1L mg/L mg/L mg1L 09/01/20 No Samples Collected Maximum Minimum Average *Tests 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Site: SWA 1 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream_ ICR Effluent ALPINE COUNTY SURFACEWATER QUALITY DATA 2020 Oil & Coliforms Fecal <-Blue Green Algae-> Single Hard- Total N CO❑ BOD Grease Ca Mg Na SAR Na Total E. coli Strep Colonies Filaments Filamame Cells D.D. SO4 tress Date mglL mglL mg1L mg/L mg/L mg/L mglL % MPN MPN MPN # cells # cells # um #cells mg1L mglL mglL 09/01/20 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 Stream; ICR Effluent ALPINE COUNTY SURFACEWATER QUALITY DATA From: 2000 To: 2020 Oil& Temp Alkalinity Turbidity $S TDS EC Chloride Total P POa-P Boron K TKN NH3-N NO:-N NOa-N Total N COD BOD Grease Year C pH mglL NTU mglL mglL umhos mg1L mglL mglL mglL mglL mglL mg1L mglL malt. mg1L mglL mWL MIL 00 5.2 722 103 0.060 01 7.0 746 51 8.31 94 78 109 1 4 0.060 < 0.010 0.01 2.15 0.680 < 0 100 <0 010 <0 010 0.700 02 8.1 574 820 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 ❑777 0 022 0 010 0 010 ❑797 04 No samples collected 05 52 7.78 45 705 5.6 69 96 21 0,037 <0.01❑ 0.586 0.028 <0 010 0 060 ❑656 06 No samples collected 07 10.3 7.86 46 11.7 71 106 1.5 0.073 c 0.010 0 550 0.033 <0.010 <0.010 0,670 23 08 7.5 8.31 54 6.2 83 113 20 0.068 0.012 1.100 0 082 <0 010 0 172 1 282 33 09 No samples collected 10 8.7 Boo 52 7.3 79 114 2.0 0.058 c 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 9.0 782 50 200 3.5 71 94 1 3 0.035 <0 010 2.26 0 787 0 020 <0 010 <0.010 0 787 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 D 470 <0.020 <0 010 0 022 0.492 20 No samples collected Maximum 103 831 54 8.31 14.6 83 114 2.1 0.073 0.012 0.01 2.26 1.510 0.100 0.010 0,172 1.530 33 Minimum 3.8 674 45 200 3.5 50 71 1.2 0.035 <0.010 0.01 2,15 D.470 <0 020 <0010 <0,010 0.492 22 Average 7.4 78.4 5D 6.12 7 9 73 100 1 6 0.053 0.010 0.01 2,21 0 8D4 0.042 0.01❑ 0 035 0.846 26 #Tests 10 10 5 5 a 7 10 9 10 9 1 2 9 9 9 9 9 3 0 0 Site: 5W-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: ICR Effluent ALPINE COUNTY SURFACEWATER QUALITY DATA From: 2000 To: 2020 Coliforms Fecal/ Fecal -----Blue Green Algae ----> Single Hard- Ca Mg Na SAR Na Total E.cofi Strap —Filaments--- <---Filamaments_ Cells D O SO4 ness Year mats- mglL mglL % MPN MPN MPN # cells # cells 9 um #cells mg1L m21L mak 00 01 12.00 2.02 6.62 0.47 26.0 17 c 17 428 02 03 1085 406 04 05 1080 208 06 07 3 C 3 10.11 273 08 8 a 2 1129 438 09 10 13 a 2 408 11 12 13 14 10.20 242 7.03 0.51 28.5 29 < 1 928 2.50 15 16 17 18 19 11.2 1 33 20 Maximum 12 00 242 703 0.51 28.5 29 17 0 0 0 0 0 0 0 11 29 438 Minimum 10 20 2.02 6.62 0.47 26.0 3 c 1 0 0 0 0 0 0 0 928 1.33 Average 11.10 2.22 6.83 0.49 27.3 14 5 1059 318 #Tests 2 2 2 2 2 5 5 0 ❑ 0 0 0 0 0 0 6 8 0 Site: SWA 'I Nitrate-Nitrogen Total Phosphorus 0-5 0.5 0.4 0.4 I ❑.3 0.3 E E 0.2 ❑.2 1 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 00 01 02 03 04 05 06 07 08 09 i0 11 12 13 14 15 16 17 1B 19 20 t Nitrate Linear(Nitrate) tTotak Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 10 200 j 9 B 150 7 6 i a 5 a 100 - - E E 4 3 50 2 1 -- 0 0 DO 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 Chlorides Linear(Chlorides) 9 TCS Linear(TOS) Site: SW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Bruns Diversion ALPINE COUNTY SURFACEWATER QUALITY DATA 25" above Fredericksburg Ditch 2020 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg1L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L m2 06/18/20 12.9 7.94 267 572 552 3.21 2.68 20 18.3 0.286 0.260 07/01/20 20.6 8.59 253 552 56A 3.21 2.84 20 18.4 0.830 0.233 08/05/20 21.9 8.47 282 593 65.2 3.60 3.74 20 17.8 0.900 1.19 09/03/20 18.4 8.29 302 637 69.6 3.64 3.59 21 22.1 1.42 1.94 10/13/20 11.5 8.69 295 673 72,2 4.32 4.18 20 24.3 0.806 2.27 Maximum 21.9 8.69 302 673 72.2 4.32 4.18 21.0 24.3 1 A2 227 Minimum 11.5 7.94 253 552 55.2 3.21 2.68 20-0 17.8 0.286 0.233 Average 17.1 8.40 280 605 63.7 3.60 3.41 20.2 20.2 0.848 1.18 #Tests 5 5 0 0 0 5 5 5 5 5 0 0 5 5 5 5 Site: SW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Bruns Diversion ALPINE COUNTY SURFACEWATER QUALITY DATA 25" above Fredericksburg Ditch 2020 Oil & Coliforms Fecal <--Blue Green Algae--> Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep Colonies Filament Filamai Cells ❑.0. SO4 ness Date mglL mglL mglL mg/L mg1L mg1L mg/L % MPN MPN MPN # cells # cells # um #cells mglL mg/L mg/L 06/18/20 21 8.54 14.7 07/01/20 21 7.87 14.1 08/05/20 22 7.14 15.9 09/03/20 24 9.11 19.3 10/13/20 23 8.69 18.3 Maximum 24.00 9.11 19.3 Minimum 21.00 7.14 14.1 Average 22.20 8.27 16.5 #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-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream Bruns Diversion ALPINE COUNTY SURFACEWATER QUALITY DATA 25"above From: 2001 Fredericksburg Ditch To: To: 2020 Temp Alkalinity Turbidity 55 TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO:-N NO-N Total N COD BOD Year C pHm9JL NTU mg1L m21L umhos mg1L mg/L mglL mglL m91L mglL mg1L mglL mglL mg1L mg1L mg1L 01 18.6 823 243 489 622 269 2.56 15 37 1397 0 59 1.44 17.39 03 17.6 801 296 436 572 248 226 1146 9.00 1 97 2.78 16.23 03 17.0 793 241 465 582 2.56 235 13.92 11.50 071 277 1740 04 17.7 815 243 490 613 3.13 295 14.48 1351 068 2.89 18.04 05 16.1 7.83 217 361 391 237 232 1014 917 055 1.78 1247 06 17.5 824 229 438 474 257 240 1426 13.12 053 1.69 1652 07 18.2 825 270 503 560 3.19 2.90 16.92 1424 063 1 22 1377 08 17.4 8 25 254 470 547 3.31 299 1268 1019 088 2.56 1613 09 20.2 838 259 503 536 3.40 3.20 13 13 1217 1 15 2.24 991 10 17.5 825 257 483 536 3.14 295 1200 995 1.15 2.93 16.07 11 18.2 835 205 388 437 1.99 1 90 8 30 6.11 1.46 3.34 13.11 12 20.8 845 256 468 526 2.98 273 11 91 927 182 4.21 1794 13 18.0 802 252 448 506 2.65 254 11 85 9 59 086 4.01 1672 14 17.3 8A6 286 524 446 3.31 228 1563 1192 055 3.74 1993 15 17.0 797 278 489 538 3.27 311 10.64 8.48 1.79 6.10 1853 15 14.8 7.50 33.3 200 382 335 228 1.67 929 7.43 068 2.02 11 99 17 17.4 797 173 324 355 154 1 38 10 65 5.42 098 2.90 1472 18 19.6 821 272 549 607 3.26 239 19.15 16.75 0 70 1.38 2123 19 17.9 827 257 558 58.7 3.04 273 18.33 16.87 072 2.14 21 18 20 17.1 840 280 605 63.7 3.60 341 202 2018 0 848 1.18 222 Maximum 20.6 845 33.3 296 605 63.7 360 341 2020 2018. 1 97 6.10 2220 Minimum 148 750 33.3 173 324 33.5 1.54 1 38 8.30 5.42 0 53 1.18 9 91 Average 17.8 814 33.3 248 469 52.1 2.84 2.55 13.53 11.44 0.96 2.87 16.82 #TesLs 20 20 0 0 1 20 20 20 20 20 0 0 20 20 20 20 20 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: 2020 Oil& Coliiorms Fecal I Fecal c---------------Blue Green Algae--------------------- Single Hard- Grease Ca Mg Na SAR Na Total E coli Strep ---Colonies--- ----FilamenLs-----> c--Filamaments---> Cells Do SO4 ness Year mglL mglL mglL mglL % MPN MPN MPN # cells # cells # um #cells mg1L mglL mglL 01 796 1872 03 6.44 1696 03 6.82 1870 04 827 16 85 05 696 1311 06 7 53 13 26 07 6.94 15 22 08 731 15 28 09 770 15 80 10 6 35 15 55 11 7.58 1247 12 632 1517 13 653 1550 14 717 1229 15 7.85 1810 16 923 959 17 778 892 18 751 1390 19 719 145 20 827 165 Maximum 0 0 0 0 0 0 ❑ 923 1872 Minimum 0 0 0 ❑ ❑ 0 0 632 8 92 Average 7.38 1482 #TesLs ❑ 0 0 0 0 ❑ 0 0 0 0 0 0 ❑ 0 0 0 20 20 ❑ Site: Sail-12 Nitrate-Nitrogen Total Phosphorus 10.0 10.0 90 9-0 80 8.0 7.0 7.0 60 6.0 J J 50 - — E 5.0 4.0 - -- - 4.0 f - - 3.0 - - -- 30 2.0 20 - - 1.0 0.0 00 01 03 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 01 03 03 04 05 06 07 O8 09 10 11 12 13 14 15 16 17 18 19 20 —�Nitrate Linear(Nitrate) +Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 100 500 90 80 400 70 60 - 300 - J J 50 01 E E 40 — 20D - - 30 20 1DD 10 0 D 01 03 03 04 05 08 07 08 09 10 11 12 13 14 15 16 17 18 19 20 01 09 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 �—Chlorides Linear(Chlorides) — i 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 2020 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N N0�-N NO3-N Date C pH mg1L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mglL mg/L mg/L 6/18/2020 13.4 7.56 56 70.9 2.86 0.037 0.024 0.69 0.020 <0.010 0.020 7/1/2020 16.9 7.45 127 231 22.7 0.928 0.795 4.2 3.75 0.459 0.508 8/5/2020 20A 8.34 156 351 27.8 1.50 1.50 8.4 7.38 0.391 0.52 9/3/2020 17.2 8.08 212 425 42.5 2.12 2.11 14 13.0 0.87 1.21 10/13/2020 9.8 9.75 72 101 2.74 0.087 0.080 0.47 0.371 0.013 0.075 Maximum 20.4 9.75 212 425 42.50 2.120 2.110 14.00 13.00 0.870 1.210 Minimum 9.8 7A5 56 70.9 2.74 0.037 0.024 0.470 0.020 < 0.013 0.020 Average 15.5 8.24 125 236 19.72 0.934 0.902 5.552 4.904 0.433 0.467 #Tests 5 5 0 0 0 5 5 5 5 5 0 0 5 5 4 5 Site: SW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredericksburg Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 100' below confluence with reclaimed water 2020 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 m /L 6/18/2020 0.71 8.82 1.63 7i1 r2020 5.2 7.51 5.57 8/5/2020 9.30 7.54 7.59 9/3/2020 16 9.66 12.4 10/13/2020 0.56 9.75 2.34 Maximum 16.0 9.75 12.40 Minimum 0.560 7.51 1.63 Average 6.354 8.68 5.91 #Tests 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5 5 0 Site: SWA3 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream Fredericksburg Ditch ALPINE COUNTY SURFACFWATER QUALITY DATA 100'below confluence From: 2001 with reclaimed wader To: 2020 Temp Alkalinity Turbidity SS TDS EC Chloride Total P P0,-P Boron K TKN NH37N NO N NO,-N Total N CO❑ BO❑ Year C pH mg/L NTU mg/L mglL umhos mg/L mg/L mglL mglL mglL mg/L mgJL mglL 191L mg/L mg/L _mUIL 01 163 7.72 106 179 16.3 D.63 051 379 440 0.16 040 435 02 132 772 101 153 14.4 0.73 0.53 1 99 1.97 0.20 074 293 03 12.7 7.80 97 155 13.8 0.60 0.53 321 273 016 0.48 385 04 126 7.65 108 178 17.1 0 89 0 T! 368 356 Dig 077 463 05 11.8 7.61 85 115 10.1 0.48 047 1 88 1 53 014 036 238 06 12.5 7.72 106 171 15.6 0.79 0.72 5.08 439 0.14 0.50 5.72 07 13.5 7.71 98 152 11.6 0.57 0.51 291 2.33 0.11 020 321 08 134 786 144 252 25.4 1.50 1 37 576 453 D 46 133 7.55 09 136 768 103 174 147 0.94 085 3 10 270 030 062 402 10 103 737 77 105 73 0.31 0.28 087 064 0.09 0.61 1.57 11 13.0 8.26 114 182 15.8 0.76 0.71 2 89 197 0.61 1 24 474 72 127 7 16 73 91 4.5 020 017 061 0.23 010 059 1 30 13 15 8 755 86 133 86 0.44 042 1.75 123 014 OAS 236 14 16.1 7.89 105 185 13.7 0.71 0.67 243 2.45 0.16 1.11 3.68 15 14.0 739 78 117 5.8 0.28 025 0 85 051 012 051 1 57 16 125 740 O.S 116 190 17.0 1.02 ❑83 3 30 261 031 1 06 466 17 12.3 752 66 90 5.6 0.21 0.17 078 046 014 04.4 1 36 18 15.9 7.87 116 199 17.7 0.94 1.22 1 71 487 0.22 0.38 1.87 19 11.6 8.12 58 84 3.41 0.18 0.15 0 84 074 0.05 0.13 1.02 20 15.5 624 125 236 19.7 0.93 0.90 5.55 490 0.43 047 635 Maximum 16.3 B 28 0.8 144 252 25.4 1.50 1 37 576 490 0.61 1.33 755 Minimum 10.3 716 0.8 58 84 3.4 0.18 015 061 023 ❑.05 0.13 1.02 Average 13.5 7.72 0.8 98 157 12.9 ❑.66 0.61 265 2.44 ❑21 ❑63 346 #Tests 20 20 0 0 1 20 20 20 20 20 0 0 20 20 20 20 20 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: 2020 Oil& Coliforms Fecal 1 Fecal a---------------------Blue Green Algae-------------------- Single Hard- Grease Ca Mg Na SAR Na Total E,coli Strep a —Colonies----> ---Filaments---- s---Filamaments--> Cells 1]O SO4 ness Year mglL mg1L mg1L mg1L % MPN MPH MPN # cells A cells # um #cells mgJL mglL mg/L 01 856 6.10 02 860 569 03 793 5.42 04 781 566 O5 836 403 06 8.07 540 07 810 444 08 620 804 09 662 509 10 745 331 11 888 537 12 833 2.68 13 5.94 4.03 14 787 526 15 893 364 16 927 5.72 17 901 2.04 18 847 450 19 919 1 93 20 8.68 5.91 Maximum 0 0 0 0 0 0 0 927 804 Minimum 0 0 0 0 0 0 0 694 1 93 Average 636 471 #Tests a 0 ❑ ❑ 0 ❑ 0 0 0 0 0 0 0 0 0 0 20 20 0 Site: SW-13 Nitrate-Nitrogen Total Phosphorus 5-0 5.0 40 4.0 - — 3.0 - 3.0 _j J CIO m E E 20 - 2.0 1 0 1.0 01 02 03 04 05 05 07 08 09 10 11 12 13 14 16 16 17 18 19 20 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 tNitrate Linear(Nitrate) --o—TolalPhosphorus Linear(TolaIPhosphorus) Chlorides Total Dissolved Solids 50 500 - 40 400 30 — 300 J J � fl1 20 — — 200 10 - - — 100 - 0 0 01 02 03 04 05 06 07 09 09 10 11 12 13 14 15 16 17 18 19 20 01 02 03 04 05 06 07 09 09 10 11 12 13 14 15 16 17 18 19 20 —�Chlorides Linear(Chlorides) t TES Linear(TES) I Site: SW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Celio Tailwater ALPINE COUNTY SURFACEWATER QUALITY DATA @ Brooke Diversion 2020 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 mg1L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 06/18/20 16.1 7.72 278 506 45.5 1.83 1.59 9.7 9.32 0.264 0.591 07/01/20 18.6 7.90 261 530 53.5 2.89 2.57 13 13.1 1.34 2.69 08/05/20 17.6 7.59 352 538 65.9 2.62 2.69 1.6 0.40 0.021 5.93 09/03/20 16.8 7.91 363 558 66.8 2.17 2.24 1.2 0.36 0.024 6.2 10/13/20 Dry Maximum 18.6 7.91 363 558 66.8 2.89 2.690 13.0 13.1 1.340 6.20 Minimum 16.1 7.59 261 506 45.5 1.830 1.590 1.20 0.36 0.021 0.591 Average 17.3 7.78 314 533 57.9 2.38 2.27 6.38 5.80 0.412 3.85 #Tests 4 4 0 0 0 4 4 4 4 4 0 0 4 4 4 4 Site: SW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Cello Tailwater ALPINE COUNTY SURFACEWATER QUALITY DATA @ Brooke Diversion 2020 Oil & Coliforms Fecal Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep <------Cc<-----File<---Filar Cells ❑.0. SO4 ness Date mg/L mg/L mg1L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mglL mglL 06/18/20 11 9.52 12.2 07/01/20 17 NV 13.5 08/05/20 7.6 7.44 12.8 09/03/20 7.4 9.50 14.4 10/13/20 Maximum 17.0 9.52 14.4 Minimum 7.40 7.44 12.20 Average 10.8 8.82 13.2 #Tests 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 4 0 Site. SW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream Cello Tailwater ALPINE COUNTY SURFACEWATER QUALITY DATA Brooke Diversion From: 2001 To: 2020 Oil& Temp Alkalinity Turbidity SS TOS EC Chloride Total P P047P Boron K TKN NH3-N NO2-N NO,N Total N COD BOD Grease Year C pH mg1L NTU mg1L mglL umhoS mglL mglL mglL mg1L mglL mg1L mglL rnVL mgll frg L mg11- mg)L mglL 01 15.7 773 245 398 44.0 140 1.35 443 2.96 029 1 39 6.11 02 14.1 7.69 220 325 36.9 127 1.13 2.98 194 018 1.67 5.03 03 13.5 7.45 255 395 44.6 1.35 1.24 272 214 024 296 592 04 13.2 749 228 373 452 1.80 1.76 515 477 027 341 883 05 12.1 742 173 239 27 3 1.23 1 20 361 298 015 1 77 553 06 13.8 747 207 311 33.7 1.54 1.49 4 98 402 0.29 3.12 8.39 07 13.7 7.65 268 413 487 208 1 95 647 477 025 231 902 08 137 760 221 348 399 1 83 1 70 344 2 59 032 342 615 09 125 7.50 173 250 21 1 0.95 064 1 39 005 004 1 00 2.43 10 10.5 7.71 116 160 15.2 0.54 0.49 048 002 007 1.10 1.64 11 14.4 7.88 189 204 33.0 1 09 089 1 94 067 028 233 455 12 134 723 189 314 27.3 1.27 109 5 80 415 0.17 1 04 701 13 178 748 313 494 628 189 166 301 359 036 309 534 14 17.2 7.56 291 520 54.0 276 2.20 6.01 547 071 409 1081 15 17.3 7.47 296 478 46.2 222 2.04 484 340 0.91 440 10.11 16 177 723 1.2 267 433 43.7 183 1.63 425 300 070 244 738 17 197 7.73 229 402 408 1.26 1 13 222 1 83 044 271 541 18 17.6 7,92 264 432 490 2.22 1.54 9.94 10.59 0.46 2.29 12.69 19 13.9 7,73 278 498 52.6 2.36 2.17 701 609 031 498 1230 20 17.3 778 314 533 57.9 238 227 6 38 5 80 041 385 10.75 Maximum 19.7 792 1 2 314 533 579 276 227 9 94 10 59 091 498 1269 Minimum 10.5 7.23 1-2 116 160 152 054 049 0.48 002 0.04 1-00 1.64 Average 16.0 7.59 1-2 237 376 40.6 1 66 1.48 435 354 034 268 727 9 Tests 20 20 0 0 1 20 20 20 20 20 0 0 20 20 20 20 20 a 0 0 Site SW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Cello Tailwater ALPINE COUNTY SURFACEWATER QUALITY DATA Brooke Diversion From: 2001 To: 2020 Coliforms Fecal 1 Fecal ---Blue Green Algae---------------- Single Hard- Ca Mg Na SAR Na Total E.C00 Strep ---Colonies-----> <----Filaments--- —Filamaments--- Cells D 0 SO4 ness Year mg1L mglL mglL % MPN MPN MPN # cells # cells # um #Cells mg1L mglL mglL 01 7.99 1447 02 8 34 1085 03 5 36 1446 04 654 11 95 05 7.03 655 06 624 1043 07 6.32 1261 08 676 11 13 09 7.80 866 10 7.14 631 11 7,17 8 81 12 8.30 758 13 8.04 17.43 14 604 1686 15 593 1534 16 8.30 1403 17 6.82 996 18 672 1239 19 7.34 132 20 8.82 132 Maximum 0 0 0 0 0 0 ❑ 8.82 1743 Minimum 0 0 0 0 0 0 ❑ 5.36 631 Average 715 11 77 #Tests 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 20 20 0 Site: SW-15 Nitrate-Nitrogen Total Phosphorus 10.0 MID � 9.0 9.0 ` 8.0 8-0 70 7.0 I 6.0 6.0 J J 5.0 — ——— I 5.0 40 — 4.0 — 3.0 — — 3.0 20 — 2.0 — 1.0 1.0 — —00 C.0 01 02 03 04 D5 06 07 06 09 10 11 12 13 14 15 16 17 143 19 20 01 02 03 04 05 06 07 06 09 10 11 12 13 14 15 16 17 18 19 20 Nitrate Linear(Nitrate) 6 Total Phosphorus Linear(fatal Phosphorus) Chlorides Total Dissolved Solids 100 500 90 80 400 70 60 300 IP — os 50 E E 40 200 30 — 20 14 100 — 10 0 0 01 02 03 04 05 08 07 08 09 10 11 12 13 14 15 16 17 16 19 20 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 1B 19 20 Chlorides Linear(Chlorides) TDS Liinear(TDS) Site: SW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Drain Ditch ALPINE COUNTY SURFACEWATER DUALITY DATA @ Fairview Lane 2020 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Baran K TKN NH3-N NO2-N NO,-N Date C pH m IL NTU m IL m IL umhos m IL m IL m /L m IL m IL m IL m IL m IL m IL 06/18/20 13.5 6.43 148 221 1&6 0.085 0.037 0.78 0.219 0.030 0.790 07/01/20 22.0 7.71 146 239 14.7 0.073 0.03 0.81 < 0.020 < 0.010 0.344 08/05/20 23.7 8.53 153 227 15.5 0.088 0.028 0.28 < 0.020 ¢ 0.010 0.025 09/03/20 17.7 7.51 160 199 15A 0.069 0.015 0.26 < 0.020 < 0.010 ¢ 0.010 10/13/20 13.6 9.33 160 248 16.6 0.024 0.015 0.29 0.033 < 0.010 0.018 Maximum 23.7 9.33 160 248 16.6 0.088 0.037 0.810 0.219 0.030 0.790 Minimum 13.5 6.43 146 199 14.70 0.024 0.015 0.260 < 0.020 < 0.010 < 0.010 Average 18.1 7.90 153 227 15.6 0.068 0.025 0A84 0.062 0.014 0.237 #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 2020 Oil & Coliforms Fecal <-Blue Green Algae-> Single Hard- Total N COD BOA Grease Ca Mg Na SAR Na Total E. colr Strep Colonies Filaments Filamame Cells ❑.0. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mglL mg/L % MPN MPN MPN # cells # cells # um #cells mglL mglL mglL 06/18/20 1.6 9.37 6.07 07/01/20 1.2 9.50 6.05 08/05/20 0.30 10A 5.97 09/03/20 0.26 10.1 539 10/13/20 0.31 9.33 6.12 Maximum 1.60 #### 6.12 Minimum 0.260 9.33 5.39 Average 0.73 9.74 5.92 #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 Stream Drain Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA @ Fairview Lane From: 2001 To: 2020 Temp Alkalinity Turbidity 55 TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO-N Total N COD BOD Year C pH mg)L NTU mg/L mg/L umhos mgtL mg/L mq/L mg/L mgL mg/L mglL mg/L mg/L mg1L mg/L mglL 01 02 145 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 0 015 0 101 0 736 04 151 750 154 226 189 0 190 0 019 0 879 0.074 D D17 0 103 100 05 148 730 158 206 21.7 0 089 0 027 1 127 0 044 0 016 0 169 131 O6 153 737 154 206 18.9 0 124 0.058 0 984 D.353 D D21 ❑342 135 07 157 7 59 160 227 17.8 0 070 0.018 0 475 D 026 < 0010 ❑084 0 569 08 156 770 165 244 20.3 0 075 0.029 0 735 D 064 0 033 0 160 ❑928 09 171 764 193 301 23.5 0 597 0.333 2 358 1.439 0 134 1 18 367 10 148 743 192 282 25.7 0.146 0.032 0 790 0 035 a 0 010 0 147 0 947 11 156 7.70 161 228 20.7 0.216 D.102 1.196 0.112 0 064 0 404 166 12 196 7.38 152 231 155 0 111 0.028 0 771 0 243 a 0 010 0 145 0 925 13 18 0 731 181 253 19.9 0 096 0.030 0 742 0 074 0 031 0 152 0 911 14 19.0 760 196 266 20.7 0 060 0 024 0 543 0 037 D 012 0 132 0-671 15 173 7.31 184 277 21.5 0 D88 0.019 0 375 ❑022 <0010 ❑011 0 377 16 177 724 3.3 183 273 22.5 0 093 0.025 0 664 ❑024 0.011 ❑049 0 733 17 18 5 725 177 251 179 0.159 O.D45 1 100 ❑044 ❑011 ❑125 123 18 194 782 171 255 19.6 0.117 0 046 0 593 0.021 0 013 0 052 0 646 19 17.6 7.69 140 201 155 0 176 0 049 0 989 0 225 0 019 0269 127 20 18.1 7.90 153 227 15.6 0.068 0.025 0 464 0.062 ❑014 024 073 Maximum 196 7.90 3.3 195 301 25.7 0.597 0.333 2 358 1.439 0 134 1 18 367 Minimum 14.6 724 3.3 140 201 15 5 0.050 0.018 0 375 0 021 s 0 010 0 011 0 377 Average 16.8 7.52 3.3 159 245 19.8 0 138 0.050 0 835 0.159 ❑024 0207 1-06 It Tests 19 19 0 0 1 19 19 19 19 19 0 0 19 19 19 19 19 0 0 Site: SW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Drain Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA Fairview Lane From: 2001 To: 2020 Oil& Coliforms Fecal/ Fecal < -----Blue Green Algae-- --- ---------------> Single Hard- Grease Ca Mg Na SAR Na Total E-coh Strep --Filaments---- <---Filamaments---n Cells D 0 SO4 ness Year mg1L mgfL mgfL mgfL % MPN MPN MPN # cells it cells # um #cells mglL mgrL mg1L 01 02 697 804 03 7.03 675 D4 773 6 35 05 879 6.95 06 8 90 6 05 07 827 636 08 761 7 85 09 7.80 7.66 10 6.34 705 11 826 5 21 12 8.88 6 56 13 860 777 14 846 741 15 712 566 16 9.10 714 17 775 3 80 18 977 852 19 820 499 20 974 592 Maximum 0 0 0 0 ❑ ❑ 0 9-77 804 Minimum 0 0 0 0 ❑ 0 0 634 380 Average 8.17 553 #Tests 0 a 0 0 0 ❑ ❑ 0 0 0 0 0 0 0 0 ❑ 19 19 ❑ Site: SW-16 Nitrate-Nitrogen Total Phosphorus 09 40 0.8 0.7 I 30 -- 0.6 - - - J J io `5 0.5 20 E 04 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 01 02 03 04 05 06 07 03 09 10 11 12 13 14 15 16 17 18 19 20 Nitrate Linear(Nitrate) +Total Phosphorus Linear[Total Phosphorus Chlorides Total dissolved Solids 50 250 40 200 - - 30 150 - - -r J_ J_ E 20 -- - - 100 10 50 - 0 0 01 D2 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 10 19 20 01 02 03 04 05 06 D7 06 09 10 11 12 13 14 15 16 17 1S 19 20 Chlorides Linear(Chlorides) +TDS Linear(MS) TRIHALOMETHANES (THM) MTBE (Methyl tert-Butyl Ether) MONITORING ENVIRONMENTAL Analyticdl July 6,2020 South Tahoe Public Utility District Lab ID : SP 2007912 1275 Meadow Crest Drive Customer 2-1 1369 South Lake Tahoe, CA 96150 Laboratory Report Introduction: This report package contains total of 14 pages divided into 3 sections: Case Narrative (2 pages) : An overview of the work performed at FGL. Sample Results (6 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 ReDcei a FGL Lab ID# Matrix Harvey Place Reservoir 06/15/2020 06/16/2020 SP 2007912-001 W W Diamond Ditch:at HPR outlet 06/15/2020 06/16/2020 SP 2007912-002 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 5 '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 sec 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 06/16/2020:207191 All preparation quality controls are within established criteria(performed at FGL-SP ELAP# 1573),except: 5030B The following note applies to 1,1-Dichloroethylene,Toluene-0: 320 LC5 not within Acceptance Range(AR), Data was accepted based on the BSIBSD recovery, The following note applies to Benzene; 435 Sam le matrix may be a ffe cting this anal te. Data was acce ted based on the L C S or CCV ery. 06/16/2020:209865 All analysis quality controls are within established criteria,except: 8264E The following note applies to 1,2,3-Trichlorobenzene, 1,2,4-Trichlorobenzene,Acrolein,Acrylonitrile, Naphthalene: 360 CCV above Acceptance Range(AR). Samples which were non delcct for this anal to were accepted. Page 1 of 14 Corporate Offica5&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Ogee&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E Linda Avenue 3442 Empresa Drive,Suite❑ 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:(B05)525-4172 1 Ag FAX:(805)392-2083 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(B05)783-2912 FAX(559)734-8435 CA ELAP Certification No 1573 CA ELAP Certification No 1583 CA ELAP Certification No 2670 CA ELAP Certification No 2775 CA ELAP Certification No 2810 July 6, 2020 Lab ID : SP 2007912 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:DMH f]iyilnl k•v:ynrl In ICin,A 111—h—H 5 Approved By Kelly A.Dunnahoo,B.S. TiLLe Labomwn Ducclor odic:ioxn-na-iw Page 2 of 14 ENVIRONMENTAL July 6, 2020 Lab ID : SP 2007912-001 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : June 15, 2020-10:52 South Lake Tahoe, CA 96150 Sampled By : B. Chernago Received On : June 16, 2020-1 1:58 Matrix : Waste Water Description : Harvey Place Reservoir Project : AG72382 Sample Result-Organic Constituent E�L PQL Units Note Sample Preparation Sample Analysis Method DatellD Method Date/ID EPA B260 4-Bromofluorobenzene$ 95.6 78-123 % 5030E W16:.20:207191 8260E 06116/20:209865 Dibromofluoromethane$ 89.6 65-125 % 5030E ON161'20:207191 8260B 06116/20:209865 1,2-Dichloroethane-d4$ 89.9 58-144 % 5030B 06/16120:207191 82603 06i16'20:209865 Toluene-d8' 85.6 92407 % 5030B 06/16120:207191 82603 06116/'2D:209865 Acetone ND 50 ug/L 50303 06/16120:207191 9260B 0611CvM209865 Acrolein ND 50 ug/L 5030B 06/16/20:207191 82608 06116120:209865 Acrylonitrile ND 50 ug/l. 50303 06 W20:207191 8260R 06116/20:209865 Benzene ND 0.5 ug/L 5030B W16+2:207191 8260B 06116i20209865 Bromobenzene ND 0.5 ug/L 50308 W16120:207191 8260B 06116R0209865 Bromochloromethane ND 0.5 ug/L 5030E 06/16120:207191 926DB 06116/20:209865 Bromodichloromethane ND 0.5 ug/L 5030E 06/16120:207191 82603 06116/20:209865 Bromoforin ND 2 ug/L 50303 O6'16120:207191 9260R 06116120:209865 Bromomethane ND 0.5 ug/L 5030E W16120:207191 9260B 06116/20:209865 tert-Butanol ND 5 ug/L 5030B W16/20:207191 8260B 0 611 600 2098 6 5 2-Butanone(MEK) ND 10 ug/L 5030B 06'16I20:207191 92608 06116iM:20"65 n-Butylbenzcne ND 0.5 ug/L 5030B 06/16120207191 8260E 06r16/20:209865 sec-Butylbenzene ND 0.5 ug/L 5030B Oev'l6170:207t91 8260E 01i116120209865 tcrt-Butylbenzcne ND 0.5 ug/L 503013 06,'16120:207191 9260B 06116,20:209965 Carbon Disulfide ND t0 ug/L 5030B 06/16120207191 9260B 06116,N:209865 Carbon Tetrachloride ND 1 ug/L 50303 06,'16120:207191 8260B M16120:209865 Chlorobenzene ND 0.5 ug/L 5030B 06/16i20:207191 8260E 06i 16130:209865 Chloroethane ND 1 ug/L 503DB D6116120:207191 8260B 06-16120:209865 Chloroform ND 1 ug/L 50303 06/16120:207191 9260B 06-16120:209965 Chloromethane ND 0.5 ug/L 503D3 06/16120:207191 6260E 06'16120:209865 2-Chlorotoluene ND 0.5 ug/L 503013 06116120:207191 8260B 06'16120:209865 4-Chlorotolucnc ND 0.5 ug/L 503013 06/16120:207191 8260B 0&160-0:209965 Dibromochloroinethane ND 2 ug/L 5030B 06116120:207191 9260B 06116i20:209865 Dibromomethanc ND 0.5 ug/L 5030B 06/16!20207191 8260B 0606120:209865 1,2-Dichlorobcnzenc ND 0.5 ug/L 5030E 06116120:207191 8260B U61I6i20209865 1,3-Diehl o rob enzene ND 0.5 ug/L 5034E 06116120:207191 8260B Oh"16120209865 1,4-Dichlorobenzene ND 0.5 ug/L 5030B 0V16i20:207I91 8260E 06•'16120:209865 Dichloroditluoromethane ND 0.5 ug/L 5030E 06116120:2D7191 8260E W16120:209865 1,1-Dichloroethane ND 0.5 ug/L 503DB 06/16120:207191 9260E 06/16i20:209865 1,2-Dichloroethane ND 0.5 ug/L 503DB 06116120:207191 8260B Of>f16120:209865 1,1-Dichloroethylene ND 0.5 a IL 5030B 06116120:207191 8260B 06/16i20:209865 Page 3 of 14 Corporate OMces&Laboratory Ofrce&Laboratory Office&Laboratory Office&Laboratory Offlee&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E Linda Avenue 3442 Empress Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis 0hispo,CA 93401 VlsaI a.CA 93291 TEL:(805)392-2000 TEL:(209)942-0162 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-41721Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3607 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 6, 2020 Lab ID : SP 2007912-001 Description : Harvey Place Reservoir Customer ID 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/lD EPA 8260 cis-1,2-Dichloroethylcnc ND 0.5 uo� 5030B ON1600:2O7191 826OU 06/16120209865 trans-l,2-Dichloroethylcnc ND 0.5 ug/L 5030B 06116120:207191 82608 06116120209865 1,2-Dichloropropcne ND 0.5 ug�L 5030B ON16120:207191 826013 W16120:209865 1,3-Dichloropropcne ND 0.5 ug�L 5030B 06116r-O0207191 82608 OW 612 0 209 86 5 2,2-Dichloropropanc ND 0.5 ug/L 503013 0611612n:207191 826013 OW1 612 0 20 9 86 5 1,1-Dichloropropcnc ND 0.5 ug�L 5030B OU16120:207191 9260H 00/1 612 020 9 86 5 1,3-Dichloropropene(Total) ND -- ug/L 5030B OU16/20:207191 9260H 00i16120209R45S cis-1,3-Dichloropropcnc ND 0.5 ugh 5030B 06116 20:207191 8260H 0611h12020905 t ran s-1,3-Dichloropropcnc ND 0.5 ug/L 503OB 06116120:207191 8260A ONih'20209965 Di-isopropyl ether(DIPS) ND 5 ug�L 5030B 06/16i20:207191 8260H 06/W20-IOW65 Ethyl Benzene ND 0.5 ug/L 5030B 06116 0:207191 82619 ONih12 0209 96 5 Ethyl tert-butyl ether ND 2 ug/L 5030B o6116120:207191 826DB 06'16i20:209865 (ETBE) llexachlorobutadiene ND 5 ug/L 503013 06116120207191 8260B 06/16120209965 2-Hexanone ND 10 ug/L 5030B ON16/20207191 8260B O6'16/20:209965 Isopropylbenzene ND 0.5 ug/L 8030B 06116/20207191 8260u 06'16120:209865 p-Isopropyltoluene ND 0.5 ug/L 5030B 06116120:207191 826DB 06116'20:209965 Methyl tert-butyl ether (MTBE) ND 2 ug/L 5030B 00/16a02 6`o7191 826DL3 O16120209865 4-Mcthy I-2-pentanone (M1BK) ND lU ug/L 5030B 06116120:207191 82603 06I1fii202n91S65 Methylene Chloride ND 5 ug/L 5030H 06i 16+20207191 926013 06/16120209865 Naphthalene ND 5 ug/L 5030B n6116/20:207191 8260B O6'1612D:209865 n-Propylbenzene ND 0.5 ug/L 5030B ON 20207191 826013 06/16/20:209865 Styrene ND 0.5 ug/L 5030B 06116120:207191 826OR W16'20209965 tent-Amyl methyl ether (TAME) ND 5 u 6r glL 50348 ON OCJ o7191 826DB 16120:209865 1,1,1,2-Tetrachlorocthanc ND 0.5 ug�L 5030B 06/16/20:207191 92609 Oh'IW20209868 1,1,2,2-TetrachIoroethane ND 0.5 ug/L 5030B OU16/20:207191 8260H 0611hOO209868 Tetrachloroethylcne ND 0.5 ug�L 5030H ON16120;207191 826013 0611h120209865 Toluene ND 0.5 ug/L 5030B 06NU20207191 826013 06/16/20209865 1,2,3-Trlchlorobcnzone ND 5 ug/L 5030B ON 16/20207191 926013 06/16120209865 1,2,4-Trichlorobenzenc ND 5 ug/L 5D30B 0011W20:207191 926013 06/16120209865 1,1,1-Trichlorocthane ND 0.5 ug/L 500e 06i16/20;207191 926013 06/16120209865 1,1,2-Trichloroethane ND 0.5 ug/L 5D30B 06116/20:207191 9260B O611W2020986i5 Trichloroethylene ND 0.5 ug/L 5D30B 06116/20:207191 9260B O611W2020986i5 Trichlorofluoromethane ND 1 ug/L 5D30B 06116/20:207191 9260B 0h'IW20209865 1,2,4-TrimethylbenZene ND 0.5 ug/L 5D30B 06116/20:207191 9260B WIW20209865 1,3,5-Trimethylbencene ND 0,5 ug/L 5030B W16/20207191 826DB 06•16i2O:209865 Vinyl Acetate ND 10 ug/L 5030B 06'1(W20207191 62603 W 16/20:20986 5 Vinyl Chloride ND 0.5 ug/L 50WR 0611h120207191 826013 0h'I&20209965 lenes ND -- ug/L 50WR 061W20:207191 9260B W16,20:209965 Page 4 of 14 July b, 2020 Lab ID : SP 2007912-001 Description : Harvey Place Reservoir Customer ID 2-11369 Sample Result- Organic Constituent Result PQL [mils Note Sample Preparation Sample Analysis Method Date1113 Method Datc/11) EPA 8260 Xylenes m,p ND 2 ug/I. 5010H 06116120:207191 V60B 0N16/20:20%65 }C lenes o ND 2 u /L 5030B C&16120:207191 8260B 06116120:209969 ND=N on-lktected.PQL=Practical Quanli tat ion L.iinit.ISurrogate.*PQ1,adjusted for dilution. Page 5 of 14 ENVIRONMENTAL. AGRICULTMAL Analytical Cherrii-qs July 6, 2020 Lab ID : SP 2007912-002 Customer I❑ : 2-1 1369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : June 15, 2020-10:25 South Lake Tahoe, CA 96150 Sampled By ; B, Chernago Received On : June 16, 2020-11:58 Matrix : Waste Water Description ; Diamond Ditch ; at HPR outlet Project : AG72383 Sample Result-Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Datc/1D Method Datc/117 EPA 8260 4-Bromo11Ltorobenzenet 94.8 78-123 % 5030R 0611f:20:207191 82606 00/d 6/20;209865 Dibromotluoromethanef 87.0 65-125 % 50306 ONIU20;207191 8260B OW iV20:209865 1,2-Dichloroethane-d4l 89.1 58-144 % 50306 0&16/20-207191 826OB W16/20209865 Toluene-d8# 84.8 92-107 % 503OR 06116/20:207191 82606 I1h116/20:209865 Acetone ND 50 ug/L 5030B 06/16/20:207191 8260B 06116/20:209865 Acrolcin ND 50 ug/L 5030B OW16/20:207191 8260B W16r20:209865 Acrylonitrile ND 50 ug/L 5030B ON16;20:207191 8260B 06/16i20;209805 Benzene ND 0.5 ug/L 5030B 06116;20:207191 8260B 06/16120:209865 Bromobenzenc ND 0.5 ug/L 5030B 06116;20:207191 8260B 06/16120:209865 Bromochloromethane ND 0.5 ug1L 5030R 06116/20:207191 P606 06116/20209865 Brotrlodichloromethane ND 0.5 uo- 5030B 06.'l6120:207191 82606 0b.'l6r20:209865 Bromotorm ND 2 ug/L 5030B 06/16/20-207191 8260B 06/16120:209865 Bromoniethane N❑ 0.5 ug/L 5030B 06/16/20:207191 8260B 0&16120 20986 5 tcrt-Butanol N❑ 5 ug/L 5030B W1N20:20719I 8260B W16120:209865 2-Butanone(MEK) N❑ to ug/L 5030B ON1&20:207191 8260B 06/16120:209865 n-Butylbencene ND 0.5 ug/L 5030B 06/16120:207191 82606 06'16120:209965 sec-Bittylbenzene N❑ 0.5 «o/ 503013 06116120:21)7191 8260B W1&20:209961 tert-Butylbenzene ND 0.5 ug�L 5030B OW16120:207191 8260B W16,120:209965 Carbon Disulfide N❑ 10 ug/L W3013 06/16120:207191 8260B 06116120:209865 Carbon Tetrachloride ND l ug�L 5030B OW16/20:207191 9260B W16.120;20996i5 Chlorobenzene N❑ 0.5 ug/L 5030B OW16;20:207191 8260B 06/16120-209865 Chloroethane N❑ 1 ug/L 50306 OW16120207191 8260B 06;1h120-209865 Chloroform N❑ 1 ug/L 5030B OW16120:207191 9260B 0&(l612M09K65 Chloromethane N❑ 0.5 ug�L 5030B 00/16120:207191 9260B WIW20-209865 2-Chlorotolitene N❑ 0.5 ug/L 50303 OW16.20:207191 s260a O6/1612MO9865 4-ChlorotolLtene ND 0.5 Ltg�L 5030E 06/16120:207191 8260B 06/1612MO9865 ❑ibromochloromethane N❑ 2 ug/L 5030B OW16120:207191 9260B 06;1612Dz209865 Dibron]omethane ND 0.5 ug/L 5030B OW16120:207191 9260B 06116'2p:209865 1,2-Dichlorobencene ND 0.5 Ltg/L 5030B 06/16120:207191 9260B 06116.121):209865 1,3-Dichlorobenzme N❑ 0.5 ug/L 5030B OM6;20:207i91 9260B M16.121):209865 1,4-Dichlorobcnzcne N❑ 0.5 ug/L 5030B 06116120:207191 926013 06116,'20-209865 Dlchlorodifluoromethane N❑ 0.5 ug/L 503013 MQ6120:207191 8260B 06116120-2U9865 1,1-Dichloroethane N❑ 0.5 ug/L 5030B OW16;20:207191 82606 06i16120-209865 1,2-Dichloroethane ND 0.5 ug/L 50306 u6116;20:207191 8260B 0611 6/2 0-2098 65 1,1-Dichloroethylene N❑ 0.5 ug/L 50306 ON1&'20:207191 82606 0611R12 0-2098 65 Page 6 of 14 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office a Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E Linda 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)942-0162 TEL:(530)343.5818 TEL-(805)783-2940 TEL-(559)734-9473 Env FAX:(805)525-41721Ag 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 6, 2020 Lab ID : SP 2007912-002 Description . Diamond Ditch ; at HPR outlet Customer ID 2-1 1369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/lD Method Datc/lD EPA 8260 cis-1,2-Dichlorcethylene ND 0.5 ug/L 5W013 0611&20:207191 8260B 06116120:209865 trans-1,2-Dichloroethylene ND 0.5 ug/L 5030B 06116C20-207191 8260B 06i16120:209865 1,2-Dlchloropropene ND 0.5 ug/L 5W013 06116/20:207191 8260B 0611G120:209865 1,3-Dichloropropene ND 0.5 ug/L 5030B 06116120-207191 8260u 06116120:209865 2,2-Dichloropropene ND 0.5 ug/L 5030B 045116/20-207191 8260u 06;16120:209865 1,1-Di chloropropene ND 0,5 ug/L 5030B 06116120-207191 8260B 0 611612 0-2 0 9 96 5 1,3-Dichloropropene(Total) ND -- U&/L 5030B 045116/70:207191 826uu 06116120:209865 cis-1,3-Dichloropropene ND 0.5 ug/L 5030B 06116,20-207191 8260u 06,'16120:209965 trans-l,3-Dichloropropene ND 0.5 Lig/L 5030B 00!16/20 207191 8260B 06116120:209965 Di-isopropyl ether(DIPE) ND 5 Lig/L 5030B 06116,'20-207191 8260u 06116120:209865 Ethyl Benzene ND 0.5 up,/L 5030B 06;16120-207191 8260B 06116120:209865 Ethyl tert-butyl ether (ETBF,) ND 2 ug/L 50303 DG116i20207141 9260B 06116120-209865 Hexachlorobutadienc ND 5 ug/L 5030u 06116i20:207191 8260B 06i16120:209865 2-Hexanone ND 10 ug/L 503013 06,16/20:207191 MOB 0W 612 0-20986 5 Isopropylbcnzcne ND 0.5 ug/L 503013 061W20:207191 MOB 0N16120:209865 p-lsopropyltolucnc ND 0.5 ug/L 50303 06116/20:207191 9260B 06iJ6i20-209865 Methyl tort-butyl ether [MTB);) ND 2 ug/L 5030u 061161202 +'07191 8260R 061G120:209865 4-Methyl-2-pentanone [MIRK] ND 10 llg/I, 5030B 06116120207191 8260u 06116120-2D9865 Methylene Chloride ND 5 ug/L 503013 06i i6J20:207191 8260B 06116120:209865 Naphthalene ND 5 ug/L 5030B 06116/20:207191 9260B 06;1 612 0-2098 65 n-Propylknzene ND 0.5 ug/L 503013 06116120:207191 9260B 06;16i20:209865 Styrene ND 0.5 «g/L S03n8 06116/20-207191 8260u 06116120-209865 tert-Amyl methyl ether (TAME) ND 5 ug/L 50303 0616J20:207191 MOB 06+16120-209865 1,1,1,2-Telrachloroethane ND 0.5 ug/L 50303 06116/20207191 8260u 06116120-209865 1,1,2,2-Tetrachloroethane ND 0.5 ug/L 5030B 0611620-207191 8260B 06116/20:209865 Tetracbloroethylene ND 0.5 ug/L 5030B 06/16120-207191 8260B 06il6120:209865 Toluene 11.3 0.5 ug/L 503013 06116/20:207191 82603 06116i20:209865 1,2,3-Trichlorobenzene ND 5 ug/L 503013 06116/20:207191 8260B 06'16120:209865 1,2,4-Trichloroben7ene ND 5 ug/L 5030E 06.116120-207191 8260B 06116/2D:209865 1,1,1-Trichloroethane ND 0.5 Lig/L 5030B 06116/20-207191 8260B 06116.-2D:209865 1,1,2-Trichloroethane ND 0.5 ugll, 5030r3 06!1620-207191 8260B 06116120209865 Trichloroethylene ND 0.5 ugly 5030B 06i 1620-207191 8260B 06116/20209865 i'richloro[luoromelhane ND 1 ug/L 5030B 0611620207191 826013 06i 16120-209865 1,2,4-Trimethylbencene ND 0.5 ug/L 50308 ON16/20207191 9260B 0 61 16/2 0 2U9865 1,3,5-Triinethylbenzene ND 0.5 ug/L 503DB 061W20:207191 9260B 0611w-N-209865 Vinyl Acetate ND 10 ug/L 503DB 0610/20:207191 9260B 0611W20-209865 Vinyl Chloride ND 0.5 ug/L 503013 06116i20:207191 8260B W16.120:209865 X lenes ND j -- ug/L 503013 06116M:207191 8260B 06116/20:209865 Page 7 of 14 July 6,2020 Lab ID : SP 2007912-002 Description : Diamond Ditch ; at HPR outlet Customer ID 2-11369 Sample Result- Organic Constituent Result PQL Units Note Samplc Preparation Sample Analysis Method Date/lD I Method Date/ID EPA 8260 Xylenes m,p ND 2 uglL 5030E ONI6P--0:20719I H260B QVIU20:209865 Xylenes o ND 2 uglL 5WOB ON16/20:207191 V60H 06II6120:2098G5 ND—Non--0eIwed.PQL-PracricaI(l ianIiwItot!Limit.I+Sun-opte.*P Q L adjuswd for dilullon. Page 9 of 14 ENVIRONMENTAL ACiRICULTURAL July 6, 2020 Lab ID : SP 20079 t 2 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method DatellD Type Units Cone. QC Data DQO Note Organic 1,1,1,2=retrachloroethane 503013 06/16120:20719 1 VRG Blank uglL N❑ <0.5 NxBlk uu/L 0.000 IL5 1,1,1-Trichloroethane(1CA) 5030B 06/10/20:207191VRG Blank ugll. ND -0.5 ExBlk u L 0-000 12.5 1,1,2,2=1etrachloroethane 5030B 06/16/20:207191VRG Blank ug/L ND <.5 ExB1k uWL 0-000 12.5 1,1,2-Trichloroe than e 5030H 06116120:207191 VRG Blank ug1L ND -0.5 Ex Blk u L 0.000 12.5 1,1-Die[IloroctIlaLie 5030E 06/16120:207191VRG Blank uglL ND <0.5 ExBlk u L 0.000 12.5 1,1-Dic Home tliylcnc 5030B 06/16/20:207191VRG Blank uglL ND <.5 1.CS u611- 20.00 47.9% 52-137 325 MS ug/L 20.00 53.7% 25-179 (SP 2 0079 1 2-00 1) MSD uglL 20.00 65.2% 25-179 MSHPD uglL 25.00 193% <26 ExBlk u L 0.000 12.5 1,1-❑ichloropropenc 5030B 06/16/20:207191VRG Blank uglL Nil 0.5 HxHlk u IL 0,000 12,5 1,2,3-FrichIorobevene 5030B 06/16/20:207191VRG Blank uglL ND e5 ExBlk u IL 0.00 125 1,2,4-Trichlorobunzene 5030B 06/16/20:207191VRG Blank uglL ND <5 ExBlk a IL 0.00 125 1,2,4-Trimethylbenzene 5030B 06'16/20 207 1 9 1VRG Blank uglL ND <0.5 ExBlk u IL 0.000 12.5 1,2-Dichlombenzane 5030B 06/16/20:207191VRG Blank uglL ND <0.5 ExB]k a IL 0.000 12.5 1,2-DiAlomcthanc(EDQ 5030B 06116/20:207191VRG Blank uglL ND <0.5 FixHlk u rIL 0.000 12-5 1,2-13ichlomethane-d4 5030B 06/16/20;207191 VRG Blank uglL 25.00 87.8% 58-144 LCS uglL 25.00 85.2% 58-144 MS uglL 25,00 88-5% 0-200 (SP 2007912-001) MSD uglL 25.00 88.5% 0-200 MSRP❑ uglL 25.00 0.009% :520.0 ExB]k u IL 0.0% NIA 1,2-Dich]oropmpane 5030B 06116120:207191VRG Blank uglL ND <05 ExBlk u g L 0.000 12.5 1,3,5-Trirnuthylbcnzcnc 5030B 06/16/20:20719I VRG Blank uglL ND <0.5 ExBlk u IL 0.000 12.5 1,3-Dichlorubunzene 5030B 06/16120:207191 VRG Blank uglL ND <0.5 ExBlk u IL 0.000 12.5 1,3-Dichloropropane 5030B 06.116/20:207191VRG BIattk uglL ND <0.5 L;xBik u IL 0.000 12.5 1,4-Dichlorobenzene 5030E 06/16120:207191VRG Blank uglL ND <0.5 KxBlk u*IL 0.000 12.5 2-Dichloropropanc 5030B 06/16/20:207191VRG Blank uglL ND <0.5 F:xBlk u 11. 0.000 12.5 2-Bulanone(M HK) 503013 06/16/20:207191 VRG Blank uglL ND =10 F:xBlk tt IL 0.0 250 Chlorotoluene 5030B 06116/20:207191 VRG Blank uglL ND <0.5 HxBlk u IL 0,000 125 Hexanone 50303 06/16/20:207191VRG Blank uglL ND <10 ExBlk a IL 0.0 250 -13romofluoroben7ene 503013 106/16/20:207191 VRG Blank uglL 25.00 93.5% 78-123 LCS ug.'L 25.00 88.0% 78-123 M5 a r1I. 25,00 95,2% 0-200 Page 9 of 14 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory BS3 Corporation Street 2500 Stagecoach Road 563 E LindoAvenue 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)942-0152 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(605)525-41721Ag FAH:(1305)392-2063 FAX:(209)942-0423 FAX:(530)343-3B07 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 2773 CA FLAP Certification No 2810 July 6,2020 Lab ID : SP 2007912 South Tahoe Public Utility District Customer : 2-11369 Quality Control-Organic Constituent Method Date/lD Type Units canc. QC Data 11QO Ni)te Organic Bi0111011Ltorobenxene 5030H (SP 2007912-001) MSD ugiL 25.00 96.6% 0-200 MSRPD ug/L 25.00 13% <20.0 ExBlk u IL 0.0% NIA C.'hlorotoluene 5030H 06/16/20207191 VRG Blank ug/L ND <0.5 ExBlk u IL 0.000 12.5 Methyl-2-pc ntanone(MIRK) 503013 00/16120:207191 VRG Blank ug/L ND <10 ExBlk a IL 0.0 250 Ace(anc 5030B 06i16120:207191VRG Blank ug/L ND <50 L•xB1k a !L 0.0 1250 crolcin 5030B 06.16/20:207191VRG Blank ug1L ND <50 FxBlk u riL 0.0 1250 cryloninilc 5030B 06/16.'20:207191VRG Blank ug/L N❑ <50 HxB]k u L 0.0 1250 Hen7ene 503013 06.11612U2U7191VRG Blank ug/L ND =0.5 LCS ug1L 20.00 82.1 % 60-134 MS ug/L 20.00 79.9% 47-169 (SP 2007912.001) MSD ug/L 20.00 104% 47-169 MSRPD ug/L 25.00 25.9% _<24 435 ExBlk ug/L 0.000 12.5 Bromobenxene 5030B 06 16/20:207191 VRG Blank ug'1- ND c0.5 EXB1k u L O.00U 12.5 Bromochloromcthane 5030B 06/16/20:207191 VRG Blank ug/L ND <0.5 ExBlk u L 0'" 12.5 Bromndichlnna net hane 50303 06/10/20:207191 VRG Blank ugll. ND <0.5 EHB1k uvJL 0.000 12.5 Brotnuform 5030E 06/10,120207191 VRG Blank ug/L ND Q fixBlk ug/L 0.0 50 Hromornoliane(Methyl Bromide) 503013 06116120:207191VRG Blank ug/L ND -�0.5 ExBlk uty1L 0.000 12.5 Carbon Disulfide 5030B 06'16/20:207191 VRG Blank ug/L ND <10 ExBlk ug/L 0.0 250 'arbonTcrraehlortdc 5030B 06/16/20:207191VRG Blank uWL ND <1 1 xH1k u '1. 0.00 25 hlorobenxene 5030H 06/16/20:207191 VRG Blank ug'L ND <0.5 LCS ug/L 20.00 109%, 56-152 M$ u gl I. 20.00 107% 31-212 (SP 2007912-001) MSD ug/L 20.00 137% 31-212 MSRPD ugiL 25.00 25.1% <27 ExBlk u_,r'L 0,000 12.5 'hloroethane(F-thyl Chloride) 5030B 06116/20:20719[VRG Blank ug'L ND <1 h:xl3lk u r L 0.00 25 'hlorotorm 5030B 06116/20:207191 VRG BIank ug1L ND <1 FXH]k a r'I. 0.00 25 'hloromcthane(Mc(hylChloride) 5030B 06'16'20:207191VRG Blank ug/L ND -:�0.5 FxB]k u rll. 0.000 12.5 6s-1,2-I)icliloroethylene 5030B 06116/20:207191VRG Blank ug,L ND <0.5 hxB]k u 11. 0,000 12.5 is-1,3-Dichloropropetic 5030B 06/16/20:207191VRG Blank ug/L ND <D.5 FxB1k u IL 0.000 12.5 Dibromochloromefhanc 5030B 06/16,'20:20719IVRG Blank ug/L ND <2 ExBlk ug/L 0.0 50 1)ibromofluroniefhatie 5030B 0616/20:207191 VRG Blank ug/L 25.00 88.8% 65-125 LCS ug/L 25.00 84.04E, 65-125 MS I L 25.00 90,1 % 0-200 Page 10 of 14 July 6, 2020 Lab ID : SP 2007912 South Tahoe Puhlic Utility District Customer : 2-1 1369 Quality Control-Organic Constituent Method Date/ID Type Units Cone. QC Data DQO Note Organic Dibmmofluro nethane 5030B (SI'2007912-001) MSD ug/L 25.00 87.2% 0-200 MSRPD ug/L 25.00 3.3% =20.0 ExBlk a IL 0.0°/i NIA Dibroinornethane 503013 06116/20:207191VR(; Blank ug/L ND ¢0.5 ExBlk ug/L 0.000 12.5 DichIorodif]wromethane 5030B 06116/20:207191VRG Hlank uglt. ND <0.5 ExBlk ue1L 0.000 12.5 Dichlorumethane 5030B 06116/20:207191 VRG Blank ug/L ND <5 GxBlk u IL 10.19 125 Ethyl terL-Butyl Elher 5030B 00/16/20:207191 VRG Blank ugeL ND <2 F:xBlk ug/L 0.0 50 Ethylbcnzcnc 5030B 06/16120:20719IVRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 Freon-11 503013 06/16/20207191VRG Blank ug/L ND <1 ExBlk ugJL 0.00 25 Hexachlorohutadiene 5030B 06/16120:207191 VRG Blank ug/L N❑ <5 F:xBlk u IL 0.00 125 Isopropyl Ether 5030B 06/16120:207191VRG Blank ug/L ND <5 F:xBlk a IL 0.00 123 Isopropylben7ene 5030B 06/16120;207191VRG Blank ug/L ND <0.5 ExBlk u IL 0.000 12.5 Methyl terr-Bury]Ethcr(MTBE) 5030B 06116120:207191VRG Blank ug/L ND 4 ExBlk ug/L 0.0 50 Naphthalene 5030B 06/16/20;207191VRG Blank ug/L ND <5 ExBlk ug/L 0.00 125 -Butylbenzene 5030B 06/16120:207191VRG Blank ug/L ND <0.5 ExBlk u L 0.000 12.5 -Propylhenzene 503013 06/16/20:207191VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 -Isopropyl toluene 5030B 06116/20:207191VRG Blank ug/L ND <0.5 ExBIk u 'L 0.000 12.5 see-Butylbenzetic 5030B 06/16/20:207191VRG Blank ug/L ND N.5 ExBlk ug/L 0.000 12.5 Styrene 5030B 06/16/20:207191 VRG Blank ug/L ND <0.5 ExBlk u 0.000 12.5 TAME 5030B 06116120:207191VRG Blank uglL IND <5 ExBlk u L 0.00 125 cu-Butanul 5030B 06/16/20:207191VRG Blank ug1L ND <5 ExBlk u LL 0.00 125 lent-BuLylbencene 5030B 06/16/20:207191VRG Blank ug/L N•D <0.5 ExHlk ug/L 0.000 12.5 Fetrachloroethylene(PC E) 5030B 06/16/20:207191VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 Foluene 5030B 06/16/20:207191VRG Blank uWL ND <0.5 LCS ug/L 20.00 78.5% 56-131 MS ug/L 20.00 74.5'No 44-164 (SP 2007912-001) MSD ug/L 20.00 96.5% 44-164 MSRPD ug/L 25.00 25.7% <30 ExBlk ug/L 0.000 12.5 Toluene-d8 5030B 06/16/20:207191VR.G Blank ug/L 25.00 82,8% 92-107 LCS uglL 25.00 84.0% 92-107 325 MS ug/L 25.00 82,7% 0-200 (SP 20D7912-001) MSD ugIL 25.00 83.3% 0-200 MSKPI) ug/L 1 25.00 0.8% �20 Page 11 of 14 July 6, 2020 Lab 11) : SP 2007912 South Tahoe Public Utility District Customer -. 2-11369 Quality Control-Organic Constituent Method Date/1D Type Units Cone. QC Data 1)QO Note Organic ❑Ittcnc-d8 5030B 06/16/20:207191 VRG Gx31k it IL U.0% NIA trans-1,2-Dichlaraethylene 5030H 06/16/20207191VRG Blank ug/L ND <0.5 Gx31k ilgJL 0.000 12.5 1rans-1,3-Dichloropnrpene 5030B 06/16/20:207191VRG Blank ug/L [till '0.5 Lx31k It=1. 0,000 12.5 lrichIoroe thy lene[I Ch) 5030B 06r 16/20:207191 VRG Blank ug/L ND <0.5 I.CS ug/L 2000. 79,091, 61-123 V!S ugll- 20,00 81.7'% 41-167 (5P2007912-001) XISD ug/L 20,00 106°4o 41-167 :V4SRPD ug1l, 25.00 25.7% 532 ExBlk u L 0,000 12.5 Vinyl Acetate 503013 06.'16120207191 V1t6 B lankug'L ND to ug/L W) 250 Vinyl Chloride 5030B 06i16120:207191VRG ug,L ND --0.5 u 'L 0.000 12.5 yICncsm,p 5030B 06/16/202o7191VRG uWL ND <2 u 'L 0.0 50 Xylenes o 503013 06.'16/20;207191 VRG Blank ug'L ND <2 E x B I k u•1. O.o 50 1,1,1,2-Tetrachlo roe Ihane 8266E 06/16/20:2o9865VRG CCV a /L 25.00 109 io 70-130 1,1,1-IYichloroethane(T(:A) 8260B 06/16/20-209965VRG CCV a /L 25.O0 87.4% 70-130 1,1,2,2 Jet rachlo roe tharic 8260B 06/16/20209865VR6 CCV u 'L 25.O0 98.40/, 70-130 1,1,2-Tn 011 10TOC tharlL' 8266E 0 6/1 6120 2o9865VRG CCTV uR L 25.00 86.3% 70-130 1,1-Dichloroethane 8266E 06/16.'20:209865VRG CCV ug/L 25,00 77.7% 70-130 I.1-1)ichIoroeth Iene 8260B 06,'16/20209965VRG CCTV u 'L 25,00 89.30/o 80-120 1.1-Dichlora ro eric 9260B 06/16120209865VRG CCV u 1. 25.00 87.1% 70-130 1,2,3-Trichlorubcncene 8260B 06/16.'20209865VRG CCV u L 25.00 203% 70-130 360 1,2,4=l1-ichloroben7.ene 8260B 06/16120-209965VRG CCV « /L 25.O0 149% 70-130 360 1,2,4-Trimeth (benzene 8260B 06.'16/20:209865VR6 CCV u 'L 25,00 114% 70-130 1,2-Dich1orobu1zcnc 8260B 06/16,'20209865VRG CCTV &L 25.00 116% 70-130 I,2-Dichloroethane([-DC:) 8260B 06/1G'2D:209865VRG CCV u L 25.00 78.2'% 70-130 1.2-Dichloroethane-d4 826013 06/1612U:2U9865 V RG CCV u 'L 25.00 89.7 0K 70-130 11-Dichlora ra uric 8260B 06/16120:209965VRG CCV a 'L 25.00 81,4% 90-120 1,3,5=trimeth (benzene 8260B 0 6/1 6120-20 9 865VRG CCV a /L 25.O0 1094ya 70-130 1.3-❑ichlorobcnzcnc 82603 06/16/20:209865VRG CCV u L 25.O0 117% 70-130 1.3-Dichlora ro nne 8260B 06/16/20:209865VRG CCV ug/L 25.00 101% 70-130 [A-Dichlorobenzene 8260B 06/16.'20209965V[tG CCTV « ?L 25.00 1191`% 70-130 2-Dichlora ro anc 826DB 06.'16120209865VRG CCV u l- 25.00 82,5% 70-130 2-Butanone(MEK) 8260B 06/1 6120-20 9 8 6 5VRG CCV a /L ]OD.o 61.0°fin 50-150 2-Chlorotoluene 8260B 06/16/20209865VRG CCV ug1. 25.00 114% 70-130 2-Hexanone 8260B 06/16120-209865VRG CCV u L 10D.0 85,4% 50-150 BromofluorobenZCne(BFB) 8260B 06116120:209865VRG CCV a I, 25.00 100% 70-130 C:hlorotoluene 8260B O6/16/2D:209865VRG CCV ug/L 25.00 115% 70-130 Meth ]-2-perkta non c(MIBK) 8260B 06/16120209865VRG CCV ug/L 100.0 65.9% 50-150 cetone 9260E Ofi/16120-209865VRG CCV a 'L 100.0 60.4% 50-150 crolcin 9260B 06/16120:209865VRG CCV u 1l. 40.00 230% 50-I50 360 ci lonitrile 8266B 06116/20;209865VRG CCV ug/L 40.00 875% 50-150 360 Benzene 826013 06/16/20:209865VR6 CCV ug/L 25.00 96.70/o 70-130 Bmmobenrene 9260B 06/16/20:209965VPC; CCV u,/L 25.00 112% 70-130 Bromochloromethane 826013 06/16/2020980577G CCV u 'L 25.00 83.20/o 70-130 Bromudichlonmicthanc 9260B 06/16.'20:209865VRG CCTV a-IL 25,00 87.4% 70-130 Bromoform I 8260B 06;16/20209965VRG CCV u L 25.00 119°/, 70-130 Bronwntcthanc(Muth 1 Bruiuidc] I 8260B 06.116.20209865VRG CCV I a ,11. 25.U{1 107% 70-130 Page 12 of l4 July 6, 2020 Lab ID : SP 2007912 South Tahoe Public Utility District Customer : 2-1 1369 Quality Control-Organic Constituent Method Date11D Type Units Cone. QC Data DQO Note Organic Carbon Disulfide 8260B 06110/20209865VRCi CCV u IL 100-0 54.3% 50-150 Carbon Tetrachloride 8260B 06/16/20:209865VRG CCV a IL 25.00 96.7% 70-130 lilw-obenZene 8260E 00116i20209865VRG CCV uglL 25-00 112%, 70-130 'hloroethanc(Uh 1 Chlondc) 8260B 06/16/20:209865VRG CCV a IL 25.00 101% 70-130 hlorofonn 8260E 06116/20:209865VRG CCV u L 25.00 82.2% 80-120 hIoromethanc(Methyl Chloride) 8260B 06/16/20:209965VRG CCV u /L 25.00 83.6% 70-130 is-1.2-DichIoroeth Iene 8260B 06/16/20:209965VRG CCV u IL 25.00 86.2% 70-130 is-1,3-Dichloro ro ene 8260B 06/16/20:209865VRG CCV u IL. 25,00 82.2%, 70-130 Dibronwchloromethane 8260B 06/16/20:209865VRO CCV a ,'L 25.00 110% 70-130 Dibromofiuromethane 826013 06116/20:209865VIZG CCV u L 25-00 88.6%. 70-130 Dibromomcthane 826013 06/16120:209865VRG CCV u IL 25.00 86.8% 70-130 Dichiorudiflucuumcibane 8260B 06/i6/20:209865VRG CCV u L 25.00 70.2% 70-130 Dichloromethane 826011 06/16/20209865VIZO CCV uglL 25.00 80.0% 70-130 h1h l tcrt-Bu! I lather 8260E 06/16/20:209865VRG CCV u IL 25.00 89.6% 50-150 Eth ibenzene 8260B 06/16/20:209865VRO CCV u L 25.00 110% 80-120 1 eX ach I01-Obtltadiene 826013 06/16/20209865VRG CCV u L 25-00 114%. 70-130 lso ro 1 Ether 8260B 06/16/20:209865VRG CCV u IL 25.00 87.4% 50-150 lsopropylbenzene 8260B 06/16/20:209865VRG CCV tt !L 25.00 1 i 1% 70-130 Meth yl tert-Bu tyl Hther 9260B 061 1 6120 2098 65VRG CCV ugIL 25.00 92.2% 70-130 Naphthalene 8260B 06/16/20:209865VRG CCV u=1- 25-00 187% 70-130 1 360 i-But Ibcnzene 8260B 06/16120:209865VRG CCV u IL 25.00 113% 70-130 ii-llropylben7crie 8260B 06/16/20:209865VRO CCV u L 25.00 113% 70-130 p-isopropy]toluene 8260B 06/16/20:209865VRG CCV u L 25.00 113% 70-130 sec-Butvlbenzene 8260B 06/16/20:209865VRG CCV u /L 25,00 115% 70-130 Styr= 8260B 06/16120:209865VRG CCV tt IL 25.00 110% 70-130 TAME 8260B 06/16/20:209865VRG CCV u IL 25.00 95.4% 1 50-150 tert-Butanol 8260B 06/16/20:209865VIiG CCV u L 125.0 74.8%. 50-150 lcrs-13in Ibenzene 8260B 06/16120:209865VR(3 CCV u L 25.00 117% 70-130 1'etrachloructh Iene IPCF) 8260B 06/16120:209865VRG CCV u L 25.00 108% 70430 Toluene 826013 06/16/20209865VIiG CCV u L 25-00 87.0%. 80-120 Toluene-d8 8260B 06/16120:209865VRG CCV u L 25.00 90.0°% 70-130 tans-1.2-Dichlo roe thy Iene 8260B 06/16120:209865VRO CCV u L 25.00 85.2% 70-130 trans-l,3-Dichloro propene 8260B 06/16120:209865VIZO CCV u L 25,00 80.6%. 1 70-130 Trichlorocth lent(TCE) 8260B 06/16120:209865VRG CCV u L 25.00 94.4% 70-130 Trichlorofluoromethane F-1 1 8260B 06/16/20:209865VRG CCV uWL 25.00 104% 70-130 Vinyl Acetate 8260B 06/16/20:209865VRG CCV u L 100,0 64.6°I. 50-150 Vinv]Chloride 8260B 06/16120:209865VRG CCV u WL 25.00 99.2% 80-120 x lrne mp 8260B 06/16/20:209865VRG CCV uWL 50.00 114% 70-130 }C lcncs❑ 8260B 06/16/20209865VRG, CCV u=L 1 25.00 1 114% 70-130 Definition CCV Continuing Calibration Verification-Analyzed to verify the instrument calibration is within criteria. Blank Method Blank-Prepared to verify that rho preparation process is not contributing con rain ination to the samples. FxBlk TCLPISTLC Extraction Blank-Prepared to verify that the preparation process is not contributing contamination to the samples. LCS Laboratory Control StandardlSamplc-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. MS13 :Matrix Spike Duplicate of MSIMSD pair-A random sample duplicate is spiked with:t known amount of analyte.The recoveries are an indication of how that sample matrix affects analyte recovery- MSRI'D :MS'MSD Relative Percent Difference(RPD)-The MS relative percent difluruncc is an indication of precision for the preparation and analysis. ND Non-detect-Result was below rho DQD listed fur the atutlyle. DQO Data Quality Objective-This is the criteria against which the gtiality control data is compared. Explanation 325 The LC was out of ace e [ante limits.Results irlay be biased low. Page 13 of 14 July 6, 2020 Lab ID : SP 2007912 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Explanation 360 CC above Acceptance Mange(AR).Samples which were non detect for[his analytc were accepted. 435 S amp le matrix m ay be a ffcc ti ng this anal te.Data was accepted based on the LC or CC k-ecovery. Page 14 of 14 CHAIN OF CUSTODY South Tahoe Public Utility District Lab Sent FGL Preservatives: Tum-Around-Time: 1275 Meadow Crest Drive �- 4 C Standard South Lake Tahoe,CA 96150 Sampler[s): B,Chelnago VCC-HCI Phone:(530)-543-6231 I � 1 � r a Collection Lab ID# Sample Site Date&Time ►D72392 HPR Harrow Piece Ra nrWr 06r a=o 10:52 VM Ix AG72383 on-ar bland oRdr Q Booki" 6tut or oramoed bitch;at HPR 06r16r1020 10:26 VAT *Wet RV 7707 0412 5299 . : Report MTBE to 0.2 ugll Relinquished by: ® n Received by: _Analyse Travel and Fekt blanks only iLdr,59rhrP]!b1e7V& ells- Use Signature Signature __Use Calif State WriteOn to report upells. print YI Print Company South TahoePublic Util' Dls ' Company a - 1 6 1 -0-0 Date: Time: Comments: Giu,, Relinquished by: Reoeived by. Signature •fhCJf� Signature aw Print Prirrt Company Company V Date: T:me: ll Data: Time: Page 1 of 1 FGL Environmental Doc ID:2DO900157 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 7707-0412-5290 3.Were samples received in a chilled condition? Temps: 5 1 I 1 1 1 1 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. ❑o the number of bottles received agree with the Yes No NIA COc? 6.Verify sample date,time, sampler Yes No NIA 7.Were the samples received intact?(i.e. no broken Yes No bottles, leaks,etc.) 8.Were sample custody seals intact? Yes No N1A 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 NIA FGL properly preserved? [Exception:Oil&Grease,VOA and CM verified in lab] 4.VOAs checked for Headspace? Yes No NIA 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 NIA accepted? Include a copy of the COC for lab delivery. (Bacti. Inorganics and Radio) Sample Receipt, Login and Verification completed b : Reviewed and ❑grtY1y 99Md by W02 COVarrubias p p g p y Inez Covarrubias , s,mnas�«-�n Approved By ome OW I&I'l (1.13 07 31, 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 2007912 IV-06/16/2020-13:02:35 MTBE Results Lower Sample Reporting Sample Site Date ID# Parameter Result Units Limit Method WWTP Final Effluent 02/20/2020 AG70859 MTBE N❑ ug/L 3.0 EPA 524.2 05/21/2020 AG71989 MTBE N❑ ug1L 0.2 EPA8260 08/13/2020 AG73325 MTBE N❑ ug/L 2 EPA 82608 12/14/2020 AG75251 MTBE N❑ ug/L 2 EPA 8260B Harvey Place Reservoir 06115/2020 AG72382 MTBE N❑ ugIL 0.2 EPA8260 HPR Effluent 06/1512020 AG72383 MTBE N❑ ugIL 0.2 EPA8260 N❑ =Not Detected at of above Lower Reporting Limit uglL =micrograms per liter or parts per 611p1on 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 1-4554-43, 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. Beginning April 15, 2424 thru December 31, 2424, STPUD Laboratory outsourced TKN Analysis. Samples were sent to BSK Laboratories in Fresno CA. EPA Method 351.2 was used. We have resumed analyzing TKN using the Total Nitrogen method in 2421. rcye 1 ul 1,3 (JERA A Waters Company Dan Arce South Tahoe Public Utilities District 1275 Meadow Crest Dr. South Lake Tahoe, CA 96150 USA WP-300 Final Report TM WatR TM Pollution Proficiency Testing WatRTM Pollution Study Open Date: 01/ 13120 Close Date: 02/27/20 Report Issued Date: 03/02/20 Study It:WP-300 rdye��i i a (JERA A Waters Company March 2, 2020 Dan Arce South Tahoe Public Utilities District 1276 Meadow Crest Dr. South Lake Tahoe, CA 96150 Enclosed is your final report for ERA's WP-300 WatR TI 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-300 WatR TM Pollution Proficiency Testing study have been evaluated using the following tiered approach. If the analyte is listed in the most current TNIINELAP 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 TN1 Standard, Volume 3. If the analyte is not included in the TNIINELAP 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-300 WatRTMPollution 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-300 rage J OF i 3 &) ERA. A Waters Company Report Recipient Contact/Phone Number Reporting Type California ELAP Christine Sotela/916-341-5175 All Analytes Study#:WP-300 rage4or is QERA A Waters Company WP-300 Definitions & Study Discussion Study Dates: 01113/20 -02/27120 Report Issued: 03102/20 WP Study Definitions WR Study Discussion The Reported Value is the value that the laboratory reported ERA's WP-300 WatRTMPoilution Proficiency Testing study to ERA, has been reviewed by ERA senior management and certified compliant with the requirements of the 2009 TNI Standard The ERA Assigned Values are compliant with the most and the 2016 TNI Standard,Volume 3, Section 5.9 and the current TNIINELAP Fields of Proficiency Testing(FoPT)table. criteria contained in the most current TNIINELAP Fields of A parameter not added to the standard is given an Assigned Proficiency Testing (FoPT)table. Value of"a PTRL"per the guidelines contained in the 2009 TNI Standards. The assigned values are directly traceable to ERA's WP-300 WatR-1mPollution study standards were the commercially prepared starting materials used to examined for any anomalies. A full review of all homogeneity, manufacture the PT standards. stability and accuracy verification data was completed. All analytical verification data for all analytes met the acceptance The Acceptance Limits are established per the criteria criteria contained in the 2009 TNI Standard and the criteria contained in the most current TNIINELAP FoPT table or contained in the most current TNIINELAP FoPT table. ERA's SOP for the Generation of Performance Acceptance Limits TM as applicable. This report is scored by the criteria in All analytes are included in ERA's A21 A accreditation, the 2016 TNI Standard,Volume 3, instead of by the criteria in certification number 1539.01. the 2009 TNI Standard to which the Proficiency Testing Provider is accredited. This is a planned change and is All activities associated with this proficiency testing study endorsed by the TNI Proficiency Testing Program Executive were performed by Waters/ERA with the exception of those Committee for transition to the 2016 TNI Standard. noted below. The following physical sampleslproducts 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 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. Not Acceptable = Reported Value Falls outside the ERA's WP-300 WatRTMPollution study reports shall not be Acceptance Limits. 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 No Evaluation = Reported Value cannot be evaluated. endorsement by any agency of the U.S.government. The data contained herein are confidential and intended for your use only. Not Reported = No Value reported, If you have any questions or concerns regarding your assessment in ERA's WatRTMPollution Proficiency Testing The Method Description is the method the laboratory reported program, please contact our Proficiency Testing Department to ERA. at 1-800-372-0122. Study#:WP-300 iCCF_ eo 0 I F luWP-300 Laboratory Exception Report A Waters Company Dan Arce EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District Report Issued: 03102/20 1275 Meadow Crest Dr. Study Dates: 01/13120 -02127120 South Lake Tahoe, CA 96150 (530)50-0231 Not Acceptable Evaluations There were no Not Acceptable evaluations for this study. This report is scored by the criteria in the 2016 TNI Standard,Volume 3,instead of by the cnteria in the 2009 TNI Standard to which the Proficiency Testing Provider is accredited. This Is a planned change and is endorsed by the TN1 Proficiency Testing Program Executive Committee for transition 1a the 2016 TNI Standard. 16341 Table Mountain Pkwy•Golden,CO 60403.800.372,0122 •303.431,6454•fax 303.421.0159•www.eragc.com Study#:WP-300 ]ERA A Waters Company Final Report Results For Laboratory South Tahoe Public Utilities District "�' 16341 Table Mountain Pkwy •Golden, CO 60403.600.372,0122.303.431.8454 •fax 303.421.0159•www.eragc.com Study#:WP-300 &) FARA A Waters Company Final Evaluation Report Study: WP-300 ERA Customer Number: S586001 Laboratory Name: South Tahoe Public Utilities District o g . esults 16341 Table Mountain Pkwy•Golden,CO 80403•800.372.0122.303.431.8454•fax 303.421,0159•www.era c.00m Study#:WP-300 q i ERA WP-300 Final Evaluation Report A Waters Company Dan Arce EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District Report Issued: 03/02120 1275 Meadow Crest Dr. Study Dates: 01/13120-02/27/20 South Lake Tahoe, CA 96150 (530)543-6231 Atudy naNyte Analyse Units Reported Assigned Acceptance Performance Method Description Analysis 2 Score Study Standard Analyst Name Code Value Value L.lmiss Evaluation Data Mean Deviation NP Minerals(cat#581,lot#P300-506J 1505 Alkalinity as CaCC3 mglL 49.8 50.7 43,1-58.3 Acceptable SM232Da-2011 2011 1f2312020 0,107 49,5 2,61 Sierra Korige 1575 Chloride mg1L 74.4 76.0 66.4-85.8 Acceptable EPA 300 0 2.1 1 S93 V23)2020 -0.137 74.7 2.41 BCIDT 1610 ConductMty at 25°C pmhoslcm 453 458 412-504 Acceptable su2swe-MI1201t 112N2020 -0-196 456 14.1 Sierra Konge 1730 Fluoride mglL 3.35 3.47 2,81-3.99 Acceptable EPA 300.02.11993 1/23/2020 -0.210 3.38 0.166 BC1DT 1125 Potassium mglL 35.2 28.2-42.2 Not Reported 34.4 1.73 1155 Sodium mglL 71.8 57 4-86.2 Not Reported 70.0 4.03 2000 Sulfate argil 33.5 34.4 27.9-39.6 Acceptable aFA300.0211BB3 10312020 0,261 33.2 1.60 BC 1 DT 1955 Total Dissolved Solids at 180°C mglL 300 296 251-341 Acceptable SM 2540 C-2011 2011 1/24/2020 0.293 296 14.5 SK 1 DT 1950 Total Solids at 105°C rngi 308 261-351 Not Reported 304 17.4 WP Hardness(cat#580,lot#P300.507) 1960 Total Suspended Solids rng1L 71.3 57.6-79.9 Not Reported 66.6 3.64 1035 calcium mglL 36.8 37.0 31,4-42.6 Acceptable SM3500-CaB-20112011 1/27/2020 0.498 36.0 1.55 Michal Lieberman 1085 Magnesium rng1L 37.1 31.5-42.7 Not Reported 36.9 1.50 1550 Icalcium Hardness as caco3 mglL 91.8 92.4 78.5-106 Acceptable ISM 3500La 8-2011 2U11 V2712020 0.553 897 3.75 Michal Lieberman 1755 otal Hardness as CaCO3 mglL 247 245 208-282 Acceptable SM 2340 C-Ml1 2011 V2812020 0.722 240 9.46 Michal Lieberman IMP phi(cat#577,lot#P300.977) 1900 pH S.U. 1 6.72 1 6.70 1 O-W-M Aciclill a 1/26V202t1 0.353 6.71 0,0401 Michel Ueberman IMP Settleable Solids(cat#883,lot^#P300-911) 1965 Is ettleable So" mL(L 20 18-2 1,4:4--Ziff Acaepteble sMSl140F:4e112oi 1r=i120 0.485 1112, 1.55 SietreKofte This report is scored by the criteria in the 2016 TNI Standard,Volume 3, instead of by the criteria in the 2009 TNI Standard to which the Proficiency Testing Provider is accredited. This is a planned change and is endorsed by the TNI Proficiency Testing Program Executive Committee for transition to the 2016 TNI Standard. MIK ICC5-45-1�4-w �& 16341 Table Mountain Pkwy-Golden, CO 80403 -800,372.0122-303.431.8454•fax 303.421.0159•www.eragc.com study#:WP-300 &) ERA WP-300 Final Evaluation Report A Waters Company Dan Arce EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District Report Issued: 03/02120 1275 Meadow Crest Dr. Study Dates; 01113/20-02/27120 South Lake Tahoe, CA 96150 (530) 543-6231 TNI Reported Assigned Acceptance Performance Analysts study Stu Ady nalyse Ana" Units Value Value urns Evaluation Method Description Date Z Score Mean standard Analyst Name Code Deviation WP Solids Concentrate(cat#4030,lot#P300-4032) 1960 Total Suspended Solids rnglL 96.9 98.9 81.9-109 Acceptable am2540 D-2011 xi 1123/2020 0.425 95.6 3.04 Michal Lieberman 1955 Total Dissolved Solids at 180'C mglL 251 235 190-280 Acceptable SM 2540 C-2011 2011 1/2312020 0.264 247 15.5 sierra Korlge 1950 Total Solids at 105°C mg1L 346 301-391 Not Reported 337 13.5 WP Simple Nutrients(cat#584,lott#P300-505) 1515 Ammonia as N mglL 3.87 3.88 2.95-4.a6 Acceptable EPA 350.12 1993 1124(2020 -0.334 3.97 0.266 Delores Trebotich 1820 Nitrate+Nitrite as N mglL 5.69 5,65 4,64-6.61 Acceptable $M 450"03 r-2011.2011 112412020 0.313 5.60 0.286 Delores Trebotich 1810 Nitrate as N mg1L 5.69 6.65 4.59-6.69 Acceptable SM 45W.NO3 F•2011 2011 1/24/2020 0.330 5.59 0.292 Delores Trebotich 1870 urtho-Phosphate as P rn91L 3.12 3.11 Z64-3.58 Acceptable sM450o-F E-201.2011 112412020 -0.172 3.15 0.176 Michal Lieberman WP Simple Nutrients(cat#584,lot#P300.505) 1515 Ammonia as N m91L 3.88 2.95-4.86 Not Reported i 3.97 0.266 1820 Nitrate+Nitrite as N mglL 5.80 5.65 4,64-6,61 Acceptable EPA 300.02.1 1903 1/2312020 0.698 5.60 0,286 BC/DT 1810 Nitrate as N rri 5.80 6,65 4.59-6.69 Acceptable EPA 300.0 2.1 1993 112=020 0.707 5.59 0,292 BC 1 DT 1870 ortho-Phosphate as P rng1L 3.51 3.11 2.64-3.58 Acceptable EPA 300.0 2,1 1993 1/23/2020 2,05 3.15 0.176 BC/DT WP Complex Nutrients(cat#579,lot#P300-525) 1795 Total Kleldahl Nitrogen mg1L 30,2 32.0 24.2-38.4 Acceptable USGS 034174 2J412020 -0.494 31.1 1.85 Delores Trebotich 1910 Total phosphorus as P mglL 7.90 8.24 6.87-9.52 Acceptable SMd500-P E-2011 2011 2/112020 -0.707 8.18 0,393 Sierra Kortge WP Nitrite(cat#a88,lott#P300-770) 1840 Nitrite as N mg1L 2,36 2,30 1,97-2.64 Acceptable EPA..-_ 2.1 1003 1/2312020 0.400 2.31 0.120 6C 1 DT WP Nitrite(cat#8a8,lot#P300-770) 1840 NitriteasN m111- Z21 2.30 197-2.64 Aamiptable t itlwtoa ot►Zw► 1/23/2020 -0.655 2.31 6020 1 BeanCtlernago This report is scored by the criteria in the 2016 TNI Standard,Volume 3,instead of by the criteria in the 2009 TNI Standard to which the Proficiency Testing Provider is WIR accredited. This is a planned change and is endorsed by the TNI Proficiency Testing Program Executive Committee for transition to the 2016 TNI Standard, f& Lm-[-.4'O" 16341 Table Mountain Pkwy-Golden, CO 80403-800.372,0122-303.431.8454-fax 303.421.0159-www.eragc.com Study#:WP-300 WERA IMP-300 Final Evaluation Report A Waters Company Dan Arce EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District Report Issued: 03102120 1275 Meadow Crest Dr. Study Dates: 01113120-02127120 South Lake Tahoe, CA 96150 (530) 543-6231 TNI Reported Assigned Acceptance Performance Analysis Study Study Analyse Analyte Units Vaiue Value Limits Evaluation Method Description pate Z Score Mean Standarli Analyst Marne Code Deviation WP Nitrite(cat#888,lot#P300-770) 1840 NhriteasN mg& Z25 2.30 1-.Sr-2.8A Acceptable, ea4504Wa.2ar+201+ 1r23020 .0.521 1 2.31 1 0-120 1 %orrafcortge WP Demand(cat#578,lof#P300-516) 1530 BOD mglL 81.7 79.9 42.6.117 Acceptable smr,21011-201+2ll++ Ii2V2020 -0.0195 B1.9 12.8 Michal Lieberman 1555 CBOD M91L 72.4 33.2-112 Not Reported 75.6 13.8 1565 COD mg1L 130 102-154 Not Reported 130 9.53 2040 TOG M91L 51.4 42.8-59.5 Not Reported 52.1 3.33 WP Dissolved Oxygen(cat#21Z lot#P300-213) 1880 Oxygen,Dissalmd m9n 16.2 16.9 13.4-29.3 Acceptabla 0AM"clMIM11 1rAM20 -O.St35 16A 1.14 SieraKonp WP Turbidity(car#893,lot#P300-777) 2055 urbidity NTU 3.7 4.05 2.911-5.09 Acceptable EPA 180.1 2 1993 1i2a=20 .1.09 3.99 0.264 Sierra Korlge WP Total Residual Chlorine(cat#587,lot#P300-501) 1945 Free Residual Chlorine mg1L 0,64 0.621 0.469-0.770 Acceptable su45"CIDQM2011 112912020 0.380 0.617 0.0595 Michal Lieberman 1940 Total Residual Chlorine mg1L 0.64 0.628 CA75-0.778 Acceptable SM4500-0 43-20112011 112W2020 -0,295 0.652 1 0.0410 Michal Lieberman WP Total Residual Chlorine(eatp 587,loth P300-501) 1945 Free Residual Chlorine mg1L 6.6113 0.621 0.469-0.770 Acceptable am 460041 c-2a11 2011 1/20/2020 1.05 0.617 0.0595 Michal Lieberman 194D Total Residual Chlorine it lL 0.6BIF 0.628 0.475-0.7711 Acceptable SM 4500-Cl C-2011 2011 1129?2020 0.682 0.652 0.0410 Michal Lieberman WP Total Residual Chlorine(cat#587,lot#P300-501) 1945 Free Residual Chlorine r lL o.66 0.621 0.469-0.770 Acceptable sM4500- ic-m»2o11 1/29/2020 0.716 0,617 0.0595 Michal Lieberman 1940 Total Residual Chlorine mg& 0,66 1 0.628 1 0.475-0.778 Acceptable SM 4500-CI C-2011 2011 1129t2020 0.194 0.652 0.0410 Michal Lieberman This report is scored by the criteria in the 2016 TNI Standard,Volume 3,instead of by the criteria in the 2009 TNI Standard to which the Proficiency Testing Provider is accredited. This is a planned change and is endorsed by the TNI Proficiency Testing Program Executive Committee for transition Ilo the 2016 TNI Standard. oo.mnb 16341 Table Mountain Pill-Golden, CO 80403•800.372.0122•303.431.8454•fax 303.421.0159-www.eragc.com Study 4:WP-300 OERA A Waters Company Final Evaluation Report Study: WP-300 ERA Customer Number: S586001 Laboratory Name: South Tahoe Public Utilities District Microbiology Results C RfC 16341 Table Mountain Pkwy•Golden,CO 80403•800.372.0122•303.431.8454 •fax 303.421.0159•www.eraqc.com Stud # WP-300 q Y &) ERA VIlP-300 Final Evaluation Report A Waters Company Dan Arco EPA ID: CA00366 Lab director ERA Customer Number: S586001 South Tahoe Public Utilities District Report Issued: 03102120 1275 Meadow Crest Dr. Study Dates: 01113120 -02127/20 South Lake Tahoe,CA 96150 (530)543-6231 TNI A alyte Anslyte units Reported Assigned Acceptance performance Method Description Analysis Z Score Study StandaStudrd Analyst Name Code Value Value Limits Evaluation Date Mean Deviation W✓'WasteWatRM Conform MicrobETM(cat#576,lot#P300-083) 2500 Total Coliforms(MF) CFUf100mL 833 392-1050 Not Reported 641 109 2530 Fecal Coliforms(MF) CFUl100mL 54B 93.0-1040 Not Reported 312 159 2525 E.coli(10F) CFU1100mL 833 104-1700 Not Reported 421 266 2500 Total Coliforms(MPN) MPN1100mL 1120 780 489-2170 Acceptable CelilertFOQuanli-TrayCl 1/21/2020 0.0148 1030 280 MLIBG 2530 Fecal Colifofms(MPN) MPN1100mL 566 180-1430 Not Reported 508 209 2525 E.coli(MPN) MPN1100mL 1120 780 813-21550 Acceptable Colilerl® 1/21/2020 0.0109 1050 275 ML1BC ter Section 6A.3 a of the 2009 TNI Standard,"The assigned values for quantitative microbiology analytes shalt be equal to the mean of the assigned value verification andlor homogeneity testing per Sections 7.1 and 7.2". The final rcceptance limits are derived from the calculated study mean and study standard deviation from laboratory-reported results. Disagreement between the assigned values and study meansiacceptance limits are due to the inherent variability if microbiology methods and differences in the methods used by ERA and participant laboratories. For quantitative microbiclogy enalytes,the assigned value is not used in the evaluation of laboratories. This report is scored by the criteria in the 2016 TNI Standard,Volume 3,instead of by the criteria in the 2009 TNI Standard to which the Proficiency Testing Provider is accredited. This is a planned change and is endorsed by the TNI Proficiency Testing Program Executive Committee for transition to the 2016 TNI Standard. )� came _ o 16341 Table Mountain Pkwy•Golden, CO B0403 -800.372.0122.303.431.8454,fax 303.421.0159•www.aragc.com Study#:wP-300 CERTIFICUEEKCELLENCEOF In recognition of the quality of your laboratory in proficiency testing for WP-300 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 709 participating laboratories. This achievement is a demonstration of the superior quality of the laboratory in evaluation of the standards listed below. Complex Nutrients Demand Dissolved Oxygen Hardness Minerals Nitrite pH Settleable Solids Simple Nutrients Solids Concentrate Total Residual Chlorine Turbidity WasteWatRTI Coliform MicrobETI Matthew Seebeck Quality Officer S586001