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2018 Annual Report ®t,itcos For A Goch.hex if,Q .. 4 , l 1�u b c 1 ti I it District U y 1275 Meadow Crest Drive•South Lake Tahoe•CA 96150-7401 Rhone 530 544-6474•Fax 530 541-0614•www.stpud.us April 15, 2019 Patty Kouyoumdjian California Regional Water Quality Control Board - Lahontan Region 2501 Lake Tahoe Boulevard South Lake Tahoe, CA 96150 Subject: 2018 Annual Report Ms. Kouyoumdjian: Enclosed is the South Tahoe Public Utility District's annual self-monitoring report for the 2018 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 2018. Trend analyses on sample sites from pre-discharge to 2018 are included. Also included is our pretreatment program update. Please give me a call if you have any questions regarding this report. Res ectfully yours, Dan Arce Laboratory Director CC: Lahontan RWQCB - RB6-Lahontanwaterboards.ca.gov Lahontan RWQCB, Robert Tucker- RTucker(a�waterboards.ca.gov Alpine County Board of Supervisors -ttremayne(�alpinecountyca.gov Alpine County Health Department, Dr. Richard Johnson - riohnson(a�alpinecountyca.gov Alpine County Health Department, Dennis Lampson dlampsonalpinecountyca.gov Alpine County STPUD Contract Commission — Dr. Richard Harvey rharvey123gmail.com D:\AnnualReports\Lahontan Cover Letter-2019.doc WATER RECLAMATION PLANT ALPINE COUNTY 2018 ANNUAL REPORT SpUTH4041,167AHOf =,1414‘.`11. 14"4'w1p1/4 Se=n. .mom:. ` p`e� ivCe UTI'LI7Y• ��SZa\G� SOUTH TAHOE PUBLIC UTILITY DISTRICT 2018 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 2018 monthly results and yearly averages since 1980. There are multiple tables showing similar information. The averages computed in these tables may be different from one another due to the data averaged. Some tables compute the annual average from the monthly averages, while others compute the annual average from the entire data set. 2018 Annual Report 1. Compliance Record: No violations occurred during 2018 2. Wastewater Treatment Flow Information: Permits Item Flow a. Annual peak-day dry-weather influent flow (mgd) 4.59 b Annual peak-day wet-weather influent flow and associated storm data (mgd) 8.03 c. Maximum month influent flow (mgd) 4.13 d. Annual average influent flow (mgd) 3.55 1. Sewer connection permits issued but not currently used, 15,300 28 (gpd) e. 2. Capacity currently issued/reserved for public agencies 257,500 191 (gpd) 3. Projects issued "will-serve" letters or similar commitment 0 0 f. Estimated influent flow from facilities described in 2e. 272,800 Estimated remaining available wastewater treatment capacity 370/0 g. considering the influent flow estimated in 2f. (See note) Estimated influent flow parameters listed in 2a through 2d for the coming year • Annual peak-day dry-weather influent flow (mgd) 4.95 h. • Annual peak-day wet-weather influent flow and 8.81 associated storm data (mgd) • Maximum month'influent flow (mgd) 4.88 • Annual average influent flow (mgd) 3.52 Notes: Estimated remaining available wastewater treatment capacity is computed by subtracting annual peak-day dry-weather influent flow(2a)plus total flow from permits issued but not used(2f)fronwastewater 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 2019 estimated from linear regression analysis using corresponding flows from the last ten years(2009 through 2018). D:\AnnualReports\Section_C_Data-2018.doc • WASTEWATER FLOWS 2018 • Influent Effluent Month Total Max Min Ave Total Max Min Ave Jan 107.92 4.20 2.90 3.48 116.70 4.42 3.10 3.76 Feb 96.36 4.20 3.05 3.44 1 102.73 4.28 3.26 3.67 Mar 124.66 8.03 3.08 4.02 138.20 8.05 3.23 4.46 Arp 121.87 6.75 3.38 4.06 132.60 6.96 3.49 4.42 May 108.67 , 4.45 3.28 3.51 118.76 4.86 3.39 3.83, June 112.91 4.20 3.46 3.76 121.51 5.06 -3.16 4.05 July 128.15 4.59 3.79 4.13 136.93 5.35 3.58 4.42 Aug 113.16, 4.35 3.07 3.65 124.46 4.95 3.44 4.01 Sep 96.39 4.36 2.83 3.21 95.42 4.47 0.00 3.18 Oct 87.13 3.21 2.52 2.81 102.62 5.14 1.82 3.31 Nov 97.30 4.84 2.66 3.24 108.09 6.68 0.99 3.60 ' Dec 99.92 4.53 2.59 3.22 107.71 4.78 2.68 3.47 Total 1,294.44 1,405.73 ' Maximum 128.15 8.03 4.13 138.20 8.05 4.46 Minimum 87.13 2.52 2.81 95.42 0.00 3.18 _) Average 107.87 3.55 117.14 3.85 Note: Total flows in MG; Max, Min and Ave flows in MGD. . , l Maximum Flow Report 2018 Wet Weather Maximum Influent Flow: 03/22/2018 8.03 MG Dry Weather Maximum Influent Flow: 07/04/2018 4.59 MG Influent Precipitation Date Day MG Inch Type Comments Wet Weather 03/22/2018 Thu 8.03 2.86 Rain Maximum Wet Weather Flow 04/07/2018 Sat 6.75 0.74 Rain 03/23/2018 Fri 5.29 04/06/2018 Fri 5.15 0.65 Rain 03/21/2018 Wed 5.11 0.88 Rain 03/24/2018 Sat 5.11 0.12 Snow 03/31/2018 Sat 4.85 04/08/2018 Sun 4.81 . 03/25/2018 Sun 4.73 04/01/2018 Sun 4.65 Dry Weather 07/04/2018 Wed 4.59 Maximum Dry Weather Flow 07/05/2018 Thu 4.51 07/07/2018 Fri 4.48 07/06/2018 Sat 4.47 05/27/2018 Sun 4.45 07/28/2018 Mon 4.45 07/14/2018 Tue 4.42 0.47 r Rain 07/21/2018 Wed 4.37 09/02/2018 Thu 4.36 08/04/2018 Fri 4.35 C D:\AnnualReports\Max_Flow_Annual_Report-2018 PLANT LOADINGS for 2018 Change 2017 2018 Influent Flow, MG 1,600.71 1,294.44 -19.13 COD (mg/I) COD (lbs/yr) BOD (mg/I) 204 246 20.40 BOD (lbs/yr) 2,726,721 2,654,825 -2.64 SS (mg/1) 170 200 17.11 SS (lbs/yr) 2,275,049 2,154,628 -5.29 NH3-N (mg/I) 21.48 27.93 30.02 NH3-N (lbs/yr) 286,801 301,558 5.15 Total P (mg/1) 4.32 5.02 16.18 Total P (lbs/yr) 57,705 54,212 -6.05 1 RAW INFLUENT CHARACTERISTICS for 2018 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Yearly COD Max: Min: Ave: BOD Max: 324 295 278 202 221 286 285 294 288 310 293 303 324 Min: 202 215 175 146 188 225 238 206 200 192 213 234 146 Ave: 259 262 235 182 205 251 272 267 263 237 252 266 246 SS Max: 234 266 264 178 234 250 267 266 325 252 247 232 325 Min: 160 186 140 134 150 178 205 170 158 124 150 139 124 Ave: 200 212 186 154 177 210 234 226 224 184 197 191 200 NH3-N Max: 29.0 33.8 25.7 21.5 24.3 34.3 38.5 34.5 29.7 31.2 33.1 34.6 38.5 Min: 24.0 25.0 . 21.1 10.7 22.4 28.2 33.4 24.7 - 28.2 28.3 27.3 27.7 10.7 Ave: 26.1 28.3 24.2 18.2 23.3 30.4 34.8 31.2 29.3 29.5 29.8 30.1 27.9 Total P Max: 5.42 4.81 5.11 4.17 4.81 5.48 - 5.94 5.67 6.34 .5.41 5.58 5.38 6.34 Min: 4.59 4.81 4.10 3.87 4.47 4.55 5.44 5.15 4.77 4.74 5.00 5.16 3.87 Ave: 4.96 4.81 4.58 4.00 4.64 5.02 5.69 5.41 5.56 5.01 5.29 5.29 5.02 Note: Results expressed as mg/I RAW INFLUENT ANNUAL TRENDS 1 1 <-- FLOW---> Total Daily, COD BOD SS NH3-N NO3-N Total-P CI TDS Year MG MGD mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 1980 1,585.3 4.30 368 170 139 22.6 0.056 8.30 29.9 246 1981 1,467.4 4.00 397 161 148 22.8 0.053 8.37 27.6 245 1982 1,685.1 4.60 369 157 129 20.4 0.092 7.17 28.0 230 1983 1,612.9 i 4.42 344 153 126 18.4 0.096 6.71 28.2 231 1984 1,493.0 4.08 406 161 135 21.0 0.076 7.45 29.0 231 1985 1,464.8 4.01 412 ' 177 ' 143 21.3 0.069 7.82 30.8 245 1986 1,573.4 4.32 353 148 117 19.1 0.101 6.73 29.4 237 1987 1,551.2 4.25 388 165 132 21.0 1.497 6.99 31.1 252 1988 1,501.4 4.10 407 197 134 23.2 0.040 7.34 35.5 257 1989 1,652.3 4.52 430 174 134 20.8 0.135 6.80 38.0 243 1990 1,573.6 4.31 534 212 185 21.9 0.072 7.13 34.7 268 1991 1,401.1 3.83 418 182 158 21.1 0.219 7.00 39.5 , 260 1992 1,438.3 3.93, 428 193 162 21.2 0.165 6.93 37.3 265 1993 1,587.9 4.35 420 203 149 20.1 0.069 5.50 35.3 261 1994 1,464.6 4.01 434 205 172 19.9 0.065 5.76 39.2 265 1995 1;694.8 4.64 406 169 144 18.9 0.268 5.13 35.5 251 1996 1,787.4 4.88 • 381 169 139 17.4 0.202 -4.65 34.5 233 1997 1,766.1 4.84 389 162 144 18.2 0.144 4.67 34.9 238 1998 1,719.1 4.71 404 175 157 18.0 0.226 4.67 36.1 236 1999 1,774.2 4.86 397 173 154 18.6 0.410 4.63 35.8 . 237 2000 1,774.3 4.85 400 171 152 19.2 0.447 4.95 39.4 249 2001 1,586.0 4.34 440 191 174 19.5 0.786 5.40 42.1 263 2002 1,659.5 4.55 406 176 151 18.4 0.451 4.84 40.6 256 2003 1,552.9 4.25 ,426 187 156 20.2 0.266 5.32 41.6 256 2004 1,563.5 4.27 478 207 196 21.9 0.210 5.28 37.8 261 2005 1,602.1 4.39 434 192 164 20.4 0.132 4.82 35.8 , 251 2006 1,682.2 4.61 405 183 156 20.4 0.043 4.97 35.6 233 2007 1,471.3 4.03 463 200 170 21.6 0.169 5.24 34.6 / 250 2008 1,454.3 3.97 489 206 165 23.4 0.072 5.47 38.6 253 2009 1,416.0 3.88 492 220 176 23.8 0.028 5.44 37.7 250 2010 1,424.2 3.90 478 211 178 22.2 0.130 5.19 39.7 248 2011 1,526.8 4.18 395 188 168 19.8 0.350 4.28 37.9 240 2012 1,333.3 3.64 200 166 23.6 0.061 4.62 38.3 246 2013 1,275.0 3.49 230 194 25.1 ,0.053 5.14 36.5 247 2014 1,191.3 3.26 244 211 25.9 0.031 5.47 38.4 254 2015 1,110.9 3.04 265 215 28.1 0.027 5.65 40.7 267 2016 1,279.3 3.49 227 193 26.3 0.061 5.36 40.9 252 2017 1,600.7 4.40 207 171 21.4 0.102 4.32 45.3 250 , 2018 1,284.8 3.52 247 199 27.9 0.036 4.97 44.6 256 Maximum 1,787.4 4.88 534 265 215 28.1 1.497 8.37 45.3 268 Minimum 1,110.9 3.04 344 148 117 17.4 0.027 4.28 27.6 230 Average 1,527.8 4.18 418 191 160 21.4 0.193 5.81 36.3 249 ( #Years 39 39 32 39 39 39 39 39 39 39 RAW INFLUENT Influent Flows Raw Influent Annual Trends Annual Trends 8 -- ..- . . . _. - 2,400 600 7 _ 2,100 - 500 6 _ • 1,800 0 5 _ ` 1,500 400 C7 - J ; E 4 _ 1,200 300 f E a 3 _ 900 = • 200 2 - r 600 - _ 1 300 . 100 - 0 OT NM R IntO l�OD610 NC7 7 NfD f�mOfO TN f+1�lntDf�a0m0�N l7•Rjll7fO,f�a0 OvEl ii got, tOI�a0W0` N01VIf1(D 1�EDOTpp N l'�V In(Of�OD W O�Nf7 V In!O 1�m W O O O O O O O O W W W 07 W T.W O1 O 6I W 0 0 0 0 0 0 0 0 0 0 ap ap ap pp m O O O O O m W m W m 0 W 0 0 0 0 0 0 0 0 0 O O O mrnm lmrnrns,rnwrnrnrnrnmwrnrnmEo000000000 ,0o_O2 2,9 0, m m m rn rn m rn El rn rn§§rn i rn rn§�i rn rn o a o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N —A--Daily Ave MGD —"II—Yearly Total MG --lf—COD —f—BOD —A--SS Ammonia-Nitrogen _ Total Phosphorus Annual Trends Annual Trends 30 1 10 :-" . - - - - 25 - ./►. A 8 J Ak 'VI/YAN " 7 - -•---4A._ - i 20 _ v-- . 6 - . J J 4i 10 = 3 _ 1 5 2 1 � 0 r • ` • • ' ` • • • • rT r T ' � O N l'�R O fD A 1U O � ' IJ ' , ' ' Tl Tf ' � 4 0TNmiNm § iVln §gWO p0ppppWOO0NNO0NN OVmN m ON0C0§ O OONNmON OONO�N RAW INFLUENT Chlorides &TDS Chemical Oxygen Demand (COD) Annual Trends Annual Trends 100 400 __ 90 i ; 360 700 = 80 = 320 J 70 ` 280 600 - E 60 - c 240 , 500 - AIL 50 ` llilli _ 200 E .--! r.. m. vi a) 400 ..—: ""..'�` w i 2 40, 160 0 E U 30 , 120 300 r 20 ` 80 200 10 ,40 100 o - - o O pip pNp C�X77 ti f��p`�CpOJWWfpO�'p��f N`cpn�f pOH ti(DJf�f apO�'pO��Op.p-pN fp7�pa rN fp0 1p�m pO O�N l0�!n(O 1�m 8 8 8 8 8 8 8 01 61 8§01 g g g tii'A ri Q)8 8 8 8 8 8 8 8 8$$0 0 0 0 0 0 0 0 0 - 0 - N N N N N N N N N N N N N N N N N O• •N•('I7Of0T n0 OTOr •N M Vln`(O'f�CO 6ITO N f7 R O f0^0 O O F N M•f O 0 f`0 aD a0 OD a0 0 0 0 0 0 0 W m 61 W O Q1 01 D)O 67 0 0 0 0 0 0 0 0 0 0 a1 a)O d)6I 6I 61 O 61 6)07 D)07 07 d)Q1 D)W W 01 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 N N N N N N N N N N N N N N N N N N N —t—Chlorides —+—TDS Linear(Chlorides) Linear(TDS) Biochemical Oxygen Demand (BOD) Suspended Solids (SS) Annual Trends Annual Trends 400 300 - 350 - - 250 - 300 _ 250 200 -2 A, _ Allinwily 4111 if 1 4 200 �� ,, !-.6.rl/ 150 w 150 Iir = 100 - 100 - 50 50 1 _ _ _ 0 O N l`7 0 n 0 61 O N M R l0 f0 f�OD m O N m<O t0 f�0 O O N f7 R!n 0 0 O •OT •N c�I V�In(O^0•Q)OTm•NJI�V N t0 r 0 61 Op p pN dpl pR Ipn(pO fpm pW 0p1 O N l9 V In(O f�m 21 m m OOi 0;31'in 007 in in in it g 001 in 001 it iT iT O O O O O i7 0 0 1 0 0 0 0 0 0 0 0 0 0 8 8 8 8 8 8 8 8 8 8 8§7 8 8 8 8 8 8 8 8 8 8 8 i3 8$i3r $$0 0 0 0 0 0 0 0 0 N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N BIOCHEMICAL OXYGEN DEMAND UNIT PROCESS PERFORMANCE 2018 Removal Month Raw Primary Sec Final % January 259 187 16.3 7.91 97 February 262 178 18.0 7.67 97 March. 235 153 35.8 18.60 92 April 182 108 15.2 5.54 97 May 205 119 16.6 7.16 97 June 251 157 17.7 7.76 97 July 272 227 65.8 7.75 97 August 267 190 43.0 15.46 94 September 263 157 38.0 19.70 93 October 242 180 49.7 5.76 98 November 252 146 20.2 7.86 97 December 266 157 27.4 10.49 96 12 Month Ave 246 163 30.3 10.14 96 % Removal 34 81 67 96 Biochemical Oxygen Demand Percent Removal 100 /c7=7N,7A A 90 80 0 E 70 c" 0 60 50 1 I I • Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec --i---Final Effluent Linear(Final Effluent) SUSPENDED SOLIDS UNIT PROCESS PERFORMANCE 2018 Removal Month Raw Primary Sec Final January 200 128.6 12.7 3.48 98 February 212 121.4 13.5 4.02 98 March 186 104.3 32.8 12.05 94 April 154 78.4 11.8 3.48 98 May 177 76.2 13.0 5.89 97 June 210 77.1 8.6 2.58 99 July 234 99.3 10.7 3.79 98 August 226 135.3 25.0 6.06 97 September 224 111.8 39.8 8.73 96 October 206 97.3 12.0 2.65 99 November 197 64.5 9.5 2.15 99 December 191 69.9 15.5 3.16 98 12 Month Ave 201 97.0 17.1 4.84 98 % Removal 52 82 72 98 Suspended Solids Percent Removal 100 90 > 80 0 14. E 70 60 50 r T r Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec -�-Final Effluent Linear(Final Effluent) FINAL EFFLUENT ANNUAL TRENDS <---FLOW---> Total Total Daily COD BOD SS NH3-N NO3-N TKN Total-P CI TDS Turbidity CI, Coliforms Year MG MGD mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L NTU mg/L Total Fecal/E.coli pH 80 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 81 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 82 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 83 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 84 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 85 1,532.40 4.24 20.0 2.0 3.0 4.5 5.15 0.17 92 395 1.1 4.9 _ 7.59 86 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 87 1,657.20 4.81 19.0 2.0 4.0 7.7 4.83 0.23 117 452 1.4 3.9 7.25 88 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 89 1,769.70 \4.89 40.0 6.0 5.0 13.9 4.93 15.6 3.80 76 326 2.5 13.6 2.9 2.0 7.10 90 1,697.30 4.76 37.0 6.0 4.0 8.4 8.39 10.1 3.80 83 387 2.3 14.6 2.0 2.0 7.30 91 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 92 1,608.40 4.39 41.0 7.0 4.0 9.6 6.46 11.2 5.05 64 289 3.1 4.4 - 3.7 2.1 7.32 93 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 94 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 95 1,925.70 5.27 39.4 7.4 5.0 20.5 0.03 21.1 2.69 51 236 2.6 4.4 2.2 2.0 7.46 96 1,965.80 5.37 37.3 7.0 4.4 18.6 0.13 20.6 2.50 44 221 2.5 4.0 .2.1 2.0 7.64 97 1,872.30 5.12 37.0 6.9 3.7 19.3 0.25 20.7 2.59 50 226 2.8 6.1 2.1 2.0 7.62 98 1,693.40 4.64 35.6 6.9 4.0 18.6 0.28 21.1 2.56 48 227 2.6 4.6 2.1 2.0 7.53 99 1,742.20 4.78 34.8 6.5 3.1 19.3 0.16 19.8 2.65 49 220 2.4 4.2 2.8 2.0 7.49 00 1,685.90 4.74 42.4 7.9 3.9 - 20.7 0.04 20.9 2.55 53 226 2.8 4.5 2.1 2.0 7.49 01 1,565.40 4.29 46.9 8.7 5.1 19.1 0.54 21.6 2.87 58 241 4.5 5.2 2.0 2.0 7.43 02 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 03 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 04 1-,483.30 4.05 47.4 7.9 3.8 23.1 0.04 26.3 3.19 56 242 4.8 6.0 2.1 2.0 . 7.47 05 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 06 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 07 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 08 1,343.14 3.67 40.5 6.0 2.9 20.2 1.60 21.5 3.61 54 255 4.1 5.3 2.0 2.0 7.64 09 1,455.20 3.98 45.7 8.6 3.1 21.9 1.02 22.8 3.66 50 250 4.5 6.1 2.2 1.9 7.61 10 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 11 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 - 12 1,445.96 3.95 9.0 2.7 22.4 0.79 26.1 2.88 49 242 3.4 5.4 6.4 6.2 7.71 13 1,409.31 3.86 6.5 2.7 24.4 0.53 27.8 3.13 49 250 3.6 6.4 2.0 1.8 7.70 14 1,329.45 3.65 7.9 2.2 25.8 0.57 29.1 3.32 52 253 3.4 5.6 2.1 1.8 7.65 15 1,247.60 3.42 6.3 2.7 25.2 1.34 28.5 3.63 52 263 4.0 6.1 254.2 48.4 7.47 16 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 17 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 18 _ 1,395.06 3.83 10.0 4.9 28.3 0.21 31.1 3.38 57 268 4.3 7.3 1.1 1.0 7.84 Permit Max 300 45 60 20 240' Permit Ave 60 30 30 10_ 232 Maximum 1,965.80 5.37 51.0 10.0 5.1 28.3 13.47 31.1 5.05 148 551 4.8 14.6 254.2 48.4 7.86 Minimum 1,247.60 3.42 14.0 2.0 1.0 1.0 0.03 7.8 0.12 44 220 0.7 0.7 1.0 1.0 7.10 Average 1,587.18 4.39 35.6 6.1 3.4 16.3 3.02 22.2 2.56 67 299 2.9 5.6 10.7 3.6 7:54 #Years 39 39 32 39 39 39 39 30 39 39 39 - 39 39 30 30 39 FINAL EFFLUENT • Effluent Flows Chemical Oxygen Demand Annual Trends Annual Trends 10 3,000 9 _ 2,700 8 _ - 2,400 50 7 _ j 2,100 _ 0 6 _ 1,800 40 2 5 _ 1,500 J _ 4 1,200 30 3 _ 900 • 2 _ 600 20 1 _ 300 _ 10 p 0 _ _ 808182830485868788899091929394959697989900010203040506070809101112131415161718 p r , tr 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 1213 14 15 1617 18 -rte Daily Ave MGD -f-Yearly Total MG Biochemical Oxygen Demand Suspended Solids Annual Trends Annual Trends 30.0 30.0 - - - - .. - 25.025.0 _ _ 20.0 . I 20.0 J _ J _ - Eh 15.0 s a) 15.0 E _ 10.0 1 10.0 I 5.0 ; 5.0 l 0.0 „ - „ rT , r , , , , . , , . . , . , r i 0.0 , , - , , - - . , r . , ., - 808182838485868788899091929394959697989900010203040506070809101112131415161718 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 FINAL EFFLUENT Ammonia-Nitrogen Total Phosphorus Annual Trends Annual Trends 30 10 9 - 25 $ - 20 7 6 e) 15 a) 5 E E = 4 - 10 3 5 2 = 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 0607 08 09 10 11 12 13 14 15 16 17 18 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 Nitate-Nitrogen Chlorides &TDS Annual Trends Annual Trends 20 350— -700 c 300 600 15 250 500 E 200 400 rn N E J as 10 �' • 150 300 U 100 200 5 50 100 80 8182 83 84 85 86 8788899091 9293949596979899000102 03 04 05 06 07 08 091011 12131415161718 0 • , , , , , , , , , , , , , , , , 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 ---A-Chlorides -f-TDS FINAL EFFLUENT Turbidity Total Chlorine Annual Trends Annual Trends 20 - - 20 15 15 10 'a 10 z E 5 5 0 r , r 0 - f 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 pH Annual Trends 11 -- 10 9 8 2 7 - - 6 5y 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 08 V> Z> V> OZ> V t7> 0£> 09 T'0> 000T 8TOZ/8Z/I T 081 17> Z> 17> OZ> V> 1b ZT Z9 V0> 00S LTOZ/ST/80 OLT 17> Z> 17> OZ> V t7> Z1 8S T'0> 008 910Z/I0/TI OTT Z> T Z> 01> Z> Z> Z1 SZ Z'0 OL9 SIOZ/OI/II O1I £ 1> Z> 01> Z> £ LT SV 1'0> 0£9 tIOZ/II/II OTT • Z t7> Z> 01> Z> Z ZT Z17 1'0> 009 £T0Z/SZ/II 0ZT £ 1> Z> 01> Z> £ TT OS Z'0> 09L ZIOZ/£I/II OST 17017 1> 1> S> L61 S> 9'£I LS Z'0> OLZ1 IOZ/L0/L0 • L'Z8 Z> T> Z> 01> S'Z> Z> 8 6'L£ Z'0> 91L IIOZ/90/bb0 OTT Z 1> Z> 01> Z> 2 ZZ 817 5'0 089 0I0Z/ZZ/T T 0£T £'£ 1> 1> . 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Z> ST'? 08 8'ZS 8'0T 176'£ 9'S1 OTOZ/TZ/TO -1/sn -I/sn 1/fin i/8n -1/8n i/8n i/8n i/en -/Ow -Ow 1/Ow 1/8w a3 133 2v ail es sd Id EN >I 2W ep luan1JJ3I ulH laodaH sinew ienuuv • South Tahoe PUD Biosolids Cake Metals Results reported as dry weight Moisture As Be Cd Cr Cu Pb Hg Mo Ni Se Ag- Zn Site Date ID# % mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg Cake 02/03/14 AG39474 29.0% 2 < - 1 < 1 6 114 4 0.55 7 4 < 7 < 1 317 Cake 05/12/14 AG40792 27.0% 2 < 1 < 1 7 122 4 0.41 5 5 < 7 < 1 315 Cake 08/13/14 AG42401 28.0% 3 < 1 1 7 154 8 0.29 9 4 < 7 1 429 Cake 11/11/14 AG43808 28.0% 3 < 1 1 7 125 4 0.29 7 5 < 7 < 1 346 Cake 02/23/15 AG45177 46.0% 2 < 1 < 1 5 117 3 0.33 6 4 < 5 < 1 326 Cake 05/19/15 AG46276 36.0% 4 < 1 < 1 7 156 5 0.56 7 4 < 6 < 1 431 Cake 08/03/15 AG47322 45.0% 2 < 1 < 1 4 127 4 0.24_ 6 3 < 7 < 1 400 Cake 11/10/15 AG48725 28.0% 3 < 1 < 1 3 114 4 0.29 6 4 < 5 < 1 329 Cake 02/02/16 AG49699 28.0% 4 < 1 < 1 7 129 4 0.21 6 5 < 5 1 318 Cake 05/03/16 AG50811 33.0% 3 < 1 < 1 7 88 4 0.18 5 4 < 6 < 1 276 Cake 08/08/16 AG52307 28.0% 3 < 1 < 1 6 125 4 0.18 6 4 < 5 < 1 464 Cake 11/01/16 AG53555 26.0% 4 < 1 < 1 8 123 4 < 0.03 8 4 < 6 < 1 385 Cake 02/13/17 AG54852 25.0% 3 < 1 < 1 8 112 7 0.16 5 6 _< 5 6 280 Cake`- 05/22/17 AG56207 15.0% 3 < 1 < 1 6 107 6 0.33- 6 5 < 5 < 1 293 Cake 08/15/17 AG57585 26.0% 3 < 1 < 1 6 138 3 0.23 7 5 < 5 < 1 538 Cake 11/14/17 AG58968 28.0% 5 < 0.5 1 6 293 5 0.36 10 5 2 2 1000 Cake 02/21/18 AG60195 25.0% 2 < 1 < 1 6 112 3 0.17 6 4 < 5 < 1 312 Cake 06/13/18 AG61825 27.0% 3 < 1 < 1 5 170 - 3 0.20 10 3 < 5 1 444 Cake '09/19/18 AG63367 28.0% 4 < 1 2 8 189 4 0.25 12 5 < 5 2 500 Cake 11/28/18 AG64325 34.0% 4 < 1 1 9 141 4 - 0.24 11 5 < 5 1 353 Maximum 46.0% 5 4 4 19 307 _ 29 2.50 19 19 9 19 1000 Minimum 15.0% 2 0 1 1 88 3 0.03 3 3 2 1 276 Average 27.9% 3 1 1 7 175 7 0.51 8 5 6 3 408 #Tests 60 60 60 60 60 60 60 60 60 60 60 60 60 Percent As Be Cd Cr Cu Pb Hg Mo Ni Se Ag Zn >0 >0 >0 >0 >0 >0 >0 >0 >0 >0 >0 >0 >0 South Tahoe PUD Biosolids Cake Metals Results reported as wet weight Solids As Be Cd Cr Cu Pb Hg Mo Ni Se Ag Zn Site Date ID# % mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg Cake 02/03/14 AG39474 29.0% 0.7 < 0.3 < 0.3 1.8 33 1.1 0.16 , 1.9 1.3 < 2.0 < 0.3 92 Cake 05/12/14 AG40792 27.0% 0.6 < 0.3 < 0.3 1.8 33 1.0 0.11 1.3 1.4 < 2.0 < 0.3 85 Cake 08/13/14 AG42401 28.0% 0.9 < 0.3 0.3 1.9 43 2.1 0.08 2.5 1.2 < 2.0 0.4 120 Cake 11/11/14 AG43808 28.0% 0.9 < 0.3 0.4 1.9 35 1.2 0.08 2.0 1.3 < 2.0 < 0.3 97 Cake 02/23/15 AG45177 46.0% 1.0 < 0.5 < 0.5 2.5 54 1.5 0.15 2.6 1.7 < 2.5 < 0.5 150 Cake 05/19/15 AG46276 36.0% • 1.4 < 0.4 < 0.4 2.4 56 1.9 0.20 2.4 1.6 < 2.0 < 0.4 155 Cake 08/03/15 AG47322 45.0% 1.1 < 0.5 < 0.5 1.7 57 1.7 0.11 2.6 1.4 < 3.0 < 0.5 180 Cake 11/10/15 AG48725 28.0% 0:9 < 0.3 < 0.3 0.9 32 1.0 0.08 1.6 1.0 < 1.5 < 0.3 92 Cake 02/02/16 AG49699 28.0% 1.0 < 0.3 < 0.3 2.0 36 1.0 0.06 1.8 1.3 < 1.5 0.3 89 Cake 05/03/16 AG50811 33.0% 1.0 < 0.3 < 0.3 2.3 29 1.3 0.06 1.6 1.3 < 2.0 < 0.3 91 Cake 08/08/16 AG52307 28.0% 0.9 < 0.3 < 0.3 1.6 - 35 1.1 0.05 1.8 1.0 < 1.4 < 0.3 130 Cake 11/01/16 AG53555 26.0% 1.0 < 0.3 < 0.3 2.0 32 1.0 < 0.008 2.0 1.0 < 1.5 < 0.3 100 Cake 02/13/17 AG54852 25.0% 0.8 < 0.2 < 0.2 1.9 28 1.8 0.04 1.3 1.5 < 1.2 1.4 70 Cake 05/22/17 AG56207 15.0% 0.4 < 0.2 < 0.2 0.9 16 0.9 0.05 0.9 0.7 < 0.8 < 0.2 44 Cake 08/15/17 AG57585 26.0% 0.8 < 0.3 < 0.3 1.6 36 0.9 0.06 1.7 1.4 < 1.3 < 0.3 140 Cake 11/14/17 AG58968 28.0% 1.3 < 0.1 0.2 1.8 82 1.3 0.10 2.8 1.3 0.5 0.5 280 Cake 02/21/18 AG60195 25.0% 0.6 < 0.3 < 0.3 1.6 28 0.7 0.04 1.4 1.0 < 1.2 < 0.3 78 Cake 06/13/18 AG61825 27.0% 0.8 < 0.3 < 0.3 1.4 46 0.9 0.05 2.6 0.9 < 1.3 0.4 120 Cake 09/19/18 AG63367 28.0% 1.1 < 0.3 0.6 2.2 53 1.1 0.07 3.4 1.4 < 1.4 0.6 140 Cake 11/28/18 AG64325 34.0% 1.4 < 0.3 0.3 3.1 48 1.4 0.08 . 3.7 1.7 < 1.7 0.3 120 Maximum 46.0% 1.4 1.0 1.0 5.0 82 8.9 0.50 5.6 5.0 3.0 3.9 280 Minimum 15.0% 0.4 0.1 0.2 0.2 16 0.7 0.01 0.6 0.7 0.5 0.2 44 Average 27.9% 0.9 0.3 0.3 2.0 48 2.0 0.14 2.2 1.5 1.7 0.7 113 #Tests 60 60 60 60 60 60 60 60 60 60 60 60 60 SOUTH TAHOE PUBLIC UTILITY DISTRICT WASTEWATER TREATMENT PLANT COMPLIANCE RECORD Number of Number Chemical of Compliance Year Tests Violations % Comments 1980 2,196 40 98.2 1981 1,946 27 98.6 1982 1,951 72 96.3 1983 1,983 17 99.1 1984 2,480 61 97.5 \ 1985 2,811 9 99.7 1986 3,146 69 97.8 1987 3,018 42 98.6 1988 3,323 9 99.7 1989 2,432 14 99.4 1990 2,098 0 100.0 1991 2,068 1 99.95 pH 1992 2,168 0 100.0 1993 2,163 2 99.91 COD,Set Solids 1994 2,152 0 100.0 1995 2,047 1 99.95 Settleable Solids 5/6/95=0.3 1996 2,064 0 100.0 1997 2,138 0 100.0 1998 2,149 0 100.0 1999 2,201 0 100.0 2000 2,110 0 100.0 2001 2,153 0 100.0 , 2002 2,137 0 100.0 2003 2,159 0 100.0 2004 2,078 0 100.0 2005 2,069 0 100.0 2006 2,191 0 100.0 2007 2,172 0 100.0 2008 2,159 0 100.0 2009 2,160 0 100.0 2010 2,161 0 100.0 2011 2,093 0 100.0 Stopped COD tests 06/2011 2012 2,063 0 100.0 2013 2,050 0 100.0 2014 2,054 0 100.0 2015 2,052 0 100.0 2016 2,042 0 100.0 Total Coliform by Qua nti-Tray 2017 2,020 0 100.0 2018 2,032 0 100.0 # Violations 0 20 40 60 80 100 . .:.,.,.:k> .., ., ,:.,:i. ;� T.:.:;1,,,1,. ,.:�.:: ;:1,::: ., I f 1 f T I 1 f T I 1 T 11 f 1 1 f 1 1 f ' akka.;ef£�:r:•.�;`;'.\,'z}�,>,i�z�'tk;�:#r¢#<kzkza:7..k:a,;;g�c.<�"�zr':gk x;Rt�?>;>:a.}:.,:'��,''`��3'€%.'4as4•`oY#>' 086 ':a�•;a3ii::t ><;.3ac€::z;z<g:„:zzz:,;o�:�z,.i:,<.<•.ua#:?$>�3gz.'ak'ai:0 3<'i:':k<, k>:#aY;3#,z€z4 ,r\}z °'`Xi'k`”80,k9 t•§@ ii y o- �:`„a:,•.;.AS;`:y,:, 1.861.I; Z¢2;;E3`,z�,>,k w`z2kzk a� y�';3s>e • ,r...o.ax.,:.:;;e.,..:.,.:..:.a:;.,;.....;�;;;�:;�•o.»e.,;.:.:.....:....;.,;...:..,..�,;;.....;:...;:a:a�.„a�a•;,;;.:. •:.a;,:;:, ;<a,v.:..�:r;a:;::•<;:c.nw •.Ra.?a�„c,#s>¢•�#,. 4, ,.k@k,...kc ^a::�#..,>r��x,,.�,..:.z�`a.,�:.a��.o`##z>;`c'.za#':;s{kzx::•'?1#:`,:3�:;a:::kt'..: �£3:�,;;,,:;. ,?,.�r•,.,.::,>:: ':s;':a” •::>,�;# #,,,:3'..v.ze. ,•:i>..xis.,.v$.:>,akaJo>.,yk:. .,.�,Xo,.a ,G,.>,�k,i,..,. ,o.x\,,.�,».r.s:...:7`,.. »z3....:.W z>... .n;Y:1.:i�,k;,,r.\.,, o-I +:.�`...z3:€�>,a;.v,�r•.,.:a s,.x.£<;;�•.�,zt;�<..<., ,.^�>. •'•z;.::,�..\..k:,.,..�,,..,..�.,, .g, .,j`�k g.,.;k...r3',:;;<>;�.„��...�.:��..;�,,.,..;�s:�.<»•:¢:>,...,,:<. Z86� ;<r.;h.,,�. ..,..;.<�x<,;za.,'�s.,t`,��:�.�•<:%��a�%:,#;:,.....,,.k:><;�;°;;�.�,s...,�.,. ..�a.,:?n,:.a.:gs•�Z::.Fr';£c,�,.,..�:,.',\�.�.m.,:\,,..,�y.,.,+.;3',<....,.,.,X,,.;.;�3...:............ ` 0861. L >t,: k,>< VII ,.:k;.. r¢;, v s.,.k•. oc.¢k ».ac�;<;:,,;;E'.<$:`Y>?o:.'.:,:<•;,::if'..>,aG##3 '8:#S.�:<,sEtr•;#�'�'i##:.•vkd#rSa## >c""��..+;:?'�'^.Rkgk:s,;?.z#k x':r'F;,.o;••.k,3.c>r3:•? >,,'a.C?•'b..,,f.,;:xo:J.., ::'�:zA<;,'.wrv':<>:c•"s',>,..Ua ..r ?•...`3...,}..: )a"`;^„<,<€.,.�, x\,;�.,e;.Y•:..<<.>a:E,n.�.�<:x*.�o.:;vko�Y.�<:A`v4i<z,��a,,z�z.£,;k.z.k•.s„#;.<.k.rk:a.�;>kxk,,:;z'a?;f:,.,,£,,+.�xk:k:?vaC"E3�ia::#s;�;�e'•�*za. 9861. MUM — 1 ' 9961. aERU.. x? •�\ ai:$o:\.Q",':•aJ�;ki:xoa r> :.:%.a \ F � d s L861.yz £, I3uS¢ u 2261. a zx,#A ,€..£; . 6861, INVENVERNMI 0661. 6661,) Z661, v .17666 9666 W 9661. L661. (12 8666 CD 6661. 0002 600Z Q . ZOOZ EOO7 t700Z (� 9002 9002 N LOOZ 800Z • 6002 7 0602 7-� 6602 7.J • Z1.OZ 7 C1.0Z 7 17602 91.0Z 91.02 L60Z • 91,0Z PRETREATMENT PROGRAM UPDATE PRETREATMENT ANNUAL REPORT COVER SHEET NPDES Permit Holder of Sewer Authority Name: South Tahoe Public Utility District Report Date: April 15, 2019 Period Covered by this Report: January 1, 2018 to December 31, 2018 Name of Wastewater Treatment Plant NPDES Permit Number South Tahoe Public Utility District Board Order No: R6T-2004-0010 WDIS No. 6A095900700 Person to contact concerning information contained in this report: Name: Jeff Lee Title: Plant Operations Manager Mailing Address 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Telephone No: (530) 544-6474 I 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. fq c4. /Date Signature of Official Plant Operations Manager Title ANNUAL PRETREATMENT REPORT 2018 Section 1 —Results of Wastewater Treatment Plant Sampling and Analysis The wastewater treatment pant influent, effluent and sludge were sampled November 28, 2018 for pollutants EPA has identified under Section 307(a) of the Clean Water Acton. The 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. Two (2) establishments were deleted because they were found to be no longer in business. Field verification and plan reviews have identified two (2) new businesses, which are included on the table. Section 5—Annual Industrial User Site Inspection Summary There were approximately 148 on-site inspections conducted during 2018. 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 14 correction notices. Primarily, correction notices were issued for violations regarding grease trap/interceptor routine cleaning or other necessary repair work. Each correction notice issued was followed up by a re-inspection to ensure that the violation was corrected. All violations resulted in appropriate corrective action to remedy the violation. Section 7—Pretreatment Program Changes No changes to the program occurred during this report period. Section 8—Annual Pretreatment Budget Summary The cost of operating the pretreatment program for the period covered in this report was approximately $15,000.00. The funding comes from the general operating fund. 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. ,1 INDUSTRIAL USER LIST UPDATE 2018 Table 4-A GREASE TRAP/INTERCEPTOR&SAND/OIL INTERCEPTORS ... ...............:... .............................................. .::..:.:...::....:...:...:...:..:..:......:....:...:...:...:...::....................:..:........... C. } Blue Granite Climbing GYM 1259 Emerald Bay Rd. California Hockey Academy 2478 Old Meyers Grade 'tC " `;." Freel Perk&El Fresca 3141 Emerald Bay Rd. Freel Perk&Verde Holiday Market 2977 HWY 50 / Lira's Market Emerald Bay Bar&Grill 888 Emerald Bay Rd. Brother's Place ,Q. Rainbow Sprinkles Donuts 1036 Emerald Bay Rd. Tahoe Moonshine 1611 Shop Street :.:..::...:. How many traps/interceptors on your route? 67 How many total inspections were done? • 148 How many correction notices were written? 14 SOUTH TAHOE PUBLIC UTILITY DISTRICT MEMORANDUM From The Lab Date: April 12, 2019 To: Jeff Lee, Manager of Wastewater Operations Cuz Cullen, Inspection Supervisor' From: Dan Arce, Laboratory Director Topic: EPA Priority Pollutants Samples were obtained from the Raw Influent, Final Effluent and Centrifuge Cake on November 28, 2018 and analyzed for metals and organic chemicals. Raw Influent and Final Effluent were 24-hour composites, with the exception the Raw and Final 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 The Final Effluent had all total metal results below the drinking water Primary Maximum Contaminant Levels (MCL). The 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 and Selenium were above the STLC but below 10 x STLC. The State allows results from the total metals tests to be compared with (10 x STLC) to determine whether there is risk of the leachate from the solid material being hazardous. If the total metals results are < (10 x STLC), the leachate is considered safe. If the total metals results are > (10 x STLC), a WET extraction of the solid material is performed and compared against the STLC. April 12, 2019 Page 2 Metal Concentrations Sample date: November 28, 2018 Drinking Raw Final Water Compound Units Influent PQL Effluent PQL MCL Aluminum pg/L 200 100 ND 50 1,000 Antimony pg/L ND 4 ND 2 6 Arsenic pg/L 4 4 ND 2 10 Barium pg/L 20 20 ND 10 1,000 Beryllium pg/L ' ND 4 ND 2 4 Cadmium _ pg/L ND 4 ND 2 5 Calcium mg/L 20 1 19 0.5 Chromium mg/L 4 4 ND 2 50 Cobalt pg/L ND 4 ND 2 Copper pg/L . 31 4 10 2 1,000 Iron pg/L 1000 100 230 50 ' 300 Lead pg/L 4 4 ND 2 15 Magnesium mg/L 4 1. 4.5 0.5 Manganese pg/L 60 4 42 2 50 Mercury pg/L ND 0.1 ND 0.1 2 Molybdenum pg/L ND ,3 ND 2 Nickel pg/L. ND 4 ND 2 100. Potassium mg/L 12 1 12 0.5 Selenium pg/L ND 20 ND 10 50 Silver pg/L ND. 4 ND 2 100 Sodium mg/L 39 1 52 0.5 Thallium pg/L , ND 2 ND 1 2 Vanadium pg/L ND 4 ND 2 Zinc pg/L 80 40 ND 20 5,000 Notes:The sample for metals is a 24-hour flow-proportioned composite. D:\Lahontan\Priority Pollutants\Organics 2018.doc April 12, 2019 Page 3 Centrifuge Cake Metals Sample Date: November 28, 2018 Centrifuge Cake Date: 11/28/20'1.8_ -- - . ID: AG643255.�_r- i : :.__. [ Weight- STLC ; Result. 10xSTLC TTLC > , mg/Kg -- mg/Kg_-i . mg/Kg mg/Kg >STLC 10xSTLC >TTLC Antimony 15 - - i, - :0:34 150 500 no no no Arsenic 5 -: - -- 1.4: 50 50 no no no Barium 100 : -- 27- 1,000 10,000 no no no Beryllium 0.75. < .', -- 0`.34,-, 7.5 75 no no no Cadmium 1 r .10.34 10 100 no no no Chromium 5 = .31. 50 2,500 no no no Cobalt 80 --- -01.34- 800 8,000 no no no Copper 25 • -' -' -':-48 250 2,500 YES no no Lead 5 ', _ _ --1..4-- 50 1,000 no no no Mercury0.2 I' -0.08, 1 2 20 no no no • Molybdenum 350 - -',. _. 3.7: 3,500 3,500 , no, no no Nickel 20 - -1':7 i 200 2,000 no no no Selenium , 1 < 1 -. 1.7.: 10 100 YES no no Silver 5 - - - 0..34 50 500 no no no Thallium 7 < - .- 0::1:7'-- 70 700 no no no Vanadium 24 -- - - --4..1 j 240 2,400 no no no Zinc 250 i : ;1:20'' 2,500 5,000 no no no D:\Lahontan\Priority Pollutants\Organics 2018.doc April 12, 2019 Page 4 2. Organic Analyses Volatile Organic Chemicals(VOCs), Semi volatile Organic Compounds', Chlorinated Pesticides and Chlorinated Herbicides were tested in the Raw Influent, Final Effluent and Centrifuge Cake. The detected compounds are tabulated below. Organic Compounds Test Results Detections November 28, 2018 Raw Final Centrifuge Influent Effluent Cake Compound pg/L pg/L pg/Kg Acetone 110 ND 97,300 Benzoic Acid 719 5 ND Benzylalcohol 20.7 ND ND 2-Butanone (MEK) ND ND 59,000 Chloroform 3 2 ND 3 and 4-Methylphenol 58.2 ND 10 Phenol 33.4 ND ND Toluene 5.4 ND 1,190 ND: Not Detected I D:\Lahontan\Priority Pollutants\Organics 2018.doc Silver State Labs-Reno January 11, 2019 S1135 Financial Blvd x, X: Wor or er 181 340 way tAnalytical Laboratories Reno,NV 89502 , X Sierra EnvironmentalMonitoring (775)857-2400 FAX:(888)398-7002 www.ssalabs.com Dan Arce SOUTH TAHOE PUBLIC UTILITY DISTRICT 1275 Meadow Crest Drive South Lake Tahoe,CA 96150 Project: EPA Priority Pollutants/Inf Eff Cent Cake Dear Dan Arce: It is the policy of Silver State Analytical Laboratory-Reno to strictly adhere to a comprehensive Quality Assurance Plan that ensures thedata presented in this report are both accurate and precise. Silver State Analytical Laboratory-Reno maintains accreditation in the State of Nevada(NV-00015)and the State of California(ELAP 2990). The data presented in this report was obtained from the analysis of samples received under a chain of custody.Unless otherwise noted below,samples were received in good condition,properly preserved and within the hold time for the requested analyses.Any anomalies associated with the analysis of the samples have been flagged with an appropriate explanation in the Analysis Report section of the Laboratory Report. • Revised Report:Added Mn to-02. Sincerely, CA1114 Carly Wood Laboratory Director 1135 Financial Blvd Reno,NV 89502 Revision vl Page 1 of 16 SirSfate ' ° ver State •� �YAnalytical Report t �. , Financial Blvd 113 • f}. : .. x, Reno,NV 89502 �e : Analytical Laboratories Workorder#: 18111340 • w:Sierra Environmental. ;1VIonitoring (775)857-2400 FAX:(888)398-7002 www.ssalabs.com Date Reported: 1/11/2019 Client: SOUTH TAHOE PUBLIC UTILITY DISTRICT Sampled By: Auto Sampler/ Project Name: EPA Priority Pollutants/Inf Eff Cent Cake PO#: Laboratory Accreditation Number: NV015/CA2990 Laboratory ID Client Sample ID Date/Time Sampled Date Received 18111340-01 AG6420/WW-01 Raw Influent 11/28/2018 5:00 11/30/2018- Date/Time Data Parameter Method Result Units PQL Analyst Analyzed Flag Aluminum EPA 200.7 0.2 ' mg/L 0.1 KL 12/17/2018 17:18 Antimony EPA 200.8 <0.004 mg/L 0.004 JF 12/11/2018 17:32 Arsenic EPA 200.8 0.004 mg/L 0.004 JF 12/11/2018 17:32 Barium EPA 200.8 0.02 mg/L 0.02 JF 12/11/2018 17:32 Beryllium EPA 200.8 <0.004 mg/L 0.004 JF 12/11/2018 17:32 Cadmium EPA 200.8 <0.004 mg/L 0.004 JF 12/11/2018 17:32 Calcium EPA 200.7 20 mg/L 1 KL 12/17/2018 17:18 Chromium EPA 200.8 0.004 mg/L 0.004 , JF 12/11/2018 17:32 Cobalt EPA 200.8 <0.004 mg/L 0.004 JF 12/11/2018 17:32 Copper EPA 200.8 0.031 mg/L 0.004 JF 12/11/2018 17:32 Iron EPA 200.7 1.0 mg/L 0.1 KL 12/17/2018 17:18 Lead EPA 200.8 0.004 mg/L 0.004 JF 12/11/2018 17:32 Magnesium EPA 200.7 4 mg/L 1 KL 12/17/2018 17:18 Manganese EPA 200.8 0.060 mg/L 0.004 JF 12/11/2018 17:32 Mercury EPA 245.1 <0.0001 mg/L 0.0001 KL 12/11/2018 10:25 Molybdenum EPA 200.8 <0.03 mg/L 0.03 JF 12/11/2018 17:32 B Nickel EPA 200.8 <0.004 mg/L 0.004 JF 12/11/2018 17:32 Potassium EPA 200.7 12 mg/L 1 KL 12/17/2018 17:18 Selenium EPA 200.8 <0.020 mg/L 0.02 JF 12/11/2018 17:32 Silver EPA 200.8 <0.004 mg/L 0.004 JF 12/17/2018 12:18 Sodium EPA 200.7 39 mg/L 1 KL 12/17/2018 17:18 S Thallium EPA 200.8 <0.002 mg/L 0.002 JF 12/11/2018 17:32 Vanadium EPA 200.8 <0.004 mg/L 0.004 JF 12/11/2018 17:32 Zinc EPA 200.8 0.08 mg/L 0.04 JF 12/11/2018 17:32 Revision vl Page 2 of 16 ........ ..... . ,. Silver State Labs-Reno Analytical Report '„I''''' 1135 Financial Blvd �,��; ��;,sUverState;,�.....,, ':.: ..; Reno,NV 89502 i analytic ll Laboratories (775)857-2400 FAX:(888)398-7002 Workorder#: 18111340 0 Sierra Environmental monitoring Date Reported: 1/11/2019 - www.ssalabs.com Client: SOUTH TAHOE PUBLIC UTILITY DISTRICT Sampled By: • Project Name: EPA Priority Pollutants/Inf Eff Cent Cake PO#: Laboratory Accreditation Number: NV015/CA2990 Laboratory ID Client Sample ID Date/Time Sampled Date Received 18111340-02 AG64323/WW-04 Final Effluent 11/28/2018 8:00 11/30/2018 i Date/Time Data Parameter Method Result Units PQL Analyst Analyzed Flag Aluminum EPA 200.7 <0.05 mg/L 0.05 KL 12/17/2018 17:22 Antimony EPA 200.8 <0.002 mg/L 0.002 JF 12/11/2018 17:51 Arsenic EPA 200.8 <0.002 mg/L 0.002 JF 12/11/2018 17:51 Barium EPA 200.8 <0.01 mg/L 0.01 JF 12/11/2018 17:51 Beryllium EPA 200.8 <0.002 mg/L 0.002 JF 12/11/2018 17:51 Cadmium EPA 200.8 <0.002 mg/L 0.002 JF 12/11/2018 17:51 Calcium EPA 200.7 19 mg/L 0.5 KL 12/17/2018 17:22 Chromium EPA 200.8 <0.002 mg/L 0.002 JF 12/11/2018 17:51 Cobalt EPA 200.8 <0.002 mg/L 0.002 JF 12/11/2018 17:51 Copper EPA 200.8 0.010 mg/L 0.002 JF 12/11/2018 17:51 Iron EPA 200.7 0.23 mg/L 0.05 KL 12/17/2018 17:22 Lead EPA 200.8 <0.002 mg/L 0.002 JF 12/11/2018 17:51 Magnesium EPA 200.7 4.5 mg/L 0.5 KL 12/17/2018 17:22 Manganese EPA 200.8 0.042 mg/L 0.002 JF 12/11/2018 17:51 Mercury EPA 245.1 <0.0001 mg/L 0.0001 KL 12/11/2018 10:25 Molybdenum EPA 200.8 <0.02 mg/L 0.002 JF 12/11/2018 17:51 B Nickel EPA 200.8 <0.002 mg/L 0.002 JF 12/11/2018 17:51 Potassium EPA 200.7 12 mg/L 0.5 KL 12/17/2018 17:22 Selenium EPA 200.8 <0.01 mg/L 0.01 JF 12/11/2018 17:51 Silver EPA 200.8 <0.002 mg/L 0.002 JF 12/17/2018 12:24 Sodium EPA 200.7 52 mg/L 0.5 KL 12/17/2018 17:22 S Thallium EPA 200.8 <0.001 mg/L 0.001 JF 12/11/2018 17:51 Vanadium EPA 200.8 <0.002 mg/L 0.002 JF 12/11/2018 17:51 Zinc EPA 200.8 <0.02 mg/L 0.02 JF 12/11/2018 17:51 Revision vl • Page 3 of 1.6 ......... ............... s,.�. y ; iver tate a s- eno Analytjca1 ReportSdverSfafe 1135 Financial Blvd'x€ � ,ip Analytical;Laboratories Reno,NV 89502 7 FAX (888)398 7002 Workorder#: 18111340 ;.:...... (7 5)857-2400 - .,C;,, Environmentalierra. Monitoring ring Date Reported: 1/11/2019 www.ssalabs.com Client: SOUTH TAHOE PUBLIC UTILITY DISTRICT Sampled By: Auto Sampler/ Project Name: EPA Priority Pollutants/Inf Eff Cent Cake PO#: Laboratory Accreditation Number: NV015/CA2990 Laboratory ID Client Sample ID Date/Time Sampled Date Received 18111340-03 AG64325/WW-10 Centrifuge Cake-Dry 11/28/2018 11:00 , 11/30/2018 Date/Time Data Parameter Method Result Units PQL Analyst Analyzed' Flag Antimony EPA 6020 1 mg/Kg 1 _ JF 12/11/2018 15:29 Arsenic EPA 6020 4 mg/Kg 1 JF 12/11/2018 15:29 Barium EPA 6020 79 mg/Kg 5 JF 12/11/2018 15:29 Beryllium EPA 6020 <1 mg/Kg 1 JF 12/11/2018 15:29 Cadmium EPA 6020 1 mg/Kg 1 JF 12/11/2018 15:29 Chromium EPA 6020 9 mg/Kg 1 JF 12/11/2018 15:29 Cobalt EPA 6020 1 mg/Kg 1 JF 12/11/2018 15:29 Copper EPA 6020 140 mg/Kg 1 JF 12/11/2018 15:29 S Lead EPA 6020 4 mg/Kg 1 JF 12/11/2018 15:29 Manganese EPA 6020 59 mg/Kg 1 JF 12/11/2018 15:29 Mercury SW-846 7471B 0.25 mg/L 0.03 KL 12/11/2018 10:35 Molybdenum •EPA 6020 11 mg/Kg 5 JF 12/11/2018 15:29 B Nickel EPA 6020 5 mg/Kg 1 JF 12/11/2018 15:29 Selenium EPA 6020 <5 mg/Kg 5 JF 12/11/2018 15:29 Silver EPA 6020 1 mg/Kg 1 JF 12/11/2018 15:29 Thallium EPA 6020 <0.5 mg/Kg 0.5 JF 12/11/2018 15:29 Vanadium EPA 6020 12 mg/Kg 1 JF 12/11/2018 15:29 Zinc EPA 6020 360 mg/Kg 10 JF 12/11/2018 15:29 S Revision v 1 Page 4 of 16 t ..,,tS11 ,:aiState Silver State Labs-Reno Analytical Report 0 1135 Financial Blvd '"A' Reno NV 89502 . , . Analytical : b ir' r`:' s Workorder#: 18111340 (775)857-2400 FAX:(888)398-7002 , SierraEnvironmental Monitoring Date Reported: 1/11/2019 www.ssalabs.com Client: SOUTH TAHOE PUBLIC UTILITY DISTRICT Sampled By: Auto Sampler/ Project Name: EPA Priority Pollutants/Inf Eff Cent Cake PO#: Laboratory Accreditation Number: NV015/CA2990 Laboratory ID Client Sample ID Date/Time Sampled Date Received 18111340-04 AG64325/WW-10 Centrifuge Cake-Wet 11/28/2018 11:00 11/30/2018 Date/Time Data Parameter Method Result Units PQL Analyst Analyzed Flag Antimony EPA 6020 0.34 mg/Kg 0.34 JF 12/11/2018 0:00 Arsenic EPA 6020 1.4 mg/Kg 0.34 JF 12/11/2018 0:00 Barium EPA 6020 27 mg/Kg 1.7 JF 12/11/2018 0:00 Beryllium EPA 6020 <0.34 mg/Kg 0.34 JF 12/11/2018 0:00 Cadmium EPA 6020 0.34 mg/Kg 0.34 JF 12/11/2018 0:00 Chromium EPA 6020 3.1 mg/Kg 0.34 JF 12/11/2018 0:00 Cobalt EPA 6020 0.34 mg/Kg 0.34 JF 12/11/2018 0:00 Copper EPA 6020 48 mg/Kg 0.34 JF 12/11/2018 0:00 Lead EPA 6020 1.4 mg/Kg 0.34 JF 12/11/2018 0:00 Manganese EPA 6020 20 mg/Kg 0.34 JF 12/11/2018 0:00 Mercury SW-846 7471B 0.08 mg/L 0.01 KL 12/11/2018 10:35 Molybdenum EPA 6020 3.7 mg/Kg 1.7 JF 12/11/2018 0:00 Nickel EPA 6020 1.7 mg/Kg 0.34 JF 12/11/2018 0:00 Percent Moisture SM 2540 G 66 % 0.1 KL 12/04/2018 16:00 Selenium EPA 6020 <1.7 mg/Kg 1.7 JF 12/11/2018 0:00 Silver EPA 6020 0.34 mg/Kg 0.34 JF 12/11/2018 0:00 Thallium EPA 6020 <0.17 mg/Kg 0.17 JF 12/11/2018 0:00 Vanadium EPA 6020 4.1 mg/Kg 0.34 JF 12/11/2018 0:00 Zinc EPA 6020 120 mg/Kg 3.4 JF 12/11/2018 0:00 Revision vl Page 5 of 16 silverstateit er State Labs-Reno ,y �{ Quality Control Report s , 1135 Financial Blvd :.,> .. Reno,NV 89502 AnalyticalWO# Laboratories 18111340 (775)857-2400 FAX:(888)398-7002 Sierra Environmental tal: o itoring 1/11/2019 www.ssalabs.com Analysis: Mercury Method: EPA 245.1 Batch ID: R24241 Method Blank RunID: 24241 SeqNo 540893 Units: mg/L Analysis Date: 12/11/2018 10:25:24 AM Analyst: KL Analyte Result Rep Limit Rep Qual Mercury <0.0001 0.0001 Laboratory Control Sample(LCS) RunID: 24241 SeqNo 540894 Units: mg/L Analysis Date: 12/11/2018 10:25:24 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 Mercury 0.006000 0.00567 94.5 Matrix Spike(MS)/Matrix Spike Duplicate(MSD) Sample Spiked: 18120398-01C RunID: 24241 SeqNo 540909 Units: mg/L Analysis Date: 12/11/2018 10:25:24 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 Mercury 0.005000f 0.004771 95.4.005000 0.00471 94.2 1.27 20 70 130 Matrix Spike(MS)/Matrix Spike Duplicate(MSD) Sample Spiked: 18120399-13C RunID: 24241 SeqNo 540921 Units: mg/L Analysis Date: 12/11/2018 10:25:24 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 Mercury 0.005000 0.00486n 97.2:005000-100466 93.2 4.20 20 70 130 Analysis: Mercury,RCRA Solid Method: SW-846 7471B Batch ID: R24243 Method Blank RunID: 24243 SeqNo 540948 Units: mg/L • Analysis Date: 12/11/2018 10:35:54 AM Analyst: KL Analyte Result Rep Limit Rep Qual Mercury <0.03 0.03 Laboratory Control Sample(LCS) RunID: 24243 SeqNo 540949 Units: mg/L Analysis Date: 12/11/2018 10:35:54 AM Analyst: KL Revision vl Page 6 of 16 rState /3 ;� Silver State Labs-Reno Quality Control Report ' ; . SIIV,, 1135 Financial Blvd i` s,� :r> w. Laboratories Reno,NV 89502 WO#: 18111340 • � 7 FAX 8 ) 98 7002 (7 5) 57-2 0 Sierra Env r.Qnmer tal Monitoring 1/11/2019 www.ssalabs.com Analyte LCS LCS Result LCS% LCSD LCSD LCSD% RPD RPD Low High Qual Spike Recovery Spike Result Recovery Limit Limit Limit Added Added Mercury 0.006000 <0:0300 102 Matrix Spike(MS)I Matrix Spike Duplicate(MSD) Sample Spiked: 18111340-03A RunID: 24243 SeqNo 540952 Units: mg/Kg Analysis Date: 12/11/2018 10:35:54 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 Mercury 0.2500 1.420 1.49 87.3 1.420 1.4584.5 2.72 20� 80 120 Analysis: Metals 6020 Solid Method: EPA 6020 Batch ID: R24332 Method Blank RunID: 24332 SeqNo 542987 Units: mg/Kg Analysis Date: 12/11/2018 3:09:31 PM Analyst: JF Analyte Result Rep Limit Rep Qual Antimony <0.020 0.020 Arsenic <0.020 0.020 Barium <0.10 0.10 Beryllium <0.020 0.020 Cadmium <0.020 0.020 Chromium <0.020 0.020 Cobalt <0.020 0.020 Copper <0.020 0.020 Lead <0.020 0.020 Manganese <0.020 0.020 Molybdenum 0.093 0.020 B Nickel <0.020 0.020 Selenium <0.10 0.10 Silver <0.020 0.020 Thallium <0.010 0.010 Vanadium <0.020 0.020 Zinc <0.20 0.20 • Laboratory Control Sample(LCS) RunID: 24332 SeqNo 542986 Units: mg/L Analysis Date: 12/11/2018 3:02:59 PM Analyst: JF Analyte LCS LCS Result LCS Y. LCSD LCSD LCSD% RPD RPD Low High Qual Spike Recovery Spike Result Recovery Limit Limit Limit. Added Added, Antimony 0.1000 0.10 104 • Arsenic 0.1000 0.10 99.7 Barium 0.1000 0.10 102 / Beryllium 0.1000 0.10 104 Revision vl Page 7 of 16 Silver State Labs-Reno ` y' '�w5Riad Quality Control Report ; ''' ''°'''''' .: 1135 Financial Blvd srfy�> '.��:£# : k�a�;� Analytical : � ......: Reno,NV 89502 n lyti al La ori WO#: 18111340 (775)857-2400 FAX:(888)398-7002 0 Sierra Environmental.Monitoring rii►g 1/11/2019 - www.ssalabs.com Cadmium 0.1000 0.10 101 Chromium 0.1000 0.099 99.4 Cobalt 0.1000 0.099 99.3 , Copper - 0.1000 0.10 100 Lead 0.1000 0.10 103 Manganese 0.1000 0.10 100 Molybdenum 0.1000 0.10 102 Nickel 0.1000 0.099 99.1 Selenium 0.5000 0.51 101 Silver 0.1000 0.099 99.5 Thallium 0.1000 0.10 101 Vanadium 0.1000 0.099 98.5 Zinc 0.1000 0.097 97.2 Matrix Spike(MS)/Matrix Spike Duplicate(MSD) Sample Spiked: 18111340-03A RunID: 24332 SeqNo 542991 Units: mg/Kg Analysis Date: 12/11/2018 3:35:35 PM Analyst: JF , Analyte Sample MS MS MS% MSD MSD MSD% RPD RPD Low High Qual Result Spike Result Recovery Spike Result Recovery Limit Limit Limit Added Added Antimony 1.160 100.0 89 87.4 100.0 87 85.9 1.70 20 70 130 Arsenic 4.088 100.0 94 90.0 100.0 91 87.3 2.98 20 70 130 Barium 78.51 100.0 170 93.2 100.0 170 87.8 3.21 , 20 70 130 Beryllium 0.1240 100.0 97 96.5 100.0 93 93.3 3.33 20 70 130 Cadmium 1.064 100.0 94 93.4 100.0 91 90.0 3.64 20 70 130 Chromium 9.120 100.0 98 89.0 100.0 94 85.2 3.98 20 70 130 Cobalt 1.261 100.0 91 89.7 100.0 89 88.0 1.86 20 70 130 Copper 139.9 100.0 190 48.9 100.0 190 45.4 1.88 20 70 130 S Lead 4.161 100.0 84 79.6 100.0 83 79.1 0.666 20 70 130 Manganese 59.05 100.0 150 93.4 100.0 150 86.4 4.73 20 70 130 Molybdenum 10.55 100.0 110 97.8 100.0 110 94.6 2.94 20 70 130 Nickel 5.085 100.0 96 90.6 100.0 92 86.9 4.01 20 70 130 Selenium 1.697 500.0 460 91.3 500.0 450 89.1 2.38 20 70 130 Silver 1.028 20.00 21 99.9 20.00 21 99.6 0.285 20 70 130 Thallium 0.03097 100.0 74 73.7 100.0 76 75.9 3.03 20 70 130 Vanadium 12.23 100.0 100 88.9 100.0 97 84.3 4.64 20 70 130 Zinc 358.7 100.0 380 26.0 100.0 380 22.7 0.860 20 70 130 S Analysis: Metals 200.8 Method: EPA 200.8 Batch ID: R24339 Method Blank RunID: 24339 SeqNo 543295 Units: mg/L Analysis Date: 12/11/2018 4:46:42 PM Analyst: JF Analyte Result, Rep Limit Rep Qual Antimony <0.0020 0.0020 Arsenic <0.0020 0.0020 Barium <0.010 0.010 • Revision vl Page 8 of 16 : , Silver State Labs-Reno.� y Quality Control Report z - al tr� S r St te 1135 Financial Blvd ----, V WO#: 18111340 £: '''>:'" ncil C t (::: ri Reno,NV 89502 .. (7 75)857-2400 FAX:(888)398-7002 -gin`Sierra Environmental on toning 1/11/2019 a `` www.ssalabs.com Beryllium <0.0020 0.0020 Cadmium <0.0020 0.0020 Chromium <0.0020 0.0020 Cobalt <0.0020 0.0020 Copper <0.0020 0.0020 , Lead <0.0020 0.0020 Manganese <0.0020 0.0020 " Molybdenum 0.0068 0.0020 B Nickel <0.0020 0.0020 Selenium <0.010 0.010 Thallium <0.0010 0.0010 Vanadium <0.0020 0.0020 Zinc <0.020 0.020 S Laboratory Control Sample(LCS) RunID: 24339 SeqNo 543280 Units: mg/L Analysis Date: 12/11/2018 3:02:59 PM Analyst: JF Analyte LCS LCS Result LCS% LCSD LCSD LCSD% RPD RPD Low High Qual Spike Recovery Spike Result Recovery Limit Limit Limit Added Added Antimony 0.1000 0.10 104 Arsenic 0.1000 0.10 99.7 Barium 0.1000 0.10 102 Beryllium 0.1000 0.10 104 Cadmium 0.1000 0.10 101 Chromium 0.1000 0.099 99.4 Cobalt 0.1000 0.099 99.3 Copper 0.1000 0.10 100 Lead 0.1000 ' 0.10 103 Manganese 0.1000 0.10 100 Molybdenum 0.1000 0.10 102 Nickel 0.1000 0.099 99.1 Selenium 0.5000 0.51 101 Thallium 0.1000 0.10 101 Vanadium 0.1000 0.099 98.5 Zinc 0.1000 0.097 97.2 Matrix Spike(MS)/Matrix Spike Duplicate(MSD) Sample Spiked: 18111338-01B RunID: 24339 SeqNo 543300 Units: mg/L Analysis Date: 12/11/2018 5:19:16 PM Analyst: JF Analyte Sample MS MS MS% MSD MSD MSD% RPD RPD Low High Qual Result Spike Result Recovery Spike Result Recovery Limit Limit Limit Added Added Antimony 0 1.000 0.97: 97.2 1.000 0.96 96.3 0.983 20 70 130 Arsenic 0.01546 1.000 0.92 90.6 1.000 0.89 87.9 3.04 20 70 130 Barium 0.04622 1.000 0.97 92.5 1.000 0.95 90.4 2.15 20 70 130 Beryllium 0 1.000 0.997 99.1 1.000 0.97 97.5 1.68 20 70 130 Cadmium 0 1.000 0.92 91.9 1.000 0.90 89.5 2.58 20. 70 130 Revision vl Page 9 of 16 `� siiverstate i Silver State Labs-Reno Quality Control Report �fi r � 1135 Financial Blvd m ?:v.' :.. �' .:: • Reno,NV 89502 'ip:.:: ri l 'ticai Laboratories WO#: 18111340 7 0 FAX (888) 98 7002 0 Sierra Environmental (onitoring ( 5)857-21/11/2019 www.ssalabs.com Chromium ).002219 1.000 0.89 88.7 1.000 0.89 89.2 0.576 20 70 130 Cobalt 0001766 1.000 0.89 88.5 1.000 0.88 87.7 0.956 20 70 130 Copper 0 1.000 0.88 88.3 1.000 0.87 86.8 1.75 20 70 130 Lead 0 1.000 1.0 101 1.000 0.99 99.2 1.68 20 70 130 Manganese 0 1.000 0.90 89.7 1.000 0.89 89.4 0.322 20 70 130 Molybdenum ).007272 1.000 0.92 91.2 1.000 0.94 92.8 1.72 , 20 70 130 Nickel ).002952 1.000 0.88 88.0 1.000 0.87 86.6 1.55 20 70 130 Selenium ).002421 5.000 4.6 92.3 5.000 4.5 89.8 2.76 20 70 130 Thallium 0 1.000 0.93 93.2 1.000 0.91 91.4 1.95 20 70 130 Vanadium 0.01433 1.000 0.91 89.4 1.000 0.90 88.6 0.897 20 70 130 Zinc ).004258 1.000 0.88 87.9 1.000 0.86 85.8 2.40 20 70 130 Analysis: Metals 200.7 Method: EPA 200.7 Batch ID: R24444 Method Blank RunID: 24444 SeqNo 546005 Units: mg/L Analysis Date: 12/17/2018 4:10:04 PM Analyst: KL Analyte Result Rep Limit Rep Qual Aluminum <0.050 0.050 Calcium <0.50 0.50 Iron <0.050 0.050 Magnesium <0.50 0.50 Potassium <0.50 0.50 Sodium <0.50 0.50 Revision vl Page 10 of 16 _> Silver ate SiIverSfafe ' °° ; a s- e Quality ControlReport vd:. . ,: Reno,NV 89502 WO#: 18111340 (775)857-2400 FAX:(888)398-7002 Sierra Environmental Monitoring 1/11/2019 www.ssalabs.com Method Blank RunID: 24444 SeqNo 546027 Units: mg/L Analysis Date: 12/17/2018 4:53:14 PM Analyst: KL Analyte Result Rep Limit Rep Qual Aluminum <0.050 0.050 Calcium <0.50 0.50 Iron <0.050 0.050 Magnesium <0.50 0.50 Potassium <0.50 0.50 Sodium <0.50 0.50 Revision vl Page 11 of 1.6 `w t;3.�... Silver Q ali Control Report% rSttesetatbno �Analytical Laboratories Reno,NV 89502 WO#: 18111340 4 2 • Sierra Enuir..onmer�tal Monitoring 1/11/2019 857-2400 FAX:(888)398-7002 1/11/2019 www.ssalabs.com Method Blank RunID: 24444 SeqNo 546145 Units: mg/L Analysis Date: 12/17/2018 9:02:30 PM Analyst: KL Analyte Result Rep Limit Rep Qual Aluminum <0.050 0.050 Calcium <0.50 0.50 Iron 0.073 0.050 B Magnesium <0.50 0.50 Potassium <0.50 0.50 Sodium <0.50 0.50 Laboratory Control Sample(LCS) RunID: 24444 SeqNo 546023 . Units: mg/L Analysis Date: 12/17/2018 4:48:56 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 Aluminum 6.000 6.0 101 Calcium 30.00 31 103 Iron 6.000 6.1 102 Magnesium 30.00 30 101 Potassium 30.00 30 100 Sodium 30.00 29 97.5 Matrix Spike(MS)I Matrix Spike Duplicate(MSD) Sample Spiked: 18111338-01B RunID: 24444 SeqNo 546035 Units: mg/L Analysis Date: 12/17/2018 5:05:39 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 Aluminum 0.01519 5.000 5.1 103 5.000 5.0 99.6 2.93 20 70 130 Calcium 50.28 20.00 70 98.9 20.00 67 83.5 4.50 20 70 130 Iron 0.06177 5.000 5.2 104 5.000 5.1 101- 2.90 20 70 130 Magnesium 11.74 20.00 32 102 20.00 31 96.6 3.43 20 70 130 Potassium 8.861 20.00 29 103 20.00 29 98.5 3.16 20 70 130 Sodium 81.58 20.00 100 91.3 20.00 95 69.1 4.54 20 70 130 S Matrix Spike(MS)/Matrix Spike Duplicate(MSD) Sample Spiked: 18120399-01C RunID: 24444 SeqNo 546125 Units: mg/L Analysis Date: 12/17/2018 8:19:29 PM Analyst: KL Analyte Sample MS MS MS% MSD MSD MSD% RPD RPD Low High Qual Result Spike Result Recovery Spike Result Recovery Limit Limit Limit Added Added Aluminum 0.2070 5.000 5.3 102 5.000 5.2 100 1.85 20 70 130 Calcium 26.59 20.00 47 101 20.00 46 94.7 2.68 20 70 130 Iron 0.1409 5.000 5.3- 104 5.000 5.3 104 0.281 20 70 130 Revision vl Page 12 of 16 � Silver State Labs-Reno Quality on ro epor :, .. . Reno NV 89502 Analytical L orat r WO#: 18111340 (775)857-2400 FAX:(888)398-7002 Sierra Environmental Monitoring 1/11/2019 www.ssalabs.com Magnesium 11.73 20.00 32 103 20.00 32 98.9 2.53 20 70 130 Potassium 33.38 20.00 54 103 20.00 53 96.2 2.53 20 70 130 Sodium 129.1 20.00 140 73.2 20.00 140 69.2 0.562 20 70 130 S Matrix Spike(MS)/Matrix Spike Duplicate(MSD) Sample Spiked: 18120411-01B RunID: 24444 SeqNo 546177 Units: mg/L Analysis Date: 12/17/2018 10:11:19 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 Aluminum 0.08903 5.000 5.2 102 5.000 4.5 89.0 13.0 20 70 130 Calcium 100.6 20.00 120 89.6 20.00 110 70.1 3.35 20 70 130 Iron 0.5954 5.000 5.9 106 5.000 5.2 92.6 11.8 20 70 130 Magnesium 0.1963 20.00 21 106 20.00 19 92.7 13.5 20 70 130 Potassium 55.90 20.00 76 99.8 20.00 72 80.3 5.28 20 70 130 Sodium 913.1 20.00 910 -24.6 20.00 930 65.8 1.97 20 70 130 S Analysis: Metals 200.8 Method: EPA 200.8 Batch ID: R24445 Method Blank RunID: 24445 SeqNo 546206 Units: mg/L Analysis Date: 12/17/2018 11:39:08 AM Analyst: JF Analyte Result Rep Limit Rep Qual Silver <0.0020 0.0020 Laboratory Control Sample(LCS) RunID: 24445 SeqNo 546205 Units: m9/L Analysis Date: 12/17/2018 11:29:33 AM Analyst: JF Analyte LCS LCS Result LCS% LCSD LCSD LCSD% RPD RPD Low High Qual Spike Recovery Spike Result Recovery Limit Limit Limit Added Added Silver 0.1000 0.10 101 Matrix Spike(MS)/Matrix Spike Duplicate(MSD) Sample Spiked: 18111338-01B RunID: 24445 SeqNo 546210 Units: mg/L Analysis Date: 12/17/2018 12:05:13 PM Analyst: JF 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 Silver 0 0.2000 0.21 106 0.2000 0.20 101 4.64 20 70 130 Revision vl Page 13 of 16 ; '.:K''.fi. r': ---. • ' $s'UTHTAHOE _ . _ DISTRICT , t f� : 5 .. . 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LCSD:LCS Duplicate;used to calculate both Accuracy(%REC)and Precision(%RPD) MBLK:Method Blank;a sample of similar matrix that is processed simultaneously with and under the same conditions as samples through all steps of the analytical procedure,and in which no target analytes or interferences are present at concentrations that impact the analytical results for sample analyses. MS:Matrix Spike;prepared by adding a known mass of target analytes to a specified amount of matrix sample for which an independent estimate of target analyte concentration is available,used to calculate Accuracy(%REC) MSD:Matrix Spike Duplicate;used to calculate both Accuracy(%REC)and Precision(%RPD) RPD:Relative Percent Difference;comparison between sample and duplicate and/or MS and MSD. PQL:Practical Quantitation Limit;the limit to which data is quantitated for reporting. MDL:Method Detection Limit;the limit to which the instrument can reliably detect. MCL:Maximum Contaminant Level;value set according to EPA guidelines. Qualifiers: *-Analyte exceeds Safe Drinking Water Act MCL,does not meet drinking water standards. C-Analyte value below Safe Drinking Water Act MCL,does not meet drinking water standards. B-Analyte found above the PQL in associated method blank. G-Calibration blank analyte detected above PQL. H-Sample analyzed beyond holding time for this parameter. J-Estimated Value;Analyte found between MDL and PQL limits. L-Sample concentration is at least 5 times greater than spike contribution. Spike recovery criteria do not apply. R-RPD between sample and duplicate sample outside the RPD acceptance limits. S-Batch MS and/or MSD were outside acceptance limits,batch LCS was acceptable. W-Sample temperature when recieved was out of limit as specified by method. 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December 26, 2018 South Tahoe Public Utility District Lab ID : SP 1815814 1275 Meadow Crest Drive Customer : 2-11369 South Lake Tahoe, CA 96150 Laboratory Report Introduction: This report package contains total of 43 pages divided into 3 sections: Case Narrative (3 pages) : An overview of the work performed at FGL. Sample Results (20 pages) : Results for each sample submitted. Quality Control (20 pages) : Supporting Quality Control (QC)results. Case Narrative This Case Narrative pertains to the following samples: Sample Description Date Date FGL Lab ID# Matrix p p Sampled Received Travel Blank 11/29/2018 11/30/2018 SP 1815814-000 LBW WW-06 Raw Grab 11/29/2018 11/30/2018 SP 1815814-001 WW WW-05 Final Grab 11/29/2018 11/30/2018 SP 1815814-002 WW Raw Influent WW-01 11/28/2018 11/30/2018 ( SP 1815814-003 WW Final Effluent WW-04 11/28/2018 11/30/2018 SP 1815814-004 WW Centrifuge Cake 11/29/2018 11/30/2018 SP 1815814-005 Sld 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 2 °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 12/05/2018:214308 All preparation quality controls are within established criteria,except: The following note applies to 1,4-Dichlorobenzene,2-Chlorophenol,4-Nitrophenol,4-Chloro-3- methylphenol,Phenol,Pyrene: 3520 436 Blank Spike(BS)not within Acceptance Range(AR).Data was accepted based on the LCS or CCV recovery. The following note applies to Pyrene: 310 LCS above Acceptance Range(AR). Samples which were non detect for this analyte were accepted. 5030B 12/07/2018:214997 All preparation quality controls are within established criteria,except: Page 1 of 43 Y Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 December 26, 2018 Lab ID : SP 1815814 South Tahoe Public Utility District Customer :?' '':: 2-11369 Organic QC The following note applies to Dichloromethane: 210 The method blank was positive. However,samples reported were either ten times greater than the blank concentration or non detect and accepted. 5030B The following note applies to Toluene-d8: 435 Sample matrix may be affecting this analyte.Data was accepted based on the LCS or CCV recovery. The following note applies to Chlorobenzene: 435 Sample matrix may be affecting this analyte.Data was accepted based on the LCS or CCV recovery. 12/07/2018:214998 All preparation quality controls are within established criteria,except: The following note applies to 1,2-Dichloroethane-d4,Dibromofluromethane,4-Bromofluorobenzene: 435 Sample matrix may be affecting this analyte.Data was accepted based on the LCS or CCV recovery. 12/06/2018:217732 All analysis quality controls are within established criteria,except: 608/8081 The following note applies to Delta BHC: 360 CCV above Acceptance Range(AR). Samples which were non detect for this analyte were accepted. 12/06/2018:217870 All analysis quality controls are within established criteria,except: The following note applies to Dicofol,p,p-DDD: 360 CCV above Acceptance Range(AR). Samples which were non detect for this analyte were accepted. 12/03/2018:214169 All preparation quality controls are within established criteria,except: The following note applies to Alpha BHC,Beta BHC,Dieldrin,Endrin,Heptachlor,Methoxychlor: 436 Blank Spike(B(S)not within Acceptance Range(AR).Data was accepted based on the LCS or CCV recovery. The following note applies to Delta BHC,Dicofol,"Dieldrin,Endosulfan I,Endosulfan II,Endosulfan Sulfate,Endrin Aldehyde,;gamma-Chlordane,Heptach: 410 Relative Percent Difference(RPD)not within Maximum Allowable Value(MAV).Data was accepted based on the LCS or CCV recovery. 12/07/2018:217811 All analysis quality controls are within established criteria,except: 8082 The following note applies to Tetrachloro-m-xylene: 362 Surrogates are qualified on Control Chart Limits,these are CCV limits. See individual sample reports. 8082A 12/04/2018:214234 All preparation quality controls are within established criteria. 12/07/2018:218564 All analysis quality controls are within established criteria,except: 8260B The following note applies to 1,1,2,2-Tetrachloroethane, 1,2,3-Trichlorobenzene, 1,2,4-Trichlorobenzene, 1,4-Dioxane,2-Hexanone,Acrolein,Acrylonitr: 360 CCV above Acceptance Range(AR). Samples which were non detect for this analyte were accepted. 8270C 12/17/2018:218365 All analysis quality controls are within established criteria. Page 2 of 43 r December 26, 2018 Lab ID : SP 1815814 South Tahoe Public Utility District Customer : 2-11369 Organic QC 12/18/2018:218435 All analysis quality controls are within established criteria,except: 8270C The following note applies to 2,3,4,6-Tetrachlorophenol,Dibenzo(a,h)anthracene: 360 CCV above Acceptance Range(AR). Samples which were non detect for this analyte were accepted. 12/13/2018:214636 All preparation quality controls are within established criteria. Discussion of Analytical Results: - SP 1815814 SP 1815814-005 Centrifuge Cake For the Centrifuge Cake, the results for Acetone and 2-Butanone (MEK) should be considered estimated since they were above the calibration curve. (12/26/18) 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:VT Digitally signed by David Terz,B.A.,M.B.A. A roved ByDavid Terz,B.A. M.B.A. °'`''Title:QA Director pp • Date:2018-12-26 Page 3 of 43 .. .. .. ... ,..a ::'-,w C,•..,,}.., ti-'-♦ .... .... -,.>.,.:>. :...,,:.sas) w.... v. .0 2`t`c .,. '\..�. .,.. ....,..,E...�, ,,.,•..KBE.,...«.,...ti a. a. Y & :,.,. ...,.., ..... .,....,..,,..•...a...,. ... . r...:..........:.... ai. .. s! .y�.. '.mss, y. �::- .c.b..A.J.k�.e....,..1�.,,':,,k d....a:,, .. ,., . .. ,v. ....................,,.... . ,. .. .,..: .. :>r•.. V � i•.�'. i"Y.. Zh... ....t.vt.,v»....7.»v.�:'�:,,, , ,Cv.. ..,....,k.,......,..,v.>c.....,.�.. .. 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Blank Water Description : Travel Blank Project : AG64335 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 4-Bromofluorobenzene$ 106 78-123 % 5030B 12/07/18:214997 8260B 12/07/18:218564 DibromofluoromethaneI 101 65-125 % 5030B 12/07/18:214997 8260B 12/07/18:218564 1,2-Dich1oroethane-d41 99.6 58-144 % 5030B 12/07/18:214997 8260B 12/07/18:218564 • To1uene-d81 97.7 92-107 % 5030B 12/07/18:214997 8260B 12/07/18:218564 Acetone ND 50 ug/L 5030E 12/07/18:214997 8260B 12/07/18:218564 Acrolein ND 50 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Acrylonitrile ND 50 ug/L . 5030E 12/07/18:214997 8260B 12/07/18:218564 Benzene ND 0.5 ug/L 5030B ' 12/07/18:214997 8260B 12/07/18:218564 Bromobenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Bromochloromethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Bromodichloromethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Bromoform ND 2 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Bromomethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 tert-Butanol ND 5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 2-Butanone(MEK) ND 10 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 n-Butylbenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 sec-Butylbenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 tert-Butylbenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Carbon Disulfide ND 10 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Carbon Tetrachloride ND 1 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Chlorobenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Chloroethane ND 1 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Chloroform ND 1 ug/L5030B : ',:::12/07/18:214997 8260B 12/07/18:218564 Chloromethane ND 0.5 ug/L 5030Bi`'' 1'2/07/18:214997 8260B 12/07/18:218564 2-Chlorotoluene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 14-Chlorotoluene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Dibromochloromethane ND 2 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Dibromomethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,2-Dichlorobenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,3-Dichlorobenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,4-Dichlorobenzene ND 0.5 ug/L 5030B 12/07/18:214997 ' 8260B 12/07/18:218564 Dichlorodifluoromethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,1-Dichloroethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,2-Dichloroethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,1-Dichloroethylene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Page 4 of 43 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182. TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 December 26, 2018 Lab ID : SP 1815814-000 Description : Travel Blank Customer ID : 2-11369 Sample Result-Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 cis-1,2-Dichloroethylene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 trans-1,2-Dichloroethylene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,2-Dichloropropane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,3-Dichloropropane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 2,2-Dichloropropane ND 0.5 ug/L 5030B , 12/07/18:214997 8260B 12/07/18:218564 1,1-Dichloropropene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 cis-1,3-Dichloropropene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 trans-1,3-Dichloropropene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Di-isopropyl ether(DIPE) ND 5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,4-Dioxane ND 200 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Ethyl Benzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Ethyl tert-butyl ether (ETBE) ND 2 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Hexachlorobutadiene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 2-Hexanone ND 10 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Isopropylbenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 p-Isopropyltoluene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Methyl tent-butyl ether ND 2 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 (MTBE) 4-Methyl-2-pentanone ND 10 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 (MIRK) Methylene Chloride ND 2 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Naphthalene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 n-Propylbenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Styrene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 tert-Amyl methyl ether (TAME) ND 5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,1,1,2-Tetrachloroethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,1,2,2-Tetrachloroethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Tetrachloroethylene ND • ' 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Toluene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,2,3-Trichlorobenzene ND 0.5 ug/L 5030B' 12/07/18:214997 8260B 12/07/18:218564 1,2,4-Trichlorobenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,1,1-Trichloroethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,1,2-Trichloroethane ND 0.5 . ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Trichloroethylene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Trichlorofluoromethane ND 1 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,2,3-Trichloropropane ND 1 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,2,4-Trimethylbenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,3,5-Trimethylbenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Vinyl Acetate ND 10 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Vinyl Chloride ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Page 5 of 43 December 26, 2018 Lab ID : SP 1815814-000 Description : Travel Blank Customer ID : 2-11369 Sample Result-Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 Xylenes ND -- ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Xylenes m,p ND 2 ug/L 5030B 12/07/18:214997 8260E 12/07/18:218564 Xylenes o ND 2 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 2-Chloroethylvinylether ND 10 ug/L ' 5030B 12/07/18:214997 8260B 12/07/18:218564 1,1,2- Trichlorotrifluoroethane ND 1 ug/L 5030B 12/07/18:214997 8260E 12/07/18:218564 ND=Non-Detected.PQL=Practical Quantitation Limit.$Surrogate.*PQL adjusted for dilution. 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December 26, 2018 Lab ID : SP 1815814-001 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : November 29, 2018-10:49 South Lake Tahoe, CA 96150 Sampled By : OPS/US/BC Received On : November 30, 2018-11:58 Matrix : Waste Water Description : WW-06 Raw Grab Project : EPA Pripority Pollutants AG64333 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 4-Bromofluorobenzenet 103 78-123 % 5030B 12/07/18:214997 8260B 12/07/18:218564 Dibromofluoromethane$ 103 65-125 % ' 5030B 12/07/18:214997 8260B 12/07/18:218564 1,2-Dichloroethane-d4t 105 58-144 % 5030B 12/07/18:214997 8260B 12/07/18:218564 Toluene-d81 93.4 92-107 % 5030B 12/07/18:214997 8260B 12/07/18:218564 Acetone 110 50 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Acrolein ND 50 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Acrylonitrile ND 50 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Benzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Bromobenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Bromochloromethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Bromodichlorolnethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Bromoform ND 2 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Bromomethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 tert-Butanol ND 5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 2-Butanone(MEK) ND 10 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 n-Butylbenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 sec-Butylbenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 tert-Butylbenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Carbon Disulfide ND 10 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Carbon Tetrachloride ND 1 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Chlorobenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Chloroethane ND 1 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Chloroform 3 1 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Chloromethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 2-Chlorotoluene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 4-Chlorotoluene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Dibromochlorolnethane ND 2 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Dibrolnomethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,2-Dichlorobenzene ND ' 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,3-Dichlorobenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260E 12/07/18:218564 1,4-Dichlorobenzene ND 0.5 ug/L 5030E 12/07/18:214997 8260B 12/07/18:218564 Dichlorodifluoromethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 ' 1,1-Dichloroethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,2-Dichloroethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,1-Dichloroethylene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Page 7 of 43 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 December 26, 2018 Lab ID : SP 1815814-001 Description : WW-06 Raw Grab Customer ID : 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method. Date/ID Method Date/ID EPA 8260q: cis-1,2-Dichloroethylene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 trans-1,2-Dichloroethylene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,2-Dichloropropane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,3-Dichloropropane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 2,2-Dichloropropane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,1-Dichloropropene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 cis-1,3-Dichloropropene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 trans-1,3-Dichloropropene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Di-isopropyl ether(DIPE) ND 5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,4-Dioxane ND 200 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Ethyl Benzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Ethyl tent-butyl ether ND 2 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 (ETRE) Hexachlorobutadiene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 2-Hexanone ND 10 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Isopropylbenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 p-Isopropyltoluene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Methyl tent-butyl ether ND 2 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 (MTBE) 4-Methyl-2-pentanone ND 10 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 (MIRK) Methylene Chloride ND 2 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Naphthalene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 n-Propylbenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Styrene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 tert-Amyl methyl ether (TAME) ND 5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,1,1,2-Tetrachloroethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,1,2,2-Tetrachloroethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Tetrachloroethylene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Toluene 5.4 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,2,3-Trichlorobenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,2,4-Trichlorobenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,1,1-Trichloroethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,1,2-Trichloroethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Trichloroethylene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Trichlorofluoromethane ND 1 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,2,3-Trichloropropane ND 1 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,2,4-Trilnethylbenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,3,5-Trimethylbenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Vinyl Acetate ND 10 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Vinyl Chloride ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Page 8 of 43 December 26, 2018 Lab ID : SP 1815814-001 Description : WW-06 Raw Grab Customer ID : 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 Xylenes ND -- ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Xylenes m,p ND 2 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Xylenes o ND - 2 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 2-Chloroethylvinylether ND 10 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,1,2- Trichlorotrifluoroethane ND 1 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 ND=Non-Detected.PQL=Practical Quantitation Limit.$Surrogate.*PQL adjusted for dilution. • Page 9 of 43 x .. 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December 26, 2018 Lab ID : SP 1815814-002 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : November 29, 2018-11:05 South Lake Tahoe, CA 96150 Sampled By : OPS/US/BC Received On : November 30, 2018-11:58 Matrix : Waste Water Description : WW-05 Final Grab Project : EPA Pripority Pollutants AG64334 Sample Result-Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 4-Bromofluorobenzenet 96.4 78-123 % 5030B 12/07/18:214997 8260B 12/07/18:218564 Dibromofluoromethane$ 101 65-125 % L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,2-Dichloroethane-d41 108 58-144 % 5030B 12/07/18:214997 8260B 12/07/18:218564 Toluene-d8 92.9 92-107 % 5030B 12/07/18:214997 8260B 12/07/18:218564 Acetone ND 50 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Acrolein ND 50 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Acrylonitrile ND 50 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Benzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Broinobenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Bromochloromethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Bromodichloromethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Bromoform ND 2 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Bromomethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 tert-Butanol ND 5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 2-Butanone(MEK) ND 10 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 n-Butylbenzene ND 0.5 ug/L 5030B `(-12/07/18:214997 8260B 12/07/18:218564 sec-Butylbenzene ND 0,5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 tert-Butylbenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Carbon Disulfide ND 10 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Carbon Tetrachloride ND 1 ug/L 5030B 12/07/18:214997 8260B , 12/07/18:218564 Chlorobenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Chloroethane ND 1 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Chloroform 2 1 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Chloromethane ND 0.5 ug/L 5030E 12/07/18:214997 8260B 12/07/18:218564 2-Chlorotoluene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 4-Chlorotoluene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Dibromochloromethane ND 2 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Dibromomethane - ND 0.5 ug/L 5030B ,: 12/07/18:214997 8260B 12/07/18:218564 1,2-Dichlorobenzene ND 0.5 ug/L 5030B ; 12/07/18:214997 8260B 12/07/18:218564 1,3-Dichlorobenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,4-Dichlorobenzene ND 0.5 ug/L 5030E 12/07/18:214997 8260B 12/07/18:218564 Dichlorodifluoromethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,1-Dichloroethane ND 0.5 ug/L 5030B 12/07/18:214997 8260E 12/07/18:218564 1,2-Dichloroethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,1-Dichloroethylene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 i Page 10 of 43 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road } 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 December 26, 2018 Lab ID : SP 1815814-002 Description : WW-05 Final Grab Customer ID : 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 cis-1,2-Dichloroethylene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 trans-1,2-Dichloroethylene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,2-Dichloropropane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,3-Dichloropropane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 2,2-Dichloropropane ND 0.5 ug/L 5030B. 12/07/18:214997 8260B 12/07/18:218564 1,1-Dichloropropene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 cis-1,3-Dichloropropene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 trans-1,3-Dichloropropene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Di-isopropyl ether(DIPE) ND 5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,4-Dioxane ND 200 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Ethyl Benzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Ethyl tent-butyl ether ND 2 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 (ETRE) Hexachlorobutadiene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 2-Hexanone ND 10 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Isopropylbenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 p-Isopropyltoluene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Methyl tert-butyl ether (MTBE) ND 2 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 4-Methyl-2-pentanone (MIBK) ND 10 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Methylene Chloride ND 2 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Naphthalene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 n-Propylbenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Styrene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 tert-Amyl methyl ether ND 5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 (TAME) 1,1,1,2-Tetrachloroethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,1,2,2-Tetrachloroethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Tetrachloroethylene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:21856d Toluene ND 0.5 ug/L 5030B , 12/07/18:214997 8260B 12/07/18:218564 1,2,3-Trichlorobenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,2,4-Trichlorobenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,1,1-Trichloroethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,1,2-Trichloroethane ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Trichloroethylene ND 0.5 ug/L 5030B \12/07/18:214997 8260B 12/07/18:218564 Trichlorofluoromethane ND 1 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 . 1,2,3-Trichloropropane ND 1 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,2,4-Trimethylbenzene ND 0.5 ug/L C 5030B 12/07/18:214997 8260B 12/07/18:218564 1,3,5-Trimethylbenzene ND 0.5 ug/L 5030B 12/07/18:214997 8260E 12/07/18:218564 Vinyl Acetate ND 10 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Vinyl Chloride ND 0.5 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Page 11 of 43 • December 26, 2018 Lab ID : SP 1815814-002 Description : WW-05 Final Grab Customer ID : 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 Xylenes ND -- ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Xylenes m,p ND 2 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 Xylenes o ND 2 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 2-Chloroethylvinylether ND 10 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 1,1,2- Trichlorotrifluoroethane ND 1 ug/L 5030B 12/07/18:214997 8260B 12/07/18:218564 ND=Non-Detected.PQL=Practical Quantitation Limit.$Surrogate.*PQL adjusted for dilution. • • Page 12 of 43 e e:.i v ..'Y.,r.v ...., ..Y,.,. :..�.:i. ,♦..:s,.ru4.kZ>. ,{�..;. .....: T... ,...+•.,n.. a:. 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December 26, 2018 Lab ID : SP 1815814-003 Customer ID-- : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On :November 28, 2018-08:00 South Lake Tahoe, CA 96150 Sampled By : OPS/US/BC Received On : November 30, 2018-11:58 Matrix : Waste Water Description : Raw Influent WW-01 Project : EPA Pripority Pollutants AG64320 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8081 Tetrachloro-m-xylene$ 13.2 15-143 % 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Aldrin ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Alpha BHC ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Beta BHC ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Delta BHC ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Gamma BHC(Lindane) ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Chlordane ND 0.1 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 alpha-Chlordane ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 gamma-Chlordane ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 4,4-DDD ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217870 4,4-DDE ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 . 4,4-DDT ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Dieldrin ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Endosulfan I ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Endosulfan II ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Endosulfan Sulfate, ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Endrin ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Endrin Aldehyde ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Endrin Ketone ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Heptachlor ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Heptachlor Epoxide ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Methoxychlor ND 0.1 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Toxaphene ND 0.5 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 EPA 8082 Tetrach1oro-m-xylene$ 13.4 26-102 % 8082A 12/04/18:214234 8082 12/07/18:217811 PCB 1016/1242 ND 0.5 ug/L 8082A 12/04/18:214234 8082 12/07/18:217811 PCB 1221 ND 0.5 ug/L 8082A 12/04/18:214234 8082 12/07/18:217811 PCB 1232 ND 0.5 ug/L 8082A 12/04/18:214234 8082 12/07/18:217811 PCB 1248 ND 0.5 ug/L 8082A 12/04/18:214234 8082 12/07/18:217811 PCB 1254 ND 0.5 ug/L 8082A 12/04/18:214234 8082 12/07/18:217811 PCB 1260 ND 0.5 ug/L 8082A 12/04/18:214234 8082 12/07/18:217811 i PCB 1242 ND 0.5 ug/L 8082A 12/04/18:214234 8082 12/07/18:217811 EPA 8270 2-Fluorobiphenyl$ 44.8 26-97* % 3520 12/05/18:214308 8270C 12/17/18:218365 2-Fluorophenol$ 50.7 0-114* % 3520 12/05/18:214308 8270C 12/17/18:218365 Page 13 of 43 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 December 26, 2018 Lab ID : SP 1815814-003 Description : Raw Influent WW-01 Customer ID : 2-11369 Sample Result-Organic Constituent Result PQL Units Note Sample Preparation- Sample Analysis Method Date/ID Method Date/ID EPA 8270 Nitrobenzene-d51 51.3 22-92* % 3520 12/05/18:214308 8270C 12/17/18:218365 Phenol-d6I , 49.1 0-105* % 3520 12/05/18:214308 8270C 12/17/18:218365 p-Terphenyl-d14I 12.0 20-118* % 3520 'i;,.. 12/05/18:214308 8270C 12/17/18:218365 2,4,6-Tribromophenol$ 49.5 0-133* % 3520 12/05/18:214308 8270C 12/17/18:218365 Acenaphthene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Acenaphthylene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Aniline ND 9.4*. ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Anthracene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 1,2-Diphenylhydrazine ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Benzidine ND 3.7* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Benzo(a)anthracene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Benzo(b)fluoranthene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Benzo(k)fluoranthene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Benzo(g,h,i)perylene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Benzo(a)pyrene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Benzoic Acid 719 120* ug/L 3520 12/05/18:214308 8270C 12/18/18:218435 1 Benzylalcohol 20.7 9.4* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 I 4-Bromophenylphenylether ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Butylbenzylphthalate ND 3.7* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 bis(2- . Chloroethoxy)lnethane ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 bis(2-Chloroethyl)ether ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 bis(2-Chloroisopropyl)ether ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 bis(2-Ethylhexyl)phthalate ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 4-Chloroaniline ND 9.4* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 4-Chloro-3-methylphenol ND 3.7* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 2-Chloronaphthalene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 2-Chlorophenol ND 3.7* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 4-Chlorophenylphenylether ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Chrysene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Dibenzo(a,h)anthracene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Dibenzofuran ND 9.4* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Di-n-butylphthalate ND 3.7* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 1,2-Dichlorobenzene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 1,3-Dichlorobenzene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 1,4-Dichlorobenzene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 3,3'-Dichlorobenzidine ND 3.7* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 2,4-Dichlorophenol ND 3.7* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Diethylphthalate ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 1 r Page 14 of 43 December 26, 2018 Lab ID : SP 1815814-003 Description : Raw Influent WW-01 Customer ID : 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8270 2,4-Dimethylphenol ND 3.7* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Dimethylphthalate ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 4,6-Dinitro-2-methylphenol ND 3.7* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 2,4-Dinitrophenol ND 9.4* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 2,4-Dinitrotoluene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 2,6-Dinitrotoluene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Di-n-octylphthalate ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Fluoranthene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Fluorene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Hexachlorobenzene ND 1.9* ug/L 3520 ;i,' 12/05/18:214308 8270C 12/17/18:218365 Hexachlorobutadiene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Hexachlorocyclopentadiene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Hexachloroethane ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Indeno(1,2,3-c,d)pyrene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Isophorone ND 19* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 2-Methylnaphthalene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 2-Methylphenol ND 3.7* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 3-and 4-Methylphenol 58.2 3.7* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Naphthalene ' ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 2-NitroanalineND 9.4* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 3-Nitroanaline ND 9.4* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 4-Nitroanaline ND 9.4* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Nitrobenzene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 2-Nitrophenol ND 3.7* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 4-Nitrophenol ND 9.4* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 N-Nitrosodimethylamine ND 3.7* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 N-Nitrosodiphenylamine . ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 N-Nitrosodi-n-propylalnine ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Pentachlorophenol ND 9.4* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Phenanthrene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Phenol 33.4 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Pyrene ND 1.9* ug/L 3520 r 12/05/18:214308 8270C 12/17/18:218365 1,2,4-Trichlorobenzene ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 2,4,5-Trichlorophenol ND 3.7* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 2,4,6-Trichlorophenol ND" 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Pyridine ND 1.9* ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 ND=Non-Detected.PQL=Practical Quantitation Limit.$Surrogate.*PQL adjusted for dilution. • Page 15 of 43 x < .. .Y, ....i .: ... -,,,,A;;;,,,;.' :u..'... .. x,: , ...:" .,kv :.: 5 v , . ..Ja# '.k- ,.. .y T.s..,.>•. va..> h..•......,+. ,,,c,.. ..z .,,s .F . .::...hY «. 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December 26, 2018 Lab ID : SP 1815814-004 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : November 28, 2018-08:00 South Lake Tahoe, CA 96150 Sampled By : OPS/US/BC Received On : November 30, 2018-11:58 Matrix : Waste Water Description : Final Effluent WW-04 Project : EPA Pripority Pollutants AG64323 Sample Result- Organic • Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID , EPA 8081 Tetrachloro-m-xylenes 15.3 15-143 % 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Aldrin ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Alpha BHC ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Beta BHC ND ' 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Delta BHC ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Gamma BHC(Lindane) ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Chlordane ND 0.1 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 alpha-Chlordane ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 gamma-Chlordane ND / 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 4,4-DDD ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217870 4,4-DDE ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 4,4-DDT ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Dieldrin ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Endosulfan I ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Endosulfan II ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Endosulfan Sulfate ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Endrin ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 . Endrin Aldehyde ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Endrin Ketone ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Heptachlor ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Heptachlor Epoxide ND 0.05 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Methoxychlor ND 0.1 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 Toxaphene ND 0.5 ug/L 608/8081 12/03/18:214169 608/8081 12/06/18:217732 EPA 8082 Tetrachloro-m-xylene 33.1 26-102 % 8082A 12/04/18:214234 8082 12/07/18:217811 PCB 1016/1242 ND 0.5 ug/L 8082A 12/04/18:214234 8082 12/07/18:217811 PCB 1221 ND 0.5 ug/L 8082A 12/04/18:214234 8082 12/07/18:217811 PCB 1232 ND 0.5 ug/L 8082A 12/04/18:214234 8082 12/07/18:217811 PCB 1248 ND 0.5 ug/L 8082A 12/04/18:214234 8082 12/07/18:217811 PCB 1254 ND 0.5 ug/L 8082A 12/04/18:214234 8082 12/07/18:217811 PCB 1260 ND 0.5 ug/L 8082A 12/04/18:214234 8082 12/07/18:217811 PCB 1242 ND 0.5 ug/L 8082A. 12/04/18:214234 8082 12/07/18:217811 EPA 8270 2-Fluorobiphenyl 53.3 26-97 % 3520 12/05/18:214308 8270C 12/17/18:218365 2-Fluorophenol$ 35.3 0-114 % 3520 12/05/18:214308 8270C 12/17/18:218365 Page 16 of 43 Corporate Offices&Laboratory , Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 December 26, 2018 Lab ID : SP 1815814-004 Description : Final Effluent WW-04 Customer ID : 2-11369 Sample Result-Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8270 Nitrobenzene-d51 53.1 22-92 % 3520 12/05/18:214308 8270C 12/17/18:218365 Pheno1-d61 22.7 0-105 % 3520 12/05/18:214308 8270C 12/17/18:218365 p-Terphenyl-d141 16.9 20-118 % 3520 12/05/18:214308 8270C 12/17/18:218365 2,4,6-Tribrolnophenol$ 58.3 0-133 % 3520 12/05/18:214308 8270C 12/17/18:218365 Acenaphthene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Acenaphthylene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Aniline ND 5 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Anthracene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 1,2-Diphenylhydrazine ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Benzidine ND 2 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Benzo(a)anthracene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Benzo(b)fluoranthene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Benzo(k)fluoranthene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Benzo(g,h,i)perylene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Benzo(a)pyrene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Benzoic Acid 5 5 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Benzylalcohol ND 5 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 4-Bromophenylphenylether ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Butylbenzylphthalate ND 2 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 bis(2- ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Chloroethoxy)inethane bis(2-Chloroethyl)ether ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 bis(2-Chloroisopropyl)ether ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 bis(2-Ethylhexyl)phthalate ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 4-Chloroaniline ND 5 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 4-Chloro-3-methylphenol ND 2 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 2-Chloronaphthalene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 2-Chlorophenol ND 2 ug/L 3520 , 12/05/18:214308 8270C 12/17/18:218365 4-Chlorophenylphenylether ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Chrysene ND 1 ug/L 3520 12/05/18:2.14308 8270C 12/17/18:218365 Dibenzo(a,h)anthracene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Dibenzofuran ND 5 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Di-n-butylphthalate ND 2 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 1,2-Dichlorobenzene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 1,3-Dichlorobenzene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 1,4-Dichlorobenzene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 3,3'-Dichlorobenzidine ND 2 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 2,4-Dichlorophenol ND 2 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Diethylphthalate ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Page 17 of 43 , December 26, 2018 Lab ID :'SP 1815814-004 Description : Final Effluent WW-04 Customer ID : 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Methods Date/ID Method Date/ID EPA 8270 2,4-Dimethylphenol ND 2 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Dimethylphthalate ND 1 ug/L • 3520 12/05/18:214308 8270C 12/17/18:218365 4,6-Dinitro-2-methylphenol ND 2 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 2,4-Dinitrophenol ND 5 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 2,4-Dinitrotoluene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 2,6-Dinitrotoluene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Di-n-octylphthalate ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Fluoranthene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 , Fluorene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Hexachlorobenzene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Hexachlorobutadiene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Hexachlorocyclopentadiene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Hexachloroethane ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Indeno(1,2,3-c,d)pyrene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Isophorone ND 10 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 2-Methylnaphthalene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 2-Methylphenol ND 2 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 3-and 4-Methylphenol ND 2 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Naphthalene ND 1 ug/L3520 12/05/18:214308 8270C 12/17/18:218365 2-Nitroanaline ND 5 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 3-Nitroanaline ND 5 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 4-Nitroanaline ND 5 ug/L 3520 12/05/18:214308. 8270C 12/17/18:218365 Nitrobenzene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 2-Nitrophenol ND 2 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 4-Nitrophenol ND 5 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 N-Nitrosodimethylamine ND 2 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 N-Nitrosodiphenylamine ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 N-Nitrosodi-n-propylamine ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Pentachlorophenol ND 5 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Phenanthrene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Phenol ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 Pyrene ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 , 1,2,4-Trichlorobenzene , ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 2,4,5-Trichlorophenol ND 2 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 • 2,4,6-Trichlorophenol ND 1 ug/L 3520 '12/05/18:214308 8270C 12/17/18:218365 Pyridine ND 1 ug/L 3520 12/05/18:214308 8270C 12/17/18:218365 , ND=Non-Detected.PQL=Practical Quantitation Limit.$Surrogate.*PQL adjusted for dilution. 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December 26, 2018 Lab ID : SP 1815814-005 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : November 29, 2018-11:00 South Lake Tahoe, CA 96150 Sampled By : OPS/US/BC Received On : November 30, 2018-11:58 Matrix : Solid Description : Centrifuge Cake Project : EPA Pripority Pollutants AG64325 Sample Result-Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID' EPA 8260 4-Bromofluorobenzenet 120 69-130* % 5030B 12/07/18:214998 8260B 12/07/18:218564 Dibroinofluoromethane$ 128 50-162* % 5030B 12/07/18:214998 8260B 12/07/18:218564 1,2-Dichloroethane-d4I 123 59-166* % 5030B 12/07/18:214998 8260B 12/07/18:218564 Toluene-d81 98.0 66-143* % 5030B 12/07/18:214998 8260B 12/07/18:218564 Acetone 97300 1200* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Acrolein ND 1500* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Acrylonitrile ND 1500* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Benzene ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Bromobenzene ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Bromochloromethane ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Bromodichloromethane ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Bromoform ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Bromomethane ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 tert-Butanol ND 1200* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 2-Butanone(MEK) 59000 1200* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 n-Butylbenzene ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 sec-Butylbenzene ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 tert-Butylbenzene ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Carbon Disulfide ND 1200* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Carbon Tetrachloride ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Chlorobenzene ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Chloroethane ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Chloroform ' ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Chloromethane ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 2-Chlorotoluene ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 4-Chlorotoluene ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Dibromochloromethane ND 250* ug/kg 5030B 12/07/18:214998 82608 12/07/18:218564 Dibromomethane ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 1,2-Dichlorobenzene ND 250* ug/kg 5030B 12/07/18:214998 8260E 12/07/18:218564 1,3-Dichlorobenzene ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 1,4-Dichlorobenzene ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Dichlorodifluoromethane ND 250* ug/kg ` 5030B 12/07/18:214998 8260B 12/07/18:218564 1,1-Dichloroethane ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 1,2-Dichloroethane ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 1,1-Dichloroethylene ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Page 19 of 43 , Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 . TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 December 26, 2018 Lab ID : SP 1815814-005 Description : Centrifuge Cake Customer ID : 2-11369 Sample Result- Organic . Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 . cis-1,2-Dichloroethylene , ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 i trans-1,2-Dichloroethylene ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 1,2-Dichloropropane ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 1,3-Dichloropropane ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 2,2-Dichloropropane ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 1,1-Dichloropropene ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 . Di-isopropyl ether(DIPE) ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Ethyl Benzene ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Ethyl tert-butyl ether (ETBE) ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Hexachlorobutadiene ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 2-Hexanone ND 1200* ug/kg 5030B •12/07/18:214998 8260B 12/07/18:218564 Isopropylbenzene ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 p-Isopropyltoluene 400 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Methyl tert-butyl ether (MTBE) ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 4-Methyl-2-pentanone ND 1200* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 (MIRK) Methylene Chloride ND 1200* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Naphthalene ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 n-Propylbenzene ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Styrene ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 tent-Amyl methyl ether ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 (TAME) 1,1,1,2-Tetrachloroethane ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 1,1,2,2-Tetrachloroethane ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Tetrachloroethylene ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Toluene 1190 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 1,2,3-Trichlorobenzene ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 1,2,4-Trichlorobenzene ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 1,1,1-Trichloroethane ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 1,1,2-Trichloroethane ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Trichloroethylene ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Trichlorofluoromethane ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 1,2,4-Trimethylbenzene ND 250* . ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 1,3,5-Trimethylbenzene ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Vinyl Acetate ND 1200* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Vinyl Chloride ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Xylenes ND -- ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Xylenes m,p ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Xylenes o ND 250* ug/kg 5030B 12/07/18:214998 8260B 12/07/18:218564 Page 20 of 43 December 26, 2018 Lab ID : SP 1815814-005 Description : Centrifuge Cake Customer ID : 2-11369 Sample Result-Organic . Constituent Result . PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8270 2-Fluorobipheny11 82.7 0-106* % 8270C 12/13/18:214636 8270C 12/18/18:218435 2-FluorophenolI 86.0 0-115* % 8270C 12/13/18:214636 8270C 12/18/18:218435 Nitrobenzene-d51 80.6 - 0-151* % 8270C 12/13/18:214636 8270C 12/18/18:218435 Phenol-d61 88.3 0-124* % 8270C 12/13/18:214636 8270C 12/18/18:218435 . p-Terphenyl-d141 55.7 0-101* % 8270C 12/13/18:214636 8270C 12/18/18:218435 2,4,6-TribromophenolI 100 0-129* % 8270C 12/13/18:214636 8270C 12/18/18:218435 Acenaphthene ND 5* - mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Acenaphthylene ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Aniline ND 10* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Anthracene ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 1,2-Diphenylhydrazine ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Benzidine ND 10* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Benzo(a)anthracene ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 , Benzo(b)fluoranthene ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Benzo(k)fluoranthene ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Benzo(g,h,i)perylene ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Benzo(a)pyrene ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Benzoic Acid ND 10* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 r Benzylalcohol ND 10* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 4-Bromophenylphenylether ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Butylbenzylphthalate ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 bis(2- Chloroethoxy)methane ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 bis(2-Chloroethyl)ether ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 bis(2-Chloroisopropyl)ether ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 bis(2-Ethylhexyl)phthalate ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 4-Chloroaniline ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 4-Chloro-3-methylphenol ND 10* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 2-Chloronaphthalene ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 2-Chlorophenol ND 10* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 4-Chlorophenylphenylether ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Chrysene ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Dibenzo(a,h)anthracene ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Dibenzofuran ND 10* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Di-n-butylphthalate ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 1,2-Dichlorobenzene ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 1,3-Dichlorobenzene ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 1,4-Dichlorobenzene ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 3,31-Dichlorobenzidine ND 5* mg/kg 8270C 12/13/18:214636 8270c 12/18/18:218435 Page 21 of 43 i • December 26, 2018 Lab ID : SP 1815814-005 Description : Centrifuge Cake Customer ID : 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis • Method Date/ID Method Date/ID EPA 8270 2,4-Dichlorophenol ND 10* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Diethylphthalate ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 2,4-Dimethylphenol ND 10* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Dimethylphthalate ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 4,6-Dinitro-2-methylphenol ND 10* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 2,4-Dinitrophenol ND 10* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 2,4-Dinitrotoluene ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 2,6-Dinitrotoluene ND 5* nag/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Di-n-octylphthalate ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Fluoranthene ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Fluorene ND 5* , mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Hexachlorobenzene ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Hexachlorobutadiene ND 5* , mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Hexachlorocyclopentadiene ND . 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Hexachloroethane ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Indeno(1,2,3-c,d)pyrene ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Isophorone ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 2-Methylnaphthalene ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 2-Methylphenol ND 10* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 3-and 4-Methylphenol 10 10* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Naphthalene ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 2-Nitroanaline ND 10* 'mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 3-Nitroanaline ND 10* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 4-Nitroanaline ND ,10* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Nitrobenzene ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 2-Nitrophenol ND 10* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 4-Nitrophenol ND 10* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 N-Nitrosodimethylalnine ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 N-Nitrosodiphenylamine ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 N-Nitrosodi-n-propylamine ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Pentachlorophenol ND 10* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Phenanthrene ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Phenol ND 10* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Pyrene ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 1,2,4-Trichlorobenzene- ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 2,4,5-Trichlorophenol ND 10* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 2,4,6-Trichlorophenol ND 10* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 Pyridine ND 5* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 ) Page 22 of 43 December 26, 2018 Lab ID : SP 1815814-005 Description : Centrifuge Cake Customer ID : 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8270 2,3,4,6-Tetrachlorophenol ND 10* mg/kg 8270C 12/13/18:214636 8270C 12/18/18:218435 ND=Non-Detected.PQL=Practical Quantitation Limit.$Surrogate.*PQL adjusted for dilution. 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December 26, 2018 Lab ID : SP 1815814 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Conc. QC Data DQO Note Organic 1,2,4-Trichlorobenzene 3520 12/05/18:214308caa Blank ug/L ND <1 LCS ug/L 10.00 90.0% 2-121 BS ug/L 10.00 89.0% 6-93 BSD ug/L 10.00 88.0% 6-93 BSRPD ug/L 10.00 1.1% <_44 / 1,2-Dichlorobenzene 3520 12/05/18:214308caa Blank ug/L ND <1 1,2-Diphenylhydrazine 3520 12/05/18:214308caa Blank ug/L ND <1 1,3-Dichlorobenzene 3520 12/05/18:214308caa Blank ug/L ND <1 1,4-Dichlorobenzene 3520 12/05/18:214308caa Blank ug/L ND <1 LCS ug/L 10.00 85.3% 1-112 BS ug/L 10.00 83.1% 7-75 436 BSD ug/L 10.00 83.3% 7-75 436 BSRPD ug/L 10.00 0.3% <_39 2,4,5-Trichlorophenol 3520 12/05/18:214308caa Blank ug/L ND <2 2,4,6-Tribromophenol 3520 12/05/18:214308caa Blank ug/L 20.00 67.4% 0-133 LCS ug/L 20.00 82.7% 0-133 BS ug/L 20.00 80.6% N/A BSD ug/L 20.00 76.8% N/A BSRPD ug/L 10.00 4.9% <l9 2,4,6-Trichlorophenol 3520 12/05/18:214308caa Blank ug/L ND <1 2,4-Dichlorophenol 3520 12/05/18:214308caa Blank ug/L ND <2 2,4-Dimethylphenol 3520 12/05/18:214308caa Blank ug/L ND <2 2,4-Dinitrophenol 3520 12/05/18:214308caa Blank ug/L ND <5 2,4-Dinitrotoluene 3520 12/05/18:214308caa Blank ug/L ND <1 LCS ug/L 10.00 85.8% 26-107 BS ug/L 10.00 85.2% 0-120 BSD ug/L 10.00 84.4% 0-120 BSRPD ug/L 10.00 0.9% <_29 2,6-Dinitrotoluene 3520 12/05/18:214308caa Blank ug/L ND <1 2-Chlorophenol 3520. 12/05/18:214308caa Blank ug/L ND <2 LCS ug/L 20.00 89.6% 10-110 BS ug/L 20.00 90.1% 2-83 436 BSD ug/L 20.00 91.3% 2-83 436 BSRPD ug/L 10.00 1.3% <54 2-Fluorobiphenyl 3520 12/05/18:214308caa Blank ug/L 10.00 71.7% 26-97 ' LCS ug/L 10.00 78.8% 26-97 BS ug/L 10.00 77.6% 30-115 BSD ug/L 10.00 74.9% 30-115 BSRPD ug/L 10.00 3.5% <_35 2-Fluorophenol 3520 12/05/18:214308caa Blank ug/L 20.00 71.1% 0-114 LCS ug/L 20.00 72.8% 0-114 BS ug/L 20.00 73.4% N/A BSD ug/L 20.00 72.6% N/A BSRPD ug/L 10.00 1.1% <_41 2-Methylnaphthalene 3520 12/05/18:214308caa Blank ug/L ND <1 2-Methylphenol 3520 12/05/18:214308caa Blank ug/L ND <2 2-Nitroaniline 3520 12/05/18:214308caa Blank ug/L ND <5 2-Nitrophenol 3520 12/05/18:214308caa Blank ug/L ND <2 3,3-Dichlorobenzidine 3520 12/05/18:214308caa Blank ug/L ND <2 3-Nitroaniline 3520 12/05/18:214308caa Blank ug/L ND <5 4,6-Dinitro-2-methylphenol 3520 12/05/18:214308caa Blank ug/L ND <2 4-Bromophenylphenylether 3520 12/05/18:21.4308caa Blank ug/L ND <1 4-Chloro-3-methylphenol 3520 12/05/18:214308caa Blank ug/L ND <2 LCS ug/L 20.00 96.6% 19-103 BS ug/L 20.00 96.5% 18-95 436 Page 24 of 43 • Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 / A. December 26, 2018 Lab ID : SP 1815814 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Conc. QC Data DQO Note Organic / 4-Chloro-3-methylphenol 3520 12/05/18:214308caa BSD ug/L 20.00 93.6% 18-95 BSRPD ug/L 10.00 3.1% _<37 4-Chloroaniline 3520 12/05/18:214308caa Blank ug/L ND <5 4-Methylphenol 3520 12/05/18:214308caa Blank ug/L ND <2 4-Nitroaniline 3520 12/05/18:214308caa Blank ug/L ND <5 4-Nitrophenol 3520 12/05/18:214308caa Blank ug/L ND <5 LCS ug/L 20.00 82.6% 0-119 BS ug/L 20.00 76.7% 0-34 436 BSD ug/L ' 20.00 81.1% 0-34 436 BSRPD ug/L 10.00 0.87 <5 Acenaphthene 3520 l2/05/18:214308caa Blank ug/L ND <1 LCS ug/L 10.00 91.8% 15-115 BS ug/L 10.00 90.2% 8-100 f BSD ug/L 10.00 89.4% 8-100 BSRPD ug/L 10.00 0.8% <39 Acenaphthylene 3520 12/05/18:214308caa Blank ug/L ND <1 Aniline 3520 12/05/18:214308caa Blank ug/L ND <5 Anthracene 3520 12/05/18:214308caa Blank ug/L ND <1 Benzidine 3520 12/05/18:214308caa Blank ug/L ND. <2 Benzo(a)anthracene 3520 12/05/18:214308caa Blank ug/L ND <1 Benzo(a)pyrene 3520 12/05/18:214308caa Blank ug/L ND <1 Benzo(b)fluoranthene 3520 12/05/18:214308caa Blank ug/L ND <1 Benzo(g,h,i)perylene 3520 12/05/18:214308caa Blank ug/L ND <1 Benzo(k)fluoranthene 3520 12/05/18:214308caa Blank ug/L ND <1 Benzoic Acid 3520 12/05/18:214308caa Blank ug/L ND <5 Benzylalcohol 3520 12/05/18:214308caa Blank ug/L ND <5 bis(2-Chloroethoxy)methane 3520 12/05/18:214308caa Blank ug/L ND <1 bis(2-Chloroethyl)ether 3520 12/05/18:214308caa Blank ug/L ND <1 bis(2-Chloroisopropyl)ether 3520 12/05/18:214308caa Blank ug/L ND <1 bis(2-Ethylhexyl)phthalate 3520 12/05/18:214308caa Blank ug/L ND <1 Butylbenzylphthalate 3520 12/05/18:214308caa Blank ug/L ND <2 Chloronaphthalene 3520 12/05/18:214308caa Blank ug/L ND <1 Chlorophenylphenylether 3520 12/05/18:214308caa Blank ug/L ND <1 Chrysene 3520 12/05/18:214308caa Blank ug/L ND <1 Dibenzo(a,h)anthracene 3520 12/05/18:214308caa Blank ug/L ND <1 Dibenzofuran 3520 12/05/18:214308caa Blank ug/L ND <5 Diethylphthalate 3520 12/05/18:214308caa Blank ug/L ND <1 Dimethylphthalate 3520 12/05/18:214308caa Blank ug/L ND <1 Di-n-butylphthalate 3520 12/05/18:214308caa Blank ug/L ND <2 Di-n-octylphthalate 3520 12/05/18:214308caa Blank ug/L ND <1 Fluoranthene 3520 12/05/18:214308caa Blank ug/L , ND <1 Fluorene 3520 12/05/18:214308caa Blank ug/L ND <1 Hexachlorobenzene 3520 12/05/18:214308caa Blank ug/L ND <1 Hexachlorobutadiene 3520 - 12/05/18:214308caa Blank ug/L ND <1 Hexachlorocyclopentadiene 3520 12/05/18:214308caa Blank ug/L ND <1 Hexachloroethane 3520 12/05/18:214308caa Blank ug/L ND <1 Indeno(1,2,3-c,d)pyrene 3520 12/05/18:214308caa Blank ug/L ND <1 Isophorone 3520 12/05/18:214308caa Blank ug/L ND <10 Naphthalene 3520 12/05/18:214308caa Blank ug/L ND <1 Nitrobenzene 3520 12/05/18:214308caa Blank ug/L ND <1 Nitrobenzene-d5 3520 12/05/18:214308caa Blank ug/L 10.00 74.1% 22-92 LCS ug/L 10.00 82.0% 22-92 BS ug/L 10.00 83.1% N/A BSD ug/L 10.00 81.1% N/A Page 25 of 43 December 26, 2018 Lab ID : SP 1815814 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Conc. QC Data DQO Note Organic Nitrobenzene`d5 3520 12/05/18:214308caa BSRPD ug/L 10.00 2.5% _<35 N-Nitrosodimethylamine 3520 12/05/18:214308caa Blank ug/L ND <2 N-Nitrosodi-N-propylamine 3520 12/05/18:214308caa Blank ug/L ND <1 LCS ug/L 10.00 92.7% 0-142 BS ug/L 10.00 86.9% 11-94 BSD ug/L 10.00 89.5% 11-94 BSRPD ug/L 10.00 3.0% _<38 N-Nitrosodiphenylamine 3520 12/05/18:214308caa Blank ug/L ND <1 Pentachlorophenol 3520 12/05/18:214308caa Blank ug/L ND <5 _ LCS ug/L 20.00 89.3% 24-102 BS ug/L 20.00 81.3% 9-135 BSD ug/L 20.00 82.5% 9-135 BSRPD ug/L 10.00 0.24 <5 Phenanthrene 3520 12/05/18:214308caa Blank ug/L ND <1 Phenol 3520 12/05/18:214308caa Blank ug/L ND <1 LCS ug/L 20.00 84.4% 0-127 BS ug/L 20.00 84.0% 6-37 436 BSD ug/L 20.00 86.9% 6-37 436 BSRPD ug/L 10.00 3.4% <_89 Phenol-d6 3520 12/05/18:214308caa Blank ug/L 20.00 70.2% 0-105 LCS ug/L 20.00 75.0% 0-105 BS ug/L 20.00 74.2% N/A BSD ug/L 20.00 74.7% N/A BSRPD ug/L 10.00 0.7% <_51 p-Terphenyl-d14 3520 12/05/18:214308caa Blank ug/L 10.00 45.1% 20-118 LCS ug/L 10.00 50.9% 20-118 BS ug/L 10.00 49.1% N/A BSD ug/L 10.00 48.0% N/A BSRPD ug/L 10.00 0.11 <1 Pyrene 3520 12/05/18:214308caa Blank ug/L ND <1 LCS ug/L 10.00 113% 45-106 310 J BS ug/L 10.00 109% 22-95 436 BSD ug/L 10.00 111% 22-95 436 BSRPD ug/L 10.00 2.0% _<40 Pyridine 3520 12/05/18:214308caa Blank ug/L ND <1 1,1,1,2-Tetrachloroethane 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 1,1,1-Trichloroethane(TCA) 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 1,1,2,2-Tetrachloroethane 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 1,1,2-Trichloroethane 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 1,1,2-Trichlorotrifluoroethane 5030B 12/07/18:214997VRG Blank ug/L ND <1 ExBlk ug/L 0.00 25 1,1-Dichloroethane 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 1,1-Dichloroethylene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 Page 26 of 43 December 26, 2018 Lab ID : SP 1815814 South Tahoe Public Utility District Customer : 2-11369 • Quality Control- Organic Constituent Method Date/ID Type Units Conc. QC Data DQO Note rd.:. Organic '' 1,1-Dichloroethylene 5030B 12/07/18:214997VRG LCS ug/L 25.00 64.5% 52-137 MS ug/L 25.00 75.5% 25-179 (SP 1815814-002) MSD ug/L 25.00 91.8% 25-179 MSRPD ug/L 25.00 19.5% <_26 5030B 12/07/18:214998VRG Blank ug/kg ND <250 LCS ug/kg 1562 40.9% 0-135 MS ug/kg 1562 43.7% 0-251 (STK1857178-001) MSD ug/kg 1562 40.5% 0-251 MSRPD ug/kg 1250 7.7% <_38.1 1,1-Dichloropropene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk - ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 _ 1,2,3-Trichlorobenzene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 1,2,3-Trichloropropane 5030B 12/07/18:214997VRG Blank ug/L ND "<1 ExBlk ug/L 0.00 25 1,2,4-Trichlorobenzene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 1,2,4-Trimethylbenzene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 1,2-Dichlorobenzene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 • 5030B 12/07/18:214998VRG Blank ug/kg ND <250 1,2-Dichloroethane(EDC) 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 1,2-Dichloroethane-d4 5030B 12/07/18:214997VRG Blank ug/L 25.00 97.6% 58-144 ExBlk ug/L 0.0% N/A LCS ug/L 25.00 96.3% 58-144 MS ug/L 25.00 107% 58-144 (SP 1815814-002) MSD ug/L 25.00 105% 58-144 MSRPD ug/L 25.00 1.8% <20.0 5030B 12/07/18:214998VRG Blank ug/kg 1250 146% 59-166 LCS ug/kg 1250 130% 59-166 MS ug/kg 1250 125% 48-123 435 (STK1857178-001) MSD ug/kg 1250 117% 48-123 MSRPD ug/kg 1250 6.9% <20.0 1,2-Dichloropropane 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 1,3,5-Trimethylbenzene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 1,3-Dichlorobenzene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 1,3-Dichloropropane 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L `, ' 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 1,4-Dichlorobenzene 5030B 12/07/18:214997VRG Blank , ug/L ND <0.5 ExBlk ug/L 0.000 12.5 Page 27 of 43 December 26, 2018 Lab ID : SP 1815814 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Conc. QC Data DQO Note Organic 1,4-Dichlorobenzene 5030B 12/07/18:214998VRG Blank ug/kg ND <250 1,4-Dioxane 5030B 12/07/18:214997VRG Blank ug/L ND <200 ExBlk ug/L 0 5000 2,2-Dichloropropane 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 2-Butanone(MEK) 5030B 12/07/18:214997VRG Blank ug/L ND <10 ExBlk ug/Li,:.: 0.0 250 5030B 12/07/18:214998VRG Blank ug/kg1.4 ND <1250. 2-Chloroethylvinyl ether 5030B 12/07/18:214997VRG Blank ug/L ND <10 ExBlk ug/L 0.0 250 2-Chlorotoluene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 2-Hexanone 5030B 12/07/18:214997VRG Blank ug/L ND <10 ExBlk ug/L 0.0 250 5030B 12/07/18:214998VRG Blank ug/kg ND <1250 4-Bromofluorobenzene 5030B 12/07/18:214997VRG Blank ug/L 25.00 98.7% 78-123 ExBlk ug/L 0.0% N/A LCS ug/L 25.00 94.9% 78-123 MS ug/L 25.00 98.5% 78-123 (SP 1815814-002) MSD ug/L 25.00 99.9% 78-123 MSRPD ug/L 25.00 1.4% _<20.0 5030B 12/07/18:214998VRG Blank ug/kg 1250 124% 69-130 LCS ug/kg 1250 124% 69-130 MS ug/kg 1250 114% 48-110 435 (5TK1857178-001) MSD ug/kg 1250 108% 48-110 MSRPD ug/kg 1250 5.4% <20.0 4-Chlorotoluene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 4-Methyl-2-pentanone(M1BK) 5030B 12/07/18:214997VRG Blank ug/L ND <10 ExBlk ug/L 0.0 250 5030B l'2/07/18:214998VRG Blank ug/kg ND <1250 • Acetone 5030B 12/07/18:214997VRG Blank ug/L ND <50 ' ExBlk ug/L 0.0 1250 5030B 12/07/18:214998VRG Blank ug/kg ND <1250 Acrolein 5030B 12/07/18:214997VRG Blank ug/L ND <50 ExBlk ug/L 0.0 1250 5030B 12/07/18:214998VRG Blank ug/kg ND <1500 Acrylonitrile 5030B 12/07/18:214997VRG Blank ug/L ND <50 ExBlk ug/L 0.0 1250 5030B 12/07/18:214998VRG Blank ug/kg ND <1500 Benzene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 LCS ug/L 25.00 103% 60-134 MS ug/L 25.00 114% 47-169 (SP 1815814-002) MSD ug/L 25.00 140% 47-169 MSRPD ug/L 25.00 20.6% _<24 5030B 12/07/18:214998VRG Blank ug/kg ND <250 LCS ug/kg 1562 124% 77-164 MS ug/kg 1562 116% 21-162 (STK1857178-001) MSD ug/kg 1562 111% 21-1,62 MSRPD ug/kg 1250 4.7% <37.9 Page 28 of 43 , , 1 December 26, 2018 Lab ID : SP 1815 814 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Conc. QC Data DQO Note Organic Bromobenzene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND • <250' Bromochloromethane 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 Bromodichloromethane 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 Bromoform 5030B 12/07/18:214997VRG Blank ug/L ND <2 ExBlk ug/L 0.0 50 5030B 12/07/18:214998VRG Blank ug/kg ND <250 Bromomethane(Methyl Bromide) 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND i <250 Carbon Disulfide 5030B 12/07/18:214997VRG Blank ug/L ND <10 ExBlk ug/Lk•,'.::. 0.0 250 5030B 12/07/18:214998VRG Blank ug/kg'' ND <l250 Carbon Tetrachloride 5030B 12/07/18:214997VRG Blank ug/L ND <1 ExBlk ug/L 0.00 25 5030B 12/07/18:214998VRG Blank ug/kg ND <250 Chlorobenzene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 LCS ug/L 25.00 115% 56-152 MS ug/L 25.00 115% 31-212 (SP 1815814-002) MSD ug/L 25.00 154% 31-212 MSRPD ug/L 25.00 29.1% _<27 435 5030B 12/07/18:214998VRG Blank ug/kg ND <250 LCS ug/kg 1562 125% 86-185 MS ug/kg 1562 124% 18-165 (STK1857178-001) MSD ug/kg 1562 117% 18-165 MSRPD,. ug/kg 1250 5.2% <_40.3 Chloroethane(Ethyl Chloride) 5030B 12/07/18:214997VRG Blank ug/L ND <1 ExBlk • ug/L 0.00 25 5030B 12/07/18:214998VRG Blank ug/kg ND <250 Chloroform 5030B 12/07/18:214997VRG Blank ug/L ND <1 ExBlk ug/L 0.00 25 5030B 12/07/18:214998VRG Blank ug/kg ND <250 Chloromethane(Methyl Chloride) 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 cis-1,2-Dichloroethylene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 cis-1,3-Dichloropropene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 Dibromochloromethane 5030B 12/07/18:214997VRG Blank ug/L ND <2 ExBlk ug/L 0.0 50 5030B 12/07/18:214998VRG Blank ug/kg ND <250 Dibromofluromethane 5030B 12/07/18:214997VRG Blank ug/L 25.00 103% 65-125 ExBlk ug/L 0.0% N/A LCS ug/L 25.00 103% 65-125 • MS ug/L 25.00 101% 65-125 (SP 1815814-002) MSD ug/L 25.00 98.4% 65-125 Page 29 of 43 J December 26, 2018 Lab ID : SP 1815814 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Conc. QC Data DQO Note Organic Dibromofluromethane 5030B 12/07/18:214997VRG MSRPD ug/L„ 25.00 2.6% _<20.0 5030B 12/07/18:214998VRG Blank ug/kg 1250 146% 50-162 LCS ug/kg 1250 135% 50-162 MS ug/kg 1250 136% 48-132 435 (5TK1857178-001) MSD ug/kg 1250 125% 48-132 MSRPD ug/kg 1250 8.0% <_20.0 Dibromomethane 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 - Dichlorodifluoromethane 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 Dichloromethane 5030B 12/07/18:214997VRG Blank ug/L ND <2 ExBlk ug/L 69.1 50 210 5030B 12/07/18:214998VRG Blank ug/kg ND <1250 ' Ethyl tert-Butyl Ether 5030B 12/07/18:214997VRG Blank ug/L ND <2 ExBlk ug/L 0.0 50 5030B _12/07/18:214998VRG Blank ug/kg ND <250 Ethylbenzene. 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 Freon-11 5030B 12/07/18:214997VRG Blank ug/L., ND <1 ExBlk ug/Lj�:. 0.00 25 5030B 12/07/18:214998VRG Blank ug/kg'" ND <250 Hexachlorobutadiene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 Isopropyl Ether 5030B 12/07/18:214997VRG Blank ug/L ND <5 ExBlk ug/L 0.00 125 5030B 12/07/18:214998VRG Blank ug/kg ND <250 Isopropylbenzene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 Methyl tert-Butyl Ether(MTBE) 5030B 12/07/18:214997VRG Blank ug/L ND <2 ExBlk ug/L 0.0 50 5030B 12/07/18:214998VRG Blank ug/kg ND <250 Naphthalene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 • n-Butylbenzene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 n-Propylbenzene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 p-Isopropyltoluene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 sec-Butylbenzene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 Styrene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBIk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 Page 30 of 43 1 December 26, 2018 Lab ID : SP 1815814 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID ` Type Units Conc. QC Data DQO Note Organic TAME 5030B ,12/07/18:214997VRG Blank ug/L ND <5 ExBlk ug/L 0.00 125 5030B 12/07/18:214998VRG Blank ug/kg ND <250 tert-Butanol 5030B 12/07/18:214997VRG Blank ug/L ND <5 ExBlk ug/L 0.00 125 5030B 12/07/18:214998VRG Blank ug/kg ND <1250 tert-Butylbenzene 5030B ; 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 Tetrachloroethylene(PCE) 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 Toluene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 LCS ug/L 25.00 79.5% 56-131 MS ug/L 25.00 91.5% 44-164 (SP 1815814-002) MSD ug/L 25.00 107% 44-164 MSRPD ug/L 25.00 15.9% <_30 5030B 12/07/18:214998VRG Blank ug/kg ND <250 LCS ug/kg 1562 96.8% 88-160 MS ug/kg 1562 88.2% 22-171 (STK1857178-001) MSD ' ug/kg 1562 82.1% 22-171 MSRPD i ug/kg 1250 6.9% <_35.8 Toluene-d8 5030B 12/07/18:214997VRG Blank ug/L 25.00 92.8% 92-107 ExBlk ug/L 0.0% N/A LCS ug/L 25.00 92.4% 92-107 MS ug/L 25.00 94.9% 92-107 (SP 1815814-002) MSD ug/L 25.00 90.5% 92-107 435 MSRPD , ug/L 25.00 4.8% <_20 5030B 12/07/18:214998VRG Blank ug/kg 1250 109% 66-143 LCS ug/kg 1250 106% 66-143 MS ug/kg 1250 99.6% 49-124 (STK1857178-001) MSD ug/kg. 1250 90.7% 49-124 MSRPD . ug/kg; 1250 9.4% <_20.0 trans-1,2-Dichloroethylene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 trans-1,3-Dichloropropene 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk _ ug/L , 0.000 12.5 Trichloroethylene(TCE) 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 ExBlk ug/L 0.000 12.5 LCS ug/L 25.00 82.1% 61-123 MS ug/L 25.00 92.8% 41-167 (SP 1815814-002) MSD ug/L 25.00 111% 41-167 MSRPD ug/L 25.00 17.6% <32 5030B 12/07/18:214998VRG Blank ug/kg ND <250 LCS ug/kg 1562 99.7% 65-147 MS ug/kg 1562 91.8% 14-170 (STK1857178-001) MSD ug/kg 1562 86.8% 14-170 MSRPD ug/kg 1250 5.5% <44.7 Vinyl Acetate 5030B 12/07/18:214997VRG Blank ug/L ND <10 ExBlk ug/L 0.0 250 5030B 12/07/18:214998VRG Blank ug/kg ND <1250 Vinyl Chloride 5030B 12/07/18:214997VRG Blank ug/L ND <0.5 Page 31 of 43 December 26, 2018 Lab ID : SP 1815814 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Conc. QC Data DQO Note Organic Vinyl Chloride 5030B 12/07/18:214997VRG ExBlk` ug/L 0.000 12.5 5030B 12/07/18:214998VRG Blank ug/kg ND <250 Xylenes m,p 5030B 12/07/18:214997VRG Blank ug/L ND <2 ExBlk ug/L 0.0 50 5030B 12/07/18:214998VRG, Blank ug/kg ND <250 Xylenes o 5030B 12/07/18:214997VRG` Blank ug/L ND <2 I ExBlk ug/L 0.0 50 5030B 12/07/18:214998VRG Blank ug/kg ND <250 Aldrin 608/8081 12/03/18:214169caa Blank ug/L ND <0.05 LCS ug/L 0.5000 91.4% 38-122 BS ug/L 0.5000 43.9% 26-126 BSD ug/L 0.5000 52.5% 26-126 ' BSRPD ug/L 0.5005 0.043 <0.05 608/8081 12/06/18:217732SBL CCV ug/L 100.0 104% 85-115 CCV ug/L '50.00 94.9% 85-115 Alpha BHC 608/8081 12/03/18:214169caa Blank ug/L ND <0.05 LCS ug/L 0.5000 97.9% 43-119 BS ug/L 0.5000 46.0% 48-124 436 BSD ug/L 0.5000 51.6% 48-124 BSRPD ug/L 0.5005 0.028 _<0.05 608/8081 12/06/18:217732SBL CCV ug/L 100.0 113% 85-115 CCV ug/L 50.00 104% 85-115 alpha-Chlordane 608/8081 12/03/18:214169caa Blank ug/L ND <0.05 LCS ug/L 0.5000 95.0% 37-125 BS ug/L 0.5000 51.9% 35-124 ' BSD ug/L 0.5000 63.7% 35-124 BSRPD ug/L 0.5005 20.4% <_32 608/8081 12/06/18:217732SBL CCV ug/L 100.0 104% 85-115 . CCV ug/L 50.00 93.2% 85-115 Beta BHC 608/8081 12/03/18:214169caa Blank ug/L ND <0.05 LCS ug/L 0.5000 93.7% 35-124 BS ug/L 0.5000 46.5% 50-123 436 BSD ug/L 0.5000 53.8% 50-123 BSRPD ug/L 0.5005 14.3% <l5 608/8081 12/06/18:217732SBL CCV ug/L 100.0 102% 85-115 CCV ug/L 50.00 ' 86.7% 85-115 Chlordane 608/8081 12/03/18:214169caa Blank ug/L ND <0.1 DDD 608/8081 12/03/18:214169caa Blank ug/L ND <0.05 LCS ug/L 0.5000 101% 38-129 BS ug/L 0.5000 52.1% 32-130 BSD ug/L 0.5000 78.2% 32-130 BSRPD ug/L 0.5005 40.2% <37 410 DDE 608/8081 12/03/18:214169caa Blank u /L,, ND <0.05 ug/L1, LCS ug/J4.' 0.5000 97.6% 33-133 BS ' ug/L' 0.5000 50.9% 13-133 BSD ug/L 0.5000 64.1% 13-133 BSRPD ug/L 0.5005 22.8% <16 410 DDT 608/8081 12/03/18:214169caa Blank ug/L ND <0.05 LCS ug/L 0.5000 103% 45-127 BS ug/L 0.5000 49.5% 6-146 BSD ug/L 0.5000 61.9% 6-146 BSRPD ug/L 0.5005 22.2% _<16 410 Delta BHC 608/8081 12/03/18:214169caa Blank ug/L ND <0.05 LCS ug/L 0.5000 108% 38-132 Page 32 of 43 December 26, 2018 Lab ID : SP 1815814 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Conc. QC Data DQO Note Organic Delta BHC 608/8081 12/03/18:214169caa BS ug/L 0.5000 52.5% 45-132 BSD ug/L 0.5000 62.0% 45-132 BSRPD ug/L 0.5005 16.3% _<15 410 608/8081 12/06/18:217732SBL CCV ug/L 100.0 118% 85-115 360 CCV ug/L 50.00 105% 85-115 Dicofol 608/8081 12/03/18:214169caa Blank ug/L ND <0.05 LCS ug/L 1.000 50.5% 0-285 BS ug/L 1.000 8.1% 0-201 BSD ug/L 1.000 172% 0-201 BSRPD ug/L 0.5005 182% _<68 410 608/8081 12/06/18:217870SBL CCV ug/L 100.0 113% 85-115 CCV ug/L 50.00 273% 85-115 360 Dieldrin 608/8081 12/03/18:214169caa Blank ug/L ND <0.05 LCS ug/L 0.5000 93.7% 36-122 BS ug/L 0.5000 31.9% 49-118 436 BSD ug/L 0.5000 53.3% 49-118 BSRPD ug/L 0.5005 0.11 <0.05 410 608/8081 12/06/18:217732SBL CCV ug/L 100.0 100% 85-115 CCV ug/L 50.00 92.2% 85-115 Endosulfan I 608/8081 12/03/18:214169caa Blank ug/L ND <0.05 LCS ug/L 0.5000 93.9% 10-174 BS, ug/L 0.5000 49.1% 17-168 BSD ug/L 0.5000 36.1% 17-168 BSRPD ug/L 0.5005 0.065 <_0.05 410 608/8081 12/06/18:217732SBL CCV ug/L 100.0 103% 85-115 CCV ug/L 50.00 96.5% 85-115 Endosulfan II 608/8081 12/03/18:214169caa Blank ug/L ND . <0.05 LCS ug/L 0.5000 101% 0-241 BS ug/L 0.5000 53.9% 0-291 BSD ug/L 0.5000 26.3% 0-291 BSRPD ug/L 0.5005 0.14 <0.05 410 608/8081 12/06/18:217732SBL CCV ug/L 100.0 110% 85-115 CCV ug/L 50.00 98.4% 85-115 Endosulfan Sulfate 608/8081 12/03/18:214169caa Blank ug/L ND <0.05 LCS ug/L 0.5000 95.7% 34-131 BS ug/L 0.5000 50.7% 47-128 BSD ug/L 0.5000 62.5% 47-128 BSRPD ug/L 0.5005 20.8% _<l9 410 608/8081 12/06/18:217732SBL CCV ug/L 100.0 94.4% 85-115 CCV ug/L 50.00 94.6% 85-115 Endrin -608/8081 12/03/18:214169caa Blank ug/L ND <0.05 LCS ug/L 0.5000 99.0% 0-189 BS ug/L 0.5000 4.4% 43-132 436 BSD ug/L 0.5000 11.3% 43-132 436 , BSRPD ug/L 0.5005 . 0.035 <0.05 608/8081 12/06/18:217732SBL CCV ug/L 100.0 108% 85-115 CCV ug/L 50.00 93.3% 85-115 Endrin Aldehyde 608/8081 12/03/18:214169caa Blank ug/L ND • <0.05 LCS ug/L 0.5000 98.6% 31-133 BS ug/L 0.5000 63.3% 16-116 BSD ug/L 0.5000 79.5% 16-116 BSRPD ug/L 0.5005 22.7% <13 410 608/8081 12/06/18:217732SBL CCV ug/L 100.0 99.5% 85-115 CCV ug/L;. 50.00 88.2% 85-115 I . Page 33 of 43 December 26, 2018 Lab ID : SP 1815814 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID . Type Units Conc. QC Data DQO Note Organic Endrin Ketone 608/8081 12/03/18:214169caa Blank ug/L ND <0.05 LCS ug/L 0.5000 103% 34-150 BS ug/L 0.5000 76.8% 28-162 BSD ug/L 0.5000 90.9% 28-162 BSRPD ug/L 0.5005 16.7% <_20 608/8081 12/06/18:217732SBL CCV ug/L 100.0 106% 85-115 CCV ug/L 50.00 99.3% 85-115 gamma-Chlordane 608/8081 12/03/18:214169caa Blank ug/L ND <0.05 LCS ug/L . 0.5000 95.1% 36-125 BS ug/L 0.5000 51.3% 31-123 BSD ug/L 0.5000 64.4% 31-123 BSRPD ug/L 0.5005 22.7% <_22 410 608/8081 12/06/18:217732SBL CCV ug/L 100.0 103% 85-115 CCV ug/L 50.00 92.7% 85-115 Heptachlor 608/8081 12/03/18:214169caa Blank ug/L ND <0.05 LCS ug/L 0.5000 87.0% 34-126 BS ug/L 0.5000' 27.8% 41-114 436 ' BSD ug/L 0.5000 38.6% 41-114 436 BSRPD ug/L 0.5005 0.054 <0.05 410 608/8081 12/06/18:217732SBL CCV ug/L 100.0 107% 85-115 CCV ug/L 50.00 103% 85-115 Heptachlor Epoxide 608/8081 12/03/18:214169caa Blank ug/L ND <0.05 LCS ug/L 0.5000 89.3% 39-126 BS ug/L 0.5000 50.7% 45-122 BSD ug/L 0.5000 61.6% 45-122 BSRPD ug/L 0.5005 19.4% <_23 608/8081 12/06/18:217732SBL CCV ug/L 100.0 108% 85-115 CCV ug/L 50.00 90.2% 85-115 Lindane 608/8081 12/03/18:214169caa Blank ug/L ND <0.05 LCS ug/L 0.5000 99.9% 41-123 BS ug/L 0.5000 48.3% 46-127 BSD ug/L 0.5000 55.6% 46-127 BSRPD ug/L 0.5005 14.1% <_16 608/8081 12/06/18:217732SBL CCV ug/L 100.0 112% 85-115 CCV ug/L 50.00 102% 85-115 Methoxychlor 608/8081 12/03/18:214169caa Blank ug/L ND <0.1 LCS ug/L 0.5000 101% 23-142 BS ug/L 0.5000 23.1% 51-126 436 BSD ug/L 0.5000 42.0% 51-126 436 BSRPD ug/L 0.5005 0.094 <0.1 608/8081 12/06/18:217732SBL CCV ug/L 100.0 102% 85-115 CCV ug/L 50.00 98.0% 85-115 p,p-DDD 608/8081 12/06/18:217870SBL CCV ug/L 100.0 107% 85-115 CCV ug/L 50.00 142% 85-115 360 p,p-DDE 608/8081 12/06/18:217732SBL CCV ug/L 100.0 108% 85-115 CCV ug/L 50.00 96.4% 85-115 p,p-DDT 608/8081 12/06/18:217732SBL CCV ug/L 100.0 101% 85-115 CCV ug/L 50.00 91.2% 85-115. Tetrachloro-m-xylene 608/8081 12/03/18:214169caa Blank ug/L 0.5005 72.2% 15-143 LCS ug/L 0.5005 81.7% 15-143 BS ug/L 0.5005 35.2% 26-141 BSD ug/L 0.5005 38.4% 26-141 BSRPD ug/L 0.5005 0.016 <_0.05 608/8081 12/06/18:217732SBL CCV ug/L 100.1 105% 85-115 Page 34 of 43 December 26, 2018 Lab ID : SP 1815 814 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Conc. QC Data DQO Note Organic Tetrachloro-m-xylene ( 608/8081 12/06/18:217732SBL CCV ug/L 50.05 102% 85-115 Toxaphene 608/8081 12/03/18:214169caa Blank ug/L ND <0.5 PCB 1016 8082 12/07/18:217811 SBL CCV ug/L 1003 129% 70-130 CCV ug/L 501.5 125% 70-130 PCB 1260 8082 12/07/18:217811 SBL CCV ug/L 1000 124% 70-130 CCV ug/L 500.0 114% 70-130 Tetrachloro-m-xylene 8082 12/07/18:217811SBL CCV ug/L 300.3 160% 85-115 362 CCV ug/L 200.2 154% 85-115 362 PCB 1016/1242-1 8082A 12/04/18:214234caa Blank ug/L ND <0.5 LCS ug/L 2.500 112% 22-128 BS ug/L 2.500 117% 18-135 BSD ug/L 2.500 102% 18-135 BSRPD ug/L 0.5005 14.0% <28 PCB 1221-1 8082A 12/04/18:214234caa Blank ug/L ND <0.5 PCB 1232-1 8082A 12/04/18:214234caa Blank ug/L ND <0.5 PCB 1242 8082A 12/04/18:214234caa Blank ug/L ND <0.5 PCB 1248-1 8082A 12/04/18:214234caa Blank ug/L ND <0.5 PCB 1254-1 8082A 12/04/18:214234caa Blank ug/L ND <0.5 PCB 1260-1 8082A 12/04/18:214234caa Blank ug/L ND <0.5 LCS ug/L 2.502 112% 15-141 BS ug/L 2.502 121% 20-144 BSD ug/L 2.502 107% 20-144 BSRPD ug/L 0.5005 12.1% <28 Tetrachloro-m-xylene 8082A 12/04/18:214234caa Blank ug/L 0.5005 40.6% 26-102 LCS ug/L 0.5005 43.7% 26-102 BS ug/L 0.5005 47.6% N/A BSD ug/L 0.5005 41.6% N/A BSRPD ug/L 0.5005 0.030 <_0.05 1,1,1,2-Tetrachloroethane 8260B 12/07/18:218564VRG CCV ug/L 25.00 79.4% 70-130 1,1,1-Trichloroethane(TCA) 8260B 12/07/18:218564VRG CCV ug/L 25.00 102% 70-130 1,1,2,2-Tetrachloroethane 8260B 12/07/18:218564VRG CCV ug/L 25.00 137% 70-130 360 1,1,2-Trichloroethane 8260B 12/07/18:218564VRG CCV ug/L 25.00 104% 70-130 1,1-Dichloroethane 8260B 12/07/18:218564VRG CCV ug/L 25.00 94.6% 70-130 1,1-Dichloroethylene 8260B 12/07/18:218564VRG CCV ug/L 25.00 86.6% 80-120 1,1-Dichloropropene 8260B 12/07/18:218564VRG CCV ug/L 25.00 116% 70-130 1,2,3-Trichlorobenzene 8260B 12/07/18:218564VRG CCV ug/L 25.00 202% 70-130 360 1,2,3-Trichloropropane 8260B 12/07/18:218564VRG CCV ug/L 25.00 121% 70-130 1,2,4-Trichlorobenzene 8260B 12/07/18:218564VRG CCV ug/L 25.00 154% 70-130 360 1,2,4-Trimethylbenzene 8260B 12/07/18:218564VRG CCV ug/L 25.00 97.5% 70-130 1,2-Dichlorobenzene 8260B 12/07/18:218564VRG CCV ug/L 25.00 105% 70-130 1,2-Dichloroethane(EDC) 8260B 12/07/18:218564VRG CCV ug/L 25.00 105% 70-130 1,2-Dichloroethane-d4 8260B 12/07/18:218564VRG CCV ug/L 25.00 108% 70-130 1,2-Dichloropropane 8260B l2/07/18:218564VRG CCV ug/L 25.00 112% 80-120 1,3,5-Trimethylbenzene 8260B 12/07/18:218564VRG CCV ug/L 25.00 94.2% 70-130 1,3-Dichlorobenzene 8260B 12/07/18:218564VRG CCV ug/L 25.00 107% 70-130 1,3-Dichloropropane 8260B 12/07/18:218564VRG CCV ug/L 25.00 95.3% 70-130 1,4-Dichlorobenzene 8260B 12/07/18:218564VRG_CCV ug/L 25.00 117% 70-130 1,4-Dioxane 8260B 12/07/18:218564VRG CCV ug/L 20.00 11000% 50-150 360 2,2-Dichloropropane 8260B 12/07/18:218564VRG CCV ug/L 25.00 82.2% 70-130 2-Butanone(MEK) 8260B 12/07/18:218564VRG CCV ug/L 80.00 193% 50-150 360 • 2-Chloroethylvinyl ether 8260B 12/07/18:218564VRG CCV ug/L 80.00 140% 50-150 2-Chlorotoluene 8260B 12/07/18:218564VRG CCV ug/L 25.00 109% 70-130 2-Hexanone 8260B 12/07/18:218564VRG CCV ug/L 80.00 269% 50-150 360 4-Bromofluorobenzene(BFB) 8260B 12/07/18:218564VRG CCV ug/M.•• 25.00 110% 70-130 Page 35 of 43 December 26, 2018 Lab ID : SP 1815814 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Conc. QC Data DQO Note Organic • 4-Chlorotoluene 8260B 12/07/18:218564VRG CCV ug/L 25.00 102% 70-130 4-Methyl-2-pentanone(MIBK) 8260B 12/07/18:218564VRG CCV ug/L 80.00 168% 50-150 360 Acetone 8260B 12/07/18:218564VRG CCV ug/L 80.00 143% 50-150 Acrolein 8260B 12/07/18:218564VRG CCV ug/L 40.20 2480% 50-150 360 Acrylonitrile 8260B 12/07/18:218564VRG CCV ug/L 40.20 916% 50-150 360 Benzene 8260B 12/07/18:218564VRG CCV ug/L 25.00 119% 70-130 Bromobenzene 8260B 12/07/18:218564VRG CCV ug/L 25.00 95.0% 70-130 Bromochloromethane 8260B 12/07/18:218564VRG CCV ug/L 25.00 113% 70-130 Bromodichloromethane 8260B 12/07/18:218564VRG CCV ug/L 25.00 82.2% 70-130 Bromoform 8260B 12/07/18:218564VRG CCV ug/L 25.00 72.0% 70-130 Bromomethane(Methyl Bromide) 8260B 12/07/18:218564VRG CCV ug/L 25.00 84.5% 70-130 Carbon Disulfide 8260B 12/07/18:218564VRG CCV ug/L 50.00 84.4% 50-150 Carbon Tetrachloride 8260B 12/07/18:218564VRG CCV ug/L 25.00 78.5% 70-130 Chlorobenzene 8260B 12/07/18:218564VRG CCV ug/L 25.00 87.4% 70-130 Chloroethane(Ethyl Chloride) 8260B 12/07/18:218564VRG CCV ug/L 25.00 119% 70-130 Chloroform 8260B 12/07/18:218564VRG CCV ug/L 25.00 110% 80-120 Chloromethane(Methyl Chloride) 8260B 12/07/18:218564VRG CCV ug/L 25.00 121% 70-130 cis-1,2-Dichloroethylene 8260B 12/07/18:218564VRG CCV ug/L 25.00 84.0% 70-130 cis-1,3-Dichloropropene 8260B 12/07/18:218564VRG CCV ug/L 23.88 102% 70-130 Dibromochloromethane 8260B 12/07/18:218564VRG CCV ug/L 25.00 74.5% 70-130 Dibromofluromethane 8260B 12/07/18:218564VRG CCV ug/L 25.00 104% 70-130 Dibromomethane 8260B 12/07/18:218564VRG CCV ug/L 25.00 109% 70-130 Dichlorodifluoromethane 8260B 12/07/18:218564VRG CCV ug/L 25.00 132% 70-130 360 Dichloromethane 8260B 12/07/18:218564VRG CCV ug/L 25.00 97.9% 70-130 Ethyl tert-Butyl Ether 8260B 12/07/18:218564VRG CCV ug/L 25.00 256% 50-150 360 Ethylbenzene 8260B 12/07/18:218564VRG CCV ug/L 25.00 86.6% 80-120 Hexachlorobutadiene 8260B, 12/07/18:218564VRG CCV ug/L, 25.00 90.7% 70-130 Isopropyl Ether 8260B 12/07/18:218564VRG CCV ug/L4;', 25.00 247% 50-150 360 Isopropylbenzene 8260B 12/07/18:218564VRG CCV ug/L 25.00 105% 70-130 Methyl tert-Butyl Ether 8260B 12/07/18:218564VRG CCV ug/L 25.00 230% 70-130 360 Naphthalene 8260B 12/07/18:218564VRG CCV ug/L 25.00 230% 70-130 360 n-Butylbenzene 8260B 12/07/18:218564VRG CCV ug/L 25.00 89.7% 70-130 n-Propylbenzene 8260B 12/07/18:218564VRG CCV ug/L 25.00 115% 70-130 p-Isopropyltoluene 8260B 12/07/18:218564VRG CCV ug/L 25.00 91.1% 70-130 sec-Butylbenzene 8260B 12/07/18:218564VRG CCV ug/L 25.00 92.1% 70-130 Styrene 8260B 12/07/18:218564VRG CCV ug/L 25.00 91.2% 70-130 TAME 8260B 12/07/18:218564VRG CCV ug/L 25.00 267% 50-150 360 tert-Butanol 8260B 12/07/18:218564VRG CCV ug/L 125.0 266% 50-150 360 tert-Butylbenzene 8260B 12/07/18:218564VRG CCV ug/L 25.00 99.6% 70-130 Tetrachloroethylene(PCE) 8260B 12/07/18:218564VRG CCV ug/L 25.00 86.6% 70-130 Toluene 8260B 12/07/18:218564VRG CCV ug/L 25.00 95.1% 80-120 Toluene-d8 8260B 12/07/18:218564VRG CCV ug/L 25.00 93.2% 70-130 trans-1,2-Dichloroethylene 8260B 12/07/18:218564VRG CCV ug/L 25.00 80.9% 70-130 trans-1,3-Dichloropropene 8260B 12/07/18:218564VRG CCV ug/L 23.00 94.3% 70-130 Trichloroethylene(TCE) 8260B 12/07/18:218564VRG CCV ug/L 25.00 99.9% 70-130 Trichlorofluoromethane F-11 8260B 12/07/18:218564VRG CCV ug/L 25.00 103% 70-130 Trichlorotrifluoroethane F-113 8260B 12/07/18:218564VRG CCV ug/L 25.00 74.0% 70-130 Vinyl Acetate 8260B 12/07/18:218564VRG CCV ug/L 80.00 156% 50-150 360 Vinyl Chloride 8260B 12/07/18:218564VRG CCV ug/L 25.00 118% 80-120 Xylene m,p 8260B 12/07/18:218564VRG CCV ug/L 50.00 86.9% 70-130 Xylenes o 8260B 12/07/18:218564VRG CCV ug/L 25.00 87.8% 70-130 1,2,4-Trichlorobenzene 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 LCS mg/kg 0.5000 76.2% 34-138 _ Page 36 of 43 December 26, 2018 Lab ID : SP 1815814 South Tahoe Public Utility District Customer : 2-11369 Quality Control-Organic Constituent Method Date/ID Type Units Conc. , QC Data DQO Note Organic 1,2,4-Trichlorobenzene 8270C MS . mg/kg 0.5000 64.9% 0-105 (CH 1890191-001) MSD mg/kg 0.5000 80.8% 0-105 MSRPD mg/kg 1.000 0.080 <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 . 107% 70-130 11 8270C 12/18/18:218435SBL CCV mg/L 20.00 111% 70-130 1,2-Dichlorobenzene 8270C . 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 106% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 108% 70-130 1,2-Diphenylhydrazine 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 1,3-Dichlorobenzene 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 106% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 107% 70-130 1,4-Dichlorobenzene 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 LCS mg/kg 0.5000 71.0% 24-140 MS mg/kg 0.5000 57.2% 0-102 (CH 1890191-001) MSD mg/kg 0.5000 ' 72.5% 0-102 MSRPD mg/kg 1.000 .0.076 <_0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 106% 80-120 8270C 12/18/.18:2184355BL CCV mg/L 20.00 108% 80-120 2,3,4,6-Tetrachlorophenol 8270C 12/13/18:214636caa Blank mg/kg ND <1 8270C 12/18/18:218435SBL CCV mg/1,4 10.00 237% 70-130 360 2,4,5-Trichlorophenol 8270C 12/13/18:214636caa Blank mg/kgs:;` ND <1 8270C 12/17/18:218365SBL CCV mg/L 20.00 103% 70-130 . 8270C 12/18/18:218435SBL CCV mg/L 20.00 115% 70-1.30 2,4,6-Tribromophenol 8270C 12/13/18:214636caa Blank mg/kg 1.000 71.6% 0-129 LCS mg/kg 1.000 78.7% 0-129 MS mg/kg 1.000 68.6% N/A (CH 1890191-001) MSD mg/kg 1.000 82.4% N/A MSRPD mg/kg 1.000 0.14 <1 8270C 12/17/18:218365SBL CCV mg/L 20.00 109% 70-130 . 8270C 12/18/18:218435SBL CCV mg/L 20.00 118% 70-130 2,4,6-Trichlorophenol 8270C 12/13/18:214636caa Blank mg/kg ND <1 8270C 12/17/18:218365SBL CCV mg/L 20.00 105% 80-120 8270C 12/18/18:218435SBL CCV mg/L 20.00 109% 80-120 2,4-Dichlorophenol 8270C 12/13/18:214636caa Blank mg/kg ND <1 8270C 12/17/18:218365SBL CCV mg/L 20.00 101% 80-120 8270C 12/18/18:218435SBL CCV trig/L 20.00 117% 80-120 2,4-Dimethylphenol 8270C 12/13/18:214636caa Blank mg/kg ND <1 8270C 12/17/18:218365SBL CCV mg/L 20.00 110% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 118% 70-130 2,4-Dinitrophenol 8270C 12/13/18:214636caa Blank . mg/kg ND <1 8270C 12/17/18:218365SBL CCV mg/L 20.00 91.2% 70-130 8270C 12/18/18:218435SBL CCV mg/L . 20.00 87.0% 70-130 2,4-Dinitrotoluene 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 LCS mg/kg 0.5000 66.9% 28-139 \ MS mg/kg 0.5000 59.0% 0-112 (CH 1890191-001) MSD mg/kg 0.5000 67.6% 0-112, MSRPD mg/kg 1.000 0.043 <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 111% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 117% 70-130 2,6-Dinitrotoluene 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 111% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 112% 70-130 2-Chlorophenol 8270C 12/13/18:214636caa Blank mg/kg ND <1 Page 37 of 43 December 26, 2018 Lab ID : SP 1815814 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Conc. QC Data DQO Note Organic 2-Chlorophenol 8270C 12/13/18:214636caa LCS mg/kg 1.000 76.7% 27-150 MS mg/kg 1.000 64.0% 0-113 (CH 1890191-001) MSD mg/kg 1.000 80.4% , 0-113 r MSRPD mg/kg 1.000 0.16 <1 8270C 12/17/18:218365SBL CCV mg/L 20.00 108% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 113% 70-130 2-Fluorobiphenyl 8270C 12/13/18:214636caa Blank mg/kg 0.5000 65.7% 0-106 LCS mg/kg 0.5000 69.2% 0-106 MS mg/kg 0.5000 57.1% N/A (CH 1890191-001) MSD mg/kg 0.5000 67.6% N/A MSRPD mg/kg 1.000 0.053 <0.5 8270C 12/17/18:218365SBL CCV mg/L 10.00 100% 70-130 8270C 12/18/18:218435SBL CCV mg/L 10.00 98.9% 70-130 2-Fluorophenol 8270C 12/13/18:214636caa Blank mg/kg;, 1.000 62.8% 0-115 LCS mg/kg:-` 1.000 68.5% 0-115 MS mg/kg 1.000 58.8% N/A (CH 1890191-001) MSD mg/kg 1.000 68.9% N/A MSRPD mg/kg 1.000 0.10 <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 102% 70-130 8270C 12/18/18:218435SBL CCV - mg/L 20.00 101% 70-130 2-Methylnaphthalene 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 85.5% 50-150 8270C 12/18/18:218435SBL CCV mg/L 20.00 89.3% 50-150 2-Methylphenol 8270C 12/13/18:214636caa Blank mg/kg ND <1 8270C 12/17/18:218365SBL CCV mg/L 20.00 107% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 115% 70-130 2-Nitroaniline 8270C 12/13/18:214636caa Blank mg/kg ND <1 8270C 12/17/18:218365SBL CCV mg/L 20.00 81.0% 50-150 8270C 12/18/18:218435SBL CCV mg/L 20.00 75.3% 50-150 2-Nitrophenol 8270C 12/13/18:214636caa Blank mg/kg ND <1 8270C 12/17/18:218365SBL CCV mg/L 20.00 110% 80-120 8270C 12/18/18:218435SBL CCV mg/L 20.00 114% 80-120 3,3-Dichlorobenzidine 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 • 8270C 12/17/18:218365SBL CCV mg/L 20.00 135% 50-150 8270C 12/18/18:218435SBL CCV mg/L 20.00 118% 50-150 3-Nitroaniline 8270C 12/13/18:214636caa Blank mg/kg ND <1 8270C 12/17/18:218365SBL CCV mg/L 20.00 118% 50-150 8270C 12/18/18:2184355BL CCV mg/L 20.00 114% 50-150 4,6-Dinitro-2-methylphenol 8270C 12/13/18:214636caa Blank mg/kg ND <1 4,6-Dinitro-o-cresol 8270C 12/17/18:218365SBL CCV mg/L 20.00 101% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 87.8% 70-130 4-Bromophenylphenylether 8270C 12/13/18:214636caa Blank mg/kg , ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 113% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 117% 70-130 4-Chloro-3-methylphenol 8270C 12/13/18:214636caa Blank mg/kg ND <1 LCS mg/kg 1.000 84.6% 29-144 MS mg/kg 1.000 78.5% 0-120 ' (CH 1890191-001) MSD mg/kg 1.000 95.7% 0-120 MSRPD mg/kg 1.000 0.17 <1 4-Chloroaniline 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 77.8% 50-150 8270C 12/18/18:218435SBL CCV mg/L 20.00 96.9% 50-150 4-Methylphenol 8270C 12/13/18:214636caa Blank mg/kg _ ND <1 8270C 12/17/18:218365SBL CCV mg/L 20.00 108% 70-130 X Page 38 of 43 December 26, 2018 Lab ID : SP 1815814 South Tahoe Public Utility District Customer : 2-11369 Quality Control-Organic Constituent Method Date/ID Type Units Conc. QC Data DQO Note ' Organic 4-Methylphenol 8270C 12/18/18:218435SBL CCV mg/L 20.00 122% 70-130 4-Nitroaniline 8270C 12/13/18:214636caa Blank mg/kg ND <1 8270C 12/17/18:218365SBL CCV mg/L 20.00 82.5% 50-150 8270C 12/18/18:218435SBL CCV mg/L 20.00 65.6% 50-150 4-Nitrophenol 8270C 12/13/18:214636caa Blank mg/kg ND <1 LCS mg/kgs;' 1.000 76.8% 39-186 MS mg/ke. 1.000 80.9% 0-122 (CH 1890191-001) MSD mg/kg 1.000 98.3% 0-122 MSRPD mg/kg 1.000 0.17 <_1 8270C 12/17/18:218365SBL CCV mg/L 20.00 89.2% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 85.7% 70-130 Acenaphthene 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 LCS mg/kg 0.5000 74.1% 35-139 MS mg/kg 0.5000 58.8% 0-108 (CH 1890191-001) MSD mg/kg 0.5000 75.2% 0-108 MSRPD mg/kg 1.000 0.082 <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 107% 80-120 8270C 12/18/18:218435SBL CCV mg/L 20.00 104% 80-120 Acenaphthylene 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 110% 70-130 8270C 12/18/18:218435SBL CCV mg/L. 20.00 102% 70-130 Aniline 8270C 12/13/18:214636caa Blank mg/kg ND <1 8270C 12/17/18:218365SBL CCV mg/L 20.00 80.7% 50-150 8270C 12/18/18:218435SBL CCV mg/L 20.00 106% 50-150 Anthracene 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 112% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 106% 70-130 Azobenzene 8270C 12/17/18:218365SBL CCV mg/L 20.00 113% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 115% 70-130 Benzidine 8270C 12/13/18:214636caa Blank mg/kg ND <1 8270C 12/17/18:218365SBL CCV mg/L 20.02 142% 50-150 8270C 12/18/18:218435SBL CCV mg/L 20.02 98.9% 50-150 Benzo(a)anthracene 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 114% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 108% 70-130 Benzo(a)pyrene 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 120% 80-120 8270C 12/18/18:218435SBL CCV mg/L 20.00 116% 80-120 Benzo(b)fluoranthene 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 120% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 118% 70-130 Benzo(g,h,i)perylene 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 108% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 122% 70-130 Benzo(k)fluoranthene 1 i 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 113% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 102% 70-130 Benzoic Acid 8270C 12/13/18:214636caa Blank mg/kg ND <1 8270C 12/17/18:218365SBL CCV mg/L 20.00 103% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 98.8% 70-130 Benzylalcohol 8270C 12/13/18:214636caa Blank mg/kg ND <1 8270C 12/17/18:218365SBL CCV mg/L 20.00 ' 91.8% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 95.8% 70-130 Page 39 of 43 J December 26, 2018 Lab ID : SP 1815814 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units, , Conc. QC Data DQO Note Y' Organic bis(2-Chloroethoxy)methane 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 116% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 120% 70-130 bis(2-Chloroethyl)ether 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV ' mg/L 20.00 106% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 112% 70-130 bis(2-Chloroisopropyl)ether 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 102% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 106% 70-130 bis(2-Ethylhexyl)phthalate 8270C 12/13/18:214636caa Blank- mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 120% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 109% 70-130 Butylbenzylphthalate 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 115% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 108% 70-130 Chloronaphthalene 8270C 12/13/18:214636caa Blank mg/kg - ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 110% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 104% 70-130 Chlorophenylphenylether 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 111% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 116% 70-130 Chrysene 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 112% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 105% 70-130 Dibenzo(a,h)anthracene 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 119% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 131% 70-130 360 Dibenzofuran 8270C 12/13/18:214636caa Blank mg/kg ND <1 8270C 12/17/18:218365SBL CCV mg/L 20.00 89.0% 50-150 8270C 12/18/18:218435SBL CCV mg/L 20.00 84.2% 50-150 Diethylphthalate 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 111% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 108% 70-130 Dimethylphthalate 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 111% 70-130 8270C 12/18/18:2184355BL CCV mg/L 20.00 109% 70-130 Di-n-butylphthalate 8270C 12/13/18:214636caa Blank mg/kgND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 112% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 101% 70-130 Di-n-octylphthalate 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 118% 80-120 8270C 12/18/18:218435SBL CCV mg/L 20.00 98.3% 80-120 Fluoranthene 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 116% 80-120 8270C 12/18/18:218435SBL CCV mg/L 20.00 113% 80-120 Fluorene 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 112% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 112% 70-130 Hexachlorobenzene 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 108% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 114% 70-130 Hexachlorobutadiene 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 107% 80-120 Page 40 of 43 December 26, 2018 ,Lab ID : SP 1815814 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Conc. QC Data DQO Note Organic Hexachlorobutadiene 8270C 12/18/18:218435SBL CCV mg/L 20.00 112% 80-120 Hexachlorocyclopentadiene 8270C 12/13/18:214636caa Blank mg/kg' ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 123% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 92.8% 70-130 Hexachloroethane 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 106% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 105% 70-130 Indeno(1,2,3-c,d)pyrene 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 104% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 124% 70-130 Isophorone 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV • mg/L 20.00 107% 70-130 8270C 12/18/18:218435SBL CCV mg/L , 20.00 106% 70-130 Naphthalene 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 104% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 101% 70-130 Nitrobenzene 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 103% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 102% 70-130 Nitrobenzene-d5 8270C 12/13/18:214636caa Blank mg/kg 0.5000 68.2% 0-151 LCS mg/kg 0.5000 71.6% 0-151 MS mg/kg 0.5000 57.7% N/A (CH 1890191-001) MSD mg/kg 0.5000 69.4% N/A MSRPD mg/kg 1.000 0.058 <0.5 8270C 12/17/18:218365SBL CCV mg/L' 10.00 99.6% 70-130 8270C 12/18/18:218435SBL CCV mg/L 10.00 98.2% 70-130 N-Nitrosodimethylamine 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 100% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 105% 70-130 • N-Nitrosodi-N-propylamine 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 LCS mg/kg 0.5000 67.3% 25-149 MS mg/kg 0.5000 57.8% 0-154 (CH 1890191-001) MSD mg/kg 0.5000 73.8% 0-154 MSRPD mg/kg 1.000 0.080 55.0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 107% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 114% 70-130 N-Nitrosodiphenylamine 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:2183655BL CCV mg/L 20.00 112% 80-120 8270C 12/18/18:218435SBL CCV mg/L 20.00 111% 80-120 p-Chloro-m-cresol 8270C 12/17/18:218365SBL CCV mg/L 20.00 105% 80-120 8270C 12/18/18:218435SBL CCV mg/L 20.00 111% 80-120 Pentachlorophenol 8270C 12/13/18:214636caa Blank mg/kg ND <1 LCS mg/kg 1.000 77.0% 60-140 MS mg/kg 1.000 77.8% 0-113 (CH 1890191-001), MSD mg/kg 1.000 94.8% 0-113 MSRPD mg/kg 1.000 0.17 <1 8270C 12/17/18:218365SBL CCV mg/L 20.00 101% 80-120 8270C 12/18/18:218435SBL CCV mg/L 20.00 101% 80-120 Phenanthrene 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 107% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 101% 70-130 Phenol 8270C 12/13/18:214636caa Blank mg/kg ND <1 LCS mg/kg . 1.000 76.7% 22-165 MS mg/kg 1.000 59.9% 0-125 Page 41 of 43 J December 26, 2018 Lab ID : SP 1815814 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units;?;, Conc. QC Data DQO Note Organic Phenol 8270C (CH 1890191-001) MSD mg/kg 1.000 78.1% 0-125 MSRPD mg/kg 1.000 0.18 <1 8270C 12/17/18:218365SBL CCV mg/L 20.00 104% 80-120 8270C 12/18/18:218435SBL CCV mg/L 20.00 109% 80-120 Phenol-d6 8270C 12/13/18:214636caa Blank mg/kg 1.000 65.8% 0-124 LCS mg/kg 1.000 72.0% 0-124 MS mg/kg 1.000 62.8% N/A (CH 1890191-001) MSD mg/kg 1.000 73.4% N/A MSRPD mg/kg 1.000 0.11 <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 101% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 107% 70-130 p-Terphenyl-d14 8270C 12/13/18:214636caa Blank mg/kg 0.5000 41.2% 0-101; LCS mg/kg 0.5000 43.0% 0-101 MS mg/kg 0.5000 35.8% N/A (CH 1890191-001) MSD mg/kg 0.5000 42.9% N/A MSRPD mg/kg 1.000 0.035 <0.5 8270C 12/17/18:218365SBL CCV mg/L 10.00 99.3% 70-130 8270C 12/18/18:218435SBL CCV mg/L 10.00 98.7% 70-130 Pyrene 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 LCS mg/kg 0.5000 91.8% 54-133 MS mg/kg 0.5000 68.5% 0-135 (CH 1890191-001) MSD mg/kg 0.5000 87.4% 0-135 MSRPD me/kg 1.000 0.094 <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00 109% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 95.2% 70-130 Pyridine 8270C 12/13/18:214636caa Blank mg/kg ND <0.5 8270C 12/17/18:218365SBL CCV mg/L 20.00. 100% 70-130 8270C 12/18/18:218435SBL CCV mg/L 20.00 103% 70-130 Definition CCV :Continuing Calibration Verification-Analyzed to verify the instrument calibration is within criteria. Blank :Method Blank-Prepared to verify that the preparation process is not contributing contamination to the samples. ExBlk :TCLP/STLC Extraction Blank-Prepared to verify that the preparation process is not contributing contamination to the samples. LCS :Laboratory Control Standard/Sample-Prepared to verify that the preparation process is not affecting analyte recovery. MS :Matrix Spikes-A random sample is spiked with a known amount of analyte.The recoveries are an indication of how that sample matrix affects analyte recovery. MSD :Matrix Spike Duplicate of MS/MSD pair-A random sample duplicate is spiked with a known amount of analyted.The recoveries are an indication of how that sample matrix affects analyte recovery. BS :Blank Spikes-A blank is spiked with a known amount of analyte.It is prepared to verify that the preparation process is not affecting analyte recovery. BSD :Blank Spike Duplicate of BS/BSD pair-A blank duplicate is spiked with a known amount of analyte.It is prepared to verify that the preparation process is not affecting analyte recovery. MSRPD :MS/MSD Relative Percent Difference(RPD)-The MS relative percent difference is an indication of precision for the preparation and analysis. BSRPD :BS/BSD Relative Percent Difference(RPD)-The BS relative percent difference is an indication of precision for the preparation and analysis. ND :Non-detect-Result was below the DQO listed for the analyte. DQO :Data Quality Objective-This is the criteria against which the quality control data is compared. Explanation 210 :The method blank was positive.However,samples reported were either ten times greater than the blank concentration or non detect and accepted. 310 :LCS above Acceptance Range(AR).Samples which were non detect for this analyte were accepted. 360 :CCV above Acceptance Range(AR).Samples which were non detect for this analyte were accepted. 362 :Surrogates are qualified on Control Chart Limits,these are CCV limits.See individual sample reports. 410 :Relative Percent Difference(RPD)not within Maximum Allowable Value(MAV).Data was accepted based on the LCS or CCV recovery. Page 42 of 43 December 26, 2018 Lab ID : SP 1815814 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Explanation 435 :Sample matrix may be affecting this analyte.Data was accepted based on the LCS or CCV recovery. 436 :Blank Spike(BS)not within Acceptance Range(AR).Data was accepted based on the LCS or CCV recovery. Page 43 of 43 SOUTH TAHOE PUBLIC UTILITY DISTRICT 14i Iic( HAf CHAIN CUSTODY South Tahoe Public UtilityDistrict .9�•.�- � .ti._:` Lab Sent to: �:.••%vx•=:/JJ,.{ :.•w.Ji{t:xi .} V:{-; :J:i}rx•Jr:.r•:.}: rrx !?}?Y { frr rJ---:J: r:r::J:NvY:p rxrrlrv,r:•l:yvY. NN: x Turna roune 1275 Meadow Crest Drive --:••:� • • South Lake Tahoe,CA 96150 . h �i ..� .�liiiiiiiMPEPORPOOligtiOgget;;27:;;;'4 Standard Phone:(530)-543-6231 !'4•::•4 ' - Sam•le FAX: 530-541-4296 .' . . 4 i 0 I x/�l�rxJIrYNJJJ/�4? %NY% {N.? r:.•r.:J.%I.JJI:N.r•riJ/J: � ; ::f:•ifr • Jl : :r { :.: • • 2 � e_ r 2r.•irir4•::vv:H:Jrr vNxvwx� YAMw� wr •.;{l.•Jv:x:rr:vMNNN::r.•.!SNY{.;:/.•Jr�::v:.•rrrxY::rJ.•::fr:; r:K::•ffi.•: i � f :}{lN%Jv}}}%J.wr i:% :i;w :ryJ:: f:%: g..:•.i::i48 Hr Qvxr� /Y•Nr /meJ �/N,x4V!N!. ?A ,{�N� � �.JJ.: r:/ .J /•:::::� •••J. 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I 1 I • 7738 439/ 7558 Comments: Relinquished by' ...L. • Received by: a Report MTBE to 0.5µg/L:Note any detection of MTBE a 0.2µg/L o Analyze Travel and Field Blanks only if VOCs detected in samples. Signature Signature o Use Calif State Write-On form to report results of Potable Water Wells Print G •&"1 Z) Print BY/A yl Company South Tahoe Public Utility District Company Please Return all STPUD ice chests & Blue Ice. Date: II, jq-fir Time 13.3 d Date: Time ;}}{;r:iiiiKr fiJri.%rii%JYr.::}:r:{if,'r,}i::vii•••vJ.wxN/r}Jr�;vrr'Jirr:<wf}.•J wiNNrfJly,{{¢•k•:xrr:rlii:•:•:•i.%•i}:•f♦:y}i}}}}fr}}'r{�r,:•:•:i:•i:;:; iK:r•N x.YKJ.?•vJlirJr.•J.•...JJ::vr%:}::v{.v:JxNi:r r�vi:v:.,:J N.%/'rlx.•••x•• ..%r::r rrr •NNf{??::xvrr r.. :vr.:•.,: •i Sr J{? v�ti I.•�•rl. J J hNNJ/.%N;{J�.r��J f Jx{:r.• vrrr rvl..l1Jri.'Jf1•' Sx�r.•JJ-rri:.•rr� •J:.•r.•{�x:Y.• - y u .••::••:::•N J v.Y.rrNii'.vrrr.•�:vNrrx/r.Yr r:.•.Yh• A;:.%J•rY K:r:•:rr::r'' Relinquis b Received by: 6�.� �..rf.SJJ.vv r f' r Nrr.nv vxrxxrxr.•.•:rr.••..�•�.: •��rN: rv:.vrr.•ry:vJ.•.•x� _ � �R• rrJx:Nri.v$N r ....{}• ..r{}?.,v{r•:.•:??{{r.;J�:J:•r:.: r{J.•rJ.•lrr.•i•.:uarvr.•�:•.•}//.a•.v Received Intact Signature �, � Signature _1 LL Received cold Print Print _•i �+ Custody seals Company Company. ii1 ti Correct container Date: �L. 1 Time \k9) Date: l t 11 O Time___i_a______ u.abWormslcharn of Custody.doc Page 1 of Subcontract to Babcock Laboratories, Inc. jiap Ref Client: Fruit Growers Laboratory,Inc. ' Address: FGL Environmental,Inc. 853 Corporation St. ,a Santa Paula,CA 93060-3005 . 2 Phone: Fax: Contact Person: - C7 : a Project Name: (2-11369) v SP 1815814- 4E C7 W . o Purchase Order Number: v, 0, v, c4 3 ea.W a • WQ ›. Sampler(s) OPS/US/BC a _ E w a at a U CA z V) 0 x ,a G a op o O "" cv Compositor Setup Date: / / Time: / a. aa o a o 0 °' o 6 c4•,-,' . .o E. z o 8. Cl) E c rn s 0 Lab Number: o n Q, a. .. •,. 4. V E~ O 0 0 Sam Date Time o U U a V g Num Location Description Sampled Sampled °' a o o P Ey a it, 4 o Cl)oo , Cl) os 5 Centrifuge Cake 11/29/18 11:00 G Ski 1 1 Remarks: Relinquished Date: Time: Relinquished Date: Time: Relinquished Date: Time: Received By: Date: Time: Received By: Date: Time: Received By: Date: Time: FGL Environmental Doc ID: 2D0900157_SOP_17.DOC Revision Date: 10/09/14 Page: 1 of 1 Condition Upon Receipt (Attach to COC) Sample Receipt at SP: 1.Number of ice chests/packages received: 1 2. Shipper tracking numbers 7738-4391-7558 .. 3.Were samples received in a chilled condition? Temps: 2 / 4.Surface water(SWTR)bact samples:A sample that has a temperature upon receipt of>10C,whether iced or not, should be flagged unless the time since sample collection has been less than two hours. 5. Do the number of bottles received agree with the Yes No N/A COC? 6.Verify sample date,time, sampler Yes No N/A 7.Were the samples received intact? (i.e. no broken Yes No bottles, leaks, etc.) 8.Were sample custody seals intact? Yes No N/A Sample Verification, Labeling and Distribution: 1.Were all requested analyses understood and Yes No acceptable? 2. Did bottle labels correspond with the client's ID's? Yes No 3.Were all bottles requiring sample preservation Yes No N/A FGL properly preserved? [Exception:Oil&Grease,VOA and CrVI verified in lab] 4.VOAs checked for Headspace? Yes No N/A 5.Were all analyses within holding times at time of Yes No receipt? 6. Have rush or project due dates been checked and Yes No N/A accepted? Include a copy of the COC for lab delivery. (Bacti. Inorganics and Radio) Sample Receipt, Login and Verification completed by: Reviewed and Inez Covarrubias Digitally signed by Inez Covarrubias Approved By ,,; Date:S12/031/2018-113:381:50 Discrepencyr,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 1815814 1V/CC-12/03/2018-13:31:50 • ENVIRONMENTAL , AGRICULTURAL' Analytical Chemists January 3, 2019 South Tahoe Public Utility District 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Subject: Subcontract Analyses for FGL Lab No. SP 1815814 Enclosed please find results for the following sample(s)which were received by FGL. • Sub Contracted-8081 • Sub Contracted-8082 Please note that this analysis was performed by Babcock Laboratories, Inc. (ELAP Certified Laboratory) • 1 Thank you for using FGL Environmental. Sincerely, Digitally signed by Cindy Aguirre Cindy Aguirre cit Title:Customer Service Rep Date:2019-01-03 Enclosure Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:,(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 4:16 B BABCOCK Laboratories, Inc. The Standar<l.of Eecellence,for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 1 of 9 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP1815814-(2-11369) Santa Paula, CA 93060 Work Order Number: B8L0543 Report Date: 21-Dec-2018 Received on Ice(Y/N): Yes Temp: 7 °C Attached is the analytical report for the sample(s) received for your project. Below is a list of the individual sample descriptions with the corresponding laboratory number(s).Also, enclosed is a copy of the Chain of Custody document(if received with your sample(s)). Please note any unused portion of the sample(s) may be responsibly discarded after 30 days from the above report date, unless you have requested otherwise. Thank you for the opportunity to serve your analytical needs. If you have any questions or concerns regarding this report please contact our client service department. Sample Identification Lab Sample# Client Sample ID Matrix Date Sampled By Date Submitted B8L0543-01 Centerifuge Cake Solid 11/29/18 11:00 OPS/US 12/04/18 09:55 Courier(GSO) mailing location P 951 653 3351 CA ELAP No.2698 P.O Box 432 6100 Quail Valley Court F 951 653 1662 EPA No.CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No.OR4035 LACSD No.10119 00 R r V BABCOCK Laboratories, Inc. The Standard of Excellence fir Over 100'rears Client Name: FGL Environmental, Inc. Analytical Report: Page 2 of 9 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP1815814-(2-11369) Santa Paula, CA 93060 Work Order Number: B8L0543 Report Date: 21-Dec-2018 Received on Ice(Y/N): Yes Temp: 7 °C Laboratory Reference Number B8L0543-01 , Sample Description Matrix Sampled Date/Time Received Date/Time Centerifuge Cake Solid 11/29/18 11:00 12/04/18 9:55 Analyte(s) Result RDL Units Method Analysis Date Analyst Flag Organochlorine Pesticides and PCBs by EPA 8000 Series N_RLm 4,4'-DDD ND 550 ug/kg EPA 8081A 12/12/18 22:33 DIS NCALhND 4,4'-DDE ND 400 ug/kg EPA 8081A 12/12/18 22:33 DIS 4,4'-DDT ND 600 ug/kg EPA 8081A 12/12/18 22:33 DIS NCALIm a-BHC ND 500 ug/kg EPA 8081A 12/12/18 22:33 DIS Aldrin ND 300 ug/kg EPA 8081A 12/12/18 22:33 DIS b-BHC ND 500 ug/kg EPA 8081A 12/12/18 22:33 DIS Chlordane ND 3800 ug/kg EPA 8081A 12/12/18 22:33 DIS d-BHC ND 1000 ug/kg EPA 8081A 12/12/18 22:33 DIS Dieldrin ND 400 ug/kg EPA 8081A 12/12/18 22:33 DIS Endosulfan I ND 400 ug/kg EPA 8081A 12/12/18 22:33 DIS Endosulfan II ND 600 ug/kg EPA 8081A 12/12/18 22:33 DIS NMout Endosulfan Sulfate ND 1400 ug/kg EPA 8081A 12/12/18 22:33 DIS NLpas Endrin ND• 400 ug/kg EPA 8081A 12/12/18 22:33 DIS Endrin Aldehyde ND 1000 ug/kg EPA 8081A 12/12/18 22:33 DIS Heptachlor , ND 350 ug/kg EPA 8081A 12/12/18 22:33 DIS NCALIm, NMout Heptachlor Epoxide ND 400 ug/kg EPA 8081A 12/12/18 22:33 DIS Hexachlorobenzene ND 5000 ug/kg EPA 8081A 12/12/18 22:33 DIS NMout Lindane ND 650 ug/kg EPA 8081A 12/12/18 22:33 DIS NMout Methoxychlor ND 4000 ug/kg EPA 8081A 12/12/18 22:33 DIS NCALIm Toxaphene ND 12000 ug/kg EPA 8081A 12/12/18 22:33 DIS Aroclor 1016 ND 3000 ug/kg EPA 8082 12/18/18 12:46 DIS Aroclor 1221 ND 3000 ug/kg EPA 8082 12/18/18 12:46 DIS Aroclor 1232 ND 3000 ug/kg EPA 8082 12/18/18 12:46 DIS Aroclor 1242 ND 3000 ug/kg EPA 8082 12/18/18 12:46 DIS Aroclor 1248 ND 3000 ug/kg EPA 8082 12/18/18 12:46 DIS Aroclor 1254 ND 3000 ug/kg EPA 8082 12/18/18 12:46 DIS Aroclor 1260 ND 3000 ug/kg EPA 8082 12/18/18 12:46 DIS Surrogate:Decachlorobiphenyl 117 % 10-169 EPA 8081A 12/12/18 22:33 DIS Surrogate:Decachlorobiphenyl 91.3 % 10-158 EPA 8082 12/18/18 12:46 DIS mailing location P 951 653 3351 CA ELAP No.2698 P.O Box 432 6100 Quail Valley Court F 951 653 1662 EPA No.CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No.0R4035 LACSD No.10119 , ), O . B BABCOCK Laboratories, Inc. 'The Standard of Excellence,for Over 100 Tears Client Name: FGL Environmental, Inc. Analytical Report: Page 3 of 9 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP1815814-(2-11369) Santa Paula, CA 93060 Report Date: 21-Dec-2018 Work Order Number: B8L0543 Received on Ice(Y/N): Yes Temp: 7 °C Organochlorine Pesticides and PCBs by EPA 8000 Series-Batch Quality Control Spike Source %REC RPD Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch 8L11110-EPA 3550B Blank(8L11110-BLK1) Prepared: 12/11/18 Analyzed:12/12/18 4,4'-DDD ND 11 ug/kg 4,4'-DDE ND 8.0 ug/kg 4,4'-DDT ND 12 ug/kg a-BHC ND 10 ug/kg Aldrin ND 6.0 ug/kg b-BHC ND 10 ug/kg Chlordane ND 75 ug/kg d-BHC ND 20 ug/kg Dieldrin ND 8.0 ug/kg Endosulfan I ND 8.0 ug/kg Endosulfan II ND 12 ug/kg Endosulfan Sulfate ND 29 ug/kg Endrin ND 8.0 ug/kg Endrin Aldehyde ND 20 ug/kg Heptachlor ND 7.0 ug/kg Heptachlor Epoxide ND 8.0 ug/kg Hexachlorobenzene ND 100 ug/kg Lindane ND 13 ug/kg Methoxychlor ND 79 ug/kg Toxaphene ND 250 - ug/kg Surrogate: 21 s ug/kg 20.0 103 10-169 Decachlorobiphenyl LCS(8L11110-BSI) Prepared:12/11/18 Analyzed: 12/12/18 4,4'-DDD 12.8 11 ug/kg 16.7 76.7 57-118 4,4'-DDE 13.3 8.0 ug/kg 16.7 79.9 58-120 4,4'-DDT 11.7 12 ug/kg 16.7 70.0 41-126 a-BHC 11.9 10 ug/kg 16.7 71.6 51-97 Aldrin 12.2 6.0 ug/kg 16.7 73.5 51-100 b-BHC 12.5 10 ug/kg 16.7 , 74.9 50-104 d-BHC 9.68 20 ug/kg 16.7 58.1 17-74 • Dieldrin 12.9 8.0 ug/kg 16.7 77.5 55-105 Endosulfan I 12.8 8.0 ug/kg 16.7 76.9 59-97 Endosulfan II 10.7 12 ug/kg 16.7 64.1 33-101 Endosulfan Sulfate 9.97 29 ug/kg 16.7 59.8 61-113 QLpas mailing location P 951 653 3351 CA ELAP No.2698 .P.O Box-432 6100 Quail Valley Court F 951 653 1662 EPA No.CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No.OR4035 LACSD No.10119 _____ 06 B BABCOCK Laboratories, Inc. The Standard of Excellence jiff Over 100Tears Client Name: FGL Environmental, Inc. Analytical Report: Page 4 of 9 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP1815814-(2-11369) Santa Paula, CA 93060 Work Order Number: B8L0543 Report Date: 21-Dec-2018 Received on Ice(Y/N): Yes Temp: 7 °C Organochlorine Pesticides and PCBs by EPA 8000 Series-Batch Quality Control Spike. Source %REC RPD Analyte(s) Result RDL Units Level Result %REC Limits RPD •Limit Flag Batch 8L11110-EPA 3550B LCS(8L11110-BS1) Prepared:12/11/18 Analyzed: 12/12/18 Endrin 14.4 8.0 ug/kg 16.7 86.6 49-130 Endrin Aldehyde 9.26 20 ug/kg 16.7 55.6 14-107 Heptachlor 11.4 7.0 ug/kg 16.7 68.3 47-104 Heptachlor Epoxide 12.9 8.0 ug/kg 16.7 77.6 52-105 Hexachilorobenzene ND 100 ug/kg 16.7 50-150 Lindane 12.2 13 ug/kg 16.7 73.1 51-93 Methoxychlor 44.6 79 ug/kg 66.7 66.8 62-128 Surrogate: 21 ug/kg 20.0 104 10-169 Decachlorobiphenyl - LCS Dup(8L11110-BSD1) Prepared:12/11/18 Analyzed:12/12/18 4,4'-DDD 13.8 11 ug/kg 16.7 82.8 57-118 7.72 30 4,4'-DDE 13.7 8.0 ug/kg 16.7 82.2 58-120 2.91 30 4,4'-DDT 13.7 12 ug/kg 16.7 82.2 41-126 16.1 30 a-BHC 13.0 10 ug/kg 16.7 78.1 51-97 8.62, 30 Aldrin 13.2 6.0 ug/kg 16.7 79.2 51-100 7.51 30 b-BHC 13.5 10 ug/kg 16.7 81:1 50-104 7.87 30 d-BHC 10.0 20 ug/kg 16.7 60.3 17-74 3.73 30 Dieldrin 13.8 ' 8.0 ug/kg 16.7 82.6 55-105 6.43 30 Endosulfan I 13.6 8.0 ug/kg 16.7 81.8 59-97 6.19 30 Endosulfan II 14.1 12 ug/kg 16.7 84.4 33-101 27.4 40 Endosulfan Sulfate 13.3 29 ug/kg 16.7 79.5 61-113 28.3 40 Endrin 14.8 8.0 ug/kg 16.7 89.1 49-130 2.82 30 Endrin Aldehyde 12.7 20 ug/kg 16.7 76.2 14-107 31.2 40 Heptachlor 13.4 7.0 ug/kg 16.7 80.5 47-104 16.4 30 Heptachlor Epoxide 13.7 8.0 ug/kg 16.7 82.3 52-105 5.82 30 Hexachlorobenzene ND 100 ug/kg 16.7 50-150 40 Lindane 13.4 13 ug/kg 16.7 80.3 51-93 9.47 30 Methoxychlor 53.0 79 ug/kg 66.7 79.5 62-128 17.3 20 Surrogate: 22 ug/kg 20.0 110 10-169 Decachlorobiphenyl mailing location P 951 653 3351 CA ELAP No.2698 P.O Box 432 6100 Quail Valley Court F 951 653 1662 EPA No.CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No.OR4035 LACSD No.10119 00 B BABCOCK Laboratories, Inc. The,Stcrrulard of Excellence fir Over 100 na n Client Name: FGL Environmental, Inc. Analytical Report: Page 5 of 9 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation.Street Project Number: SP1815814-(2-11369) Santa Paula, CA 93060 Work Order Number: B8L0543 Report Date: 21-Dec-2018 Received on Ice(Y/N): Yes Temp: 7 °C Organochlorine Pesticides and PCBs by EPA 8000 Series-Batch Quality Control Spike Source %REC RPD Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch 8L11110-EPA 3550B Matrix Spike(8L11110-MS1) Source:B8L0543-01 Prepared:12/11/18 Analyzed:12/12/18 4,4'-DDD ND 550 ug/kg 16.7 ND 27-155 QMdil 4,4'-DDE ND 400 ug/kg 16.7 ND 30-162 QMdil 4,4'-DDT ND 600 ug/kg 16.7 ND 10-186 QMdil a-BHC ND 500 ug/kg 16.7 ND36-107 QMdil Aldrin ND 300 ug/kg 16.7 ND 27-123 QMdil b-BHC ND 500 ug/kg 16.7 ND 32-114 QMdil d-BHC ND 1000 ug/kg 16.7 ND 10-87 QMdiI Dieldrin ND 400 ug/kg 16.7 ND 41-128 QMdil Endosulfan I ND 400 ug/kg 16.7 ND 33-125 QMdil Endosulfan II ND 600 ug/kg 16.7 ND 16-132 QMout Endosulfan Sulfate ND 1400 ug/kg 16.7 ND 54-122 QMdil Endrin ND 400 ug/kg 16.7 ND 26-189 QMdil Endrin Aldehyde ND 1000 ug/kg 16.7 ND 10-119 QMdil Heptachlor ND 350 ug/kg 16.7 ND 29-125 QMout Heptachlor Epoxide ND 400 ug/kg 16.7 ND 25-148 QMdil Hexachlorobenzene 135 5000 ug/kg 16.7 ND NR 50-150 QMout Lindane ND 650 ug/kg 16.7 ND 28-116 QMout Methoxychlor ND 4000 ug/kg 66.7 ND 10-188 QMdil Surrogate: 25 ug/kg 20.0 , 127 10-169 Decachlorobiphenyl Batch 8L13034-EPA 3550B Blank(8L13034-BLK1) Prepared: 12/13/18 Analyzed:12/18/18 Aroclor 1016 ND 300 ug/kg Aroclor 1221 ND 300 ug/kg Aroclor 1232 ND 300 ug/kg Aroclor 1242 ND 300 ug/kg Aroclor 1248 ND 300 ug/kg Aroclor 1254 ND 300 ug/kg Aroclor 1260 ND 300 ug/kg Surrogate: 72.1 ug/kg 66.7 108 10-158 Decachlorobiphenyl mailing location P 951 653 3351 CA ELAP No.2698 P.O Box 432 6100 Quail Valley Court F 951 653 1662 EPA No.CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No.OR4035 LACSD No.10119 i 00 V BABCOCK Laboratories, Inc. The Standard of Excellence fir Over 100'Years Client Name: FGL Environmental, Inc. Analytical Report: Page 6 of 9 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP1815814-(2-11369) Santa Paula, CA 93060 Work Order Number: B8L0543 Report Date: 21-Dec-2018 Received on Ice(Y/N): Yes Temp: 7 °.0 Organochlorine Pesticides and PCBs by EPA 8000 Series-Batch Quality Control Spike Source %REC RPD Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch 8L13034-EPA 3550B LCS(8L13034-BSI) Prepared:12/13/18 Analyzed:12/18/18 Aroclor 1016 541 300 ug/kg 667 81.1 47.8-122 Aroclor 1260' 596 300 ug/kg 667 89.3 48.3-127 Surrogate: 76.1 ug/kg 66.7 114 10-158 Decachlorobiphenyl LCS Dup(8L13034-BSD1) Prepared:12/13/18 Analyzed: 12/18/18 Aroclor 1016 552 300 ug/kg 667 82.8 47.8-122 2.04 20 Aroclor 1260 598 300 ug/kg 667 89.7 48.3-127 0.397 20 Surrogate: 72.6 ug/kg 66.7 109 10-158 Decachlorobiphenyl Matrix Spike(8L13034-MSI)., Source:B8L0543-01 Prepared: 12/13/18 Analyzed:12/18/18 Aroclor 1016 556 3000 ug/kg 667 ND 83.4 23-195 Aroclor 1260 567 3000 ug/kg 667 ND 85.1 13.5-134 Surrogate: 69.4 ug/kg 66.7 104 10-158 Decachlorobiphenyl mailing location P 951 653 3351 CA ELAP No.2698 P.O Box 432 6100 Quail Valley Court F 951 653 1662 EPA No.CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No.OR4035 LACSD No.10119 - 00 B BABCOCK Laboratories, Inc. The Standard of Excellence jig Over 100 rears Client Name: FGL Environmental, Inc. Analytical Report: Page 7 of 9 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP1815814-(2-11369) Santa Paula, CA 93060 Report Date: 21-Dec-2018 Work Order Number: B8L0543 Received on Ice(Y/N): Yes Temp: 7 °C Notes and Definitions 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. NCALIm Calibration Verification recovery was below the method control limits for this analyte due to matrix interference carried over from analytical samples. NLpas The LCS and/or LCSD recovery for this analyte did not meet laboratory acceptance criteria.The data was accepted based on valid recovery of the remaining analyte(s) NMout The matrix spike and/or matrix spike duplicate performed on this sample did not meet laboratory acceptance criteria. QLpas The LCS and/or LCSD recovery for this analyte did not meet laboratory acceptance criteria.The data was accepted based on valid recovery of the remaining analyte(s) QMdil Due to sample dilution required from high analyte concentration and/or matrix interference,the Matrix Spike recovery for this analyte is not available. QMout MS and/or MSD recovery did not meet laboratory acceptance criteria. ND: Analyte NOT DETECTED at or above the Method Detection Limit(if MDL is reported), otherwise at or above the Reportable Detection Limit(RDL) NR: Not Reported RDL: Reportable Detection Limit MDL: Method Detection Limit */(Non-NELAP): NELAP does not offer accreditation for this analyte/method/matrix combination • mailing location P 951 653 3351 CA ELAP No.2698 P.O Box 432 6100 Quail Valley Court F 95i 653 1662 EPA No.CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No.OR4035 LACSD No.10119 040 B BABCOCK Laboratories, Inc. Th.e Standard of Excellence,fir Over 100 Tears Client Name: FGL Environmental, Inc. Analytical Report: Page 8 of 9 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP1815814-(2-11369) Santa,Paula, CA 93060 Work Order Number: B8L0543 Report Date: 21-Dec-2018 Received on Ice(Y/N): Yes Temp: 7 °C Approval Enclosed are the analytical results for the submitted sample(s). Babcock Laboratories certify the data presented as part of this report meet the minimum quality standards in the referenced analytical methods.Any exceptions have been noted. &&?Niad61&--. Alexis Nicole Harold For Cindy A.Waddell cc: e-Standard_No Alias.rpt This report applies only to the sample(s)analyzed.As a mutual protection to clients,the public,and Babcock Laboratories,Inc.,this report is submitted and accepted for the exclusive use of the Client to whom it is addressed.Interpretation and use of the information contained within this report are the sole responsibility of the Client.Babcock Laboratories,Inc.is not responsible for any misinformation or consequences that may result from misinterpretation or improper use of this report.This report is not to be modified or'abbreviated in any way. Additionally,this report is not to be used,in whole or in part,in any advertising or publicity matter without written authorization from Babcock Laboratories,Inc.The liability of Babcock Laboratories,Inc.is limited to the actual cost of the requested analyses,unless otherwise agreed upon in writing.There is no other warranty expressed or implied. • mailing location P 951 653 3351 CA ELAP No.2698 P.O Box 432 6100 Quail Valley Court F 951 653 1662 EPA No.CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No.OR4035 LACSD No.10119 B BABCOCK Laboratories, Inc. The Standarrl.of Excellence fir One 100 Mars Client Name: FGL Environmental, Inc. Analytical Report: Page 9 of 9 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP1815814-(2-11369) Santa Paula,CA 93060 Work Order Number: B8L0543 Report Date: 21-Dec-2018 Received on Ice(Y/N): Yes Temp: 7 °C 3 . . Subcontract to - `` Babcock Laboratories,Inc. :=:1210:5/201814:00 `® ■ ■ rff 1 f . Client: Fruit Growers Laboratory,Inc. Address:PGL Environmental,Inc. 853 Corporation St. a Santa Paula,CA 93060-3005 . Phone: Fax: ' a L Contact Person: & ua x Project Name: SY 1815814-(2-11369) 9 ¢ I Purchase Order Number: x Uso Samplers) OPS/US/BC 9. G W y o vt'di Z. 3, O v y o w � C � j v GO YJ Compositor Setup Date: I_! Time: / + ars p E a x o G 9 7 Lab Number; o a I. a g Sam Date Time $ a •a ac 0 U U Nunt Location Description Sam led Sam led y a u . N .5 N P P r a 10 •,?; v's,i in 5 Centrifuge Cake 11/29/18 11:00 G Sid • 1 1 Remarks: Relinquish' D.c: Time: Relinquished I ate Time: Relinquished Date: Time: tee C Received By: Do e: 1'i ine: Rea c Date: Time: Received By: Dam: Time: • On teeit) NO GSo J12Hig� v Samples lnta. YES NO tQmjP Vtc., PH m ailing location P 951 653 3351 CA ELAP No.2698 P.O Box 432 6100 Quail Valley Court F 951 653 1662 EPA No.CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No.OR4035 LACSD No. 10119. SOUTH TAHOE PUBLIC UTILITY DISTRICT i/O /0/ CHAIN OF CUSTODY South Tahoe Public Utility District :...: . -. .-;601 H 4 :•-... Lab Sent to: Fc) , L i::::iiiiiiIiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiggiiiiiiiii!iigiiiiiiniiiii:iiiiiiii6iggigliiiii Turnaround Tipe 1275 Meadow Crest Drive .... .• .. .---.,..: • ::.: South Lake Tahoe, CA 96150 ii •• •:-,i,....... ,•,-,i4,5: : .- ::• I....:...: „.,11,,....,-,-,...-,44,..:.: .."..: Sam!lep _,,.. ° . A k , i Standard Phone: (530)-543-6231 "--.k liricrty P ••• si x.,0 ). 9 i ), __ _ 24 Hr FAX: c530)7541-4296 ...........• •..„..., IIIIIIIIIIIIIIPIMIIIIII A ? 1.' . y, ( i, 1- hiiimingiiiiiiimomisiliiiiiiimusmilignigiiiiii &,,?, ,, -,. --eg. , 48 Hr 0 ii.gai:::i Cr)'i - r, u 0 eji :::::::::i::i::.:::::gimi::ii.iimi:::::.::••=imii•iii.i:.::imimim:.::gi-g:.:::.::i•i•:;0::.•::: Other ::::::::::::::::::::::::::::::•:•:•:•:•:•:::%.:•:::.:i:i::.:::•::i:!:::p:•448cd- ' 'L'" ', V f . .:.NRIERE:aftr,i:1:011Ptiiiin*MEME:M. iiggiignifigraiiiiiiiingiiiiraiiiiig igignignii:::i:8::•::::filigNENE::::.$;:Migigigliinnigla:.:::::: :•:illniiia:::0.:::::i i::::.:::::Bil.i::i.ii::i:::ii.i i.i.:::8:ne::::i.:::2:•:SiNE:13 -..;. ,..„->---- ',.. (...::. ''' '' 3 ::.:.0::..i.::::w...:::::::::::mimpim ,::::,:"::::temom ..:.::::::::.:.:::_iLii,::::: . __.::m ..,:ii.ii.:_:,Hp.,..,ii,..:::,::::..:„.igi .:...,,,::::::i.i.,:.:.,:i.:„,i:i:::::.:. Lu, WA;WIP.OE:HE•:iii.•::M::MMEgnni:.:d§iiV.4.1.0.::Mi'.: ::MME::MMUligE ii::E::::i.44.gt.CiTal:::)i.:101g:g..ifft.'0.Y..1:::::::: :::::::.NIMY:}0 * (-)fc-tt9 /1 /09 1---ci tvuJ 7/ ,.. / .,, • , - . —- 12 A 1 2) ----/ , 'kC . ((e2 2r, ",'-6„,- (4.3 -jriA,,, 1/4J-eitki 410 (,,,,I ivbi -zeI8 zquf. /la , 1111 '1.n ( ilf - ,. 1. ' ., - - ., _ 1 C.3 7,) .---a..,21..±C,...Y0tft tvakoq ct;'° 4 it-i.isimi'limiii..- . . . _. , t;\ . , ,. , III ' i ,zc ci :/,- .vc ,,,, ,7141( irilin. vtv/ ir v, vf. o• , -, t , v_. at i\p. , cc: _ • ...,_ 1,t, Millil ....... III 7738 4391 7558 1:-OR:011 Comments: / ' . - • 0 Report MTBE to 0.5 pg/L. Note any detection of MTBE a 0.2 pg/L Relinquished by Received. , Received by: 0 Analyze Travel and Field Blanks only if VOCs detected in samples. Signature V . A ,.f /r----ti - Signature iv- i 0 Use Calif State Write-On form to report results of Potable Water Wells Print 1/m rt 6,,h.etin 4 i.) r, Print Company South Tahoe Public Utility District Company Please Return all STPUD ice chests & Blue Ice. Data /11' 7...q'II Time_____ ()_ Date: Time :i:„.:.......,:.:,.....:•:•:::::„....::.:.„..::::::•:•:T::....::,,,,:i:i:i:i::::::::*i*i:i: .:-...:..,,:•:-.::::•:,.,•:i.::i:::i: . : .iiiif:::::::::i•::i::...:•::i::.:i:m•:,..::::::::::::::::::::,-;•,.:oi*i*x:i:i:i::.::.*:::.:::i::.:if:::::.:i:i:i::::g:::i Wiiiigit!'t;'..4.6.0.Plaing::ii.:Aill01.:00!R: iii.Miaggiiiiin::%00(0.0.niii.Miii.ili:::MiiiNigi.iii:: Relinquishid • Received by i.bA : Received intact Signature 6 )( Signature Received cold Print Print \ .i' ClAirtl)1/1\?f diAi( Company , Company (r 'I,' Custody seals Li Correct container Date: ,41.,, I Time \\Ssib Date: It M\itt Time 1 lisq \Lab\Forms\Chain of Custody.doc Page 1 of I Subcontract to Babcock Laboratories, Inc. Map Reft Client: Fruit Growers Laboratory,Inc. Address: FGL Environmental,Inc. 853 Corporation St. j Santa Paula,CA 93060-3005 a Phone: Fax: Contact Person: w ,f1 g4 Q a Project Name: SP 1815814- (2-11369) as �-' . ei a Purchase Order Number: c7 a ,n a' U W a� Sampler(s) OPS/US/BC W v w E u Cis, 1 Z. > o v0 , O U * a) * _C aa ): Compositor Setup Date: / / Time: / --- o co. 8 ,., 8 O b CO4. a o , B . 00E Lab Number: .d O o 0 Sam Date Time ,S ,9 H ._ U a U a Location Description a o .,s .0 N ,C) N Num Sampled Sampled E-� w �1 4 O �i o0o rn 02 5 Centrifuge Cake 11/29/18 11:00 G Sld 1 1 Remarks: Relinquished Date: Time: Relinquished Date: Time: Relinquished Date: Time: Received By: Date: Time: Received By: Date: Time: Received By: Date: Time: I d HEAVENLY VALLEY CREEK EMERGENCY RETENTION BASIN And HEAVENLY VALLEY CREEK MONITORING Monthly monitoring of Heavenly Valley Creek and the monitoring wells were performed throughout 2018. 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 2018 and the yearly averages since monitoring was initiated. Monitoring wells for buried sludge was initiated in 1992. The monthly results for 2018 are reported. 4 .} _ 4II 4 + tel•{ ,„Al... G r M , ,i ;..'�. t a ' F S 4 a ,'! •! • �} -•, : . T.. - •V . 'w , a'.,.. # '+,i, t:,1 ¢•o. t t a•• y,a3'.. s• ... +A 'Y' . .fT t,.. r, • • �... • .b,,,.'�+ l 1,ss i rr �9' At, *,,,,,,,74... R-4' ,.� 7 .^ °ar i 1.°; ^` '.a R i a�. ! •w . ;mows• ,,r < • # { r ` itip.111.. a,4.+Yat`tr aj ; ' „,,,,,,„:„k.74, , 'ft . 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Imagery Date Nov 1. 2007 tat 38.919987* ion-119 965368" elev 8331 ft Eye aft 9853 It { Site: HVC-1 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/13/2019 WATER QUALITY DATA Below Pioneer Trail HEAVENLY VALLLEY CREEK , Temp EC Chloride COD TKN NO3-N Date C pH umhos mg/L mg/L mg/L mg/L Note 01/17/2018 3.2 '7.18 58.7 0.968 <0.1 0.048 02/13/2018 0.1 7.24 114 1.05 3.5 0.069 03/20/2018 1.2 7.17 54.3 0.920 0.094 0.045 04/18/2018 2.5 7.42 49.0 0.887 0.094 0.020 05/15/2018 11.1 7.00 38.0 1.07 0.121 0.025 06/14/2018 9.4 6.75 31.0 0.658 0.116 <0.010 07/25/2018 12.5 7.12 54.3 0.730 0.097 0.014 08/21/2018 14.1 7.49 51.8 0.719 <0.050 0.022 09/28/2018 9.4 7.15 52.0 0.805 <0.050 0.021 10/23/2018 4.5 6.39 48.6 0.949 <0.050 0.025 11/21/2018 3.6 6.67 56.7 1.32 <0.050 0.056 12/18/2018 3.8 7.11 62.6 1.21 0.087 0.063 Maximum 14.1 7.49 114.0 . 1.32 0.0 3.5 0.069 Minimum 0.1 6.39 31.0 0.66 0.0 < 0.050 < 0.010 Average 6.3 7.06 55.9 0.90 0.587 0.037 #Tests 12 12 12 12 0 7 11 Temp pH EC Chloride COD TKN NO3-N Year C umhos mg/L mg/L mg/L mg/L Comments 1984 4.0 7.30 43.0 0.90 5.0 0.110 1985 3.7 7.39 50.0 1.30 6.0 0.180 1986 4.1 7.18 42.0 1.00 8.0 0.130 1987 4.7 6.70 77.0 5.50 5.0 0.200 1988 1.9 6.99 80.0 5.10 5.0 0.330 1989 4.8 7.14 59.0 1.50 6.0 0.150 1990 5.0 7.46 75.3 2.09 6.8 0.209 1991 5.6 7.34 84.9 2.44 6.3 0.153 1992 3.4 7.49 75.8 2.30 13.0 0.146 1993 5.5 7.25 57.8 1.67 9.1 0.120 0.093 1994 4.4 7.54 66.9 2.10 10.6 0.600 0.098 1995 5.1 6.80 55.8 1.85 10.6 0.335 0.085 1996 5.6 7.30 49.0 1.10 6.0 0.234 0.050 1997 6.1 7.25 42.0 0.90 6.0 0.294 0.070 1998 4.9 6.90 44.0 1.00 5.0 0.203 0.050 1999 5.2 6.97 43.7 0.99 5.3 0.218 0.079 2000 5.1 7.33 47.5 0.91 5.0 0.194 0.063 2001 6.3 7.30 56.6 1.39 5.5 0.147 0.113 2002 7.3 6.88 55.4 1.61 5.9 0.163 0.066 2003 6.7 7.12 58.1 2.75 10.4 0.199 0.099 2004 5.3 7.15 58.5 1.60 6.8 0.279 0.082 2005 5.3 7.29 50.6 1.50 13.3 0.209 0.073 2006 4.9 7.18 47.4 1.00 8.9 0.116 0.040 2007 6.1 7.12 57.8 1.40 11.2 0.148 0.077 2008 6.4 , 7.09 57.2 1.40 7.5 0.089 0.083 2009 5.5 7.20 56.0 1.50 14.6 0.145 0.070 2010 4.7 7.26 56.9 1.60 7.9 0.116 0.083 2011 4.7 7.16 49.2 0.90 8.7 0.179 0.038 2012 6.1 7.27 61.6 1.20 0.067 0.068 2013 • 5.8 7.33 66.6 1.40 0.090 0.124 2014 6.0 7.24 65.7 1.60 0.066 0.131 2015 6.4 7.42 70.0 1.60 0.130 0.088 2016 7.1 7.09 61.4 2.80 0.129 0.063 2017 6.7 7.15 48.1 0.80 0.153 0.022 2018 6.3 7.06 55.9 0.90 0.587 0.037 Maximum 7.3 7.54 84.9 5.50 14.6 0.600 0.330 Minimum 1.9 6.70 42.0 0.80 5.0 0.066 0.022 Average 5.3 7.19 57.9 1.70 7.8 0.200 0.102 #Years 35 35 35 35 28 26 35 Site: HVC-2 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/13/2019 WATER QUALITY DATA Upstream STPUD HEAVENLY VALLLEY CREEK Temp EC Chloride COD TKN NO3-N Date C pH umhos mg/L mg/L mg/L mg/L Note 01/17/2018 1.6 6.82 57.3 1.64 <0.1 <0.010 02/13/2018 0.4 6.65 67.0 2.05 1.7 <0.010 03/20/2018 1.3 6.63 57.5 1.76 0.162 0.016 04/18/2018 3.3 6.86 49.5 1.44 0.189 <0.010 05/15/2018 10.9 6.62 38.7 1.12 0.209 0.023 06/14/2018 13.0 6.47 35.0 0.644 0.194 <0.010 07/25/2018 13.5 6.82 55.0 0.759 0.253 <0.010 08/21/2018 16.7 7.17 61.7 0.772 0.252 <0.010 09/28/2018 Standing Water 10/23/2018 2.1 6.61 55.9 1.16 0.123 0.010 11/21/2018 Frozen 12/18/2018 2.3 6.36 63.8 1.60 0.186 0.011• Maximum 16.7 7.17 67.0 2.05 0.0 1.7 0.023 Minimum 0.4 6.36 35.0 0.64 0.0 <0.1 < 0.010 Average 6.5 6.70 54.1 1.29 0.363 0.015 #Tests 10 10 10 10 0 9 4 i • Temp pH EC Chloride COD TKN NO3-N • Year C umhos mg/L mg/L mg/L mg/L Comments 1984 4.5 7.07 44.0 1.40 6.0 0.090 1985 3.2 7.13 47.0 1.30 7.0 0.110 1986 3.3 6.75 43.0 1.60 19.0 0.170 1987 3.9 7.10 47.0 1.40 7.0 0.090 1988 0.9 6.67 56.0 2.50 7.0 0.070 1989 4.2 6.95 64.7 2.74 24.0 0.220 1990 5.2 6.89 63.2 3.14 24.6 0.064 1991 10.6 6.79 56.8 4.30 21.0 0.075 1992 No flow for entire year 1993 6.5 7.04 56.8 , 2.95 20.5 0.480 0.301 1994 3.9 7.11 68.7 2.52 15.3 0.057 1995 5.6 6.33 46.9 2.05 11.2 0.378 0.056 1996 6.2 6.92 47.0 1.50 12.0 0.386 0.020 1997 6.9 7.12 49.0 1.70 4.0 0.290 0.020 1998 5.1 6.78 48.0 1.50 6.0 0.277 0.010 1999 6.1 6.72 47.9 1.14 5.6 0.239 0.020 2000 4.3 7.05 47.2 1.32 7.4, 0.255 0.033 2001 5.3 6.97 51.6 1.78 7.6 0.265 0.015 2002 8.7 6.91 53.3 2.86 13.9 0.258 0.016 2003 10.2 6.73 59.5 4.12 20.6 0.377 0.056 2004 7.1 6.89 38.0 1.49 8.4 0.272 0.026 2005 6.6 6.78 41.4 1.53 21.8 0.504 0.043 2006 4.9 6.96 47.6 1.44 13.3 0.158 0.015 2007 4.6 7.04 49.2 1.39 10.1 0.156 0.019 2008 6.8 6.88 45.2 1.74 10.0 0.180 0.032 2009 6.4 6.72 41.1 1.63 16.3 0.328 0.014 2010 5.7 7.05 47.7 2.13 15.9 0.230 0.083 2011 5.2 6.74 49.2 1.13 15.2 0.143 0.018 2012 5.9 6.72 53.7 2.32 0.216 0.017 2013 5.7 6.67 53.9 2.83 0.168 0.026 2014 6.5 6.43 56.7 3.75 0.377 0.073 2015 8.7 6.65 42.2 1.38 0.404 0.197 2016 7.3 6.26 75.9 4.19 0.342 0.025 2017 7.6 6.66 46.2 1.41 0.192 0.015 2018 6.5 6.70 54.1 1.29 0.363 0.015 Maximum 10.6 7.13 75.9 4.30. 24.6 0.504 0.301 Minimum 0.9 6.26 38.0 1.13 4.0 0.143 0.010 . Average 5.9 6.83 51.2 2.10 13.0 0.290 0.062 #Years 34 34 34. 34 27 25 34 Site: HVC-3 SOUTH TAHOE-PUBLIC UTILITY DISTRICT 4/13/2019 WATER QUALITY DATA Below Meadow Crest Dr HEAVENLY VALLLEY CREEK Temp EC Chloride COD TKN NO3-N Date C pH umhos mg/L mg/L mg/L mg/L Note 01/17/2018 2.1 6.92 59.3 2.03 <0.1 0.010 02/13/2018 0.6 6.87 70.8 2.44 3.2 <0.010 03/20/2018 Frozen 03/21/2018 1.6 6.60 55.1 3.15 0.314 0.042 04/18/2018 2.8 7.01 52.2 1.68 0.168 <0.010 05/15/2018 7.5 6.57 38.3 1.15 0.194 0.021 06/14/2018 12.9 6.67 37.0 0.652 0.206 <0.010 07/25/2018 12 7.01 58.0 0.780 0.254 <0.010 08/21/2018 14.4 7.12 69.1 1.25 0.304 ' <0.010 09/28/2018 Dry 10/23/2018 Dry 11/21/2018 Frozen 12/18/2018 1.1 6.60 69.4 1.89 0.199 0.011 Maximum 14.4 7.12 70.8 3.15 0.0 3.2 0.042 Minimum 0.6 6.57 37.0 0.65 0.0 <0.1 < 0.010 Average 6.1 6.82 56.6 1.67 0.605 0.021 #Tests 9 9 9 9 0 8 4 Temp pH EC Chloride COD TKN NO3-N Year C umhos mg/L mg/L mg/L mg/L Comments 1984 4.6 7.05 50.0 1.90 7.0 0.100 1985 3.4 7.16 84.0 3.80 9.0 0.190 1986 4.1 6.73 93.0 11.80 25.0 0.590 1987 3.9 6.94 96.0 5.10 16.0 0.170 1988 0.9 6.65 241.0 17.70 22.0 1.220 ' 1989 4.8 7.01 152.0 12.40 38.1 0.320 1990 7.1 7.27 88.3 5.95 13.8 0.178 1991 7.5 6.90 161.7 12.18 15.5 0.165 1992 1.1 7.07 289.0 22.50 29.0 0.105 1993 6.0 7.08 88.8 4.20 21.8 0.770 0.247 1994 5.1 7.24 82.6 3.79 48.6 3.240 0.084 1995. 5.5 7.11 70.8 3.90 9.4 0.487 0.128 1996 6.0 6.88 49.0 1.70 12.0 0.314 0.040 1997. 6.6 7.05 51.0 1.80 4.0 0.290 0.020 1998 4.9 6.73 51.0 1.60 6.0 0.272 0.020 1999 5.5 6.81 50.7 1.37 5.6 0.255 0.018 2000 4.2 7.07 50.8 1.51 7.2 0.322 0.038 2001 7.3 6.66 63.3 2.34 7.0 0.334 0.011 2002 7.3 6.96 76:6 3.77 29.7 0.659 0.154 2003 6.7 6.82 97.3 5.38 20.7 0.455 0.262 2004 6.2 6.79 42.3 1.68 8.5 0.219 0.058 2005 5.5 6.83 49.3 1.73 16.0 0.386 0.145 2006 4.3 6.93 50.9 1.57 13.4 0.184 0.017 2007 3.9 6.89 52.1 1.59 10.0 0.133 0.022 2008 6.5 6.85 64.0 2.79 10.4 0.211 0.187 2009 5.8 6.85 55.3 4.08 17.8 0.307 0.098 2010 5.6 7.09 56.7 2.61 14.3 0.228 0.146 2011 5.0 6.89 51.0 1.27 13.5 0.330 0.023 2012 5.4 6.74 56.3 2.17 0.211 0.018 2013 5.5 6.81 59.5 3.85 0.190 0.032 2014 6.7 6.56 68.4 6.07 0.308 0.033 2015 7.6 7.27 46.8 1.90 0.476 0.174 2016 7.1 6.40 88.5 9.31 0.322 0.198 2017 8.1 6.83 52.2 1.51 0.185 0.021 2018 6.1 6.82 56.6 1.67 0.605 0.021 Maximum 8.1 7.27 289.0 22.50 48.6 3.240 1.220 Minimum 0.9 6.40 42.3 1.27 4.0 0.133 0.011 Average 5.5 6.91 81.1 4.81 16.1 0.450 0.150 • #Years 35 35 35 35 28 26 35 Site: HVC-5 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/13/2019 WATER QUALITY DATA Culvert Avove Meadow Crest Dr HEAVENLY VALLLEY CREEK Temp EC Chloride COD TKN NO3-N ' Date C pH umhos mg/L mg/L mg/L mg/L Note 01/09/2018 No Flow 01/17/2018 No Flow 02/13/2018 No Flow 03/10/2018 No Flow 03/13/2018 7.8 6.76 143 30.3 0.541 0.17 Stormwater Flow 03/20/2018 No Flow 03/21/2018 0.6 6.8 70.7 7.27 0.251 0.062 Stormwater Flow 04/18/2018 No Flow ' 06/14/2018 No Flow 07/25/2018 No Flow 08/21/2018 No Flow 09/28/2018 No Flow 10/03/2018 10.3 7.91 91.5 9.82 2.59 0.542 Stormwater Flow 10/23/2018 No Flow 11/21/2018 No Flow 11/23/2018 5.5 6.91 68.0 12.2 0.494 0.129 Stormwater Flow 12/18/2018 No Flow Maximum 10.3 7.91 143.0 30.3 2.590 0.542 Minimum 0.6 6.76 68.0 7.27 0.251 0.062 Average 6.1 7.10 93.3 14.9 0.969 0.226 #Tests 4 4 4 4 0 4 %4 Temp pH EC Chloride COD TKN NO3-N Year C umhos mg/L mg/L- mg/L mg/L Comments 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 8.0 7.53 80.0 3.70 18.0 0.910 0.240 1995 4.2 6.83 36.0 2.00 41.0 1.000 0.130 1996 5.3 7.28 69.0 8.40 31.0 0.963 0.350 1997 4.3 6.49 268.0 3.50 29.0 0.840 0.070 1998 0.7 6.50 133.0 5.20 27.0 0.910 1.780 1999 8.0 6.97 67.4 12.60 25.7 1.190 0.123 2000 4.4 6.67 31.1 15.35 21.2 0.639 0.236 2001 Dry 2002 4.9 6.74 30.1 1.10 92.9 1.460 0.352 2003 1.1 7.29 37.0 6.69 24.0 0.583 0.222 2004 Dry 2005 3.7 6.73 74.3 4.08 66.0 1.016 0.689 2006 6.1 7.23 112.0 3.49 45.7 0.568 0.455 2007 2.1 6.62 45.9 3.27 93.5 0.875 0.216 2008 Dry 2009 5.9 7.01 36.0 2.76 31.6 0.447 0.210 2010 6.2 7.18 174.3 33.92 97.3 0.846 . 0.539 2011 .6.3 6.64 66.7 3.72 208.0 0.980 0.441 2012 3.9 6.59 38.8 3.17 0.509 0.180 2013 15.7 5.89 50.7 4.34 1.880 0.401 2014 4.4 6.73 50.2 7.23 0.319 0.116 2015 9.5 6.08 33.8 8.46 1.201 0.069 2016 5.0 6.69 101.7 22.08 0.311 0.101 2017 5.9 6.43 50.7 8.41 0.823 0.187 2018 6.1 7.10 93.3 14.9 0.969 0.226 Maximum 15.7 7.53 268.0 33.92 208.0 1.880 1.780 Minimum 0.7 5.89 30.1 1.10 18.0 0.311 0.069 Average 5.5 6.78 76.4 8.11 56.8 0.875 0.333 #Years 22 22 22 22 15 22 22 • uhmos/cm CI, mg/L NO3-N, mg/L o O O O O ' N N W W ' -+ O O O O O O O O O O Ul O 01 O O O O O O O O 1984 1984 1984 1985 1985 1985 1986 1 1986 � 1986 1011111: 1987 1 1987 1987 , pot - ____________ 1988 1988 1988_ 1989 1989 • 1989 41 1990 1990 1990 1991 • 1991 1991 1992 ` 1992 1992 1993 rn 1993, 1993. 110 1994 CD 1994 1994 1995 P 1995 / 1995 Z �mi,■ 1996 = 111) 1996 = 1996 I n 1997_ I `I 1997 r.F• -; 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' 7� (....,,, �T R d p '''of''....., r ai , >4N�f5� aH ,,,.. ...,. .„,,, ,4 Ali 4.,:iiii4 'a ,..,,taiiii,..::i..;.i.. ,:::1,:..,..;:'..;;..::'';''.''' xY� .�J� , V. n y» .A:� F ,..,i.:::..;:•:.: ..,,::::.,:e..,:ii: 1*.'' if i''' '.,',i '44 ,,.,..--.....-'„ ;t.-':'''''''............ 14' -. fi,,,,.';', '''i ar, � .fi,,.x�� f r 4 ,.:,:f.'� �` d � ¢`: . 1L .:.,,,...;,..:...c.....;.4';,,. Y'r' _; id*.::'i. .f ' 71k 7r''°� ' ;tkr � st. oF o? $ + . .:., , N3:hll3y [1 K;� S. '''''''-'-';':'1!.;:::. .:.:; ,, s ff }:� a �.l �� 1,�?'r1.6.. ,.4 ,% y: k .: : 43. r � �...f. . A•.'4 ....*4.,;,..t.",...,.., .ATh t. 4 7xk • .P.o.•?, 4 p\ fr it ..-........"Q,-. '..-- . ,'' .,. t,. ' . . ;.. x 3>YA� s u f sE ' r. :,,,r.,, Yfik �!„ y. ,4,!7•,,..,.;,t:•,,•-l'-',-- 1,i. >YSi „6 ��firw�/: t � y r #y �y: �Mi �.�'} t yyYf eY :'< .. #h •: 9 r ;¢<.t . k" s w :Ra SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/13/2019 Site: CONTROL WATER QUALITY DATA Area: Emergency Pond MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 01/17/18 6284.80 9.3 6.79 245 17.6 5.17 ' 04/18/18 6284.29 10.1 7.09 248 18.9 5.15 08/13/18 6283.68 10.5 6.79 262 19.0 4.94 10/15/18 6282.90 10.2 7.14 260 19.3 4.84 Maximum 6284.80 10.5 7.14 262 19.3 5.17 Minimum 6282.90 9.3 6.79 245 17.6 4.84 Average 6283.92 10.0 6.95 254 18.7 5.03 #Tests 4 4 4 4 4 0 4 Mean Sea Temp 'EC Chloride COD NO3-N Year Level C pH umhos mg/L. mg/L mg/L Comments 1984 1985 1986 1987 6281.4 .9.1 6.87 137 3.6 6 0.64 1988 6277.4 9.2 6.84 115 0.6 . 7 0.10 1989 6279.1 10.4 7.18 118 0.6 6 0.24 1990 6274.0 9.7 7.27 120 0.9 5 0.44 1991 6273.3 9.3 7.21 118 1.4 < 5 0.61 1992 6272.2 9.4 7.44 123 1.2 5 0.73 • 1993 6273.1 9.9 7.25 131 1.4 5 1.01 1994 6275.2 11.0 7.11 143 1.8 6 1.50 1995 6277.7 9.5 7.07 153 2.7 7 2.03 1996 6282.9 9.6 7.05 162 5.7 3 2.66 1997 6285.5 10.1 6.89 173 5.6 4 2.64 1998 6284.0 9.8 6.66 170 5.8 < 5 2.39 1999 6284.3 9.3 6.70 175 6.8 6 2.43 2000 6282.8 9.4 6.83 174 7.4 < 5 2.40 2001 6280.5 9.4 6.87 173 8.1 5 2.34 2002 6278.7 9.6 6.89 176 8.1 6 2.36 2003 6278.4 10.2 7.02 182 8.6 5 2.60 2004 6278.7 9.1 6.91 182 9.4 6 2.91 2005 6279.3 9.2 7.01 189 9.8 8 3.18 x- 2006 6283.0 9.7 6.96 200 10.1 8 3.45 2007 6281.8 9.8 6.82 192 ' 10.5 6 3.40 2008 6279.6 10.1 6.96 190 10.9 5 3.42 2009 6278.6 9.8 6.81 204 11.7 6 3.72 2010 6278.6 9.9 6.79 217 12.6 5 4.00 2011 6281.6 9.7 6.84 225 13.1 8 4.28 2012 6281.6 9.7 7.19 226 15.1 4.70 2013 6279.6 9.8 7.39 230 15.6 4.69 2014 6278.4 9.6 7.00 , 236 16.0 4.55 2015 6277.1 10.4 6.87 240 16.0 4.60 2016 6277.1 9.0 6.96 240 16.4 4.71 2017 6282.9 9.0 6.95 244 15.9 4.97 2018 6283.9 10.0 . 6.95 254 18.7 5.03 r Maximum 6285.5 11.0 7.44 254 18.7 8 ' 5.03 Minimum 6272.2 9.0 6.66 115 0.6 3 0.10 Average 6279.5 9.7 6.99 182 8.5 6 2.77 #Years 32 32 32 32 32 25 32 , SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/13/2019 'Site: MW01.5 WATER QUALITY DATA Area: Emergency Pond MONITORING WELLS Mean • Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments ' 01/17/18 6269.52 8.6 7.11 166 2.21 0.437 04/18/18 ,6269.38 9.4 7.45 162 2.25 0.465 08/13/18 6269.11 9.9 7.08 170 2.17 0.405 10/15/18 6269.12 9.8 7.59 171 2.26 0.374 • Maximum 6269.52 9.9 7.59 171 2.26 0.465 Minimum 6269.11 8.6 7.08 162 2.17 0.374 Average 6269.28 9.4 7.31 167 2.22 0.420 4 4 4 4 4 0 4 Mean ' Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 1985 1986 6273.3 8.1 7.11 402 30.6 4 4.72 1987 _ 6272.9 9.1 6.87 355 23.7 5 2.79 1988 6271.6 9.7 6.97 327 20.7 8 2.21 1989 1990 1991 1992 1993 1994 1995 1996 1997 6270.4 9.6 7.02 196 6.0 4 0.970 1998 6269.5 9.0 6.98 165 4.3 < 5 0.670 1999 6275.9 9.3 7.03 171 3.4 < 5 0.680 2000 6268.9 9.4 7.08 170 3.0 6 0.650 2001 6268.5 9.3 6.80 157 2.6 5 0.510 2002 2003 2004 2005 6270.3 9.1 7.01 192 4.5 9 0.590 2006 6270.0 9.2 7.19 180 4.0 8 0.631 2007 6278.8 9.4 7.05 168 3.7 6 0.776 2008 6267.9 9.8 7.17 162 3.2 5 0.649 2009 6267.6 9.2 7.12 162 2.6 5 0.537 2010 6267.7 9.4 7.05 161 2.3 .5 0.480 2011 6268.3 8.9 6.97 174 2.4 10 0.482 2012 6268.4 9.1 7.19 159 2.3 0.475 2013 6267.7 9.0 7.10 162 2.1 0.457 2014 6267.4 9.0 7.18 163 2.2 0.405 2015 6267.2 8.8 6.96 172 2.2 0.462 2016 6267.4 8.8 7.09 159 2.2 0.451 2017 6269.3 9.2 7.15 179 2.1 0.414 2018 6269.3 9.4 7.31 167 2.2 0.420 J Maximum 6278.8 9.8 7.31 402 30.6 10 . 4.720 Minimum 6267.2 8.1 6.80 157 2.1 4 0.405 Average 6269.9 9.2 7.06 196 6.0 6 0.929 #Years 22 22 22 22 22 15 22 r SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/13/2019 Site: MW02-50 WATER QUALITY DATA Area: Emergency Pond MONITORING WELLS , Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 01/17/18 6269.35 9.9 6.48 307 32.2 3.40 04/18/18 6269.27 10.2 6.81 304 33.9 3.25 08/13/18 6268.96 12.1 6.38 302 29.0 2.80 10/15/18 6269.03 9.5 6.93 304 31.0 2.70 I Maximum 6269.35 12.1 6.93 307 33.9 3.40 Minimum 6268.96 9.5 6.38 302 29.0 2.70 Average 6269.15 10.4 6.65 304 31.5 3.04 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 6284.1 1985 1986 6271.7 8.6 6.56 470 46.3 4 12.28 1987 6272.4 10.5 6.51 584 63.3 7 12.72 1988 6273.3 10.7 6.60 574 60.8 9 9.68 1989 6265.9 8.6 8.53 630 62.5 5 13.51 1990 Dry 1991 Dry 1992 Dry 1993 Dry 1994 Dry 1995 Dry 1996 6269.4 9.3 6.78 528 53.2 2 12.40 1997 6270.3 10.4 6.53 588 59.2 4 13.92 1998 6269.1 10.1 6.53 557 55.0 < 5 12.82 1999 6269.2 9.8 6.41 456 43.3 6 10.22 2000 6268.5 10.2 6.69 404 37.6 5 8.60 2001 6268.3 10.3 6.59 391 36.9 5 8.40 2002 Dry 2003 Dry 2004 'Dry 2005 6270.1 9.9 6.53 535 52.0 12 15.16 2006 6269.9 10.4 6.37 614 53.9 10 18.35 2007 6268.6 10.5 6.31 573 52.7 8 14.98 2008 6268.0 10.7 6.59 438 42.7 5 9.48 2009 6266.7 10.6 6.49 389 39.2 6 7.35 2010 6265.9 10.3 6.50 364 37.9 7 6.38 2011 6268.6 10.0 6.54 358 36.9 13 5.84 2012 6268.2 10.2 6.46: 348 39.0 5.16 2013 6267.1 10.0 6.66 334 37.2 4.39 2014 6266.7 10.1 6.77 326 37.6 3.88 2015 6266.5 10.3 6.73 323 36.6 3.25 2016 6266.2 9.9 6.69 312 36.2 2.93 2017 6269.0 9.7 6.68 312 29.9 2.69 2018 6269.2 10.4 6.65 304 31.5 3.04 • Maximum 6284.1 10.7 8.53 630 63.3 13 18.35 Minimum 6265.9 8.6 6.31 304 2,9.9 2 2.69 Average 6269.3 10.1 6.65 446 45.1 7 9.06 #Years 25 24 24 24 24 17 24 i' SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/13/2019 Site: MW03-50 WATER QUALITY DATA Area: Emergency Pond MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments ,, 01/17/18 6269.40 9.5 6.14 604 131 0.748 04/18/18 6269.29 9.8 6.28 540 119 0.819 08/13/18 6268.83 10.6 6.09 479 88.2 0.760 10/16/18 6269.10 8.8 6.52 449 80.6 0.949 ( Maximum 6269.40 10.6 6.52 604 131.0 0.949 Minimum 6268.83 8.8 6.09 449 80.6 0.748 Average 6269.16 9.7 6.26 518 104.7 0.82 4 4 4 4 4 0 ' 4 • Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 6275.7 9.4 6.40 431 45.7 16 7.19 1985 6270.5 10.8 6.46 418 36.6 25 9.84 1986 6273.9 10.7 6.21 443 41.4 10 5.37 1987 6272.7 10.4 6.29 518 59.2 9 1.63 1988 6269.4 11.1 6.28 653 68.9 6 1.79 1989 6265.9 11.7 6.39 738 67.3 8 0.88 1990 6265.4 11.3 6.44 814 66.2 10 2.24 1991 6265.1 10.6 . 6.52 713 63.6 8 0.75 1992 6265.2 10.2 6.57 668 61.4 9 1.41 1993 6266.1 10.8 6.41 636 57.9 8 1.51 1994 6265.4 10.9 6.45 645 60.5 8; 1.34 1995 6267.3 9.8 6.51 578 53.2 9 6.78 • 1996 6269.1 10.4 6.26 539 55.0 3 13.48 1997 6270.4 10.4 6.20 595 51.3 4 21.33 1998 6269.2 10.2 6.11 493 46.5 < 5 11.17 1999 6269.2 9.8 6.11 400 38.3 5 4.53 2000 6268.5 10.3 6.46 381 32.0 5 4.85 2001 6268.0 10.6 6.33 494 42.6 5 18.51 2002 6267.6 10.6 5.96 671 55.8 7 28.95 2003 6267.5 10.8 6.11 623 60.4 5 22.14 2004 6267.4 9.9 6.27 531 50.9 6 16.43 2005 6270.6 10.4 6.33 513 49.9 10 21.70 2006 6270.1 10.6 6.22 542 61.0 9 17.00 2007 6268.8 10.8 6.10 500 67.5 7 10.30 2008 6268.0 11.0 6.59 429 63.1 6 5.90 2009 6267.8 10.3 6.50 480 58.3 6 14.10 2010 6267.7 10.7 6.48 493 62.4 7 17.10 2011 6268.8 10.5 6.36 469 63.7 10 11.60 2012 6268.3 10.6 6.35 396 53.9 5.10 2013 6267.6 10.8 6.40 484 51.6 16.70 2014 6267.2 10.2 6.16 598 53.2 27.50 2015 6267.0 10.3 6.15 i 560 47.4 23.10 2016 6267.3 10.0 6.23 474 41.6 14.60 2017 6269.4 10.0 6.33 504 84.7 5.00 2018 6269.2 9.7 6.26 518 104.7 0.82 Maximum 6275.7 11.7 6.59 814 ' 104.7 25 28.95 Minimum 6265.1 9.4 5.96 381 32.0 3 0.75 Average 6268.5 10.5 6.32 541 56.5 8 10.65 #Years 35 35 35 35 35 28 35 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/13/2019 Site: MW04-50 WATER QUALITY DATA Area: Emergency Pond MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 01/17/18 6270.89 7.9 6.11 98.4 9.20 0.057 04/18/18 6271.00 8.1 6.10 101 9.62 0.078 08/13/18 6270.54 10.2 6.10 98.9 7.95 0.054 10/16/18 6270.05 7.8 6.79 94.7 7.33 0.066 Maximum 6271.00; 10.2 ' 6.79 101.0 9.62 0.078 Minimum 6270.05 7.8 6.10 94.7 7.33 0.054 Average 6270.62 8.5 6.28 98.3 8.53 0.064 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 6266.6 11.4 6.68 90 1.8 3 0.330 1985 1986 6266.9 7.2 6.18 75 3.8 4 0.570 1987 6265.6 8.9 6.14 208 31.7 6 1.720 1988 6263.8 8.7 5.96 306 44.9 8 1.350 1989 6261.6 9.5 6.12 284 36.5 6 1.190 1990 6263.0 8.7 6.20 272 35.9 6 1.494 1991 6263.2 8.5 6.39 286 46.6 5 1.047 1992 6261.8 8.4 6.23 358 55.8 6 0.686 1993 6263.4 9.0 6.19 217 25.6 6 0.637 1994 6263.7 9.1 6.16 190 21.9 7 0.565 1995 6267.5 8.6 6.70 146 12.9 11 0.365 1996 6269.5 8.7 6.38 85 4.8 3 0.070 1997 6271.4 8.9 6.37 77 5.3 4 0.070 1998 6270.1 8.4 6.15 140 6.0 < 5 0.060 1999 6270.1 8.6 6.04 77 5.5 < 5 0.070 2000 6267.9 8.3 6.58 76 5.3 < 5 0.070 2001 6267.6 9.1 6.48 77 4.8 < 5 0.100 2002 6267.3 8.8 6.06 80 4.4 6 0.100 2003 6267.6 9.1 6.32 79 5.5 5 0.080 2004 6267.8 6.6 6.27 74 4.2 5 0.050 2005 6269.8 8.7 6.32 80 4.2 9 0.061 2006 6271.8 8.9 6.48 81 6.2 8 0.026 2007 6269.4 9.1 6.57 81 6.6 6 0.027 2008 6268.7 9.1 6.78 80 6.5 5 0.027 2009 6268.3 8.7 6.21 80 5.9 7 0.037 2010 6268.6 9.0 6.14 82 5.5 6 0.037 2011 6271.0 9.1 6.11 81 5.4 6 0.037 2012 6269.4 8.6 6.19 79 6.3 0.042 2013 6268.8 8.9 6.17 78 5.4 0.116 2014 6268.3 8.9 6.31 81 5.1 0.298 2015 6267.9 8.9 6.27 91 4.9 0.608 2016 6268.4 9.0 6.16 90 4.9 0.826 2017 6269.0 6.6 6.33 100 9.3 0.071 2018 6270.6 8.5 6.28 98 8.5 0.064 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 6267.5 8.7 6.29 129 13.2 6 0.379 #Years 34 34 34 34 34 27 34 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/13/2019 Site: MW07-50 WATER QUALITY DATA Area: Emergency Pond MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 01/17/18 6280.62 7.9 7.34 175 11.0 0.449 04/18/18 6280.69 7.6 7.78 179 11.3 0.457 08/13/18 6279.87 10.6 7.42 180 10.9 0.436 10/16/18 6279.38 6.9 7.76 183 10.9 0.415 Maximum 6280.69 10.6 7.78 183 11.3 0.457 Minimum 6279.38 6.9 7.34 175 10.9 0415 Average 6280.14 8.3 7.58 179 11.0 0.439 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 6282.7 1985 1986 6280.7 1987 "6277.4 7.4 6.61 293 28.2 6 0.570 1988 6274.1 7.6 6.64 291 28.3 8 0.560 1989 6271.1 7.6 6.65 287 • 28.7 6 0.580 1990 6273.3 7.0 6.69 287 28.3 6 0.609 1991 6270.8 7.7 6.83 287 30.3 7 0.492 1992 6268.8 6.7 6.71 282 29.8 6 0.497 1993 6270.9 7.6 6.67 297 29.3 7 0.484 1994 6272.5 8.2 6.68 287 29.2 8 0.527 1995 6275.2 7.6 6.81 282 30.0 \ 8 0.548 • • 1996 6279.2 8.1 6.48 281 28.9 4 0.560 1997 6281.1 8.2 6.50 278 28.4 4 0.560 1998 6280.2 8.0 6.34 274 27.8 < 5 0.610 1999 6280.2 8.1 6.28 268 25.9 5 0.590 2000 6279.1 7.9 6.53 260 25.2 5 0.620 2001 6277.4 7.9 6.43 251 24.1 5 0.610 2002 6276.3 7.8 6.41 247 22.2 7 0.570 2003 6276.3 8.1 6.36 244 21.7 5 0.580 2004 6276.2 7.7 6.37 234 20.9 6 0.600 2005 6277.3 7.7 6.55 228 •20.1 13 0.558 2006 6279.8 8.5 6.57 227 18.7 10 0.545 2007 6278.5 8.0 6.20 237 18.5 7 0.565 2008 6277.2 8.7 6.41 232 18.3 5 0.556 2009 6276.5 8.0 6.41 223 17.6 7 0.544 2010 6276.8 8.1 6.34 216 16.3 8 0.534 2011 6279.1 8.0 6.32 206 15.1 7 0.493 2012 6278.5 8.1 6.77 202 14.8 0.525 2013 6277.2 8.3 6.55 198 13.9 0.505 2014 6275.9 8.2 6.79 196 13.8 0.490 2015 6275.2 9.5 7.30 196 12.8 0.469 2016 6274.3 8.8 7.11 194 12.7 0.467 2017 6280.8 7.8 6.87 181 11.2 0.443 2018 6280.1 8.3 7.58 179 11.0 0.439 Maximum 6282.7 9.5 7.58 297 30.3 13 0.620 Minimum 6268.8 6.7 6.20 179 11.0 4 0.439 Average 6276.8 8.0 6.62 245 21.9 7 0.541 #Years 34 32 32 32 32 25 32 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/13/2019 Site: MW08-25 WATER QUALITY DATA Area: Treatment Plant MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments. 01/17/18 6247.71 9.8 6.18 446 21.1 0.026 04/18/18 6247.89 8.4 6.39 329 11.6 < 0.010 08/13/18 6246.67 10.7 6.91 806 22.5 < 0.020 10/16/18 6245.96 11.6 7.23 807 23.4 0.029 Maximum 6247.89 11.6 7.23 807 23.4 0.029 Minimum 6245.96 8.4 6.18 329 11.6 < 0.010 Average 6247.06 10.1 6.68 597 19.7 0.021 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 6246.0 9.2 6.30 878 136.1 75 0.250 1985 6247.8 9.9 6.41 876 143.0 72 0.570 1986 6247.2 9.8 6.38 878 126.4 72 0.570 1987 6246.5 9.2 6.28 811 119.0 59 0.280 1988 6247.4 9.4 6.37 828 102.0 57 0.180 1989 6247.7 10.2 6.33 753 101.0 57 0.080 1990 6247.4 9.3 6.35 742 93.5 50 0.094 1991 6246.8 8.7 6.40 701 84.8 43 0.067 1992 6246.6 8.0 6.50 766 73.1 56 0.064 1993 6246.9 8.8 6.38 715 54.9 61 0.014 1994 6246.8 9.5 6.35 827 50.1 65 < 0.010 1995 6248.5 8.9 6.48 830 41.2 72 0.020 1996 6248.3 9.8 6.39 940 42.3 81 0.030 1997 6248.2 10.1 6.33 971 51.3 76 0.010 1998 6248.2 9.7 6.24 1016 50.2 79 s 0.020 1999 6248.2 9.7 6.25 1017 49.9 85 '< 0.010 2000 6247.3 10.2 6.36 1011 50.3 87 < ,0.010 2001 6246.4 10.0 6.38 1017 51.3 86 0.040 2002 6246.5 10.0 6.34 967 41.3 90 0.030 2003 6246.8 9.9 6.44 960 36.6 91 0.020 2004 6246.3 9.7 6.43 907 32.4 93 0.020 2005 6247.4 9.4 6.47 828 29.7 90' 0.026 2006 6247.9 9.7 6.47 918 27.7 92 0.018 2007 6246.5 10.3 6.37 956 27.6 102 0.018 2008 6244.7 10.8 6.55 872 22.9 93 0.021 2009 6245.5 10.3 6.18 759 20.1 77 2.988 2010 6246.4 9.3 5.80 528 21.7 48 5.659 2011 6247.4 9.3 5.96 489 12.2 26 0.140 2012 6246.4 9.7 6.28 724 17.80.074 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 Maximum 6248.6 10.8 6.68 1017 143.0 102 6.728 Minimum 6244.3 8.0 5.75 348 11.3 26 < 0.010 Average 6246.9 9.7 6.34 804 51.9 73 0.549 #Years 35 35 35 35 35 28 35 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/13/2019 Site: MW11 WATER QUALITY DATA Area: Buried Sludge n , MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos' mg/L mg/L mg/L Comments 01/17/18 6269.40 8.8 6.12 237 35.6 0.047 04/18/18 6269.66 9.3 6.10 246 35.3 0.051 08/15/18 6269.04 10.1 6.15 214. 25.2 0.058 10/16/18 Well Damaged 10/30/18 6268.36 9.8 6.18 237 34.5 0.049 Well Repaired Maximum 6269.66 10.1 6.18 246! '35.60 0.058 Minimum 6268.36 8.8 6.10 214 25.20 0.047 Average 6269.12 9.5 6.14 .234 32.65 0.051 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 1985 • 1986 1987 1988 1989 1990 1991 • 1992 6257.3 8.9 7.25 159 1.4 . 5.820 1993 6257.5 9.1 7.15 202 1.0 9.220 1994 6258.5 8.1 7.13 172 0.9 5.830 1995 ; 6260.7 8.8 6.98 139 1.5 3.080 1996 6265.0 8.7 6.74 97 1.7 0.170 1997 6268.7 9.3 6.77 88 1.7 0.120 1998 6268.5 8.6 6.53 86 1.2 _ 0.300 1999 6269.2 8.4 6.46 81 1.2 6 0.120 2000 6267.5 8.5 6.84 78 0.9 5 0.100 2001 6264.4 8.6 . 6.73 81 1.1 5 0.070 2002 6262.3 8.5 6.67 100 1.4 7 • 0.160 2003 6261.1 8.8 6.73 103 1.5 6 0.180 2004 6261.8 4.7 5.70 59 0.7 3 0.260 2005 6262.2 9.2 6.83 108 1.2 11 0.563 . 2006 6266.5 . 9.4 6.54 136 1.7 9 0.228 2007 6266.1 9.0 6.42 132 2.5 8 0.218 2008 6263.9 9.5 6.63 119 ' 1.6 5 0.165 2009 6262.1 10.2 6.56 110 1.4 7 0.184 2010 6261.1 9.1 6.64 113 1.3 7 0.163 2011 6264.0 9.1 6.40 159 4.2 8 0.120 2012 6264.9 9.5 6.28 170 5.7 0.114 2013 6263.0 9.4 6.56 139 2.7 0.116 2014 6261.3 9.3 6.66 131 2.5 0.101 - 2015 6259.9 10.0 6.44 123 1.8 0.123 2016 6259.1 10.7 6.39 109 1.5 0.308 2017 6265.8 9.1 6.42 213 22.3 0.150 2018 6269.1 9.5 6.14 234 32.7 0.051 Maximum 6269.2 10.7 7.25 234 32.7 11 9.220 Minimum 6257.3 4.7 5.70 59 0.7 . 3 0.051 Average 6263.4 9.0 6.61 127 3.7 7 1.038 #Years 27 27 27 27 27 13 27 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/13/2019 Site: MW12 WATER QUALITY DATA Area: Buried Sludge MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 01/17/18 6265.47 11.1 6.45 718 29.3 8.44 04/18/18 6268.49 11.6 6.60 648 27.4 5.42 08/15/18 6266.06 12.5 6.57 449 25.4 2.76 10/16/18 6264.91 12.5 6.77 549 29.6 3.76 Maximum 6268.49 12.5 6.77 718 29.60 8.44 Minimum 6264.91 11.1 6.45 449 25.40 2.76 Average 6266.23 11.9 6.60 591 27.93 5.10 4 ,4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 1985 1986 1987 1988 1989 1990 1991 1992 6259.7 10.2 6.46 169 2.9 1.55 1993 6261.1 9.8 6.47 500 6.4 4.72 1994 6260.5 9.0 6.42 353 3.8 4.22 1995 6263.7 9.3 6.60 646 5.6 4.03 1996 6265.4 9.4 6.48 477 4.3 3.23 1997 6266.8 10.1 6.57 257 3.0 0.79 1998 6266.4 9.2 6.31 205 2.9 0.35 1999 6266.7 8.7 6.16 167 2.3 8 0.17 2000 6265.6 8.9 6.42 143 1.9 6 0.21 2001 6262.7 9.1 6.47 105 1.8 6 0.43 2002 6262.3 9.5 6.19 113 1.6 6 0.56 2003 6262.4 9.6 6.18 155 2.0 6 0.93 2004 6262.4 9.2 6.25 186 2.0 .6 1.85 2005 6262.7 10.0 6.27 311 3.3 12 2.49 2006 6265.6 10.7 6.43 648 5.1 15 2.61 2007 6263.8 10.5 6.18 323 3.0 9 1.74 2008 6262.5 10.8 6.28 228 2.3 6 1.18 2009 6261.6 12.1 6.25 265 2.3 9 1.43 2010 6261.5 10.3 6.34 368 2.8 8 3.67 2011 6263.8 11.4 6.41 696 7.4 13 7.45 2012 6263.0 10.9 6.44 382 8.2 3.31 2013 6262.0 12.3 6.39 283 5.9 1.45 2014 6260.8 11.7 6.45 327 4.3 3.57 2015 6259.0 9.2 6.63 133 1.3 1.44 2016 6259.1 12.4 6.54 937 6.8 38.10 2017 6265.0 10.9 6.48 957 20.1 20.16 2018 6266.2 11.9 6.60 591 27.9 5.10 Maximum 6266.8 12.4 6.63 957 27.9 15 38.10 Minimum 6259.0 8.7 6.16 105 1.3 6 0.17 Average 6263.0 10.3 .6.40 368 5.2 8 4.32 #Years 27 27 27 27 27 13 27 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/13/2019 Site: MW13 WATER QUALITY DATA Area: Buried Sludge MONITORING WELLS i Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 01/17/18 6257.19 6.4 7.22 589 29.6 8.48 04/18/18 6258.85 5.8 7.02 639 16.4 3.11 08/15/18 6256.41 10.4 7.39 657 35.9 3.68 10/16/18 6256.14 - 8.4 7.24 648 31.3 2.34 Maximum 6258.85 10.4 7.39 657 35.9 8.48 Minimum 6256.14 5.8 7.02 589 16.4 2.34 Average 6257.15 7.8 7.22 633 28.3 4.40 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 1985 1986 1987 1988 1989 1990 1991 • 1992 6255.0 8.9 6.82 1071 12.1 6.79 1993 6256.8 7.3 6.85 1310 6.3 43.39 1994 6255.3 7.8 6.82 942 6.3 17.72 1995 6257.4 7.2 6.83 1053 5.9 20.43 1996 6257.9 7.9 6.85 827 3.6 8.71 1997 6257.9 8.4 6.79 814 4.9 6.16 1998 6258.0 7.6 6.78 802 3.7 5.16 1999 , 6257.9 7.4 6.88 746 4.0 23 4.23 2000 6257.1 6.7 6.91 689 2.9 14 2.57 2001 6255.8 6.8 6.76 708 4.3 19 3.99 2002 6256.2 7.1 6.90 801 4.2 21 10.08 2003 6256.8 7.5 6.95 904 4.6 21 14.79 2004 6256.5 7.6 6.86 666 4.1 19 10.62 2005 6257.2 7.6 7.04 728 5.4 21 10.27 , 2006 6257.5 8.2 6.83 828 4.0 23 10.71 2007 6256.5 7.8 6.89 748 4.9 19 9.65 2008 6256.9 9.0 6.91 722 '6.4 1 14 10.04 2009 6255.2 8.1 6.89 674 9.1 17 8.93 2010 6256.4 7.7 6.95 750 9.8 20 14.14 2011 6257.2. 8.1 6.80 844 15.4 23 17.37 2012 6256.0 7.6 7.00 685 19.4 11.04 2013 6255.8 8.8 7.17 695 19.2 7.03 2014 6255.3 8.7 7.03 615 18.5 4.18 2015 6254.0 9.0 6.82 617 20.9 2.50 2016 6256.1 8.5 6.79 744 23.2 21.59 2017 6258.0 7.3 7.22 812 21.7 11.15 2018 6257.2 7.8 7.22 ' 633 28.3 4.40 i , Maximum 6258.0 9.0 7.22 1310 28.3 23 43.39 Minimum 6254.0 6.7 6.76 615 2.9 14 2.50 Average, 6256.6 7.9 6.91 794 10.1 20 11.02 #Years 27 27 27 27 27 13 27 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/13/2019 Site: WATER QUALITY DATA Area: MONITORING WELLS Temp EC Chloride COD NO3-N Date C pH umhos mg/L mg/L mg/L Comments No sample collected for 2018. Maximum 0.0 0.00 0 0.0 0 0.000 Minimum 0.0 0.00 0 0.0 0 0.000 Average 0 0 0 0 0 0 Temp EC Chloride COD NO3-N Year C pH umhos mg/L mg/L mg/L Comments 1984 1985 1986 9.0 7.35 622 81.2 66 0.580 1987 10.7 7.30 575 62.1 192 0.200 • 1988 4.6 6.50 713 108.9 35 1.240 1989 1990 6.85 325 25.8 125 0.080 1991 1992 1993 17.1 7.15 551 64.5 46 0.210 1994 20.7 9.47 484 72.2 20 0.100 1995 16.6 7.90 470 55.0 48 0.060 1996 12.2 7.33 434 40.9 29 0.540 1997 8.1 7.14 415 44.2 45 0.070 1998 21.9 6.63 556 44.9 24 0.040 1999 Dry 2000 ' 2001 18.9 7.91 596 60.2 42 0.120 2002 Dry 2003 Dry 2004 3.0 3.37 174 20.2 9 0.040 2005 15.4 7.59 599 57.9 39 0.798 2006 16.78 MG stored 2007 Dry 2008 3.51 MG stored 2009 16.4 - 7.25 569 60.4 61 0.084 2010 19.6 7.81 629 45 2011 4.8 7.63 481 37.4 26 0.108 2012 Dry 2013 Dry 2014 14.4 7.47 607 67.3 0.423 2015 Dry 2016 17.5 7.56 678 64.7 1.332 2017 1.1 6.84 86 9.9 0.109 . 2018 No Sample Maximum 21.9 9.47 713 108.9 192 1.332 Minimum 1.1 , 3.37 86 9.9 9 0.040 Average 12.9 7.21 503 54.3 53 0.341 #Years 18-- 19 19 18 16 18 • -.ERB and Plant Monitoring Wells WATER LEVEL WATER LEVEL Mean Sea Level Mean Sea Level _ g 6290- 1 6285_ -- - - - • 6280 -- - - -- ------------- - , 6285- - - - 6275= - - -- ----- - --- - 6280; �► 6270= .. - - -- -- -- - a) 6275_ CD CD 6265_ -- __ -- -- - - LL _ U- T 6260 _ - - --- -- ------- 6270 _ _- [ : 6255- -- -- ---------i 6265- - . 6250 . - --- -- - 6260 - - I 6245 ----g 6255 , , , r , , , , 6240 - , , -. , , , , , , , , , , , , , . ,-- OOrmOO � NN a g 6) ti-, WWO O N 2 O 2 2 8 O m O - N ' d ' "ON m V 2 mE NA E, m O N 'A 2 2 O N m �Wm m m m .m rQm .m XN7W n 0W rO W W NOOO NOOONNOOOOONNOON O� `m- .' T- F2 , m �foNOONNOOOO • --• —Control —+--MWO1.5 --a—MWO2 ---MWO3 --a—MWO4 —A—MWO7 .—a—MWO8 NITRATE-NITROGEN NITRATE-NITROGEN ..�,�,. ..,........ 55 1 , 25_ 4 --- - - -- - 20- i Ilk 4, li . - . TIAL iiiiiikiiHr .• Illi 3 i _ J cp 15C7) _ 2 - - - --1 10 Y V , 5_ -�� A - 3 '111111191.111111111111111111110.1fr 0 ,- , r , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , 0 Qm m oNrn Q0 W m o N40 WON < V rn rn `O N m fm mrn o N v 0 N O N0 0 00 N0 rn- rn-- rn� rn-- .rnm- r00-) 000N0 N 0 0 0 _ 0 • t Control —*—MWO1.5 —a—MWO2• —a—MWO3 --♦—MWO4 —a--MWO7 —E-MWO8 . • • ERB and Plant Monitoring Wells . • CHLORIDES ---- -- ---CHLORIDES ._ _. 150 •-- y..... �.� . --- = _, 90_ - .- 140 - - - --- - 130 = 120 ---- ----------- - 70 _ 110 - --- - - ------------- ---- ---- 100 - - -- ----- - - --- - -- ---- Y / \ 111I::r 80 - -- - - --- -- - - • CO 1 40_ 60 = ---- - 30 50 2U_ - 30 _ AMA a _ 20 = 10 - - -- - - ' - , , 1 , ' WV cW WO m m 0 W0r7 W OON O O o OO OO ONN c9",9 O WO O E E' rnO rn O O omp O O O O oO O _N O O N - —4--Control --♦—MW01.5 —*—MWO2 --s—MWO3 —♦—MWO4 -*---MWO7 --.--MWO8 — - - - - - — — CONDUCTIVITY CONDUCTIVITY a . 1200 ._....,.,.�w... __w_w_y a.__ _.._, w�,_�_...___ ,_.�.._�n _...___..�..._. .�, 900 - i - 800 1000 - -- - -- A • 700 - -- - - f 800 -- ---------- - -- - -- - 4 co 600 - w Ily W N ---- --------- -- ---------- ------- = 500 C t ® / 600 __` 400 a 300 Ail 400 - - ----- -- - -- - .w 200 Pliori _.is- 200 --- - 100 - Q , r . . . . r . , . . . . . . , . . r 1 Y0O m NW 8 w ON3 O OON � 0OO0 3; O � O N O O m0. rNfi0-. m -i 0N� .V . m m mN 0 0 N 0 N 0 0 o rn� m rn �rn rn rnr �rn srn N 0 0 N N 0 0N 0 0 N LI --- Control —0—MWO1.5 --- MWO2 —i—MW03 -f—MWO4 —sir—MWO7 —6--MWO8 mg/L Feet . O CJl O C11 O CT N NN N N N N N CJI O 011 O C.31 CT1 0, O C�77 CO 1992 1 1-1 1 1 1 1 1 1 1 1 1'1 1 1 1 1 4 1 1 1 1 1 1 1 1 1 1 1993 1992 1994 01111 • 1993 1995 1994 1996 �� 1995 1996 1997 1997 1998 f 1998 1999 _ 2000 1 f 1 1999 . 2000 2001. I Ci 2001 1 '� 2002 € 0 < I M D _1 p 2002 2003 = - a) it r 20036 m • 2004 O TI 2004CD 73 K 2005 1 v 2005 r rn N (1:1 2006illiirn * 2006 , d < C 2007 _ m N 2007 Y r 2008 2008 • 2009If 2009 2010 CC:C 2010 W 2011 j 2011 2012 0., 2012 2013 (41:111;11114 ' I /I" 1 2013 2014 2014 2015 :::- 2017 20162017 ' 2018 2018 �■ • . /D "' E O • M pl. 0 umhos mg/L O O WO O On O O O O O O N W O O O JO N N W W A CJt C71 O CJ1 O C51 O CJl O O O O O O O O O O O O O O O O O -1111 1111,1111 1141 IV! 1111 Ilii }III 1111 1111 1111 1111 1141 IIII 1111 1111 1111 ilii 1141-M Y!Illi 4114 1411 1111 till 1992 1992 Cl)1993 • V+ 1993 1994 1994 - 1995 ' 1995 • • 1996 ill' 1996 /////////////1111'. , 1997 1997 1998 1998 1999 1999 • 2000 2000 A :2! I2001 2001 T O -' 2002 1 Z - 2002 2003 r v 2003 C 2004 . 2004 C • Z 2005 `+—I K 2005 70 2006 2006 2006 N • - _"I N 1 O N 2007 2007 1 •i. 2008 2008 Iii 2009 2009 Z 2010 20101 2011 -- 2011• CJ W - . 2012 2012• 2013 2013 • 2014_ 2014• i 2015 i 2015 • 201611111 • 2016 2017 2017• 2018 2018 HARVEY PLACE RESERVOIR SOUTH TAHOE PUBLIC UTILITY DISTRICT HARVEY PLACE RESERVOIR DATA SUMMARY From: January 1,2018 - To: December 31,2018 Temp NH3+ NH3-N Org-N TKN NO3-N NO2-N Total N PO4-P Total P Alk MBAS D.O. D.O. Date pH C NH4 mg/I mg/I mg/I mg/I mg/I mg/L mg/I mg/I mg/I mg/I mg/I Saturation 01/03/18 7.52 5.4 23.2 0.099 0.8 24.0 1.41 0.521 25.9 2.49 2.66 162 7.99 77.0 01/09/18 7.81 5.5 02/01/18 7.29 7.3 24.9 0.073 0.0 24 1.26 0.448 25.7 2.74 2.55 168 8.37 84.3 03/06/18 8.44 2.8 25.6 0.716 6 32 0.993 0.371 33.4 2.62 2.6 166 13.4 120.2 04/03/18 7.45 9.2 22.5 0.110 1.5 24.0 0.84 0.258 25.1 2.43 2.37 151 9.45 99.9 05/10/18 7.03 14.7 18.6 0.053 1.2 19.8 0.813 0.272 20.9 2.30 2.35 148 9.59 115.4 05/29/18 8.31 18.1 11.3 148.0 06/07/18 8.12 17.6 17.6 0.740 2.3 19.9 0.811 0.394 21.1 2.46 2.36 139 6.43 83.1 07/10/18 7.64 22.8 15.5 0.322 2.6 18.1 0.113 0.158 18.4 2.67 2.92 144 5.43 66.4 07/19/18 8.07 22.0 10.1 08/07/18 7.97 21.6 14.8 0.592 1.1 15.9 0.663 17.0 3.10 3.16 142 8.45 117.0 08/27/18 8.66 20.4 11.8 09/05/18 8.33 17.6 17.1 1.136 1.4 18.5 19.1 3.35 153 6.87 87.7 09/18/18 7.46 16.6 2.36 29.4 10/18/18 7.92 10.9 30.9 0.505 0.1 31.0 0.479 0.449 31.9 3.34 4.21 200 6.32 69.4 11/06/18 7.42 10.0 _ 28.6 0.139 4.4 33.0 0.748 0.609 34.4 3.40 3.38 196 9.70 104.9 12/04/18 7.97 4.0 28.4 0.302 1.0 29.4 0.972 0.69 31.1 3.05 3.01 187 9.44 87.6 Maximum 8.66 22.8 30.9 1.136 6.4 33.0 1.41 0.69 34.40 3.40 4.21 200 13.40 148.0 Minimum 7.03 2.8 14.8 0.053 0.0 15.9 0.11 0.16 17.00 2.30 2.35 139 2.36 29.4 Average 7.85 13.3 22.3 0.399 1.9 24.1 0.83 0.42 25.33 2.78 2.91 163 8.56 92.2 #Samples 17 17 12 12 12 12 11 10 12 11 12 12 0 16 14 SOUTH TAHOE PUBLIC UTILITY DISTRICT HARVEY PLACE RESERVOIR DATA SUMMARY From: January 1,2018 To: December 31,2018 Water COD BOD CI TDS S.S. Turb EC Ca Na Mg SAR Level Flow % Ice Date mg/I mg/I mg/I mg/I mg/I NTU uS/cm mg/I mg/I mg/I ft. acre-ft Cover 01/03/18 Not Valid 50.6 252 2.22 1.7 570 19.0 47.5 4.38 2.55 36.0 0 01/09/18 4.59 615 47.0 0 02/01/18 5.00 52.8 258 1.54 1.7 577 19.3 47.5 4.42 2.54 40.5 0 03/06/18 5.84 52.2 246, 4.52 2.2 607 17.2 43.3 4.04 2.44 44.0 5 04/03/18 4.82 48.1 226 2.58 1.8 540 18.4 46.1 4.32 2.51 49.0 0 05/10/18 10.2 51.6 230 -2.53 1.7 . 516 18.0 45.0 4.29 2.47 52.0 0 05/29/18 491 53.0 0 06/07/18 11.8 51.0 234 5.75 3.8 498 19.1 47.8 4.46 2.56 53.5 0 07/10/18 Not Valid 54.1 251 9.22 3.5 492 19.5 49.5 4.68 2.61 47.0 0 07/19/18 10.3 502 44.5 0 08/07/18 8.43 59.7 256 5.27 2.7 523 19.5 51.2 4.61 2.71 39.2 0 08/27/18 549 32.0 0 09/05/18 Not Valid 64.0 270 12.4 5.0 559 20.2 54.6 4.76 2.84 36.5 0 09/18/18 17.9 644 16.0 0 10/18/18 5.01 67.9 288 6.20 6.8 700 21.4 60.2 4.90 3.05 13.0 0 11/06/18 5.51 65.4 281 5.26 4.1 671 22.5 61.8 5.26 3.05 20.2 0 12/04/18 3.58 64.3 270 1.40 2.6 710 20.8 55.1 4.83 2.83 28.0 0 Maximum 17.90 67.9 288 12.40 6.80 710 22.5 61.8 5.26 3.05 53.5 0 5 Minimum 3.58 48.1 226 1.40 1.70 491 17.2 43.3 4.04 2.44 13.0 0 0 Average 7.75 56.8 255 4.91 3.13 574 19.6 50.8 4.58 2.68 38.3 0 #Samples 0 12 12 12 12 , 12 17 12 12 12 12 17 0 17 SOUTH TAHOE PUBLIC UTILITY DISTRICT HARVEY PLACE RESERVOIR DATA SUMMARY From: January 1,2018 To: December 31,2018 Coliforms Fecal Air Algae Weeds Total Fecal/E.coli Strep Temp SO4 Boron Date MPN MPN MPN C mg/L mg/L Comments 01/03/18 No No 8,664 < 1 8.0 17.2 01/09/18 No No 7.5 02/01/18 No No 9,804 3.1 19.5 17.3 03/06/18 No No 613 < 1 2.8 16.7 04/03/18 No No 517 < 1 7.5 15.0 05/10/18 No No 1,725 19.7 26.0 14.4 05/29/18 yes yes 22.5 06/07/18 No No > 24,192 48.7 19.7 14.1 07/10/18 Yes Yes 4,960 12.1 26.5 12.9 -07/19/18 No No . 26.1 08/07/18 No No 5,860 7.4 23.8 11.7 08/27/18 Yes No 21.9 09/05/18 Yes No 137 < 1 24.5 13.0 09/18/18 Yes No 22.1 10/18/18 yes No 435 22.6 13.1 18.6 11/06/18 yes yes 1,410 22.8 14.4 20.6 12/04/18 No No 79 < 1 2.6 22.3 Maximum > 24,192 48.7 26.5 22.3 Minimum 79 < 1.0 2.6 11.7 Average 4,866 11.8 17.0 16.2 #Samples 17 17 12 12 17 12 0 SOUTH TAHOE PUBLIC UTILITY DISTRICT HARVEY PLACE RESERVOIR DATA SUMMARY From: 1989 To: 2018 Temp NH3+ NH3-N Org-N TKN NO3-N NO2-N Total N PO4-P Total P Alk MBAS D.O. D.O. Year pH C NH4 mg/I mg/I mg/I mg/I mg/I mg/L mg/I mg/I mg/I mg/I mg/I %SAT 89 8.10 13.6 8.59 0.264 1.63 10.22 4.94 0.14 15.29 1.94 2.21 70 0.040 8.64 101.02 90 8.40 14.5 6.71 1.012 4.58 11.30 5.86 0.22 17.37 2.73 3.20 72 0.080 8.51 102.85 91 7.72 13.9 2.78 0.103 1.63 4.41 9.93 0.27 14.61 2.52 2.89 53 0.060 7.23 87.49 92 7.73 14.3 4.69 0.083 1.61 6.30 8.25 0.32 14.87 3.60 3.86 61 0.070 - 7.30 86.26 93 7.76 12.3 7.84 0.119 1.20 9.04 5.03 0.23 14.30 2.90 3.05 70 0.060 7.49 84.49 94 7.80 11.1 15.53 0.223 1.65 16.82 , 2.85 0.32 19.99 3.16 3.18 118 0.080 7.25 80.39 95 7.82 13.0 16.25 0.308 2.86 18.55 0.82 0.13 19.51 2.26 2.49 119 0.060 8.11 93.85 96 7.80 13.8 14.06 0.472 1.88 15.85 1.12 0.27 17.24 2.06 2.13 116 0.060 7.44 89.74 97 7.71 12.2 12.26 0.165 0.88 12.28 1.37 0.23 13.88 1.77 2.03 100 0.030 7.48 83.93 98 7.65 11.7 13.90 15.58 1.73 0.31 17.63 2.27 2.28 110 0.070 7.83 90.18 99 7.51 12.3 14.47 0.121 1.78 15.69 1.39 0.34 17.42 2.05 2.26 106 0.060 6.63 69.93 00 7.95 12.9 15.74 0.696 2.83 18.23 0.93 0.31 19.47 2.26 2.50 110 0.070 8.29 99.53 01 7.94 12.8 15.57 0.608 2.10 17.51 1.26 0.49 19.26 2.33 2.57 107 8.36 103.10 02 7.79 13.2 12.87 0.408 2.33 15.21 2.10 0.52 17.83 2.22 2.51 99 8.64 104.13 03 7.76 12.5 15.98 0.287 2.49 18.29 1.20 0.56 20.05 2.26 2.44 113 7.31 77.82 04 7.85 11.9 17.37 _ 0.477 19.57 1.10 0.31 20.84 2.55 2.75 116 7.52 75.17 05 7.96 11.6 15.21 0.617 1.28 16.23 1.16 0.36 17.76 2.66 2.70 130 8.63 97:22 06 7.68 11.9 14.57 0.391 1.68 16.23 0.93 0.21 17.37 2.22 2.36 127 8.37 92.53 07 8.41 '12.5 16.72 1.456 2.35 19.26 0.56 0.29 20.11 2.85 3.06 151 9.65 104.52 08 8.21 11.2 15.05 0.974 1.55 16.60 1.69 0.62 18.91 2.86 3.08 133 7.82 82.84 09 8.07 11.1 16.56 0.526 1.70 18.10 1.97 0.51 20.58 2.87 3.07 139 6.82 76.61 10 7.93 10.7 15.92 0.430 0.38 15.07 1.75 0.54 17.35 2.58 2.79 140 6.66 71.41 11 7.90 11.3 12.64 0.430 2.49 14.97 1.96 0.72 17.65 2.00 2.26 117 7.38 82.91 12 7:60 12.0 15.36 0.291 17.90 18.20 2.90 0.61 21.70 2.53 2.59 133 6.54 72.70 13 8.17 11.4 12.02 0.943 5.51 17.53 3.87 0.60 22.01 2.13 2.44 113 8.97 94.88 14 8.23 11.3 14.45 1.106 2.50 16.95 2.80 0.49 20.24 2.56 2.98 130 7.37 77.79 15 7.86 12.0 15.23 0.388 2.63 17.86 4.84 0.45 23.13 2.64 2.87 124 8.55 95.65 16 7.59 12.8 15.87 0.243 2.37 18.23 3.21 0.77 22.18 2.61 2.91 130 - 8.46 95.98 17 7.77 11.3 12.62 0.222 4.85 17.30 1.68 0.85 19.83 1.79 2.41 107 8.38 91.41 18 7.85 13.3 22.31 0.399 1.90 24.13 0.83 0.42 25.33 2.78 2.91 163 8.56 92.16 Maximum 8.41 14.5 22.31 1.456 17.90 24.13 9.93 0.85 25.33 3.60 3.86 163 0.080 9.65 104.52 Minimum 7.51 10.7 2.78 0.083 0.38 4.41 0.56 0.13 13.88 1.77 2.03 53 0.030 6.54 69.93 Average 7.88 12.4 13.64 0.475 2.80 15.72 2.67 0.41 18.79 2.47 2.69 113 0.062 7.87 88.62 #Years 30 30 30 29 28 30 30 30 30 30 30 30 12 30 30 SOUTH TAHOE PUBLIC UTILITY DISTRICT HARVEY PLACE RESERVOIR DATA SUMMARY From: 1989 To: 2018 Water COD BOD CI- TDS SS Turb EC Ca Na Mg SAR Level Flow % Ice Year .mg/I mg/I mg/I mg/I mg/I NTU uS/cm mg/I mg/I mg/I ft. acre-ft Cover 89 25.3 2.95 89.2 357 21.37 18.87 635 19.6 92.9 3.26 4.88 38.05 491 5 90 32.4 4.92 93.5 355 9.33 5.82 616 16.6 86.2 3.41 5.04 40.94 303 4 91 23.9 3.82 91.7 369 20.36 5.99 595 16.4 84.3 3.55 4.91 38.50 4 92 28.0 4.25 72.0 312 7.83 3.88 496 16.2 72.7 3.28 4.31 39.08 6 93 29.1 5.92. 53.2 241 29.42 5.63 413 14.9 45.5 3.26 2.71 42.48 17 94 27.8 6.01 70.2 268 7.56 3.82 548 18.5 53.3 3.86 2.94 38.43 10 95 25.1 4.70 50.8 226 7.09 3.87 482 16.3 41.3 3.53 2.41 42.54 1 96 23,7 4.53 47.3 225 4.81 3.53 462 16.4 46.4 3.58 2.70 43.75 0 97 18.6 2.93 44.5 205 7.07 5.98 415 14.8 38.0 - 3.38 2.28 45.44 0 98 20.6 3.53 49.6 226 5.20 3.67 461 15.0 43.4 3.31 2.64 41.92 12 99 27.7 4.19 48.8 221 11.53 5.25 450 14.4 42.1 3.42 2.59 40.74 2 00 31.9 6.21 53.6 227 16.80 3.67 466 15.7 44.6 3.53 2.68 40.98 0 01- 43.8 5.79 61.3 243 26.09 7.40 490 16.2 45.8 3.68 2.67 40.93 3 02 29.7 5.23 57.5 237 9.32 4.04 466 15.4 44.8 3.51 2.68 37.39 0 03 31.3 4.75 56.8 235 8.38 4.14 484 15.3 45.2 3.53 2.71 40.90 0 04 31.3 4.53 57.9 236 5.81 4.08 504 16.0 43.5 3.69 2.54 38.15 3 05 35.9 6.81 52.7 242 11.57 4.48 447 16.4 46.4 3.50 2.70 38.66 16 06 39.9 7.35 44.3 222 17.56 12.67 397 14.5 42.4 3.29 2.60 38.80 12 07 45.3 9.14 53.3 257 13.78 7.40 515 17.1 54.1 3.80 3.08 36.81 1 08 47.0 9.62 52.6 248 14.55 8.09 495 16.2 52.1 3.73 3.03 37.73 8 09 40.2 7.48 50.9 251 8.97 5.17 530 16.7 52.8 3.92 2.95 37.74 0 10 40.8 8.42 48.5 247 8.41 5.14 514 16.8 24.0 4.07 1.37 39.29 12 11 39.8 8.14 42.6 218 24.21 12.21 435 16.2 22.4 3.71 2.50 41.22 8 12 8.13 50.2 245 21.83 6.58 501 17.3 49.9 3.78 2.83 34.83 0 13 9.01 48.7 246 17.10 8.06 457 17.3 49.5 3.81 2.80 37.24 13 14 8.53 51.6 259 12.69 6.71 516 18.0 52.3 4.06 2.89 39.46 5 15 11.52 52.2 269 62.20 10.78 534 18.0 53.4 4.20 2.95 32.40 5 16 7.57 56.5 257 17.91 4.86 536 18.2 53.5 4.11 2.94 37.33 10 17 14.61 42.2 207 45.88 36.23 466 15.8 39.0 3.80 2.28 39.85 6 18 7.75 56.8 255 4.91 3.13 574 19.6 50.8 4.58 2.68 38.32 -0 Maximum 47.0 14.61 93.5 369 62.20 36.23 635 19.6 92.9 4.58 5.04 45.44 491 17 Minimum 18.6 2.93 42.2 205 4.81 3.13 397 14.4 22.4 3.26 1.37 32.40 303 0 Average 32.1 6.61 56.7 254 15.98 7.37 497 16.5 50.4 3.67 2.94 39.33 397 5 #Years 23 30 30 30 30 30 30 30 30 30 30 30 2 30 SOUTH TAHOE PUBLIC UTILITY DISTRICT HARVEY PLACE RESERVOIR DATA SUMMARY From: 1989 To: 2018 Coliforms Fecal Air Algae Weeds Total Fecal/E coil Strep Temp SO4 Boron Year MPN MPN MPN C mg/L mg/L Comments 89 125 7 60 17.2 90 275 3 17 18.2 42.8 0.32 91 64 4 30 17.1 41.2 0.37 92 991 94 203 16.6 35.1 0.33 93 633 9 280 15.1 23.2 0.22 94 505 6 422 ` 11.4 26.8 0.26 95 107 14 112 12.9 24.2- 0.17 96 374 11 97 16.0 19.9 0.19 97 2 < 2 < 2 5.9 13.1 0.08 98 192 4 56 7.5 19.3 0.14 99 460 4 97 13.0 19.1 0.20 00 363 6 73 15.5 19.1 0.22 01 533 187 78 13.2 19.5 0.24 02 - 128 25 178 20.3 18.2 0.22 03 309 26 33 13.0 19.3 0.19 04 204 20 28 12.4 17.9 0.25 05 1,516 46 194 13.5 16.8 0.24 06 341 53 168 14.5 14.3 0.16 07 111 57 34 12.5 15.4 0.22 08 197 35 164 14.0 16.4 0.24 09 393 16 6 12.1 17.6 0.17 10 539 83 5 _ 10.4 16.2 0.18 11 477 8 29 9.9 13.0 0.15 12 745 168 30 11.7 17.1 0.16 13 556 18 20 13.6 16.7 0.16 14 403 47 52 10.4 16.4 0.19 15 24,369 77 12.6 20.1 0.22 16 17,784 92 13.2 17.8 17 25,843 37 12.8 12.5 18 _4,866 12 17.0 16.2 Maximum 25,843 187 422 20.3 42.8 0.37 Minimum 2 < 2 < 2 5.9 12.5 0.08 - Average 2780 39 95 13.4 20.2 0.23 #Years 30 30 26 30 29 26 NO3-N & NH3-N Total Phosphorus 25 6 20 5 1 5 f s. A r A 4 = V Vi" \ ; - a� 3_ A AN\A"....7*_\Ai E E 10 2 5 IF wipiippry 1 _ 0 0 , , , . , , , , , , , . , , , , , , , , , , , 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 -A--NO3-N NH3-N -A-Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 140 - 500 120 _ 450 400 - 100 - -_ 350 — 300 - 80 J - -- -a250 �m - �� E 60 w w 200 40 - 150 - 100 20 50 0 - 0 , 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 -A--Chlorides Linear(Chlorides) - -A--TDS Linear(TDS) Harvey Place Reservoir Recycled Water Current Storage Not including 200+/-acre-foot dead pool Maximum Storage, Acre-feet: 3,800 Stored Remaining Date Acre-feet Acre-feet 01/01/16 743 3,057 02/01/16 1,185 2,615 03/01%16 1,493 2,307 04/01/16 1,875 1,925 05/01/16 2,104 1,696 06/01/16 2,322 1,478 07/01/16 2,139 1,661 08/01/16 1,304 2,496 09/01/16 595 3,205 10/01/16 72 3,728 11/01/16 243 3,557 12/01/16 479 3,321 01/01/17 940 2,860 02/01/17 1,843 1,957 03/01/17 3,082 718 04/01/17 3,460 340 05/01/17 3,005 795 06/01/17 ` 2,617 1,183 07/01/17 2,210 1,590 08/01/17 1,626 2,174 09/01/17 878 2,922 10/01/17 114 3,686 1,1/01/17 220 3,580 12/01/17 544 3,256 01/01/18 878 2,922 02/01/18 1,177 2,623 03/01/18 1,410 2,390 .04/01/18 1,938 1,862 05/01/18 2,246 1,554 06/01/18 2,465 1,335 07/01/18 1,927 1,873 08/01/18 1,240 2,560 ) 09/01/18 531 3,269 10/01/18 88 3,712 11/01/18 206 3,594 12/01/18 453 3,347 E:\HPR\HPR Current Storage-Lahontan_Report . • Acre-feet • N co co 01 O 01 O 01 O 031 O O O O CD CD CD O O O O O O O O O O O 01/16 02/16 03/16 04/16 05/16 06/16 07/16 08/16 09/16 CD su 10/16 41. 11/16 0 C 12/16 CD 01/17 O. 02/17 03/17 eh eh 04/17 CD xi 05/17 - 06/17 (/) 07/17 CD 0 M 0 08/17 09/17 (Q 10/17 11/17 12/17 01/18 02/18 03/18 04/18 05/18 06/18 07/18 _ a 08/18 09/18 10/18 11/18 12/18 INDIAN CREEK RESERVOIR INDIAN CREEK RESERVOIR MONITORING Indian Creek Reservoir(ICR) is a 3,160 acre-foot capacity fresh water reservoir, located in the northeast portion of Alpine County, California (Figure 1). The ICR was constructed in 1967 for the temporary storage of treated wastewater. Since 1989, all make-up water for the ICR has been provided by fresh water diversions from Indian Creek and the West Fork of the Carson River. In 2002, the Lahontan Regional Water Quality Control Board (LRWQCB) adopted draft amendments to the water quality control plan for the Lahontan Region. These amendments included Interim Target and Final Target Total Maximum Daily Load (TMDL) numerical limits for five (5) indicator parameters at the ICR: Total Phosphorus (TP); Dissolved Oxygen (DO); Secchi Depth; Chlorophyll a; and Carlson Trophic State Index(TSI). In 2005, Alex Horne Associates consultant completed a pre-design for an in-reservoir oxygenation system (a hypolimnetic oxygenation system or HOS) for the ICR. Operation of the oxygenation system is designed to improve water quality by reducing phosphorus and chlorophyll a levels; improve fisheries habitat by increasing DO content within the hypolimnion; and lower the TSI of the ICR. ICR TMDL Objectives Target Value Target value Indicator Long Term Interim Total Phosphorus, mg/L 0.02 0.04 Dissolved Oxygen: Not Depressed, percent or < 10 Saturation, percent or >_ 80 Concentration, mg/L >_ 7.0 30-day mean, mg/L 6.5 7-day minimum, mg/L 5.0 1-day minimum, mg/L 4.0 Secchi Depth, meters >_ 2 >_ 2 feet >_ 6.6 >_ 6.6 Chlorphyll a, mg/m3 < 10 _< 10 Carlson Trophic Status Index < 45 _< 45 The HOS is comprised of a Speece Cone, which was installed at ICR in Nov/December 2008. The equipment building, electrical and controls instrumentation installation was completed near the start of the 2nd quarter of 2009. Regular operation of the HOS started in June 2009. 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'''"stir ti ., f I'i �fis It . /t:? '� ,.wsy r .. `�.�tS ca•'x` .. , ,! .C' fl` s ,:fin; a LRtt,��Ae � i ,,,„4,4•.,.,.. t t� py~.,I i ter • ®�_ - � �, t • ''''''''''.14, �t�11' f`" i'')k ',:i,,,,‘,qt: EXPLANATION ,/ ':-E, ��`. •', CR T IDL station ,, ''',,,r,,,:-.-ii,-1,,, `.4.,..;)',� yr ; . ..„. 1 ', r ^�`, ': s ,firf I ❑ ICR TMDL Station(proposed) !� Lake(Maximtxn Elevation) ,i.' '>E '4.1k10.:77,,i..,,1 ixr ♦ S � - „,,,:;, . ,,,..„ — - streams Road Classification e'.-71. r I ' Er ,, `� ,1.4.,• Wastewater Line Road ',firtiii.' .' is C.':91:" tlJ "t `r v r k:.t .'r i t y �''.. '�1c }•r f 3 . r R45 Jt';V, 'tar '1 r: C* � T ; +5 1968 to resent Unimproved Road :'' ti •� l ,tS�S '$ t ,r l t41,s4;;i1.$14*,.;' f �y ;5 �d► Ij ''')i'' Harvey Pasture Cline t,..' .t r '� j.:14; •7,Y,Pr' ,e.!: '..,,s.;:,,..,;,.;,,,„:„....,, s' 't y" J r•"fir 19681 198H f t, t.1 '4n S .-JF **12'. .:L�le a�y *iy� :4.�1- O L.A'_ ,11',..c.' �J�.7�rN... ' •Jt ��1'�.f ? IY 1� yk��Yl J.. ...a,. , 1000 0 100 6Vl/V Feed INDIAN CREEK RESERVOIR `, South Tahoe Public Utility Districtw --""7-r TMDL MonitoringStations s Figure 3. SOUTH TAHOE PUBLIC UTILITY DISTRICT ' INDIAN CREEK RESERVOIR DATA SUMMARY 2018 Secchi NH3+ Depth Total P D.O. D.O. Chlorophyll Depth NH4 NH3-N Org-N TKN NO3-N NO2-N Total N PO4-P Date Site Ft mg/I mg/I %SAT mg/m' ft. mg/L mg/I mg/I mg/I mg/I mg/I mg/L mg/I 02/26/18 ICR-01 Frozen 03/28/18 ICR-01 0.5 0.030 11.37 90.6 5 4.73 <0.020 <0.020 0.412 0.412 <0.010 <0.010 0.412 0.015 ' 03/28/18 ICR-01 21.1 0.045 11.30 89.3 6 <0.020 <0.020 0.436 0.436 <0.010 <0.010 0.436 <0.010 03/28/18 ICR-01 42.1 0.039 11.22 88.5 7 <0.020 <0.020 0.568 0.568 <0.010 <0.010 0.568 <0.010 03/28/18 ICR-03 0.5 0.033 11.41 92.3 5 5.50 <0.020 <0.020 0.408 0.408 <0.010 <0.010 0.408 <0.010 03/28/18 ICR-03 19.5 0.039 11.25 88.6 5 <0.020 <0.020 0.451 0.451 <0.010 <0.010 0.451 <0.010 03/28/18 ICR-05 0.5 0.032 11.32 90.3 2 5.94 <0.020 <0.020 0.398 0.398 <0.010 <0.010 0.398 <0.010 04/17/18 ICR-01 0.5 0.035 10.04 87.4 7 5.21 <0.020 <0.020 0.479 0.479 <0.010 <0.010 0.479 <0.010 04/17/18 ICR-01 21.0 0.047 10.21 88.2 9 <0.020 <0.020 0.513 0.513 <0.010 <0.010 0.513 <0.010 04/17/18 ICR-01 42.1 0.038 9.72 83.3 12 <0.020 <0.020 0.728 0.728 <0.010 <0.010 0.728 0.014 04/17/18 ICR-03 0.5 0.033 10.04 88.5 4 5.60 <0.020 <0.020 0.471 0.471 <0.010 <0.010 0.471 <0.010 04/17/18 ICR-03 24.0 0.050 9.88 85.2 9 <0.020 <0.020 0.503 0.503 <0.010 <0.010 0.503 <0.010 04/17/18 ICR-05 0.5 0.033 9.99 87.7 9 5.37 <0.020 <0.020 0.463 0.463 <0.010 <0.010 0.463 <0.010 05/22/18 ICR-01 0.5 0.026 10.32 105.3 6 8.10 <0.020 <0.020 0.375 0.518 0.027 <0.010 0.545 0.021 05/22/18 ICR-01 21.0 0.032 9.64 96.0 6 <0.020 <0.020 0.550 0.550 0.030 0.028 0.608 0.021 05/22/18 ICR-01 41.9 0.033 6.27 61.6 7 l 0.025 <0.020 0.557 0.582 0.040 0.028 0.650 0.024 05/22/18 ICR-03 0.5 0.024 10.28 105.2 6 7.79 <0.020 <0.020 0.545 0.545 0.026 <0.010 0.571 0.022 05/22/18 ICR-03 29.9 0.033 7.21' 71.3 3 0.029 <0.020 0.499 0.528 0.033 0.028 0.589 0.023 05/22/18 ICR-05 0.5 0.024 10.30 105.6 5 7.86 <0.020 <0.020 0.581 0.581 0.027 <0.010 0.608 0.021 06/25/18 'ICR-01 0.5 0.026 8.66 97.1 6 6.15 <0.020 <0.020 0.557 0.557 <0.010 <0.010 0.557 0.010 06/25/18 ICR-01 14.3 0.032 8.37 90.8 9 <0.020 <0.020 0.569 0.569 <0.010 <0.010 0.569 <0.010 06/25/18 ICR-01 37.5 0.029 4.64 49.3 <1 <0.020 <0.020 0.642 0.642 <0.010 <0.010 0.642 <0.010 06/25/18 ICR-03 0.5 ,0.024 8.82 99.2 6 5.85 <0.020 <0.020 0.576 0.576 <0.010 <0.010 0.576 <0.010 06/25/18 ICR-03 27.1 '0.054 6.03 64.4 15 <0.020 <0.020 0.688 0.688 <0.010 <0.010 0.688 <0.010 06/25/18 ICR-05 0.5 0.029 , 8.82 99.3 6 5.75 <0.020 <0.020 0.584 0.584 <0.010 <0.010 0.584 <0.010 07/26/18 ICR-01 0.5 0.024 7.10 82.2 30 5.12 0.063 <0.020 0.736 0.799 <0.010 <0.010 0.799 <0.010 07/26/18 ICR-01 21.0 0.042 3.86 43.3 18 0.149 <0.020 0.700 0.849 <0.010 <0.010 0.849 0.010 07/26/18 ICR-01 39.0 0.050 2.38 26.6 22 0.203 <0.020 . 0.797 1.000 <0.010 <0.010 1.000 <0.010 07/26/18 ICR-03 0.5 0.026 7.27 84.4 26 4.93 0.054 <0.020 0.773 0.827 <0.010 <0.010 0.827 <0.010 07/26/18 ICR-03 24.0 0.040 3.64 40.8 10 0.167 <0.020 0.687 0.854 <0.010 <0.010 0.854 <0.010 07/26/18 ICR-05 0.5 0.028 8.01 92.7 ' 15 5.28 0.050 <0.020 0.685 0.735 <0.010 <0.010 0.735 <0.010 08/21/18 ICR-01 0.5 0.043 8.35 93.2 17 2.40 <0.020 <0.020 0.840 0.840 <0.010 <0.010 0.840 0.012 08/21/18 ICR-01 21.0 0.050 7.86 87.5 29 <0.020 <0.020 0.887 0.887 <0.010 <0.010 0.887 <0.010 08/21/18 ICR-01 36.1 0.062 4.44 49.0 26 0.029 <0.020 0.971 1.000 <0.010 <0.010 1.000 <0.010 08/21/18 ICR-03 0.5 0.042 8.23 91.5 16 2.40 <0.020 <0.020 0.803 0.803 <0.010 <0.010 0.803 <0.010 08/21/18 ICR-03 27.0 0.071 3.94 43.4 29 0.023 <0.020 0.952 0.975 <0.010 <0.010 0.975 <0.010 08/21/18 ICR-05 0.5 0.048 8.08 89.5 14 2.40 <0.020 <0.020 0.842 0.842 <0.010 <0.010 0.842 <0.010 09/19/18 ICR-01 0.5 0.048 9.25 92.4 35 2.18 <0.020 <0.020 0.760 0.760 <0.005 <0.005 0.760 0.018 09/19/18 ICR-01 24.0 0.056 7.94 77.7 41 <0.020 <0.020 0.894 0.894 <0.005 <0.005 0.894 <0.010 09/19/18 ICR-01 39.0 0.057 8.33 81.2 34 <0.020 <0.020 0.856 0.856 <0.005 <0.005 0.856 <0.010 09/19/18 ICR-03 0.5 0.041 9.47 94.6 35 2.26 <0.020 <0.020 0.759 0.759 <0.005 <0.005 0.759 <0.010 09/19/18 ICR-03 24.0 0.044 8.54 82.9 34 <0.020 <0.020 0.796 0.796 <0.005 <0.005 0.796 <0.010 09/19/18 ICR-05 0.5 0.047 9.06 89.7 34 2.24 0.046 <0.020 0.741 0.787 <0.005 <0.005 0.787 <0.010 10/18/18 ICR-01 0.5 0.062 8.73 79.8 11 2.74 <0.020 <0.020 0.664 0.664 <0.010 <0.010 0.664 0.024 10/18/18 ICR-01 21.0 0.068 8.62 77.6 <1 <0.020 <0.020 0.850 0.850 0.012 <0.010 0.862 0.019 10/18/18 ICR-01 39.0 0.099 8.20 73.7 32 <0.020 <0.020 0.866 0.866 0.011 <0.010 0.877 0.018 10/18/18 ICR-03 0.5 0.096 8.63 78.0 20 2.55 <0.020 <0.020 0.719 0.719 0.011 <0.010 0.730 <0.010 10/18/18 ICR-03 24.0 0.093 8.21 73.3 20 <0.020 <0.020 0.728 0.728 0.012 <0.010 0.740 0.017 10/18/18 ICR-05 0.5 0.089 8.95 80.5 21 2.43 <0.020 <0.020 0.743 0.743 0.012 0.012 0.767 0.012 11/15/18 ICR-01 0.5 0.060 10.17 82.4 15 2.34 <0.020 <0.020 0.791 0.791 <0.010 <0.010 0.791 <0.010 11/15/18 ICR-01 21.0 0.045 9.86 79.3 23 <0.020 '<0.020 0.937 0.937 <0.010 <0.010 0.937 <0.010 11/15/18 ICR-01 39.0 0.051 9..-79 78.8 18 <0.020 <0.020 0.798 0.798 <0.010 <0.010 0.798 <0.019 11/15/18 ICR-03 0.5 0.048 10.08 82.0 23 2.52 <0.020 <0.020 0.915 0.915 <0.010 <0.010 0.915 <0.010 11/15/18 ICR-03 24.0 0.051 9.68 77.8 17 <0.020 <0.020 0.798 0.798 0.010 <0.010 0.808 <0.010 11/15/18 ICR-05 0.5 0.048 10.05 81.9 26 2.17 <0.020 <0.020 0.819 0.819 <0.010 <0.010 0.819 0.010 12/12/18 ICR-01 Frozen Maximum 42.1'. 0.099 11.41 105.6 41 8.10 0.203 <0.020 0.971 1.000 0.040 <0.028 1.000 0.024 • Minimum 0.5 0.024 2.38 26.6 <1 2.17 <0.020 <0.020 0.375 0.398 <0.005 <0.005 0.398 <0.010 Average 14.4 0.045 8.59 81.3 15.7 4.36 0.031 <0.020 0.679 0.697 0.012 <0.010 0.703 0.012 #Measurements 54 54 54 54 54 27 54 54 54 54 54 54 54 54 SOUTH TAHOE PUBLIC UTILITY DISTRICT ' INDIAN CREEK RESERVOIR DATA SUMMARY 2018 Lake Depth Temp Alk MBAS COD BOD CI TDS S.S. Turb EC Ca Na Mg SAR Level %Ice Date Site Ft C pH mg/I mg/I mg/I mg/I mg/I mg/I mg/I NTU uS/cm mg/I mg/I mg/I ft. Cover Algae Weeds 02/26/18 ICR-01 Frozen 100 03/28/18 ICR-01 0.5 5.7 7.73 37.6 1.12 59 2.44 5.60 79 0 No No 03/28/18 ICR-01 21.1 5.3 7.73 37.2. 1.09 53 2.44 5.70 79 03/28/18 ICR-01 42.1 5.3 7.62 37.0 1.10 62 2.70 6.10 79 03/28/18 ICR-03 0.5 6.2 7.75 37.4 1.10 59 3.20 5.50 78 03/28/18 ICR-03 19.5 5.2 7.65 37.4 1.08 51 2.26 6.30 79 03/28/18 ICR-05 0.5 5.7 7.73 37.4 1.09 60 2.55 5.60 79 04/17/18 ICR-01 0.5 9.3 7.33 1.10 5.40 78 0 No , No 04/17/18 ICR-01 21.0 9.0 7.38 1.09 7.20 79 04/17/18 ICR-01 42.1 8.6 7.13 1.08 20.00 79 04/17/18 ICR-03 0.5 9.8 7.73 1.08 5.10 79 04/17/18 ICR-03 24.0 8.8 7.60 1.08 6.70 79 04/17/18 ICR-05 0.5 9.6 7.69 1.08 5.60 79 05/22/18 ICR-01 0.5 16.3 7.81 38.8 1.29 64 2.72 2.40 81 0 Yes No 05/22/18 ICR-01 21.0 15.2 7.60 39.2 1.29 61 3.41 2.80 81 05/22/18 ICR-01 41.9 14.6 7.18 40.3 1.30 68 7.46 5.70 84 05/22/18 ICR-03 0.5 16.5 7.86 39.2 1.30 63 2.81 2.50 81 05/22/18 ICR-03 29.9 14.9 7.22 39.4 1.31 61 4.53 3.20 83 05/22/18 ICR-05 0.5 16.5 7.86 39.2 1.30 61 2.59 3.00 81 06/25/18 ICR-01 0.5 21.0 8.70 1.12 2.20 86 0 Yes No 06/25/18 ICR-01 14.3 19.3 7.95 1.12 3.70 85 06/25/18 ICR-01 37.5 18.3 6.94 1.11 6.40 88 06/25/18 ICR-03 0.5 21.1 8.89 1.08 2.20 86 06/25/18 ICR-03 27.1 18.6 7.42 1.12 3.00 85 06/25/18 1CR-05 0.5 21.2 8.89 1.08 4.00 86 07/26/18 ICR-01 0.5 22.7 8.26 1.06 5.50 89 0 yes yes 07/26/18 ICR-01 21.0 21.0 7.78 1.08 4.70 89 07/26/18 ICR-01 39.0 20.8 7.36 1.07 5.40 91 07/26/18 ICR-03 0.5 22.8 8.66 1.08 6.90 89 07/26/18 ICR-03 24.0 21.0 7.50 1.08 7.20 89 07/26/18 ICR-05 0.5 22.6 8.22 1.07 4.90 89 08/21/18 ICR-01 0.5 20.8 7.96 41.0 1.15 65 11.80 11.00 88 0 Yes Yes 08/21/18 ICR-01 21.0 20.6 8.92 41.4 1.12 57 12.20 12.00 88 ' 08/21/18 ICR-01 36.1 20.1 8.29 41.0 1.12 46 22.40 18.00 87 08/21/18 ICR-03 0.5 20.5 8.59 41.2 1.11 61 13.00 12.00 88 08/21/18 ICR-03 27.0 20.0 8.40 41.6 1.11 59 22.20 18.00 87 08/21/18 ICR-05 0.5 20.4 8.91 41.0 1.11 56 11.70 11.00 88 09/19/18 ICR-01 0.5 15.4 8.64 <1.00 12.00 89 0 Yes Yes 09/19/18 ICR-01 24.0 14.4 8.45 <1.00 15.00 89 09/19/18 ICR-01 39.0 14.2 8.40 <1.00 16.00 89 09/19/18 ICR-03 0.5 15.4 8.75 <1.00 10.00 89 09/19/18 ICR-03 24.0 14.1 8.31 <1.00 12.00 89 09/19/18 ICR-05 0.5 14.9 8.24 <1.00 11.00 89 10/18/18 ICR-01 0.5 11.3 7.02 44.4 1.44 70 8.04 6.60 89 0 Yes Yes 10/18/18 ICR-01 21.0 10.6 7.23 44.4 1.42 65 11.90 8.70 89 10/18/18 ICR-01 39.0 10.6 7.05 44.4 1.42 65 34.20 20.00 89 10/18/18 ICR-03 0.5 10.9 7.22 44.0 1.41 63 11.20 7.80, 92 10/18/18 ICR-03 24.0 10.3 6.94 44.2 1.42 65 15.40 10.00 93 10/18/18 ICR-05 0.5 10.6 6.95 44.0 1.40 69 12.40 8.80 89 11/15/18 ICR-01 0.5 6.4 6.57 1.64 9.10 94 0 No No 11/15/18 ICR-01 21.0 6.0 7.13 1.61 9.70 94 11/15/18 ICR-01 39.0 6.0 7.13 1.63 9.20 94 11/15/18 ICR-03 0.5 6.5 7.59 1.62 9.70 94 11/15/18 ICR-03 24.0 6.0 7.48 1.61 16.00 94 11/15/18 ICR-05 0.5 6.6 7.59 1.59 12.00 90 12/12/18 ICR-01 Frozen • Maximum 42.1 22.8 8.92 44.4 1.64 70 34.20 20.00 94 100 Minimum 0.5 5.2 6.57 37.0 <1.00 46 2.26 2.20 78 0 Average 14.4 13.8 7.80 40.5 1.20 61 9.40 8.26 86 10 #Measurements 54 54 54 24 0 0 0 54 24 24 54 54 0 0 0 0 0 10 9 9 • SOUTH TAHOE PUBLIC UTILITY DISTRICT ' INDIAN CREEK RESERVOIR DATA SUMMARY 2018 Coliforms Fecal Air Depth Total FecaUE.cot Strep Temp SO4 Boron Fe Mn Date Site Ft MPN MPN MPN C mg/L mg/L ug/L ug/L Comments 02/26/18 ICR-01 Frozen 03/28/18 ICR-01 0.5 11 <1 11.8 2.63 03/28/18 ICR-01 21.1 2.40 03/28/18 ICR-01 42.1 1.85 • 03/28/18 ICR-03 0.5 11 <1 2.46 03/28/18 ICR-03 19.5 2.29 03/28/18 ICR-05 0.5 11 <1 2.85 04/17/18 ICR-01 0.5 6 <1 7.0 1.51 04/17/18 ICR-01 21.0 2.62 - 04/17/18 ICR-01 42.1 2.51 04/17/18 ICR-03 0.5 3 <1 2.79 04/17/18 ICR-03 24.0 2.83 04/17/18 ICR-05 0.5 7 1 2.93 • 05/22/18 ICR-01 0.5 34 <1 16.0 2.09 05/22/18 ICR-01 21.0 2.16 05/22/18 ICR-01 41.9 2.41 ' 05/22/18 ICR-03 0.5 13 <1 1.76 , 05/22/18 ICR-03 29.9 2.32 05/22/18 ICR-05 0.5 4 <1 2.50 06/25/18 ICR-01 0.5 25 2 29.1 2.40 06/25/18 ICR-01 14.3 2.00 06/25/18 ICR-01 37.5 2.08 06/25/18 ICR-03 0.5 22 <1 2.71 06/25/18 ICR-03 27.1 3.00 06/25/18 ICR-05 0.5 43 <1 2.60 07/26/18 ICR-01 0.5 10 <1 32.4 2.24 07/26/18 ICR-01 21.0 1.69 t, 07/26/18 ICR-01 39.0 2.43 07/26/18 ICR-03 0.5 30 <1 2.40 07/26/18 ICR-03 24.0 2.56 07/26/18 ICR-05 0.5 39 <1 2.62 08/21/18 ICR-01 0.5 166 <1 . 26.5 1.62 08/21/18 ICR-01 21.0 , 2.57 08/21/18 ICR-01 36.1 2.46 08/21/18 ICR-03 0.5 172 2 2.72 08/21/18 ICR-03 27.0 2.56 08/21/18 ICR-05 0.5 411 <1 2.12 , 09/19/18 ICR-01 0.5 517 3 34.8 1.10 09/19/18 ICR-01 24.0 1.10 09/19/18 ICR-01 39.0 1.10 09/19/18 ICR-03 0.5 649 1 1.10 09/19/18 ICR-03 24.0 1.10 , 09/19/18 ICR-05 0.5 816 <1 1.10 10/18/18 ICR-01 0.5 30 2 19.9 1.91 10/18/18 ICR-01 21.0 1.92 , 10/18/18 ICR-01 39.0 1.91 10/18/18 ICR-03 0.5 54 4 1.92 10/18/18 ICR-03 24.0 1.92 10/18/18 ICR-05 0.5 56 16 1.91 11/15/18 ICR-01 0.5 2 <1 13.9 2.13 11/15/18 ICR-01 21.0 2.13 11/15/18 ICR-01 39.0 2.13 11/15/18 ICR-03 0.5 6 <1 2.13 11/15/18 ICR-03 24.0 2.14 11/15/18 ICR-05 0.5 11 <1 2.14 12/12/18 ICR-01 Frozen Maximum 42.1 816 16 34.8 3.00 Minimum 0.5 2 <1 7.0 1.10 Average 14.4 117 2 21.3 2.16 #Measurements 54 27 27 0 9 54 0 0 0 t I SOUTH TAHOE PUBLIC UTILITY DISTRICT INDIAN CREEK RESERVOIR DATA SUMMARY From: 1980 To: 2018 Secchi NH3+ . Total P D.O. D.O. Chlorophyll Depth NH4 NH3-N Org-N TKN NO3-N NO2-N Total N PO4-P Year mg/I mg/I %SAT mg/m3 ft. mg/L mg/I mg/I mg/I mg/I mg/I mg/L mg/I 80 0.305 8.75 88.8 1.227 0.080 1.351 2.578 3.465 0.201 6.244 0.212 81 0.267 10.26 122.8 0.404 0.148 1.335 1.692 7.454 0.315 9.405 0.176 82 0.531 9.77 113.5 0.925 0.105 1.521 2.417 4.329 0.190 6.916 0.421 - 83 0.575 10.22 116.6 0.474 0.139 1.223 1.697 3.419 0.125 5.241 0.472 84 0.459 10.35 115.8 0.476 0.120 1.350 1.799 3.356 0.154 5.309 0.339 85 0.219 9.93 112.6 0.629 0.142 1.585 2.212 2.722 0.118 5.052 0.092 86 0.164 9.54 111.0 1.277 0.273 1.577 2.854 3.080 0.147 6.082 0.059 87 0.145 9.00 101.7 2.927 0.331 1.755 4.683 3.590 0.174 8.447 0.058 88 0.095 9.13 105.3 4.661 0.097 2.194 6.855 6.406 0.161 13.421 0.023 89 0.075 9.26 107.5 2.970 0.160 1.053 4.023 4.892 0.108 9.023 0:020 90 0.154 9.02 104.9 0.140 0.052 1.178 1.318 0.705 0.028 2.051 0.078 91 0.299 8.91 102.9 0.206 0.074 1.889 2.095 0.289 0.015 2.374 40.143 92 0.318 8.90 105.4 0.082 0.040 2.828 2.910 0.038 0.011 2.959 0.136 93 0.778 8.72 102.6 0.171 0.029 8.453 8.624 0.150 0.013 8.054 0.115 94 0.179 8.15 91.0 0.138 0.038 1.573 1.711 0.039 0.014 1.764 0.080 95 0.344 8.57 102.1 0.203 0.050 5.542 5.744 0.068 0.012 5.823 0.061 96 0.600 9.00 106.3 0.100 0.030 6.110 6.220 0.040 0.010 6.260 0.020 97 0.062 9.05 102.4 0.185 0.015 0.883 1.068 0.083 0.029 1.181 0.018 98 0.049 8.61 102.1 0.088 0.013 0.655 0.743 0.089 0.010 0.840 0.011 99 0.076 8.50 94.8 3.98 0.072 0.010 0.913 0.985 0.023 < 0.010 1.018 0.012 00 0.078 6.70 71.8 24.0 2.67 0.154 0.011 0.927 1.080 0.070 < 0.010 1.161 0.013 01 0.053 6.12 72.6 11.4 5.62 0.054 0.011 0.860 0.913 0.010 < 0.010 0.933 0.015 02 0.048 6.76 74.2 13.3 7.47 0.078 0.016 0.825 0.903 0.038 < 0.010 0.951 0.015 03 0.044 7.87 86.6 14.2 8.21 0.119 0.024 0.759 0.881 0.033 < 0.010 0.922 0.013 04 0.042 6.43 74.5 15.6 10.25 0.105 0.013 0.845 0.941 0.030 < 0.010 0.982 0.015 05 0.043 7.25 80.4 9.7 6.50 0.094 0.011 0.870 0.964 0.043 < 0.010 0.988 0.013 06 0.069 6.54 69.4 13.9 5.15 0.160 < 0.010 0.621 0.781 0.045 < 0.010 0.836 0.015 07 0.057 6.66 76.1 14.8 4.72 0.106 0.013 0.899 1.005 0.031 < 0.010 1.047 0.013 08 0.071 6.66 80.2 21.0 3.77 0.076 0.011 1.149 1.225 0.048 < 0.010 1.282 0.018 09 0.067 8.28 98.9 16.2 4.48. 0.046 0.013 1.249 1.295 0.021 < 0.010 1.326 0.013 10 0.042 7.80 91.8 11.1 7.69 0.029 0.011 0.801 0.829 0.019 < 0.010 0.858 0.011 11 0.041 6.97 80.6 9.2 8.19 0.055 0.010 0.512 0.568 0.013 < 0.010 0.591 0.012 12 0.037 7.87 90.5 4.8 10.95 0.086 0.015 0.667 0.754 0.034 < 0.010 0.798 0.012 13 0.035 8.45 98.4 7.4 10.64 0.049 0.020 0.727 0.776 0.027 < 0.011 0.797 0.012 14 0.037 9.07 91.2 9.9 7.25 0.041 0.021 0.751 0.782 0.012 < 0.010 0.786 0.012 15 0.045 9.74 93.8 19.9 7.85 0.031 0.022 0.992 1.023 0.013 < 0.010 1.028 0.010 16 0.034 9.37 88.1 10.3 9.87 0.039 < 0.020 0.660 0.691 0.027 < 0.010 0.714 0.011 17 0.047 8.25 75.1 16.1 5.54 0.071 < 0.020 0.517 0.581 0.020 < 0.010 0.593 0.012 18 0.045 8.59 81.3 15.7 4.36 0.031 < 0.020 0.679 0.697 0.012 < 0.010 0.703 0.012 Maximum 0.778 10.35 122.8 24.0 10.95 4.661 0.331 8.453 8.624 7.454 0.315 13.421 0.472 Minimum 0.034 6.12 69.4 4.8 2.67 0.029 < 0.010 0.512 0.568 0.010 < 0.010 0.591 0.010 Average 0.170 8.44 94.5 13.6 6.76 0.482 0.057 1.546 2.023 1.148 0.052 3.199 0.072 #Years 39 39 39 19 20 39 39 39 39 39 39 39 39 Note:Chromogenic Substrate test for Total Coliform and E.coli begun in November 2014 SOUTH TAHOE PUBLIC UTILITY DISTRICT INDIAN CREEK RESERVOIR DATA SUMMARY From: 1980 To: 2018 Lake Temp Alk MBAS COD BOD CI" TDS S.S. Turb EC Ca Na Mg SAR Level %Ice Algae Weeds Year C pH mg/I mg/I mg/I mg/I mg/I mg/I mg/I NTU uS/cm mg/I mg/I mg/I ft. Cover 80 12.9 8.47 75 0.05 24.8 2.80 132.2 459 8.16 2.20 605 64.53 72.33 2.37 2.38 49.81 4 81 14.4 9.3 78 0.04 24.1 2.23 103.1 457 5.74 2.22 653 72.00 48.50 1.94 1.53 49.20 0 82 12.6 8.74 91 0.04 25.7 2.73 82.4 363 8.84 3.74 579 59.34 42.95 2.46 1.47 52.36 7 83 12.3 9.15 101 0.03 22.8 2.28 81.2 344 4.69 3.56 553 55.39 '43.94 2.57 1.56 51.86 1 84 12.4 9.12 115 0.03 24.1 3.03 92.2 381 8.35 3.67 627 61.83 61.36 2.52 2.07 51.42 2 85 13.5 9.04 75 0.05 31.1 4.63 107 405 15.64 6.62 682 43.43 83.58 2.73 3.44 49.38 8 86 14.2 8.88 55 0.05 28.9 3.71 72.9 315 19.44 10.73 517 23.43 73.96 2.75 3.83 48.87 0 87 12.9 8.4 74 0.03 28.8 4.69 114 450 14.34 4.44 766 29.75 110.92 3.14 5.21 46.10 8 88 13.6 7.74 60 0.03 14.7 5.12 138 509 19.00 "3.01 891 24.50 134.17 3.26 6.74 45.99 4 89 12.9 8.84 47 0.02 21.8 2.05 113 457 7.10 3.68 786 24.26 111.58 2.88 5.69 41.43 13 90 13.8 9.55 67 0.02 27.8 2.42 82.5 426 8.33 4.38 687 35.08 92.33 3.03 4.02 27.00 14 91 13.1 9.23 69 0.02 42.2_ 8.27 27.6 205 20.36 17.38 297 22.45 32.00 2.61 1.68 17 92 13.8 9.55 74 0.03 46.3 3.50 18.6 166 13.75 5.48 257 21.58 24.50 2.43 1.34 15 93 _ 13.1 8.73 55 0.03 129.3 21.00 5.93 109 81.91 24.43 135 12.98 9.69 2.17 0.66 13 94 11.4 9.42 67 0.02 38.7 5.12 8.10 130 7.16 5.35 168 18.29 13.07 2.46 0.76 15 95 13.2 8.66 54 0.02 31.4 6.59 3.86 98 28.68 8.02 124 12.83 8.28 2.27 0.55 44.48 8 96 13.3 9.12 47 0.02 99.4 17.48 1.70 70 71.90 19.45 108 11.29 6.46 2.23 0.46 50.05 0 97 12.5 8.77 40 0.02 19.1 2.97 1.47 64 12.86 6.08 91 9.70 5.51 1.91 0.42 47.44 2 98 12.3 8.32 43 0.02 16.1 2.43 1.50 66 8.47 4.34 99 9.97 5.88 1.77 0.45 45.65 11 99 13.1 8.17 43 0.02 20.3 2.83 1.33 82 14.63 11.13 97 10.29 5.92 1.97 0.44 45.50 00 10.3 8.24 48 19.3 2.09 1.32 96 11.58 15.15 105 10.70 5.92 1.96 0.44 01 13.2 8.25 50 24.2 1.68 1.41 79 9.16 12.47 109 02 11.0 8.46 48 21 1.50 1.42 77 4.19 5.79 105 03 10.0 8.29 48 19.7 1.74 1.82 71 3.06 4.33 106 04 14.0 8.45 48 17.9 1.78 2.05 68 4.50 3.81 104 10.10 7.46 1.91 0.56 05 11.5 8.15 48 18.2 1.73 1.89 72 3.71 3.78 102 0 06 10.0 7.65 42 24.3 1.80 1.38 72 5.64 9.35 91 _ 2 07 12.6 8.41 51 29.2 2.97 1.66 85 6.00 8.34 113 11.03 6.89 2.20 0.50 9 08 13.4 8.53 54 26.4 2.09 103 6.48 17.21 118 2 09 13.9 8.85 52 32.5 2.09 89 6.65 10.38 119 0 10 13.4 8.38 48 26.9 1.83 75 4.59 5.97 105 0 11 13.7 7.60 40 21.2 1.02 70 3.19 2.95 81 0 12 13.2 8.37 49 0.92 73 1.92 2.47 --96 - 0 13 12.8 8.43 50 1.12 71 2.22 1.73 99 12 14 12.2 8.61 49 1.17 66 3.35 2.81 102 0 15 14.3 9.13 52 1.35 75 3.04 3.73 111 9 16 13.2 8.26 48 1.62 73 2.31 2.26 99 7 17 12.2 7.58 37 1.16 66 5.18 6.87 78 9 18 13.8 7.80 41 1.2 61 9.40 8.26 86 10 Maximum 14.4 9.55 115 0.05 129.3 21.00 137.9 509 81.91 24.43 891 72.00 134.17 3.26 6.74 52.36 17 Minimum 10.0 7.58 37 0.02 14.7 1.50 0.9 61 1.92 1.73 78 9.70 5.51 1.77 0.42 27.00 0 Average 12.8 8.58 57 0.03 31.2 4.33 31.2 179 12.19 7.12 273 28.47 43.79 2.41 2.01 46.66 6 #Years 39 39 39 20 32 28 39 39 39 39 39 23 23 23 23 16 33 0 0 Note:Chro, SOUTH TAHOE PUBLIC UTILITY DISTRICT INDIAN CREEK RESERVOIR DATA SUMMARY From 1980 , To: 2018 Coliforms Fecal Air Total Fecal/E.coli Strep Temp SO4 Boron Fe Mn Year MPN MPN MPN C mg/L mg/L ug/L ug/L Comments 80 12.4 81 18.1 - 82 15.4 83 97 10 40 14.5 84 238 4 186 16.0 85 231 4 203 17.1 86 173 5 419 18.7 87 72 6 38 17.2 88 330 5 166 17.2 89 219 6 208 15.7 90 166 5 64 18.0 91 77 2 28 17.8 34.33 0.13 92 265 4 91 17.2 ' 18.08 0.11 93 519 7 259 14.9 8.32 0.06 94 477 13 54 11.5 7.48 0.06 95 584 4 26 12.4 5.39 0.03 96 186 2 189 16.7 2.59 0.04 97 75 7 119 15.1 3.43 0.02 98 154 3 149 8.2 2.75 0.02 99 50 6 30 15.5 4.74 0.02 00 7 < 2 3 19.2 5.50 0.03 1,180 46 01 200 < 2 2 16.5 4.75 0.02 547 67 02 29 < 3 27 24.3 4.90 0.02 318 31 03 9 < 4 3 13.6 3.21 0.02 218 82 04 7 2 4 18.0 2.54 0.03 222 28 05 16 2 24 16.2 1.99 0.02 307 36 06 49 3 5 13.9 1.58 0.02 773 82 07 6 2 2 20.1 3.42 0.02 614 35 08 15 2 3 17.5 4.68 0.02 1,237 50 09 230 2 2 14.8 4.66 0.02 794 24 10 403 4 2 13.6 3.72 0.01 264 21 11 376 5 5 13.1 1.30 0.01 387 32 12 24 2 3 16.2 1.21 0.01 169 22 13 32 2 7 15.4 1.83 "178 20 14 146 4 2 15.2 2.50 15 354 3 17.8 2.70 16 341 1 16.5 3.08 17 84 2 14.2 1.50 478 23 18 117 2 21:3 2.16 Maximum 584 13 419 24.3 34.33 0.13 1,237 82 Minimum 6 1 2 8.2 1.21 0.01 169 20 Average 177 4 74 16.1 5.16 0.03 512 40 #Years 36 36 32 39 28 22 15 15 Note:Chrol INDIAN CREEK RESEREVOIR Total Phosphorus Chlorophyll a 0.20 - 50 - 40 0.15 M 30 -J • 0.10 _ 20 0.05 - 10 J - A. 0.00 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 —f—Series1 —A=Chlorophyll a Linear(Chlorophyll a) Secchi Depth NO3-N&NH3-N 0 10 5 __ 9 10 CD 7 uni 15 6 co• 20 - —i E - ao 5 0 25 • E 4 • 30 = 3 ILL 35 2 40 1 45 0 -- 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 8081 82 83 84 85 86 87 88 89 9091 92 93 94 95 96 97 9899 00 0102 03 04 05 06 07 08 091011 12 1314 15 1617 18 —A—Secchi Depth Linear(Secchi Depth) --A--NO3-N —9—NH3-N INDIAN CREEK RESEREVOIR Chlorides Total Dissolved Solids 150 _ 700 7,- 140 140 650 130 _ 600 = 120 _ 550 110 - 500 - 100 450 90 = 400 vi 800 v) 350 60 _ E 300 50 250 • 40 200 = 30 150 20 100 10 50 0 808182838485868788899091929394959697989900010203040506070809101112131415161718 0 8081828384T85868788899091929394959697989900010203040506070809101112131415161718' —A—Chlorides Linear(Chlorides) —f—TDS Linear(TDS) pH 12 �- 11 10 • 9 8 7 6 5 4 - , „ , , , , . , , , , , , , , 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 091011 12 131415161718 —t—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 2018 and the yearly averages since monitoring was initiated. Trends are plotted for parameters indicative of wastewater. Groundwater, surfacewater and soil quality data for 2018 are summarized below. Fourteen new monitoring wells were drilled in Alpine County in 2011. These 14 new wells were first monitored monthly in 2012. Wells ACMW-20 thru ACMW-26 are required to be monitored in our reclamation permit. Several of these wells replaced domestic wells (GW-XX) and monitoring wells. In 2015 the regional Board reduced sampling frequency for all monitoring wells from `monthly to quarterly. The Regional Board also replaced Total Coliform monitoring by the multiple tube fermentation method with E. coli monitoring using the Idexx Colilert QuantiTray method (chromogenic substrate). The water quality results obtained from monitoring wells ACMW-13 thru ACMW-19 will provide data needed to evaluate potential changes in water quality from the use of new irrigation fields designed for the application and temporary storage of reclaimed wastewater in Diamond Valley. The 2005 Arsenic results for the GW sites (domestic wells or potable water wells) should be viewed with caution; these results may be invalid. Domestic wells that previously showed no Arsenic had detectable Arsenic during 2005. The domestic wells that had previously showed detectable Arsenic all had significant increases in the concentration of Arsenic. This did not happen in the monitoring wells. All monitoring wells had either no detectable Arsenic or had the same concentration of Arsenic as in previous years. Surfacewaters Nitrate-N for surface waters was performed using the Brucine method prior to March 1983. Beginning in March 1983, the cadmium reduction method was used for all Nitrate analyses on surfacewaters. For this reason, Nitrate-N data prior to 1983 should be used with caution. During 1997, a new sample type of bottle was used for dissolved nutrients, including Nitrate. These bottles were rinsed with HNO3. Due to the material of the sample bottles,the normal rinsing of the bottles was insufficient to remove all traces of Nitrate from the bottle. The spike in Nitrate results during 1997 can be attributed to this insufficient rinse. Beginning in 1998 the dissolved nutrient sample bottles were rinsed with HCI. Beginning in June 2000, Chloride, Nitrite-N, Nitrate-N, ortho-Phosphate-P and Sulfate were analyzed using ion chromatography. Starting in 2000, most surface water sites were sampled March-November, only.This may bias the annual averages to a higher value due to a higher percentage of months with irrigation occurring. Starting in 2001, monitoring was performed in irrigation ditches crossing the California / Nevada border. This was initiated following a request by the Nevada Department of Environmental Protection. Starting in 2002, a lower dilution was incorporated into the Total and Fecal Coliform test. This lowered the detection limit to 3 MPN/100mL. In 2015 The Regional Board replaced Total Coliform monitoring by the multiple tube fermentation method with E. coli monitoring using the Idexx Colilert Quanti-Tray method (chromogenic substrate). Soils In 2015 the Regional Board removed S8 from the list of soil sites to monitor. Sample Sites ;Site Latitude Longitude Location Type Sample Alpine County Monitoring Wells ACMW-01AW 38.766952 -119.781561 Below Main Dam Monitoring Well ACMW-01 BE 38.766333 -119.785321 Below Secondary Dam Monitoring Well ACMW-02N 38.772392 -119.776819 Access gate Monitoring Well ACMW-02S 38.772341 -119.776816 Access gate Monitoring Well ACMW-03W 38.815138 -119.778848 Fredericksburg D @Hwy 88 Monitoring Well ACMW-04W 38.836719 -119.779439 Gansberg Ranch Monitoring Well ACMW-06N 38.800522 -119.763225 Celio Ranch,along DV Rd Monitoring Well ACMW-06S 38.800481 -119.763195 Celio Ranch,along DV Rd Monitoring Well ACMW-07S 38.771882 -119.801658 Diamond Valley Ranch Monitoring Well ACMW-07D 38.771882 -119.801658 Diamond Valley Ranch Monitoring Well ACMW-08N 38.773618 -119.776847 Diamond Valley Ranch Monitoring Well ACMW-08S 38.773618 -119.776847 Diamond Valley Ranch Monitoring Well ACMW-09D 38.780489 -119.790314 Diamond Valley Ranch Monitoring,Well ACMW-09S 38.780489 -119.790314 Diamond Valley Ranch Monitoring Well ACMW-10 38.773336 -119.794246 Diamond Valley Weather Station Monitoring Well ACMW-11 38.775595 -119.788216 Diamond Valley Ranch Monitoring Well ACMW-12 38.777644 -119.795388 Diamond Valley Ranch Monitoring Well ACMW-13 38.768977 119.797083 Diamond Valley Ranch Monitoring Well ACMW-14 38.767441 119.793215 Diamond Valley Ranch Monitoring Well ACMW-15 38.769600 119.784280 Diamond Valley Ranch Monitoring Well ACMW-16 38.773829 119.784173 Diamond Valley Ranch Monitoring Well ACMW-17 38.776273 119.790107 Diamond Valley Ranch Monitoring Well ACMW-18 38.779213 119.782997 Diamond Valley Ranch Monitoring Well ACMW-19 38.776249 119.762112 Diamond Valley Ranch Monitoring Well ACMW-20 38.808781 119.777665 Near SW-05 Monitoring Well ACMW-21 38.819915 119.777072 Emigrant Trail near Chambers Lane Monitoring Well ACMW-22 38.829022 119.783738 Fredericksburg Lane near S7 Monitoring Well ACMW-23 38.825384 119.760193 On road to SW-15,upstream(S) Monitoring Well ACMW-24 38.832193 119.757427 On road,downstream (N) of SW-15 Monitoring Well ACMW-25 38.830470 119.769901 Road between Brooke's&Neddenriep @ Neddenripp's Monitoring Well ACMW-26 38.840602 119.769677 Road between Brooke's&Neddenriep @ Stateline Monitoring Well Alpine County Domestic Well GW-02 38.772195 -119.801259 DV Ranch Domestic well Domestic Well GW-05 38.830897 -119.773807 Neddenriep Ranch house Domestic Well GW-08 38.815528 -119.781095 Arant Ranch house Domestic Well GW-11 38.766522 -119.808540 Diamond Valley School Domestic Well GW-17 Diamond Valley Ranch domestic well Domestic Well D:WlpineCo\Sample Sites\Alpine County Sampling Sites Yearly Report Page 1 of 2 • Sample Sites 'Site Latitude Longitude Location Type Sample Alpine County Surfacewater Sites SW-01 38.768903 -119.838353 Carson River,W Fork,Crystal Springs Rd Surfacewater SW-02 38.756651 -119.806706 Indian Creek @ Diversion Surfacewater SW-03 38.773149 -119.772618 Indian Creek downstream of 1st bridge Surfacewater SW-04 38.776730 -119.760423 Indian Creek upstream of 2nd bridge Surfacewater SW-05 38.809525 -119.777030 Carson River,W Fork,Paynesville Surfacewater SW-06 38.840850 -119.764100 Carson River,W Fork,Stateline Surfacewater SW-07 38.854967 -119.786541 Fredericksburg Ditch Surfacewater SW-08 38.786579 -119.799800 Irrigation Ditch along Carson River Road Surfacewater SW-09 38.867242 -119.760810 Carson River,W Fork,Dressler Lane Surfacewater SW-10 38.788719 -119.750599 Indian Creek @ Springmeyer Ranch Surfacewater Alpine County Soils Sites S-2 38.800316 -119.764305 Celio Ranch Soil S-3 38.801475 -119.780012 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 Ditch Sites DD-01 38.765624 -119.780543 Diamond Ditch @ beginning.:HPR Effluent Ditch SW-12 38.809127 -119.777411 Bruns Diversion Ditch SW-13 38.810082 -119.776900 Fredericksburg Ditch Ditch SW-14 38.866992 -119.794173 Fredericksburg Ditch Ditch SW-15 38.828440 -119.756263 Celio Tail water Ditch SW-16 38.866896 -119.783627 Drain Ditch @ Fairview Ln Ditch Reservoir Sites HPR 38.764500 -119.780450 Harvey Place Reservoir Reservoir ICR-1 38.751380 -119.778760 Indian Creek Reservoir-Surface Reservoir ICR-3 38.747720 -119.778490 Indian Creek Reservoir-Surface Reservoir ICR-5 38.744050 -119.779560 Indian Creek Reservoir-Surface Reservoir ICR-6 38.750730 -119.778420 Indian Creek Reservoir-Bottom Reservoir ICR-7 38.749680 -119.778490 Indian Creek Reservoir-Bottom Reservoir ICR-8 38.748680 -119.778580 Indian Creek Reservoir-Bottom Reservoir ICR-9 38.746610 -119.778680 Indian Creek Reservoir-Bottom Reservoir ICR-10 38.745600 -119.778730 Indian Creek Reservoir-Bottom Reservoir ICR-11 38.744600 -119.778850 Indian Creek Reservoir_ Bottom Reservoir ICR-12 38.742870 -119.778940 Indian Creek Reservoir-Bottom Reservoir D:WlpineCo\Sample Sites\Alpine County Sampling Sites Yearly Report Page 2 of 2 f`1 lam. • kri- • • • • • l• • t J• ACMW- ACMW-18 09S • ACMW-12 ! - ,1,464 ek• • ACMW-17 ACM0-11 • • •• .• • t •(13,•"• ACMW-16 • ACMW-08S •ACMW' • AGMY.V-08N.. i ACMW-02N... .s.��. -r - ACMW-O7S 4 • ACMW-02S ACMW-07D ACIAW-15 ACMW-13' • .• • y ACM -14 ACMW-01AW+• r • N A T �. > N ► y P f _ •. EXPLANATION t- MONITOR WELL • PRIVATE WELL Irrigation-Recyled-23 Water Irrigation-Blended Recycled Water 1.500 3.000 6.000 Few SOUTH TAHOE PUBLIC UTILITY DISTRICT " RECYCLED WATER MONITORING PROGRAM W �j E WELL LOCATIONS /1\ CARSON VALLEY GROUNDWATER BASIN (6-6) ALPINE COUNTY, CA /tn. Path X\GISUB_Alpne Counry12011 ALPMWS 24 K 36 mstl ALPINE COUNTY SOILS Site S2a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Celio Type: KT 2018 Inches: 06-12 EC TKN NO3 P P2O5 K K2O Cu Mo SO4 CEC Ca Na Mg Exch CI Exch P Date pH mmho Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg.Kg me/long mg/L mg/L mg/L SAR Na% mg/L mg/L 02/14/18 7.93 10.90 61.8 3,420 1.4 1,136 2,603 1,131 1,362 11 0.07 225 32.1 529 1030 517 7.63 8.91 2,830 4.8 05/31/18 8.13 2.85 63.1 2,470 7.8 371 850 1,516 1,826 8 0.06 95 34.5 77 345 124 5.66 6.48 607 6.0 08/15/18 7.99 3.75 65.9 3,520 7.7 426 976" 5,336 6,428 23 0.04 24 23.8 105 216 51 4.33 4.77 1,150 10.3 11/08/18 8.06 6.80 70.3 4,380 3.0 495 1,134 4,060 4,891 22 0.05 140 32.9 99 85 62 1.65 1.12 2,050 9.0 Maximum 8.13 10.90 70.3 4,380 7.8 1,136 2,603 5,336 6,428 23 0.07 225 34.5 529 1030 517 7.63 8.91 2,830 10.3 Minimum 7.93 2.85 61.8 2,470 1.4 371 850 1,131 1,362 8 0.04 24 23.8 77 85 51 1.65 1.12 607 4.8 Average 8.03 6.08 65.3 3,448 5.0 607 1,391 3,011 3,627 16 0.06 121 30.8 203 419 188 4.82 5.32 1,659 7.5 #Tests 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Site • 2a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Celio Type: KT From: 1981 Inches: 06-12 To: 2018 EC TKN NO3 P P2O5 K K2O Cu Mo SO4 CEC Ca Na Mg Exch CI Exch P Year pH mm ho Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg me/Zoog mg/L mg/L mg/L SAR Na% mg/L mg/L 1981 7.02 1.78 68.3 2,575 3.3 324 742 17,357 20,828 19 0.6 30 36 1982 6.95 1.38 66.9 3,487 3.7 666 1,525. 15,155 18,186 18 0.4 37 28 1983 7.50 1.02 65.7 3,127 1.5 947 2,169 16,286 19,543 23 0.6 36 34 100 224 502 1984 7.97 1.59 62.7 2,585 1.7 664 1,521 14,255 17,106 17 0.3 13 29 92 126 53 2.52 2.4 350 1985 7.94 2.60 56.8 2,559 1.1 801 1,834 16,667 20,000 17 0.3 40 32 150 215 94 3.47 3.7 628 6.0 1986 7.86 3.00 63.7 2,827 1.0 818 1,873 13,183 15,820 17 0.3 104 33 157 276 103 4.10 4.5 658 6.9 1987 7.84 3.62 55.2 2,470 0.7 774 1,772 15,909 19,091 20 0.2 55 32 229 315 120 4.04 4.5 910 5.6 1988 7.76 5.90 63.0 2,938 1.0 815 1,866 13,183 15,820 19 0.2 132 32 323 597 218 6.20 7.3 1,625 7.6 1989 7.81 5.89 56.3 2,551 1.2 722 1,653 14,273 17,127 17 0.1 122 30 367 575 190 6.04 7.1 1,452 5.7 1990 7.87 5.81 58.3 2,491 1.2 696 1,594 13,875 16,650 13 0.1 109 31 328 566 190 6.08 7.1 1,513 5.1 1991 7.82 5.24 59.8 2,592 1.6 826 1,891 13,417 16,100 12 0.2 106 33 286 553 213 5.72 6.8 569 7.2 1992 7.86 5.33 58.5 2,376 1.8 832 1,905 13,583 16,300 10 0.1 120 25 253 652 152 7.91 9.3 1,440 6.3 1993 7.96 5.60 57.3 2,440 1.6 788 1,805 13,250 15,900 7 0.2 175 28 238 691 171 8.42 10.0 922 10.7 1994 7.96 5.12 61.2 2,365 1.7 • 888 2,034 14,500 17,400 8 0.1 130 33 210 628 171 7.45 8.7 1,382 5.5 1995 8.00 3.23 53.3 2,217 3.4 851 1,948 13,771 16,444 14 0.7 48 36 164 356 100 5.41 6.3 740 5.4 1996 8.06 2.60 56.9 2,097 3.0 852 1,951 8 1.0 38 33 121 303 67 5.42 6.3 415 6.5 1997 8.19 1.85 69.2 2,346 2.4 833 1,908 8 1.0 83 34 69 246 43 5.61 6.5 399 4.3 1998 8.15 1.29 66.2 2,316 3.3 760 1,740 16 < 1.1 51 29 57 159 31 4.19 4.6 5.9 1999 8.11 1.38 63.5 2,433 8.0 903 2,067 17 1.5 41 33 60 168 28 4.47 4.9 5.0 2000 8.24 1.98 70.6 2,355 2.5 873 2,000 11,823 14,200 22 < 1.0 58 30 67 249 45 5.57 6.3 6.8 2001 8.24 2.13 64.1 2,200 3.0 758 1,735 11,550 13,875 29 1.8 48 32 69 315 55 6.90 8.0 455 5.8 2002 8.23 1.76 68.7 2,920 6.2 860 1,967 11,300 13,550 20 2.0 60 31 60 241 39 6.13 7.0 299 6.5 2003 8.25 0.93 61.9 1,965 4.1 883 2,020 13,250 15,875 22 1.0 33 31 53 121 26 3.37 3.5 177 7.3 2004 8.27 1.14 64.4 2,500 25.0 925 2,120 12,425 14,900 20 < 1.0 24 32 51 120 34 3.24 3.3 198 8.3 2005 8.03 1.50 60.7 1,745 2.1 948 2,170 13,050 15,675 23 < 1.0 16 32 69 151 45 3.46 _3.6 302 9.1 2006 7.97 2.63 73.7 2,748 2.4 942 2,158 10,655 12,775 25 0.8 111 33 91 240 107 3.96 4.3 212 12.1 2007 8.06 1.41 67.5 3,035 1.8 929 2,128 6,948 8,325 21 0.1 35 67 157 51 3.52 3.7 263 10.7 2008 7.95 1.78 54.0 2,611 2.8 793 1,815 2,003 2,400 15 0.1 32 77 218 51 4.65 5.2 249 `" 17.7 2009 8.16 3.32 68.9 3,185 _ 4.3 778 1,780 2,735 3,250 9 0.1 65 30 80 477 88 8.57 9.9 879 11.0 2010 8.11 1.50 65.5 2,928 2.9 765 1,750 2,341 2,775 16 0.1 47 34 70 173 • 44 3.94 4.2 179 8.1 2011 8.10 1.93 65.2 2,838 3.0 702 1,610 2,800 3,400 17 0.1 102 `34 68 300 57 6.51 7.5 311 10.1 2012 7.75 2.22 62.6 3,133 5.2 716 1,638 2,186 2,600 14 0.1 115 34 92 276 50 5.90 6.8 383 15.1 2013 7.87 3.59 68.1 3,098 5.1 699 1,600 2,830 3,400 14 0.2 115 30 178 377 109 5.48 6.2 1,046 9.8 2014 7.95 5.69 67.3 3,260 4.4 635 1,455 2,593 3,100 15 0.2 146 34 246 627 186 7.38 8.6 786 5.9 2015 7.86 8.41 68.7 5,008 7.3 603 1,383 2,515 3,025 15 0.1 264 34 231 1344 414 12.00 13.7 2,329 8.5 2016 8.00 7.09 76.7 5,433 11.3 504 1,153 3,613 4,325 11 0.2 265 38 244 817 294 10.39 11.9 1,925 17.2 2017 7.92 6.87 69.8 4,068 6.7 455 1,043 1,969 2,375 9 0.1 331 31 283 705 277 7.13 8.3 1,847 10.2 2018 8.03 6.08 65.3 3,448 5.0 607 1,391 3,011 3,627 16 0.1. 121 31 203 419 188 4.82 5.3 1,659 7.5 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 2.4 177 4.3 Average 7.94 3.32 63.8 2,823 3.9 767 1,756 9,949 11,934 16 0.5 94 32 153 388 117 5.71 6.5 818 8.3 #Tests 38 38 38 38 38 38 38 34 34 38 38 36 38 36 36 35 35 35 33 34 Site: S2a Ranch : Celio pH Salinity 11 10 '�------------- -'- '------�---'- �-- ---- � 10 9----- -�-- ' o 'I -----'---- ----'-----�-- - �- ----' - ' 9 _ ----�--'---------' -- 7 _` ------'- ---'-- - --- -- -- - 8 6 / ----- -^-- ' en 7 - '-------------------- --'- -- --------- o � � e _ - 1 o o �--------------'--' ------ o ` _ �___ ___ __ �� __- 1111141,"" o --`------- -------'--'------'' n �__-'_._-__- _--._---_ . _-_----__ __- '�- . -- --| �@��@��@��00�� 2QQ2 E 8 E��-"~~ �~~ ��@��0��0N�0 ��t � Q~-~~~�~~~ ~.~..~ ~. � � ~..�~ ~ psj(%) p‘i pi pi RI RI -�-'pH —Linea (pH) Salinity —Linea (Salinity) Cation Exchange Capacity Sodium Adsorption Ratio I1iJiI1i 20 ___-______—' 40 --- ---------- - ----------------- --^ ---��'-------'' m" oo �--^ ---'- -------- -- �--'-`--�\r-l»t \-.., u« 1n --' � 20 wx '-----�------------- --------- ' --- / �m� | a — -- _�v��"�-----�N��--' -- ----'- 10 '�----- -- -------- ------- vpi � | _ ____ 0��0��00�N��00�� ~—~~~~~^~ ��0�� 2� Q3 2 2 E - _�~~~ cu sr ..�~ .. ~.mpi pi pi�Fs/�,94m | - -�--oso ----Linear(zso) oAn ----Linear(SAn , Site S3a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA . Ranch: Hall Type: SMB 2017 Inches: 06-12 EC TKN NO3 P ' P205 K K20 Cu Mo SO4 CEC Ca Na Mg Exch CI Exch P Date pH mmho Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg.Kg men oog mg/L mg/L mg/L SAR Na% mg/L mg/L 02/28/18 5.54 0.301 39.1 2,790 1.7 6171 1,414? 1,021 i,' ;1;230 1 9 0.09 39.0 22.2 17.3 25.0 5.62 1.34 < 1.00 40 13.6 05/31/18 5.68 0.294 34.5 1,260 1.3 435 . 997? 649 i. " . 7821 8 0.05 36.0 18.7 5.0 68.8 13.50 3.63 3.84 14 6.3 08/15/18 6.09 0.686 37.7 2,000 1.9 607 i , ,1,390,; 3,3291'.. .4,01'0 14 0.05 125.0 21.6 40.5 34.6 13.30 1.21 < 1.00 275 9.7 11/08/18 6.26 0.575 41.2 2,240 1.8 487 • 1,1201 2,200, 2,650 21 0.09 34.0 22.2 34.5 44.8 14.80 1.61 1.06 300 6.4 Maximum 6.26 0.686 41.2 2,790 1.9 617 1,414 3,329 4,010 21 0.09 125.0 22.2 40.5 68.8 14.80 3.63 3.84 300 13.6 Minimum 5.54 0.294 34.5 1,260 1.3 435 997 649 782 8 0.05 34.0 18.7 5.0 25.0 5.62 1.21 < 1.00 14 6.3 Average 5.89 0.464 38.1 2,073 1.7 537 1,230 1,800 2,168 13 0.07 58.5 21.2 24.3 43.3 11.81 1.95 1.73 157 9.0 #Tests 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Site S3a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Hall Type: SMB From: 1981 Inches: 06-12 To: 2017 EC TKN NO3 P P2O5 K K2O Cu Mo SO4 CEC Ca Na Mg Exch CI Exch P Year pH mmho Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg me/100g mg/L mg/L mg/L SAR Na% mg/L mg/L 1981 5.68 1.44 31.4 1,411 0.6 420 962 5,716 6,859 40 0.7 24 23 1982 5.81 0.96 31.3 1,225 3.0 720 1,649 15,887 19,064 37 0.5 33 19 1983 5.93 0.66 44.4 1,928 0.5 790 1,809 14,210 17,052 29 0.5 59 20 61 1984 5.69 0.58 37.9 1,378 0.7 732 1,676 16,818 20,182 20 0.4 32 15 42 34 3 1.21 0.5 54 1985 5.86 0.80 36.2 1,479 0.6 774 1,772 19,036 22,843 18 0.6 26 18 60 54 20 1.59 1.0 103 10.5 1986 5.64 0.73 41.3 1,685 0.7 705 1,614 17,510 21,012 19 0.4 25 19 51 54 17 1.66 1.5 111 12.7 1987 5.30 0.67 35.7 1,435 0.4 768 1,759 18,182 21,818 19 0.5 27 17 52 56 17 1.65 1.5 103 12.2 1988 5.67 1.51 43.2 1,898 0.5 761 1,743 17,600 21,120 21 0.5 49 18 123 139 32 2.96 3.0 265 15.1 1989 5.51 1.73 38.6 1,605 0.5 695 1,591 18,000 21,600 19 0.3 57 17 112 165 40 3.46 3.7 322 9.1 1990 5.84 1.73 35.7 1,613 0.7 720 1,650 16,500 19,800 13 0.3 41 18 99 172 35 4.00 4.4 331 9.0 1991 5.85 2.08 36.5 1,551 0.6 789 1,807 18,167 21,800 13 0.5 46 21 141 182 54 3.39 3.6 428 10.9 1992 6.11 3.47 36.3 1,411 0.9 803 1,838 17,333 20,800 12 0.3 44 20 255 264 100 3.70 4.0 388 16.8 1993 5.90 1.61 37.2 1,712 0.8 716 1,640 16,818 20,182 8 0.3 33 18 105 121 40 2.59 2.6 280 12.6 1994 5.92 1.65 36.1 1,153 1.1 798 1,826 18,167 21,800 9 0.2 33 19 128 168 84 2.72 2.8 521 13.2 1995 6.10 1.20 33.7 1,439 4.5 782 1,790 16,694 19,889 14 0.7 26 21 80 100 31 2.54 2.5 168 7.6 1996 6.37 0.76 35.8 1,427 2.9 826 1,892 9 1.0 17 20 47 74 17 2.40 2.2 124 9.2 1997 5.97 0.56 35.7 1,188 1.4 738 1,688 10 1.0 15 17 33 49 12 1.96 1.8 68 15.4 1998 6.10 0.45 35.9 17292 1.6 1,010 2,310 18 < 1.2 13 17 32 34 11 1.45 1.3 15.3 1999 5.99 0.36 36.4 1,403 2.8 1,078 2,470 24 < 1.0 6 18 23 28- 6 1.45 1.3 17.5 2000 6.33 0.45 36.2 1,278 1.3 1,085 2,485 16,675 20,000 31 1.3 8 18 26 46 9 2.00 1.6 16.5 2001 6.19 0.30 35.2 1,167 1.2 860 1,970 16,600 19,925 33 2.8 4 18 27 33 9 1.43 < 1.0 25 16.3 2002 6.07 0.44 33.8 1,362 3.6 925 -2,115 16,450 19,775 30 2.3 9 18 29 30 10 1.23 < 1.0 52 18.7 2003 6.46 0.26 35.7 1,400 1.2 1,023 2,343 16,667 20,000 59 1.0 6 20 22 23 5 1.14 1.0 16 11.4 2004 6.17 0.37 33.1 1,200 1.7 1,040 2,380 17,275 20,725 31 . 1.3 9 20 24 30 8 1.38 1.0 31 15.1 2005 5.69 0.34 36.5 1,300 1.0 1,095 2,508 15,850 19,025 30 1.3 16 20 26 24 8 1.03 < 1.0 23 21.4 2006 5.75 0.33 33.7 886 2.2 1,008 2,307 12,893 15,467 35 0.7 16 18 27 21 8 0.88 < 1.0 25 13.2 2007 5.58 0.38 41.0 1,898 2.1 930 2,130, 5,854 7,025 25 0.1 22 26 33 8 1.45 < 1.1 35 14.5 2008 5.62 0.29 34.9 1,322 1.5 730 1,673 1,174 1,400 17 0.1 18 22 21 7 1.01 < 1.0 23 12.5 2009 5.90 0.22 33.1 1,016 1.5 766 1,753 1,504 1,800 11 0.1 10 18 14 17 5 0.71 < 1.0 16 6.3 2010 5.67 0.26 40.9 1,701 2.2 704 1,613 1,438 1,700 17 0.1 26 21 16 20 6 1.06 < 1.0 27 8.5 2011 5.57 0.29 38.5 1,730 1.3 741 1,695 1,782 2,150 17 0.1 35 20 20 18 8 0.90 < 1.0 30 40.4 2012 6.10 0.33 34.4 1,557 0.8 654 1,500 1,040 1,267 15 0.2 42 19 43 14 8 0.65 < 1.0 15 10.3 2013 5.74 0.26 34.1 1,132 0.4 607 1,390 1,353 1,625 16 0.1 22 18 22 19 5 0.92 < 1.0 16 5.7 2014 5.97 0.38 32.4 997 0.5 691 1,585 1,508 1,825 16 0.2 21 17 23 36 7 1.73 < 1.4 17 5.6 2015 5.90 0.44 34.5 1,691 0.7 562 1,285 1,698 2,050 15 0.1 19 18 21 36 15 1.48 < 1.1 32 27.6 2016 5.69 0.31 34.1 1,878 3.5 556 1,275 1,812 2,175 15 0.2 10 18 15 33 4 1.96 1.7 28 32.2 2017 5.79 0.35 35.0 1,935 6.0 357 815 1,255 1,525 8 0.1 23 18 24 21 5 1.06 1.0 14 36.8 2018 5.89 0.46 38.1 2,073 1.7 537 1,230 1,800 2,168 13 0.1 58.5 21 24 43 12 1.95 1.7 157 9.0 Maximum 6.46 3.47 44.4 2,073 6.0 1,095 2,508 19,036 22,843 59 2.8 59 23 255 264 100 4.00 4.4 521 40.4 Minimum 5.30 0.22 31.3 886 0.4 357 815 1,040 1,267 8 0.1 4 15 14 14 3 0.65 0.5 14 5.6 Average 5.88 0.77 36.2 1,467 1.6 776 1,777 11,214 13,454 21 0.6 26 19 53 63 19 1.79 1.7 120 15.0 #Tests 38 38 38 38 38 38 38 34 34 38 38 - 36 38 36 35 35 35 35 32 34 Site: S3a Ranch : Hall pH Salinity 11 10 _ . 10 9 8 9 - 7 8 6 N 6 • E 4 5 3 2 `-OW1NO1M�W�Wn�a0� a�E'O'ONmM'0'Ni'0' OO•O'O�N 'N'N x(O 11O W�0 -1O�O�NN!NM�ONQ'lNn�O(N N O NMO OO Oa O Na aM� na(aO O 0aDO)0�N M�O cO tO O O O�NtM V' O" O O]O Q1 01 O O O d)M Of Of M d1 M O 01 M O O O O O.O O O O O O O O O O O O O O O N N N N N N N N N N N N N N N N N N --�—pH Linear(pH) —♦--Salinity Linear(Salinity) Cation Exchange Capacity Sodium Adsorption Ratio 50 20 40 15 cm 30 o - _ = a 10 E 20 - 5 10 �-1N1M�V N1(011�10D M�O��-N M1V�ln(O I�WO� N M C' (OI��cO,q�01�-NMV'ln�(O�I��CD ll')(OaO 6�O1��N,M�V'�lA CO I� O�0�-�N1Mtn(OM O��N CO 00 00 DO OD GD 00 CO 00 O)O W 0 0 0 Dl O O O O O O O O O O O O O 0 0 0)D1 M E M O)M O g W O W O O7 O W 0 0 0 O.O O O O O O O O O O o g 0 0 0 0 O O 0D LC m m mem m 01 0 0)M D)O]Q1 0]m 0 0 0 0 0 0 0 0 0 N N N N N N N N N N N N N N N N N O D)O)M O 01 O)O)O)O)O)O)O O]O)O O O O O O O O O O O O O O O O O O O O O O O N N N N N N N N N N N N N N —+--CEC Linear(CEC) —*—SAR Linear(SAR) i - Site S4a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Gansberg Type: DI 2017 Inches: 06-12 EC TKN NO3 P P205 K K20 Cu Mo SO4 CEC Ca Na Mg Exch CI Exch P Date pH mmho Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg.Kg me/100g mg/L mg/L mg/L SAR Na% mg/L mg/L 02/14/18 6.67 0.779 46.9 3,300 18.7 731 1 ' 1,680. 2,0441, '2,4621 21 0.09 30.0 22.1 51.4. 86.7 12.5 2.81 2.74 52 13.8 05/31/18 6.46 0.409 . 30.8 1,310 4.8 244 ' 559 3,411 . . 4,109 11 - 0.05 34.0 17.0 14.1 75.0 11.5 3.59 3.79 10 7.1 08/15/18 7.64 1.390 38.3 2,490 5.2 919 ..2,100,; 1,807 G ' 2,1771 18 0.06 60.0 17.4 54.1 81.1 14.2 2.54 2.36 425 8.1 11/08/18 6.54 0.478 39.3 2,460 3.1 858 " 1,9701 1,450 ' 1,7471 20 0.08 22.0 17.2 51.7 45.6 7.7 1.56 < 1.00 525 6.8 Maximum 7.64 1.390 46.9 3,300 18.7 919 2,100 3,411 4,109 21 0.09 60.0 22.1 54.1 86.7 14.2 3.59 3.79 525 13.8 Minimum 6.46 0.409 30.8 1,310 3.1 244 559 1,450 1,747 11 0.05 22.0 17.0 14.1 45.6 .7.7 1.56 < 1.00 10 6.8 Average 6.83 0.764 38.8 2,390 7.9 688 1,577 2,178 2,624 17 0.07 36.5 18.4 42.8 72.1 11.5 2.63 2.47 253 8.9 #Tests 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Site S4a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Gansberg Type: DI From: 1981 Inches: 06-12 To: 2017 EC TKN NO3 P P2O5 K K2O Cu Mo SO4 CEC Ca Na Mg Exch CI Exch P Year pH mmho Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg me/100g mg/L mg/L mg/L SAR Na% mg/L mg/L 1981 5.80 0.92 47.0 1,533 1.2 206 472 20,757 24,908 28 1.4 17 14 1982 5.92 0.76 45.3 1,938 5.6 473 1,083 20,766 24,919 25 0.8 24 14 1983 6.37 0.36 44.3 1,907 1.5 440 1,008 19,075 22,890 28 0.5 22 16 39 51 89 1984 6.19 0.39 37.6 1,392 1.3 349 799 23,191 27,829 29 0.4 10 17 34 23 8 1.02 0.4 36 1985 6.18 0.41 37.7 1,710 0.8 455 1,042 23,075 27,690 27 0.3 9 19 33 34 7 1.39 0.8 52 6.4 1986 6.08 0.52 39.4 1,625 -1.0 436 998 20,800 24,960 26 0.3 11 18 55. 52 9 1.98 1.9 125 6.5 1987 6.23 1.00 38.4 1,837 0.6 354 811 24,455 29,346 29 0.3 14 17 91 68 20 1.78 1.5 262 10.6 1988 6.18 1.44 41.9 . 2,051 0.5 399 914 22,500 27,000 30 0.4 20 18 115 104 25 2.35 2.2 317 9.9 1989 6.35 3.26 39.2 1,920 0.7 311 712 23,455 28,145 28 0.2 34 17 219 205 48 3.22 3.3 699 11.1 1990 6.69 1.29 37.5 1,742 1.2 392 899 19,125 22,950 21 0.2 20 17 99 107 23 2.48 2.5 389 14.6 1991 6.57 0.97 38.1 1,860 2.4 381 .872 21,667 26,000 20 0.3 12 20 65 82 15 2.38 2.2 171 11.4 1992 6.55 0.98 37.8 1,765 1.5 419 960 21,917 26,300 20 0.3 12 19 72 78 15 2.10 1.8 183 12.3 1993 6.47 0.68 35.8 1,670 2.9 392 897 23,417 28,100 14 0.2 9 19 48 49 15 1.69 1.4 66 9.9 1994 6.53 0.67 35.8 1,381 2.4 423 969 22,500 27,000 14 0.1 10 18 46 65 10 2.25 2.0 214 9.7 1995 6.44 1.15 33.5 1,330 8.0 445 1,020 22,194 26,667 21 0.5 9 13 74 72 17 1.94 1.8 148 6.4 1996 6.82 1.13 36.6 1,594 7.4 470 1,078 14 1.0 11 18 75 91 17 2.39 2.4 82 14.6 1997 6.51 0.51 37.1 1,434 5.1 398 913 16 1.0 4 17 36 47 8 1.84 1.7 40 11.0 1998 6.58 0.81 35.7 1,235 5.0 620 1,420 28 1.2 6 17 45 72 10 2.61 2.4 12.0 1999 6.73 0.97 38.5 1,650 6.9 570 1,305 37 1.8 7 19 66 82 15 2.47 2.3 13.4 2000 6.94 1.63 39.0 1,725 6.6 568 1,300 22,800 27,350 46 < 1.0 16 19 77 136 21 3.55 3.7 19.0 2001 6.83 1.11 37.3 1,585 5.3 515 1,177 22,700 27,225 53 2.0 8 21 86 102 20 2.69 2.7 152 16.7 2002 6.49 0.46 37.3 1,753 3.8 555 1,272 17,300 20,750 40 1.8 3 19 38 47 9 1.85 1.7 52 19.4 2003 6.82 0.55 36.6 1,515 3.2 538 1,230 22,125 26,575 69 1.5 4 19 34 69 7 2.78 2004 6.33 1.09 33.6 1,428 3.8 595 1,363 23,775 28,525 44 __ 1.0 7 19 24 65 16 2.58 2.4 80 11.8 2005 6.49 0.54 36.8 1,550 3.2 643 1,473 22,050 26,450 42 1.0 7 21 32 54 6 2.30 2.1 61 10.3 2006 6.17 0.43 41.7 1,711 8.8 639 1,463 18,460 22,150 42 1.0 6 19 30 41 6 1.88 1.5 29 13.9 2007 6.23 0.46 42.0 2,195 1.2 482 1,105 9,518 11,400 31 0.1 22 35 56 7 2.29 2.0 50 9.4 2008 6.34 0.51 34.4 1,270 2.1 335 765 5,049 6,050 23 0.1 18 31 65 6 2.75 2.6 60 6.5 2009 6.54 0.65 38.3 2,058 6.2 457 1,048 6,487 7,800 15 0.1 10 20 30 85 8 3.54 3.7 69 13.3 2010 6.54 0.63 38.8 2,000 5.1 366 835 5,847 7,025 25 0.1 19 20 30 57 6 2.44 2.4 54 9.1 2011 6.44 0.55 38.6 1;800 6.8 507 1,160 6,973 8,333 27 0.1 55 20 31 70 7 2.94 2.9 35 5.8 2012 6.85 1.16 38.3 2,023 5.8 415 948 5,630 6,750 23 0.2 41 19 57 141 14 4.47 5.0 195 6.5 2013 6.54 0.68 40.4 1,920 7.4 278 638 6,827 8,175 23 0.2 22 16 43 80 8 2.91 2.9 46 6.4 2014 6.46 0.60 37.8 1,835 7.9 348 798 5,579 6,700 24 0.2 19 17 38 72 8 2.89 2.8 28 8.3 2015 6.14 0.94 40.8 2,793 9.8 352 805 5,266 6,325 25 0.1 23 20 42 80 17 2.60 2.4 84 13.7 2016 6.68 1.36 43.0 3,410 11.1 288 658 6,676 8,000 20 0.1 23 22 68 138 19 3.56 3.7 182 19.0 2017 6.93 0.67 39.6 2,270 11.2 272 620 4,176 5,000 15 0.1 24 20 47 67 10 2.38 2.2 23 11.4 2018 6.83 0.76 38.8 2,390 7.9 688 1,577 2,178 2,624 17 0.1 36.5 18 43 72 11 2.63 2.5 253 8.9 Maximum 6.94 3.26 47.0 3,410 11.2 688 1,577 24,455 29,346 69 2.0 54.667 22 219 205 48 4.47 5.0 699 19.4 Minimum 5.80 0.36 33.5 1,235 0.5 206 472 2,178 2,624 14 0.1 3 13 24 23 6 1.02 0.4 23 5.8 Average 6.47 0.87 38.7 1,811 4.6 441 1,011 16,127 19,350 28 0.6 16 18 56 77 13 2.48 2.3 135 11.2 #Tests 38 38 38 38 38 38 38 34 34 38 38 36 38 36 36 35 35 34 32 33 Site: S4a Ranch : Gansberg pH Salinity 11 10 10 9 = 8 9 7 = • 8 6 I 7 s _ 5 -- IIS—��►-�► 6 - __ E 4 5 2 4 1 i = 3 - 0 = �'N`M1�'tn�(O't`�O�M,O��,N'M'V''�t(O'�1W1M'O��N'M1C'W'(O'�'O'M'O'��N'M'V��1(D�'O N CO 00 DO�D OD OD OD 00 M M M M M M O M O O O O O O O O O O O O r r r r r r•-�'-r a-'N M ct L(')(O 1�OD'M'O�N M ct L()(O 11'[O'M O M,�7 ln'(O h OD M O•-'N'M�Y l()'(O 1�O M M O M O M M M O O O O M W W M O M M O O O O O O O O O O O O O O O O O O O O O O m O O O O m M O M O M M'M M M O O O O O O O O O O O M M M M M M M M M M M M M.M M M M M M O O O O O O O O O O O O O O O O O O O N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N —♦—pH Linear(pH) —♦—Salinity Linear(Salinity) Cation Exchange Capacity Sodium Adsorption Ratio 50 20 i - - 40 - - 15 • I _ t _ _ cm 30 - _ a 10 rif20 - co i _ - 5 10 0 _ ,N M��N�CO�I��aD�M�O� �N'I*7'`7'ln,(D'f�,CO„M O i-N(�'V'In�CO,f�,aD,M' ' ' , , 'ln,(O'I�'00 s-N M C ln(O I�OO M Oe-N MctlA(O f�tO M O r N M�IA(O 1�O M O OD CO CO OD OD CO CD f0(�D M M M M W M M M M M O O O O O O O 0 0 0 OO CO 00 OD 00 00 OD,OD 00 M M M M M M M M M M 0 0 0 0 0 0 0 0 0 0 M M M M M M M M M W M M M M M M M M M O O O O O O O O O O O O O O O O O O O - M M M M M M M M M M M M M M M M M M M O O O O O O O O O O O O O O O O O O O ��-�-�-�-•-��- •-N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N —+--CEC Linear(CEC) —+--SAR Linear(SAR) Site S5a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Gansberg Type: HRB 2017 Inches: 06-12 EC TKN NO3 P P205 K K20 Cu Mo SO4 CEC Ca Na Mg Exch CI Exch P Date pH mmho Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg.Kg me/bog mg/L mg/L mg/L SAR Na% mg/L mg/L 02/14/185.71 0.696 35.6 2,140 14.4 497 I; 1,140 909 i 1,0951 20 0.07 31.0 15.8 57.7 41.9 12.40 1.30 < 1.00 121 7.6 05/31/18 5.89 0.371 35.8 1,600 9.6 369; • 845; 1,407 i, • 1,6951 6 0.06 20.0 16.7 18.1 71.9 11.80 3.23 3.31 9 4.7 08/15/18 5.81 0.465 32.1 1,960 6.3 2421 .. 5.541 6,943 i '.•8,364 20 0.06 40.0 17.2 33.8 23.5 6.16 0.98 < 1.00 250 6.6 11/08/18 6.13 0.574 34.2 1,950 ' 6.1 3721 8521 3,1801' 3,831 19 0.04 29.0 15.7 43.1 47.8 9.02 1.73 1.23 325 6.7 Maximum 6.13 0.696 35.8 2,140 14.4 497 1,140 6,943 8,364 20 0.07 40.0 17.2 57.7 71.9 12.40 3.23 3.31 325 7.6 Minimum 5.71 0.371 32.1 1,600 6.1 242 554 909 1,095 6 0.04 20.0 15.7 18.1 23.5 6.16 0.98 < 1.00 9 4.7 Average 5.89 0.527 34.4 1,913 9.1 370 848 3,110 3,746 16 0.1 30.0 16.4 38.2 46.3 9.85 1.81 1.64 176 6.4 #Tests 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Site S5a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Gansberg Type: HRB From: 1981 Inches: 06-12 To: / 2017 EC TKN NO3 P P2O5 K K2O Cu Mo SO4 CEC Ca Na Mg Exch CI Exch P Year pH mmho Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg me/100g mg/L mg/L mg/L SAR Na% mg/L mg/L 1981 5.80 1.08 31.2 997 1.4 233 534 19,729 23,675 21 10.9 19 12 1982 6.05 0.60 29.5 1,011 2.4 455 1,042 20,944 25,133 21 0.7 17 10 1983 6.14 0.18 29.5 982 0.9 462 1,058 18,362 22,034 22 0.6 9 10 24 33 42 1984 6.12 0.23 29.6 1,019 0.8 462 1,058 21,827 26,192 26 - 0.7 5 11 18 20 3 1.15 0.5 27 1985 6.27 0.35 28.1 1,031 0.9 501 1,147 22,575 27,090 21 0.6 5 11 24 39 4 2.05 1.7 42 5.8 1986 6.12 0.33 29.5 1,048 0.6 440 1,008 21,100 25,320 20 0.5 7 11 27 33 3 1.68 1.6 35 6.2 1987 6.22 0.63 29.6 1,037 0.5 470 1,076 24,727 29,672 21 0.6 9 13 30 58 4 2.56 2.5 74 6.5 1988 6.16 0.65 29.4 1,137 0.8 475 1,088 21,667 26,000 24 0.6 13 12 31 93 5 4.34 4.9 74 7.6 1989 6.02 0.79 28.9 1,128 1.1 398 912 21,727 26,073 19 0.4 11 11 47 90 7 3.32 3.5 92 7.6 1990 6.26 0.56 28.0 1,140 1.2 467 1,068 21,500 25,800 14 0.4 8 10 27 77 4 3.71 4.0 74 6.7 1991 6.21 0.44 29.8 1,143 2.9 '467 1,070 22,083 26,500 15 0.7 6 12 21 68 4 3.62 3.9 16 11.8 1992 6.32 0.41 29.1 1,220 3.6 556 1,273 20,917 25,100 16 0.7 5 14 19 57 4 3.17 3.4 17 9.6 1993 6.08 0.37 29.2 1,146 3.2 510 1,168 20,250 24,300 10 0.4 6 14 19 45 3 2.57 2.5 37 9.9 1994 6.08 • 0.42 28.8 917 4.9 570 1,305 23,083 27,700 8 0.3 5 12 25 47 4 2.31 2.1 41 7.8 1995 6.18 0.35 28.2 951 5.2 585 1,341 20,644 24,778 16 1.5 4 13 16 42 4 2.58 2.5 32 7.7 1996 6.20 0.35 29.7 996 6.2 572 1,310 8 1.0 1 13 26 37 4 1.90 1.7 21 4.5 1997 6.18 0.28 32.9 1,006 5.2 513 1,175 11 1.0 1 13 20 28 4 1.48 1.1 16 6.7 1998 6.23. 0.51 32.9 1,158 9.7 850 1,950 20 1.3 4 11 42 34 8 1.37 1.1 15.2 1999 6.20 0.37 30.6 1,047 6.6 813 1,860 28 1.8 2 12 40 28 6 1.10 < 1.0 16.3 2000 6.12 0.28 31.8 1,135 6.0 810 1,855 18,825 22,575 33 1.0 3 15 • 19 28 4 1.54 1.1 10.5 2001 6.00 0.47 32.2 1,015 8.5 708 1,620 20,675 24,825 36 1.5 2 15 31 48 6 2.14 1.8 35 9.7 2002 6.26 0.29 30.7 1,114 5.0 705 1,615 19,775 23,750 31 2.3 2 15 16 38 3 2.37 2.2 20 9.6 2003 6.34 0.28 32.2 1,200 4.0 740 1,693 19,663 23,625 30 2.0 3 14 17 35 3 2.10 1.8 27 7.2 2004 6.14 0.27 32.0 1,163 3.8 930 2,130 20,850 25,025 37 1.5 5 17 12 37 2 2.51 2.3 19 7.6 2005 6.27 0.23 33.3 1,093 2.5 895 2,050 18,675 22,400 35 2.0 4 16 12 32 2 2.28 2.0 13 6.3 2006 6.16 0.24 35.1 1,095 3.1 818 1,875 16,070 19,300 37 1.0 8 14 16 ` 29 3 179 1.3 10 8.6 2007 5.98 0.30 33.7 1,200 1.7 557 1,273 7,886 9,450 24 0.1 15 18 34 3 1.88 1.6 27 6.6 2008 6.06 0.38 31.9 1,052. 6.1 434 993 2,975 3,550 18 0.1 14 22 51 3 2.72 2.6 25 7.3 2009 6.04 0.38 32.6 1,228 6.2 588 1,345 2,816 3,375 12 0.2 9 16 19 55 4 3.09 3.1 31 7.7 2010 6.09 0.36 33.3 1,400 6.5 500 1,145 2,953 3,525 19 0.1 16 15 23 46 5 2.33 2.1 19 5.0 2011 6.03 0.27 35.6 1,340 6.2 595 1,363 3,733 4,475 21 0.1 32` 15 18 34 4 1.91 1.5 10 7.5 2012 6.01 0.34 35.6 1,618 5.9 446 1,020 2,615 3,175 17 0.1 29 15 23 38 5 1.94 1.6 21 6.5 2013 5.80 0.42 36.3 1,488 5.6 598 1,370 3,479 4,150 17 0.1 26 15 33 39 - 6 1.68 1.3 25 8.3 2014 5.98 0.33 34.1 1,260 5.5 489 1,120 2,887 3,475 20 0.3 15 14 20 42 4 2.25 2.0 9 7.4 2015 5.70 0.56 35.3 1,720 6.4 449 1,028 3,231 3,875 20 0.1 16 16 39 59 8 2.38 2.1 68 5.2 2016 6.04 0.40 37.0 1,880 8.9 439 1,005 3,704 4,450 17 0.2 10 17 21 47 5 2.51 2.3 31 10.1 2017 5.87 0.41 35.7 1,840 10.1 556 1,273 2,278 2,725 15 0.1 21 18 34 34 6 1.45 1.1 16 8.8 2018 5.89 0.53 34.4 1,913 9.1 370 848 3,110 3,746 16 0.1 30 16 38 46 10 1.81 1.6 176 6.4 • Maximum 6.34 1.08 37.0 1,913 10.1 930 2,130 24,727 29,672 37 10.9 32 18 47 93 10 4.34 4.9 176 16.3 Minimum 5.70 0.18 28.0 917 0.5 233 534 2,278 2,725 8 0.1 1 10 12 20 2 1.10 0.5 9 4.5 Average 6.09 0.41 31.8 1,207 4.4 564 1,291 14,627 17,554 21 1.0 10 14 25 44 4 2.27 2.1 37 8.1 #Tests 38 38 38 38 38 38 38 34 34 38 38 36 38 36 36 35 35 35 33 34 Site: S5a Ranch : Gansberg pH Salinity 11 10 _ 10 - 9 = 9 _ 8 7 8 Cl) 6 I 7 - 'c 5 6 E 4 5 3 2 4 - - 1 iN •3 0 ' •74.7.741T t ' ' ' ' O ' 1 OD22.129mmmommm�mmmmoz0Nv00n0m O ON2g22 'OmOOON21O2mOONCilVN81OmmO-NMA " mmmOOmmmmmOOOO.WOOmOOOONNNONOOOOOOOONOO m m m m m m m m m m m m m m m m m m O O O O O O O O O O O O O O O O O O O N N N N N N N N N N N N N N N N N N N —+—pH Linear(pH) Salinity Linear(Salinity) Cation Exchange Capacity Sodium Adsorption Ratio 50 20 • 40 - 15 cn 30 - - M 10 Cr - E 20 - 10 5 0 - � i � , ' , ' , ' ' t ' � � � � � � � ' �NON�(ON'71 N�O�NON CONO'hON,- 0 „ , , „ „ , , , , , NOHmmmm mmmmm0NV000NmN O _NmNmmmNm�mNm, mmO�0 NO, N 0 N N fm OO OO --�--CEC Linear(CEC) —+—SAR Linear(SAR) Site S6a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Neddenriep Type: DWB 2017 Inches: 06-12 EC TKN NO3 P P2O5 K K2O Cu Mo SO4 CEC Ca Na Mg Exch - CI Exch P Date pH mmho Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg.Kg me/100g mg/L mg/L mg/L SAR Na% mg/L mg/L 02/14/18 6.36 0.542 33.9 1,590 7.5 598 ' 1;370] 1,927; '2;321' 22 0.09 33.0 15.1 30.7 56.1 6.53 2.40 2.17 115 7.3 05/31/18 6.23 2.580 42.9 3,890 100.0 432 , _ 9901 2,4401. ,2,939) 12 0.06 46.0 19.8 206.0 102.0 107.00 1.44 < 1.00 60 35.7 08/15/18 6.85 0.550 30.1 2,000 8.3 122 . 2801 4,0501 • 4,879 17 0.04 23.0 21.8 37.2 22.4 7.81 0.87 < 1.00 325 31.4 11/08/18 7.55 0.858 45.6 2,930 15.6 186' 4261 3,980 ', 4,794 20 0.08 30.0 18.8 57.7 62.4 13.50 1.92 1.50 400 16.4 6 Maximum 7.55 2.580 45.6 3,890 100.0 598 1,370 4,050 4,879 22 0.09 46.0 21.8 206.0 102.0 107.00 2.40 2.17 400 35.7 Minimum 6.23 0.542 30.1 1,590 7.5 122 280 1,927 2,321 12 0.04 23.0 15.1 30.7 22.4 6.53 0.87 < 1.00 60 7.3 Average 6.75 1.133 38.1 2,603 32.8 335 766 3,099 3,733 18 0.07 33.0 18.9 82.9 60.7 33.71 1.66 1.42 225 22.7 #Tests 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Site S6a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Neddenriep Type: .DWB From: 1981 Inches: 06-12 To: 2017 EC TKN NO3 P P205 K K20 Cu Mo SO4 CEC Ca Na Mg Exch CI Exch P Year pH mmho Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg me/100g mg/L mg/L mg/L SAR Na% mg/L mg/L 1981 4.96 1.55 29.3 1,509 0.9 500 1,145 18,357 22,028 28 0.5 17 15 1982 5.60 1.27 56.3 2,145 3.2 672 1,539 17,111 20,533 30 0.2 42 15 1983 6.07 0.69 45.1 1,786 0.9 702 1,608 17,395 20,874 28 0.2 32 15 30 101 123 1984 5.94 0.30 43.6 1,797 0.7 701 1,605 19,055 22,866 28 0.4 15 17 10 43 2 3.30 3.5 35 1985 6.04 0.33 44.0 2,019 0.8 754 1,727 21,633 25,960 28 0.2 10 17 12 51 3 3.66 4.0 43 27.4 _ 1986 6.08 0.31 42.7 1,780 1.2 611 1,399 18,908 22,690 28 0.3 10 15 16 43 2 3.27 3.6 38 33.8 1987 6.13 0.59 41.6 1,815 0.5 732 1,676 20,000 24,000 32 0.3 15 15 26 84 5 4.16 4.6 112 37.7 1988 6.18 1.22 41.3 1,787 0.6 748 1,713 19,000 22,800 29 0.3 24 16 48 , 173 13 6.16 7.2 256 28.8 1989 6.12 0.83 39.5 1,672 0.6 614 1,405 20,727 24,873 29 0.2 17 14 28 123 6 5.61 6.5 155 23.3 1990 6.27 0.49 38.8 1,622 0.9 664 1,521 16,625 19,950 23 0.2 12 14 28 95 5 4.73 5.4 69 26.6 1991 5.97 0.69 37.9 1,534 1.6 680 1,557 19,833 23,800 22 0.2 12 17 23 111 5 5.46 6.3 132 56.4 1992 6.25 0.80 36.9 1,443 1.4 663 1,519 19,833 23,800 22 0.2 26 15 26 113 6 5.62 6.6 348 29.3 1993 6.54 0.60 36.4 1,369 2.3 603 1,382 19,833 23,800 17 0.2 10 18 19 100 5 5.49 6.4 90 37.2 1994 6.11 0.89 39.2 1,360 4.0 712 1,630 20,333 24,400 15 0.2 11 14 32 134 7 6.02 7.0 292 44.0 1995 6.01 0.78 36.4 1,322 9.2 684 1,567 20,126 24,111 24 0.5 11 14 36 99 12 4.65 5.2 91 27.8 1996 6.22 0.61 37.6 1,299 8.4 687 1,573 14 1.0 4 16 30 79 6 3.92 4.3 39 31.1 1997 6.03 0.30 42.5 1,157 2.6 556 1,273 21 1.0 7 14 12 40 2 3.26 3.5 27 36.9 1998 5.99 0.27 41.7 1,342 3.2 620 1,420 38 1.2 8 11 10 35 2 3.10 3.2 32.8 1999 6.38 0.31 42.7 1,490 3.1 740 1,697 34 1.5 4 16 15 39 3 2.57 2.4 39..4 2000 6.04 0.26 44.1 1,416 5.3 723 1,655 19,550 23,475 44 < 1.0 8 18 16 27 6 1.69 1.4 37.0 2001 6.38 0.42 42.1 1,358 3.4 690 1,582 17,125 20,550 42 2.3 4 17 17 60 4 3.46 3.6 65 36.3 2002 6.58 0.50 44.2 1,586 3.1 803 1,837 18,975 22,775 37 1.5 4 19 20 76 4 4.01 4.3 63 40.8 2003 6.47 0.36 45.0 1,553 1.9 858 1,965 19,055 22,850 35 1.0 9 18 17 47 3 3.07 3.1 42 35.0 2004 6.27 0.42 43.3 1,493 5.2 858 1,965 18,650 22,375 43 1.3 7 17 15 59 3 3.67 3.9 55 25.4 - 2005 6.29 0.43 41.3 1,525 3.8 908 2,080 18,950 22,725 42 1.0 9 17 26 44 4 _2.35 2.1 56 21.2 2006 5.96 0.46 43.9 1,380 4.2 857 1,963 15,443 18,525 44 0.9 13 18 15 78 3 5.21 5.9 56 38.4 2007 6.48 0.46 44.8 1,760 2.3 693 1,585 8,630 10,350 35 0.1 19 19 81 3 4.66 5.2 57 17.3 2008 6.46 0.47 41.2 1,347 3.7 698 1,598 3,592 4,300 24 0.1 18 18 83 3 4.92 5.5 46 26.2 2009 6.39 0.54 44.6 1,885 8.2 703 1,610 3,223 3,875 14 0.1 11 19 15 90 3 5.59 6.4 56 23.2 2010 6.24 0.64 44.8 2,113 12.8 729 1,668 3,466 4,150 25 0.1 28 20 26 88 5 4.44 4.9 64 26.2 2011 6.12 0.50 43.0 1,660 13.3 554 1,268 4,913 5,875 29 0.1 44 18 28 57 6 2.85 2.9 24 25.0 2012 6.38 0.92 44.2 1,983 12.0 690 1,580 3,092 3,725 24 0.2 45 19 48 107 11 4.21 4.6 157 19.8 2013 6.26 0.56 46.0 1,838 8.9 584 1,338 3,888 4,675 23 0.3 - 23 18 27 77 4 3.68 3.9 60 19.3 2014 6.44 0.55 44.5 1,998 7.7 615 1,408 4,473 5,375 25 0.3 17 `- 17 29 74 6 3.54 3.7 33 22.2 2015 6.18 0.64 41.2 2,067 11.2 420 965 4,229 5,075 30 0.1 21 17 25 97 15 4.37 4.8 42 12.8 2016 6.84 0.97 45.5 2,893 23.6 349 798 4,747 5,700 26 0.1 17 19 75 93 12 3.33 3.5 95 19.6 2017 6.90 0.62 42.7 2,158 15.7 469 1,075 2,524 3,025 16 0.1 19 20 59 41 8 1-.44 1.5 39 16.4 2018 6.75 1.13 38.1 2,603 32.8 335 766 3,099 3,733 18 0.1 33 19 83 61 34 1.66 1.4 225 22.7 Maximum 6.90 1.55 56.3 2,893 32.8 908 2,080 21,633 25,960 44 2.3 44.5 20 83 173 34 6.16 7.2 348 56.4 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 1.44 1.4 24 12.8 Average 6.22 0.62 42.0 1,707 5.9 663 1,517 13,717 16,459 28 0.5 17 17 27 78 6 3.97 4.4 93 29.3 #Tests 38 38 38 38 38 38 38 34 34 38 38 36 38 36 36 35 35 35 33 34 Site: S6a Ranch : Neddenriep pH Salinity I - 11 10 10 9 9 8 7 8 -_ N - _ 6 E 4 6 _ j - 3 5 = 2 4 1 �NMVl(�(Of�QO(AO•�NMC'1nfOI�ODWO�NMV'1f)(O1�0001Or�-�N�M��tl(1(CO�I�'(O O NMV't to COOO a-�N MV'lA CO ODOf Ot N C'��tn COT aD M�O�-N M��tA(Of�t0 O W E(O O W CO W O CA CA O g CA CA O CA O)CA 0 0 0 0 0 0 0 0 0 0 00 CO O m 2 CO m O m E CA(A O O O 2 CA 2 CA 0 0 0 0 0 0 0 0 0 0 CA CA CA m(A CA O(A CA CA CA O CA W W O O CA W 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 m CA CA m m M m..m m m m m m m m m m 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N —�pH Linear(pH) --o—Salinity Linear(Salinity) Cation Exchange Capacity Sodium Adsorption Ratio 50 20 40 - - 15 - 0 30 — o _ • a 10 - 1 E i - 5 - 10 0 ' ' ' , 'I(�O, , ' 1 ' S ' , , , , , , ' , ' , , ' ' , ! MN212R220NMVN8AOAOONM8OOOOOO -NM" h D OmtM�m OmOO O NM�OM, M�ONN � OtNON�NNOAmAAAAOAAWAOAAAOAONNNOOOOOOOONOOOONO V,ln'CO'1�'DO N N N N N N N N N —♦—CEC Linear(CEC) —'—SAR Linear(SAR) Site S7a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Bruns Type: JaC 2017 Inches: 06-12 EC TKN NO3 P P2O5 K K2O Cu Mo SO4 CEC Ca Na Mg . Exch CI Exch P Date pH mmho Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg.Kg me/100g mg/L mg/L mg/L SAR Na% mg/L mg/L 02/14/18 5.75 0.271 33.7 2,090 6.3 305 ' '6991 2,270 2;734; 27 0.06 27.0 13.2 25.0 7.19 6.58 0.33 < 1.00 6.5 9.1 05/31/18 5.84 0.131 40.9 2,140 2.0 486[.'.1,110'' 2,277 .2,743' 14 0.06 31.0 17.9 50.1 48.80 9.00 1.67 1.14 5.1 4.6 08/15/18 5.59 0.500 33.4 2,130 7.5 552 .1,260.j 6,584.I'• 7,9311 29 0.05 22.0 18.7 43.9 8.92 9.84 0.32 < 1.00 225.0 13.1 11/08/18 5.99 0.351 34.5 2,370 6.3 557 ' 1,280; 5,250 : 6,324' 19 0.05 28.0 13.5 25.9 9.26 7.99 0.41 < 1.00 275.0 8.6 I' Maximum 5.99 0.500 40.9 2,370 7.5 557 1,280 6,584 7,931 29 0.06 31.0 18.7 50.1 48.80 9.84 1.67 1.14 275.0 13.1 Minimum 5.59 0.131 33.4 2,090 2.0 305 699 2,270 2,734 14 0.05 22.0 13.2 25.0 7.19 6.58 0.32 < 1.00 5.1 4.6 Average 5.79 0.313 35.6 2,183 5.5 475 1,087 4,095 4,933 22 0.06 27.0 15.8 36.2 18.54 8.35 0.68 1.04 127.9 8.8 #Tests 4 4 4 . 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Site S7a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Bruns Type: JaC From: 1981 Inches: 06-12 To: 2017 • EC TKN NO3 P P2O5 K K2O Cu Mo SO4 CEC Ca Na Mg Exch CI Exch P Year pH mmho Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg me/100g mg/L mg/L mg/L SAR Na% mg/L mg/L 1981 5.58 0.67 37.5 1,384 0.9 301 689 20,371 24,445 305 0.8 '17 13 1982 5.77 0.26 39.4 1,728 4.5 520 1,191 18,522 22,226 33 0.5 14 13 1983 5.98 0.15 41.2 1,864 0.8 611 1,399 19,125 22,950 31 0.6 17 16 17 12 22 1984 5.87 0.17 40.8 1,858 0.9 574 1,314 21,964 26,357 31 0.7 8 15 14 19 3 1.29 1.0 12 1985 5.83 0.20 41.7 2,085 0.7 678 1,553 21,717 26,060 29 0.4 5 14 15 14 3 0.83 0.1 15.0 7.7 1986 5.84 0.18 40.4 1,946 0.5 606 1,388 20,067 24,080 32 0.4 6 14 15 11 3 0.70 < 1.0 15.0 7.2 1987 5.93 0.18 40.1 1,907 0.3 645 1,477 21,909 26,291 31 0.5 5 14 17 12 4 0.68 < 1.0 17.0 8.7 1988 6.05 0.24 40.9 2,098 0.5 630 1,443 20,000 24,000 33 0.5 9 15 27 15 6 0.66 < 1.0 15.0 10.1 1989 6.10 0.20 39.7 2,003 0.6 549 1,257 21,636 25,964 31 0.2 7 14 24 9 6 0.45 1.0 20.0 8.0 1990 6.30 0.19 39.1 3,063 0.7 564 1,291 18,625 22,350 23 0.4 7 14 21 10 5 0.49 1.0 20.0 5.8 1991 6.30 0.22 39.0 1,765 1.6 649 1,487 21,083 25,300 24 0.6 6 14 26 10 6 0.47 < 1.0 10.0 9.7 1992 6.27 0.30 37.9 1,882 3.1 668 1,530 20,667 24,800 23 0.6 5 17 32 11 8 0.44 < 1.0 22.0 9.5 1993 6.13 0.20 35.4 1,583 1.8 598 1,368 22,417 26,900 17 0.3 5 17 18 7 4 0.40 < 1.0 8.0 12.9 1994 6.14 0.18 37.4 1,607 1.4 683 1,563 23,083 27,700 14 0.3 7 15 20 9 5 0.46 < 1.0 7.0 7.3 1995 6.11 0.23 35.7 1,464 3.4 698 1,576 19,756 23,667 22 0.8 4 15 21 9 5 0.47 1.0 7.0 4.8 1996 6.15 0.26 36.1 1,445 2.7 644 1,475 15 1.0 1 15 24 17 6 0.64 1.1 7.0 4.1 1997 6.15 0.16 39.8 1,472 2.9 639 1,464 18 1.0 1 13 15 8 4 0.52 1.0 5.0 3.5 1998 6.21 0.13 39.9 1,511 32.4 900 2,060 32 1.2 33 11 12 9 3 0.60 < 1.0 5.1 1999 6.12 0.15 43.6 1,898 12.1 885 2,027 65 1.8 2 17 16 10 3 0.63 < 1.0 8.6 2000 6.29 0.15 39.3 1,683 2.8 850 1,945 20,225 24,300 45 < 1.0 51 16 12 13 3 0.92 < 1.0 5.8 2001 6.06 0.28 42.8 1,788 5.2 815 1,867 20,150 24,200 47 2.3 2 18 29 11 6 0.51 < 1.0 9.0 11.1 2002 6.14 0.37 38.9 1,705 9.9 790 1,810 20,325 24,400 40 1.3 2 17 35 14 8 0.64 < 1.0 8.0 10.7 2003 6.46 0.21 40.0 1,578 3.2 845 1,938 20,950 25,150 41 1.5 3 16 22 6 5 0.32 1.0 4.6 9.0 2004 6.33 0.20 41.1 1,725 2.9 978 2,240 21,150 25,375 48 1.3 4 18 19 7 4 0.36 < 1.0 6.3 10.9 2005 6.25 0.16 43.4 1,800 2.8 1,023 2,343 19,900 23,875 46 1.3 3 18 17 6 3 0.36 < 1.0 3.4 8.4 2006 6.10 0.15 42.7 1,598 2.6 910 2,085 17,084 20,500 49 0.8 2 14 14 6 3 0.37 < 1.0 3.3 8.5 2007 5.96 0.19 44.1 2,058 1.2 699 1,600 8,629 10,350 34 0.2 17 22 - 9 4 0.47 < 1.0 7.9 6.0 2008 6.03 0.22 41.8 1,715 4.7 622 1,425 4,547 5,425 25 0.1 17 28 9 5 0.43 < 1.0 6.3 6.1 2009 5.78 0.21 42.7 1,938 4.1 674 1,545 5,502 6,625 15 0.2 7 17 18 11 4 0.62 < 1.0 7.9 5.6 2010 6.09 0.24 41.9 2,285 3.6 - 632 1,448 5,120 6,150 29 0.1 9 17 27 8 6 0.36 < 1.0 6.2 5.4 2011 5.82 0.25 39.8 1,705 7.5 548 1,255 6,217 7,450 31 0.1 38 16 23 8 5 0.39 < 1.0 5.2 4.5 2012 _ 5.87 0.25 40.4 1,727 7.6 505 1,155 4,920 5,900 25 0.1 43 15 24 9 5 0.46 < 1.0 7.1 7.6 2013 5.76 0.27 41.7 1,833 4.6 465 1,063 6,225 7,450 25 0.3 19 14 30 9 5 0.43 < 1.0 13.5 6.3 2014 5.75 0.26 43.7 2,183 6.7 574 1,315 4,683 5,600 26 0.2 14 16 27 8 5 0.38 < 1.0 4.8 7.2 2015 5.55 0.45 41.7• 2,758 13.3 556 1,273 4,305 5,150 29 0.2 20 17 42 12 24 0.37 < 1.0 3.8 10.4 2016 5.76 0.26 42.1 2,613 6.8 473 1,083 " 6,355 7,625 - 24 0.2 13 16 25 7 6 0.39 < 1.0 5.0 13.9 2017 5.81 0.38 40.9 2,428 12.3 363 833 3,641 4,375 20 0.1 23 17 37 8 8 0.32 < 1.0 6.1 11.3 2018 5.79 0.31 35.6 2,183 5.5 475 1,087 4,095 4,933 22 0.1 27 16 36 19 8 0.68 1.0 127.9 8.8 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 1.1 127.9 13.9 Minimum 5.55 0.13 35.4 1,384 0.3 301 689 3,641 4,375 14 0.1 1 11 12 6 3 0.32 0.1 3.3 3.5 Average 6.01 0.24 40.3 1,891 4.7 654 1,496 15,146 18,174 38 0.6 12 15 23 10 6 0.53 1.0 13.3 8.0 #Tests 38 38 38 38 38 38 38 34 34 38 38 36 38 36 36 35 35 35 33 34 Site: S7a Ranch : Bruns i , pH Salinity I 11 _ 10 10 _ 9 8 9 - = 7 1 8 6 1 - c a 7 = E 5 E 4 _ 6 3 5 - _ 4 _ 1 _ 3 p 'N'M��A�(O�I��a0�0��01�—�N�M'V'tn�(O 1�O,O),O�—�N M ZS OD O�O�'—�N M��'��A�(O�l�CO NMV'to(OI�aDmOa—NM�tn(O1�OD O:O N VN((0h c0 0_,_:,-g 2 g 2 2 ao 2 2 8 rn o'rn O).rn 8 rn 2 SI o o 0 0 0 0 0 0 0 o "lc (o m ao 0o m m m m rn rn rn.rn rn rn rn rn rn'FP:o 0 0 0 0 0 0 0 0 0 O O O O O O O O O O O O O O O O O O N N N N N(OV 222222220, :,722,84 N N N N N N N N N N N N O O O M O O O O O O O O O O O M O O O N N N N N N N N N N N N N N N N N N N I 1 --+—pH Linear(pH) --.–Salinity Linear(Salinity) ill Cation Exchange Capacity Sodium Adsorption Ratio 50 20 i 1 40 - 15 - i co 30 _ - = a 10 v- - co fl, - E 20 _ - 5 10 i - 1 0 N M��(O f�OD 01 O N M Q In(D 1�O W O.-N M Q In(O I�O O O r N cc;,' :0:, 'L(7(O I.O NMC lf)(O1-CD OO�NM�!'ln(O(�COW0�NM Vtn(OI�CD O'O1 00 t0 00 00 OD 00 CO 00 c0 W O O O O O O O W W 0 0 0 0 0 0 0 0 0 0 _ m Cp Cp ap m 00 OD(O f0 O O OI O]O O m O)O)0 0 0 0 0 0 0 0 0 0 0 , O O O O O O O O O O O O O O O O O O O N N N N N N N N N N N N N N N N N N N O O O O O O O O O O O O O O O O O O O N N N N N N N N N N N N N N N N N N N i 1 —.--CEC Linear(CEC) —+—SAR Linear(SAR) ALPINE COUNTY MONITORING WELLS Site: ACMW-01AW SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 01/09/18 9.7 5483.4 10.9 6.61 37.9 0.026 < 0.150 0.031 < 0.010 0.134 0.213 04/04/18 6.13 5487.0 10.7 6.74 40.8 0.027 < 0.070 < 0.020 < 0.010 0.183 0.184 08/06/18 7.09 5486.0 12.6 6.41 32.5 0.024 < 0.050 < 0.020 < 0.010 1.14 1.12 10/23/18 7.32 5485.8 14.0 6.53 39.9 0.042 < 0.050 0.020 < 0.010 0.469 0.466 Maximum 9.70 5487.0 14.0 6.74 40.8 0.042 < 0.150 0.031 < 0.010 1.14 1.12 Minimum 6.13 5483.4 10.7 6.41 32.5 0.024 < 0.050 < 0.020 < 0.010 0.134 0.184 Average 7.56 5485.6 12.1 6.57 37.8 0.030 0.080 0.023 < 0.010 0.482 0.496 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-01AW SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Total Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 01/09/18 77 87.6 1.92 3.34 < 1 < 1 04/04/18 83 53.4 1.27 3.00 < 1 < 1 08/06/18 79 87.6 3.37 2.97 < 1 < 1 10/23/18 75 98.0 3.43 4.62 3.1 < 1 Maximum 83 98 3.43 4.62 3.1 < 1 Minimum 75 53.4 1.27 2.97 < 1 < 1 Average 79 81.7 2.50 3.48 1.5 < 1.0 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-01AW SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 1989 To: 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L - mg/L mg/L 89 9.0 5480.7 10.4 6.86 41.0 26 46.02 0.142 0.107 0.027 < 0.010 0.306 0.387 90 7.7 5481.1 11.1 6.91 61.-0 54 36.80 0.090 0.084 0.021 < 0.010 0.278 0.373 91 7.1 5481.6 11.1 7.26 41.0 38 32.73 0.087 0.106 0.040 0.012 0.233 0.350 92 7.8 5480.9 11.4 6.79 58.0 52 1.52 0.035 0.106 0.026 0.010 0.211 0.327 93 7.2 5481.5 11.3 6.85 52.0 51 16.25 0.036 0.116 0.027 0.011 0.588 0.715 94 7.9 5481.9 10.2 6.82 46.0 39 3.77 0.028 0.088 0.029 0.010 0.229 0.326 95 6.5 5482.2 11.6 6.55 64.0 63 1.60 0.023 0.103 0.031 0.011 1.054 1.168 96 6.3 5482.4 12.2 6.50 64.0 58 16.87 0.074 0.097 0.022 0.010 0.542 0.648 97 7.4 5481.3 11.9 6.49 55.0 49 2.93 0.033 0.104 0.037 0.011 1.013 1.129 98 6.3 5482.4 11.3 6.27 44.0 48 1.07 0.028 0.132 0.021 0.012 0.312 0.457 99 6.3 5482.4 11.2 6.26 44.0 44 2.23 0.026 0.108 < 0.020 _ < 0.010 0.204 0.322 00 6.2 5482.5 10.8 6.71 43.0 52 1.26 0.041 0.160 0.020 < 0.010 0.604 0.701 01 6.8 5481.9 10.7 6.82 35.0 45 9.89 0.062 0.142 0.036 < 0.020 0.380 0.578 02 6.3 5482.4 10.5 6.50 34.0 54 14.63 0.038 0.126 < 0.017 0.611 1.011 03 6.9 5481.8 11.2 6.93 39.1 1.85 0.024 0.112 < 0.015 0.870 1.263 04 6.0 5482.7 10.1 6.77 42.7 63 3.40 0.025 0.110 0.020 < 0.015 1.215 1.633 05 6.1 5482.6 9.7 6.75 41.8 48 10.25 0.033 0.129 < 0.009 0.516 0.629 06 - 5.0 5483.7 10.8 6.74 38.2 33 15.77 0.045 0.440 < 0.010 0.132 0.309 07 6.1 5482.6 11.0 6.48 41.8 37 11.45 0.032 0.055 < 0.011 0.362 0.400 08 5.6 5483.1 10.5 6.64 _A2.4 35 26.04 0.050 0.081 < 0.013 1.282 1.329 09 5.7 5483.0 9.4 6.63 36.7 37 23.53 0.068 0.081 < 0.010 0.683 0.813 10 5.3 5483.4 9.3 6.33 44.0 63 10.75 0.030 0.065 < 0.020 1.989 2.041 11 5.3 5483.4 10.1 6.79 40.5 33 19.65 0.041 < 0.055 < 0.012 0.491 0.484 12 6.7 5486.5 10.6 6.75 31.7 0.049 0.072 0.022 < 0.010 0.177 0.275 13 6.3 5486.9 10.7 6.75 46.0 0.042 0.102 0.028 < 0.010 0.108 0.176 14 7.5 5485.6 10.7 6.73 38.1 0.153 0.082 0.021 < 0.011 0.143 0.165 15 11.2 5482.0 11.0 6.67 33.8 0.022 0.054 0.020 < 0.010 0.121 0.152 16 6.3- 5486.8 11.4 6.57 35.4 0.032 < 0.055 < 0.020 < 0.010 0.542 0.488 17 5.8 5487.3 11.4 6.55 38.5 0.022 < 0.083 0.028 < 0.010 0.389 0.391 18 7.56 5485.6 12.1 6.57 37.8 0.030 0.080 0.023 < 0.010 0.482 0.496 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 6.7 5483.1 10.9 6.67 43.7 46 13.49 0.048 0.108 0.026 0.012 0.536 0.651 #Tests 30 30 30 30 30 22 23 30 30 21 30 30 30 Site: ACMW-01AW - SOUTH TAHOE PUBLIC UTILITY DISTRICT -, .PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2018 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 89 78 97 1.6 5 6.35 3 < 2 90 94 123 1.5 6 5.43 < 5 2 < 2 91 84 88 1.5 < 5 6.95 < 5 3 < 2 92 87 122 2.0 < 5 3.33 < 5 2 < 2 93 92 120 2.8 5 5.52 < 5 2 2 < 2 94 77 106 3.0 < 5 4.42 10 2 < 2 95 106 162 7.6 5 3.02 5 7 2 96 109 147 5.0 2 4.39 5 12.3 1 97 97 132 4.3 2 3.28 5 2.3 1 , 98 77 101 2.6 < 5 1.84 < 5 3.4 < 1.1 99 77 104 1.7 < 5 3.03 5 2.3 1.1 00 79 101 3.3 < 5 1.86 < 5 1.2 < 1.1 01 76 83 2.9 8 2.28 30 1.7 < 1.1 02 78 89 4.3 < 5 2.58 < 5 1.3 < 1.1 03 84 104 4.6 5 2.62 5 1.1 1.1 04 89 119 7.1 6 2.77 10 1.3 < 1.1 05 82 108 4.6 < 5 3.64 18 1.2 < 1.1 06 84 92 1.8 < 5 3.83 1.3 < 1.1 07 79 95 1.7 7 2.33 < 1.1 < 1.1 08 91 107 3.7 < 5 2.80 60 < 1.3 <, 1.1 09 86 94 3.1 6 2.74 1.5 < 1.1 10 96 132 7.3 < 5 2.61 1.1 < 1.1 11 90 99 2.5 5 4.01 1.2 < 1.1 12 81 70 1.1 2.31 1.7 < 1.1 13 83 96 1.3 3.24 1.4 < 1.1 14 75 83 1.4 3.78 1.9 < 1.1 15 70 79 1.4 4.73 2.4 < 1.0 16 95 118 1.6 5.30 9.6 < 1.0 17 78 90 2.0 3.61 1.0 < 1.0 18 79 81.7 2.50 3.48 1.5 < 1.0 Maximum 109 162 7.6 8 6.95 60 12.3 2.0 < 2 Minimum 70 70 1.1 2 1.84 < 5 1.0 1.0 < 2 Average 85 .105 3.1 5 3.60 11 2.5 1.3 < 2 #Tests 30 - 30 30 23 30 17 30- 30 1 Site ACMW-OIAW Nitrate-Nitrogen and Water Level Chlorides 5 - -5495 50 _ 4 5490 - 40 3 :::: J 15 20 1 5475 10 0 - - , , r . -5470 0 , , , . , . , , , , . . , . , . , 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 —•—Nitrate Water Level t Chloride • Total Dissolved Solids (TDS) Total Phosphorus 500 0.50 - 400 0.40 300 0.30 ` J J E - E 200 0.20 100 0.10 molgur0 0.00 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 ---�—TDS Linear(TDS) ---.--Total P Linear(Total P) Annual Metal Report ACMW-01AW Main Dam Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 10/31/1988 12 1.1 3.6 6.8 <10 2400 <4 40 <0.1 <10 <20 820 <0.2 90 <5 <50 <1 <1 <10 11/28/1989 9.4 1 4.1 6.1 <10 1300 <10 110 <1 <10 <50 1700 <1 120 <10 <5 <50 8/1/1990 12 1.5 3.7 7.1 <10 1100 <4 84 <0.1 <10 <20 860 <0.2 100 1 <1 <10 8/21/1991 9 1 3.1 5.2 <10 600 <4 61 <0.1 <10 <20 550 <0.2 64 2 <1 <10 7/21/1992 14 1 4 7.2 <10 76 <4 55 <0.1 <10 <20 72 <0.2 <10 <1 <1 <10 7/12/1994 11 0.9 3.2 5.4 <10 660 <2 45 0.1 <10 <20 410 <0.2 7.1 <1 <1 7.2 8/15/1995 15 1.1 4.4 6.8 <10 310 <1 65 <0.1 <10 <10 160 <0.2 <5 <1 <1 <5 6/19/1996 18 1.2 5.3 6.9 <10 120 <1 76 <0.1 <10 <10 <30 <0.2 <5 <1 <1 <5 6/16/1997 14 1.4 4.3 7.2 <10 250 <2 56 <0.5 <10 <25 200 <0.5 <10 <5 <5 <50 7/21/1998 12.3 0.918 3.36 5.15 <10 <25 <2 <100 <0.5 <10 <20 83.4 <0.5 <20 <2.5 <5 <25 6/20/1999 5.71 0.548 1.76 2.99 <10 530 <2 <100 <1 0.28 <10 <20 115 <0.2 <20 <5 <2.5 <3 <1 <1 <10 7/18/2000 7.40 0.928 2.84 5.38 <10 <2 <100 <20 367 <20 <2.5 <10 6/19/2001 6.65 0.760 2.01 4.25 <10 <2 <100 <20 548 <20 <2.5 <10 6/18/2002 6.61 0.878 2.13 4.32 <10 400 <2 35 <0.2 <0.2 <1 <20 372 0.02 <20 <1 <2.5 <1 <2 <0.2 <10 6/17/2003 7.18 0.938 2.42 4.84 <10 300 <2 35.7 <0.2 <0.2 <1 <20 242 <0.01 <20 <1 <2.5 <1 <2 <0.2 <10 5/18/2004 7.78 0.866 2.46 4.83 <10 440 <2 <100 <0.2 <0.2 <1 <20 339 0.01 <20 < <1 <2.5 <1 <2 <0.2 _ <10 6/14/2005 8.73 0.793 2.72 4.64 <10 <2 <100 <20 507 <20 <2.5 <10 6/1/2006 7.84 1.11 2.76 4.91 <10 1200 3.42 <2 <2 <2 <20 1890 <0.2 23.8 <2 2 <2.5 <2 <10 <1 ' 2 169 6/19/2007 8.90 0.894 2.53 5.11 <10 420 <2 37 <1 <0.5 <1 <20 25.3 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/4/2008 9.84 1.24 3.30 6.13 <10 4300 2.92 68 <1 <0.5 <1 <20 141 <0.2 26.8 <2 <5 <2.5 <1 <5 <1 <3 <10 6/17/2009 8.15 0.932 2.46 5.68 <10 830 <2 41 <1 <0.5 <1 <20 416 <0.2 33.9 <2 <5 <2.5 <1 <5 <1 <3 11.3 6/9/2010 14.0 1.10 4.20 6.80 <0.5 88 <1 63 <1 <0.5 <1 <2 56 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2011 8.41 1.01 2.86 5.58 <0.5 2430 <1 47.9 <1 <0.5 <1 <2 1100 <0.2 8.11 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2012 854 6.02 87.5 <1 <0.5 8.42 <0.2 5.47 13.4 <1 <5 <1 13.3 6/18/2013 9.77 1.05 2.7 5.53 6/17/2014 7.79 <1 2.48 5.05 <0.5 151 1.46 36.5 <1 <0.5 <1 <2 405 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/15/2015 8.13 <1 2.51 4.56 <0.5 218 <1 40.1 <1 <0.5 <1 <10 179 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/12/2016 7.63 1.03 2.47 4.26 <0.5 1960 <1 46.9 <1 <0.5 1.03 <2 1610 <0.2 16.7 <2 <5 <0.5 <1 <5 <1 <3 <20 7/19/2017 8.78 1.03 2.6 4.58 <0.5 676 <1 44.4 <1 <0.5 <1 <2 647 <0.2 3.29 <2 <5 <0.5 <1 <5 <1 <3 <20 8/6/2018 8.27 <1 2.35 4.68 <0.5 399 <1 41.6 <1 <0.5 <1 <2 235 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-01 BE SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 01/09/18 19.36 5484.2 8.2 6.78 43.3 0.033 < 0.150 0.029 < 0.010 0.161 0.239 04/04/18 3.99 5499.6 7.5 6.76 47.5 0.033 < 0.070 < 0.020 < 0.010 0.257 0.254 08/06/18 9.00 5494.6 9.3 6.16 48.1 0.030 < 0.050 < 0.020 < 0.010 0.093 0.088 10/23/18 12.60 5491.0 10.0. 6.58 48.9 0.042 < 0.050 < 0.020 < 0.010 0.159 0.186 Maximum 19.36 5499.6 10.0 6.78 48.9 0.042 < 0.150 0.029 < 0.010 0.257 0.254 Minimum 3.99 5484.2 7.5 6.16 43.3 0.030 < 0.050 < 0.020 < 0.010 0.093 0.088 Average 11.24 5492.3 8.8 6.57 47.0 0.035 0.080 0.022 < 0.010 0.168 0.192 #Tests 4 4 4 4 4 0 0 - 4 4 4 4 4 4 Site: ACMW-01 BE SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Total Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 01/09/18 90 94 1.24 3.24 < 1 < . 1 _ 04/04/18 91 90 1.05 2.66 < 1 < 1 08/06/18 86 93 1.02 - 3.32 < 1 < 1 10/23/18 82 103 1.48 3.18 < 1 < 1 Maximum 91 103 1.48 3.32 < 1 < 1 Minimum 82 90 1.02 2.66 < 1 < 1 Average 87 95 1.20 3.10 < 1.0 < 1.0 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW=01 BE SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 1989 - To: 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N , Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 89 10.5 5491.8 9.8 7.05 72.0 50 8.22 - 0.040 0.109 0.035 < 0.012 0.371 0.456 90 10.1 5491.0 9.1 7.02 51.0 40 4.37 0.025 0.085 0.025 < 0.010 0.157 0.252 91 18.2 5482.9 9.7 7.23 57.0 46 18.50 0.063 0.093 0.038 0.011 0.185 0.288 82 12.9 5488.2 10.4 6.91 50.0 39 24.00 0.053 0.113 0.028 0.010 0.163 0.287 83 10.8 5490.3 10.2 6.87 63.0 67 7.75 0.031 0.069 0.021 0.010 0.728 0.807 94 11.1 5490.0 10.4 6:62 60.0 56 2.07 0.030 0.083 0.025 0.010 0.318 0.410 95 8.1 5493.0 9.8 6.67 69.0 66 0.73 0.025 0.197 0.047 0.011 0.405 0.613 96 7.9 5493.2 11.2 6.44 67.0 66 1.74 0.018 0.099 0.020 0.011 0.438 0.548 97 11.1 5490.1 11.0 6.35 68.0 68 1.50 0.019 0.088 0.021 0.018 0.821 0.928 98 8.4 5492.7 10.1 -6.24 52.0 47 -;3.10 0.022 0.116 < 0.020 < 0.010 0.541 0.668 99 9.0 5492.1 10.1 6.29 56.0 55 0.76 0.021 0.111 < 0.020 < 0.010 0.449 0.570 00 9.7 5491.4 10.6 6.81 47.0 39 5.80 0.029 0.100 0.022 < 0.010 0.169 0.233 01 11.6 5489.5 10.2 6.80 43.0 31 3.91 0.031 0.109 0.020 < 0.010 0.200 0.319 02 9.9 5491.2 8.6 6.52 37.0 30 10.11 0.029 0.126 < 0.010 0.142 0.284 03 11.5 5489.6 9.8 6.84 39.6 7.77 0.026 0.099 0.012 0.587 0.687 04 10.0 5491.1 9.8 6.57 43.6 25 4.25 0.039 0.119 < 0.020 < 0.010 0.128 0.263 05 9.5 5491.6 11.1 6.47 42.4 35 4.35 0.027 0.089 < 0.010 0.204 0.222 06 5.8 5495.3 11.3 6.41 44.9 38 12.40 0.027 0.203 < 0.010 0.425 0.580 07 10.5 5490.6 11.1 6.31 38.7 30 13.80 0.037 0.055 < 0.010 0.125 0.163 08 11.6 5489.5 9.4 6.53 33.2 33 9.35 0.039 0.073 < 0.010 0.193 0.233 09 12.3 5488.8 9.3 6.50 40.2 34 6.07 0.144 0.084 < 0.010 0.198 0.250 10 10.5 5490.6 9.7 6.47 46.7 38 7.95 0.031 < 0.050 < 0.010 0.242 0.279 11 8.0 5493.1 10.3 6.17 56.7 59 7.10 0.039 < 0.060 < 0.010 0.886 0.849 12 12.7 5490.9 8.5 6.27 53.9 0.027 < 0.046 0.023 < 0.010 0.279 0.373 13 10.8 5492.7 7.3 6.29 47.6 0.067 < 0.080 0.025 < 0.009 0.177 0.228 14 12.4 5491.2 8.2 6.50 50.0 0.043 0.052 0.021 < 0.011 0.151 0.139 15 13.9 5489.7 10.5 6.81 61.1 0.026 < 0.050 0.020 <- 0.010 0.143 0.159 16 8.8 5494.8 8.5 6.34 76.2 0.076 < 0.055 < 0.020 < 0.010 0.213 0.181 17 6.0 5497.5 9.6 6.43 50.2 0.025 < 0.083 0.023 < 0.010 0.421 0.411 18 11.24 5492.3 8.8 6.57 47.0 0.035 < 0.080 0.022 < 0.010 0.168 0.192 Maximum 18.2 5497.5 11.3 7.23 76.2 68 24.00 0.144 0.203 0.047 0.018 0.886 0.928 Minimum 5.8 5482.9 7.3 6.17 33.2 25 0.73 0.018 0.046 < 0.020 < 0.009 0.125 0.139 Average 10.5 5491.2 9.8 6.58 52.1 45 7.20 0.038 0.092 0.025 0.010 0.321 0.396 #Tests 30 30 30 30 30 22 23 30 30 21 30 30 30 Site: ACMW-01 BE SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2018 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 89 101 168 3A 5 4.63 < 2 < 2 90 75 112 1.5 6 3.64 < 5 < 2 < 2 91 88 118 1.7 < - 5 6.01 < 5 3 < 2 82 80 105 1.4 6 5.17 < 5 2 '< 2 83 103 140 1.7 13 4.49 < 5 < 2 2 < 2 94 85 129 1.7 < 5 3.54 < 4 < 2 < 2 95 94 144 1.9 5 2.90 5 2 2 96 99 140 1.8 2 2.19 5 1 1 97 102 145 2.1 4 2.89 5 1 1 98 80 111 1.1 < 5 2.05 < 5 < 1.0 < 1.1 99 86 121 1.3 < 5 2.63 < 5 < 1.2 < 1.1 00 77 97 0.9 < 5 1.49 < 5 < 1.1 < 1.1 01 69 85 1.4 8 1.27 13 < 1.1 < 1.1 02 66 81 2.5 < 5 1.29 10 < 1.1 < 1.1 03 77 90 1.9 5 1.62 8 1.1 1.1 04 79 91 1.7 < 5 1.76 8 < 1.1 < 1.1 05 75 92 1.5 < 5 1.56 5 < 1.1 < 1.1 06 83 97 1.3 < 5 1.33 < 1.1 < 1.1 07 74 83 1.2 5 1.39 < _ 1.1 < 1.1 08 71 74 1.8 < 5 1.61 20 < 1.4 < 1.1 09 83 89 1.5 5 1.13 < 1.1 < 1.1 10 79 103 1.3 < 5 1.22 < 1.1 < 1.1 11 95 125 1.9 < 7 1.33 < 1.1 < 1.1 12 97 112 1.4 1.95 < 1.1 < 1.1 13 86 100 1.4 1.98 < 1.1 < 1.1 14 89 101 1.4 2.31 < 1.1 < 1.1 15 98 128 1.4 3.03 < 1.0 < 1.0 16 121 156 1.6 2.83 < 1.0 < 1.0 17 91 110 2.1 2.56 < 1.0 < 1.0 18 87 95 1.20 3.10 < 1.0 < 1.0 Maximum 121 168 3.1 13 6.01 20 3.0 2.0 < 2 Minimum 66 74 0.9 2 1.13 < 4 < 1 < 1.0 < 2 Average 86 111 1.6 6 2.50 7 1.3 1.3 < 2 #Tests 30 30 _ 30 23 30 17 30 30 1 J Site ACMW-01 BE Nitrate-Nitrogenand Water Level Chlorides 5 5510 50 4 5500 40 3 5490 ., 30 2 5480 $ 20 1 5470 10 o 5460 0 , , , , , , __ , O r C7 1� O' a-- M Ln 1� 01 •-- 0.) 1� O i- M to , ao O co O O CO O O O O O •(- CO O O O O O O O O O O —+—Nitrate =.--Water Level —.—Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 - 0.20 - 400 0.15 300 J - J 0.10 200 - 0.05 iEMMA 100 0 0.00 O 0 Ln CO M LO 0 M LO N 0 c- M LO t� O 00 O -.CO O O O O O O O O CO Cr, CO O O O O O O O O v- A- v- TDS Linear(TDS) —.—Total P Linear(Total P) Annual Metal Report ACMW-01BE Secondary Dam Ca K Mg Na Ag Al As . Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 10/31/1988 10 1.4 4.6 7.1 <10 700 <4 30 <0.1 <10 <20 690 <0.2 420 <5 <50 <1 <1 <10 11/28/1989 12.5 1 5 13.8 <10 110 <10 <100 <1 <10 <50 150 <1 120 <10 <5 <50 8/1/1990 8.8 0.6 3.3 5.3 <10 90 <4 34 <0.1 <10 <20 37 <0.2 25 <1 <1 <10 8/21/1991 11 0.9 5 5.4 <10 210 <4 49 <0.1 <10 , <20 180 <0.2 54 <1 <1 <10 7/21/1992 10 0.8 4.1 5.4 <10 200 <4 45 <0.1 <10 <20 230 <0.2 49 <1 <1 <10 7/19/1994 11 0.8 4.4 5.8 <10 500 <2 54 0.1 <10 <20 330 <0.2 53 <1 <1 6.1 8/15/1995 13 0.8 5.3 6.5 <10 64 <1 59 <0.1 <10 <10 180 <0.2 80 <1 <1 9.5 6/19/1996 18 1 7.5 7.6 <10 140 <1 88 <0.1 <10 <10 220 <0.2 77 _ <1 <1 <5 6/16/1997 17 1.2 7.4 8.9 <10 170 <2 97 <0.5 <10 <25 480 <0.5 <10 <5 <5 <50 7/21/1998 7.85 0.687 3.25 5.52 <10 58 <2 <100 <0.5 <10 <20 333 <0.5 37.2 <2.5 <5 <25 6/20/1999 12.3 1.04 5.9 8.05 <10 160 <2 <100 <1 <0.1 <10 <20 171 <0.2 38.2 <5 <2.5 <3 <1 <1 <10 7/18/2000 9.85 1.19 3.05 10.3 <10 <2 <100 <20 78.6 54.4 <2.5 <10 6/19/2001 7.08 0.600 2.86 5.82 <10 <2 <100 <20 <100 <20 <2.5 <10 6/18/2002 6.60 0.589 2.54 5.7 <10 110 <2 37 <0.2 <0.2 <1 <20 135 0.02 <20 . <1 <2.5 <1 <2 <0.2 <10 6/17/2003 5.86 1.02 2.95 5.99 <10 300 <2 39.9 <0.2 <0.2 <1 <20 330 <0.01_ <20 <1 <2.5 <1 <2 <0.2 <10 5/18/2004 8.10 0.635 3.49 6.44 <10 210 <2 <100 <0.2 <0.2 <1 <20 126 0.01 <20 <1 <2.5 <1 <2 <0.2 <10 6/14/2005 10.20 0.562 4.20 7.00 <10 <2 <100 <20 121 <20 <2.5 <10 6/1/2006 9.9 0.791 4.08 7.11 <10 120 <2 <2 <2 <2 <20 328 <0.2 <20 <2 <2 <2.5 <2 <10 <1 <2 <10 6/19/2007 7.34 0.659 2.93 5.96 <10 88 2.12 37 <1 <0.5 <1 <20 601 . <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/4/2008 5.09 0.557 2.20 5.11 <10 1200 <2 35 <1 <0.5 <1 <20 626 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/17/2009 7.54 1.04 3.35 6.63 <10 1500 2.22 47 <1 <0.5 <1 <20 2820 <0.2 179 <2 <5 <2.5 <1 <5 <1 <3 17.5 6/9/2010 9.2 <1 3.90 6.90 <0.5 110 <1 44 <1 <0.5 <1 2.3 220 <0.2 7 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2011 14.1 1 6.16 9.04 <0.5 42.6 <1 60.4 <1 <0.5 <1 <2 545 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2012 24.9 <1 56.2 <1 <0.5 <1 <0.2 <2 <5 <1 <5 <1 <3 6/18/2013 7.35 0.562 2.91 5.69 6/17/2014 9.60 <1 4.35 6.89 <0.5 457 1.56 51.4 <1 <0.5 <1 <2 579 <0.2 23.7 <2 <5 <0.5 <1 <5 <1 <3 <20 7/15/2015 11.0 1.37 5.36 7.30 <0.5 3600 <1 85.3 <1 <0.5 3.83 <10 4660 <0.2 106 2.24 <5 1.71 <1 <5 <1 8.92 <20 7/12/2016 s 14.8 <1 6.3 8.32 \ <0.5 867 <1 76.8 <1 <0.5 <1 <2 885 <0.2 15.3 <2 <5 <0.5 <1 <5 <1 <3 <20 7/19/2017 i• 7.53 <1 3.29 5.47 <0.5 736 <1 41.0 <1 <0.5 <1 <2 779 <0.2 15.0 <2 . <5 <0.5 <1 <5 <1 <3 <20 8/6/2018 8.76 <1 3.68 5.94 <0.5 446 <1 44.2 <1 <0.5 <1 <2 292 <0.2 5.95 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-02N SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N, NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 01/09/18 8.41 5461.3 11.9 6.68 60.8 0.023 < 0.150 0.031 < 0.030 2.070 2.00 04/04/18 7.26 5462.4 12.2 6.61 67.7 0.026 < 0.070 < 0.020 < 0.010 1.210 1.13 08/06/18 6.86 5462.8 14.4 6.08 60.2 0.021 < 0.050 < 0.020 < 0.010 0.618 0.641 10/23/18 7.80 5461.9 14.0 6.59 62.4 0.036 < 0.050 < 0.020 < 0.010 0.651 0.694 Maximum 8.41 5462.8 14.4 6.68 67.7 0.036 0.150 < 0.031 < 0.030 2.070 2.000 Minimum 6.86 5461.3 11.9 6.08 60.2 0.021 < 0.050 < 0.020 < 0.010 0.618 0.641 Average 7.58 5462.1 13.1 6.49 62.8 0.027 0.080 0.023 < 0.015 1.137 1.116 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-02N SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 01/09/18 107 147 1.83 2.62 < 1 < 1 04/04/18 116 148 1.72 3.46 < 1 < 1 08/06/18 95 129 1.48 2.97 7.4 < 1 10/23/18 83 141 1.58 — 2.95 < 1 < 1 Maximum 116 148 1.83 3.46 7 < 1 Minimum 83 129 1.48 2.62 < 1 < 1 Average 100 141 1.65 3.00 2.6 < 1.0 #Tests 4 4 _ 4 0 4 0 4 4 0 Site: ACMW-02N SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 1989 To: 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L • mg/L 89 7.1 5458.7 12.4 8.47 89.0 58 7.29 0.039 0.086 0.031 < 0.010 0.108 0.174 90 6.8 5458.6 12.1 8.99 106.0 60 17.98 0.035 0.097 0.021 < 0.010 0.082 0.189 91 7.0 5458.4 11.9 7.96 79.0 56 2.48 0.023 0.098 0.041 0.015 0.093 0.207 92 7.0 5458.4 11.6 7.40 71.0 48 0.57 0.020 0.099 0.037 0.012 0.091 0.202 93 6.3 5462.3 11.9 7.28 68.0 48 1.25 0.017 0.096 0.024 0.013 0.085 0.195 94 7.1 5458.3 11.7 6.92 70.0 53 1.01 0.022 0.092 0.025 0.013 0.071 0.174 95 6.2 5459.2 12.2 6.84 63.0 45 0.68 0.020 0.106 0.023 0.011 0.086 0.203 96 5.8 5459.6 12.8 6.64 64.0 48 1.50 0.016 0.102 0.028 0.011 0.093 0.206 97 6.8 5458.6 12.7 6.55 65.0 54 0.94 0.017 0.094 0.020 0.011 0.091 0.198 98 6.0 5459.4 12.0 6.48 63.0 48 1.75 0.020 0.114 < 0.020 < 0.010 0.113 0.239 99 6.2 5459.2 11.9 6.49 59.0 47 0.40 0.021 0.117 < 0.020 < 0.010 0.135 0.262 00 . 6.2 5459.2 12.3 6.71 59.0 45 0.71 0.017 0.122 0.025 < 0.010 0.091 0.167 01 7.0 5458.4 12.4 6.70 60.0 45 1.12 0.017 0.113 < 0.020 < 0.010 0.059 0.184 02 6.5 5458.9 11.8 6.67 58.0 42 1.31 . 0.016 0.116 < 0.010 0.084 0.209 03 6.8 5458.6 12.8 6.77 53.7 1.60 0.015 - 0.094 < 0.010 0.104 0.205 04 6.6 5458.8 11.4 6.86 54.6 29 0.81 0.018 0.128 < 0.020 < 0.010 0.057 0.195 05 . 7.0 5458.4 11.0 6.63 51.7 41 0.39 0.015 0.097 < 0.010 0.149 0.278 06 6.5 5458.9 12.0 6.67 53.5 41 0.99 0.017 0.240 < 0.010 0.135 0.385 07 7.5 5457.9 12.5 6.50 56.5 43 1.09 0.017 0.050 < 0.010 0.093 0.128 08 7.7 5457.7 12.2 6.60 56.0 39 1.16 0.024 0.060 < 0.018 0.150 0.193 09 8.0 5457.4 11.9 6.41 55.8 45 0.71 0.016 < 0.050 0.011 0.198 0.233 10 7.5 5457.9 11.6 6.51 54.0 44 0.97.. 0.022 0.056 < 0.010 0.194 0.232 11 8.6 5456.8 12.3 6.51 57.1 45 0.81 0.021 0.058 < 0.011 0.142 0.143 12 9.7 5460.0 12.2 6.64 62.9 0.026 < 0.047 0.023 < 0.010 0.148 0.202 13 10.4 5459.3 12.3 6.63 65.5 0.042 0.075 0.028 < 0.009 0.119 0.173 14 9.9 5459.8 _.12.6 6.61 60.2 0.024 0.055 0.026 < 0.011 0.235 0.246 15 11.3 5458.4 13.4 6.58 59.6 0.021 < 0.050 < 0.020 < 0.010 0.391 0.396 16 9.3 . 5460.4 13.6 6.59 62.6 0.026 0.093 < 0.020 < 0.015 1.938 1.959 17 6.6 5463.1 12.6 6.62 61.3 0.021 0.098 < 0.023 < 0.030 2.173 2.245 18 7.58 5462.1 13.1 6.49 62.8 0.027 0.080 < 0.023 < 0.015 1.137 1.116 Maximum 11.3 5463.1 13.6 8.99 106.0 60 17.98 0.042 0.240 0.041 0.030 2.173 2.245 Minimum 5.8 5456.8 11.0 6.41 51.7 29 0.39 0.015 0.047 < 0.020 < 0.009 0.057 0.128 Average 7.4 5459.1 12.2 6.86 63.4 47 2.07 0.022 0.093 0.025 0.012 0.288 0.371 #Tests 30 30 30 30 30 22 23 30 30 21 30 30 30 Site: ACMW-02N SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2018 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 89 130 231 5.9 5 9.73 < 2 < 2 90 113 195 4.9 < 5 6.56 5 < 2 < 2 91 113 165 4.8 < 5 5.40 < 5 < 2 < 2 92 99 157 3.5 < 5 5.09 < 5 < 2 < 2 93 100 145 2.4 8 4.94 < 5 3 < 2 < 2 94 100 150 2.9 < 5 4.72 < 4 < 2 < 2 95 90 135 2.3 5 4.29 5 2 2 96 95 136 2.5 2 3.11 5 1 1 97 97 147 6.8 2 4.83 5 1 1 98 95 141 3.5 < 5 3.32 < 5 1.4 < 1.1 99 90 134 3.2 < 5 2.77 < 5 3.6 2.4 2.0 00 90 129 2.8 < 5 3.15 < 5 - < 1.1 < 1.1 01 87 128 3.0 9 3.01 10 < 1.1 < 1.1 02 85 122 2.6 < 5 2.56 5 < 1.1 < 1.1 03 85 118 3.0 < 5 2.38 < 5 < 1.1 < 1.1 04 82 114 2.7 < 5 2.29 6 < 1.1 < 1.1 05 79 115 2.9 < 5 2.29 < 5 < 1.1 < 1.1 06 85 120 2.8 6 2.30 < 1.1 < 1.1 07 84 124 2.9 < 5 2.24 < 1.1 < 1.1 - 08 85 119 2.9 < 5 2.25 < 5 < 1.1 < 1.1 09 84 122 2.6 < 5 2.18 < 1.1 < 1.1 10 82 117 2.1 5 2.26 < 1.1 < 1.1 11 88 121 2.2 5 2.36 < 1.1 < 1.1 12 97 133 2.9 2.71 < 1.1 < 1.1 13 99 140 3.1 2.86 < 1.2 < 1.1 14 93 129 2.7 2.75 2.9 < 1.1 15 95 137 2.5 2.81 < 1.0 < 1.0 16 102 152 3.1 3.75 < 1.0 < 1.0 17 105 151 1.8 3.07 < 1.0 < 1.0 18 100 141 1.65 3.00 2.6 < 1.0 Maximum 130 231 6.8 9 9.73 10 3.6 2.4 2.0 Minimum 79 114 1.7 2 2.18 < 4 1.0 1.0 < 2.0 Average 94 139 3.1 5 3.50 5 1.5 1.3 2.0 #Tests 30 30 30 23 30 17 30 30 2 Site ACMW-02N Nitrate-Nitrogen and Water Level Chlorides • 5 - 5470 50 4 — 5465 40 3 -- 30 i5460E 2 — c� _ - 5455 w E 20 1 - - 0 - __ �� — 5450 10 ch .oO O O � 8 O cO O 8 O -1 - 5445 0 O M CO N. O M c0 I� O co L 03 O O O O O) O O O O O •'— —•—Nitrate —u—Water Level Linear(Nitrate) —+--Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 - 0.20 - 400 0.15 300 - J E 0.10 200 - 0.05 100 • +�.. • - p 0.00 00 G) 0) O) O) O) O O O O O •— •— CO 0) 0) O) 6) O) O O O O O v— —+—TDS Linear(TDS) --- --Total P Linear(Total P) Annual Metal Report ACMW-02N Access Gate Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 10/31/1988 11 3.5 5.1 28 <10 4200 <4 76 <0.1 <10 <20 3800 <0.2 550 7 <50 3 <1 16 11/28/1989 18.1 1.7 4.6 9.2 <10 <100 <10 <100 <1 <10 <50 580 <1 530 <10 <5 <50 8/1/1990 28 3.2 2.7 15 <10 180 <4 120 <0.1 <10 <20 280 <0.2 230 <1 <1 <10 8/21/1991 30 2.8 4.3 12 <10 89 <4 140 <0.1 <10 <20 180 <0.2 260 <1 <1 <10 7/21/1992 14 1.8 3.1 14 <10 <50 <4 76 <0.1 <10 <20 40 <0.2 120 <1 <1 <10 7/19/1994 15 1.3 3.6 13 <10 180 <2 61 <0.1 <10 <20 140 <0.2 110 <1 <1 <5 8/15/1995 13 1.4 3 12 <10 <50 <1 55 <0.1 <10 <10 <30 <0.2 15 <1 <1 <5 6/19/1996 14 1.4 3.5 12 <10 120 <1 58 <0.1 <10 <10 <30 <0.2 66 <1 <1 <5 6/16/1997 15 1.5 3.8 12 <10 100 <2 <50 <0.5 <10 <25 74 <0.5 72 <5 <5 <50 7/21/1998 14.5 1.21 3.28 10.7 <10 119 <2 <100 <0.5 <10 <20 56.4 <0.5 65.8 <2.5 <5 <25 6/20/1999 10.9 1.33 3.17 10.9 <10 96 <2 <100 <1 <0.1 <10 <20 <100 <0.2 59.4 <5 <2.5 <3 <1 -<1 <10 7/18/2000 6.01 3.07 1.61 24.9 <10 <2 <100 <20 92.8 <20 <2.5 <10 6/19/2001 11.6 1.22 3.56 9.99 <10 <2 <100 <20 <100 114 <2.5 <10 6/18/2002 11.0 1.38 2.69 10.2 <10 50 <2 43 <0.2 <0.2 <1 <20 <100 0.02 38.8 <1 <2.5 <1 <2 <0.2 <10 6/17/2003 9.37 1.23 3.01 9.11 <10 100 <2 41.4 <0.2 <0.2 <1 <20 <100 <0.01 56.1 <1 <2.5 <1 <2 <0.2 <10 5/18/2004 10.9 1.05 2.89 8.77 <10 30 <2 <100 <0.2 <0.2 <1 <20 <100 0.02 28.6 <1 <2.5 <1 <2 <0.2 <10 6/14/2005 10.1 0.968 2.7 8.18 <10 <2 <100 <20 <100 <20 <2.5 <10 6/1/2006 9.91 1.12 2.85 8.77 <10 60 <2 <2 <2 <2 <20 128 <0.2 62.9 <2 <2 <2.5 <2 <10 <1 <2 <10 6/19/2007 12.4 1.14 3.18 8.38 <10 49 <2 38 <1 <0.5 <1 <20 <50 <0.2 34.5 <2 <5 <2.5 <1 <5 <1 <3 <10 6/4/2008 12.3 1.19 3.13 8.73 <10 100 <2 48 <1 1.5 6.8 <20 86.5 -<0.2 91.2 6.5 <5 <2.5 3.5 <5 1.3 6.6 <10 6/17/2009 12.50 0.991 3.16 8.50 12.3 58 <2 41 <1 <0.5 <1 <20 <50 <0.2 43 <2 <5 <2.5 <1 <5 <1 <3 <10 6/9/2010 12.0 1.10 3.30 7.40 <0.5 260 <1 -39 <1 <0.5 <1 400 33 <0.2 65 <2 <5 <0.5 <1 <5 <1 <3 28 6/14/2011 12.0 1.13 3.48 9.17 <0.5 28.6 <1 37.6 <1 <0.5 <1 <2 <20 <0.2 27.9 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2012 <20 <1 49.3 <1 <0.1 <1 <0.2 <2 <5 <1 <5 <1 <3 6/18/2013 13.7 1.06 3.3 9.66 6/17/2014 13.3 1.23 3.54 8.76 <0.5 33.5 <1 38.9 <1 <0.5. <1 <2 <20 <0.2 8.63 <2 <5 <0.5 <1 <5 <1 <3 <20 7/15/2015 15.7 1.03 3.59 9.78 <0.5 87.6 <1 39.9 <1 <0.5 <1 <10 <20 <0.2 17.6 <2 <5 <0.5 <1 <5 <1 <3 <20 7/12/2016 13.0 1.02 3.68 7.91 <0.5 105 <1 41 <1 <0.5 <1 <2 19.8 <0.2 25 <2 <5 <0.5 <1 <5 <1 <3 <20 7/19/2017 14.6 1.04 4.42 7.66 <0.5 481 <1 40.9 <1 <0.5 <1 <2 46.7 <0.2 72.8 <2 <5 <0.5 <1 <5 <1 <3 <20 8/6/2018 15.1 <1 6.28 7.76 <0.5 1170 <1 47.3 <1 <0.5 <1 <2 70.4 <0.2 117 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-02S SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2017 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 01/09/18 10.55 5461.1 12.1 6.26 58.1 0.018 0.173 0.027 < 0.010 < 0.010 0.173 04/04/18 7.69 5463.9 11.8 6.24 60.8 0.027 < 0.070 < 0.020 < 0.010 1.010 0.957 08/06/18 6.58 5465.0 16.4 5.86 51.9 0.023 < 0.050 < 0.020 < 0.010 0.029 0.061 10/23/18 9.01 5462.6 15.9 6.41 53.2 0.041 0.051 < 0.020 < 0.010 0.010 0.061 Maximum 10.55 5465.0 16.4 6.41 60.8 0.041 0.173 0.027 < 0.010 1.010 0.957 Minimum 6.58 5461.1 11.8 5.86 51.9 0.018 < 0.050 < 0.020 < 0.010 < 0.010 0.061 Average 8.46 5463.1 14.1 6.19 56.0 0.027 0.086 0.022 < 0.010 0.265 0.313 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-02S SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 01/09/18 89 123 1.65 3.16 < 1 < 1 04/04/18 97 120 1.72 2.89 1 < 1 08/06/18 81 108 1.42 2.98 88.2 7.4 10/23/18 81 117 2.18 3.66 < 1 < 1 Maximum 97 123 2.18 3.66 88.2 r7.4 Minimum 81 108 1.42 2.89 < 1 < 1 s. Average 87 117 1.74 3.17 22.8 2.6 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-02S SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 1989 To: 2017 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level. C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 89 7.1 5460.5 11.7 6.70 - 58.0 38 5.11 0.028 0.088 0.030 < 0.015 0.193 0.267 , 90 7.0 5460.2 11.8 7.07 55.0 38 2.06 0.021 0.094 0.023 < 0.010 0.155 0.259 91 7.0 5460.2 12.2 7.01 56.0 41 0.57 0.020 0.098 0.036 0.010 0.219 0.328 92 6.9 5460.3 11.6 6.76 49.0 37 0.76 0.022 0.094 0.029 0.010 0.093 0.197 93 6.6 5460.5 1-1.4 6.86 57.0 42 1.83 0.022 0.098 0.024 0.011 0.079 0.188 94 7.4 5459.8 12.5 6.84 54.0 42 2.92 0.030 0.114 0.027 < 0.010 0.087 0.210 95 6.8 5460.5 12.0 6.57 51.0 36 0.98 0.030 0.118 0.054 0.010 0.101 0.228 96 6.0 5461.2 12.6 6.37 54.0 42 1.35 0.036 0.137 0.029 0.011 0.081 0.229 97 7.4 5459.8 12.5 6.50 50.0 40 1.25 0.018 0.098 0.021 0.011 0.103 0.213 98 6.3 5460.9 12.0 6.28 50.0 36 0.83 0.021 0.128 < 0.021 < 0.010 0.138 0.277 99 6.6 5460.6 12.3 6.34 47.0 35 0.62 0.017 0.141 < 0.020 < 0.010 0.042 0.193 00 6.5 5460.7 12.3 6.62 46.0 41 0.68 0.016 0.118 < 0.024 < 0.010 0.035 0.110 01 7.7 5459.5 12.5 6.57 47.0 38 1.28 0.014 0.111 0.021 < 0.010 0.018 0.145 02 6.6 5460.6 12.4 6.45 48.0 38 0.99 0.014 0.149 < 0:010 0.186 0.370 03 6.9 5460.3 12.3 6.66 43.1 2.35 0.015 0.103 < 0.010 0.077 0.153 04 6.6 5460.6 11.3 6.52 46.9 28 0.61 0.017 0.157 0.020 < 0.010 0.139 0.347 -05 7.3 5459.9 10.7 6.44 46.8 38 0.87 0.017 0.104 < 0.018 0.119 0.210 06 6.9 5460.3 12.5 6.34 47.2 36 1.82 0.016 0.309 < 0.010 0.123 0.444 07 8.1 5459.1 12.7 6.22 44.3 36 0.95 0.016 0.055 < 0.010 0.231 0.268 08 8.1 5459.1 11.9 6.34 46.0 39 1.02 0.018 0.058 < 0.010 0.341 0.375 09 8.4 5458.8 11.8 6.16 47.7 41 0.95 0.015 0.110 < 0.010 0.155 0.220 10 7.4 5459.8 11.7 6.33 45.4 37 0.78 0.021 0.078 < 0.010 0.096 0.145 11 9.6 5457.6 12.2 6.48 45.7 38 0.47 0.018 0.056 < 0.010 0.078 0.080 12 11.5 5460.1 12.2 6.54 46.4 0.021 0.059 0.023 < 0.010 0.201 0.263 13 12.4 5459.2 12.4 6.54 50.9 0.032 0.080 0.028 < 0.012 0.752 0.863 14 10.6 5461.0 13.0 6.29 38.9 0.024 0.058 0.025 < 0.012 1.565 1.185 15 12.4 5459.2 13.8 6.15 42.0 0.019 0.108 < 0.020 < 0.020 3.038 3.093 16 8.9 5462.7 13.9 6.18 41.5 J 0.025 0.073 < 0.020 < 0.038 2.333 2.210 17 6.3 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 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 6.15 38.9 28 0.47 0.014 0.055 < 0.020 < 0.010 0.018 0.080 Average 7.9 5460.5 12.3 6.48 48.5 38 : 1.35 0.021 0.106 0.026 0.012 0.394 0.474 #Tests 30 30 30 30 30 22 23 30 30 21 30 30 30 Site: ACMW-02S SOUTH TAHOE PUBLIC UTILITY DISTRICT ,PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2017 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 89 85 133 1.8 5 4.78 4 < 2 90 80 123 1.5 5 3.80 5 < 2 < 2 91 84 121 1.8 < 5 5.34 < 5 < 2 < 2 92 77 103 1.6 6 3.70 < 5 < 2 < 2 93 91 118 1.4 < 5 3.58 < 5 6 < 2 < 2 94 83 118 1.4 < 5 3.88 6 2 < 2 95 78 111 1.9 5 3.35 5 2 2 96 80 116 1.7 2 2.08 5 1.5 1.0 97 78 107 1.8 4 2.96 5 3.7 1.0 98 74 108 2.0 < 5 2.71 < 5 5.3 < 1.1 99 70 101 1.5 < 5 2.52 < 5 3.7 < 1.1 00 72 97 1.6 < 5 1.41 < 5 2.5 < 1.1 01 69 97 1.7 7 1.38 8 1.3 < 1.1 02 75 103 2.5 < 5 1.51 5 4.0 1.2 03 70 96 2.3 < 5 1.49 < 5 1.4 < 1.1 04 _ 76 101 2.7 < 5 1.41 7 3.1 < 1.1 05 73 101 2.4 < 5 1.85 5 < 1.1 < 1.1 06 77 105 2.2 < 5 1.38 < 1.2 < 1.1 07 73 102 2.6 6 1.75 2.9 1.2 08 75 101- 2.3 < 5 2.22 < 5 3.5 < 1.1 09 74 108 1.9 6 2.53 < 4.8 < 1.1 10 72 106 1.6 6 2.56 < 9.1 < 1.1 11 76 100 1.4 7 1.96 2.3 < 1.1 12 75 99 1.4 2.52 < 1.1 < 1.1 13 88 119 2.5 4.76 < 1.3 < 1.1 14 82 101 1.9 4.83 7.7 1.2 15 89 126 1.7 4.56 3.2 < 1.0 16 70 112 1.71 5.86 60.2 < 1.0 17 81 109 1.7 4.78 5.4 < 1.0 18 87 117 1.74 3.17 22.8 2.6 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 3.02 5 5.8 1.4 < 2 #Tests 30 30 30 23 30 17 30 30 1 Site AC MW-02S Nitrate-Nitrogen and Water Level Chlorides 5 - 5470 50 440 5465 3 $ - 5460 30 co2 - - — 5455 § 20 10 5450 •- � co u� � o� .- co � � rn .- M �n ti - �o rn rn cn a� o� 0 0 0 0 0 T .-1 - 5445 M ---Nitrate —II—Water Level Linear(Nitrate) t Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 0.20 400 0.15 300 J a) E 0.10 200 - 0.05 100 _ 0 0.00 O 1 n O MLO ts.. OLO . CO Cr, O O O O O O O O O - r —+—TDS Linear(TDS) t Total P Linear(Total P) Annual Metal Report ACMW-02S Access Gate Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 10/31/1988 9.7 2.1 3 9.9 <10 200 <4 30 <0.1 <10 <20 260 <0.2 190 6 <50 <1 <1 <10 11/28/1989 10.7 1.3 3.8 16 <10 <100 <10 <100 <1 <10 <50 <100 <1 <10 <10 <5 <50 8/1/1990 11 1.9 2.8 9.2 <10 <50 <4 57 <0.1 <10 <20 <30 <0.2 28 <1 <1 <10 8/21/1991 11 1.9 3 7.1 <10 <50 <4 53 <0.1 <10 <20 <30 <0.2 10 <1 <1 <10 7/21/1992 12 1.8 2.8 8.4 <10 <50 <4 55 <0.3 <10 <20 <0.2 <1 <1 <10 7/19/1994 13 1.8 3.2 7.1 <10 310 <2 69 0.1 <10 <20 320 <0.2 76 <1 <1 6 8/15/1995 12 1.8 2.9 6.8 <10 <50 <1 59 0.2 <10 <10 <30 <0.2 <5 <1 <1 <5 6/19/1996 12 1.8 2.8 6 <10 78 <1 54 <0.1 <10 <10 <30 <0.2 <5 <1 <1 <5 6/16/1997 9.7 1.8 2.4 6.5 <10 75 <2 <50 7.4 <10 <25 <50 <0.5 <10 <5 <5 <50 7/21/1998 11.1 1.77 2.36 6.31 <10 65 <2 <100 <0.5 <10 <20 63.9 <0.5 <20 <2.5 <5 <25 6/20/1999 7.93 1.70 3.43 5.73 <10 <50 <2 <100 <1 <0.1 <10 <20 <100 <0.2 <20 <5 <2.5 <3 <1 <1 <10 7/18/2000 8.28 1.76 2.37 6.06 <10 <2 <100 <20 89.6 <20 <2.5 <10 6/19/2001 9.14 1.61 2.06 5.15 <10 <2 <100 <20 <100 <20 <2.5 <10 6/18/2002 8.88 1.68 2.03 5.17 <10 20 <2 44 <0.2 <0.2 <1 <20 <100 0.02 <20 <1 <2.5 <1 <2 <0.2 <10 6/17/2003 9.58 1.44 2.53 5.57 <10 <10 <2 51.7 <0.2 <0.2 <1. <20 <100 <0.01 <20 <1 <2.5 <1 <2 <0.2 <10 5/18/2004 8.71 1.66 2.15 4.99 <10 20 <2 <100 <0.2 <0.2 <1 <20 <100 <0.01 <20 <1 <2.5 <1 <2 <0.2 <10 6/14/2005 9.02 1.40 2.02 4.97 <10 <2 <100 <20 <100 <20 <2.5 <10 6/1/2006 9.11 1.72 2.23 5.54 <10 50 <2 <2 <2 <2 <20 163 <0.2 <20 <2 <2 <2.5 <2 <10 <1 <2 <10 6/19/2007 10.1 1.73 2.20 5.54 <10 62 <2 46 <1 <0.5 <1 <20 112 <0.2 <2 <2 <5 <2.5 <1 <5 <1 <3 <10 6/4/2008 9.61 1.79 2.15 5.20 <10 78 <2 49 <1 <0.5 <1 <20 249 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/17/2009 10.5 1.75 2.42 5.67 15.4 39 <2 51 <1 <0.5 <1 <20 92.6 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 12.8 6/9/2010 10.0 1.70 2.40 5.20 <0.5 91 <1 46 <1 <0.5 <1 <2 62 <0.2 3 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2011 9.56 1.71 2.40 5.19 <0.5 43.9 <1 41.9 <1 <0.5 <1 <2 358 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2012 40.9 <1 43.2 <1 <0.5 <1 <0.2 <2 <5 <1 <5 <3 <3 6/18/2013 12.6 1.96 2.77 5.32 6/17/2014 7.08 1.63 1.80 4.39 <0.5 315 1.46 34.6 <1 <0.5 <1 <2 1080 <0.2 2.47 <2 <5 <0.5 <1 <5 <1 <3 <20 7/15/2015 12.1 1.70 2.67 5.10 <0.5 <20 <1 <2 <1 <0.5 <1 <10 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/12/2016 11.7 1.87 2.73 5.58 <0.5 279 <1 55.7 <1 <0.5 <1 <2 189 <0.2 2.14 <2 <5 1.66 <1 <5 <1 <3 <20 7/19/2017 11.2 1.83 2.56 6.18 <0.5 37 <1 49.9 <1 <0.5 <1 <2 36.2 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/6/2018 11.6 1.88 2.55 6.63 <0.5 22.5 <1 56.4 <1 <0.5 <1 <2 58.6 <0.2 5.74 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-04W SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 01/09/18 18.50 4901.4 12.4 6.10 46.7 0.033 < 0.150 0.035 < 0.030 1.86 1.73 04/04/18 14.62 4905.3 12.2 6.23 46.2 0.023 < 0.070 < 0.020 < 0.010 2.17 2.02 08/06/18 9.60 4910.3 13.0 6.28 44.1 0.021 < 0.050 < 0.020 < 0.010 2.18 2.17 10/23/18 16.21 4903.7 12.0 6.14 44.8 0.045 0.060 < 0.020 < 0.010 1.53 1.59 Maximum 18.50 4910.3 13.0 6.28 46.7 0.045 0.060 0.035 < 0.030 2.18 2.17 Minimum 9.60 4901.4 12.0 6.10 44.1 0.021 < 0.050 < 0.020 < 0.010 1.53 1.59 Average 14.73 4905.2 12.4 6.19 45.5 0.031 0.083 0.024 < 0.015 1.94 1.88 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-04W SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA , 2018 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 01/09/18 140 204 16.2 18.9 34.5 < 1 04/04/18 140 188 15.2 19.0 < 1 < 1 08/06/18 132 184 13.5 17.6 4.1 < 1 10/23/18 116 180 11.5 19.9 3.1 < 1 Maximum 140 204 16.2 19.9 34.5 < 1 Minimum 116 180 11.5 17.6 < 1 < 1 Average 132 189 14.1 18.85 10.7 < 1.0 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-04W SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 1989 To: 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 89 14.2 4901.7 11.3 6.10 34.0 77 61.58 0.163 0.127 0.028 < 0.010 0.82 0.958 90 14.0 4902.7 12.4 6.25 33.0 97 4.90 0.034 0.104 0.020 < 0.010 0.99 1.100 91 15.1 4900.8 12.3 6.37 33.0 98 7.20 --0.028 0.133 0.053 0.010 1.51 1.652 92_ 15.4 4900.5 11.9 6.24 34.0 96 3.10 0.038 0.118 0.026 0.012 1.74 1.868 93 12.2 4903.7 11.8 6.18 38.0 83 4.75 0.028 0.111 0.025 0.010 2.22 2.337 94 15.2 4900.7 12.2 6.23 40.0 76 1.27 0.069 0.121 0.033 0.011 3.55 3.676 95 12.9 4903.0 12.3 6.20 39.0 66 0.69 0.029 0.165 0.029 0.010 4.42 4.593 96 13.2 4902.7 12.5 6.11 43.0 62 3.08 ,0.028 0.181 0.021 0.013 3.03 3.219 97 11.9 4904.0 12.0 6.14 49.0 62 1.88 0.026 0.108 0.020 0.011 2.51 2.634 98 13.2 4902.7 12.0 5.82 53.0 52 5.30 0.027 0.203 < 0.024 < 0.010 3.20 3.416 99 13.4 4902.5 11.8 5.80 53.0 49 3.87 0.031 0.238 < 0.021 < 0.010 2.61 2.860 00 14.0 4901.9 11.6 6.23 52.0 47 1.75 0.018 0.118 0.021 < 0.011 2.65 2.721 01 14.2 4901.7 11.8 6.26 49.0 45 8.19 0.037 0.143 < 0.020 < 0.019 2.41 2.640 02 13.9 4902.0 12.0 6.15 46.0 47 4.46 0.024 0.343 < 0.019 2.29 2.651 03 13.8 4902.1 12.4 6.55 43.0 1.64 0.014 0.086 < 0.020 1.79 1.880 04 15.0 4900.9 11.3 6.21 44.2 29 0.33 0.019 0.133 < 0.020 < 0.020 1.70 1.862 05 14.7 4901.2 11.7 6.30 42.8 43 1.60 0.028 0.155 < 0.019 1.96 2.135 06 13.4 4902.5 12.2 6.15 39.6 42 1.55 0.015 0.138 < 0.049 5.31 5.086 07 15.7 4900.2 13.0 6.14 38.6 41 0.91 0.015 0.064 < 0.083 ' 7.46 7.570 08 16.4 4899.5 12.2 6.24 42.8 33 3.90 0.021 0.057 < 0.064 5.49 5.573 09 15.1 4900.8 11.9 5.97 44.5 47 1.43 0.015 < 0.050 < 0.051 4.43 4.505 10 14.3 4901.6 12.6 6.10 48.6 43 1.07 0.020 < 0.050 < 0.040 3.57 3.636 11 12.9 4903.0 11.5 6.08 48.7 38 0.81 0.022 < 0.066 < 0.028 2.40 2.364 12 15.3 4904.6 12.3 5.99 47.4 0.021 < 0.093 0.023 < 0.028 2.34 2.508 13 15.3 4904.6 12.4 6.02 42.9 0.043 0.113 0.029 ' < 0.023 2.53 2.557 14 15.0 4904.9 11.8 6.18 40.1 0.018 0.100 0.029 < 0.019 1.90 1.920 15 17.2 4902.7 12.5 6.05 39.6 0.017 0.053 < 0.020 < 0.020 1.80 1.830 16 17.0 4902.9 12.7 6.04 40.0 . 0.022 0.105 < 0.020 < 0.035 1.72 1.813 17 12.5 4907.4 12.4 6.21 42.2 0.028 0.110 0.030 < 0.028 1.59 1.678 18 14.73 4905.2 12.4 6.19 45.5 0.031 0.083 0.024 < 0.015 1.94 1.88 Maximum 17.2 4907.4 13.0 6.55 53.0 98 61.58 0.163 0.343 0.053 0.083 7.46 7.570 Minimum 11.9 4899.5 11.3 5.80 33.0 29 0.33 0.014 0.050 < 0.020 < 0.010 0.82 0.958 Average 14.4 4902.5 12.1 6.15 42.9 58 5.45 0.031 0.122 0.026 0.024 2.73 2.837 #Tests 30 30 30 30 30 ' 22 23 30 30 21 30 30 30 Site: ACMW-04W SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2018 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 89 244 310 52.2 5 18.65 9 < 2 90 230 329 53.1 6 29.30 < 5 2 < 2 91 222 313 50.5 < 5 31.42 < 5 2 < 2 92 222 311 49.5 7 32.04 < 5 4 < 2 93 204 301 37.6 6 29.75 < 5 7 < 2 < 2 94 181 271 29.3 < 5 25.85 7 12 < 2 95 176 268 29.9 5 22.95 5 6 2 96 163 240 24.4 3 19.95 5 18.1 1.1 97 -= 151 220 20.1 2 15.30 5 7.8 3.6 98 144 211 14.3 < 5 13.95 < 5 15.1 < 1.1 99 135 199 12.4 6 10.45 < 5 7.4 < 1.1 00 134 192 13.8 5 8.84 < 5 3.9 1.1 01 131 192 18.3 6 7.50 < 5 1.2 < 1.1 02 139 207 25.4 16 6.93 10 5.1 < 1.1 03 136 199 25.1 < 5 8.60 5 9.3 < 3.1 04 134 193 22.1 < 5 9.62 6 3.9 < 1.1 05 135 183 23.1 < 5 9.94 < 5 1.8 < 1.1 06 143 212 19.0 < 5 9.75 < 1.1 < 1.1 07 146 213 12.6 < 5 10.20 15.7 < 2.9 08 137 181 13.5 < 5 9.70 5 7.4 < 1.1 09__ 147 233 22.9 6 8.46 1.5 < 1.1 10 145 215 21.3 < 5 7.96 6.3 < 1.1 11 138 196 17.0 <__ 5 7.99 8.5 1.6 12 129 180 12.7 9.77 11.2 < 1.1 13 132 183 13.9 13.42 7.2 < 1.1 14 129 185 14.2 17.46 5.0 < 1.1 15 138 202 16.4 20.05 78.3 < 1.0 16 142 215 21-.2 18.25 6.8 < 1.0 17 140 211 20.4 16.15 362.0 < 1.0 18 132 189 14.1 18.85 10.7 < 1.0 Maximum 244 329 53.1 16 32.04 10 362.0 3.6 < 2 Minimum 129 180 12.4 - 2 6.93 < 5 1.1 < 1.0 < 2 Average 156 225 24.0 6 15.64 5 21.2 1.5 . < 2 #Tests 30 30 30 23 30 17 30 30 1 Site AC MW-04W • Nitrate-Nitrogen and Water Level Chlorides 10 - 4910 100 9 = 4908 90 8 = 4906 80 7 _ 4904 $ 70 6 - 4902 Ti; 60 'a)54900 3 o, 50 :'��► E - L E 4 _ � 4898 2 40 3 _ -- 4896 30 '•� 2 _ WNIF 4894 20-` 1111111%pINV -- —� — 1 I. 4892 10 0)I 0) 0n N. 0)I 0)I 0n N.. 0) CO LTD N- 0- , , I , co co O) O) O) O 0 0 0 O O s- '- r O •- CO f) N-0 0) i- M I c1') 1� O e- CO I U)I f� CO O O O O O O O O O O •- e- -�Nitrate Water Level Linear(Nitrate) -0-Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 �_ _ 0.50 -- 400 0.40 300 0.30 a) 200 0.20 100 - 0.10 0 - r I I r I I I r I I 1 - 1 I , 0.00 - . . , r I 1 I I i I SCO LO N O I e CO r� f` O �I �I O r , ' I I , CO O O O O O O O O O O e- CO O - O CO O O O O O O O a-- c- s- 1- -�TDS Linear(TDS) Total P Linear(Total P) Annual Metal Report ACMW-04W Gansberg Ca K Mg Na Ag Al As Ba Be Cd Cr. Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 10/31/1988 20 3.8 5.4 12 <10 1300 <4 120 <0.1 <10 <20 790 <0.2 430 <5 <50 1 <1 <10 11/28/1989 31.4 4 7.7 40.6 <10 130 <10 220 <1 <10 <50 140 <1 17 <10 <5 <50 8/1/1990 27 4.2 6 16 <10 170 <4 180 <0.1 <10 <20 120 <0.2 13 <1 <1 <10 8/21/1991 25 4.2 6.3 15 <10 <50 <4 160 <0.1 <10 <20 <30 <0.2 <10 <1 <1 <10 7/21/1992 30 4.4 6.5. 20 <10 230 <4 190 0.1 <10 <20 340 <0.2 14 <1 <1 <10 7/12/1994 22 3.7 4.8 20 <10 350 <2 140 <0.1 <10 <20 290 <0.2 6.5 <1 <1 <5.. 8/15/1995 21 3.8 4.7 20 <10 51 <1 150 0.1 <10 <10 <30 <0.2 <5 <1 <1 <5 6/19/1996 19 3.5 4.3 19 <10 95 1 140 <0.1 <10 <10 <30 <0.2 <5 <1 <1 <5 6/16/1997 17 4.2 4 20 <10 67 <2 120 <0.5 <10 <25 83 <0.5 <10 <5 <5 <50 7/21/1998 16.1 3.35 3.36 19.4 <10 133 <2 <100 <0.5 <10 <20 73.9 <0.5 <20 <2.5 <5 <25 6/20/1999 11.4 3.16 2.02 17.7 <10 82 <2 <100 <1 <0.1 <10 <20 <100 <0.2 <20 <5 <2.5 <3 2 <1 10.2 7/18/2000 9.41 3.03 2.73 17.9 <10 <2 122 <20 119 <20 <2.5 <10 6/19/2001 12.9 3.13 2.82 19.7 <10 <2 <100 <20 ,<100 <20 <2.5 <10 6/18/2002 13.7 3.6 2.92 22.4 <10 <10 <2 98 <0.2 <0.2 <1 <20 <100 0.02 <20 <1 <2.5 <1 <2 <0.2 <10 6/17/2003 11.5 2.84 2.83 21.8 <10 <10 <2 106 <0.2 <0.2 <1 <20 <100 <0.01 <20 <1 <2.5 <1 <2 <0.2 <10 5/18/2004 10.9 2.95 2.60 20.0 <10 <10 <2 <100 <0.2 <0.2 <1 <20 <100 <0.01 <20 <1 <2.5 <1 <2 <0.2 <10 6/14/2005 11.0 2.87 2.55 19.3 <10 <2 <100 <20 <100 <20 <2.5 <10 6/1/2006 12.5 3 2.47 19.7 <10 <50 <2 <2, 27 <2 <20 <100 <0.2 <20 <2 <2 <2.5 <2 <10 <1 <2 10.2 6/19/2007 12.1 3.11 2.55 22.8 <10 21 <2 85 <1 <0.5 <1 <20 <50 <0.2 <20 <2 <5 <2.5 <2 <5 <1 <3 <10 6/4/2008 10.7 3.15 2.25 20.8 <10 42 <2 110 <1 <0.5 . <1 . <20 66 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/18/2009 12.9 3.37 2.96 23.1 13.7 33 <2 100 <1 <0.5 <1 <20 94.2 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 15.1 6/9/2010 14.0 3.10 3.10 24.0 <0.5 <20 <1 100 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2011 12.4 3.14 2.98. 25.2 <0.5 45.4 <1 92.8 <1 <0.5 <1 <2 464 <0.2 2.01 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2012 <20 <1 81.5 <1 <0.5 <1 <0.2 <2 <5 <1 <5 <1 <3 6/18/2013 9.6 2.8 1.90 21.8 6/17/2014 10.6 2.92 2.44 24.2 <0.5 <20 <1 78.9 <1 <0.5 <1 <2 . <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/15/2015 9.3 2.64 2.18 21.9 <0.5 <20 <1 85.5 <1 . <0.5 <1 <10 26.4 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/12/2016 11.2 2.91 2.66 24.9 <0.5 <20 <1 91.6 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/19/2017 12.7 3.27 2.81 25.1 <0.5 <20 <1 95.1 <1 <0.5 <1 <2 39.3 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/2/2018 10.1 2.66 2.24 23.4 <0.5 <20 <1 81.3 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-06S SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 01/09/18 15.19 5208.3 12..6 7.36 225 0.098 0.181 0.028 < 0.020 0.022 0.203 04/04/18 15.35 5208.2 13.4 7.47 205 0.098 0.106 < 0.020 < 0.010 0.084 0.190 08/06/18 16.21 5207.3 14.4 7.28 210 0.074 0.115 < 0.020 < 0.050 0.043 0.158 10/23/18 15.90 5207.6 12.6 7.58 224 0.116 0.096 < 0.020 < 0.010 0.028 0.124 Maximum 16.21 5208.3 14.4 7.58 225 0.116 0.181 0.028 < 0.050 0.084 0.203 Minimum 15.19 5207.3 12.6 7.28 205 0.074 0.096 < 0.020 < 0.010 0.022 0.124 Average 15.66 5207.8 13.3 7.42 216 0.097 0.125 0.022 < 0.023 0.044 0.169 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-06S SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Total Fecal/ Fecal TDS ' EC Chloride COD SO4 Color Coli E.coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 01/09/18 385 646 53.0 25.1 1 < 1 04/04/18 368 526 59.8 25.6 - < 1 < 1 08/06/18 364 602 57.4 26.2 13.4 < 1 10/23/18 383 644 54.8 - 26.2 < 1 < 1 Maximum 385 646 59.8 26.2 13.4 < 1 Minimum 364 526 53.0 25.1 < 1 < 1 Average 375 605 56.3 - 25.8 4.1 < 1.0 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-06S SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 1989 To: 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 89 14.8 5205.9 11.9 9.29 209 170 29.13 0.060 0.253 0.119 < 0.010 0.028 0.292 90 14.9 5205.9 12.7 8.12 207 276 12.33 0.069 0.152 0.028 0.010 0.065 0.227 91 14.5 5206.2 12.2 8.20 207 136 34.00 0.064 0.413 0.169 0.015 0.066 0.494 92 14.9 5205.8 12.1 ,8.57 195 344 2.30 0.049 0.288 0.068 0.012 0.066 0.366 93 - 14.6 5206.1 12.0 8.84 196 226 16.60 0.039 0.342 0.129 0.015 0.075 0.433 94 14.9 5205.8 12.1 9.00 182 230 19.07 0.056 0.347 0.092 0.017 0.068 0.433 95 15.9 5204.8 12.3 7.83 228 270 0.89 0.055 0.250 0.076 0.011 0.079 0.340 96 14.9 5205.8 12.5 8.55 243 299 12.10 0.056 0.647 0.231 0.017 0.035 0.699 97 14.7 5206.0 12.0 8.79 201 228 18.23 0.070 1.404 0.410 0.031 0.044 1.479 98 15.6 5205.1 11.3 9.36 175 163 29.30 0.037 0.506 0.181 0.032 0.049 0.589 99 15.9 5204.8 11.6 7.84 258 302 0.96 0.091 0.358 0.097 0.025 01061 0.444 00 16.1 5204.6 11.5 7.04 253 330 0.80 0.048 0.176 0.047 0.020 0.021 0.137 01 16.4 5204.3 12.2 6.98 250 259 1.28 0.041 0.237 0.021 0.023 0.042 0.324 02 15.9 5204.8 11.8 7.90 225 181 26.02 0.041 0.297 0.014 0.050 0.365 03 15.5 5205.2 12.5 7.87 203 9.55 0.027 0.209 0.024 -0.067 0.290 04 15.9 5204.8 11.9 7.78 194 152 9.43 0.037 0.236 0.108 0.072 0.074 0.372 05 15.5 5205.3 11.5 7.97 186 191 6.26 0.050 0.303 0.035 0.079 0.421 06 15.6 5205.1 12.2 7.52 205 244 0.65 0.045 0.210 0.039 0.065 0.303 07 16.1 5204.6 12.8 7.96 179 152 6.30 0.031 0.192 0.064 0.078 0.239 08 15.7 5205.0 12.6 7.74 215 256 1.04 0.056 0.223 0.059 0.050 0.201 09 15.5 5205.2 11.6 7.32 203 221 4.53 0.038 0.232 0.034 0.074 0.224 10 15.7 5205.0 12.0 8.13 186 166 13.30 0.048 0.270 0.022 0.060 0.217 11 15.2 5205.5 11.6 8.21 169 254 1.16 0.044 0.150 0.022 0.078 0.226 12 15.7 5207.8 12.4 8.00 190 0.054 0.162 0.059 0.029 0.058 0.239 13 15.6 5207.9 12.7 7.20 227 0.090 0.182 0.041 0.016 0.044 0.216 14 15.8 5207.7 12.3 7.59 229 0.074 0.094 0.029 0.015 0.034 0.114 15 16.2 5207.3 12.5 8.07 191 0.032 0.140 0.037 < 0.010 0.092 0.232 16 16.1 5207.4 12.9 8.51 167 0.035 0.142 0.060 < 0.018 0.105 0.260 17 15.5 5208.0 13.5 7.20 205 0.081 0.117 0.026 < 0.020 0.039 0.148 18 15.66 5207.8 13.3 7.42 216 0.097 0.125 0.022 < 0.023 0.044 0.169 Maximum 16.4 5208.0 13.5 9.36 258 344 34.00 0.097 1.404 0.410 0.072 0.105 1.479 Minimum 14.5 5204.3 11.3 6.98 167 136 0.65 0.027 0.094 0.021 < 0.010 0.021 0.114 Average 15.5 5205.9 12.2 8.03 206 230 11.10 0.054 0.288 0.098 0.025 0.060 0.350 #Tests 30 30 30 30 30 22 23 30 30 21 30 30 30 Site: ACMW-06S SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2018 Total Fecal-/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 89 359 666 70.3 6 37.1 < 2 < 2 90 422 673 75.9 6 33.1 < 5 9 4 91 408 654 86.4 < 5 22.4 5 8 3 92 424 705 90.7 < 5 25.2 13 3 < 2 93 401 679 86.1 7 24.8 < 5 6 < 2 < 2 94 368 643 93.4 5 25.4 < 4 4 2 95 430 719 92.5 5 28.0 8 3 2 96 437 667 85.9 17 29.0 5 12.1 7 97 368 568 77.6 10 25.2 8 12.6 2.8 98 315 555 76.8 6 25.0 < 5 17.6 2.6 99 415 680 76.6 < 5 46.3 5 5.8 < 1.1 00 454 741 74.9 < 5 32.8 < 5 < 1.1 < 1.1 01 440 722 72.8 7 30.5 < 5 < 1.1 < 1.1 02 393 640 69.2 6 27.1 10 < 1:1 < 1.1 03 381 639 69.3 < 5 26.5 < 5 < 1.1 < 1.1 04 - 377 572 67.8 6 26.1 8 2.9 < 1.1 05 358 542 68.9 < 5 25.8 5 1.9 < 1.1 06 382 638 63.5 < 9 25.7 1.3 < 1.1 07 356 604 61.4 5 25.1 < 1.1 < 1.1 08 378 625 62.0 6 25.8 12 1.2 < 1.1 09 366 578 61.0 < 5 24.7 < 1.1 < 1.1 10 351 574 60.3 6 23.0 - 1.4 < 1.1 11 336 570 61.2 8 22.4 8.7 < 1.1 12 366 598 59.6 23.7 1.3 < 1.1 13 380 617 56.8 25.2 5.1 < 1.1 14 387 642 58.2 26.8 1.7 < 1.1 15 355 592 60.7 28.6 - 7.4 < 1.0 16 330 541 62.0 31.6 1.0 < 1.0 17 353 622 56.5 26.3 1.0 < 1.0 18 375 605 56.3 25.8 4.1 < 1.0 Maximum 454 741 93.4 17 46.3 13 17.6 7.0 < 2 Minimum 315 541 56.3 < 5 22.4 < 4 < 1.0 < 1.0 < 2 Average 382 629 70.5 7 27.5 7 4.3 - 1.7 < 2 #Tests 30 30 30 23 30 17 30 30 1 Site A Nitrate-Nitrogen &Water Level Chlorides 5 - - 5210 2007 180 4 EE 160 140 3 120 -_ a) _ 'a 1 2 80 - 60 - 1 - 5202 .40 -- _ 20 -- 0 • • r• • • 4- • +� ♦ . ♦, • ..+♦� 5200 p - i � r ,• w r- N) in N- d) N) N) N- d) r M Lc) ti O CC, N- O a- M Ln N- OD O) W 0) O) O) O O O 0 0 r- r- CO O O O O O O O O O O —•--Nitrate -}Water Level Linear(Nitrate) --+--Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 1000 0.4 - 900 = 800 - 0.3 - 700 600 - _ J - - E 500 _ E 0.2 400 = 300 200 0.1 100 = = -a--- 11111, O r ' O r r M r LO O r Ch i N O a- M in O r M O M LC)r f� CO O O -O O O O O O O O CO O O O O) O O O O O O �—TDS Linear(TDS) Total P Linear(Total P) Annual Metal Report ACMW-06S Cello Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 11/2/1988 56 10 25 46 <10 1100 <4 77 <0.1 <10 <20 1900 <0.2 590 14 <50 2 <1 13 11/28/1989 103 10.1 15.4 39.8 <10 <100 <10 390 <1 <10 <50 <100 <1 250 <10 <5 <50 8/1/1990 72 8.2 28 37 <10 <50 <4 160 <0.1 <10 <20 <30 <0.2 47 <1 <1 <10 8/21/1991 76 8.2 33 37 <10 230 <4 250 0.1 <10 <20 190 <0.2 200 1 <1 <10 7/21/1992 78 8.2 16 41 <10. <50 <4 200 <0.1 <10 <20 33 <0.2 54 <1 <1 <10 7/19/1994 75 8.3 17 50 <10 440 <2 200 0.7 <10 <20 230 <0.2 140 <1 <1 8 8/15/1995 96 7.6 30 44 <10 87 1.4 290 <0.1 <10 <10 58 <0.2 280 <1 <1 <5 6/19/1996 81 9.1 32 52 <10 74 1 36 0.2 <10 <10 2400 <0.2 360 <1 <1 <5 6/16/1997 81 9 18 40 <10 46 <2 190 <0.5 <10 <25 <50 <0.5 73 <5 <5 <50 7/21/1998 60 8.03 12.5 40.1 <10 <25 6 190 <0.5 <10 <20 <30 <0.5 <20 <2.5 <5 26.3 6/20/1999 63.6 8.12 17.2 41.0 <10 66 <2 216 <1 <0.1 <10 <20 <100 <0.2 123 <5 <2.5 <3 <1 <1 <10 6/19/2001 35.5 7.47 26.0 38.3 <10 <2 115 <20 <100 74 <2.5 <10 6/18/2002 58.1 7.4 15.7 37.0 <10 50 <2 170 <0.2 <0.2 3 <20 <100 0.02 <20 2 <2.5 <1 <2 <0.2 <10 6/17/2003 56.6 6.48 12.6 39.5 <10 160 <2 139 <0.2 <0.2 3 <20 134 <0.01 345 3 <2.5 <1 <2 <0.2 <10 5/18/2004 83.4 6.88 14.6 35.6 <10 240 <2 173 <0.2 <0.2 3 <20 156 0.03 140 2 <2.5 <1 <2 <0.2 <10 6/14/2005 58.3 7.08 13.2 34.0 <10 <2 <100 <20 935 311 <2.5 <10 6/1/2006 58.0 7.08 23.5 33.8 <10 <50 <2 <2 <2 <2 <20 <100 <0.2 <20 2 3 <2.5 <2 <10 <1 <2 <10 6/19/2007 63.8 7.21 25.1 32.8 <10 <20 3.45 200 <1 <0.5 <1 <20 106 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/4/2008 69.1 7.92 24.5 33.8 <10 48 2.54 210 <1 <0.5 <1 <20 127 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/17/2009 64.3 7.71 15.7 34.3 14.2 970 2.39 150 <1 <0.5 <1 <20 1030 <0.2 115 8.1 <5 <2.5 <1 <5 <1 <3 13.7 6/9/2010 62.0 6.90 17.0 35.0 <0.5 200 <1 150 <1 <0.5 <1 2.2 <20 <0.2 35 5.7 <5 <0.5 <1 <5 <1 <3 <20 6/14/2011 57.9 7.25 11.3 36.7 <0.5 263 <1 100 <1 <0.5 1.1 <2 <20 <0.2 8.46 7.83 <5 <0.5 <1 <5 <1 <3 <20 6/14/2012 408 2.72 193 <1 <0.5 <1 <0.2 2.51 <5 <1 <5 <1 <3 6/18/2013 57.9 6.92 18.7 32.0 6/17/2014 60.8 6.78 22.3 31.8 <0.5 85 1.96 172 <1 <0.5 <1 2.29 <20 <0.2 5.82 2.26 <5 <0.5 <1 <5 <1 <3 <20 7/15/2015 44.7 6.72 12.6 31.6 <0.5 137 <1 148 <1 <0.5 <1 <10 <20 <0.2 9.76 5.01 <5 <0.5 <1 <5 <1 <3 <20 7/12/2016 52.3 6.58 21.8 30.3 <0.5 20.8 1.16 159 <1 <0.5 <1 <2 <20 <0.2 181 2.64 <5 <0.5 <1 <5 <1 <3 <20 7/19/2017 57.3 6.92 22.7 32.3 <0.5 33.1 1.29 151 <1 <0.5 <1 <2 <20 <0.2 11.7 <2 <5 <0.5 <1 <5 <1 <3 <20 8/6/2018 60.5 6.94 23.0 30.9 <0.5 22.5 1.5 166 <1 1.29 <1 2.3 129 <0.2 16.5 <2 13.7 <0.5 <1 <5 <1 <3 <20 Site: ACMW-20 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 3/13/2018 15.33 5074.97 10.7 6.01 33.7 0.066 0.110 < 0.020 < 0.010 0.591 0.591 4/25/2018 12.75 5077.55 10.3 6.28 32.7 0.057 0.340 < 0.020 < 0.010 1.620 1.530 8/29/2018 11.55 5078.75 15.5 5.98 35.2 0.071 < 0.100 < 0.020 < 0.010 0.215 0.339 11/20/2018 15.48 5074.82 14.5 6.06 34.8 0.063 < 0.100 < 0.020 < 0.020 0.440 0.496 Maximum 15.48 5078.75 15.5 6.28 35.2 0.071 0.340 0.020 < 0.020 1.620 1.530 Minimum 11.55 5074.82 10.3 5.98 32.7 0.057 < 0.100 < 0.020 < 0.010 0.215 0.339 Average 13.78 5076.52 12.8 6.08 34.1 0.064 0.163 0.020 < 0.013 0.717 0.739 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-20 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 3/13/2018 84 82.0 1.80 2.79 < 1 < 1 4/25/2018 70 92.0 1.50 3.11 < 1 < 1 8/29/2018 67 85.6 1.18 2.10 < 1 < 1 11/20/2018 75 87.1 2.61 3.83 < 1 < 1 Maximum 84 92 2.61 3.83 < 1 < 1 Minimum 67 82 1.18 2.1 < 1 < 1 Average 74 86.7 1.77 2.96 < 1.0 < 1.0 #Tests 4 4 4 0 4 0 4 4 0 i Site: ACMW-20 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 10.9 5079.4 11.5 6.11 33.4 1.20 0.054 0.073 0.025 < 0.010 0.516 0.599 13 10.6 5079.7 11.6 6.20 31.4 0.085 0.051 0.026 < 0.013 0.623 0.856 14 12.7 5077.6 12.2 6.31 29.7 0.066 0.065 0.025 < 0.013 0.946 1.334 15 13.2 5077.1 12.8 6.17 31.5 0.066 0.057 0.020 0.011 0.512 0.561 16 11.6 5078.8 13.1 6.15 30.9 0.058 0.375 < 0.020 < 0.063 5.344 5.626 17 9.3 5081.0 • 11.7 6.16 30.3 0.063 0.163 0.021 < 0.020 2.943 3.066 18 13.8 5076.5 12.8 6.08 34.1 0.064 0.163 0.020 < 0.013 0.717 0.739 Maximum 13.8 5081.0 13.1 6.31 34.1 1.20 0.085 0.375 0.026 0.063 - 5.344 5.626 Minimum 9.3 5076.5 11.5 6.08 29.7 1.20 0.054 0.051 0.020 0.010 0.512 0.561 Average 11.7 5078.6 12.2 6.17 31.6 1.20 0.065 0.135 0.022 0.020 1.657 1.826 #Tests 7 7 7 7 7 0 1 7 7 7 7 7 7 Site: ACMW-20 SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 2012 To: 2018 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli - Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 67 78 1.32 2.20 1 < 1 13 70 78 1.62 2.42 1 < 1 14 66 77 1.65 2.27 1 < 1 15 67 85 2.02 2.96 32 < 1 16 107 130 2.65 3.72 6 < 1 17 97 108 3.03 4.61 10 < 1 18 74 87 1.77 2.96 < , 1 < 1 Maximum 107 130 3.03 4.61 32 1 Minimum 66 77 1.32 2.20 1 < 1 Average 78 92 2.01 3.02 8 1 #Tests 7 7 7 0 7 0 7 7 0 J Site ACMW-20 . Nitrate-Nitrogen &Water Level Chlorides 20 - 5088 50 16 5084 40 125080 ai 30. -8, a ''' \. _ CD J C) E 8 5076 ) E 20 4 -- 5072 10 1 p 5068 0 , 12 13 14 15 16 17 18 12 13 14 15 16 17 18 —♦—Nitrate --Water Level Linear(Nitrate) t Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 - 0.50 - 400 0.40 300 _ 0.30 _ J J C) - C) - E - E - 200 0.20 100 -- 0.10 0 , , 0.00 12 13 14 15 16 17 18 12 13 14 15 16 17 18 -t-TDS t Total P Annual Metal Report ACMW-20 Diamond Valley Rd - Paynesville Ca K Mg Na Ag Al As Ba Be 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 6/20/2012 8.73 2.27 1.87 5.05 <10 62.3 <1 21.7 <1 <0.5 <1 <20 6/11/2013 5.50 1.83 1.22 3.84 7/8/2014 6.55 2.04 1.62 4.34 <0.5 103 1.54 19.9 <1 <0.5 <1 2.32 8/18/2015 8.28 2.5 2.11 5.25 <0.5 61.6 <1 22.4 <1 <0.5 <1 <2 7/27/2016 8.20 2.21 2.04 5.24 <0.5 41.6 <1 20.9 <1 <0.5 <1 <2 8/16/2017 5.85 1.58 1.32 4.70 <0.5 466 <1 18.4 <1 <0.5 <1 <2 8/29/2018 7.61 1.94 1.87 5.19 <0.5 68.8 <1 21.9 <1 <1 <1 <2 Fe Hg Mn Mo Ni Pb Sb Se 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 6/20/2012 113 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/11/2013 7/8/2014 502 <0.2 3.41 <2 <5 <0.5 <1 <5 <1 <3 <20 8/18/2015 91.6 <0.2 <2 2.11 <5 <0.5 <1 <5 <1 <3 <20 7/27/2016 33.7 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/16/2017 488 <0.2 3.59 1.96 <5 <0.5 <1 <5 <1 3.3 <20 8/29/2018 65.6 <0.2 <2 1.99 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-21 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 01/23/2018 17.91 4993.42 10.9 6.12 39.1 0.069 < 0.100 < 0.020 < 0.030 0.841 2.740 06/19/2018 7.49 5003.84 10.2 5.90 32.3 0.066 _ 0.090 < 0.020 < 0.010 1.340 1.360 08/14/2018 10.95 5000.38 11.0 5.92 39.4 0.063 < 0.050 < 0.020 < 0.010 2.410 0.735 10/25/2018 14.90 4996.43 10.7 5.93 34.0 0.051 0.620 < 0.020 < 0.010 7.290 4.270 Maximum 17.91 5003.84 11.0 6.12 39.4 0.069 0.620 0.020 < 0.030 7.290 ' 4.270 Minimum 7.49 4993.42 10.2 5.90 32.3 0.051 < 0.050 < 0.020 < 0.010 0.841 0.735 Average 12.81 4998.52 10.7 5.97 36.2 0.062 0.215 0.020 < 0.015 2:970 2.276 #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 2018 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 01/23/2018 92 108 4.80 3.08 < 1 < 1 06/19/2018 66 103 5.40 2.19 2 < 1 08/14/2018 112 178 19.00 4.39 28.2 1 10/25/2018 199 288 39.60 7.56 < 1 < 1 Maximum 199 288 39.60 7.56 28.2 1 Minimum 66 103 4.80 2.19 < 1 < 1 Average 117 169 17.20 4.31 8.1 1.0 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-21 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 13.4 4997.9 10.4 6.13 37.4 2.30 0.031 0.113 0.024 < 0.022 2.065 2.201 13 14.9 4997.0 10.1 6.29 34.2 0.047 0.099 0.025 < 0.016 1.003 1.124 14 13.3 4998.0 9.2 6.45 38.1 0.042 0.124 0.021 < 0.013 1.033 1.491 15 17.7 4993.6 10.1 6.30 41.5 0.053 0.081 < 0.020 0.018 1.320 1.391 16 13.7 4997.6 10.9 6.29 38.1 0.063 < 0.063 < 0.020 < 0.015 0.865 0.860 17 9.9 5001.4 10.6 6.14 39.6 0.066 0.094 0.021 < 0.015 2.283 2.276 18 12.8 4998.5 10.7 5.97 36.2 0.062 0.215 0.020 < 0.015 2.970 2.276 Maximum 17.7 5001.4 10.9 6.45 41.5 2.30 0.066 0.215 0.025 0.022 2.970. 2.276 Minimum 9.9 4993.6 9.2 5.97 34.2 2.30 0.031 0.063 0.020 0.013 0.865 0.860 Average 13.7 4997.7 10.3 6.22 37.9 2.30 0.052 0.113 0.021 0.016 1.649 1.660 #Tests 7 7 7 7 7 0 1 7 7 7 7 7 7 Site: ACMW-21 SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 2012 To: 2018 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 99 143 12.1 5.76 6 < 1 13 83 114 8.2 4.16 1 < 1 14 84 119 7.6 _ 4.06 1 < 1 15 96 135 7.4 4.94 < 1 < 1 16 83 113 5.9 3.88 < 1 < 1 17 110 156 13.9 4.01 2 1 18 117 169 17.2 4.31 8 1 Maximum 117 169 17.2 5.76 8 1 Minimum 83 • 113 5.9 3.88 1 < 1 Average 96 136 10.3 4.45 3 1 #Tests 7 7 7 0 7 0 7 7 0 Site AC MW-21 Nitrate-Nitrogen &Water Level Chlorides 10 5002 50 8 - 5000 40 � - 4998 $ _ ' 6 - > 30 - 4996 am = E - E 4 = 20 - - 4994 ' _ •� 2 - 4992 10 `...,,. • 0 4990 0 - 12 13 14 15 16 17 18 12 13 14 15 16 17 18 —+—Nitrate Water Level Linear(Nitrate) ---Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 0.50 -- 400 i 0.40 300 0.30 _ J - J E - E - 200 0.20 • 100 0.10 00.00 12 13 14 15 16 17 18 12 13 14 15 16 17 18 —e—TDS --.---Total P Annual Metal Report ACMW-21 River Ranch Rd Ca K Mg Na Ag Al As Ba Be 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 6/20/2012 5.69 1.57 1.5 11.90 <10 110 <1 20 <1 <0.5 <1 <20 6/11/2013 4.91 1.32 1.23 8.66 7/8/2014 7.09 1.57 1.98 10.1 <0.5 22.1 <1 19.4 <1 <0.5 <1 <2 8/18/2015 12.5 2.14 3.53 14.7 <0.5 <20 <1 37.3 <1 <0.5 <1 <2 7/27/2016 7.78 1.84 2.20 12..3 <0.5 55 <1 23.4 <1 <0.5 <1 <2 8/16/2017 8.55 2.02 2.31 12.6 <0.5 <20 <1 26.3 <1 <0.5 <1 <2 8/14/2018 13.8 2.26 3.60 14.0 <0.5 <20 <1 39 <1 <0.5 <1 <2 Fe Hg Mn Mo Ni Pb Sb Se 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 6/20/2012 89.4 <0.2 <20 3.08 <5 <2.5 <1 <5 <1 <3 <10 6/11/2013 7/8/2014 29.8 <0.2 <2 3.97 <5 <0.5 <1 <5 <1 <3 <20 8/18/2015 <20 <0.2 <2 2.91 <5 <0.5 <1 <5 <1 <3 <20 7/27/2016 27.3 <2 2.95 <5 <0.5 <1 <5 <1 <3 <20 8/16/2017 <20. <0.2 <2 2.78 <5 <0.5 ,<1 <5 <1 <3 <20 8/14/2018 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-22 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 01/23/2018 25.80 4993.48 12.0 6.13 37.1 0.021 < 0.100 < 0.020 < 0.030 2.43 2.430 06/19/2018 23.72 4995.56 13.3 6.09 34.4 0.021 0.210 < 0.020 < 0.010 2.03 2.240 08/14/2018 27.12 4992.16 12.3 5.84 33.1 0.020 < 0.050 < 0.020 < 0.010 2.18 2.190 10/25/2018 32.10 4987.18 11.4 5.67 32.1 0.017 < 0.050 < 0.020 < 0.010 2.69 2.650 Maximum 32.10 4995.56 13.3 6.13 37.1 0.021 < 0.210 0.020 < 0.030 2.69 2.650 Minimum 23.72 4987.18 11.4 5.67 32.1 0.017 < 0.050 < 0.020 < 0.010 2.03 2.190 Average 27.19 4992.10 12.3 5.93 34.2 0.020 0.103 < 0.020 < 0.015 2.33 2.378 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-22 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Total Fecal/ Fecal TDS EC Chloride . COD SO4 Color Coli E.coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 01/23/2018 90 112 3.22 2.12 165.8 < 1 06/19/2018 75 108 3.70 2.06 3.1 < 1 08/14/2018 83 105 3.73 2.10 < 1 < 1 10/25/2018 88 111 4.59 2.19 4.1 < 1 Maximum 90 112 4.59 2.19 165.8 < 1 Minimum 75 105 3.22 2.06 < 1 < 1 Average 84 109 3.81 2.12 43.5 < 1.0 #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: 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 30.5 4988.8 10.1 6.28 31.2 2.60 0.026 0.057 0.028 < 0.010 0.58 0.646 13 32.5 4986.7 10.9 6.18 34.0 0.062 0.057 0.027 < 0.019 1.61 1.365 14 32.6 4986.7 11.9 6.24 36.7 0.017 0.102 0.023 < 0.019 2.02 2.053 15 33.3 4986.0 11.8 6.15 37.4 0.017 0.072 < 0.020 < 0.020 2.36 2.413 16 30.0 4989.3 13.1 6.14 38.8 0.017 0.128 < 0.020 < 0.025 2.62 2.650 17 22.7 4996.6 12.6 5.94 37.0 0.021 0.094 < 0.020 < 0.033 2.79 2.775 18 27.2 4992.1 12.3 5.93 34.2 0.020 0.103 < 0.020 < 0.015 2.33 2.378 Maximum 33.3 4996.6 13.1 6.28 38.8 2.60 0.062 0.128 0.028 0.033 2.79 2.775 Minimum 22.7 4986.0 10.1 5.93 31.2 2.60 0.017 0.057 0.020 0.010 0.58 0.646 Average 29.8 4989.5 11.8 6.12 35.6 2.60 0.026 0.087 0.023 0.020 2.04 2.040 #Tests 7 7 7 7 7 0 1 7 7 7 7 7 7 Site: ACMW-22 SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 2012 To: 2018 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 63 73 1.12 4.10 < 1 < 1 13 75 94 2.86 1.81 < 1 < 1 14 81 106 3.89 1.72 1 < 1 15 84 118 4.15 1.68 4 < 1 16 86 118 3.79 1.77 1 < 1 17 90 110 2.56 2.02 45 < 1 18 84 109 3.81 2.12 44 < 1 Maximum 90 118 4.15 4.10 45 1 Minimum 63 73 1.12 1.68 < 1 < 1 Average 81 104 3.17 2.17 14 1 #Tests 7 7 7 0 7 0 7 -7 0 ,, Site AC MW-22 Nitrate-Nitrogen &Water Level Chlorides 10 5000 50 8 4995 40 6 4990 7r; 30 J E7/N. E _ 4 - - 4985 F2 20 • 2 4980 10 0 , , T - 4975 0 12 13 14 15 16 17 18 12 13 14 15 16 17 18 —♦—Nitrate --ii—Water Level Linear(Nitrate) —4—Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 - 0.50 400 i 0.40 300 0.30 J - J - E E _ 200 0.20 100 0.10 0 , - 0.00 , • 12 13 14 15 16 17 18 12 13 14 15 16 17_ 18 ---TDS —4--Total P Annual Metal Report ACMW-22 Fredericksburg In Ca K Mg Na Ag Al As Ba , Be 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 6/20/2012 7.18 2.06 1.6 4.13 <10 127 <1 16.9 <1 <0.5 <1 <20 6/11/2013 8.95 2.34 1.57 4.66 7/8/2014 10.9 2.57 2.49 5.43 <0.5 <20 <1 27.2 <1 <0.5 <1 <2 8/18/2015 10.6 2.33 2.49 5.11 <0.5 <20 <1 26.6 <1 <0.5 <1 <2 7/27/2016 11.3 2.64 2.66 5.60 <0.5 <20 <1 26.4 <1 <0.5 <1 <2 8/16/2017 9.64 2.32 2.20 4.96 <0.5 <20 <1 23.6 <1 <0.5 <1 <2 8/14/2018 10.4 2.21 2.30 5.18 <0.5 <20 <1 23.5 <1 <0.5 <1 <2 Fe Hg Mn Mo Ni Pb Sb Se 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 6/20/2012 127 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 - 6/11/2013 7/8/2014 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/18/2015 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/27/2016 <20 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/16/2017 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/14/2018 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-23 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 01/23/2018 19.01 4959.34 15.0 7.19 172 0.045 < 0.100 < 0.020 < 0.010 1.05 1.050 06/19/2018 17.03 4961.32 16.9 7.21 171 0.041 < 0.050 < 0.020 < 0.010 1.05 1.080 08/14/2018 18.30 4960.05 15.8 6.99 171 0.038 < 0.050 < 0.020 < 0.010 1.06 1.010 10/25/2018 18.62 4959.73 15.2 6.97 174 0.042 < 0.050 < 0.020 < 0.010 0.97 1.000 Maximum 19.01 4961.32 16.9 7.21 174 0.045 < 0.100 0.020 < 0.010 1.06 1.080 Minimum 17.03 4959.34 15.0 6.97 171 0.038 < 0.050 < 0.020 < 0.010 0.97 1.000 Average 18.24 4960.11 15.7 7.09 172 0.042 < 0.063 0.020 < 0.010 1.03 1.035 #Tests 4 4 4 4 4 0 0 4 4 4 - 4 4 4 Site: ACMW-23 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 01/23/2018 270 382 4.27 19.7 < 1 < 1 Road washed out due to rains 06/19/2018 258 371 3.91 19.9 < 1 < 1 08/14/2018 264 378 3.97 18.6 < 1 < 1 10/25/2018 274 374 4.05 18.4 < 1 < 1 Maximum 274 382 4.27 19.9 < 1 < 1 Minimum 258 371 3.91 18.4 < 1 < 1 Average 267 376 4.05 19.2 < 1.0 < 1.0 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-23 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 18.6 4959.7 15.1 7.39 177 16.00 0.250 0.068 0.026 < 0.014 1.06 1.142 13 18.9 4959.5 14.9 7.31 175 0.152 0.091 0.024 < 0.013 1.04 1.079 14 19.0 4959.4 15.6 7.34 175 0.100 0.062 0.026 < 0.010 1.00 1.010 15 21.8 4956.6 15.0 7.35 174 0.033 0.054 < 0.020 < 0.010 1.02 1.050 16 17.0 4961.3 15.6 7.29 173 0.031 < 0.063 < 0.020 < 0.010 1.02 0.976 17 17.5 4960.8 15.4 7.32 173 0.043 < 0.092 0.021 < 0.017 1.03 0.991 18 18.2 4960.1 15.7 7.09 172 0.042 < 0.063 0.020 < 0.010 1.03 1.035 Maximum 21.8 4961.3 15.7 7.39 177 16.00 0.250 0.092 0.026 < 0.017 1.06 1.142 Minimum 17.0 4956.6 14.9 7.09 172 16.00 0.031 0.054 0.020 < 0.010 1.00 0.976 Average 18.7 4959.6 15.3 7.30 174 16.00 0.093 0.070 0.022 < 0.012 1.03 1.040 #Tests 7 7 7 7 7 0 1 7 7 7 7 7 7 Site: ACMW-23 SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 2012 To: 2018 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 269 378 4.22 17.8 1 < 1 13 271 379 4.15 19.7 1 < 1 14 271 379 4.23 19.8 1 < 1 15 273 384 4.14 19.2 9 < 1 16 266 ` 373 4.22 19.8 1 < 1 17 262 370 4.33 19.3 < 1 < 1 18 267 376 4.05 19.2 < 1 < 1 Maximum 273 384 4.33 19.8 9 1 Minimum 262 370 4.05 17.8 1 < 1 Average 268 377 4.19 19.3 2 < 1 #Tests 7 7 7 0 7 0 7 7 0 Site AC MW-23 Nitrate-Nitrogen &Water Level Chlorides 10 - - 4970 50 8 i 4965 40 $ _ 6 —■ 4960 �, 30 4 - 4955 2 20 2 4950 10 4 ♦ • 4 • •--.. _ - 4 • + 4 • • 4 0 - , , , i ,- , - 4945 0 , T , 12 13 14 15 16 17 18 12 13 14 15 16 17 18 —+—Nitrate —ii—Water Level —t—Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 - 0.50 - 400 i 0.40 300 0.30 • _ CD 13) 200 0.20 100 1 0.10 0 0.00 , 12 13 14 15 16 17 18 12 13 14 15 16 17 18 —•—TDS —•--Total P Annual Metal Report ACMW-23 • Scott Brooke's Ranch by Irrigation Ditch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/20/2012 31.4 4.47 12.6 33.1 <10 582 2.58 90.4 <1 <0.5 1.16 <20 6/11/2013 30.0 5.38 13.2 32.2 7/8/2014 33.8 6.79 17.3 31.8 <5 6630 <10 122 <10 <5 <10 20.2 8/18/2015 32.7 4.70 13.2 29.3 <0.5 2430 3.54 107 <1 <0.5 3.66 15.2 7/27/2016 30.5 4.63 14.0 31.5 <0.5 1670 2.68 110 <1 <0.5 3.47 7.54 8/16/2017 31.3 4.44 13.4 31.0 <0.5 2080 3.41 119 <1 <0.5 4.39 9.37 8/14/2018 32.6 4.27 13.6 32.3 <0.5 832 4.86 101 <1 <0.5 1.2 11.6 Fe Hg Mn Mo Ni Pb Sb Se 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 6/20/2012 1020 <0.2 <20 2.4 <5 <2.5 <1 <5 <1 13 <10 6/11/2013 7/8/2014 12700 <0.2 220 <20 <50 <5 <10 <50 <10 38.6 <200 8/18/2015 4990 <0.2 99.3 2.54 <5 0.83 <1 <5 <1 22.4 <20 7/27/2016 3610 59.6 2.04 <5 <0.5 <1 <5 <1 16.4 <20 8/16/2017 3810 <0.2 74.4 2.28 <5 <0.5 <1 <5 <1 19.5 <20 8/14/2018 1810 <0.2 33.2 2.27 <5 <0.5 <1 <5 <1 15.2 <20 • Site: ACMW-24 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 01/23/2018 26.67 4926.58 13.2 6.52 168 0.075 < 0.100 < 0.020 < 0.020 1.58 1.580 06/19/2018 23.02 4930.23 14.9 6.50 176 0.071 0.250 < 0.020 < 0.010 1.44 1.690 08/14/2018 23.63 4929.62 ' 14.1 6.30 177 0.071 < 0.050 < 0.020 < 0.010 1.70 1.720 10/25/2018 25.81 4927.44 13.7 6.19 167 0.069 0.100 < 0.020 < 0.010 1.75 1.850 Maximum 26.67 4930.23 14.9 6.52 177 0.075 < 0.250 < 0.020 < 0.020 1.75 1.850 Minimum 23.02 4926.58 13.2 6.19 167 - 0.069 < 0.050 < 0.020 < 0.010 1.44 1.580 Average 24.78 4928.47 14.0 6.38 172 0.072 0.125 < 0.020 < 0.013 1.62 1.710 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-24 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Date mg/L umhos mg/L mg/L mg/L _ Units MPN MPN MPN Comments 01/23/2018 365 600 49.2 34.5 < 1 < 1 06/19/2018 408 698 79.7 35.2 < 1 < 1 08/14/2018 402 678 75.8 37.1 < 1 < 1 10/25/2018 360 586 52.8 37.9 < 1 < 1 Maximum 408 698 79.7 37.9 < 1 < 1 Minimum 360 586 49.2 34.5 < 1 < 1 Average 384 641 64.4 36.2 < 1.0 < 1.0 #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: 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 24.4 4928.9 13.0 6.64 168 12.00 0.268 0.166 0.028 0.025 2.11 2.298 13 25.4 4927.9 13.5 6.59 165 0.127 0.124 0.024 < 0.019 2.09 2.171 14 25.2 4928.0 13.9 6.62 162 0.200 0.128 0.025 < 0.018 2.18 2.283 15 25.3 4927.9 13.7 6.58 155 0.080 0.079 < 0.020 0.018 1.91 1.975 16 24.5 4928.7 13.9 6.49 160 0.076 0.145 < 0.020 < 0.020 1.63 1.745 17 23.3 4930.0 13.6 6.55 169 0.073 < 0.095 < 0.020 < 0.020 1.84 1.873 18 24.8 4928.5 14.0 6.38 172 0.072 < 0.125 < 0.020 < 0.013 1.62 1.710 Maximum 25.4 4930.0 14.0 6.64 172 12.00 0.268 0.166 0.028 0.025 2.18 2.298 Minimum 23.3 4927.9 13.0 6.38 155 12.00 0.072 0.079 0.020 0.013 - 1.62 1.710 _Average 24.7 4928.5 13.6 6.55 165 12.00 0.128 0.123 - 0.023 0.019 1.91 2.008 #Tests 7 7 7 7 7 0 1 7 7 7 7 7 7 Site: ACMW-24 SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 2012 . To: 2018 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 334 523 39.1 38.4 2 < 1 13 342 535 46.6 31.3 1 < 1 14 352 552 55.1 28.8 < 1 < 1 15 345 531 49.1 31.1 < 1 < 1 16 354- 563 62.9 26.8 < 1 < 1 117 427 674 88.5 32.8 3 3 18 384 641 64.4 36.2 < 1 < 1 Maximum 427 674 88.5 38.4 3 3 Minimum 334 523 39.1 26.8 1 1 Average 362 574 58.0 32.2 1 1 #Tests 7 7 7 0 7 0 7 7 0 Site AC MW-24 Nitrate-Nitrogen &Water Level Chlorides 10 100 _ 4938 4933 90 _ 8 ■ �'. 4928 80 4923 70 4918 6 60 - 4913 T. J °' = 4908 2 E 50 C 4 4903 g 40 _ 4898 30 ` 2 T� 4893 •)- 4888 20 - 4883 10 1 0 � _J- 4878 0 - , 12 13 14 15 16 17 18 12 13 14 15 16 17 18 —•—Nitrate —a--Water Level Linear(Nitrate) —• –Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 0.50 - 400 - Z .i 0.40 • • • • 300 - 0.30 _ J J _ a p) E - 200 E 0.20 100 0.10 • • • 0 - 0.00 , , 12 13 14 15 16 17 18 12 13 14 15 16 17 18 —•—TDS —+—Total P Annual Metal Report ACMW-24 Scott Brooke's Ranch by Irrigation Ditch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/20/2012 46.1 4.04 19 39.4 <10 719 2.32 121 <1 <0.5 <1 <20 6/11/2013 43.8 3.64 18.4 37.9 7/8/2014 52.0 5.12 26.0 42.3 <1 4200 6.38 264 <2 <1 4.52 6.02 8/18/2015 44.2 3.39 19.1 38.0 <0.5 40.4 1.46 190 <1 <0.5 <1 <2 7/27/2016 47.6 4.34 21.9 45.2 <0.5 1420 .2.09 208 <1 <0.5 11.3 3.2 8/16/2017 52.7 4.10 23.5 44.8 <0.5 2110 2.58 228 <1 <0.5 2.3 3.39 8/14/2018 49.6 3.36 21.8 46.2 <0.5 202 3.66 218 <1 <0.5 <1 18 Fe Hg Mn Mo Ni Pb Sb Se 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 6/20/2012 874 <0.2 89 <2 <5 <2.5 <1 <5 <1 10.6 <10 6/11/2013 7/8/2014 4760 <0.2 181 <4 <10 1.3 <2 <10 <2 23.9 <40 8/18/2015 180 <0.2 4.56 <2 <5 <0.5 <1 <5 <1 8.77 <20 7/27/2016 1940 67.9 <2 <5 <0.5 <1 <5 <1 13.8 <20 8/16/2017 2590 <0.2 82.5 <2 <5 0.559 <1 <5 <1 15.7 <20 8/14/2018 256 <0.2 6.82 <2 <5 <0.5 <1 <5 <1 10.5 <20 Site: ACMW-25 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 01/23/2018 9.18 4933.06 10.8 6.28 52.0 0.045 < 0.100 < 0.020 < 0.030 2.90 2.90 06/19/2018 7.02 4935.22 14.4 6.32 46.9 0.056 0.280 < 0.020 0.010 1.77 2.05 08/14/2018 9.89 4932.35 16.2 5.92 48.7 0.056 < 0.050 < 0.020 < 0.010 - 3.17 3.11 10/25/2018 9.95 4932.29 16.5 5.83 47.9 0.048 0.060 < 0.020 < 0.010 2.87 2.93 • Maximum 9.95 4935.22 16.5 6.32 52.0 0.056 0.280 0.020 < 0.030 3.17 3.110 Minimum 7.02 4932.29 10.8 5.83 46.9 0.045 < 0.050 < 0.020 < 0.010 1.77 2.050 Average 9.01 4933.23 14.5 6.09 48.9 0.051 0.123 < 0.020 < 0.015 2.68 2.748 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-25 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 01/23/2018 131 177 8.46 7.12 < 1 < 1 06/19/2018 100 141. 4.95 4.13 150.0 1 08/14/2018 123 176 9.28 - 5.97 3.1 < 1 10/25/2018 125 163 9.12 5.60 < 1.0 < 1 Maximum 131 177 9.28 7.12 150.0 1 Minimum 100 141 4.95 4.13 < 1.0 < 1 Average 120 164 7.95 5.71 38.8 < 1.0 #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: 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 8.7 4933.5 13.8 6.41 47.7 0.38 0.049 0.137 0.025 < 0.040 3.13 3.303 13 8.8 4933.4 13.4 6.30 47.8 0.078 0.053 0.026 0.025 1.98 2.056 14 9.5 4932.8 13.2 6.38 46.7 0.053 0.124 0.023 < 0.018 1.68 1.897 15 9.8 4932.4 14.0 6.32 44.3 0.047 0.073 < 0.020 < 0.018 1.50 1.553 16 8.7 4933.5 14.0 6.27 45.1 0.043 0.235 < 0.020 < 0.020 3.59 3.828 17 7.2 4935.1 13.4 6.34 48.2 0.048 0.161 < 0.020 < 0.028 3.14 3.280 18 9.0 4933.2 14.5 6.09 48.9 0.051 0.123 < 0.020 < 0.015 2.68 2.748 Maximum 9.8 4935.1 14.5 6.41 48.9 0.38 0.078 0.235 0.026 0.040 3.59 3.828 Minimum 7.2 4932.4 13.2 6.09 44.3 0.38 0.043 0.053 0.020 0.015 1.50 1.553 Average 8.8 4933.4 13.7 6.30 46.9 0.38 0.053 0.129 0.022 0.023 2.53 2.666 #Tests 7 7 7 7 7 0 1 7 7 7 7 7 7 Site: ACMW-25 SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 2012 To: 2018 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 125 163 9.0 6.46 3 < 1 13 121 159 10.1 6.51 1 < 1 14 119 158 10.9 7.23 2 < 1 15 111 150 9.6 5.54 < 1 < 1 16 124 182 12.5 6.26 2 2 17 134 179 10.9 8.10 19 < 1 18 120 164 8.0 5.71 39 < 1 Maximum 134 182 12.5 8.10 39 2 Minimum 111 150 8.0 5.54 1 1 Average 122 165 10.2 6.54 9 1 #Tests 7 7 7 0 7 0 7 7 0 Site ACMW-25 • Nitrate-Nitrogen &Water Level Chlorides 10 4950 50 — 8 i 4945 40 6 4940 t 30 as _ O) - E 4 . 4935 , 20 2 493010 . 0 I , , 4925 Q 12 13 14 15 16 17 18 12 13 14 15 16 17 18 —.—Nitrate —a—Water Level Linear(Nitrate) —*--Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 — 0.50 — 400 i 0.40 300 _ 0.30 -_ -J J C) _ C) _ E - E - 200 0.20 100 0.10 _i ...____..----*----......_..___,, 0 I , , , , 0.00 , , 12 13 14 15 16 17 18 12 13 14 15 16 17 18 —+—TDS —4—Total P Annual Metal Report ACMW-25 Access Rd. between Neddenriep & Brooke Ca K Mg Na Ag Al As Ba Be 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 6/20/2012 14.0 3.46 4.24 12.0 <10 <20 <1 43.2 <1 <0.5 <1 <20 6/11/2013 12.4 3.44 3.79 10.8 7/8/2014 13.6 3.26 4.63 11.9 <0.5 <20 <1 40.5 <1 <0.5 <1 2.36 8/18/2015 10.5 2.91 3.72 10.6 <0.5 28.1 <1 33 <1 <0.5 <1 <2 7/27/2016 12.9 3.38 4.47 12.1 <0.5 <20 <1 39.6 <1 <0.5 <1 <2 8/16/2017 13.5 3.30 4.50 11.7 <0.5 <20 <1 42.6 <1 <0.5 1.3 <2 8/14/2018 13.1 3.23 4.26 12.5 <0.5 <20 <1 38.9 <1 <0.5 <1 <2 Fe Hg Mn Mo Ni Pb Sb Se 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 6/20/2012 66.4 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/11/2013 7/8/2014 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 3.02 <20 8/18/2015 20 <0.2, <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/27/2016 <20 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/16/2017 220 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/14/2018 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 1 Site: ACMW-26 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 01/23/2018 12.24 4883.36 10.5 6.34 68.1 0.111 < 0.100 0.034 < 0.030 0.537 0.537 06/19/2018 7.00 4888.60 16.0 6.36 65.0 0.119 0.310 < 0.020 0.019 0.305 0.634 08/14/2018 11.58 4884.02 15.1 6.03 67-- 0.116 0.168 < 0.020 0.031 0.478 0.677 10/25/2018 14.23 4881.37 14.8 6.02 69.6 0.101 0.124 < 0.020 0.062 0.692 0.878 S Maximum 14.23 4888.60 16.0 6.36 69.6 0.119 0.310 0.034 0.062 0.692 0.878 Minimum 7.00 4881.37 10.5 6.02 65.0 0.101 < 0.100 < 0.020 0.019 0.305 0.537 Average 11.26 4884.34 14.1 6.19 67.4 0.112 0.176 0.024 0.036 0.503 0.682 #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 2018 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 01/23/2018 159 247 22.8 8.60 8.4 1 06/19/2018 121 184 12.0 4.48 12.1 1 08/14/2018 130 184 11.1 4.77 < 1 < 1 10/25/2018 147 221 19.3 6.55 < 1 < 1 Maximum 159 247 22.8 8.60 12.1 1 Minimum 121 . 184 11.1 4.48 1.0 < 1 Average 139 209 16.3 6.10 5.6 1.0 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-26 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 11.4 4884.2 12.4 6.36 62.6 1.00 0.095 0.153 0.023 0.031 1.296 1.481 13 12.7 4882.9 13.4 6.38 65.4 0.107 0.229 0.026 0.026 1.411 2.087 14 13.8 4881.8 13.0 6.46 60.7 0.101 0.160 0.023 0.033 1.777 1.983 15 14.1 4881.5 12.0 6.36 57.40.079 0.146 < 0.020 0.020 3.533 3.675 16 12.4 4883.2 13.8 6.44 62.6 0.146 0.270 < 0.020 0.032 1.768 2.058 17 7.8 4887.8 12.8 6.60 74.1 0.205 0.547 0.048 < 0.015 0.420 0.957 18 11.3 4884.3 14.1 6.19 67.4 0.112 0.176 0.024 < 0.036 0.503 0.682 Maximum 14.1 4887.8 14.1 6.60 74.1 1.00 0.205 0.547 0.048 0.036 3.533 3.675 Minimum 7.8 4881.5 12.0 6.19 57.4 1.00 0.079 0.146 0.020 0.015 0.420 0.682 Average 11.9 4883.7 13.1 6.40 64.3 1.00 0.121 0.240 0.026 0.027 1.530 1.846 #Tests 7 7 7 7 7 0 1 7 7 7 7 7 7 C Site: ACMW-26 SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2018 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 137 200 16.3 6.66 7 6 13 149 219 17.0 7.94 6 3 14 150 227 21.3 8.42 7 3 15 164 254 24.1 10.65 4 1 16 160 240 19.0 15.17 32 3 17 160 225 19.5 4.96 179 7 18 139 209 16.3 6.10 6 1 Maximum 164 254 24.1 15.17 179 - 7 Minimum 137 200 16.3 4.96 4 1 Average 151 225 19.1 8.56 34 3 #Tests 7 7 7 0 7 0 7 7 0 ._ Site ACMW-26 Nitrate-Nitrogen &Water Level Chlorides 10 -- 4895 50 - 8 4890 40 D 6 4885 30 0,-----................„....... well/N1 0 J J rn 4 4880 g 20 2 ------ - 4875 10 - -- —/N_____.' 0 - �---, - 4870 0 , 12 13 14 15 16 17 18 12 13 14 15 16 17 18 —4—Nitrate —a—Water Level Linear(Nitrate) —4—Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 - 0.50 - 400 i 0.40 300 0.30 _ -J - J C) _ C) _ E E - 200 0.20 : ...---4---•-----4 •—•—•.......„. `—. Ni' 100 0.10 0 - 0.00 - 12 13 14 15 16 17 18 12 13 14 15 16 17 18 —+—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 mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/20/2012 16.1 4.14 4.31 20.6 <10 54.2 <1 47.9 <1 <0.5 <1 <20 6/11/2013 12.8 4.25 3.43 19.3 7/8/2014 19.5 5.42 5.57 27.3 <0.5 <20 <1 58 <1 <0.5 <1 4.72 8/18/2015 14.0 4.03 4.28 20.3 <0.5 24.6 <1 51.2 <1 <0.5 <1 <2 7/27/2016 15.0 5.76 4.51 21.0 <0.5 <20 <1 44.7 <1 <0.5 <1 3.27 8/16/2017 19.4 6.70 5.49 23.9 <0.5 27.9 1.24 69.3 <1 <0.5 <1 2.35 8/14/2018 11.9 4.15 3.52 18.2 <0.5 <20 <1 39.5 <1 <0.5 <1 2.73 Fe Hg Mn Mo Ni Pb Sb Se 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 6/20/2012 54 <0.2 25.9 <2 <5 <2.5 <1 <5 <1 3.16 <10 6/11/2013 7/8/2014 26.6 <0.2 80 1.99 <5 <0.5 <1 <5 <1 4.2 <20 8/18/2015 24.8 <0.2 20.7 <2 <5 <0.5 <1 <5 <1 <3 <20 7/27/2016 <20 89.4 3.85 <5 <0.5 <1 <5 <1 5.03 <20 8/16/2017 39.9 <0.2 113 2.87 <5 <0.5 <1 <5 <1 11.6 <20 8/14/2018 21.5 <0.2 213 3.32 <5 <0.5 <1 <5 <1 3.03 <20 DIAMOND VALLEY RANCH MONITORING WELLS Site: ACMW-08N SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA s 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 03/13/18 4.67 5459.78 11.7 6.73 86.7 0.044 1.0 . < 0.020 < 0.010 0.749 1.750 06/26/18 5.01 5459.44 12.4 6.76 85.3 0.044 0.062 < 0.020 0.758 0.696 < 0.010 08/29/18 3.83 5460.62 13.2 6.71 84.2 0.041 0.054 < 0.020 < 0.010 0.702 0.756 11/20/18 4.72 5459.73 12.2 6.78 81.5 0.036 0.066 < 0.020 < 0.020 0.615 0.681 Maximum . 5.01 5460.62 13.2 6.78 86.7 0.044 1.000 < 0.020 0.758 0.749 1.750 Minimum 3.83 5459.44. 11.7 6.71 81.5 0.036 0.054 < 0.020 < 0.010 0.615 < 0.010 Average 4.56 5459.89 12.4 6.75 84.4 0.041 0.296 < 0.020 0.200 0.691 0.799 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-08N SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Total Coli E. coli Fecal TDS EC Chloride COD SO4 Color Chromo Chromo Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 03/13/18 134 171 1.23 1.05 119.8 < 1 06/26/18 125 180 1.00 1.04 < 1 < 1 08/29/18 123 178 1.07 1.04 260.2 < 1 11/20/18 116 167 2.13 2.60 90.6 < 1 Maximum 134 180 2.13 2.60 260 < 1 Minimum 116 167 1.00 1.04 < 1 < 1 Average 125 174 1.36 1.43 118 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-08N SOUTH.TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2009 To: 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 09 4.3 5460.2 11.7 6.50 62 53 0.22 0.040 < 0.050 < 0.010 0.361 0.391 10 4.1 5460.3 12.4 6.62 68 0.042 0.127 < 0.010 0.450 0.536 11 4.7 5459.8 12.0 6.90 80 0.04 0.040 < 0.058 < 0.010 0.626 0.693 12 5.7 5458.7 12.0 7.02 81 0.08 0.044 < 0.055 < 0.020 < 0.010 0.744 0.808 13 6.3 5458.2 12.2 6.90 83 0.052 < 0.050 0.022 < 0.010 0.689 0.701 14 6.3 5458.2 12.0 6.98 79 0.039 0.074 0.025 < 0.010 0.672 0.679 15 7.9 5456.6 12.2 6.81 78 0.045 < 0.050 < 0.020 < 0.010 0.643 0.630 16 5.6 5458.9 12.5 6.72 76 0.044 0.067 < 0.020 < 0.010 0.595 0.589 17 3.0 5461.4 12.1 6.97 83 0.046 < 0.073 < 0.020 < 0.010 0.676 0.592 18 4.6 5459.9 12.4 6.75 84 0.041 < 0.296 < 0.020 < 0.200 0.691 0.799 Maximum 7.9 5461.4 12.5 7.02 84 53 0.22 0.052 0.296 0.025 < 0.200 0.744 0.808 Minimum 3.0 5456.6 11.7 6.50 62 53 0.04 0.039 0.050 0.020 < 0.010 0.361 0.391 Average 5.2 5459.2 12.1 6.82 78 53 0.11 0.043 0.090 0.021 < 0.029 0.614 0.642 #Tests 10 10 10 10 10 1 3 10 10 7 10 10 10 • Site: ACMW-08N SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2018 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 09 106 142 5.46 6 1.00 3.5 < 1 First year of sampling 10 110 170 3.35 1.25 2.5 < 1 11 120 164 0.77 1.80 5.4 < 1 12 130 165 0.83 1.46 < 1.0 < 1 13 125 167 0.97 1.48 23.4 < 1 14 112 162 0.91 1.17 6.4 < 1 15 120 163 1.08 1.13 147.4 < 1 16 124 152 1.16 1.07 4.4 < 1 17 126 168 1.20 1.06 262.3 < 1 18 125 174 1.36 1.43 117.9 < 1 Maximum 130 174 5.46 6 1.80 262.3 < 1.0 Minimum 106 142 0.77 < 6 1.00 < 1.0 < 1.0 __ Average 120 163 1.71 6 1.28 57.4 < 1.0 #Tests 10 10 10 1 10 0 10 10 0 Site ACMW-08N Nitrate-Nitrogen &Water Level Chlorides 5 - - 5475 40 - 4 5470 = 30 _ _ = 3 5465 m _ J J ? 5) 20 E 2 5460 E - 1 5455 10 -- 0 r - , - 5450 09 10 11 12 13 14 15 16 17 18 0 09 10 11 12 13 14 15 16 17 18 —.--Nitrate —e—Water Level __ —t—Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 - 0.4 - 400 = 0.3 - 300 = J - J - E - E 0. 2 200 - 100 i - 0.1 0 - ----,----,— - 0.0 , 09 10 11 12 13 14 15 16 17 18 09 10 11 12 13 14 15 16 17 18 --*--TDS Linear(TDS) --.--Total P Linear(Total P) Annual Metal Report ACMW-08N Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/18/2009 13.7 1.50 4.10 9.0 17.2 <20 <2 39 <1 <0.5 <1 <20 8/10/2010 15.0 1.60 5.00 9.5 <0.5 <20 <1 34 <1 <0.5 <1 <2 7/13/2011 16.7 1.86 5.80 10.8 <0.5 <20 <1 37 \ <1 <0.5 <1 <2 7/26/2012 15.6 1.88 5.34 10.2 <10 <20 <1 36.2 <1 <0.5 <1 <20 7/10/2013 16.1 1.78 5.60 10.1 7/9/2014 16.0 1.91 5.46 10.5 <0.5 <20 <1 38.2 <1 <0.5 <1 <2 8/19/2015 14.8 1.64 5.25 9.8 <0.5 <20 <1 36.6 <1 <0.5 <1 <2 8/10/2016 14.8 1.70 5.21 9.8 <0.5 <20 <1 33.8 <1 <0.5 <1 <2 7/27/2018 15.7 1.76 5.37 10.1 <0.5 <20 <1 41.2 <1 <0.5 <1 <2 8/29/2018 16.7 1.58 5.58 10.6 <0.5 <20 <1 40 <1 <0.5 <1 <2 Fe Hg Mn Mo Ni Pb Sb Se 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 6/18/2009 43.5 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 8/10/2010 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/13/2011 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/26/2012 <50 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 7/10/2013 7/9/2014 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/19/2015 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/10/2016 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/27/2018 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/29/2018 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-09D SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 3/20/2018 35.19 5475.37 12.0 6.32 31.5 0.058 < 0.100 < 0.020 < 0.020 1.610 1.61 5/17/2018 26.26 5484.30 13.4 6.13 31.6 0.057 < 0.080 < 0.020 < 0.010 1.420 1.47 9/18/2018 32.62 5477.94 12.9 6.19 33.4 0.062 < 0.050 < 0.200 < 0.005 1.110 1.12 11/21/2018 34.40 5476.16 11.9 6.03 32.9 0.054 < 0.050 < 0.020 < 0.010 1.130 1.16 Maximum 35.19 5484.30 13.4 6.32 33.4 0.062 < 0.100 < 0.200 < 0.020 1.610 1.610 Minimum 26.26 5475.37 11.9 6.03 31.5 0.054 < 0.050 < 0.020 < 0.005 1.110 1.120 Average 32.12 5478.44 12.6 6.17 32.4 0.058 0.070 < 0.065 < 0.011 1.318 1.340 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-09D SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Total Coli E. coli Fecal TDS EC Chloride COD SO4 Color Chromo Chromo Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 3/20/2018 95 78.7 1.37 3.30 209.8 < i 1 5/17/2018 88 81.2 1.44 . 2.83 6.3 < 1 9/18/2018 84 83 < 1.00 1.50 2 < 1 11/21/2018 81 82.8 1.67 2.99 6.3 < 1 Maximum 95 83 1.67 3.30 210 < 1 Minimum 81 79 < 1.00 1.50 2 < 1 Average 87 81 1.37 2.66 56 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: _ ACMW-09D SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2009 To: 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 09 27.4 5483.2 13.1 6.37 32 25 4.43 0.059 0.052 < -0.010 0.865 0.808 10 30.1 5478.7 12.9 6.22 33 0.058 < 0.050 < 0.010 0.870 0.920 11 34.3 5476.2 12.2 6.32 34 0.83 0.057 0.100 < 0.015 1.077 1.167 12 38.7 5471.9 13.1 6.68 32 1.60 0.107 0.121 0.020 < 0.010 0.750 0.880 13 35.4 5475.2 12.7 6.36 32 0.067 < 0.050 0.022 < 0.010 0.701 0.661 14 32.8 5477.7 13.2 6.57 32 0.067 0.060 0.027 < 0.010 0.716 0.722 15 36.9 5473.6 13.3 6.43 31 0.058 < 0.050 < 0.020 < 0.010 0.882 0.741 16 31.5 5479.1 12.6 6.31 33 _ 0.059 < 0.078 < 0.020 < 0.010 0.968 0.798 17 24.6 5486.0 12.8 6.43 32 0.052 0.155 0.024 < 0.045 3.083 3.080 18 32.1 5478.4 12.6 6.17 32 0.058 0.070 0.065 < 0.011 1.318 1.340 Maximum 38.7 5486.0 13.3 6.68 34 25 4.43 0.107 0.155 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 32.4 5478.0 12.8 6.39 32 25 2.29 0.064 0.078 0.028 < 0.014 1.123 1.112 #Tests 10 10 10 10 10 1 3 10 10 7 10 10 10 Site:_ ACMW-09D SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2018 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 09 81 79 1.37 < 5 2.29 5.0 2.8 First year of sampling 10 79 81 1.28 2.59 5.2 2.3 11 84 85 1.61 2.78 < 1.0 < 1.0 12 87 79 1.39 2.83 < 1.0 < 1.0 13 83 76 1.35 3.26 < 1.0 < 1.0 14 80 76 1.41 3.57 < 1.0 < 1.0 15 82 81 1.41 3.56 < 1.0 < 1.0 16 83 79 1.48 3.45 130.1 < 1.0 17 95 97 1.58 3.55 176.8 < 1.0 18 87 81 1.37 2.66 56.1 < 1.0 Maximum 95 97 1.61 5 3.57 176.8 2.8 Minimum 79 76 1.28 < 5 2.29 < 1.0 < 1.0 Average 84 82 1.42 5 3.05 37.8 1.3 #Tests 10 10 10 1 10 0 10 10 0 Site ACMW-09D Nitrate-Nitrogen &Water Level Chlorides 5 - _ 5495 50 4 - 5490 40 - - 5485 3 - 30 - 5480 2 — 20 5475 :It, _ J 10 5470 p - 5465 0 4 . ♦ • • • • . • 09 10 11 12 13 14 15 16 17 18 09 10 11 12 13 14 15 16 17 18 t Nitrate —u—Water Level Linear(Nitrate) --+—Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 v 0.4 400 0.3 300 8) 0.2 _ E - E 200 0.1 - - 100 0 - 0.0 09 10 11 12 13 14 15 16 17 18 09 10 11 12 13 14 15 16 17 18 —0—TDS Linear(TDS) ---.—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 mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/18/2009 6.20 0.951 1.70 6.48 16.6 760 2.48 27 <1 <0.5 <1 <20 7/8/2010 7.30 <1 2.00 6.80 <0.5 570 <1 28 <1 <0.5 <1 <2 7/13/2011 6.85 1 1.78 7.89 <0.5 132 <1 23.4 <1 <0.5 <1 <2 7/26/2012 6.16 0.91 1.17 7.54 <10 79.6 <1 21.3 <1 <0.5 <1 <20 8/1/2014 6.34 <1 1.74 7.15 <0.5 105 1.74 21.2 <1 <0.5 <1 <2 6/11/2015 6.30 1.12 1.70 7.74 <0.5 102 1.95 16.4 <1 <0.5 <1 <2 8/16/2016 6.22 <1 1.69 7.68 <0.5 95.8 1.01 21.1 <1 0.671 <1 <2 6/8/2017 7.85 <1 2.17 7.11 <0.5 106 <1 24.4 <1 <0.5 <1 <2 9/18/2018 6.56 <1 1.68 7.94 <0.5 203 <1 18 <1 <0.5 <1 <2 Fe Hg Mn Mo Ni Pb Sb Se 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 6/18/2009 632 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 14.5 7/8/2010 690 <0.2 14 <2 <5 0.54 <1 <5 <1 <3 <20 7/13/2011 85.1 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/26/2012 170 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 8/1/2014 296 <0.2 5.62 <2 <5 <0.5 <1 <5 <1 <3 <20 6/11/2015 231 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/16/2016 35.4 <0.2 <2 <2 <5 0.618 <1 <5 <1 <3 <20 6/8/2017 46.1 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 9/18/2018 241 <0.2 <2 <2 <5 <0.5 <1 <5 <1 Site: ACMW-10 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 3/20/2018 32.82 5501.37 11.6 6.29 72.4 0.041 < 0.100 < 0.020 0.010 0.499 , 0.499 5/17/2018 25.72 5508.47 12.5 6.02 82.7 0.041 0.122 < 0.020 < 0.010 0.442 0.564 9/18/2018 29.80 5504.39 13.8 6.54 76.2 0.035 < 0.050 < 0.020 < 0.005 0.443 0.422 11/21/2018 Dry Maximum 32.82 5508.47 13.8 6.54 82.7 0.041 0.122 < 0.020 0.010 0.499 0.564 Minimum 25.72 5501.37 11.6 6.02 72.4 0.035 < 0.050 < 0.020 < 0.005 0.442 0.422 Average 29.45 5504.74 12.6 6.28 77.1 0.039 0.091 < 0.020 0.008 0.461 0.495 #Tests 3 3 3.0 3 3.0 0 0 3 3 3 3 3 3 t__ Site: ACMW-10 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 ,, Total Coli E. coli Fecal TDS EC Chloride COD SO4 Color Chromo Chromo Strep -Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 3/20/2018 138 165 5.37 5.50 < 1 < 1 5/17/2018 137 181 4.26. 3.83 < 1 < 1 9/18/2018 127 344 4.20 3 < 1 < 1 11/21/2018 Dry. Maximum 138 344 5.37 5.50 < 1.0 < 1.0 Minimum 127 165 4.20 3.00 < 1.0 < 1.0 Average 134 230 4.61 4.11 < 1.0 < 1.0 #Tests 3 3 3 0 3 0 3 3 0 Site: ACMW-10 - SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2009 To: 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 09 26.1 5508.1 11.8 6.46 113 100 1.51 0.044 < 0.050 < 0.010 0.141 0.171 10 25.7 5505.9 12.1 6.39 97 0.046 < 0.050 < 0.010 0.148 0.198 11 30.0 5504.2 10.8 6.52 85 0.044 < 0.050 < 0.010 0.145 0.218 12 34.3 5499.9 12.7 6.47 91 1.20 0.212 0.122 < 0.020 < 0.010 0.113 0.245 13 31.4 5502.8 12.0 6.43 82 0.035 0.056 < 0.020 < 0.010 0.150 0.156 14 30.7 5503.4 12.6 6.53 72 0.040 0.079 0.030 < 0.010 0.231 . 0.280 15 33.4 5500.8 . 13.1 6.36 - 76 0.040 < 0.050 < 0.020 < 0.010 0.260 0.257 16 29.1 5505.1 12.8 6.34 74 0.039 < 0.078 < 0.020 < 0.010 0.798 0.784 17 26.2 5508.0 12.3 6.55 77 0.040 < 0.080 0.022 < 0.010 0.442 0.377 18 29.4 5504.7 12.6 6.28 77 0.039 < 0.091 0.020 < 0.008 0.461 0.495 Maximum 34.3 5508.1 13.1 6.55 113 100 ‘ 1.51 0.212' 0.122 0.030 < 0.010 0.798 0.784 Minimum 25.7 5499.9 10.8 6.28 72 100 1.20 0.035 < 0.050 < 0.020 < 0.008 0.113 0.156 Average 29.6 5504.3 12.3 6.43 84 100 1.35 0.058 0.070 0.022 < 0.010 0.289 0.318 #Tests 10 10 10 10 10 1 2 10 10 7 10 10 10 r Site: ACMW-10 SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2018 Total Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 09 162 248 5.28 < 5 3.42 < 1.0 < 1.0 First year of sampling 10 145 208 4.91 3.60 < 1.0 < 1.0 11 131 190 4.99 3.43 < 2.4 < 1.0 12 153 193 4.48 2.54 < 1.0 < 1.0 13 124 176 4.03 2.31 < 1.0 < 1.0 14 114 159 4.51 3.35 < 1.0 < 1.0 15 129 175 . 4.56 2.88 < 1.0 < 1.0 16 128 169 4.96 3.30 < 1.0 < 1.0 17 116 168 4.51 4.53 < 1.0 < 1.0 18 134 230 4.61 4.11 -< 1.0 < 1.0 Maximum 162 248 5.28 < 5 4.53 < 2.4 < 1.0 Minimum 114 159 4.03 < 5 2.31 < 1.0 < 1.0 Average 133 192 4.68 < 5 3.35 < 1.1 < 1.0 #Tests 10 10 10 1 10 0 10 10 0 Site A Nitrate-Nitrogen &Water Level Chlorides 1.0 - 5515 50 0.8 5510 40 AA.0.6 5505 d 30 0.4 "- 5500 20 0.2 114°° - 5495 10 0.0 5490 0 09 10 11 12 13 14 15 16 17 18 09 10 11 12 13 14 15 16 17 18 —+—Nitrate —a--Water Level Linear(Nitrate) —+—Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 - m-- 0.4 - 400 _ 0.3 300 = co E 0.2 200 100 0.1 0 I ,- 0.0 -` 09 10 11 12 13 14 15 16 17 18 09 10 11 12 13 14 15 16 17 18 --♦—TDS Linear(TDS) Total P Linear(Total P) Annual Metal Report ACMW-10 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/18/2009 35.1 1.46 7.51 10.4 21.5 130 <2 31 <1 <0.5 <5 <20 7/8/2010 24.0 <1 6.40 7.50 <0.5 330 <1 27 <1 <0.5 <1 <2 7/26/2012 20.4 1.22 6.05 9.11 <10 324 <1 34.7 <1 <0.5 <1 <20 8/1/2014 18.8 1.16 5.30 8.58 <0.5 <20 <1 30 <1 <0.5 <1 <2 6/11/2015 16.5 <1 4.84 7.88 <0.5 <20 <1 30.7 <1 <0.5 <1 <2 8/16/2016 17.1 <1 5.08 7.62 <0.5 51.2 <1 26.9 <1 <0.5 <1 <2 6/8/2017 17.9 <1 5.67 6.89 <0.5 827 <1 32.4 <1 <0.5 <1 <2 9/18/2018 19.6 <1 5.49 8.28 <0.5 <20 <1 33.4 <1 <0.5 <1 <2 Fe Hg Mn Mo Ni Pb Sb Se 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 6/18/2009 137 <0.2 <20 2.9 <5 <2.5 <1 <5 <1 <3 <10 7/8/2010 580 <0.2 20 <2 <5 <0.5 <1 <5 <1 <3 <20 7/26/2012 135 <0.2 <20 <2 <5 <1 <5 <1 <3 <10 8/1/2014 24.1 <0.2 2.71 <2 <5 <0.5 <1 <5 <1 <3 <20 6/11/2015 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/16/2016 85 <0.2 3.2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/8/2017 1320 <0.2 35.7 <2 <5 <0.5 <1 <5 <1 3.9 <20 9/18/2018 <20 <0.2 4.1 <2 <5 <0.5 <1 <5 <1 Site: ACMW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 3/20/2018 23.35 5479.66 10.5 6.11 36.7 0.023 0.100 __< 0.020 < 0.020 3.120 3.22 5/17/2018 15.5 5487.5 9.2 5.83 34.2 0.015 < 0.080 < 0.020 < 0.010 1.210 1.28 9/18/2018 19.34 5483.67 14.8 6.31 37.7 - 0.020 < 0.050 < 0.020 < 0.005 2.720 2.79 11/21/2018 21.6 5481.4 12.6 6.08 32.3 0.018 0.330 < 0.020 < 0.010 4.630 4.96 Maximum 23.35 5487.51 14.8 6.31 37.7 0.023 0.330 < 0.020 < 0.020 4.630 4.960 Minimum 15.50 5479.66 9.2 5.83 32.3 0.015 < 0.050 < 0.020 < 0.005 1.210 1.280 Average 19.95 5483.06 11.8 6.08 35.2 0.019 0.140 < 0.020 < 0.011 2.920 _ 3.063 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-11SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Total Coli E. coli Fecal TDS EC Chloride COD SO4 Color Chromo Chromo Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 3/20/2018 89 106.0 2.47 3.58 < 1 < 1 5/17/2018 73 91.4 1.85 4.33 < 1 < 1 9/18/2018 85 232.0 2.00 2.50 < 1 < 1 11/21/2018 91 124.0 2.80 4.48 < 1 < 1 Maximum 91 232.0 2.80 4.48 < 1 < 1 Minimum 73 91.4 1.85 2.50 < 1 < 1 Average_ 85 138.4 2.28 3.72 < 1 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2009 To: 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L • NTU mg/L mg/L mg/L mg/L mg/L mg/L 09 19.6 5485.4 11.4 6.10 40 36 1.23 0.026 < 0.050 < 0.010 0.258 0.290 10 17.2 5483.6 11.4 5.95 35 0.031 < 0.050 < 0.010 0.422 0.472 11 23.7 5479.3 9.7 6.14 41 3.60 0.016 0.117 < 0.010 0.366 0.450 12 27.1 5475.9 11.1 6.60 32 1.50 0.123 0.207 0.021 < 0.010 0.554 0.771 13 23.2 5479.8 11.3 6.24 30 0.023 0.053 0.023 < 0.010 1.767 1.647 14 20.7 5482.3 13.6 6.27 28 0.029 0.138 0.032 < 0.025 2.773 2.873 15 24.9 5478.1 9.7 6.29 28 0.018 0.050 < 0.020 < 0.020 1.278 1.135 16 18.3 5484.7 12.8 6.17 26 0.021 0.190 < 0.020 < 0.030 2.931 2.642 17 15.6 5487.4 12.3 6.39 33 0.022 0.670 < 0.023 < 0.020 1.072 1.635 18 19.9 5483.1 11.8 " 6.08 35 0.019 0.140 < 0.020 < 0.011 2.920 3.063 Maximum 27.1 5487.4 13.6 6.60 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 21.0 5482.0 11.5 6.22 33 36 2.11 0.033 0.1.66 0.023 0.016 1.434 1.498 #Tests 10 10 10 10 10 1 3 10 10 7 10 10 10 Site: ACMW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2018 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L _ Units MPN MPN MPN Comments 09 68 93 1.63 < 5 1.85 < 1.0 < 1.0 First year of sampling 10 63 83 1.45 2.39 < 1.0 < 1.0 11 67 90 1.71 2.37 < 1.0 < 1.0 12 140 79 1.71 2.60 < 1.0 < 1.0 13 69 83 1.95 3.06 < 1.0 < 1.0 14 75 94 3.17 4.55 < 1.0 < 1.0 15 66 82 1.95 4.40 1.0 < 1.0 16 69 92 2.27 4.47" < 1.0 < 1.0 17 65 82 1.74 3.47 < 1.0 < 1.0 18 85 138 2.28 3.72 < 1.0 < 1.0 Maximum 140 138 3.17 5 4.55 < 1.0 < 1.0 Minimum 63 79 1.45 < 5 1.85 < 1.0 < 1.0 Average 77 92 1.99 5 3.29 - < 1.0 < 1.0 #Tests 10 10 10 1 10 0 10 10 0 Site ACMW-11 Nitrate-Nitrogen &Water Level Chlorides 5 — - 5495 50 4 5490 40 3 5485 = 30 of J E � E 2 5480 20 )41\ ,\ 5475 10 .41110 0 5470 0 09 10 11 12 13 14 15 16 17 18 09 10 11 12 13 14 15 16 17 18 —e—Nitrate —a—Water Level Linear(Nitrate) --.--Chloride Linear(Chloride) _ Total Dissolved Solids (TDS) Total Phosphorus 500 - 0.4 400 0.3 300 'a 0.2 - E 200 0.1 A 100 0 0.0 , 09 10 11 12 13 14 15 16 17 18 09 10 11 12 13 14 15 16 17 18 —t—TDS Linear(TDS) —+—Total P Linear(Total P) Annual Metal Report ACMW-11 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 7/15/2009 8.80 1.30 2.50 4.50 <0.5 <20 <2 25 <1 <0.5 <1 <2 7/8/2010 7.70 1.30 2.40 4.40 <0.5 600 <1 29 <1 <0.5 <1 <2 7/13/2011 8.64 1.25 2.58 4.67 <0.5 258 <1 27.2 <1 <0.5 <1 <2 7/26/2012 7.27 1.28 1.92 4.50 <10 49.8 <1 21.6 <1 <0.5 <1 <20 8/1/2014 12.1 1.78 3.39 6.54 <0.5 <20 <1 39.8 <1 <0.5 <1 <2 6/11/2015 8.62 1.31 2.60 4.71 <0.5 188 1.59 22.3 <1 <0.5 <1 <2 8/16/2016 6.20 1.28 1.77 4.91 <0.5 145 <1 20.7 <1 <0.5 <1 <2 6/8/2017 7.07 1.02 2.14 4.07 <0.5 30.4 <1 21.6 <1 <0.5 <1 <2 9/18/2018 10.6 1.16 2.98 5.42 <0.5 148 <1 34.1 <1 <0.5 <1 <2 Fe Hg Mn Mo Ni Pb Sb Se TI V Zn ug/L iug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 7/15/2009 <50 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/8/2010 840 <0.2 19 <2 <5 <0.5 <1 <5 <1 <3 <20 7/13/2011 210 <0.2 6.52 <2 <5 <0.5 <1 <5 <1 <3 <20 7/26/2012 80.5 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 8/1/2014 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/11/2015 253 <0.2 4.4 <2 <5 <0.5 <1 <5 <1 <3 <20 8/16/2016 123 _<0.2 3.19 <2 <5 <0.5 <1 <5 <1 <3 <20 6/8/2017 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 9/18/2018 163 <0.2 5.1 <2 <5 <0.5 <1 <5 <1 Site: ACMW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level- C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 3/13/2018 34.04 5491.00 10.9 6.54 47.6 0.037 < 0.100 < 0.020 < 0.010 0.380 0.380 4/25/2018 20.42 5504.62 11.7 6.72 48.4 0.035 < 0.050 < 0.020 < 0.010 0.397 0.365 8/29/2018 29.03 5496.01 13.7 6.45 46.5 0.041 0.070 < 0.020 < 0.020 0.363 0.433 11/20/2018 32.44 5492.60 10.8 6.55 47.4 0.030 < 0.050 < 0.020 < 0.010 0.370 0.417 Maximum 34.04 5504.62 13.7 6.72 48.4 0.041 < 0.100 < 0.020 < 0.020 0.397 0.433 Minimum 20.42 5491.00 10.8 6.45 46.5 0.030_ < 0.050 < 0.020 < 0.010 - 0.363 0.365 Average 28.98 5496.06 11.8 6.57 47.5 0.036 0.068 < 0.020 < 0.013 0.378 0.399 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-12 SOUTH TAHOE PUBLICUTILITYDISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Total Coli E. coli Fecal TDS EC Chloride COD SO4 Color Chromo Chromo Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 3/13/2018 103 106 1.65 2.57 < 1 < 1 4/25/2018 99 108 1.50 2.66 < 1 < 1 8/29/2018 96 107 1.70 2.55 < 1 < 1 11/20/2018 85 107 1.76 2.83 < 1 < 1 Maximum 103 108 1.76 2.83 < 1 < 1 Minimum 85 106 1.50 2.55 < 1 < 1 Average 96 107 1.65 2.65 < 1 < 1 #Tests 4 4 4 0 4 0 4 4 0 , Site: ACMW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY'GROUNDWATER QUALITY DATA From: 2009 To: 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 09 30.9 5494.1 12.3 6.82 64 60 0.30 0.034 < 0.050 < 0.010 0.774 0.804 10 30.7 5492.0 - 11.9 6.59 61 0.034 < 0.050 < 0.010 0.713 0.763 11 33.1 5491.9 11.5 6.70 57 0.21 0.032 < 0.058 < 0.010 0.602 0.669 12 34.9 5490.1 11.1 6.89 52 0.04 0.036 0.081 0.024 < 0.010 0.588 0.678 13 30.9 5494.2 11.5 6.83 53 0.053 0.232 0.023 < 0.010 0.553 0.758 14 30.8 5494.2 11.9 6.81 , 51 0.034 0.072 0.025 < 0.010 0.557 0.585 15 33.9 5491.1 12.1 6.63 50 0.041 < 0.050 < 0.020 < 0.010 0.558 0.551 16 27.9 5497.2 12.0 6.55 51 0.041 < 0.063 < 0.020 < 0.010 0.468 0.440 17 25.5 5499.5 11.9 6.73 49 0.048 < 0.075 0.021 < 0.010 0.353 0.293 18 29.0 5496.1 11.8 6.57 47 - 0.036 < 0.068 < 0.020 < 0.013 0.378 0.399 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 11.1 6.55 47 60 0.04 0.032 < 0.050 0.020 < 0.010 0.353 0.293 Average 30.8 5494.0 11.8 6.71 54 60 0.18 0.039 < 0.080 0.022 < 0.010 0.554 0.594 #Tests 10 10 10 10 10 1 3 10 10 7 10 10 10 Site: ACMW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2018 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 09 114 142 1.89 7 4.26 < 1.0 < 1.0 First year of sampling 10 108 138 1.64 3.90 < 1.0 < 1.0 .11 103 130 1.53 3.50 < 1.0 < 1.0 12 107 119 1.53 3.29 < 1.0 < 1.0 13 105 119 1.48 3A4 < 1.0 < 1.0 14 99 115 1.58 2.92 < 1.0 < 1.0 15 100 119 - 1.63 2.70 < 1.0 < 1.0 16 104 111 1.70 2.65 < 1.0 < 1.0 17 96 106 1.65 2.58 < 1.0 < 1.0 " 18 96 107 1.65 2.65 < 1.0 < 1.0 Maximum 114 142 1.89 7 4.26 < 1.0 < 1.0 Minimum 96 106 1.48 7 2.58 < 1.0 < 1.0 Average 103 121 1.63 7 3.16 < 1.0 < 1.0 #Tests 10 10 10 1 10 0 10 10 0 s Site ACMW-12 Nitrate-Nitrogen &Water Level Chlorides 5 - 5505 50 4 5500 40 ._ 3 5495 30 d E /1 2 5490 20 1 5485 10 • 0 — , , _ -...r_. _ t _ ...�= 5480 0 ------ r 09 10 11 12 13 14 15 16 17 18 09 10 11 12 13 14 15 16 17 18 —+—Nitrate --t-Water Level Linear(Nitrate) —♦--Chloride - Total Dissolved Solids (TDS) Total Phosphorus 500 - 0.4 400 0.3 300 J J - 'a 0.2 E - E 200 0.1 100 • +- • i 0 - , 0.0 09 10 11 12 13 14 15 16 17 18 09 10 11 12 13 14 15 16 17 18 �—TDS —.--Total P Annual Metal Report ACMW-12 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be 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 6/18/2009 15.5 1.9 4.04 5.75 <10 22 <2 21 <1 <0.5 <1 <20 7/8/2010 16.0 1.40 4.00 4.90 <0.5 <20 <1 21 <1 <0.5 <1 <2 7/13/2011 15.0 1.56 3.81 4.79 <0.5 <20 <1 19.2 <1 <0.5 <1 <2 7/26/2012 12.9 1.51 3.27 4.56 <10 <20 <1 19.4 <1 <0.5 <1 <20 7/10/2013 13.0 1.37 3.25 4.46 7/9/2014 13.5 1.59 3.66 4.82 <0.5 <20 <1 23 <1 <0.5 <1 <2 8/19/2015 12.7 1.28 3.62 4.58 <0.5 <20 <1 22.1 <1 <0.5 <1 <2 8/10/2016 12.1 1.32 3.52 4.52 <0.5 <20 <1 22.3 <1 <0.5 <1 <2 7/27/2017 11.0 1.27 3.15 4.12 <0.5 <20 <1 20.8 <1 <0.5 <1 <2 8/29/2018 11.4 1.09 3.19 4.26 <0.5 <20 <1 22.7 <1 <0.5 <1 <2 Fe Hg Mn Mo Ni Pb Sb .Se 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 6/18/2009 81.7 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <)3 <10 8/10/2010 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/13/2011 <20 <0.2 <2 <2 <5 <0.5 <1 ,<5 <1 <3 <20 7/26/2012 <50 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 7/10/2013 7/9/2014 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/19/2015 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/10/2016 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/2/2017 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/29/2018 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT - ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 3/13/2018 11.53 5543.02 8.2 6.08 52.8 0.034 < 0.100 < 0.020 < 0.010 0.922 0.922 4/25/2018 9.53 5545.02 9.0 6.27 53.9 0.023 < 0.050 < 0.020 < 0.010 0.928 0.878 8/29/2018 11.84 5542.71 12.6 6.11 51.1 0.027 < 0.050 < 0.020 < 0.010 1.390 1.430 11/20/2018 12.08 5542.47 10.9 - 6.18 51.4 0.056 < 0.050 < 0.020 < 0.020 1.580 1.480 Maximum 12.08 5545.02 12.6 6.27 53.9 0.056 < 0.100 < 0.020 < 0.020 1.580 1.480 Minimum 9.53 5542.47 8.2 6.08 51.1 0.023 < 0.050 < 0.020 < 0.010 - 0.922 0.878 Average 11.25 5543.31 10.2 6.16 52.3 > 0.035 < 0.063 < 0.020 < 0.013 1.205 1.178 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Total Coli E. coli Fecal TDS EC Chloride COD SO4 Color Chromo Chromo Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 3/13/2018 128 119.0 2.37 1.72 < 1 < 1 4/25/2018 140 120.0 2.06 3.46 < 1 < 1 8/29/2018 91 125.0 1.86 3.72 < 1 < 1 11/20/2018 115 124.0 2.63 3.06 < 1 < 1 Maximum 140 125.0 2.63 3.72 < 1 < 1 Minimum 91 119.0 1.86 1.72 < 1 < 1 Average 119 122.0 2.23 2.-99 < 1 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L- mg/L mg/L 12 10.9 5543.6 10.6 6.15 42 54.80 0.550 0.089 0.023 < 0.010 0.113 0.212 13 10.4 5544.1 8.7 6.45 40 0.658 0.135 0.027 0.014 0.092 0.223 14 11.3 5543.3 10.2 6.38 • 37 0.419 0.098 0.027 < 0.010 - 0.045 0.135 15 12.5 5542.1 10.7 6.21 38 0.025 0.068 < 0.020 < 0.010 0.050 0.115 16 10.8 5543.8 10.4 6.07 39 0.026 0.087 < 0.020 < 0.010 0.068 0.154 17 9.5 5545.1 9.5 6.34 46 0.024 0.080 0.022 < 0.010 0.395 0.412 18 11.2 5543.3 10.2 6.16 52 0.035 < 0.063 < 0.020 < 0.013 1.205 1.178 Maximum 12.5 5545.1 10.7 6.45 52 54.80 0.658 0.135 0.027 0.014 1.205 1.178 _ Minimum 9.5 5542.1 8.7 6.07 37 54.80 0.024 0.063 0.020 < 0.010 0.045 0.115 Average 10.9 5543.6 10.0 6.25 42 54.80 0.248 0.088 0.023 0.011 0.281 0.347 #Tests 7 7 7 7 7 0 1 7 7 7 7 7 7 -- Site: Site: ACMW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 2012 To: 2018 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L - umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 109 90 1.40 2.24 1 < 1.0 First year of sampling 13 145 86 1.38 2.62 < 1 < 1 14 98 80 1.36 2.23 < 1 < 1 15 103 88 1.42 2.06 < 1 < 1 16 110 86 1.60 2.30 < 1 < 1 17 115 103 2.12 2.38 < 1 < 1 18 119 122 2.23 2.99 < 1 < 1 Maximum 145 122 2.23 . 2.99 1 < 1.0 Minimum 98 80 1.36 2.06 1 < 1.0 Average 114 94 1.64 2.40 1 < 1.0 #Tests 7 7 7 0 7 0 7 7 0 ._ Site ACMW-13 . _ Nitrate-Nitrogen &Water Level Chlorides 2.5 - 5550 50 _ 2.0 5545 40 v 1.55540 30 /- J E - �, E 1.0 - 5535 20 0.5 5530 - 10 0.0 -� z, - --a_ 5525 0 *,,,,...--44. • r • —�. f r 12 13 14 15 16 17 18 12 13 14 15 16 17 18 • —♦—Nitrate —f—Water Level Linear(Nitrate) —.—Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 1.0 - 400 0.8 300 0.6 J J - E E - 200 0.4 < 7,_% ,,, 100 „—.......4.......==t_. 0.2 I 12 13 14 15 16 17 18 12 13 14 15 16 17 18 —.--TDS Linear(TDS) —+--Total P Linear(Total P) Annual Metal Report ACMW-13 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/19/2012 9.07 2.30 2.90 5.36 <10 3500 <1 55.9 <1 <0.5 1.24 <20 7/10/2013 4.85 6.92 6.47 5.70 7/9/2014 7.80 2.08 2.71 4.90 <0.5 387 1.43 34.5 <1 <0.5 1.01 <2 8/19/2015 9.57 5.62 6.44 5.62 <0.5 13000 1.92 176 <1 <0.5 11.5 11.8 8/10/2016 8.22 2.43 3.08 4.89 <0.5 3810 <1 62.4 <1 <0.5 3.98 4.34 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 8/29/2018 13.4 2.47 4.16 6.71 <0.5 3840 <1 65.5 <1 <0.5 2.61 3.96 Fe Hg Mn Mo Ni Pb Sb Se 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 6/19/2012 3840 <0.2 106 <2 <5 <2.5 <1 <5 <1 6.03 18.5 7/10/2013 7/9/2014 3610 <0.2 30.6 <2 <5 <0.5 <1 <5 <1 <3 <20 8/19/2015 22700 <0.2 497 <2 5.93 5.3 <1 <5 <1 29.3 48.2 8/10/2016 5260 <0.2 110 <2 <5 1.26 <1 <5 <1 8.06 <20 7/27/2017 7860 <0.2 170 <2 <5 1.99 <1 <5 <1 13.3 26.8 8/29/2018 4860 <0.2 99.3 <2 <5 1.28 <1 <5 <1 7.37 <20 Site: ACMW-14 • SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 03/20/2018 16.49 5530.71 9.8 5.95 31.7 0.025 < 0.100 < 0.020 < 0.020 1.5 1.500 05/17/2018 12.58 5534.62 10.1 5.18 23.8 0.024 0.210 < 0.020 < 0.010 1.6 1.830 09/18/2018 18.55 5528.65 13.2 6.23 29.9 0.021 < 0.050 < 0.020 < 0.005 0.94 0.922 11/21/2018 18.40 5528.80 12.3 6.02 28.1 0.020 < 0.050 < 0.020 < 0.010 0.47 0.517 Maximum 18.55 5534.62 13.2 6.23 31.7 0.025 0.210 < 0.020 < 0.020 1.62 1.830 Minimum 12.58 5528.65 9.8 5.18 23.8 0.020 < 0.050 < 0.020 < 0.005 0.47 0.517 Average 16.51 5530.70 11.4 5.85 28.4 0.023 0.103 < 0.020 < 0.011 1.13 1.192 #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 2018 Total Coli E. coli Fecal TDS EC Chloride COD SO4 Color Chromo Chromo Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 03/20/2018 71 80.4 < 1.00 2.63 < 1 < 1 05/17/2018 85 70.0 0.95 2.36 488.4 < 1 09/18/2018 75 71.5 < 1.00 1.70 4.1 < 1 11/21/2018 68 65.7 1.18 2.82 1 < 1 Maximum 85 80.4 1.18 2.82 488.4 < 1 Minimum 68 65.7 < 0.95 1.70 < 1 < 1 Average 75 71.9 1.03 2.38 124 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-14 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2018- Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 _ 19.3 5527.9 10.8 6.12 42 0.75 0.042 0.054 0.023 < 0.010 0.475 0.539 13 18.2 5529.0 10.8 6.20 37 0.056 0.052 0.025 < 0.012 0.706 0.698 14 19..5 5527.7 11.2 6.29 37 0.044 0.078 0.026 < 0.010 0.429 0.497 15 21.0 5526.2 11.4 6.23 38 0.042 < 0.050 < 0.020 < 0.010 0.565 0.568 16 18.4 5528.8 11.5 6.02 31 0.021 0.111 < 0.020 < 0.028 1.510 1.560 17 16.6 5530.6 10.7 6.03 24 0.022 1.123 0.023 < 0.140 9.225 10.338 18 16.5 5530.7 11.4 5.85 28 0.023 0.103 < 0.020 < 0.011 1.132 1.192 Maximum 21.0 5530.7 11.5 6.29 42 0.75 0.056 1.123 0.026 0.140 9.225 10.338 Minimum 16.5 5526.2 10.7 5.85 24 0.75 0.021 0.050 0.020 < 0.010 0.429 0.497 Average 18.5 5528.7 11.1 6.10 34 0.75 0.036 0.224 0.022 0.031 2.006 2.199 #Tests 7 7 7 7 7 0 1 7 7 7 7 7 7 Site: ACMW-14 SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 2012 To: 2018 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 77 94 1.25 1.95 1 < 1 First year of sampling 13 71 85 1.45 1.73 < 1 < 1 14 69 84 1.33 2.70 < 1 < 1 15 74 93 1.20 2.37 < 1 < 1 16 77 86 1.80 3.00 < 1 < 1 17 130 145 3.16 3.64 12 < 1 18 75 72 1.03 2.38 124 < 1 Maximum 130 145 3.16 3.64 124 < 1 Minimum 69 72 1.03 1.73 < 1 < 1 Average 82 94 1.60 2.54 20 < 1 #Tests 7 7 7 0 7 0 7 7 0 Site ACMW-14 ,_ Nitrate-Nitrogen &Water Level Chlorides 10 - - 5545 50 - 8 5540 40 6 i 5535 a; 30 A _ IR E 4 - 5530 2 20 25525 10 _ J=�1 0 - -. r ------_- 5520 0 12 13 14 15 16 17 18 12 13 14 15 16 17 18 —+—Nitrate --.—Water Level Linear(Nitrate) —.--Chloride Linear(Chloride) Total Dissolved Solids (TDS) ' Total Phosphorus 500 0.4 - 400 = - 0.3 - - 300 J - J 0.2 -_ a 'a E - E - 200 - 100 — 0.1 = - • 12 13 14 15 16 17 18 12 13 14 15 16 17 18 —•--TDS Linear(TDS) —+—Total P Linear(Total P) Annual Metal Report ACMW-14 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/19/2012 9.04 0.545 2.52 5.82 <10 23.9 <1 41.8 <1 <0.5 <1 <20 8/1/2014 9.11 <1 2.87 5.82 <0.5 76.7 1.58 47.7 <1 <0.5 <1 <2 6/11/2015 8.98 <1 2.80 6.15 <0.5 98.7 1.67 43.8 <1 <0.5 <1 <2 8/16/2016 7.86 <1 2.53 5.03 <0.5 181 <1 44.8 <1 <0.5 <1 <2 6/8/2017 15.9 <1 5.24 6.48 <0.5 804 <1 105 <1 <0.5 1.44 <2 9/18/2018 7.27 <1 2.30 4.96 <0.5 971 <1 47.4 <1 <0.5 <1 <2 Fe Hg Mn Mo Ni Pb Sb Se 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 6/19/2012 62.4 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 8/1/2014 268 <0.2 5.17 <2 <5 <0.5 <1 <5 <1 <3 <20 6/11/2015 182 <0.2 5.27 <2 <5 <0.5 <1 <5 <1 <3 <20 8/16/2016 216 <0.2 4.82 <2 <5 <0.5 <1 <5 <1 <3 <20 6/8/2017 1380 <0.2 24.4 <2 <5 <0.5 <1 <5 <1 3.1 <20 9/18/2018 803 <0.2 9.09 <2 <5 <0.5 <1 <5 <1 Site: ACMW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 02/06/2018 23.40 5477.20 13.1 6.03 31.0 0.029 < 0.100 < 0.020 < 0.040 0.58 0.58 06/22/2018 10.23 5490.37 14.2 6.16 30.1 0.037 0.071 < 0.020 < 0.010 0.05 0.12 09/20/2018 11.92 5488.68 16.6 6.45 30.0 0.039 < •0.050 < 0.020 < 0.020 0.33 0.33 12/11/2018 21.14 5479.46 15.5 5.97 29.7 0.027 0.073 < 0.020 < 0.010 0.48 0.56 Maximum 23.40 5490.37 16.6 6.45 31.0 0.039 0.100 < 0.020 < 0.040 0.58 0.58 Minimum 10.23 5477.20 13.1 5.97 29.7 0.027 < 0.050 < 0.020 < 0.010 0.05 0.12 Average 16.67 5483.93 14.9 6.15 30.2 0.033 0.074 < 0.020 < 0.020 0.36 0.40 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA - 2018 Total Coli E. coli Fecal TDS EC Chloride COD SO4 Color Chromo Chromo Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 02/06/2018 57 70.8 < 2.00 < 2.00 < 1 < 1 06/22/2018 56 63.6 0.68 1.08 2 1 09/20/2018 51 69.3 < 1.00 1.10 2 < 1 12/11/2018 54 71.0 1.16 1.64 < 1 < 1 Maximum 57 71.0 2.00 2.00 2 1 Minimum 51 63.6 < 0.68 1.08 < 1 < 1 Average 55 68.7 1.21 1.46 2 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA - From: 2012 To: 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 23.6 5477.0 12.3 5.97 31 4.60 0.042 0.055 0.024 < 0.010 0.659 0.724 13 23.7 5476.9 12.2 6.12 • 28 0.042 0.088 0.032. < 0.012 0.934 1.018 14 25.6 5475.0 13.1 6.11 27 0.037 0.055 0.022 < 0.013 1.160 1.185 15 27.8 5472.8 12.7 6.06 27 0.024 0.059 < 0.020 < 0.017 1.557 1.610 16 15.8 5484.8 13.6 5.94 25 0.028 0.335 < 0.020 < 0.058 6.105 6.423 17 12.0 5488.6 _13.7 6.19 28 0.031 0.105 < 0.020 < 0.013 0.673 0.705 18 16.7 5483.9 14.9 6.15 30 0.033 0.074 < 0.020 < 0.020 0.360 0.396 Maximum 27.8 5488.6 14.9 6.19 31 4.60 0.042 0.335 0.032 0.058 6.105 6.423 . Minimum 12.0 5472.8 12.2 5.94 25 4.60 0.024 < 0.055 0.020 < 0.010 0.360 0.396 Average 20.7 5479.9 13.2 6.08 28 4.60 0.034 0.110 0.023 0.020 1.635 1.723 #Tests 7 7 7 7 7 0 1 7 7 7 7 7 7 , Site: ACMW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT ,PINE COUNTY GROUNDWATER QUALITY DA From 2012 To: 2018 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 65 73 1.46 1.82 < 1 < 1 First year of sampling 13 65 72 1.62 1.78 < 1 < 1 14 61 72 1.58 1.82 < 1 < 1 15 68 86 1.64 1.81 < 1 < s1 16 99 114 3.09 3.18 3 < 1 17 . 56 70 0.81 1.76 3 < 1 18 55 69 1.21 1.46 2 < 1 Maximum 99 114 3.09 3.18 < - 3 < 1 Minimum 55 69 0.81 1.46 < 1 < 1 Average 67 80 1.63 1.95 < 2 < 1 #Tests 7 7 7 0 7 0 7 7 0 Site ACMW-15 , Nitrate-Nitrogen &Water Level Chlorides 10 - - 5490 20 8 5485 - 15 6IL''''''..11\\I _ 5480 - J J Of • 10ti E . 4 - 5475 . - 5 2 - 5470 - 0 ,- 5465 0 , 12 13 14 15 16 17 18 12 13 14 15 16 17 18 —•—Nitrate --2—Water Level Linear(Nitrate) —.--Chloride Linear(Chloride) L Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 = - 0.3 - 300 = -J - J - E - E 200 100 0.1 12 13 14 15 16 17 18 12 13 14 15 16 17 18 —0—TDS Linear(TDS) —0—Total P Linear(Total P) Annual Metal Report ACMW-15 Diamond Valley Ranch • Ca K Mg Na Ag Al As Ba Be Cd Cr Cu mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/19/2012 7.63 1.17 1.72 4.4 <10 561 <1 38.2 <1 <0.5 <1 <20 6/12/2013 6.41 1.20 1.59 4.1 6/5/2014 7.08 1.15 1.67 4.4 <0.5 69.8 <1 30.6 <1 <0.5 <1 <2 6/2/2015 7.49 1.08 1.75 4.2 <0.5 35 <1 34 <1 <0.5 <1 <2 8/30/2016 11.1 1.59 2.56 5.0 <0.5 22.3 <1 42.4 <1 <0.5 <1 <2 6/20/2017 6.60 <1 1.57 3.9 <0.5 152 <1 22.5 <1 <0.5 <1 <2 9/20/2018 7.25 <1 1.68 3.6 <0.5 67.3 <1 29.3 <1 <0.5 <1 <2 Fe Hg Mn Mo Ni Pb Sb Se 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 6/19/2012 376 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/12/2013 6/5/2014 67.6 <0.2 3.52 <2 <5 <0.5 <1 <5 <1 <3 <20 6/2/2015 46.2 <0.2 2.15 <2 <5 <0.5 <1 <5 <1 <3 <20 8/30/2016 21.3 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/20/2017 152 <0.2 3.62 <2 <5 <0.5 <1 <5 <1 <3 <20 9/20/2018 35.1 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 02/06/2018 14.00 5470.53 11.5 6.34. ' 56.5 0.048 < 0.100 < 0.020 < 0.020 1.63 1.63 06/22/2018 9.74 5474.79 13.8 6.08 51.1 0.045 0.097 < 0.020 < 0.010 0.27 0.37 09/20/2018 8.64 5475.89 16.6 6.71 56.4 0.053 < 0.050 < 0.020 < 0.020 0.65 0.66 12/11/2018 12.48 5472.05 14.1 6.26 54.1 0.043 0.085 < 0.020 < 0.010 0.30 0.39 Maximum 14.00 5475.89 16.6 6.71 56.5 0.053 0.100 < 0.020 < 0.020 1.63 1.63 Minimum 8.64 5470.53 11.5 6.08 51.1 0.043 < 0.050 < 0.020 < 0.010 0.27 0.37 Average 11.22 5473.32 14.0 6.35 54.5 0.047 0.083 < 0.020 < 0.015 0.71 0.76 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 i Site: ACMW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Total Coli E. coli Fecal TDS EC Chloride COD SO4 Color Chromo Chromo Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 02/06/2018 96 133 2.04 1.84 < 1 < 1 06/22/2018 84 106 0.80- 2.32 < 1 < 1 09/20/2018 86 -126 1.10 1.50 < 1 < 1 12/11/2018 79 120 1.26 1.67 < 1 < 1 Maximum 96 133 2.04 2.32 < 1 < 1 Minimum 79 106 0.80 1.50 < 1 < 1 Average 86 121 1.30 1.83 < 1 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N . NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 17.1 5467.4 11.6 6.24 66 5.60 0.156 0.061 0.024 < 0.010 0.403 0.474 13 16.6 5468.0 11.7 6.43 75 0.118 0.069 0.029 < 0.012 0.310 0.356 14 15.2 5469.3 11.9 6.41 52 0.071 0.188 0.023 < 0.010 2.128 2.290 15 18.0 5466.6 12.1 6.41 53 0.061 0.060 < 0.020 < 0.013 0.776 0.795 16 11.8 5472.8 12.7 6.26 42 0.051 0.683 < 0.020 < 0.055 7.130 7.813 17 9.5 5475.0 12.7 6.38 53 0.056 0.133 < 0.020 < 0.013 1.408 1.445 18 11.2 5473.3 14.0 6.35 55 0.047 0.083 < 0.020 < 0.015 0.712 0.760 r Maximum 18.0 5475.0 14.0 6.43 75 5.60 0.156 0.683 0.029 0.055 7.130 7.813 Minimum 9.5 5466.6 11.6 6.24 42 5.60 0.047 < 0.060 0.020 < 0.010 0.310 0.356 Average 14.2 5470.3 12.4 6.35 56 5.60 0.080 0.182 0.022 0.018 1.838 1.990 #Tests 7 7 7 7 7 0 1 7 7 7 7 7 7 Site: ACMW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 2012 To: 2018 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units. MPN MPN MPN Comments 12 116 135 3.46 1.33 2 < 1 First year of sampling 13 128 156 3.55 0.82 1 < 1 14 109 132 3.64 1.26 1 < 1 15 98 128 2.38 1.32 1 < 1 16 133 163 3.62 3.99 9 < 1 17 93 132 1.43 3.36 4 < 1 18 86 121 1.30 1.83 < 1 < 1 Maximum 133 163 3.64 3.99 9 < 1 Minimum 86 121 1.30 0.82 < 1 < 1 Average 109 138 2.77 1.99 3 < 1 #Tests 7 7 7 0 7 0 7 7 0 Site ACMW-16 Nitrate-Nitrogen &Water Level Chlorides 10 - 5485 40 _ 8 - - 5480 30 6 - 5475 t C1 - _ J J E 20 _ )1:01 4 - 5470 1 10 2411101W5465 0 - - --- 5460 0 12 13 14 15 16 17 18 12 13 14 15 16 17 18 —4--Nitrate --u—Water Level Linear(Nitrate) Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 0.3 300 - 200 - 100 - 0.1 0 0.0 12 13 14 15 16 17 18 12 13 14 15 16 17 18 ---•--TDS Linear(TDS) —.—Total P Linear(Total P) Annual Metal Report ACMW-16 Diamond Valley Ranch Ca K Mg Na Ag AI As Ba Be 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 6/19/2012 14.1 1.40 3.79 7.11 <10 849 <1 39.8 <1 <0.5 <1 <20 6/12/2013 16.1 1.21 4.15 7.97 6/5/2014 14.2 1.68 4.33 7.01 <0.5 109 1.88 42 <1 <0.5 <1 <2 6/2/2015 13.2 1.21 4.00 6.89 <0.5 212 2.1 27.6 <1 <0.5 <1 <2 8/30/2016 15.0 3.83 4.12 7.50 <0.5 62.7 <1 80 <1 <0.5 <1 <2 6/20/2017 11.7 3.68 3.35 5.68 <0.5 151 <1 58.2 <1 <0.5 <1 <2 9/20/2018 12.1 4.04 3.29 6.22 <0.5 120 <1 82.5 <1 <0.5 <1 <2 Fe Hg Mn Mo Ni Pb Sb Se 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 6/19/2012 830 <0.2 22.5 <2 <5 <2.5 <1 <5 <1 <3 <10 6/12/2013 6/5/2014 466 <0.2 3.88 <2 <5 <0.5 <1 <5 <1 <3 <20 6/2/2015 41.6 <0.2 4.35 <2 <5 <0.5 <1 <5 <1 <3 <20 8/30/2016 56.4 <0.2 2.06 <2 <5 <0.5 <1 <5 <1 <3 <20 6/20/2017 50.3 • <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 9/20/2018 68.0 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 02/06/2018 17.08 5487.84 10.3 6.34 40.3 0.027 < 0.100 < 0.020 < 0.010 0.926 0.926 06/22/2018 7.77 5497.15 12.0 6.47 35.0 0.026 0.106 < 0.020 < 0.010 0.746 0.852 09/20/2018 14.01 5490.91 13.0 6.64 33.2 0.030 < 0.050 < 0.020 < 0.020 0.486 0.477 12/11/2018 15.40 5489.52 11.2 6.25 31.1 0.032 0.090 < 0.020 < 0.010 0.310 0.400 Maximum 17.08 5497.15 13.0 6.64 40.3 0.032 0.106 < 0.020 < 0.020 0.926 0.926 Minimum 7.77 5487.84 10.3 6.25 31.1 0.026 < 0.050 < 0.020 < 0.010 0.310 0.400 Average 13.57 5491.36 11.6 6.43 34.9 0.029 0.087 < 0.020 < 0.013 0.617 0.664 #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 2018 Total Coli E. coli Fecal TDS EC Chloride COD SO4 Color Chromo Chromo Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 02/06/2018 75 101 2.76 2.82 < 1 < 1 06/22/2018 68 88 2.06 2.52 < 1 < 1 09/20/2018 62 84 1.40 1.80 < 1 < 1 12/11/2018 61 80 2.04 2.22 < 1 < 1 Maximum 75 101 2.76 2.82 < 1 < 1 Minimum 61 80 1.40 1.80 < 1 < 1 Average 67 88 2.07 2.34 < 1 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 17.5 5487.4 11.8 6.20 41 2.8 0.031 < 0.050 0.023 < 0.017 1.449 1.516 13 15.2 5489.7 10.9 6.40 39 0.054 < 0.055 0.030 < 0.018 1.395 1.429 14 11.5 5493.4 11.9 6.38 36 0.037 < 0.050 0.022 < 0.010 0.864 0.880 15 17.3 5487.6 11.0 6.30 36 0.025 < 0.050 < 0.020 < 0.013 0.450 0.455 16 11.0 5493.9 12.2 6.22 35 0.027 < 0.105 < 0.074 < 0.025 1.033 1.032 17 9.5 5495.4 11.1 6.30 34 0.030 0.090 < 0.020 < 0.010 0.924 0.867 18 13.6 5491.4 11.6 6.43 35 0.029 0.087 < 0.020 < 0.013 0.617 0.664 Maximum 17.5 5495.4 12.2 6.43 41 2.8 0.054 0.105 0.074 0.025 1.449 1.516 Minimum 9.5 5487.4 10.9 6.20 34 2.8 0.025 < 0.050 0.020 < 0.010 0.450 0.455 Average 13.7 5491.3 11.5 6.32 36 2.8 0.033 0.070 0.030 0.015 0.962 0.977 #Tests 7 7 7 7 7 0 1 7 7 7 7 7 7 Site: ACMW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 2012 r To: 2018 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli. Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 78 105 2.25 2.26 1 < 1 First year of sampling 13 79 100 2.17 2.44 1 < 1 14 72 87 1.65 2.79 ' 1 < 1 15 70 90 1.59 2.82 1 < 1 16 77 91 1.73 3.00 < 1 < 1 - 17 72 89 1.78 3.33 < 1 < 1 18 67 88 2.07 2.34 < 1 < 1 Maximum 79 105 2.25 3.33 1 < 1 Minimum 67 87 1.59 < 2.26 < 1 < 1 Average 73 93 1.89 2.71 1 < 1 #Tests 7 7 7 0 7 0 7 7 0 Site ACMW-17 Nitrate-Nitrogen &Water Level Chlorides 5 — 5500 40 4 5495 = 30 3 - - 5490 —_ a, J = _ _„ 20 2 5485 2 10 1 - �� - 5480 0 - - 5475 0 12 13 14 15 16 17 18 12 13 14 15 16 17 18 —+—Nitrate —E—Water Level Linear(Nitrate) —•—Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus -- 500 0.4 400 = 0.3 - 300 = CM - o) 0.2 E - E 200 0.1 - 100 - 4 ♦ 4 ♦ 4.•-�.y = -....- r ♦ -4 . 0 - 0.0 12 13 14 15 16 17 18 12 13 14 15 16 17 18 —.—TDS Linear(TDS) --..--Total P Linear(Total P) Annual Metal Report ACMW-17 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/19/2012 • 10.3 1.59 2.77 5.56 <10 199 <1 28 <1 <0.5 <1 <20 6/12/2013 9.15 1.65 2.25 5.25 6/5/2014 8.40 1.35 2.53 4.72 <0.5 86.2 1.12 24.1 <1 <0.5 <1 <2 6/2/2015 7.69 1.06 2.23 4.28 <0.5 27.8 <1 20.8 <1 <0.5 <1 <2 8/30/2016 8.50 1.54 2.36 4.99 <0.5 <20 <1 23.4 <1 <0.5 <1 <2 6/20/2017 8.08 1.11 2.35 4.60 <0.5 <20 <1 18.3 <1 <0.5 <1 <2 9/20/2018 8.15 1.00 2.25 4.58 <0.5 <20 <1 20.5 <1 <0.5 <1 <2 Fe Hg Mn Mo Ni Pb Sb Se 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 6/19/2012 149 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/12/2013 6/5/2014 327 <0.2 6.29 <2 <5 <0.5 <1 <5 <1 <3 <20 6/2/2015 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/30/2016 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/20/2017 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 9/20/2018 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-18 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 02/06/2018 9.00 5461.56 11.2 6.51 34.9 0.033 0.170 < 0.020 < 0.010 0.527 0.527 06/22/2018 7.68 5462.88 14.9 6.46 31.3 0.033 < 0.050 < 0.020 < 0.010 0.801 0.892 09/20/2018 8.52 5462.04 13.7 6.29 33.2 0.032 < 0.120 < 0.020 < 0.010 0.586 0.580 12/11/2018 9.00 5461.56 11.9 6.27 34.8 0.029 < 0.120 < 0.020 < 0.010 0.463 0.547 • Maximum 9.00 5462.88 14.9 6.51 34.9 0.033 0.170 < 0.020 < 0.010 0.801 0.892 Minimum 7.68 5461.56 11.2 6.27 31.3 0.029 < 0.050 < 0.020 < 0.010 0.463 0.527 Average 8.55 5462.01 12.9 6.38 33.6 0.032 0.115 < 0.020 < 0.010 0.594 0.637 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 • Site: ACMW-18 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Total Coli E. coli Fecal TDS EC Chloride COD SO4 Color Chromo Chromo Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 02/06/2018 59 79.7 1.23 2.37 3.1 < 1 06/22/2018 61 76.1 1.23 2.32 < 1 < 1 09/20/2018 58 81.1 < 1.00 1.80 32.7 < 1 12/11/2018 55 85.0 1.62 2.10 4.1 < 1 Maximum 61 85.0 1.62 2.37 32.7 < 1 Minimum 55 76.1 < 1.00 1.80 < 1 < 1 Average 58 80.5 1.27 2.15 10 < 1 #Tests 4 4 4 0 4 0 4 4 0 C Site: ACMW-18 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 11.3 5459.2 12.6 6.18 37 5.20 0.037 0.135 0.023 < 0.010 0.940 1.085 13 10.2 5460.3 11.9 6.51 36 0.049 0.052 0.028 < 0.015 1.023 1.041 14 8.5 5462.1 12.9 6.48 33 0.031 0.061 0.021 < 0.015 1.500 1.558 15 10.3 5460.3 12.9 6.43 37 0.031 < 0.050 < 0.020 < 0.013 0.401 0.413. 16 8.2 5462.3 12.4 6.40 30 0.030 0.203 < 0.020 < 0.035 2.545 2.710 17 6.8 5463.8 12.6 6.58 27 0.031 0.115 < 0.020 < 0.018 1.949 1.937 18 8.6 5462.0 12.9 6.38 34 0.032 0.115 < 0.020 < 0.010 0.594 0.637 Maximum 11.3 5463.8 12.9 6.58 37 5.20 0.049 0.203 0.028 0.035 2.545 2.710 Minimum 6.8 5459.2 11.9 6.18 27 5.20 0.030 0.050 0.020 < 0.010 0.401 0.413 Average 9.1 5461.4 12.6 6.42 33 5.20 0.034_ 0.104 0.022 0.016 1.279 1.340 #Tests 7 7 7 7 7 0 1 7 7 7 7 7 7 Site: ACMW-18 SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 2012 , To: 2018 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 64 86 1.47 2.23 2 < 1 First year of sampling 13 67 89 1.87 2.27 < 1 < 1 14 67 85 1.62 2.45 1 < 1 15 63 91 1.49 2.50 3 < 1 16 72 91 1.89 2.60 4 < 1 17 64 81 1.09 3.34 1 < 1 18 58 80 1.27 2.15 10 < 1 Maximum 72 91 1.89 3.34 10 < 1 Minimum 58 80 1.09 2.15 < 1 < 1 Average 65 86 1.53 2.51 3 < 1 #Tests 7 7 7 0 7 0 7 7 0 Site ACMW-18 Nitrate-Nitrogen &Water Level Chlorides 5 5475 40 4 5470 30 3 - - 5465 m E 20 E 2 - /Id - 5460 ° _ 10 - 5455 0 - - 5450 0 12 13 14 15 16 17 18 12 13 r 14 15 16 17 18 —.—Nitrate --.—Water Level Linear(Nitrate) —s--Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 = 0.3 300 -8) E _ 0.2 200 0.1 - 100 0 0.0 12 13 14 15 16 17 18 12 13 - 14 15 16 17 18 -�-TDS Linear(TDS) --+—Total P Linear(Total P) Annual Metal Report ACMW-18 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/19/2012 9.3 1.05 2.38 3.74 <10 433 <1 22 <1 <0.5 <1 <20 6/12/2013 9.07 0.984 2.51 3.72 6/5/2014 10.8 1.15 2.87 4.39 <0.5 <20 <1 20.3 <1 <0.5 <1 <2 6/2/2015 10.1 1.61 3.35 4.15 <0.5 2450 2.12 44 <1 <0.5 5.22 2.66 8/30/2016 8.37 1.08 2.19 3.69 <0.5 36.3 <1 16.6 <1 <0.5 <1 <2 6/20/2017 7.46 <1 2.02 3.38 <0.5 109 <1 14.1 <1 <0.5 <1 <2 9/20/2018 8.55 <1 2.22 3.75 <0.5 20 <1 16.7 <1 <0.5 <1 <2 Fe Hg Mn Mo Ni Pb Sb Se 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 6/19/2012 321 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/12/2013 6/5/2014 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/2/2015 3580 <0.2 76.2 1.95 <5 1.59 <1 <5 <1 5.49 <20 8/30/2016 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/20/2017 33.7 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 9/20/2018 <20 <0.2 2.4 2.04 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-19 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 02/06/2018 7.56 5409.69 12.0 6.80 104.0 0.091 0.166 0.046 < 0.010 < 0.010 < 0.1 06/22/2018 7.82 5409.43 14.7 6.70 104.0 0.093 0.142 0.050 < 0.010 < 0.010 0.190 09/20/2018 7.63 5409.62 15.1 6.52 107.0 0.101 0.210 0.038 < 0.020 < 0.005 0.115 12/11/2018 7.25 5410.00 12.6 6.55 102.0 0.126 0.180 0.039 < 0.010 0.011 0.195 Maximum 7.82 5410.00 15.1 6.80 107.0 0.126 0.210 0.050 < 0.020 0.011 0.195 Minimum 7.25 5409.43 12.0 6.52 102.0 0.091 0.142 0.038 < 0.010 < 0.005 < 0.100 Average 7.57 5409.69 13.6 6.64 104.3 0.103 0.175 0.043 < 0.013 0.009 0.150 #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 2018 Total Coli E. coli Fecal TDS EC Chloride COD SO4 Color Chromo Chromo Strep Date mg/L umhos mg/L mg/L mg/L. Units MPN MPN MPN Comments 02/06/2018 138 221 5.75 3.10 < 1 < 1 06/22/2018 134 213 5.44 2.77 < 1 < 1 09/20/2018 135 215 3.0 1.1 < 1 < 1 12/11/2018 131 213 3.14 1.34 < 1 < 1 Maximum 138 221 5.75 3.10 < 1 < 1 Minimum 131 213 3.00 1.10 < 1 < 1 Average 135 216 4.33 2.08 < 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: 2018 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 7.4 5409.9 12.9 6.75 106 6.70 0.092 0.106 0.050 < 0.010 0.010 0.126 13 7.1 5410.2 12.4 6.88 105 - 0.129 0.159 0.067 0.012 < 0.010 0.160 14 7.7 5409.6 12.5 6.80 129 0.111 0.121 0.041 0.010 < 0.010 0.123 15 8.3 5409.0 13.1 6.84 93 0.104 0.126 0.050 < 0.010 < 0.010 0.128 16 7.7- 5409.6 12.7 6.75 105 0.102 0.139 0.050 < 0.015 < 0.020 0.139 17 7.0 5410.3 12.8 6.91 91 0.100 0.175 0.050 < 0.010 < 0.010 0.175 18 7.6 5409.7 13.6 6.64 104 0.103 0.175 0.043 < 0.013 < 0.009 0.150 Maximum 8.3 5410.3 13.6 6.91 129 • 6.70 0.129 0.175 0.067 0.015 0.020 0.175 Minimum 7.0 5409.0 12.4 6.64 __ 91 6.70 0.092 < 0.106 0.041 < 0.010 < 0.009 0.123 Average 7.5 5409.7 12.9 6.80 105 6.70 0.106 0.143 0.050 0.011 0.011 0.143 #Tests 7 7 7 7 7 0 1 7 7 7 7 7 7 ,- Site: ACMW-19 SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 2012 To: 2018 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 144 221 2.81 2.87 2 < 1 First year of sampling 13 154 241 2.97 1.62 1 < 1 14 152 253 2.47 2.00 3 < 1 15 120 192 '2.46 2.29 < 1 < 1 16 138 213 3.47 2.91 6 < 1 17 155 238 14.32 8.17 1 < 1 18 135 216 4.33 2.08 < 1 < 1 Maximum 155 253 14.32 8.17 6 < 1 Minimum 120 192 2.46 1.62 < 1 < 1 Average 142 225 —4.69 3.13 2 < 1 . #Tests 7 7 7 0 7 0 7 7 0 r Site AC MW-1 9 Nitrate-Nitrogen &Water Level Chlorides 0.25 5425 40 0.20 5420 _ 30 - 0.15 5415 m = J d J _ -8) 20 - , E 0.10 —1 5410 _ _ 10 0.05 5405 - ♦ • • 1 • • - 0.00 -� 5400 0 12 13 14 15 16 17 18 12 13 14 15 16 17 18 —+--Nitrate —I—Water Level Linear(Nitrate) —0--Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 - 0.3 1 300 J J - E - E 0. 2 = 200 100 0 0.0F------= 12 13 14 15 16 17 18 12 13 14 15 16 17 18 —0—TDS Linear(TDS) -0—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 mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/19/2012 20.5 2.08 5.87 10.3 <10 358 1.2 32.8 <1 <0.5 <1 <20 6/12/2013 21.7 2.07 . 7.01 9.86 6/5/2014 31.8 2.35 10.1 10.1 <1 255 2.33 103 <2 <1 <2 <4 6/2/2015 18.4 1.44 5.77 7.06 <0.5 <20 <1 80 <1 <0.5 <1 <2 8/30/2016 23.9 2.14 7.21 8.44 <0.5 <20 <1 108 <1 <0.5 <1 <2 6/20/2017 25.8 1.73 8.08 9.10 <0.5 22.8 <1 108 <1 <0.5 <1 <2 9/20/2018 22.8 1.54 6.77 10.8 <0.5 <20 <1 106 <1 <0.5 <1 <2 Fe Hg Mn Mo Ni Pb Sb Se 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 6/19/2012 611 <0.2 1690 3.08 <5 <2.5 <1 <5 <1 <3 <10 6/12/2013 6/5/2014 750 <0.2 4980 <4 <10. <1 <2 <10 <2 <6 <40 6/2/2015 138 <0.2 2400 3.77 <5 <0.5 <1 <5 <1 <3 <20 8/30/2016 212 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/20/2917 232 <0.2 3380 2.44 <5 <0.5 <1 <5 <1 <3 <20 9/20/2018 176.0 <0.2 3140 3.52 <5 <0.5 <1 <5 <1 <3 <20 ALPINE COUNTY POTABLE WATER WELLS Site: GW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 03/20/18 8.4 6.24 58.8 0.044 < 0.100 < 0.020 < 0.030 4.41 4.41 05/17/18 12.3 5.85 60.6 0.038 0.29 < 0.020 < 0.010 3.85 4.14 09/18/18 14.4 6.17 61.1 0.038 0.22 < 0.020 < 0.005 3.5 3.72 11/21/18 9.6 6.42 60.6 0.032 0.22 < 0.020 < 0.010 4.11 4.33 Maximum 14.4 6.42 61.1 0.044 0.290 < 0.020 < 0.030 4.41 4.41 Minimum 8.4 5.85 58.8 0.032 < 0.100 < 0.020 < 0.005 3.50 3.72 Average 11.2 6.17 60.3 0.038 0.208 < 0.020 < 0.014 3.97 4.15 #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 From 1981 To: 2018 Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 81 12.0 6.59 48.0 0.10 0.040 0.177 0.040 0.940 1.120 82 9.8 6.40 47.0 0.040 0.070 0.010 - 0.960 1.030 83 11.1 6.60 49.0 91 1.50 0.040 0.063 0.020 < 0.010 0.840 0.860 84 12.0 6.41 52.0 88 0.22 0.040 0.108 0.040 < 0.010 0.710 0.830 85 11.5 6.60 55.0 89 0.22 0.034 0.083 0.034 < 0.010 0.808 0.901 86 11.3 6.71 55.0 92 0.32 0.030 0.078 0.028 < 0.010 0.861 0.949 87 11.6 6.63 55.0 97 0.21 0.032 0.086 < 0.020 < 0.010 0.970 1.316 88 11.5 6.51 56.0 111 0.25 0.030 0.105 0.029 < 0.010 1.002 1.117 89 11.1 6.49 55.0 112 0.25 0.028 0.099 0.037 < 0.010 1.036 1.145 90 11.5 6.74 53.0 126 0.15 0.042 0.097 < 0.020 < 0.010 1.324 1.431 91 11.1 6.93 55.0 133 0.19 0.033 0.094 0.031 0.010 1.421 1.525 92 11.9 6.75 55.0 132 0.28 0.031 0.087 0.024 0.012 1.578 1.678 93 10.6 6.86 56.0 123 0.13 0.031 0.113 0.030 0.012 1.962. 2.086 94 11.6 6.63 57.0 124 0.24 0.028 0.070 0.023 0.011 2.364 2.445 95 10.9 6.69 59.0 112 0.20 0.050 0.094 0.030 0.010 2.440 2.540 96 12.1 6.56 59.0 111 0.17 0.031 0.109 0.021 0.011 2.926 3.046 97 11.7 6.44 60.0 105 0.21 0.029 0.116 0.021 0.011 3.073 3.201 98 10.7 6.40 62.0 94 0.53 0.032 0.131 < 0.021 < 0.010 3.022 3.162 99 11.6 6.33 61.0 93 0.11 0.033 0.139 < 0.020 < 0.010 3.180 3.329 00 11.2 6.74 62.0 84 0.12 0:037 0.189 0.021 < 0.012 3.585 3.700 01 11.8- 6.48 62.0 83 0.15 0.033 0.100 < 0.020 < 0.028 3.388 3.480 02 11.6 6.54 62.0 78 0.02 0.030 0.113 - < 0.053 3.303 3.482 03 11.9 6.79 59.1 76 0.02 0.034 0.076 < 0.053 3.295 3.385 04 11.8 6.67 59.0 80 0.05 0.036 0.124 < 0.030 3.473 3.565 05 11.2 6.62 58.3 79 0.06 0.034 0.101 < 0.030 3.642 3.760 06 11.1 6.63 56.9 77 0.17 0.032 0.066 < 0.032 3.814 3.889 07 10.9 6.63 58.7 82 0.08 0.029 0.067 < 0.035 4.608 4.676 08 11.4 6.67 61.5 89 0.09 0.035 < 0.058 < 0.044 5.179 5.248 09 11.3 6.36 61.5 90 0.06 0.037 < 0.050 < 0.048 5.609 5.682 10 11.3 6.46 60.9 83 0.09 0.037 0.052 < 0.048 5.245 5.329 11 11.5 6.29 61.2 78 0.18 0.040 0.058 < 0.043- 4.522 4.545 12 12.3 6.46 62.7 83 0.09 0.037 0.184 < 0.020 < 0.049 4.673 4.822 13 11.6 6.39 62.6 0.039 0.127 0.026 < 0.042 4.864 4.857 14 12.1 6.42 61.8 0.036 0.358 0.025 < 0.040 4.565 4.868 15 12.3 6.45 61.0 0.042 0.108 < 0.020 < 0.040 4.735 4.703 16 11.5 6.48 61.5 0.043 0.255 < 0.020 < 0.050 4.185 4.360 17 12.2 6.49 60.0 0.038 0.300 0.023 < 0.038 3.833 4.058 18 11.2 6.17 60.3 0.038 0.208 < 0.020 < 0.014 3.968 4.150 Maximum 12.3 6.93 62.7 133 1.50 0.050 0.358 0.040 0.053 5.609 5.682 Minimum 9.8 6.17 47.0 76 0.02 0.028 0.050 0.010 < 0.01-0 0.710 0.830 Average 11.5 6.55 57.9 96 0.21 0.035 0.119 0.025 0.025 2.945 3.060 - #Tests 38 38 38 30 31 38 38 28 36 38 38 Site: GW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 1981 To: 2018 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 81 171 238 35.0 1 < 5 3.9 < 2.2 82 187 256 3 5.0 < 2.2 83 155 252 38.0 1 5 < 2.2 < 2.2 84 172 247 34.0 1 < 5 < 2.2 < 2.2 85 171 250 32.9 1 < 5 2.6 < 2.2 86 175 255 38.5 2 < 5 2.3 < 2.2 87 188 270 35.8 3 < 5 < 2.2 < 2.2 88 208 310 41.6 5 < 5 < 2.2 < 2.2 89 213 316 42.4 5 < 5 < 2.0 < 2.0 90 233 348 48.2 < 5 < 5 < 2.0 < 2.0 91 251 357 50.8 5 < 5 3.2 < 2.0 92 250 366 49.9 < 5 < 5 3.2 < 2.0 93 245 356 44.6 < 5 < 5 2.3 < 2.0 94 240 365 49.8 < 5 4 4.6 < 2.0 95 222 336 40.0 7 < 5 2.0 < 2.0 96 209 326 37.8 2 5 3.0 1.2 97 194 304 33.9 4 5 1.6 1.0 98 186 291 30.1 < 5 < 5 < 1.1 < 1.1 99 181 279 26.6 < 5 < 5 1.6 1.1 00 174 268 23.6 < 5 10.8 < 5 < 1.1 < 1.1 01 167 256 23.6 < 5 13.1 < 5 1.1 1.1 02 166 251 22.8 < 5 12.2 < 5 < 1.1 < 1.1 03 164 245 24.4 6 11.8 < 5 < 1.1 < 1.1 04 168 252 26.3 < 5 11.7 < 5 < 1.1 < 1.1 _ 05 172 238 28.1 < 5 11.8 < 5 < 1.1 < 1.1 06 174 241 29.5 < 6 11.3 < 5 < 1.1 < 1.1 07 189 281 32.9 < 5 11.8 5 < 1.1 < 1.1 08 195 308 34.3 < 5- 12.1 5 < 1.1 < 1.1 09 197 305 34.2 < 5 11.9 5 < 1.1 < 1.1 10 195 296 31.3 11 12.4 < 5 < 1.1 < 1.1 11 183 280 27.7 6 11.8 < 5 < 1.1 < 1.1 12 183 278 28.2 11.7 < 5 < 1.1 < 1.1 13 188 285 29.0 11.5 < 1.1 < 1.1 14 184 283 28.3 11.2 < 1.1 < 1.1 15 187 287 29.6 11.9 7.3 < 1.0 16 178 277 27.3 11.0 < 1.0 < 1.0 17 169 252 23.5 10.1 . < 1.0 < 1.0 18 173 266 25.4 9.8 < 1.0 < 1.0 Maximum 251 366 50.8 11 13.1 5 7.3 2.2 Minimum 155 238 22.8 1 9.8 4 < 1.0 1.0 Average 191 286 33.5 4 11.6 5 2.0 1.5 #Tests 38 38 37 31 19 31 38 38 0 Site GW-05 Nitrate-Nitrogen Chlorides 10 _ 100 _ 9 - 90 8 - 80 7 : 70 6 = 60 'v) 5 E _ E 50 4 - 40 3 1 - 30 -1 -rk. --� 2 20 1 - 10 -_ O 0 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 0708 09 10 11 12 13 14 15 16 17 18 —+—Nitrate Linear(Nitrate) —.—Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Coliform Bacteria 500 - 25 - 400 20 300 E 15 200 � za 10 2 100 0 p - 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 --♦—TDS Linear(TDS) t Total Coliforms Linear(Total Coliforms) Annual Metal Report GW-05 Neddenriep Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 7/20/1988 27 3.9 8.6 9.8 <10 <4 64 <0.1 <10 <20 <30 0.2 <10 <1 <1 10 11/21/1989 30.1 4.5 3.8 12.2 <10 <100 <10 <100 <1 <10 <50 540 <1 <10 <10 <5 <50 7/5/1990 27.7 5.3 10.2 14.7 <10 <100 <10 <100 <1 <10 <50 <100 <1 <10 <10 <5 66 8/13/1991 33 4.3 12 13 <10 <50 <4 71 <0.1 <10 <20 <30 <0.2 <10 <1 <1 <10 6/8/1992 34 4 10 13 <10 <50 <4 72 <0.1 <10 <20 <30 <0.2 <10 <1 <1 <10 7/12/1994 31 3.8 9.6 16 <10 <50 <2 68 <0.1 <10 <20 <30 <0.2 <5 <1 <1 <5 11/1/1995 28 4.1 8.4 16 <10 <50 <1 66 <0.1 <10 <10 <30 <0.2 <5 <1 <1 <5 6/11/1996 28 3.5 8.4 15 <10 72 <1 64 <0.1 <10 <10 <30 <0.2 <5 <1 <1 <5 6/10/1997 28 4.4 9.3 17 <10 <25 <2 58 <0.5 <10 <25 <50 <0.5 <10 <5 <5 <50 6/9/1998 21 3.47 7.89 15.7 <10 <25 <2 <100 <0.5 <10 <20 <30 <0.5 <20 <2.5 <5 17.7 7/6/1999 22.9 3.72 7.55 15.9 <10 <50 <2 <100 <1 <0.1 <10 <20 <50 <0.2 <20 <5 <2.5 <3 <1 <1 <10 6/1/2000 21.2 3.46 7.20 14 <10 <2 <100 <20 <50 <20 <2.5 <10 6/11/2001 19.9 3.54 6.16 15.8 22.9 <2 <100 <20 <50 20.5 <2.5 <10 6/11/2002 19.1 3.50 6.26 16.4 <10 <10 <2 <100 <0.2 <0.2 <1 22.4 <50 <0.01 <20 <1 <2.5 <1 <2 <0.2 47.7 6/10/2003 20.2 3.43 6.41 16.2 <10 <10 <2 <100 <0.2 <0.2 <1 <20 <50 0.01 <20 <1 <2.5 <1 <2 <0.2 73.7 6/8/2004 18.3 3.51 6.26 16.1 <10 <10 <2 <100 <0.2 <0.2 <1 <20 <50 0.01 <20 <1 <2.5 <1 <2 <0.2 37.7 6/1/2005 19.1 3.40 6.27 16.6 <10 3.7 <100 <20 <50 <2.5 82.5 6/7/2006 19.0 3.55 6.56 18.9 <10 <50 <2 <2 <2 <2 <20 <50 <0.2 <20 <2 <2 <2.5 <2 <10 <1 2 60.6 6/12/2007 21.6 3.66 6.90 19.7 13.8 <20 <2 180 <1 <0.5 <1 <20 <50 <0.2 <20 <2 <5 <2.5 <1 <5 <1 5.1 72.2 6/18/2008 24.1 4.02 7.04 20.5 <10 <20 <2 53 <1 <0.5 <1 <20 <50 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 68.4 6/9/2009 23.2 3.90 7.34 22.6 <10 <20 <2 55 <1 <0.5 <1 <20 <50 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 55.6 6/8/2010 23.0 3.50 7.30 21.00 <0.5 <20 <1 55 <1 <0.5 <1 3.4 <20 <0.2 2 <2 <5 <0.5 <1 <5 <1 <3 55 6/1/2011 21.1 3.67 7.25 22.2 <0.5 <20 <1 47.9 <1 <0.5 <1 2.56 <20 <0.2 <2 <2 <5 <0.5 <1 - <5 <1 <3 82.5 7/5/2012 17.3 3.62 6.12 20.4 <10 <20 <1 47.8 <1 <0.5 <1 <20 <50 <0.2 <20 <2 <5 <2.5 <1 <5 <1 44 6/11/2013 20.5 3.68 6.20 22.2 7/8/2014 20.8 3.65 6.64 23.7 <0.5 <20 <1 49 <1 <0.5 <1 2.41 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 3.38 43.5 8/18/2015 20.4 4.02 6.76 25.2 <0.5 <20 <1 49.1 <1 <0.5 <1 2.08 <20 <0.2 <2 <2 <5 0.521 <1 <5 <1 <3 77.9 8/16/2016 17.4 3.45 5.73 22.9 <0.5 <20 <1 46.4 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 1.65 <1 <5 <1 3.14 123 6/8/2017 15.8 3.19 5.38 20.6 <0.5 <20 <1 42.5 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 80 9/18/2018 17.5 3.07 5.45 22.0 <0.5 <20 <1 42.3 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 Site: GW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 03/20/18 8.5 6.01 48.2 0.044 0.20 < 0.020 < 0.060 6.90 7.10 05/17/18 14.0 5.51 48.9 0.041 0.20 < 0.020 < 0.010 6.35 6.55 09/18/18 16.5 6.00 49.1 0.047 0.12 < 0.020 < 0.005 7.24 7.36 11/21/18 14.1 6.16 49.4 0.047 < 0.050 < 0.020 < 0.010 7.26 7.10 Maximum 16.5 6.16 49.4 0.047 0.200 < 0.020 < 0.060 7.26 7.36 Minimum 8.5 5.51 48.2 0.041 < 0.050 < 0.020 < 0.005 6.35 6.55 ' Average 13.3 5.92 48.9 0.045 0.143 < 0.020 < 0.021 6.94 7.03 #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 From 1981 To: 2018 Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L m &L 81 11.4 6.42 39.0 0.80 0.040 0.116 0.020 1.280 1.340 82 9.5 6.30 42.0 0.060 0.134 0.020 1.790 1.920 83 9.9 6.42 48.0 99 1.32 0.030 0.063 0.020 < 0.010 1.530 1.600 84 11.2 6.38 49.0 88 1.69 0.090 0.138 0.030 < 0.010 1.240 1.390 85 10.0 6.50 46.0 84 0.81 0.049 0.107 0.028 < 0.010 1.081 1.198 86 10.9 6.48 47.0 106 1.50 0.039 0.090 0.020 < 0.010 1.313 1.413 87 12.7 6.56 45.0 100 1.67 0.055 0.141 < 0.021 < 0.010 1.340 1.844 88 13.9 6.57 45.0 102 1.40 0.039 0.152 0.030 < 0.010 1.536 1.698 89 10.9 6.54 46.0 121 5.22 0.081 0.104 0.024 < 0.010 2.638 2.752 90 12.0 6.79 48.0 103 2.38 0.045 0.102 0.020 < 0.010 3.414 3.525 91 11.7 7.01 52.0 86 0.95 0.074 0.125 0.033 < 0.010 2.937 3.072 92 12.1 6.76 54.0 85 0.31 0.038 0.121 0.023 0.010 3.711 3.842 93 11.8 6.95 57.0 72 0.73 0.041 0.125 0.024 0.011 4.054 4.189 94 11.7 6.78 57.0- 68 0.54 0.032 0.100 0.028 0.010 4.505 4.615 -95 12.2 6.66 58.0 60 2.32 0.050 0.090 0.030 0.010 5.500 5.600 96 13.3 6.52 59.0 58 1.09 0.057 0.207 0.020 0.011 6.526 6.743 97 11.6 6.51 58.0 59 0.51 0.048 0.139 0.020 0.011 6.586 6.738 98 11.5 6.48 57.0 46 1.31 0.048 0.163 < 0.021 < 0.010 4.617 4.791 99 12.0 6.35 51.0 42 0.54 0.044 0.111 < 0.020 < 0.010 3.996 4.117 00 12.1 6.77 52.0 48 1.40 0.073 0.198 0.021 < 0.012 5.176 5.295 01 12.5 6.47 50.0 48 3.43 0.073 0.125 0.028 < 0.033 5.142 5.246 02 11.9 6.54 49.0 55 0.36 0.058 0.212 < 0.051 6.282 6.645 03 12.4 7.06 47.6 49 36.70 0.077 0.084 < 0.045 5.266 5.383 04 13.0 6.70 50.1 53 4.92 0.113 0.149 < 0.043 5.715 5.872 05 12.3 6.53 49.5 60 2.65- 0.046 0.096 < 0.047 7.136 7.218 06 12.3 6.45 51.2 62 8.84 0.056 0.168' < 0.067 9.035 9.060 07 13.4 6.26 51.7 60 2.50 0.041 0.089 < 0.091 9.036 9.171 08 13.8 6.46 52.1 55 0.71 0.074 < 0.058 < 0.088 7.759 7.873 09 13.9 6.19 48.5 58 4.74 0.061 < 0.050 < 0.068 7.118 7.210 10 12.9 6.31 48.1 55 0.34 0.069 0.064 < 0.060 6.949 7.180 11 14.0 6.20 49.6 57 0.66 0.045 0.072 < 0.052 7.376 7.279 12 14.9 6.24 49.3 62 0.16 • 0.046 < 0.051 < 0.020 < 0.063 7.544 7.656 13 14.5 6.20 47.5 0.050 0.652 0.027 < 0.069 7.984 8.275 14 14.7 6.22 47.1 0.049 0.052 0.024 < 0.071 6.683 6.377 15 14.2 6.24 45.6 0.047 0.295 < 0.020 0.055 7.675 7.400 16 13.8 6.35 47.2 0.046 0.138 < 0.020 < 0.080 9.765 9.173 17 14.9 6.29 47.0 0.054 0.103 < 0.023 < 0.070 7.955 7.768 18 13.3 5.92 48.9 - 0.045 0.143 < 0.020 < 0.021 6.938 7.028 Maximum 14.9 7.06 59.0 121 36.70 0.113 0.652 0.033 0.091 9.765 9.173 Minimum 9.5 5.92 39.0 42 0.16 0.030 < 0.050 0.020 < 0.010 1.081 1.198 Average 12.5 6.48 49.7 70 2.98 0.055 0.135 0.023 0.035 5.161 5.250 #Tests 38 38 38 30 31 38 38 28 36 ,38 38 Site: GW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 1981 To: 2018- . Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 81 237 351 45.0 2 < - 5 5.6 < 2.2 82 206 326 3 7.7 < 2.2 83 188 303 44.0 2 < 5 13.2 6.8 90 84 177 285 41.0 2 < 5 14.5 2.1 7.1 85 180 286 41.5 1 < 5 2.7 < 2.2 < 2.2 86 227 350 51.6 2 < 5 < 2.2 < 2.2 < 2.2 87 211 344 45.6 3 < 5 < 2.2 < 2.2 < 2.2 88 221 365 51.3 6 < 5 5.1 < 2.2 89 242 389 54.0 5 < 5 < 2.0 < 2.0 90 234 379 48.2 < 5 < 5 3.9 < 2.0 91 210 343 43.7 < 5 < 5 4.5 < 2.0 92 214 364 48.7 < 5 < 5 3.4 < 2.0 93 203 336 , 37.5 13 < 5 3.8 < 2.0 94 193 319 39.1 < 5 4 4.3 < 2.0 95 181 303 33.0 6 5 5.8 < 2.0 96 189 298 29.7 2 5 12.7 1.2 97 181 291 28.6 4 5 1.7 1.0 98 162 255 23.7 < 5 < 5 5.2 < - 1.1 99 146 230 20.9 < 5 < 5 4.9 < 1.1 00 161 252 26.0 < 5 9.54 < 5 1.1 < 1.1 01 160 251 26.9 < 5 9.63 5 1.4 < 1.1 02 178 276 31.2 < 5 10.79 5 1.2 < 1.1 03 176 275 33.2 5 10.99 13 1.3 < 1.1 04 177 271 32.6 5 11.72 5 1.6 < 1.1 05 192 282 37.0 < 5 12.11 < 5 2.7 < 1.1 06 209 307 38.7 6 12.95 < 5 8.3 < 1.1 07 205 317 37.3 < 5 14.64 8 7.1 < 1.1 08 192 300 35.4 < 5 14.71 5 3.9 < 1.1 09 185 291 34.3 < 5 13.18 < 5 3.6 < 1.1 10 186 288 32.6 9 13.89 < 5 3.7 < 1.1 11 190 300 34.1 6 12.80 < 5 2.3 < 1.1 12 195 294 35.8 14.05 5 < 1.1 < 1.1 13 193 296 35.5 16.05 1.9 < 1.1 14 185 285 34.5 19.09 < 1.1 < 1.1 15 192 311 40.6 18.43 < 1.0 < 1.0 16 208 327 43.8 20.03 < 1.0 < 1.0 17 209 321 42.0 17.08 < 1.0 < 1.0 18 196 309 36.8 13.08 < 1.0 < 1.0 Maximum 242 389 54.0 13 20.03 13 14.5 6.8 90.0 Minimum 146 230 20.9 1 9.54 4 1.0 1.0 < 2.2 Average 194 307 37.7 5 13.93 5 4.0 1.6 20.7 #Tests 38 38 37 31 19 31 38 38 5 • Site GW-08 Nitrate-Nitrogen Chlorides 10 _ 100 9 = 90 = 8 -_ 80 -'f _ 7 = 70 6 Il 60 -_ J - J1 5 _ 50 _ ,..rive, 4 - 40 3 - 30 -= 49.4\.\(...",,,...., 2 - 20 111101 1 i 10 _- 0 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 0 ry 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 —i—Nitrate Linear(Nitrate) --r—Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Coliform Bacteria 500 - 25 400 20 300 E 15 - O - r_ 200 a 10 100 - - 5 wTrwir-----irk kish,. 81 82 83'84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 -- --TDS Linear(TDS) —f—Total Coliforms Linear(Total Coliforms) Annual Metal Report GW-08 Arant Ranch House Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 7/20/1988 23 4.2 7.8 25 <10 <4 58 <0.1 <10 <20 560 <0.2 37 <1 <1 20 11/21/1989 24.7 4.9 8.5 28.4 <10 <100 <10. <100 <1 <10 <50 <710 <1. <39 <10 <5 <50 7/5/1990 23.1 5.6 8.4 35.8 <10 <100 <10 <100 <1 <10 <50 230 <1 22 <10 <5' 64 8/13/1991 17 4 6.4 28 <10 <50 <4 46 <0.1 <10 26 76 <0.2 <10 2 <1 12 6/8/1992 26 4.5 8.5 46 <10 <50 <4 65 <0.1 <10 <20 67 <0.2 10 <1 <1 18 7/12/1994 16 3.3 5.2 32 <10 <50 <2 41 <0.1 <10 <20 <30 <0.2 <5 <1 <1 <5 11/1/1995 15 3.9 5.1 36 <10 <50 <1 48 <0.1 <10 71 470 0.5 8.2 <1 <1 58 6/11/1996 16 3.5 5.3 36 <10 81 <1 44 0.1 <10 67 2100 <0.2 14 7.9 <1 84 6/10/1997 15 4.2 5.5 38 <10 <25 <2 <50 <0.5 <10 40 82 <0.5 <10 <5 <5 <50 6/9/1998 11.1 2.96 3.42 30.8 <10 <25 <2 <100 <0.5 <10 90.2 903 <0.5 <20 <2.5 <5 46.6 7/6/1999 9.8 3.09 3.51 30.4 <10 <50 <2 <100 <1 <0.1 <10 <20 60.1 <0.2 <20 <5 <2.5 <3 <1 <1 13.2 6/1/2000 11.7 3.28 4.61 32.1 <10 <2 <100 67.5 90 <20 <2.5 17 6/11/2001 10.1 3.26 3.86 29.8 18.2 <2 <100 43.8 452 <20 <2.5 50.1 6/11/2002 13.2 3.64 4.60 36.4 <10 <10 <2 <100 <0.2 <0.2 <1 34 81.6 <0.01 <20 <1 <2.5 <1 <2 <0.2 <10 6/10/2003 12.7 3.44 4.35 33.1 <10 <10 <2 <100 <0.2 <0.2 <1 72.4 99.3 <0.01 <20 <1 <2.5 <1 <2 <0.2 12 6/8/2004 10.6 3.41 4.04 30 <10 <10 <2 <100 <0.2 <0.2 <1 59.5 279 0.02 <20 <1. <2.5 <1 <2 <0.2 <10 6/1/2005 12.1 3.51 4.05 33.7 <10 3.78 <100 244 1110 2.84 27.5 6/7/2006 16.4 4.14 5.95 37.9 <10 <50 <2 <2 <2 <2 182 314 <0.2 <20 <2 2 <2.5 <2 <10 <1 <2 20 6/12/2007 15.7 4.00 5.47 37.2 <10 <20 <2 47 <1 <0.5 <1 183 211 <0.2 31.4 <2 <5 <2.5 <1 <5 <1 <3 149 6/18/2008 16.4 4.12 5.02 35.7 <10 <20 <2 48 <1 <0.5 <1 <20 267 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 66.3 6/9/2009 14.0 3.79 4.80 33.7 <10 <20 <2 40 <1 <0.5 <1 21 105 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 18.3 6/8/2010 15.0 3.50 5.10 33.00 <0.5 <20 <1 41 <1 <0.5 <1 23 84 <0.2 2.1 <2 <5 1.1 <1 <5 <1 <3 <20 6/1/2011 15.6 3.75 5.77 37.5 <0.5 <20 <1 42.7 <1 <0.5 <1 77.8 490 <0.2 14 <2 <5 3.81 <1 <5 <1 <3 <20 7/5/2012 11.8 3.52 4.13 30.7 <10 <20 <1 34.8 <1 <0.5 <1 36.1 <50 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <10 6/11/2013 14.4 3.84 4.70 35.1 7/8/2014 14.1 3.72 4.91 35.8 <0.5 <20 1.14 38.3 <1 <0.5 <1 13.9 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 3.32 68.1 8/18/2015 13.8 3.61 4.92 33.9 <0.5 <20 <1 41 <1 <0.5 <1 13.8 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 76.1 8/16/2016 14.3 3.58 5.12 34.4 <0.5 <20 <1 39.8 <1 <0.5 <1 5.67 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 75.9 6/8/2017 14.4 3.67 5.31 35.7 <0.5 <20 <1 45.4 <1 <0.5 <1 16.9 23.8 <0.2 2.63 <2 <5 <0.5 <1 <5 <1 <3 32 9/18/2018 15.5 3.47 5.10 34.6 <0.5 <20 <1 46.5 <1 <0.5 <1 45.3 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 Site: GW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date C pH mg/L , mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 03/13/18 11.6 6.84 69.2 0.041 < 0.10 < 0.020 < 0.010 0.481 0.481 04/25/18 14.0 6.99 68.1 0.044 < 0.050 < 0.020 < 0.010 0.479 0.430 08/29/18 17.6 6.74 69.3 0.054 < 0.050 < 0.020 < 0.020 0.515 0.554 11/20/18 11.2 6.98 69.9 0.041 < 0.050 < 0.020 < 0.010 0.436 0.435 !' Maximum 17.6 6.99 69.9 0.054 < 0.100 < 0.020 < 0.020 0.515 0.554 Minimum 11.2 6.74 68.1 0.041 < 0.050 < 0.020 < 0.010 0.436 0.430 Average 13.6 6.89 69.1 0.045 < 0.063 < 0.020 < 0.013 0.478 0.475 #Tests 4 4 4 • 0 0 4 4 4 4 4 4 Site: GW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 1981 To: 2018 Temp _ Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 81 11.0 6.60 42.0 0.040 0.030 0.020 0.570 0.600 82 10.2 6.34 41.0 0.040 0.056 0.020 1.290 0.960 83 9.9 6.53 43.0 60 0.15 0.040 0.058 0.020 < 0.010 1.100 1.130 84 9.9 6.32 44.0 38 0.33 0.030 0.085 0.030 < 0.010 0.490 0.580 85 10.5 6.49 46.0 37 0.31 0.031 0.055 0.023 < _ 0.010 0.500 0.565 86 9.9 6.63 46.0 36 0.19 0.032 0.053 0.022 < 0.010 0.588 0.646 87 10.3 6.74 45.0 35 0.11 0.028 0.069 < 0.020 < 0.010 0.370 0.582 88 10.1 6.47 46.0 35 0.17 0.029 0.070 0.033 < 0.010 0.308 0.388 89 11.0 6.60 46.0 35 0.16 0.027 0.048 0.023 < 0.010 0.522 0.580 90 10.7 7.09 43.0 39 0.18 0.035 0.063 0.020 < 0.010 0.336 0.409 91 11.5 7.04 44.0 34 1.76 0.034 0.072 0.027 0.010 0.268 0.350 92 12.4 6.83 46.0 34 0.28 0.030 0.063 0.022 < 0.011 0.325 0.399 93 11.3 6.94 40.0 32 0.14 0.037 0.091 0.026 0.011 0.213 0.314 94 12.3 6.66 41.0 33 0.30 0.023 0.070 0.023 0.010 0.206 0.286 95 12.3 6.66 39.0 30 0.55 0.030 0.269 0.210 0.010 0.250 0.530 96 13.5 6.46 42.0 . 34 0.33 0.028 0.094 0.025 0.011 0.386 0.491 97 13.6 6.57 45.0 38 0.13 0.029 0.094 0.021 0.011 0.524 0.631 98 14.0 . 6.24 47.0 39 0.45 0.026 0.117 < 0.021 < 0.010 0.421 0.549 99 14.8 6.23 46.0 40 0.14 0.022 0.108 < 0.020 < 0.010 0.402 0.602 00 13.4 6.98 58.0 48 0.26 0.027 0.114 0.021 < 0.010 0.408 0.480 01 15.0 7.07_ 77.0 57 0.12 0.048 0.131 < 0.020 < 0.010 0.454 0.600 02 14.5 7.05 77.0 56 0.02 0.058 0.178 < 0.010 0.454 0.638 03 14.9 7.25 74.2 56 0.08 0.047 0.073 < 0.010 0.482 0.536 04 14.0 7.23 73.0 56 0.08 0.054 0.110 < 0.010 0.505 0.624 05 14.9 7.10 73.9 56 0.22 0.040 < 0.083 < 0.010 0.469 0.558 06 15.0 7.11 72.0 51 0.13 0.044 < 0.079 < 0.010 0.483 0.577 07 16.2 7.23 73.8 51 0.08 0.042 0.084 < 0.010 0.475 0.527 08 16.2 7.26 74.4 55 0.40 0.044 0.060 < 0.010 0.475 0.511 09 13.2 6.99 72.8 56 0.19 0.049 < 0.050 < 0.010 0.512 0.547 10 13.3 7.24 72.7 53 0.09 0.050 0.051 < 0.010 0.516 0.590 11 14.0 6.96 72.3 54 0.24 0.042 0.082 < 0.010 0.454 0.426 12 13.7 7.11 72.1 56 0.26 0.044 0.049 < 0.020 < 0.010 0.526 0.555 13 14.8 7.04 71.7 0.056 < 0.050 0.027 < 0.009 0.491 0.499 14 13.7 '7.00 70.9 0.047 0.056 0.027 0.010 0.503 0.496 15 13.5 6.97 71.2 0.047 < 0.050 < 0.020 < 0.010 0.520 0.514 16 14.5 6.76 70.9 0.053 < 0.063 < 0.020 < 0.010 0.477 0.480 17 14.5 7.19 71.7 0.056 < 0.075 < 0.020 < 0.010 0.472 0.402 18 13.6 6.89 69.1 0.045 < 0.063 < 0.020 < 0.013 0.478 0.475 Maximum 16.2 7.26 77.0 60 1.76 0.058 0.269 0.210 0.013 1.290 1.130 Minimum 9.9 6.23 39.0 30 0.02 0.022 0.030 0.020 0.009 0.206 0.286 Average 12.9 6.84 57.9 44 0.26 0.039 0.081 0.029 0.010 0.479 0.543 #Tests 38 38 38 30 30 38 38 28 36 38 38 Site: GW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 1981 To: 2018 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 81 82 90 ` < 1 < 2.2 < 2.2 82 81 106 1 < 2.2 < 2.2 83 60 99 3.000 2 8 < 2.2 < 2.2 84 65 96 2.000 1 < 5 < 2.2 < 2.2 85 68 96 1.500 1 < 5 < 2.2 < 2.2 86 67 96 1.400 1 < 5 < 2.2 < 2.2 87 73 92 1.100 3 < 5 < 2.2 < 2.2 88 74 96 1.100 5 < 5 < 2.2 < 2.2 89 71 95 1.200 6 < 5 < 2.0 < 2.0 90 79 94 1.000 < 5 < 5 < 2.0 < 2.0 , 91 75 94 1.000 < 5 < 5 < 2.0 < 2.0 92 -72 95 1.000 < 5 < 5 < 2.0 < 2.0 93 70 87 1.000 < 5 < 5 < 2.0 < 2.0 94 70 91 0.900 < 5 4 < 2.0 < 2.0 95 68 83 0.900 < 5 < 5 < 2.0 < 2.0 96 73 90 0.900 2 5 1.2 1.2 97 77 96 1.300 4 5 1.0 1.0 98 81 101 0.900 < 5 < 5 < 1.1 < 1.1 99 78 99 1.000 < 5 < 5 < 1.1 < 1.1 00 95 120 0.900 < 5 0.850 < 5 < 1.1 < 1.1 01 115 151 0.800 < 5 0.790 < 5 < 1.1 < 1.1 02 116 147 0.700 < 5 1.310 < 5 < 1.1 < 1.1 03 118 146 0.754 < 5 0.772 < 5 < 1.1 < 1.1 04 117 144 0.740 < 5 0.783 < 5 < 1.1 < 1.1 05 117 138 0.796 < - 5 0.939 < 5 < 1.1 < 1.1 06 116 139 0.695 < _ 6 0.752 < 5 < 1.1 < 1.1 07 116 141 0.715 < 5 0.745 < 5 < 1.1 < 1.1 08 117 - 139 0.988 < 5 0.766 < 5 .< 1.1 < 1.1 09 115 142 0.909 < 5 0.751 < 5 < 1.1 < 1.1 10 117 145 0.788 11 0.847 < 5 < 1.1 < 1.1 11 113 145 0.771 6 0.678 < 5 < 1.1 < 1.1 12 114 142 0.838 0.710 < 5 < 1.1 < 1.1 -_ 13 116 141 0.762 0.654 < < 1.1 < 1.1 14 113 145 0.953 0.747 < 1.1 < 1.1 15 118 147 1.010 0.722 7.2 < 1.0 16 117 149 0.971 0.774 < 1.0 < 1.0 17 118 142 1.018 0.740 < 1.0 < 1.0 18 120 140 1.058 0.970 < 1.0 < 1.0 Maximum 120 151 3.000 11 1.310 8 7.2 2.2 Minimum 60 83 0.695 < 1 0.654 4 1.0 1.0 Average 94 118 1.038 4 0.805 5 1.7 1.5 #Tests 38 38 36 31 19 30 38 38 0 - Site GW-11 Nitrate-Nitrogen • Chlorides 5 - 50 4 40 3 30 - C) _ p) - 2 20 10 0 ------ 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 O 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 t Nitrate Linear(Nitrate) --+—Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Coliform Bacteria 500 - 25 400 20 300 E 15 J O 200 a 10 100 - 5 0 -^ , • 0 - 81 82 83 84 85 86 87 88 89 90 91 r92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 -0--TDS Linear(TDS) —•--Total Coliforms Linear(Total Coliforms) Annual Metal Report - GW-11 Diamond Valley School Ca K Mg Na Ag Al As. Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb -Se TI V Zn 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 7/20/1988 9.5 1.1 2.5 5.1 <10 <4 20 <0.1 <10 <20 <30 <0.2 <10 <1 <1 14 11/21/1989 13.2 1.7 4.2 11.3 <10 <100 <10 <100 <1 <10 <50 1200 <1 120 <10 <5 <50 7/5/1990 9.1 2.1 2.5 6.9 <10 <100 <10 <100 <1 <10 <50 <100 <1 <10 <10 <5 <50 8/13/1991 9.3 1.3 2.5 5.2 <10 <50 <4 23 <0.1 <10 100 33 <0.2 <10 1 <1 12 6/8/1992 9.5 1.1 2.3 6.4 <10 <50 <4 21 <0.1 <10 40 <30 <0.2 <10 <1 <1 71 7/12/1994 8.8 1.1 2.1 5.2 <10 54 <2 24 <0.1 <10 35 <30 <0.2 <5 <1 <1 51 11/1/1995 8 1.3 1.9 4.9 <10 <50 <1 22 <0.1 <10 86 50 <0.2 <5 <1 <1' 14 6/11/1996 8.7 1.2 2 5 <10 190 <1 24 <0.1 <10 68 38 <0.2 <5 <1 <1 9.4 6/10/1997 11 1.3 2.8 6.9 <10 <25 <2 <50 <0.5 <10 140 <50 <0.5 <10 <5 <5 <50 6/9/1998 7.8 1.24 2.42 5.05 <10 <25 <2 <100 <0.5 <10 250 <30 <0.5 <20 <2.5 <515.5 7/6/1999 10.5 1.32 2.39 5.72 <10 <50 <2 <100 <1 <0.1 <10 226 <50 <0.2 <20 <5 <2.5 <3 <1 <1 <10 6/1/2000 9.1 1.26 2.47 5.6 <10 <2 180 219 <50 <20 <2.5 57.2 6/11/2001 13.0 1.68 4.85 9.48 14.1 <2 <100 30.8 <50 25.3 <2.5 250 6/11/2002 13.0 1.42 4.86 9.79 <10 <10 <2 <100 <0.2 <0.2 <1 31.5 <50 <0.01 <20 <1 <2.5- <1 <2 <0.2 123 6/10/2003 13.3 1.57 4.88 9.33 <10 <10 <2 0.1 <0.2 <0.2 <1 43.7 <50 0.01 <30 <1 <2.5 <1 <2 <0.2 205 6/8/2004 12.3 1.41 4.62 9.18 <10 <10 <2 <100 <0.2 <0.2 <1 27.1 <50 0.02 <20 <1 <2.5 <1 <2 <0.2 130 6/1/2005 12.9 1.48 4.68 9.13 <10 3.54 <100 27.5 <50 <2.5 200 6/7/2006 12.6 1.48 4.32 10.1 <10 <50 <2 <2 <2 <2 30.2 83.3 <0.2 <20 <2 <2 <2.5 <2 <10 <1 2 95 6/12/2007 ' 13.4 1.59 4.86 9.13 <10 <20 <2 31 <1 <0.5 <1 40.2 <50 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 85.8 6/18/2008 15.4 1.62 4.59 10.2 <10 <20 <2 34 <1 <0.5 <1 <20 <50 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 52.8 6/9/2009 13.4 1.51 4.94 9.83 <10 <20 <2 32 <1 <0.5 <1 28 <50 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 47.7 6/8/2010 14.0 1.50 5.20 10.00 <0.5 <20 <1 32 <1 <0.5 1.1 11 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 45 6/1/2011 13.6 1.64 5.35 8.99 <0.5. <20 <1 28.6 <1 <0.5 <1 23.7 <20 <0.2 <2 <2 <5 0.868 <1 <5 <1 <3 92.7 7/5/2012 12.3 1.59 4.34 8.72 <10 <20 <1 31.2 <1 <0.5 <1 81.9 <50 <0.2 <20 <2 <5 <2.5 <1 <5 <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 <0.5 <20 <1 35.1 <1 <0.5 <1 33.1 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 60.7 7/15/2015 14.1 1.58 5.07 9.25 <0.5 <20 <1 29.4 <1 <0.5 <1 17.6 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 51.1 8/10/2016 13.1 1.52 4.85 8.64 <0.5 <20 <1 29.3 <1 <0.5 <1 22 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 44.8 7/27/2017 12.6 1.55 4.54 8.01 <0.5 <20 <1 28.6 <1 <0.5 <1 21 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 30.9 8/29/2018 13.4 1.31 4.80 9.00 <0.5 <20 <1 30.6 <1 <0.5 <1 28.6 <20 <0.2 <2 / <2 <5 0.936 <1 <5 <1 <3 42.1 Site: GW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 3/13/2018 11.6 6.97 71 0.012 < 0.10 0.072 < 0.010 < 0.010 < 0.1 4/25/2018 13.2 6.36 60.8 0.015 < 0.050 < 0.020 < 0.010 1.08 0.869 8/29/2018 14.6 6.10 60.8 0.039 < 0.050 < 0.020 < 0.010 0.899 0.927 11/20/2018 11.0 6.37 62.8 0.024 < 0.050 < 0.020 0.028 1.02 0.974 Maximum 14.6 6.97 71.0 0.039 0.100 0.072 0.028 1.080 0.974 Minimum 11.0 6.10 60.8 ,_ < 0.012 < 0.050 < 0.020 < 0.010 < 0.010 0.100 Average 12.6 6.45 63.9 0.023 0.063 0.033 < 0.015 0.752 0.718 #Tests 4 4 4 0 0 4 4 4 4 4 4 Site: GW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2018 Total Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 3/13/2018 95 150 1.79 0.97 < 1 < 1 4/25/2018 107 132 1.73 2.06 < 1 < 1 8/29/2018 110 142 1.63 3.09 < 1 < 1 11/20/2018 102 139 2.40 1.79 < 1 < 1 Maximum 110 150 2.40 3.09 < 1 < 1 Minimum 95 132 1.63 0.97 < 1 < 1 Average 104 141 1.89 1.98 < 1.0 < 1.0 #Tests 4 4 4 0 4 0 4 4 0 Site: GW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2014 • To: 2018 Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 14 13.6 6.52 66.5 0.023 0.064 0.038 < 0.010 0.417 0.445 15 13.1 6.55 66.2 0.019 0.057 0.022 < 0.010 0.667 0.607 16 13.2 6.48 66.8 0.027 0.080 0.032 < 0.010 0.407 0.433 17 - 14.6 6.63 68.0 0.029 0.107 0.034 < 0.010 0.365 0.394 18 12.6 6.45 63.9 0.023 0.063 0.033 < 0.015 0.752 -0.718 Maximum 14.6 6.63 68.0 0.029 0.107. 0.038 < 0.015 0.752 0.718 Minimum 12.6 6.45 63.9 0.019 0.057 0.022 < 0.010 0.365 0.394 Average 13.4 6.53 66.3 0.024 0.074 0.032 < 0.011 0.522 0.519 #Tests 5 5 5 0 0 5 5 5 5 5 5 Site: GW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA - From 2014 To: 2018 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 14 111 147 3.55 1.74 < 1.1 < 1.1 Well installed in 2014 15 110 150 2.25 1.71 < 1.0 < 1.0 16 107 156 2.13 1.33 < 1.0 < 1.0 17 102 140 1.82 1.10 < 1.0 < 1.0 18 104 141 1.89 1.98 < 1.0 < 1.0 Maximum 111 156 3.55 1.98 < 1.1 < 1.1 Minimum 102 140 1.82 1.10 < 1.0 < 1.0 Average 107 147 2.33 1.57 < 1.0 < 1.0 #Tests 5 5 5 0 5 0 5 5 0 Site GW-17 Nitrate-Nitrogen Chlorides 5 50 _ 4 i 40 3 30 J - J - 0) _ a - E _ _ 2 E 20 1 i - 10 , r _ 0 0 14 15 16 17 18 14 15 r 16 17 18 —t—Nitrate Linear(Nitrate) —o—Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Coliform Bacteria 500 - - 25 400 20 -300 E 15 J - c - _ O - E 200 0. 10 100 • • • 5 - • • • • • 0 , • 0 , 14 15 16 17 18 14 15 16 17 18 j —4—TDS Linear(TDS) —4,—Total Coliforms Linear(Total Coliforms) 1 Annual Metal Report GW-17 Diamond Valley Ranch House Well, Ca K Mg Na Ag Al As Ba Be 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 9/30/2013 12.0 1.80 3.30 11.0 <2 480 <2 52 <2 <2 <2 <2 10/1/2013 19.0 6.00 8.00 32.0 <2 17000 2 500 2 <2 7 46 10/2/2013 17.0 1.5 4.70 15.0 <2 2400 <2 64 <1 <2 <2 6 8/12/2014 12.6 1.82 3.51 11.2 <0.5 <20 <1 47.3 <1 <0.5 <1 6.68 7/15/2015 12.3 1.75 3.32 9.54 <0.5 <20 <1 43.4 <1 <0.5 <1 <10 8/10/2016 11.8 1.66 3.39 9.33 <0.5 <20 <1 45 <1 <0.5 <1 5.09 7/27/2017 11.5 1.58 3.20 8.81 <0.5 <20 <1 43.9 <1 <0.5 <1 3.1 8/29/2018 12.8 1.48 3.48 9.52 <0.5 <20 <1 48 <1 <0.5 <1 3.5 Fe Hg Mn Mo Ni Pb Sb Se 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 9/30/2013 360 0.2 37 <2 <2 <2 <10 1 <2 100 10/1/2013 16000 <0.1 790 6 22 2 <10 <1 14 220 10/2/2013 ,880 <0.1 44 <2 <2 <2 <10 <1 <2 250 10/23/2013 1380 10/25/2013 98.2 8/12/2014 374 <0.2 10.5 <2 <5 0.976 <1 <5 <1 <3 532 7/15/2015 206 <0.2 12.6 <2 <5 <0.5 <1 <5 <1 <3 521 11/18/2015 10500 8/10/2016 196 <0.2 4.45 <2 <5 <0.5 <1 <5 <1 <3 239 7/27/2017 284 <0.2 4.88 <2 <5 <0.5 <1 <5 <1 <3 120 8/29/2018 86.7 <0.2 5.5 <2 <5 <0.5 <1 <5 <1 <3 83.7 ALPINE COUNTY SURFACEWATERS Site: SW-01 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson R Woodfords ALPINE COUNTY SURFACEWATER QUALITY DATA 2018 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K Date C - pH. mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L 1/3/2018 4.3 7.17 34.1 0.7 0.49 62 68.5 0.976 0.013 < 0.010 2/1/2018 3.3 7.35 32.5 0.7 0.79 57 67.1 1.18 0.014 < 0.010 3/6/2018 0.4 7.71 35.9 0.83 0.7 60 78.1 1.28 0.018 < 0.010 4/3/2018 • 2.2 7.82 26.7 3.6 8.93 47 54.6 1.44 0.035 < 0.010 5/10/2018 6.9 7.76 23.4 2.5 6.04 38 35 0.915 0.026 0.025 6/7/2018 11.2 8.40 25.2 1.7 3.06. 50 51.2 0.671 0.021 0.010 7/10/2018 15.8 7.67 35.2 1.0 1.64 59 69.1 0.872 0.033 0.012 8/7/2018 13 7.69 30.9 1.7 3.28 49 62.8 0.779 0.038 0.014 9/5/2018 9.8 6.19 37.3 0.52 1.08 52 76 < 1.0 0.024 0.011 10/3/2018 10.1 6.53 37.9 0.61 0.84 66 78.1 0.983 0.029 0.015 11/6/2018 3.3 7.88 37.8 1.2 0.38 55 76 1.31 0.048. 0.017 12/4/2018 0.6 7.78 36.6 1.1 1.08 56 84.6 1.75 0.017 < 0.013 Maximum 15.8 8.40 37.9 3.60 8.93 66 85 1.75 0.048 0.025 Minimum 0.4 -6.19 23.4 0.52 0.38 38 35 0.67 0.013 < 0.010 Average 6.7 7.50 32.8 1.35 2.36 54 67 1.10 0.026 0.013 #Tests 12 12 12 12 12 _ 12 12 12 12 12 0 0 r Site: SW-01 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson R Woodfords ALPINE COUNTY SURFACEWATER QUALITY DATA 2018 Coliforms Fecal < Blue Green Algae > Single Hard- Total E.coli Strep < Colonies > < Filaments > <---Filamaments---> Cells D.O. SO4 ness Date MPN MPN - MPN # cells # cells # um #cells mg/L mg/L mg/L 1/3/2018 83 5.2 - 10.95 1.91 2/1/2018 29.2 2 10.85 1.71 3/6/2018 20.1 < 1 12.1 2.05 4/3/2018 111.9 < 1 11.1 1.07 5/10/2018 51.2 1 11.3 1.51 6/7/2018 261.3 2 9.33 1.11 7/10/2018 328.2 5.2 8.27 1.46 8/7/2018 2530 14.6 8.63 1.34 9/5/2018 461.1 3.1 8.78 1.2 10/3/2018 142 3.1 9.6 1.68 11/6/2018 24.3 < 1 10.97 2.32 12/4/2018 98.8 5.2 11.8 2.68 Maximum 2,530 15 0 0 0 0 0 0 0 12.10 2.68 Minimum 20 < 1 0 0 0 0 0 0 0 8.27 1.07 Average 345 4 10.31 1.67 #Tests 12 12 0 0 0 0 0 0 0 0 12 12 0 Site: SW-01 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson R Woodfords ALPINE COUNTY SURFACEWATER QUALITY DATA From 1981 To: 2018 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L 81 8.1 7.70 32 0.68 2 56 71 1.3 0.02 0.01 1.30 82 5.2 7.58 25 1.70 6 46 54 0.02 0.01 0.92 83 6.1 7.67 27 2.07 7 46 56 0.5 0.02 0.02 1.03 84 5.7 7.40 30 1.60 5 49 58 0.7 0.03 0.03-, 1.15 85 5.8 7.69 33 1.20 3 48 65 0.7 0.02 0.29 ' 1.27 86 4.7 7.64 27 1.49 5 51 57 0.8 0.03 0.02 1.10 87 6.8 7.18 35 0.66 2 55 73 0.8 0.02 0.01 1.45 88 7.0 7.07 35 0.73 2 56 75 1.0 0.01 0.30 1.29 89 5.7_ 7.57 30 1.49 5.5 49 71 1.3 0.02 0.02 1.87 90 7.4 7.68 33 0.97 4.2 53 80 1.1 0.02 0.01 0.02 1.34 91 7.8 7.71 33 1.37 5.2 53 75 1.2 0.03 0.01 0.02 1.32 92 8.0 7.99 34 0.90 2.3 58 81 1.2 0.02 0.01 0.02 1.27 93 6.2 7.95 30 1.67 5.8 53 68 1.4 0.03 0.01 0.02 1.20 94 6.4 7.61 34 0.71 • 2.1 56 78 1.1 0.02 0.01 0.02 .1.35 95 5.3 7.52 27 1.68 10.8 49 64 1.2 0.03 0.01 0.02 1.23 96 6.5 7.47 28 1.11 4.8 53 61 1.0 0.02 0.01 0.01 1.20 97 6.0 7.24 29 0.83 2.1 49 62 1.0 0.07 0.01 0.01 1.21 98 5.1 6.87 29 1.28 4.4 49 62 1.3 0.03 0.01 0.02 1.21 99 5.9 7.17 29 0.68 2.7 53 70 1.4 0.02 < 0.01 0.01 1.33 00 5.8 7.24 31 1.60 9.1 54 61 1.3 0.03 0.01 0.02 1.32 01 6.3 7.10 33 1.42 3.8 56 72 1.4 0.02 0.02 0.01 1.41 02 5.6 7.38 32 1.48 2.8 57 70 1.7 0.02 0.01 0.01 1.30 03 5.1 7.48 31 5.09 10.9 54 67 1.7 - 0.02 0.01 0.02 1.29 04 5.4 7.25 31 4.28 9.5 55 66 1.8 0.03 0.02 0.02 1.28 05 4.9 7.35 32 2.13 5.7 57 55 2.2 0.02 0.01 0.02 1.26 06 5.1 7.06 26 2.94 6.3 49 40 1.4 0.02 0.01 0.02 1.10 07 6.7 7.28 31 1.77 3.8 57 65 1.4 0.01 0.01 0.01 1.36 08 5.8 7.87 32 1.44 2.4 54 69 1.6 0.01 0.01 0.01 1.33 09 5.0 7.43 31 3.17 4.4 54 66 1.3 0.02 0.01 0.01 1.27 10 4.5 7.34 30 2.68 5.1 53 66 1.3 0.02 0.01 < 0.01 1.30 11 4.1 7.53 29 3.22 5.9 53 59 1.0 0.02 0.01 0.01 1.16 12 5.8 6.98 34 1.56 2.5 56 70 1.1 0.02 0.01 0.01 1.42 13 5.8 6.91 32 1.54 2.7 53 67 1.1 0.02 0.01 0.01 1.20 14 5.8 7.27 35 1.06 2.7 58 78 1.3 0.02 0.01 0.01 1.38 15 6.5 6.78 35 1.22 2.3 58 76 1.2 0.02 0.01 0.01 1.34 16 5.5 6.96 30 2.24 5.6 57 66 1.4 0.03 0.01 1.23 17 5.6 7.10 28 2.57 6.0 51 58 1.0 0.03 0.01 1.04 18 6.7 7.50 32.8 1.35 2.36 54 67 1.10 0.03 0.01 Maximum 8.1 7.99 35 5.09 10.9 58 81 2.2 0.07 0.02 0.30 1.87 Minimum 4.1 6.78 25 0.66 2.0 46 40 0.5 0.01 < 0.01 0.01 0.92 Average 5.9 7.38 31 1.73 4.6 53 66 1.2 0.02 0.01 0.03 1.27 #Tests 38 38 38 38 38 38 38 37 38 29 35 37 Site: SW-01 SOUTH TAHOE PUBLIC UTILITY DISTRICT ' Stream: Carson R Woodfords ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2018 Oil& TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Ca Mg Na SAR Na Year mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 81 0.17 0.04 0.37 5 1 1 82 0.09 0.02 0.17 6 1 < 1 83 0.13 0.02 < 0.01 0.02 0.17 5 1 < 1 84 0.22 0.07 < 0.01 0.01 0.24 7 1 < 1 6.02 1.71 2.71 0.25 19.7 85 0.14 0.03 < 0.01 0.02 0.17 4 1 < 1 6:89 1.84 3.11 0.27 20.1 86 0.13 0.03 < 0.01 0.02 0.16 4 1 < 1 5.80 1.64 2.55 0.24 19.4 87 0.15 0.03 < 0.01 0.01 0.17 4 1 < 1 7.31 2.03 3.54 0.29 21.1 • 88 0.15 0.03 < 0.01 0.02 0.18 5 1 < 1 7.86 2.20 3.69 0.29 20.7 89 0.16 0.03 < 0.01 0.03 0.20 7 1.1 < 1 6.76 1.82 2.93 0.25 18.7 90 0.11 0.02 < 0.01 0.02 0.15 5 1.0 < 1 _ 7.51 2.05 3.48 0.29 20.5 91 0.13 0.03 0.01 0.03 0.17 9 1.1 < 1 7.36 2.00 3.43 0.28 20.7 92 0.14 0.03 0.01 0.02 0.17 8 1.3 1 8.12 1.98 3.58 0.28 20.3 93 0.33 0.03 0.01 0.03 0.36 11 1.4 < 1 7.22 1.88 3.33 0.28 20.4 94 0.19 0.03 0.01 0.01 0.21 < 5 1.0 1 7.58 1.95 3.82 0.31 22.2 95 0.20 0.04 0.01 0.02 0.23 8 1.3 1 6.58 1.81 3.28 0.28 21.4 96 0.21 0.02 0.01 0.04 0.26 6 1.1 1 6.38 1.68 3.11 0.27 21.4 97 0.19 0.05 0.01 0.09 0.29 5 1.0 4 6.63 1.83 3.30 0.29 21.7 98 0.18 0.03 0.01 0.03 0.22 5 1.0 < 1 6.20 1.68 3.14 0.28 21.9 99 0.17 0.03 < 0.01 0.03 0.21 < 5 1.1 6.60 1.81 3.47 0.31 22.5 00 0.20 0.02 < 0.01 0.01 0.22 5 1.2 5.92 1.84 3.46 0.32 23.7 01 0.16 0.02 < 0.01 0.01 0.19 15 1.1 7.20 1.97 3.84 0.32 23.0 02 0.24 0.03 < 0.01 0.02 0.26 5 0.7 6.93 1.90 3.86 0.33 23.7 03 0.18 0.03 0.01 0.02 0.21 6 0.9 6.91 1.90 3.63 0.31 22.7 04 0.16 0.04 0.01 0.02 0.18 9 0.8 6.70 1.92 3.54 0.31 22.4 05 0.15 0.02 < 0.01 0.03 0.19 12 1.2 7.01 1.87 3.55 0.30 22.0 06 0.11 0.03 < 0.01 0.02 0.13 10 1.2 5.98 1.64 3.08 0.28 22.2 07 0.25 0.02 < 0.01 0.02 0.28 9 1.1 7.19 1.93 3.84 0.32 22.9 08 0.14 < 0.02 < 0.01 0.01 0.17 9 1.0 7.27 1.90 3.79 0.32 22.7 09 0.17 < 0.02 < 0.01 0.01 0.19 8 0.9 7.08 1.87 3.58 0.31 22.2 10 0.09 < 0.02 < 0.01 0.01 0.12 12 1.8 6.92 1.90 3.44 0.30 21.6 11 0.09 < 0.04 < 0.01 0.03 0.12 7 1.3 6.27 1.70 3.12 0.28 21.6 12 0.13 0.02 < 0.01 0.01 0.16 1.4 7.40 1.94 3.71 0.31 21.9 13 0.14 0.03 < 0.01 0.01 0.14 1.1 7.33 1.80 3.46 0.29 21.4 14 0.12 0.03 < 0.01 0.01 0.12 1.1 7.84 2.03 4.05 0.33 22.8 15 0.12 -- 0:02 < 0.01 0.01 0.12 8.28 2.08 3.96 0.32 21.8 16 0.14 0.02 < 0.01 0.03 0.17 7.27 1.81 3.55 0.30 21.9 17 0.14 0.02 < 0.01 0.01 0.15 6.53 1.70 3.06 0.27 21.1 18 0.27 0.02 < 0.010 0.01 0.28 Maximum 0.33 0.07 0.01 0.09 0.37 15 1.8 4 8.28 2.20 4.05 0.33 23.7 Minimum 0.09 0.02 < 0.01 0.01 0.12 4 0.7 < 1 5.80 1.64 2.55 0.24 18.7 Average 0.16 0.03 0.01 0.02 0.20 7 1.1 1 6.97 1.87 3.44 0.29 21.6 #Tests 38 38 36 36 38 31 34 18 34 34 34 34 34 Site: SW-01 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson R Woodfords ALPINE COUNTY SURFACEWATER QUALITY DATA , From: 1981 To: 2018 Coliforms Fecal/ Fecal < Blue Green Algae > Single Hard- Total E.coli Strep < Colonies > < Filaments > <---Filamaments---> Cells D.O. SO4 ness Year MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 81 307 226 184 23 208 27 221 8 487 3 82 123 38 31 16 77 50 731 17 445 26 83 260 135 47 22 427 92 1,015 35 790 22 9.87 < 0.01 25 84 419 55 48 293 4, 61 970 226 2,220 52 9.38 1.17 25 85 165 45 48 0 0 286 43 196 10 0 9.92 0.73 27 86 175 43 100 0 0 45 92 92 3 69 10.42 9.57 23 87 140 74 37 0 0 46 623 139 3 27,077 9.78 4.88 27 88 294 < 30 43 0 0 0 0 1,085 54 0 11.71 3.61 89 271 48 285 0 0 0 0 439 22 231 10.23 3.82 90 163 50 156 0 0 0 0 0 0 0 9.25 3.97 25 91 153 37 40 0 0 6 115 0 0 0 8.94 4.08 23 92 164 26 130 0 0 0 0 0 0 0 9.88 4.16 26 93 176 41 40 0 0 15 50 0 0 0 10.02 3.86 22 94 118 32 37 0 0 0 4 0 0 0 9.94 4.70 25 95 73 31 35 0 0 0 33 0 0 0 10.24 4.32 21 96 142 33 35 0 0 0 0 0 0 0 10.56 2.34 22 97 75 30 130 0 0 0 0 0 0 0 10.75 2.81 25 98 67 31 60 0 0 29 179 0 0 0 9.44 2.27 19 99 110 32 130 0 0 3 29 0 0 0 10.10 2.37 00 38 < 28 < 30 0 0 0 0 0 0 0 10.24 2.30 01 44 16 < 30 0 0 0 0 0 0 0 9.58 2.02 02 37 9 107 0 0 4 113 0 0 0 9.37 2.15 03 65 21 21 0 0 0 0 0 0 0 10.06 2.04 04 60 5 22 0 0 0 0 0 0 0 9.93 1.99 05 26 11 8 0 0 94 782 0 0 0 10.74 2.09 06 119 54 < 3 0 0 0 0 0 0 0 10.24 1.39 07 23 6 < 26 0 0 0 0 0 0 0 9.59 1.85 08 40 4 117 0 0 0 0 0 0 0 10.30 2.32 09 244 16 4 0 0 0 0 0 0 0 10.14 2.03 10 228 32 < 3 0 0 3 85 0 0 0 9.28 1.99 11 70 22 4 0 0 3 28 0 0 0 10.52 1.38 12 63 14 6 0 0 0 0 0 0 0 9.67 1.90 13 480 10 4 0 0 0 0 0 0 0 10.52 2.25 14 518 25 4 0 0 0 0 0 0 0 9.75 2.18 15 588 7 10.44 2.22 16 330 3 11.69 1.94 17 218 5 10.52 1.29 18 345 4 10.31 1.67 Maximum 588 226 285 293 427 286 1,015 1,085 2,220 27,077 11.71 9.57 27 Minimum 23 3 3 0 0 0 0 0 0 0 8.94 < 0.01 19 Average 182 35 59 10 21 22 150 66 119 808 10.09 2.66 24 #Tests 38 38 34 34 34 34 34 34 34 34 36 36. 14 Site: SW-01 Nitrate-Nitrogen Total Phosphorus 0.5 0.5 0.4 0.4 0.3 0.3 _ J - J C) - C) - E - E - 0.2 0.2 0.1 0.1 0.0 , . , , , , , . . , . , , , . `''' , , • 0.0 , , , , , , , , , , , , , , , , , , , , , , • 0 RP q;\ 00 0` 4b 04' 4‘ 00 O'` Ob O O o°b '''` b'` 03 �� O\ OO^ C CP O'' 00 OO� O`' O O°' --+—Nitrate Linear(Nitrate) —4—Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 10 250 - 9 1 I 8 ^ 200 7 1 _ 6 = 150 _ _ v) 5 • 4 - 100 3 2 E 50 Etvopow-444.4-61=1,4,4-cRprb—••=1=1 1 -.. _ .lb _ 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 O' 435 4P 01 00 0,'` g' oh o,1 0,°' O'` OOP O O '� 0 0 K‘ —4—Chlorides Linear(Chlorides) —4--TDS Linear(TDS) Site: SW-02 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek,Upper ALPINE COUNTY SURFACEWATER QUALITY DATA 2018 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K Date C pH _ mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L 03/06/18 0.3 7.52 47.2 1.50 0.55 75 95.1 1.01 0.018 < 0.010 04/03/18 5.6 7.73 43.0 2.60 0.69 77 85.4 0.97 0.026 0.01 05/10/18 13.1 7.92 52.9 2.00 1.54 83 - 106 1.230 0.030 0.03 06/07/18 9.4 7.58 55.7 1.60 0.35 91 109 0.869 0.021 0.01 07/10/18 16.5 7.62 59.4 1.80 0.42 92 106 0.887 0.030 0.01 08/07/18 14.4 7.67 70.3 3.40 0.83 100 132 0.927 0.056 0.03 09/05/18 11.3 7.69 58.5 3.60 0.95 88 112 < 1.0 0.047 0.02 10/03/18 11.4 6.87 55.8 3.70 1.52 89 108 0.660 0.039 0.01 11/06/18 4.9 6.60 51.2 2.90 0.46 69 104 1.030 0.063 0.02 Maximum 16.5 7.92 70.3 3.70 1.54 100 132 1.230 0.063 0.031 Minimum 0.3 6.60 43.0 1.50 0.35 69 85.4 0.660 0.018 < 0.010 Average 9.7 7.47 54.9 2.57 0.81 85 106 0.953 0.037 0.018 #Tests 9 9 9 9 9 9 9 9 9 9 0 0 , Site: SW-02 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek,Upper ALPINE COUNTY SURFACEWATER QUALITY DATA 2018 Coliforms Fecal < Blue Green Algae > Single Hard- Total E.coli Strep < Colonies > < Filaments > <---Filamaments---> Cells D.O. SO4 ness Date MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 03/06/18 - 109 4.1 12.00 < 0.50 04/03/18 140 < 1 10.30 < 0.50 05/10/18 387 77.1 8.02 1.05 06/07/18 436 22.6 6.94 < 0.50 07/10/18 1,046 105 6.94 < 0.50 08/07/18 1,203 27.8 5.62 < 0.50 09/05/18 1,354 58.6 6.36 < 1.0 10/03/18 1,550 17.3 11.40 < 0.50 11/06/18 225 3.1 9.22 1.26 Maximum 1,550 105 - 0 0 0 0 0 0 0 12.00 < 1.26 Minimum 109 1 0 0 0 0 0 0 0 5.62 < 0.50 -Average 717 35 8.53 < 0.70 #Tests 9 9 0 0 0 0 0 0 0 0 9 9 0 r Site: SW-02 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek,Upper ALPINE COUNTY SURFACEWATER QUALITY DATA From 1981 To: 2018 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L 81 13.8 7.33 54 6.50 3 109 162 1.8 0.05 0.01 1.94 82 83 8.6 7.56 39 5.13 3 72 69 0.7 0.02 0.04 1.40 84 8.4 7.71 40 2.36 6 64 76 0.8 0.03 0.02 1.48 85 86 87 5.2 7.55 48 2.20 1 70 80 1.1 0.02 < 0.01 1.50 88 6.3 6.90 46 1.97 1 81 92 1.2 0.02 0.01 1.25 89 5.9 7.47 44 2.86 2.0 79 94 1.3 0.02 0.02 1.30 90 4.5 7.42 44 2.82 2.0 77 108 1.1 0.02 0.01 1.32 91 7.9 8.10 47 4.90 2.3 81 106 1.7 0.03 0.01 0.01 1.57 92 9.0 7.52 54 4.01 4.3 90 105 1.4 0.05 0.01 0.02 1.51 93 8.7 7.51 44 3.06 1.1 80 93 1.8 0.04 0.02 0.02 1.64 94 5.5 7.14 47 3.09 1.0 79 97 1.4 0.03 0.01 0.02 1.37 95 8.4 7.63 44 2.51 1.4 79 90 1.4 0.03 0.02 0.01 1.48 96 9.5 7.45 52 3.37 2.9 82 104 1.9 0.04 0.01 0.01 1.79 97 8.2 7.43 57 4.38 13.2 86 111 0.9 0.06 0.01 0.02 '1.70 98 7.5 7.30 55 2.35 2.2 85 109 1.0 0.03 0.01 0.01 1.58 99 8.5 7.19 52 2.03 1.9 81 104 0.9 0.03 0.01 0.02 1.53 00 9.3 7.28 58 1.63 1.2 88 109 1.3 0.04 0.01 0.02 1.63 01 5.0 7.29 50 2.04 1.8 82 98 1.5 0.02 0.03 0.01 1.33 02 6.9 7.14 45 2.19 3.5 78 91 1.7 0.02 0.01 0.02 1.49 03 9.4 7.55 45 1.63 1.0 78 85 1.4 0.02 0.01 0.03 1.48 04 8.6 7.23 46 2.17 1.5 77 89 1.4 0.02 < 0.01 0.02 1.45 05 8.6 7.27 46 1.73 1.1 77 80 1.8 0.02 0.01 0.02 1.35 06 9.1 6.92 44 2.38 3.0 76 69 1.0 0.03 0.01 0.02 1.42 07 9.4 7.51 50 1.77 0.7 81 98 1.2 0.03 0.01 0.01 1.52 08 7.9 7.59 45 1.77 2.0 72 89 1.7 0.03 0.01 < 0.01 1.59 09 9.4 7.20 46 2.20 1.0 80 92 1.2 0.02 0.01 < 0.01 1.72 10 8.3 7.35 40 2.33 1.2 72 84 1.0 0.03 0.01 < 0.01 1.72 11 9.2 7.58 48 3.99 2.5 85 93 1.3 0.04 0.01 0.01 2.29 12 9.4 7.17 55 1.72 1.6 84 105 0.7 0.03 0.01 < 0.01 1.53 13 6.1 6.95 44 1.34 0.1 75 85 0.9 , 0.04 0.01 0.01 1.29 14 5.9 7.01 39 2.57 1.4 73 80 1.3 0.02 0.01 0.02 1.47 15 5.9 6.94 41 3.20 0.4 84 87 0.9 0.02 0.01 , 0.01 1.44 16 9.7 7.10 46 2.03 0.6 87 101 1.7 0.03 0.01 1.54 17 10.0 7.18 42 1.66 0.7 70 83 1.0 0.02 0.01 1.51 18 9.7 7.47 55 2.57 0.8 85 106 1.0 0.04 0.02 Maximum 13.8 8.10 58 6.50 13.2 109 162 1.9 0.06 0.03 0.04 2.29 Minimum 4.5 6.90 39 1.34 0.1 64 69 0.7 0.02 < 0.01 < 0.01 1.25 Average 8.1 7.34 47 2.70 2.1 80 95 1.3 0.03 0.01 0.02 1.53 #Tests 35 35 35 35 35 35 35 35 35 28 32 34 • 1. Site: SW-02 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek,Upper ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2018 ' Oil& - TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Ca Mg Na SAR Na Year mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L % 81 0.41 0.10 0.60 9 < 1 < 1 82 83 0.25 0.05 < 0.01 0.01 0.18 8 1 < 1 84 0.49 0.05 < 0.01 < 0.01 0.51 9 1 < 1 7.77 1.95 4.48 0.37 24.8 85 86 87 0.17 < 0.02 < 0.01 0.02 0.22 6 1 < 1 9.80 2.50 7.10 0.52 29.6 88 0.19 0.03 < 0.01 0.01 0.20 9 1 < 1 9.15 2.38 6.77 0.51 30.1 89 0.20 0.02 < 0.01 0.02 0.23 9 1.0 < 1 8.50 2.06 6.85 0.55 32.4 90 0.14 0.02 < 0.01 0.01 0.17 8 1.2 < 1 8.77 2.15 6.93 0.54 31.9 91 0.25 0.03 0.01 - 0.01 0.28 9 1.1 < 1 9.24 2.29 7.10 0.54 30.9 92 0.28 0.03 0.01 0.02 0.31 9 1.4 1 10.99 2.49 8.08 0.57 31.2 93 0.36 0.02 0.01 0.02 0.39 24 1.2 < 1 9.25 2.29 7.05 0.54 31.0 94 ' 0.26 0.02 0.01 0.02 0.29 < 5 1.0 < 1 9.24 2.30 7.97 0.61 33.8 95 0.28 0.05 0.01 0.02 0.31 8 1.2 1 9.08 2.15 6.15 0.48 28.9 96 0.32 0.02 0.01 0.03 0.36 7 1.2 1 10.77 2.67 7.07 0.49 27.8 97 0.32 0.02 0.01 0.10 0.43 9 1.1 3 12.43 3.10 7.21 0.46 25.9 98 0.26 0.02 < 0.01 0.02 0.29 5 1.0 < 1 11.23 2.74 6.51 0.46 26.1 99 0.24 0.02 < 0.01 0.02 0.27 6 1.0 10.56 2.64 6.47 0.46 26.6 00 0.25 0.02 < 0.01 < 0.01 0.25 . 7 0.9 10.88 2.82 7.41 0.52 28.6 01 0.25 0.02 < 0.01 0.02 0.27 20 1.1 9.49 2.39 7.68 0.58 32.4 02 0.26 0.03 < 0.01 0.03 0.30 < 5 0.8 8.02 2.10 7.72 0.64 36.0 03 0.22 0.02 0.01 0.01 0.24 7 0.8 8.38 2.20 6.48 0.52 31.1 04 0.21 0.03 < 0.01 < 0.01 0.23 7 1.1 8.47 2.20 6.45 0.52 31.2 05 0.28 0.02 < 0.01 0.01 0.30 12 1.8 8.39 2.18 6.23 0.50 30.4 06 0.16 0.02 < 0.01 < 0.01 0.18 10 1.0 8.59 2.16 5.87 0.46 28.7 07 0.16 0.05 < 0.01 < 0.01 0.19 8 1.0 '9.56 2.41 8.01 0.60 33.0 08 0.15 < 0.02 < 0.01 0.01 0.18 8 0.9 8.52 2.06 7.06 0.57 32.8 09 0.30 < 0.02 < 0.01 < 0.01 0.32 , 19 0.8 8.76 2.16 7.30 0.58 33.3 10 0.17 < 0.02 < 0.01 < 0.01 0.19 13 1.3 8.04 2.09 6.17 0.51 30.8 11 0.25 0.02 < 0.01 0.01 0.28 12 1.5 8.95 2.36 6.82 0.53 30.1 12 0.18 0.02 < 0.01 < 0.01 0.20 1.4 10.36 2.50 7.86 0.57 31.2 13 0.16 0.02 < 0.01 0.01 0.17 1.2 7.88 1.93 7.80 0.65 36.9 14 0.19 0.02 < 0.01 0.01 - 0.20 1.3 6.81 1.69 7.95 0.71 40.1 15 0.22 < 0.02 < 0.01 0.01 0.22 6.97 1.78 9.24 0.81 43.3 16 0.19 < 0.02 < 0.01 < 0.01 0.20 8.76 2.14 8.27 0.66 36.4 17 0.15 0.02 < 0.01 < 0.01 0.16 8.40 2.02 5.81 0.47 29.2 18 0.15 0.02 < 0.01 < 0.01 0.15 Maximum 0.49 0.10 0.01 0.10 0.60 24 1.8 3 12.43 3.10 9.24 0.81 43.3 Minimum 0.14 < 0.02 < 0.01 < 0.01 0.15 < 5 0.8 < 1 6.81 1.69 4.48 0.37 24.8 Average 0.24 0.03 0.01 0.02 0.26 10 1.1 1 9.13 2.28 7.06 0.55 31.5 #Tests 35 35 34 34 35 28 31 15 32 32 32 32 32 Site: SW-02 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek,Upper ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2018 Coliforms Fecal/ Fecal < Blue Green Algae > Single Hard- Total E.coli Strep < Colonies > < Filaments > <---Filamaments---> Cells D.O. SO4 ness Year MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 81 3,820 283 2,315 5 10 37 452 0 0 2 82 • 83 336 73 33 0 0 6 32 2 30 0 8.85 2.34 32 84 3,140 122 - 180 155 105 3 5 347 209 44 8.61 1.10 29 85 86 87 40 < 30 < 30 0 0 0 0 0 0 0 9.10 3.40 88 107 32 90 0 0 92 877 46 1 92 9.43 3.58 89 86 31 58 0 0 79 1,968 35 213 0 9.28 3.77 90 112 30 72 0 0 0 0 0 0 323 7.53 3.75 33 91 130 40 40 0 0 0 0 0 0 0 7.41 4.35 30 92 372 73 150 5 91 86 201 0 0 0 8.82 4.55 38 93 810 261 150 0 0 4 95 0 0 0 8.15 4.09 28 94 753 31 90 0 0 0 0 0 0 0 8.13 5.04 58 95 793 243 230 0 0 0 0 0 0 0 8.81 4.35 30 96 1,956 - 529 770 0 0 0 0 0 0 0 8.53 2.93 35 97 1,567 497 155 0 0 3 53 0 0 0 8.74 - 3.36 45 98 982 562 160 0 0 0 0 0 0 0 8.92 2.63 42 99 863 90 < 30 0 0 0 0 0 0 0 8.34 2.99 00 434 79 65 0 0 0 0 0 0 0 7.76 1.31 01 128 73 90 0 0 0 0 0 0 0 8.70 0.63 02 81 13 68 0 0 41 375 0 0 0 8.55 0.70 03 141 35 33 0 0 0 0 0 0 0 7.34 0.59 04 271 27 68 0 0 0 0 0 0 0 7.97. 0.67 05 220 84 220 0 0 0 0 0 0 0 8.60 0.47 06 746 320 235 0 0 0 0 0 0 0 7.30 0.43 07 673 145 97 0 0 0 0 0 0 0 7.99 0.65 08 111 20 68 0 0 5 15 0 0 0 7.83 0.61 09 2,024 . 96 43 0 0 0 0 0 0 0 6.86 0.46 10 1,631 186 4 0 0 3 65 0 0 0 5.80 0.60 11 1,768 1,412 19 0 0 0 0 0 0 0 7.95 < 0.50 12 323 186 3 0 0 0 0 0 0 0 6.48 < 0.50 13 44 20 3 0 0 0 0 0 0 0 8.09 0.58 14 110 4 4 0 0 0 0 0 0 0 8.71 1.00 15 359 3 7.19 1.40 16 1,022 9 8.57 . 1.06 17 778 45 8.96 < 0.50 18 717 35 8.53 < 0.70 Maximum 3,820 1,412 2,315 155 105 . 92 1,968 347 213 323 9.43 5.04 58 Minimum 40 3 < 3 0 0 0 0 0 0 0 5.80 0.43 28 Average 784 163 180 5 7 12 133 14 15 15 8.17 1.93 36 #Tests 35 35 31 31 31 31 31 31 31 31 34 34 11 Site: SW-02 Nitrate-Nitrogen Total Phosphorus 0.5 0.5 0.4 0.4 0.3 0.3 0.2 0.2 0.1 0.1 0.0 , , , . , O\ 93) cg° cb‘ %V) O^ CP O) 0b\ cP \ O"' CP OS' O°' ,N N3 � � 41\ On) Oh O O' O' OP Oh 01 O°' ON Oma' Oh 6' 0 0 K ---♦—Nitrate Linear(Nitrate) —0--Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 10 250 9 8 _ 200 7 = _ 6 = 150 J - J o) 5 E = E 4 = 100 3 2 - 50 1 -,1: ::: .4`41=16°' 7'"eleAP*41%;71. ' 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 g'` RP 4) 4>1 00 0� c? 4' o,'' o,°' ON O`5 CP O' O°' �—Chlorides Linear(Chlorides) —4--TDS Linear(TDS) Site: SW-03 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek,Mid ALPINE COUNTY SURFACEWATER QUALITY DATA 2018 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K Date C pH mg/L NTU mg/L mg/L um hos mg/L mg/L mg/L mg/L mg/L 03/06/18 1.9 7.92 50.4 5.9 4.7 78 112 2.17 0.050 < 0.010 04/03/18 7.8 6.39 45.7 4.4 6.35 83 95.3 1.31 0.049 0.017 05/10/18 14.3 7.64 43.8 3.1 10.4 76 87.0 1.31 0.060 0.033 06/07/18 17.6 7.51 50.7 2.8 3.36 90 103 7.02 0.047 0.084 07/10/18 22.3 7.49 97.6 4.6 6.06 147 199 4.89 0.089 0.025 08/07/18 17.8 7.46 102 3.3 2.57 149 209 4.8 0.078 0.030 09/05/18 15.0 7.27 104 5.7 8.03 145 214 4.6 0.105 0.031 10/03/18 12.9 6.93 104 4.1 2.72 153 212 4.25 0.071 0.020 11/06/18 4.8 7.07 38.9 4.2 5.27 59 79.4 1.35 0.059 0.018 Maximum 22.3 7.92 104.0 5.90 10.40 153 214 7.02 0.105 0.084 Minimum 1.9 6.39 38.9 2.80 2.57 59 79.4 1.31 0.047 < 0.010 Average 12.7 7.30 70.8 4.23 5.50 109 146 3.52 0.068 0.030 #Tests 9 9 9 9 9 9 9 9 9 9 0 0 Site: SW-03 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek,Mid ALPINE COUNTY SURFACEWATER QUALITY DATA 2018 Coliforms Fecal < Blue Green Algae > Single Hard- Total E.coli Strep < Colonies > < Filaments > <---Filamaments---> Cells D.O. SO4 ness Date MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 03/06/18 66.3 1 12 2.32 04/03/18 165.8 < 1 9.81 1.23 05/10/18 461.1 30.9 9.4 1.69 06/07/18 749 290.9 7.74 7.33 07/10/18 13340 7980 6.08 3.69 08/07/18 24810 1750 6.47 3.06 09/05/18 3880 1580 6.55 2.4 10/03/18 1480 308 7.79 2.62 11/06/18 770 121 10.57 2.38 Maximum 24,810 7,980 _ 0 0 _ 0 0 0 0 0 12.00 7.33 Minimum 66 < 1 0 0 0 0 0 0 0 6.08 1.23 Average 5,080 1,3408.49 2.97 #Tests 9 9 0 0 0 0 0 0 0 0 9 9 0 Site: SW-03 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek,Mid ALPINE COUNTY SURFACEWATER QUALITY DATA From 1981 To: 2018 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L 81 9.7 7.43 67 3.70 3 229 390 3.6 0.06 0.08 3.14 82 10.1 7.42 62 5.15 6 158 233 0.11 0.08 3.20 83 7.2 8.41 62 7.17 7 145 221 25.3 0.12 0.08 2.80 84 7.5 7.47 60 4.20 4 109 154 11.7 0.11 0.02 2.31 85 10.4 7.43 46 4.40 5 110 125 8.4 0.14 0.04 3.03 86 5.5 7.77 57 4.70 2 115 176 14.6 0.07 0.04 1.97 87 8.8 7.18 71 3.03 4 149 230 20.7 0.06 0.06 2.00 88 9.9 7.13 81 16.71 11 168 241 18.6 0.11 0.08 2.43 89 9.2 7.43 78 6.48 4.7 126 183 8.9 0.08 0.03 1.63 90 8.9 7.49 74 5.42 3.3 114 195 5.8 0.08 0.03 0.04 1.61 91 10.3 7.42 95 8.64 5.1 146 202 7.7 0.11 0.02 0.04 2.35 92 10.6 7.47 103 8.20 4.0 151 216 6.1 0.12 0.03 0.05 2.05 93 9.8 7.33 85 7.77 3.8 146 213 8.1 0.11 0.04 0.04 2.24 94 9.9 7.40 104 10.91 4.3 154 234 8.6 0.13 0.03 0.03 1.81 95 10.4 7.47 87 7.30 3.0 141 204 7.7 0.11 0.11 0.03 2.17 96 11.3 7.20 63 5.07 5.3 97 137 3.5 0.09 0.03 0.02 1.95 97 9.9 7.38 83 6.68 8.4 132 192 7.3 0.11 0.03 0.04 1.98 98 8.8 7.01 64 4.44 5.0 104 143 3.8 0.08 0.04 0.02 1.84 99 10.3 7.02 61 5.18 3.9 97 130 2.6 0.10 0.04 0.01 1.81 00 10.7 7.24 74 6.81 12.8 115 154 3.9 0.08 0.02 0.03 1.91 01 11.7 7.21 83 2.95 3.1 121 171 3.4 0.07 0.02 0.03 1.85 02 11.7. 7.15 100 7.82 7.8 142 199 4.0 0.11 0.02 0.03 2.36 03 11.6 7.41 83 9.23 8.5 123 165 3.4 0.12 0.02 0.03 2.10 04 11.2 7.21 88 7.36 8.5 130 174 3.9 0.11 0.01 0.04 2.07 05 9.9 7.24 81 4.74 3.7 127 152 3.9 0.09 0.02 0.03 1.74 06 9.5 7.08 52 9.39 12.2 90 87 2.2 0.08 0.02 0.05 1.45 07 10.4 7.49 83 4.53 5.4 121 157 3.2 0.08 0.02 0.02 2.06 08 9.4 7.84 70 5.07 5.4 113 155. 3.2 0.12 0.04 0.02 2.08 09 9.3 7.58 75 4.31 2.6 115 158 2.8 0.07 • 0.02 0.02 1.95 10 8.6 7.39 59 6.17 9.2 95 124 2.3 0.08 0.02 0.01 1.75 11 9.5 7.51 38 11.66 20.2 68 75 1.1 0.11 0.01 0.01 1.53 12 11.1 7.38 71 3.01 2.8 108 138 2.3 0.07 0.02 0.01 1.70 13 11.6 7.21 57 12.36 11.5 90 115 1.7 0.08 0.03 0.01 1.72 14 9.6 7.20 57 4.00 8.3 94 114 2.0 0.08 0.04 0.01 2.10 15 11.7 7.22 79 4.08 12.7 119 160 2.6 0.09 0.04 0.02 1.79 16 10.5 7.01 60 16.58 33.7 100 126 2.4 0.18 0.02 1.65 17 12.8 6.99 58 6.03 4.4 94 126 2.9 0.06 0.01 1.61 18 12.7 7.30 71 4.23 5.5 109 146 3.5 0.07 0.03 Maximum 12.8 8.41 104 16.71 33.7 229 390 25.3 0.18 0.11 0.08 3.20 Minimum 5.5 6.99 38 2.95 2.0 68 75 1.1 0.06 0.01 0.01 1.45 Average 10.1 7.36 72 6.72 7.1 123 171 6.2 0.10 0.03 0.03 2.05 #Tests 38 38 38 38 38 38 38 37 38 29 35 37 Site: SW-03 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek,Mid ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2018 Oil& TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Ca Mg Na SAR Na Year mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L % 81 0.34 0.04 1.07 7 1 1 82 0.45 0.02 0.61 15 1 1 83 0.46 0.07 < 0.01 0.45 0.45 14 1 < 1 84 0.41 0.12 0.01 0.09 0.50 13 2 1 13.50 3.80- 11.35 0.71 32.0 85 0.46 0.06 < 0.01 0.02 0.48 16 2 < 1 - 10.93 2.91 8.08 0.56 28.8 86 0.08 < 0.02 < 0.01 0.12 0.22 6 1 < 1 14.80 4.30 13.80 - 0.74 31.2 87 0.19 0.02 < 0.01 0.13 0.33 5 1 1 20.07 6.17 18.30 0.85 31.9 88 0.35 0.07 < 0.01 0.03 0.38 8 1 < 1 20.05 6.51 18.35 0.87 32.0 89 0.23 0.03 < 0.01 0.02 0.26 6 1.2 < 1 15.81 4.73 14.67 0.77 31.7 90 0.17 0.02 < 0.01 0.03 0.21 7 1.1 < 1 14.24 4.22 12.44 0.69 30.7 91 0.32 0.06 0.01 0.06 0.39 9 1.3 < 1 18.44 5.65 15.32 0.77 30.2 92 0.29 0.05 0.01 0.02 0.32 12 1.3 1 19.92 5.98 16.50 0.82 31.5 93 0.38 0.04 0.01 0.02 0.42 14 1.8 < 1 20.12 5.25 16.28 0.82 31.8 94 0.35 0.03 0.01 0.02 0.38 < 5 1.8 < 1 20.83 6.22 17.63 0.86 32.4 95 0.42 0.04 0.01 0.06 0.49 13 1.4 1 18.92 5.26 14.93 0.77 31.2 96 0.34 0.03 0.01 0.06 0.41 5 1.3 1 13.62 3.58 9.12 0.55 27.1 97 0.34 0.05 0.01 0.14 0.49 14 1.3 1 16.47 5.33 14.55 0.79 31.9 98 0.29 0.02 < 0.01 0.04 0.34 < 5 1.1 < 1 13.02 3.54 9.06 0.56 28.2 99 0.27 0.02 < 0.01 0.03 0.32 < 5 1.0 11.96 3.39 8.47 0.54 28.0 00 0.32 0.02 < 0.01 0.03 0.35 < 5 1.3 14.32 4.38 9.85 0.55 26.5 01 0.19 0.03 < 0.01 0.02 0.22 14 1.0 15.04 5.09 10.69 0.60 27.4 02 0.38 0.04 < 0.01 0.02 0.41 < 5 1.7 19.14 5.76 12.33 0.62 26.3 03 0.34 0.04 0.01 0.01 0.37 7 1.8 15.50 5.04 10.42 0.58 26.6 04 0.28 0.04 < 0.01 0.01 0.31 5 1.2 16.99 5.54 10.65 0.56 25.3 05 0.23 0.04 < 0.01 0.03 0.27 9 1.6 16.97 5.35 10.21 0.54 24.9 06 0.17 0.03 < 0.01 0.02 0.20 7 1.3 10.70 3.19 6.39 0.43 24.9 07 0.18 0.02 < 0.01 0.01 0.21 5 1.7 16.02 5.33 10.70 0.57 25.8 08 0.34 0.04 < 0.01 0.01 0.36 9 2.0 14.96 4.86 9.25 0.51 24.6 09 0.21 < 0.02 < 0.01 0.02 0.23 6 1.0 15.07 4.92 9.33 0.52 24.9 10 0.18 0.03 < 0.01 0.02 0.21 14 1.3 12.60 3.84 6.96 0.42 23.0 11 0.24 0.02 < 0.01 0.03 0.28 12 2.6 7.94 2.23 4.21 0.34 22.7 12 0.16 0.03 < 0.01 0.01 0.18 1.4 13.86 4.24 8.28 0.48 24.1 13 0.25 0.04 < 0.01 0.01 0.25 1.4 12.15 3.58 6.64 0.41 22.9 14 0.27 0.04 0.02 0.03 0.31 2.0 12.17 3.71 6.74 0.43 23.3 15 0.25 0.05 < 0.01 0.02 0.27 16.54 5.30 9.36 0.50 23.6 16 0.29 0.02 < 0.01 0.03 0.32 13.20 3.96 7.21 0.43 23.1 17 0.19 0.03 < 0.01 0.08 0.26 12.48 3.61 7.72 0.49 26.2 18 0.15 0.02 < 0.01 0.06 0.21 Maximum 0.46 0.12 0.02 0.45 1.07 -- 16 2.6 1 20.83 6.51 18.35 0.87 32.4 Minimum 0.08 < 0.02 < 0.01 0.01 0.18 < 5 1.0 < 1 7.94 2.23 4.21 0.34 22.7 Average 0.28 0.04 0.01 0.05 0.35 9 1.4 1 15.25 4.61 11.05 0.61 27.6 #Tests 38 38 36 36 38 31 34 18 34 34 34 34 34 , Site: SW-03 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek,Mid ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2018 • Coliforms Fecal/ Fecal < Blue Green Algae > Single Hard- Total E.coli Strep < Colonies > < Filaments > <---Filamaments---> Cells D.O. SO4 ness Year MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 81 3,786 3,243 182 5 17 22 216 5 203 13 82 1,920 690 3,091 1,766 15,701 61 415 18 470 6,490 83 280 160 50 4 13 6 33 3 178 10 8.65 8.77 67 84 930 170 190 5 3 2 2 166 14 22 8.65 3.40 53 85 12,215 12,215 135 0 0 0 0 16 17 0 7.75 1.67 40 86 95 40 _55 0 0 0 0 0 0 2,493 9.20 10.44 -55 87 127 53 73 0 0 0 0 0 0 185 8.72 13.80 67 88 1,490 1,317 2,208 0 0 0 0 115 4 1,916 9.25 14.38 110 89 1,283 633 185 0 0 . 0 0 69 4 946 8.72 7.28 90 1,298 302 3,223 2 0 0 0 0 0 0 7.74 6.32 27 91 1,810 1,207 160 29 221 0 1 0 0 0 7.23 7.79 52 92 2,365 2,051 230 0 0 6 47 0 0 0 7.05 6.63 63 93 1,059 704 35 41 305 2 7 0 0 0 7.51 6.76 69 94 2,299 2,109 135 0 0 0 0 0 0 0 8.14 6.56 93 95 828 645 90 0 0 0 0 0 0 0 8.30 6.87 45 96 1,793 211 90 0 0 0 0 0 0 0 9.56 3.71 42 97 • 1,374 523 90 0 0 0 0 0 0 0 9.27 5.38 72 98 525 325 90 51 377 3 54 0 0 0 9.25 3.66 44 99 1,688 734_ 680 0 0 0 0 0 0 0 8.79 3.74 00 982 491 95 0 0 0 0 0 0 0 8.61 3.47 01 1,498 611 90 0 0 0 0 4 63 0 8.78 2.00 02 1,799 712 93 0 0 0 0 0 0 0 8.09 2.19 03 3,181 1,606 167 0 0 0 0 0 0 0 7.22 2.19 04 1,703 141 217 0 0 0 0 0 0 0 7.84 2.09 05 2,310 ,1,826 23 0 0 0 0 0 0 0 7.36 1.94 06 1,452 486 59 0 0 0 0 0 0 0 8.37 1.50 07 2,001 1,918 1,222 0 0 4 20 0 0 0 7.57 2.15 08 2,147 1,542 260 0 0 0 0 0 0 0 7.53 2.48 - 09 4,282 991 57 0 0 0 0 0 0 0 7.07 2.62 10 3,238 1,436 4 0 0 3 11 0 0 0 7.50 2.18 11 1,913 309 51 0 0 0 0 0 0 0 9.16 1.25 12 1,450 1,338 26 0 0 0 0 0 0 0 8.04 2.12 13 3,061 1,311 27 0 0 0 0 0 0 0 8.43 1.91 14 3,152 2,580 122 0 0 0 0 0 0 0 8.66 3.08 15 1,552 431 8.75 2.62 16 10,015 2,332 9.75 3.41 17 1,987 226 8.79 2.31 18 5,080 1,340 8.49 2.97 Maximum 12,215 12,215 3,223 1,766 15,701 61 415 166 470 6,490 9.75 14.38 110 Minimum 95 40 4 0 0 0 0 0 0 0 7.05 1.25 27 Average 2,368 1,288 397 56 489 3 24 12 28 355 8.33 4.49 60 #Tests 38 38 34 34 34 34 34 34 34 34 36 36 15 Site: SW-03 Nitrate-Nitrogen Total Phosphorus 0.5 0.5 0.4 0.4 0.3 0.3 a) c) - E E - 0.2 0.2 0.1 — 0.1 .�� "lir - ANL 0.0 0.0 00 0\ 0b 0 03 0 C;\ 0� O^ 03 0 O cP ON 00 0 cg q o r 00 00 O, 00 ON 00 OD O\ Ob —�--Nitrate Linear(Nitrate) —4--Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 50 500 40 400 - 30 _ 300 - E 20A E E 200 Nir - 100 � Ask � - cti3 0C) 01 00 0^ 0 0 0� 0cb O" 0 Oh O'l 00 ,^ ,:'1 -10 ON ‘‘ 0' 0? 0� �1 CP c O'i 0. 0 0e' I(‘ —♦—Chlorides Linear(Chlorides) —4--TDS Linear(TDS) Site: SW-04 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek,Lower ALPINE COUNTY SURFACEWATER QUALITY DATA 2018 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K Date C pH mg/L NTU mg/L mg/L um hos mg/L mg/L mg/L mg/L mg/L 3/6/2018 1.9 7.44 71.6 11 21.5 113 154 2.57 0.102 0.012 4/3/2018 10.0 6.69 52.3 7.9 11.1 88 96.7 1.56 0.062 0.016 5/10/2018 16.6 7.84 40.8 7.4 21.2 75 _81 1.20 0.101 0.040 6/7/2018 17.1 7.63 38.6 13 30.2 84 79.3 0.938 0.12 0.021 7/10/2018 23.6 8.11 68.1 8.4 5.50 102 140 2.60 0.114 0.023 8/7/2018 18.2 7.81 64.5 28 42.6 117 132 2.23 0.335 0.121 9/5/2018 14.5 7.95 68.0 6.6 4.50 106 137 2.1 0.105 0.068 10/3/2018 12.0 7.45 69.3 6.5 3.48 111 140 2.03 0.117 0.027 11/6/2018 6.7 7.73 42.8 3.4 4.36 63 84.6 1.48 0.078 0.020 Maximum 23.6 8.11 71.6 28.00 42.60 117 154 2.60 0.335 0.121 Minimum 1.9 6.69 38.6 3.40 3.48 63 79.3 0.94 0.062 < 0.012 Average 13.4 7.63 57.3 10.24 16.05 95 116 1.86 0.126 0.039 #Tests 9 9 9 9 9 9 9 9 9 9 0 0 1 Site: SW-04 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek,Lower ALPINE COUNTY SURFACEWATER QUALITY DATA 2018 Coliforms Fecal < Blue Green Algae > Single Hard- Total E.coli Strep < Colonies > < Filaments > <---Filamaments---> Cells D.O. SO4 ness Date MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 3/6/2018 290.9 3.1 11.4 2.47 4/3/2018 204.6 1 9.64 2.09 5/10/2018 3255 110 8.58 2 6/7/2018 11199 360.97.91 1.47 7/10/2018 17220 1580 8.81 2.3 8/7/2018 36540 7120 8.43 1.78 9/5/2018 1970 727 9.41 1.4 10/3/2018 2700 613 10.1 1.71 11/6/2018 1410 111 10.48 2.38 Maximum 36,540 7,120 0 0 0 0 , 0 0 0 11.40 2.47 Minimum 205 < 1 0 0 0 0 0 0 0 7.91 1.40 Average 8,310 1,181 9.42 1.96 #Tests 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: 2018 Temp Alkalinity Turbidity - SS TDS EC Chloride Total P PO4-P Boron K Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L 81 12.4 8.02 68 2.68 5 174 260 5.2 0.08 0.05 3.69 82 10.1 7.51 59 4.46 11 133 194 0.09 0.06 2.37 83 7.6 8.04 51 5.60 9 111 173 17.4 0.10 0.06 2.20 84 10.7 7.58 64 3.86 13 116 187 15.8 0.08 0.05 2.33 85 10.8 7.58 67 4.44 9 127 219 19.9 0.08 0.33 2.60 86 9.1 7.80 47 4.86 6 109 140 10.6 0.07 0.02 1.73 87 9.0 7.09 61 2.64 4 127 195 17.0 0.05 0.03 2.46 88 9.1 7.43 51 4.53 10 93 122 3.8 0.07 0.02 1.72 89 10.0 7.42 60 15.81 44.8 103 134 4.4 0.14 0.02 2.17 90 8.6 7.57 58 4.10 11.3 89 122 2.6 0.09 0.04 0.03 1.73 91 8.9 7.44 62 5.48 15.3 99 133 3.3 0.11 0.03 0.02 2.20 92 9.2 7.82 63 2.10 3.8 99 135 2.9 0.07 0.03 0.03- 1.86 93 8.0 7.45 64 2.97 6.1 99 139 3.2 0.08 0.05 0.02 2.15 94 8.1 7.54 61 2.61 4.5 93 131 2.5 0.07 0.03 0.01 1.64 95 10.4 7.51 61 3.53 7.0 102 130 2.8 . 0.09 0.05 0.02 1.94 96 10.9 7.43 60 3.59 10.1 92 125 2.1 0.08 0.03 0.02 1.93 97 9.0 7.40 53 3.61 7.0 85 110 2.0 0.08 0.03 0.02 1.56 98 8.4 7.05 50 7.17 18.5 86 107 2.1 0.10 0.03 0.02 1.73 99 9.8 7.22 52 4.49 13.1 83 108 1.7 0.08 0.03 0.01 1.78 00 9.6 7.32 52 5.76 9.4 87 108 1.8 0.07 0.02 0.02 1.58 01 11.2 7.27 64 4.73 10.5 98 131 2.4 0.07 0.03 0.02 2.09 02 10.7 7.38 68 4.70 6.6 106 139 2.5 0.07 0.02 0.02 2.25 03 10.5 7.76 57 5.68 10.2 90 116 2.1 0.06 0.02 0.02 1.43 04 10.7 7.19 63 6.37 6.4 99 128 2.4 0.09 0.01 0.03 2.36 05 9.3 7.16 51 14.39 39.1 89 97 2.5 0.12 0.02 0.02 1.88 06 9.8 7.19 45 8.23 6.6 77 74 1.6 0.06 0.02 0.02 1.43 07 11.4 7.58 53 12.27 13.9 81 111 2.1 0.10 0.02 0.01 2.11 08 10.0 7.71 53 6.30 5.4 88 115 3.0 0.08 0.02 0.01 2.16 09 9.8 7.43 47 12.69 17.3 81 93 2.1 0.09 0.02 0.01 1.81 10 9.8 7.42 49 7.26 10.8 89 106 2.9 0.10 0.03 0.01 2.46 11 10.3 7.68 44 6.11 7.9 76 91 1.7 0.06 0.02 0.01 1.58 12 11.6 7.57 63 6.10 3.8 97 133 2.3 0.08 0.03 0.02 1.92 13 11.7 7.34 55 15.26 12.2 88 111 2.0 0.10 0.02 0.01 2.08 14 10.3 7.58 48 9.49 14.9 87 103 2.1 0.08 0.03 0.01 2.08 15 13.9 7.87 69 3.34 3.9 106 143 2.9 0.05 0.02 0.02 1.97 16 10.8 7.12 52 4.40 6.4 97 116 2.2 0.09 0.03 2.15 17 13.2 7.32 52 9.90 13.2 92 107 2.1 0.11 0.02 1.99 18 13.4 7.63 57 10.24 16.0 95 116 1.9 0.13 0.04 Maximum 13.9 8.04 69 15.81 44.8 174 260 19.9 0.14 0.05 0.33 3.69 Minimum 7.6 7.05 44 2.10 .3.8 76 74 1.6 0.05 0.01 0.01 1.43 Average 10.2 7.48 57 6_36 11.1 99 132 4.4 0.08 0.03 0.03 2.03 #Tests 38 38 38 38 38 38 38 37 38 29 35 37 Site: SW-04 - SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek,Lower ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2018 Oil& TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Ca Mg Na SAR Na Year mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L % 81 0.46 0.04 0.56 13 1 1 82 0.39 0.02 0.58 13 1 < 1 83 0.46 0.05 < 0.01 0.37 0.57 12 1 < 1 84 0.37 0.09 0.01 0.09 0.46 9 1 < 1 16.49 4.54 12.17 0.66 28.3 85 0.34 0.05 0.01 0.20 0.57 10 1 < 1 16.41 4.43 14.70 0.74 28.7 86 0.44 0.10 0.01 0.28 0.73 11 2 < 1 10.28 3.40 8.11 0.57 29.1 87 0.28 0.04 < 0.01 0.06 0.35 8 1 < 1 14.34 4.58 14.98 0.80 28.7 88 0.29 0.04 < 0.01 0.01 0.32 8 1 < 1 12.41 3.87 6.78 0.43 23.2 89 0.51 0.07 < 0.01 0.04 0.56 15 1.3 < 1 13.40 4.03 7.07 0.42 22.2 90 0.21 0.02 < 0.01 0.02 0.24 7 1.1 < 1 12.55 3.78 6.51 0.40 22.3 91 0.40 0.05 0.01 0.05 0.45 24 1.3 < 1 13.81 4.02 8.16 0.48 23.0 92 0.29 0.03 0.01 0.02 0.32 26 1.2 1 13.67 4.03 7.23 0.44 22.6 93 0.43 0.04 0.01 0.06 0.49 14 1.4 < 1 14.23 4.10 7.38 0.44 22.5 94 0.30 0.02 0.01 0.04 0.35 9 1.0 < 1 13.18 3.93 6.90 0.42 22.7 95 0.57 0.02 0.01 0.05 0.63 12 1.3 1 13.54 3.64 6.71 0.41 22.0 96 0.40 0.02 0.01 0.05 0.46 6 1.3 1 13.26 3.70 6.68 0.41 22.4 97 0.38 0.04 0.01 0.13 0.53 10 1.4 1 12.09 3.53 6.13 0.39 22.2 98 0.43 0.02 < 0.01 0.03 0.47 6 1.3 < 1 10.62 3.10 5.83 0.40 23.5 99 0.31 < 0.02 < 0.01 0.02 0.34 6 1.2 10.44 3.15 6.30 0.44 24.7 00 0.32 < 0.02 < 0.01 0.02 0.36 < 5 1.1 10.45 3.25 5.69 0.39 23.0 - 01 ,0.32 < 0.03 < 0.01 0.01 0.34 23 1.1 13.30 4.06 6.88 0.43 22.5 02 0.41 0.04 < 0.01 < 0.01 0.43 < 5 1.2 14.26 4.11 7.02 0.42 22.2 03 0.33 0.03 < 0.01 < 0.01 0.36 11 1.1 11.57 3.64 6.40 0.42 23.3 04 0.36 0.05 < 0.01 0.01 0.38 13 0.9 12.75 3.94 5.94 0.37 20.4 05 0.46 0.03 < 0.01 0.04 0.51 19 1.7 11.15 3.43 5.74 0.38 21.9 06 0.21 0.03 < 0.01 0.04 0.25 9 1.2 9.52 2.78 4.96 0.37 22.9 07 0.43 0.02 < 0.01 0.02 0.46 9 2.7 11.35 3.48 6.00 0.40 22.4 08 0.35 < 0.02 < 0.01 0.14 0.50 19 1.4 11.22 3.37 6.26 0.42 23.4 • 09 0.38 0.02 < 0.01 0.04 0.43 11 1.1 9.83 3.06 5.63 0.40 23.7 10 0.32 0.02 < 0.01 0.03 0.36 7 1.6 10.39 3.10 6.05 0.42 23.6 11 0.19 0.02 < 0.01 0.04 0.24 8 1.5 9.10 2.75 5.15 0.38 23.4 12 0.23 0.03 < 0.01 0.01 0.25 1.4 12.50 3.79 7.12 0.44 23.6. 13 0.33 0.03 < 0.01 0.01 0.28 1.7 11.76 3.50 6.19 0.40 22.4 14 0.33 0.04 < 0.01 0.24 0.57 1.6 10.75 3.21 5.93 0.41 23.2 15 0.17 0.02 < 0.01 0.01 0.17 14.42 4.84 8.35 0.48 23.8 16 0.35 0.02 < 0.01 0.12 0.47 11.59 3.31 5.95 0.39 22.3 17 0.38 0.03 < 0.01 0.14 0.52 11.23 3.14 6.22 0.42 23.9 18 0.35 0.02 < 0.01 0.06 0.41 Maximum 0.57 0.10 0.01 0.37 0.73 26 2.7 1 16.49 4.84 14.98 0.80 29.1 Minimum 0.17 < 0.02 < 0.01 < 0.01 0.17 < 5 0.9 < 1 9.10 2.75 4:96 0.37 20.4 Average 0.35 0.03 0.01 0.07 0.43 12 1.3 1 12.29 3.66 7.15 0.45 23.5 #Tests 38 38 36 36 38 31 34 18 34 34 34 34 34 Site: SW-04 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek,Lower ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2018 Coliforms Fecal/ Fecal < Blue Green Algae > Single Hard- Total E.coli Strep < Colonies > < Filaments > <---Filamaments---> Cells D.O. SO4 ness . Year MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 81 2,977 1,408 898 24 132 94 1,007 1 101 7 82 1,946 321 421 18 56 40 400 12 292 318 83 1,472 302 125 5 12 14 141 7 312 0 9.00 6.52 53 84 1,950 324 392 188 5 56 2 130 10 244 8.78 3.74 64 85 2,573 480 108 0 0 0 0 54 5 0 8.21 6.28 58 86 313 113 566 0 0 0 0 0 0 3,255 8.82 9.29 43 87 3,249 231 161 0 0 0 0 323 3 1,685 8.53 14.11 60 88 2,358 177 170 0 0 46 277 162 6 0 9.14 5.55 54 89 3,936 1,244 850 0 0 0 0 139 7 1,593 7.62 5.22 90 570 110 175 2 0 0 1 0 1 0 7.75 4.83 32 91 2,095 1,462 1,245 0 0 0 3 0 0 0 8.25 5.46 41 92 937 55 485 3 188 9 144 0 0 0 9.03 4.70 55 93 1,453 387 95 0 0 0 0 0 0 0 8.56 4.97 40 94 293 76 260 0 0 0 0 0 0 0 8.17 4.97 36 95 2,183 1,260 110 0 0 0 0 0 0 0 8.87 5.35 38 96 3,268 637 235 0 0 0 0 0 0 0 8.15 2.98 38 97 2,298 226 120 0 0 0 0 0 0 0 9.40 3.50 41 98 3,105 2,549 320 0 0 0 0_ 0 0 0 8.90 3.30 37 99 920 188 90 0 0 0 0 0 0 0 8.48 3.37 00 1,119 194 55 0 0 0 0 0 0 0 8.36 2.70 01 630 235 320 0 .0 0 0 0 0 0 8.78 1.51 02 1,503 305 330 0 0 0 0 0 0 0 8.46 1.45 03 489 52 512 0 0 0 0 0 0 0 6.82 1.47 04 2,245 171 92 0 0 0 0 0 0 0 7.37 1.40 05 1,534 407 152 0 0 0 0 0 0 0 7.77 1.70 06 2,010 305 58 0 0 0 0 0 0 0 7.53 1.15 07 913 97 1,222 0 0 0 0 0 0 0 6.38 1.69 08 1,080 893 5,965 0 0 4 48 0 0 0 7.70 2.10 09 3,324 571 217 0 0 7 62 0 0 0 8.30 2.01 10 3,325 2,022 13 0 0 0 0 0 0 0 7.81 2.07 11 1,694 80 22 0 0 0 0 0 0 0 8.10 1.42 12 1,518 917 80 0 0 6 77 0 0 0 6.71 1.78 13 3,119 76 27 0 0 0 0 0 0 0 6.68 1.73 14. 4,756 1,614 242 0 0 0 0 0 0 0 9.37 3.01 15 1,821 160 9.53 2.15 16 4,132 360 9.33 2.71 • 17 9,707 1,348 9.21 1.77 18 8,310 1,181 - 9.42 1.96 Maximum 9,707 2,549 5,965 188 188 94 1,007 323 312 3,255 9.53 14.11 64 Minimum 293 52 13 0 0 0 0 0 0 0 6.38 1.15 32 Average 2,398 593 474 7 12 8 64 24 22 209 8.31 3.61 46 #Tests 38 38 34 34 34 34 34 34 34 34 36 36 15 Site: SW-04 Nitrate-Nitrogen Total Phosphorus 0.5 0.5 0.4 0.4 0.3 0.3 J J - O) _ 8) E 0.2 E 0.2 0.1 A , 0.1 wr y I I I I II 0.0 r I I 0.0 �, M �, �, M M �- M to h �-- M In 1� O7 M l() 1� M r M In 1� 00 00 00 00 GD 7 '8 SI O O O O O r V V 00 00 00 00 00 W- CI SI O O O O O r V V ---♦—Nitrate Linear(Nitrate) —t—Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 50 - 500 - - 40 _ 400 30 - 300 J_ 11 20 CD 200 - 10 100 0 rMI 00 IM III 7 II II rai ISI IO I Imo, I 8 I 7 I IM V r 0 - - - l I '- M to I I� 2 M In h r M 8 h M In 1� -10 —f—Chlorides Linear(Chlorides) —+—TDS Linear(TDS) Site: SW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River, Paynesville ALPINE COUNTY SURFACEWATER QUALITY DATA 2018 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K Date C pH mg/L NTU mg/L mg/L um hos mg/L mg/L mg/L mg/L mg/L 01/03/18 3.4 - 7.69 36 0.85 0.76 58 75.9 1.14 0.013 < 0.010 02/01/18 4.0 7.50 35.1 1.0 1.28 65 74.8 1.32 0.012 < 0.010 03/06/18 0.7 6.88 37.3 1.3 1.64 64 82.8 1.54 0.02 < 0.010 04/03/18 7.8 7.76 27.7 3.4 8.39 50 59.3 1.51 0.032 < 0.010 05/10/18 6.8 7.68 23.8 3.0 7.51 44 46 0.96 0.032 0.025 06/07/18 10.7 7.12 28.6 2.0 4.01 59 57.4 0.79 0.027 0.010 07/10/18 19.8 8.25 39 1.2 1.35 66 80.5 1.18 0.036 < 0.010 08/07/18 16.5 8.47 36 1.2 1.91 55 74.5 1.09 0.033 0.022 09/05/18 13.5 7.83 43.4 0.82 1.37 71 92 1.1 0.027 < 0.010 10/03/18 11.8 7.66 41.4 2.0 1.60 85 103 5.74 0.027 0.013 11/06/18 6.6 8.42 43.6 1.0 0.51 66 91.5 1.80 0.047 0.012 12/04/18 1.2 8.03 42.9 0.75 0.72 73 108 3.53 0.018 < 0.013 Maximum 19.8 8.47 43.6 3.40 8.39 85 108.0 5.740 0.047 0.025 Minimum 0.7 6.88 23.8 0.75 0.51 44 46.0 0.786 0.012 < 0.010 Average 8.6 7.77 36.2 1.54 2.59 , 63 78.8 1.808 0.027 0.013 #Tests 12 12 12 12 12 12 12 12 12 12 0 0 Site: SW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Paynesville ALPINE COUNTY SURFACEWATER QUALITY DATA 2018 Coliforms Fecal < Blue Green Algae > Single Hard- Total E. coli Strep < Colonies > < Filaments > <---Filamaments---> Cells D.O. SO4 ness Date MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 01/03/18 78.9 2 11.64 2.09 02/01/18 68.3 13.4 10.87 1.98 03/06/18 29.2 1 12.6 2.24 04/03/18 95.9 3 11.4 1.16 05/10/18 325.5 18.5 11.6 1.53 06/07/18 1203.3 488.4 9.62 1.24 07/10/18 3590 218.7 8.11 1.71 08/07/18 > 241920 > 241920 • 8.5 1.72 09/05/18 2590 325.5 8.03 1.7 10/03/18 1410 43.2 9.88 2.02 11/06/18 178 20.3 10.81 2.94 12/04/18 109 6.3 12.3 3.55 Maximum > 241,920 > 241,920 0 0 0 0 0 0 0 12.60 3.55 Minimum 29 < 1 0 0 0 0 0 0 0 8.03 1.16 Average 20,967 20,255 10.45 1.99 ,#Tests 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: 2018 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L 81 9.9 7.93 36 1.15 4 64 78 1.8 0.03 0.01 1.52 82 6.4 7.61 28 2.57 23 49 57 0.04 0.02 1.11 83 6.0 7.73 30 2.45 8 43 60 0.9 0.03 0.03 1.17 84 8.4 7.78 33 2.08 13 49 70 1.2 0.04 0.02 1.46 85 7.6 7.86 37 5.11 9 50 78 1.7 0.05 0.24 2.20 _ 86 6.5 7.91 32 1.92 6 53 67 1.4 0.03 0.01 1.35 87 9.7 7.54 42 1.09 4 68 91 2.1 0.04 0.01 1.88 88 9.2 7.69 42 1.10 4 80 100 3.3 0.02 0.02 1.81 89 8.7 7.75 36 1.65 7.3 60 88 2.2 0.03 0.02 1.92 90 9.4 7.77 40 1.61 4.8 73 96 2.0 0.04 0.02 0.02 1.73 91 9.9 7.73 40 2.11 6.3 71 86 2.3 0.04 0.01 0.02 1.70 92 9.3 8.01 40 1.37 4.6 69 90 2.0 0.03 0.01 0.02 1.65 93 7.2 7.80 33 2.01 7.0 58 77 1.7 0.03 0.01 0.02 1.40 94 8.8 7.93 39 1.10 2.4 66 88 1.5 0.03 0.01 0.01 1.68 95 7.1 7.69 31 1.70 10.7 54 68 1.4 0.03 0.01 0:01 1.28 96 9.1 7.57 32 1.18 5.8 59 72 1.4 0.03 0.01 0.02 1.37 97 8.1 7.49 32 6.29 19.3 59 68 1.1 0.05 0.01 0.02 1.46 98 6.8 7.27 33 1.31 5.0 56 72 1.4 0.02 0.01 0.01 1.43 99 8.1 7.37 33 1.12 3.7 59 74 1.5 0.03 0.01 0.01 1.61 00 7.3 7.33 35 1.34 6.3 61 77 1.4 0.03 0.01 0.02 1.53 01 11.4 7.49 38 1.63 3.6 62 84 1.6 0.02 0.01 0.01 1.72 02 8.6 7.46 37 1.62 2.8 64 80 1.8 0.02 < 0.01 0.01 1.57 03 9.0 7.68 36 4.27 10.5 61 74 1.8 0.03 0.01 0.01 1.50 04 8.7 7.35 36 3.97 10.4 62 76 1.8 0.03 0.01 0.02 1.56 05 7.9 7.26 34 2.98 5.6 59 62 2.0 0.02 0.01 0.02 1.41 06 8.0 7.25 29 3.58 6.7 53 49 1.4 0.03 0.01 0.02 1.24 07 9.9 7.70 36 1.79 3.4 63 76 1.6 0.02 < 0.01 0.01 1.60 08 7.7 7.71 36 1.94 2.8 61 72 1.8 0.02 < 0.01 0.01 1.61 09 7.5 7.55 35 2.97 5.2 58 74 1.5 0.02 < 0.01 0.01 1.49 10 5.9 7.51 33 3.55 5.6 59 73 1.5 0.02 0.01 < 0.01 1.52 11 5.8 7.62 31 3.51 6.5 57 66 1.1 0.03 0.01 0.01 1.37 12 8.2 7.46 37 1.95 3.1 61 78 1.3 0.02 0.01 0.01 1.58 13 8.7 7.41 35 1.69 2.9 60 72 1.2 0.02 0.01 0.01 1.40 14 7.8 7.54 39 1.29 2.0 65 83 1.5 0.02 0.01 0.01 1.62 15 8:8 7.35 38 1.72 2.6- 68 85 1.4 - 0.02 0.01 0.01 1.59 16 7.1 7.08 33 2.42 5.0 63 73- 1.6 0.03 < 0.01 1.42 17 6.8 7.25 30 2.77 6.2 55 65 1.3 0.03 0.01 1.14 8.6 7.77 36 1.54 2.6 63 79 1.8 0.03 0.01 Maximum 11.4 8.01 42 6.29 23.0 80 100 3.3 0.05 0.02 0.24 2.20 Minimum 5.8 7.08 28 1.09 2.0 43 49 0.9 0.02 < 0.01 0.01 1.11 Average 8.2 7.58 35 2.25 6.4 60 76 1.6 0.03 0.01 0.02 1.53 #Tests 38 38 38 38 38 38 38 37 38 29 35 37 Site: SW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Paynseville ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2018 Oil& TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Ca Mg Na SAR Na Year mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L % 81 0.23 0.03 0.32 6 1 < 1 82 0.19 0.01 0.29 9 1 1 83 0.19 0.05 < 0.01 0.04 0.23 7 1 < 1 84 0.27 0.08 0.01 0.03 0.30 5 1 1 6.85 1.93 3.42 0.29 21.1 85 0.24 0.04 < 0.01 0.04 0.28 7 1 < 1 7.81 2.15 3.85, 0.31 21.0 86 0.19 0.04 < 0.01 0.05 0.24 5 1 1 6.70 1.90 3.11 0.26 19.9 87 0.21 0.03 < 0.01 0.06 0.28 5 1 < 1 8.73 2.53 4.93 0.37 23.2 88 0.21 0.03 < 0.01 0.09 0.32 5 1 < 1 9.49 2.76 5.88 0.41 24.7 . 89 0.20 0.03 < 0.01 0.06 0.27 6 1.1 < 1 7.90 2.22 4.20 0.33 21.6 90 0.18 0.02 < 0.01 0.07 0.26 6 1.0 2 8.99 2.45 4.92 0.36 22.9 91 0.20 0.03 0.01 0.11 0.31 10 1.0 < 1 8.77 2.42 4.73 0.35 22.7 92 0.20 0.03 0.01 0.04 0.25 8 1.0 1 8.89 2.33 4.74 0.36 23.0 93 . 0.21 0.03 0.01 0.06 0.28 8 1.2 < 1 7.81 2.05 3.83 0.30 21.2 94 0.19 0.02 0.01 0.04 0.25 < 5 1.0 < 1 8.69 2.29 4.74 0.36 23.4 95 0.26 0.02 0.01 0.04 0.31 7 1.0 1 7.24 1.85 3.64 0.30 21.9 96 0.24 0.02 0.01 0.05 0.31 2 1.2 1 7.40 1.93 3.82 0.31 22.3 97 0.16 0.03 0.01 0.10 0.27 5 1.0 1 7.34 2.09 3.86 0.32 22.3 98 0.18 0.02 < 0.01 0.05 0.24 < 5 0.9 < 1 6.85 1.89 3.79 0.32 23.2 99 0.23 < 0.02 < 0.01 0.04 0.28 < 5 1.0 7.03 1.97 4.05 0.34 23.8 00 0.16 0.02 0.01 0.03 0.19 < 5 1.0 6.79 2.05 4.29 0.37 25.0 01 0.18 0.02 < 0:01 0.02 0.21 15 1.0 8.07 2.24 4.96 0.39 25.0 02 0.22 0.03 < 0.01 0.02 0.25 < 5 0.9 7.80 2.14 4.86 0.39 25.4 03 0.21 0.03 0.01 0.03 0.25 6 0.9 7.65 2.19 4.59 0.37 24.7 04 0.19 0.03 < 0.01 0.03 0.23 8 0.7 7.51 2.21 4.53 0.37 24.3 05 0.20 0.02 < . 0.01 0.03 0.24 12 1.3 7.45 2.07 4.26 0.35 23.8 06 0.13 0.02 < 0.01 0.02 0.16 8 0.9 6.51 1.80 3.39 0.30 21.6 07 0.14 0.02 < 0.01 0.01 0.16 8 1.1 7.90 2.20 4.87 0.39 25.1 08 0.18 < 0.02 < 0.01 0.01 0.20 8 1.0 7.98 2.16 4.79 0.38 24.9 09 0.17 0.02 < 0.01 0.01 0.20 11 0.8 7.70 2.01 4.45 0.36 24.5 10 0.10 0.02 < 0.01 0.01 0.12 34 1.1 7.44 2.06 4.14 0.34 23.3 11 0.10 0.02 < 0.01 0.02 0.13 8 1.4 6.71 1.82 3.58 0.31 22.7 12 0.13 0.23 < 0.01 0.01 0.15 1.4 7.81 2.06 4.34 0.35 23.6 13 0.14 0.03 < 0.01 0.02 0.15 1.0 • 7.93 2.00 4.29 0.35 23.5 14 0.13 0.03 < 0.01 0.01 0.14 1.0 8.41 2.20 4.95 0.39 25.0 15 0.14 < 0.02 < 0.01 0.01 0.14 8.85 2.27 4.93 0.38 24.1 16 0.16 < 0.02 < 0.01 0.03 0.18 7.81 2.03 4.32 0.35 23.8 17 0.15 0.02 < 0.01 0.02 0.16 6.92 1.80 3:49 0.30 22.2 0.12 0.02 < 0.01 0.02 0.13 Maximum 0.27 -_0.23 0.01 0.11 0.32 34 1.4 2 9.49 2.76 5.88 0.41 25.4 Minimum 0.10 0.01 < 0.01 0.01 0.12 2 0.7 < 1 6.51 1.80 3.11 0.26 19.9 Average 0.18 0.03 0.01 0.04 0.23 8 1.0 1 7.76 2.12 4.31 0.35 23.3 #Tests 38 38 36 36 38 31 34 18 34 34 34 34 34 Site: SW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Paynseville ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2018 Coliforms Fecal/ Fecal < Blue Green Algae > Single Hard- Total E.coli Strep < Colonies > < Filaments > <---Filamaments---> Cells D.O. SO4 ness Year MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 81 1,388 - 700 492 173 2,303 36 230 2 81 11 82 506 456 226 26 60 62 738 10 285 16 83 1,198 1,048 360 6 12 18 158 22 396 4 9.37 4.05 26 84 2,506 822 286 90 56 16 36 368 41 180 9.22 1.44 23 85 2,904 1,227 299 0 0 52 280 58 1 139 9.13 2.25 29 86 2,951 1,179 378 0 0 23 346 46 1 23 `9.63 9.08 27 87 2,643 607 348 0 0 0 0 208 4 5,194 9.48 5.71 32 88 815 238 93 0 0 0 0 705 25 1,158 11.15 5.26 89 945 511 228 0 0 0 0 600 24 1,685 9.81 4.47 90 1,343 232 450 0 46 0 0 0 0 0 8.83 4.96 31 91 398 83 230 0 0 0 0 0 0 0 9.05 5.22 30 92 886 181 65 0 0 0 0 0 0 0 9.80 5.06 30 93 886 491 680 0 0 0 0 0 0 0 10.50 4.33 26 94 1,390 672 90 0 0 3 70 0 0 0 9.93 5.27 33 95 218 41 90 0 0 0 0 0 0 0 9.82 . 4.64 24 96 918 248 55 0 0 0 0 0 0 0 8.93 2.57 26 97 243 • 41 65 0 0 0 0 0 0 0 9.88 3.26 26 98 585 80 35 0 0 18 132 0 0 0 9.97 2.47 21 99 718 83 35 0 0 0 0 0 0 0 9.41 2.50 00 263 90 30 0 0 0 0 0 0 0 10.02 2.70 01 210 58 40 0 0 0 0 0 0 0 9.29 2.60 02 250 78 82 0 0 0 0 0 0 0 9.63 2.70 03 334 54 33 0 0 0 0 0 0 0 8.65 2.39 04 316 51 7 0 0 0 0 0 0 0 8.95 2.73 05 72 29 51 4 266 35 216 0 0 0 10.13 2.56 06 259 77 23 0 0 0 0 0 0 0 9.86 1.60 07 202 63 33 0 _ 0 0 0 0 0 0 9.33 2.42 08 512 98 162 • 0 0 0 0 4 821 0 9.84 2.86 09 333 106 48 0 0 - 0 0 0 0 0 9.90 2.54 10 983 949 68 0 0 0 0 0 0 0 9.37 2.49 11 389 143 9 0 0 3 54 0 0 0 10.50 1.64 12 321 74 4 0 0 0 0 0 0 0 9.14 2.28 13 740 62 7 0 0 0 0 0 0 0 9.71 2.30 14 - 1,545 108 6 0 0 0 0 0 0 0 9.62 2.63 15 1,087 104 10.46 2.75 16 1,167 59 11.46 2.39 17 581 37 10.45 1.49 20,967 20,255 10.45 1.99 Maximum 20,967 20,255 680 173 2,303 62 738 705 821 5,194 11.46 9.08 33 Minimum 72 29 4 0 0 0 0 0 0 0 8.65 1.44 21 Average 1,420 827 150 9 81 8 66 - 59 49 247 9.74 3.27 27 #Tests 38 38 34 34 34 34 34 34 34 34 36 36 14 Site: SW-05 Nitrate-Nitrogen Total Phosphorus 0.5 0.5 - 0.4 0.4 0.3 0.3 _ J - J O) - Q) E - E - 0.2 0.2 0.1 alik A 0.1 33 43 00 0^ 03 00 O'\ 0°3 O^ 03 Oh 61 0 0 Kk Ol\ 03 00 01 00 ON 0 Oh 4 00. O^ O'S 00 O'l O' ,\r� �� ,\y ,\1 —f—Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 10 -_ 250 - 9 8 - 200 7 6 150 -J E = E 4 - 100 3 _ • 2 „ .__i► _ - 50 0 - 0 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 O\ 0 3 O 00 0 03 0 c;\ 00 O O' OP O O°' 4` � '�' r1 —4-—Chlorides Linear(Chlorides) TDS Linear(TDS) Site: SW-06 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Stateline ALPINE COUNTY SURFACEWATER QUALITY DATA 2018 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L . mg/L 01/03/18 2.6 7.89 38 1.2 5.24 64 80 1.28 0.028 < 0.010 02/01/18 3.6 7.36 35.7 0.9 1.60 59 79.3 1.44 0.017 < 0.010 03/06/18 1.6 7.4 37.5 1.2 1.61 60 84.3 1.68 0.018 < 0.010 04/03/18 5.2 7.65 26.5 4.2 8.41 51 57.7 1.55 0.035 < 0.010 -05/10/18 7.3 7.75 24.4 3.7 8.14 44 48 0.986 0.034 0.025 06/07/18 11.4 7.4 29.8 2.5 4.19 62 61.8 0.957 0.028 < 0.010 07/10/18 22.1 7.84 41.6 0.9 0.68 70 85.8 1.58 0.035 < 0.010 08/07/18 19.2 8.32 43.4 0.8 0.95 71 92.5 1.65 0.023 0.012 09/05/18 15.4 8.35 45.4 0.6 1.09 74 98 1.3 0.023 < 0.010 10/03/18 12.7 8.04 42.2 1.5 2.92 93 130 13.5 0.02 < 0.010 11/06/18 7.4 8.08 45.6 0.7 0.39 74 . 96 2.13 0.053 0.011 12/04/18 1.7 8.25 44.5 0.8 0.23 80 113 3.96 0.012 < 0.013 Maximum 22.1 8.35 45.6 4.20 8.41 93 130.0 13.50 0.053 < 0.025 Minimum 1.6 7.36 24.4 0.60 0.23 44 48.0 0.96 0.012 < 0.010 Average 9.2 7.86 37.9 1.58 2.95 67 85.5 2.67 0.027 0.012 #Tests 12 12 12 12 12 12 12 12 12 12 0 0 Site: SW-06 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Stateline ALPINE COUNTY SURFACEWATER QUALITY DATA 2018 Coliforms Fecal < Blue Green Algae > Single Hard- Total E.coli Strep < Colonies > < Filaments > <---Filamaments---> Cells D.O. SO4 ness Date MPN MPN MPN # cells # cells # urn #cells mg/L mg/L mg/L 01/03/18 95.9 14.5 11.88 2.21 02/01/18 81.3 3.1 11.32 2.17 03/06/18 49.6 2 12.2 2.35 04/03/18 139.6 3.1 11 1.19 05/10/18 387.3 55.6 11.1 1.55 06/07/18 1553.1 517.2 9.61 1.35 07/10/18 7940 365.4 7.58 2.11 08/07/18 2850 42.8 8.99 2.47 09/05/18 1553.1 90.7 9.18 1.8 10/03/18 2420 93.2 .9.83 2.12 11/06/18 225 41 11.01 3.11 12/04/18 90.7 16 12.5 3.82 Maximum 7,940 517 0 0 0 0 0 0 0 12.50 3.82 Minimum 50 < 2 0 0 0 0 0 0 0 7.58 1.19 Average 1,449 104 10.52 2.19 #Tests 12 12 0 0 0 0 0 0 0 0 12 12 0 Site: SW-06 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Stateline ALPINE COUNTY SURFACEWATER QUALITY DATA From 1981 • To: 2018 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L 81 10.7 7.75 38 1.00 3 69 83 1.8 0.02 0.01 1.72 82 83 8.9 7.70 32 3.43 11 55 63 1.1 0.04 0.03 1.46 84 10.1 7.72 38 2.42 10 56 82 2.2 0.04 0.02 1.59 85 9.5 7.84 42 1.88 4 63 99 4.00.03 0.30 1.85 86 7.2 7.90 35 1.98 7 58 76 2.3 0.03 0.01 1.47 87 10.6 7.36 48 1.38 4 79 110 4.3 0.03 0.02 2.19 88 10.7 7.59 48 3.46 9 90 125 6.1 0.04 0.02 2.10 89 9.8 7.69 42 1.72 6.5 77 109 5.0 0.03 0.02 1.75 90 9.6 7.82 .47 1.86 3.0 88 118 4.9 0.03 0.02 0.02 2.06 91 9.4 7.62 45 1.82 5.2 78 107 4.4 0.05 0.01 0.02 1.95 92 10.1 7.81 45 1.83 3.8 79 113 4.2 0.03 0.01 0.02 1.88 93 7.8 7.72 35 2.13 8.3 63 82 2.2 0.03 0.01 0.02 1.54 94 9.9 7.85 42 0.91 2.3 72 98 2.4 0.03 0.01 0.02 1.80 95 8.0 7.62 32 1.86 11.7 61 75 2.0 0.04 0.01 0.01 1.34 96 9.7 7.51 35 1.69 5.4 63 80 2.1 0.03 0.01 0.02 1.46 97 9.1 7.53 34 2.53 8.2 62 76 1.7 0.04 0.01 0.02 1.73 98 8.9 7.31 35 1.64 5.6 61 78 2.0 0.03 0.01 0.01 1.49 99 10.5 7.33 33 1.09 6.7 60 78 1.6 0.03 < 0.01 0.02 1.59 00 10.0 7.30 36 1.69 6.9 66 82 2.2 0.03 < 0.01 0.02 1.61 01 12.4 7.46 38 1.96 4.0 65 92 2.2 0.02 0.01 0.01 1.74 02 11.0 7.66 36 1.84 3.9 64 81 2.2 0.03 < 0.01 0.02 1.59 03 9.7 7.61 37 3.29 6.6 67 84 2.5 0.03 0.01 0.02 1.65 04 10.5 7.52 37 4.30 9.6 65 81 2.3 0.03 < 0.01 0.02 1.56 05 9.3 7.37 34 2.98 5.8 61 69 2.6 0.02 < 0.01 0.02 1.47 06 9.2 7.11 30 3.61 8.5 54 49 1.5 0.03 < 0.01 0.02 1.27 07 11.7 7.73 33 2.03 3.9 63 83 2.1 -0.02 < 0.01 0.01 1.77 08 11.5 7.94 38 1.56 2.4 63 86 2.8 0.03 < 0.01 0.01 1.86 09 9.5 7.73 36 2.71 5.8 65 80 2.1 0.02 < 0.01 0.01 1.63 10 8.1 7.60 32 3.16 5.9 57 72 1.6 0.03 0.01 0.01 1.62 11 8.3 7.73 31 3.97 9.1 56 68 1.3 0.04 0.01 0.01 1.60 12 11.0 7.29 40 1.66 3.1 62 81 1.5 0.02 0.01 0.01 1.67 13 11.2 7.51 36 2.15 4.0 62 74 1.4 0.03 0.01 0.01 1.45 14 9.7 7.57 39 1.18 2.2 67 89 2.0 0.02 0.01 0.01 1.84 15 9.1 7.36 40 2.06 5.2 69 88 1.9 0.02 < .0.01 0.02 1.66 16 7.8 7.21 34 2.37 5.2 66 76 1.9 0.03 < 0.01 1.47 17 7.1 7.29 31 3.11 8.1 56 67 1.4 0.03 < 0.01 1.19 18 9.2 7.86 38 1.58 3.0 67 86 2.7 0.03 0.01 Maximum 12.4 7.94 48 4.30 11.7 90 125 6.1 0.05 0.02 0.30 2.19 Minimum 7.1 7.11 30 0.91 2.2 54 49 1.1 0.02 < 0.01 0.01 1.19 Average 9.6 7.58 37 2.21 5.9 66 85 2.5 0.03 0.01 0.02 1.66 #Tests 37 37 37 37 37 37 37 37 37 29 34 36 Site: SW-06 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Stateline ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2018 Oil& TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Ca Mg Na SAR Na Year mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L % 81 0.22 0.04 0.30 6 1 < 1 82 83 0.18 0.02 < 0.01 0.02 0.21 7 1 < 1 84 0.27 0.07 < 0.01 0.02 0.29 6 1 < 1 • 8.06 2.37 3.69 0.29 19.9 85 0.21 0.04 < 0.01 0.02 0.24 7 1 < 1 9.81 2.83 4.91 0.35 21.3 86 0.20 0.04 < 0.01 0.03 0.23 6 1 < 1 7.60 2.28 3.54 0.28 19.5 87 0.21 0.03 < 0.01 0.02 0.24 5 _ 1 < 1 10.29 3.43 5.58 0.38 22.3 88 0.28 0.04 < 0.01 0.02 0.31 7 1 1 11.73 3.73 6.26 0.40 22.2 89 0.21 0.03 < 0.01 0.06 0.27 6 1.2 < 1 10.19 3.09 5.18 0.35 21.3 90 0.18 0.02 < 0.01 0.04 0.23 5 1.1 < 1 10.95 . 3.36 5.41 0.36 21.2 91 0.21 0.03 0.01 0.03 0.25 9 1.1 1 10.65 4.74 5.30 0.34 19.6 92 0.23 0.03 0.01 0.02 0.25 8 1.2 1 10.53 2.99 5.02 0.34 20.9 93 0.22 0.02 0.01 0.04 0.28 14 1.3 < 1 8.11 2.21 4.06 0.32 21.4 94 0.22 0.02 0.01 0.02 0.25 6 1.1 < 1 9.48 2.58 5.12 0.37 23.2 95 0.29 0.02 0.01 0.07 0.37 8 1.2 1 7.75 2.03 3.93 0.31 22.0 96 0.25 0.02 0.01 0.05 0.31 3 1.1 1 7.98 2.21 4.03 0.32 21.8 97 0.20 0.03 0.01 0.15 0.36 5 1.2 1 8.03 2.54 4.14 0.32 21.5 98 0.20 0.02 < 0.01 0.05 0.26 < 5 1.0 < 1 7.50 2.06 4.01 0.33 22.7 99 0.21 0.02 < 0.01 0.03 0.24 < 5 0.9 7.12 2.04 4.10 0.34 23.7 00 0.19 0.02 < 0.01 0.03 0.23 < 5 1.0 7.35 2.33 4.34 0.35 23.6 01 0.20 0.02 < 0.01 0.02 0.24 13 0.9 8.33 2.39 4.76 0.37 23.8 02 0.24 0.04 < 0.01 0.02 0.27 < 5 1.0 7.75 2.27 4.59 0.37 24.3 03 0.23 0.03 < 0.01 0.05 0.28 6 0.9 8.00 2.43 4.59 0.36 23.5 04 0.21 ' 0.03 < 0.01 0.03 0.24 10 0.7 7.59 2.35 4.36 0.35 23.3 05 0.24 0.02 < 0.01 0.06 0.30 9 1.3 7.66 2.22 4.24 0.34 23.1 06 0.10 _ 0.03 < 0.01 0.03 0.14 17 1.0 6.54 1.84 3.46 0.30 22.6 07 0.15 0.02 < 0.01 0.05 0.21 7 1.0 8.26 2.37 4.85 0.38 24.1 08 0.21 0.02 < 0.01 0.06 0.28 6 1.0 8.42 2.37 4.88 0.38 24.1 09 0.20 0.02 < 0.01 0.05 0.26 11 0.9 8.17 2.31 4.57 0.36 23.5 10 0.13 < 0.02 < 0.01 0.02 0.16 12 1.2 7.23 2.06 3.91 0.33 22.7 11 0.14 0.02 < 0.01 0.03 0.19 7 1.3 6.77 1.96 3.52 0.30 21.7 12 0.18 0.03 < 0.01 0.02 0.21 1.3 8.02 2.12 4.57 0.37 23.9 13 039 0.02 < 0.01 0.02 _ 0.20 0.9 8.26 2.16 4.38 0.35 23.1 14 0.13 0.03 < 0.01 0.03 0.15 1.0 8.78 2.37 5.05 0.39 24.4 15 0.15 0.02 < 0.01 0.04 0.19 9.15 2.46 5.18 0.39 24.1 16 0.17 < 0.02 < 0.01 0.04 0.21 7.98 2.08 4.44 0.36 23.8 17 0.15 0.02 < 0.01 0.04 " 0.18 7.13 1.88 3.64 0.31 22.3 - 18 0.15 0.02 < 0.01 0.04 0.19 Maximum 0.29 0.07 0.01 0.15 0.37 17 1.3 1 11.73 4.74 6.26 0.40 24.4 Minimum 0.10 0.02 < 0.01 0.02 0.14 3 0.7 < 1 6.54 1.84 3.46 0.28 19.5 Average 0.20 0.03 0.01 0.04 0.24 7 1.1 1 8.45 2.48 4.52 0.35 22.5 #Tests 37 37 36 36 37 30 33 17 34 34 34 34 34 Site: SW-06 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Stateline ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2018 Coliforms Fecal/ Fecal < Blue Green Algae > Single Hard- Total E.coli Strep < Colonies > < Filaments > <---Filamaments---> Cells D.O. SO4 ness Year MPN MPN MPN # cells # cells # urn #cells mg/L mg/L mg/L 81 1,843 1,191 488 50 403 42 312 , 2 63 6 82 83 4,216 1,060 843 0 0 20 310 0 0 0 9.67 0.69 26 84 4,137 1,724 306 53 9 14 8 783 312 13 8.81 1.85 32 85 879 754 83 0 0 7 1 27 2 0 9.34 2.09 36 86 2,082 522 318 0 0 2 98 139 5 4,178 9.54 9.08 30 87 1,009 639 251 0 0 46 577 115 4 1,339 9.37 6.64 35 88 666 288 176 0 0 0 0 369 13 554 10.78 6.01 89 669 465 286 0 0 0 0 392 167 11,149 10.69 5.34 90 1,074 178 318 0 0 0 0 0 0 222 8.43 5.71 46 91 774 181 65 0 0 0 0 0 0 0 8.75 5.60 41 92 516 101 60 0 0 0 0 0 0 0 9.26 5.60 30 93 " 2,450 1,088 60 0 0 0 0 0 0 0 9.93 4.49 27 94 3,094 315 540 0 0 0 0 0 0 0 9.43 5.65 34 95 580 59 50 0 0 0 0 0 0 0 9.65 4.84 25 96 799 205 55 0 0 0 0 0 0 0 8.80 3.19 28 97 323 88 230 0 0 0 0 0 0 0 9.65 3.16 29 98 333 63 130 0 0 13 72 0 0 0 8.65 2.60 25 99 1,799 109 130 0 0 0 0 0 0 0 9.28 2.74 00 1,503 119 60 0 0 0 0 0 0 0 9.33 3.05 01 681 137 130 0 0 0 0 0 0 0 9.47 2.68 02 509 135 58 0 0 0 0 0 0 0 8.85 2.66 03 275 72 68 0 0 0 0 0 0 0 8.58 2.69 04 794 81 42_ 0 0 0 0 0 0 0 8.76 2.74 05 167 53 26 0 0 0 0 0 0 0 9.14 2.63 06 832 87 29 0 0 0 0 0 0 0 9.58 1.67 07 485 210 43 0 0 0 0 0 0 0 8.70 2.62 08 267 142 230 0 0 0 0 0 0 , 0 9.13 3.33 09 446 61 26 0 0 0 0 0 0 0 9.30 2.68 10 1,305 181 77 0 0 0 0 0 0 0 8.86 2.30 11 2,718 1,676 77 0 0 0 0 0 0 0 9.66 1.54 12 737 107 12 0 0 0 0 0 0 0 8.49 2.21 13 2,391 193 14 0 0 0 0 0 0 0 8.97 2.29 14 1,633 206 13 0 0 0 0 0 0 0 9.23 2.84 15 1,867 61 10.59 3.01 16 1,278 63 11.34 2.61 17 437 52 10.57 1.62 18 1,449 104 10.52 2.19 Maximum 4,216 1,724 843 53 403 46 577 783 312 11,149 11.34 9.08 46 Minimum 167 52 12 0 0 0 0 0 0 0 8.43 0.69 25 Average 1,271 345 160 3 12 4 42 55 17 529 9.42 3.41 32 #Tests 37 37 33 33 33 33 33 33 33 33 36 36 14 ■ Site: SW-06 Nitrate-Nitrogen Total Phosphorus 0.5 - 0.5 0.4 0.4 0.3 _ 0.3 _ J J - E - E - 0.2 0.2 0.1 0.1 0.0 , 0.0 tb^ cb3 c �1 00 0 b 0 �,� o0 0 Ob o' O oo ^^ 1,3 ^h ^� tb^ h i° �1 � o on) ah a'‘ ao o^ O oh 0‘ 0 ^^ 0 0 ^‘ —+—Nitrate Linear(Nitrate) ---♦—Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 10 250 - 9 - - 8 = 200 7 1 6 = 150 A - a) 4 _ ' 100 - 3 - A _il 2 .� 50 - 1 = 0 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 93' � Oh � �' A^ 0,`5 oh o,'1 o,°' O^ otb O") ^^ 0 ^h ^1 ----Chlorides Linear(Chlorides) —r—TDS Linear(TDS) Site: SW-07 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredricksburg Ditch,Upper ALPINE COUNTY SURFACEWATER QUALITY DATA 2018 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L 03/06/18 Dry 04/03/18 Dry 05/10/18 Dry 06/07/18 15.5 7.55 62 2.8 1.9 106 128 1.84 0.131 0.04 07/10/18 Dry 08/07/18 Dry 09/05/18 Dry 10/03/18 Dry 11/06/18 Dry Maximum • 15.5 7.55 62.0 2.80 1.90 106 128 1.8 0.131 0.040 Minimum 15.5 7.55 62.0 2.80 1.90 106 128 1.8 0.131 0.040 Average 15.5 7.55 62.0 2.80 1.90 106 128 1.8 0.131 0.040 #Tests 1 1 1 1 1 1 1 1 1 1 0 0 Site: SW-07 SOUTH TAHOE PUBLIC UTILITY DISTRICT ,' Stream: Fredricksburg Ditch,Upper ALPINE COUNTY SURFACEWATER QUALITY DATA 2018 Coliforms Fecal < Blue Green Algae > Single Hard- Total E.coli Strep < Colonies > < Filaments > <---Filamaments---> Cells D.O. SO4 ness Date MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 03/06/18 04/03/18 05/10/18 06/07/18 2682 387.3 7.96 1.81 07/10/18 08/07/18 09/05/18 10/03/18 11/06/18 Maximum 2,682 387 0 0 0 0 0 0 0 7.96 1.81 Minimum 2,682 387 0 0 0 0 0 0 0 7.96 1.81 Average 2,682 387 7.96 1.81 #Tests 1 1 0 0 0 0 0 0 0 0 1 1 0 . Site: SW-07 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredricksburg Ditch,Upper ALPINE COUNTY SURFACEWATER QUALITY DATA From 1981 To: 2018 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L 81 13.1 7.50 69 1.60 1 175 250 0.05 0.03 3.20 82 11.8 7.54 73 6.78 26 139 182 24.5 0.13 0.09 4.90 83 18.0 7.63 68 2.35 5 128 165 10.2 0.07 0.05 4.44 84 15.0 7.63 59 4.30 11 95 155 9.7 0.11 0.05 3.33 85 16.0 7.51 60 2.60 5 113 174 11.6 0.09 0.03 3.70 86 12.5 7.79 70 5.07 4 125 171 8.4 0.09 0.02 4.10 87 16.3 7.61 86 5.75 19 176 267 20.8 0.20 < 0.01 6.75 88 13:1 7.31 70 4.32 8 158 232 19.9 0.07 0.02 5.32 89 17.6 7.39 72 12.08 26.0 166 257 27.9 0.21 0.03 5.22 90 9.6 7.46 68 3.13 6.0 158 292 34.5 .0.06 0.02 0.03 3.42 91 14.3 7.22 69 2.96 12.6 198 262 42.2 0.17 0.06 0.04 4.48 92 11.9 7.40 82 2.63 6.0 244 344 48.1 0.25 0.15 0.05 7.73 93 14.0 7.12 72 4.20 7.4 166 243 26.3 0.21 0.13 0.03 5.32 94 10.8 7.87 80 2.30 19.0 240 313 33.4 0.12 0.03 0.02 3.63 95 18.3 6.90 63 3.37 4.7 122 147 5.9 0.17 0.10 0.03 4.70 96 21.2 7.03 76 5.20 5.5 140 199 11.6 0.19 0.10 0.03 4.80 97 19.6 7.44 64 7.00 54.0 129 155 7.2 0.24 0.08 .0.04 3.70 98 17.0 7.04 60 3.40 6.4 114 144 5.9 0.13 0.07 0.03 3.55 99 20.0 7.15 87 2.50 3.8 159 208 7.6 0.12 0.08 0.03 4.51 00 15.7 7.11 64 24.23 40.5 143 193 14.3 0.46 0.21 0.07 6.83 01 . 16.6 7.21 72 7.48 5.2 146 223 18.1 0.24 0.22 0.04 5.30 02 14.9 7.43 82 5.52 4.0 148 212 14.9 0.14 0.05 0.04 4.60 03 14.5 7.54 67 7.69 11.7 143 194 14.4 0.23 0.13 0.05 4.33 04 14.0 7.41 48 12.75 26.0 133 183 13.6 0.08 0.06 0.03 5.03 05 14.7 6.87 65 7.28 8.7 149 184 17.4 0.31 0.22 0.05 4.62 06 16.3 7.18 68 4.45 5.3 115 131 5.9 0.15 0.05 0.04 3.04 07 15.3 7.53 77 4.92 8.6 149 212 16.1 0.14 0.07 0.04 4.80 08 7.9 7.51 50 43.00 71.3 114 140 7.3 0.40 0.14 0.02 8.66 09 14.1 7.68 89 20.73 32.5 167 229 15.6 0.16 0.02 0.03 5.82 10 11.8 7.38 75 82.48 75.3 147 211 14.9 0.37 0.03 0.03 5.54 11 12.4 7.52 62 49.62 85.3 114 148 6.8 0.44 0.06 0.03 5.81 12 20.6 7.11 70 9.50 13.7 153 257 16.5 0.27 0.14 0.04 5.56 13 14.6 7.12 74 7.50 5.9 148 197 12.4 0.22 _0.04 0.03 4.75 14 8.8 7.13 81 5.13 5.6 170 247 19.2 _ 0.13 0.04 0.04 6.13 15 13.7 7.24 106 2.80 3.1 170 274 23.5 0.09 0.05 0.05 3.93 16 Dry 17 14.5 7.19 65 2.50 2.5 120 153 5.4 0.13 0.05 5.26 18 15.5 7.55 62 2.80 1.9 106 128 1 1.8 0.13 0.04 Maximum 21.2 7.87 106 82.48 85.3 244 344 48.1 0.46 0.22 0.09 8.66 Minimum 7.9 6.87 48 1.60 1.0 95 128 1.8 0.05 0.02 < 0.01 3.04 Average 14.8 7.36 71 10.32 17.2 148 207 16.5 0.18 0.09 0.04 4.91 #Tests 37 _ 37 37 37 37 37 37 36 37 28 35 36 Site: SW-07 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredricksburg Ditch,Upper ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2018 Oil& TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Ca Mg Na SAR Na Year mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 81 0.39 0.05 0.61 7 1 < 1 82 0.80 0.03 1.03 28 1 < 1 83 0.69 0.09 < 0.01 0.09 0.80 23 2 < 1 84 0.44 0.09 0.01 0.24 0.69 12 1 < 1 15.33 3.20 8.93 0.52 24.2 85 0.59 0.10 0.01 0.04 0.64 17 1 < 1 14.47 3.48 10.73 0.62 26.9 86 0.51 0.07 0.01 0.16 0.68 17 1 < 1 15.67 3.89 9.33 0.57 - 25.4 87 1.32 0.20 < 0.01 0.22 1.55 36 5 < 1 24.00 5.85 17.50 0.85 28.2 88 0.78 0.08 0.01 0.12 0.91 15 2 1 22.50 6.03 12.50 0.60 23.6 89 0.94 0.08 '< 0.01 0.14 1.09 16 2.0 < 1 23.40 6.05 15.80 0.72 26.3 90 0.24 0.03 < 0.01 0.31 0.56 6 1.2 < 1 26.00 6.78 14.36 0.64 24.5 91 0.64 0.09 0.04 0.63 1.31 21 2.2 < 1 27.60 6.82 19.64 0.85 28.3 92 1.26 0.03 0.02 0.28 1.56 3 3.3 < 1 28.67 7.40 26.67 1.17 33.7 93 0.84 0.03 0.02 0.44 1.30 18 1.8 2 23.00 5.78 16.76 0.80 29.0 94 0.95 0.03 0.01- 0.44 1.39 . 10 4.0 < 1 23.00 5.67 13.10 0.64 26.5 95 1.00 0.04 0.01 0.06 1.06 2.0 1 16.67 4.00 7.80 0.44 20.9 96 1.01 0.04 0.02 0.27 1.29 2.0 1 18.00 4.20 12.50 0.69 28.3 97 1.16 0.05 0.01 0.07 1.24 34 4.5 1 16.00 4.15 10.25 0.59 26.5 98 0.73 0.03 0.01 0.13 0.87 1.7 < - 1 12.50 3.24 10.70 0.70 32.2 99 0.67 0.03 < 0.01 0.41 1.10 1.1 19.95 4.23 14.30 0.79 30.7 00 1.65 0.32 0.05 0.63 2.33 3.4 13.36 4.66 17.17 1.03 37.3 01 1.43 0.04 0.09 0.78 2.30 1.0 16.30 4.23 19.75 1.13 39.1 02 0.63 0.04 < 0.01 0.34 0.97 1.1 19.17 4.95 17.50 0.92 33.7 03 0.84 0.18 0.04 0.52 1.40 27 2.1 - 15.36 4.23 13.77 0.79 32.4 04 0.77 0.19 0.01 0.38 1.15 25 2.0 10.49 3.45 9.01 0.62 29.5 05 1.11 0.44 0.07 0.50 1.68 34 2.6 13.55 3.74 15.52 0.94 34.7 06 0.75 0.13 0.01 0.14 ' 0.90 1.5 15.05 3.50 9.01 0.54 26.1 07 0.55 0.25 0.03 0.93 1.51 24 1.7 16.48 4.72 19.37 1.08 37.5 08 1.32 0.08 0.01 0.10 1.43 8.9 11.70 4.18 10.70 0.68 28.8 09 0.83 0.03 < 0.01 0.23 1.07 2.6 19.47 5.90 17.73 0.90 32.3 10 0.72 0.03 < 0.01 0.63 1.36 - 1.9 16.90 6.13 14.69 0.78 29.4 11 1.23 -0.07 0.02 0.17 1.42 21 2.7 12.63 4.71 10.73 0.66 29.1 12 3.25 2.10 0.02 1.07 4.34 5.0 16.87 4.87 19.77 1.10 38.4 13 1.05 0.05 0.02 0.47 1.52 2.9 16.70 4.29 15.28 0.86 33.4 14 0.60 0.05 < 0.01 0.97 1.57 1.7 19.07 5.18 20.87 1.09 36.9 15 0.40 0.02 < 0.02 1.28 1.68 20.85 5.46 23.75 1.20 39.4 16 17 0.65 0.03 < 0.01 0.07 0.7214.97 3.66 9.34 0.55 24.9 18 0.53 < 0.01 0.03 0.56 Maximum 3.25 2.10 0.09 1.28 4.34 36 8.9 2 28.67 7.40 26.67 1.20 39.4 Minimum 0.24 0.02 < 0.01 0.03 0.56 3 1.0 < 1 10.49 3.20 7.80 0.44 20.9 Average 0.90 0.15 0.02 0.38 1.29 20 2.4 1 18.05 4.81 14.69 0.79 30.2 #Tests 37 36 35 35 - 37 20 34 18 33 33 33 33 33 Site: SW-07 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredricksburg Ditch,Upper ALPINE COUNTY SURFACEWATER QUALITY DATA ' From: 1981 To: 2018 Coliforms Fecal/ Fecal < Blue Green Algae > Single Hard- Total E.coli Strep < Colonies > < Filaments > <---Filamaments---> Cells D.O. SO4 ness Year MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 81 1,120 763 216 56 193 13 90 3 46 10 82 5,380 1,608 3,306 126 930 104 1,122 4 84 92 83 6,700 5,965 2,515 5 10 65 780 35 920 20 7.75 2.16 61 84 1,500 958 1,355 2 1 5 2 142 7 72 8.63 12.43 53 85 9,110 1,343 843 0 0 0 0 277 2 0 7.70 3.31 50 86 17,533 3,133 710 0 0 0 0 0 0 369 7.63 < 10.00 60 87 > 24,000 17,500 5,545 0 0 0 0 0 0 277 7.05 13.43 86 88 7,966 3,872 998 0 0 0 0 0 0 277 10.81 13.23 89 10,688 9,065 8,498 0 0 0 0 _ 0 0 1,708 8.93 15.53 90 1,646 510 183 0 0 0 0 0 0 0 8.80 17.88 78 91 12,366 7,696 430 0 0 21 648 0 0 0 7.47 18.75 48 92 11,810 9,677 90 0 0 0 0 0 0 0 7.90 25.01 122 93 13,640 6,136 230 0 0 0 0 0 0 0 7.64 13.46 64 94 4,053 630 260 0 0 0 0 0 0 0 10.90 17.63 99 95 12,167 9,677 0 0 0 0 0 0 0 6.72 6.97 96 24,000 17,500 0 0 0 0 0 0 0 7.95 8.27 97 17,500 5,515 4,600 0 0 0 0 0 0 0 8.08 7.31 53 98 4,600 2,400 0 0 0 0 0 0 0 9.00 4.00 99 7,800 3,050 0 0 0 0 0 0 0 5.35 5.96 00 11,067 10,333 0 0 0 0 0 0 - 0 7.40 8.25 01 5,620 5,620 0 0 0 0 0 0 0 8.85 7.14 02 1,187 540 0 0 0 0 0 0 0 8.69 7.04 03 4,875 2,783 240 0 0 9 528 0 0 0 7.33 5.08 04 7,800 5,620 240 0 0 0 0 0 0 0 7.58 7.13 05 2,538 2,040 230 0 0 0 0 0 0 0 7.90 5.42 06 965 680 0 0 0 0 0 0 0 8.57 2.12 07 3,578 790 93 0 0 0 0 0 0 0 7.94 6.32 08 2,400 2,400 0 0 0 0 0 0 0 7.08 4.93 09 7,643 3,820 0 0 0 0 0 0 0 9.86 7.30 10 4,325 3,958 0 0 7 83 0 0 0 7.68 6.87 11 5,666 5,524 43 0 0 0 0 0 0 0 8.45 2.32 12 11,000 7,643 0 0 9 297 0 0 0 7.43 24.37 13 4,733 3,690 90 0 0 0 0 0 0 0 7.90 8.43 14 7,477 4,443 0 0 0 0 0 0 0 7.23 9.46 15 2,755 3177.81 10.55 16 17 8,041 304 9.08 1.98 18 2,682 387 7.96 1.81 Maximum > 24,000 17,500 8,498 126 930 104 1,122 277 920 1,708 10.90 25.01 122 Minimum 965 304 43 0 0 0 0 0 0 0 5.35 1.81 48 Average 7,782 4,538 1,463 6 33 7 104 14 31 83 8.09 9.20 70 #Tests 37 37 21 34 34 34 34 34 34 34 35 35 - 11 ,, Site: SW-07 Nitrate-Nitrogen Total Phosphorus 1.5 = 1.0 -_ 1.4 _ 0.9 1.3 1.2 = 0.8 = 1.1 - 0.7 = 1.0 - , 0.9 -r 0.6 as 0.8 A 0.5 = - E 0.7 -= E 0.6 _ , 1_ 0.4 0.4 -_ A aALVIVIIIII. 0.3 -_ 0.2 ` •AS----""v 111M lanai — a y Iv-; ', M' V / 111 0.11 - ' VA 0.0 - 0.0 . . , , „ , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , 0^ ,bn, g, �, 00 0` c? 4) ,i‘ 0' 0” Ob OD 6 Ob N'` N" i.3 �� 0P\ 9? .h 0i 4' 0' gb 00 0'1 oq ON p" p' p'\ poi N.'` ,.''' ,'' K\ —s--Nitrate Linear(Nitrate) —+--Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 100 - 500 90 1 - 80 = 400 70 = 60 1 300 J - � - ( A� 50 _1 � 40 1 200 30 ; •,,,,,,aysyLvit:ge:: 20 - 100 i 'IF `.ow AlliiiiimankivAl.:-..,!—Ak 0'` 03 00 0i 00 0^ 0" GP 4' 00b 0'` Or ph 0'l poi N^ N'D ^h ,:'1 0^ 0g 04' 0, 00 0^ 0' 04' 41 00 0" 03 Oh 0'l 00 ,:` i(b Nh P'1 —♦—Chlorides Linear(Chlorides) —4—TDS Linear(TDS) Site: SW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Irrigation Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 2018 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L 03/06/18 Dry 04/03/18 12.5 7.29 47.9 0.9 1.62 134 132 3.22 0.066 0.015 05/10/18 Dry 06/07/18 Dry 07/10/18 Dry 08/07/18 Dry 09/05/18 Dry 10/03/18 Dry - 11/06/18 Dry Maximum 12.5 7.29 47.9 0.9 1.6 134 132 3.22 0.066 0.015 Minimum 12.5 7.29 47.9 0.9 1.6 134 132 3.22 0.066 0.015 Average 12.5 7.29 47.9 0.9 1.6 134 132 3.22 0.066 0.015 #Tests 1 1 1 1 1 1 1 1 1 1 0 0 Site: SW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Irrigation Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 2018 Coliforms Fecal < Blue Green Algae > Single Hard- Total E. coli Strep < Colonies > < Filaments > <---Filamaments---> Cells D.O. SO4 ness Date MPN MPN MPN # cells # cells # urn #cells mg/L mg/L mg/L 03/06/18 04/03/18 261.3 2 8.08 8.52 05/10/18 06/07/18 07/10/18 08/07/18 09/05/18 10/03/18 - 11/06/18 Maximum 261 2 0 0 0 0 0 0 0 8.08 8.52 Minimum 261 < 2 0 0 0 0 0 0 0 8.08 8.52 Average 261 2 8.08 8.52 #Tests 1 1 0 0 0 0 0 0 0 0 1 1 0 Site: SW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Irrigation Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA From 1981 To: 2018 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L 81 13.2 7.72 61 2.24 17 116 134 0.04 0.02 2.51 82 15.3 7.53 57 2.40 8 98 119 0.04 0.04 2.16 83 13.8 7.72 56 3.62 12 96 117 1.4 0.11 0.04 2.33 84 14.2 7.56 57 4.59 18 88 114 1.1 0.12 0.05 2.51 85 14.2 7.63 57 3.53 21 85 116 1.9 0.12 0.15 2.63 86 12.4 7.63 55 3.52 18 89 111 1.3 0.13 0.02 2.50 87 13.4 7.28 57 2.48 13 93 119 1.8 0.10 0.02 2.28 88 12.7 7.63 55 3.03 19 95 117 1.3 0.07 0.01 1.98 89 13.7 7.49 53 . 2.79 12.9 94 118 1.5 0.08 0.02 2.17 90 14.1 7.56 54 4.01 23.5 102 111 1.2 ' 0.09 0.03 0.03 2.18 91 15.0 7.28 57 2.19 8.3 98 122 1.3 0.05 0.02 0.02 2.21 92 14.5 7.53 54 2.44 12.7 96 122 1.3 0.07 0.02 0.02 2.19 __, 93 13.2 7.59 55 2.78 13.7 99 124 1.6 0.07 0.02 0.02 2.36 94 13.3 7.40 49 2.87 11.3 96 127 ` 1.6 0.08 0.02 0.02 2.40 95 13.7 7.42 60 1.80 9.1 104 129 1.7 0.07 0.02 0.02 2.08 96 14.5 7.62 55 4.89 22.7 96 118 1.5 0.10 0.03 0.02 2.14 97 13.6 7.66 52 4.25 20.4 97 109 1.8 0.10 0.04 0.02 2.63 98 13.7 7.23 52 3.42 27.2 91 109 1.8 0.09 0.02 0.01 2.38 99 15.6 7.31 49 3.08 17.8 90 111 1.6 0.07 0.02 0.01 2.30 00 13.9 7.13 49 3.37 33.6 91 109 1.6 0.09 0.02 0.02 2.16 01 15.8 7.45 55 5.24 15.4 98 122 1.9 0.16 0.03 0.02 2.42 02 16.0 7.32 60 3.70 20.2 100 127 1.6 0.06 0.02 0.02 2.24 03 13.1 7.46 57 6.40 19.0 97 114 1.6 0.06 0.02 0.02 2.30 04 17.2 7.52 58 15.68 40.1 98 122 1.8 0.13 0.02 - 0.03 2.70 05 14.1 7.13 54 4.31 10.1 101 105 1.5 0.05 0.03 0.02 2.05 06 16.7 6.97 58 2.55 4.7 103 112 1.5 0.09 0.03 0.02 2.21 07 13.8 7.43 57 6.78 18.0 102 125 1.7 0.07 0.02 0.02 3.05 08 16.2 7.56 55 11.24 28.3 100 113 1.8 0.10 0.02 0.01 2.60 09 14.3 7.39 53 13.06 45.5 100 115 1.5 0.10' 0.02 0.01 2.53 10 12.7 7.15 46 4.98 14.1 94 104 1.6 0.07 0.02 0.01 2.62 11 15.4 7.45 52 7.60 14.7 101 108 1.5 0.09 0.02 0.01 2.94 12 16.2 6.93 60 7.77 16.1 101 125 1.5 0.07 0.01 0.02 2.43 13 14.6 7.11 64 5.43 18.7 114 133 1.7 0.09 0.02 0.02 3.06 14 11.4 7.03 58 9.56 29.4 109 131 1.9 0.23 0.02 0.02 3.75 15 13.6 6.84 57 26.90 92.3 126 143 2.4 0.47 0.03 0.01 3.71 16 13.4 6.58 68 2.26 7.4 136 146 1.6 0.12 0.05 3.58 ✓ 17 15.3 6.76 71 5.46 22.7 147 165 2.4 0.14 0.04 3.30 18 12.5 7.29 48 0.90 1.6 134 132 3.2 0.07 0.02 Maximum 17.2 7.72 71 26.90 92.3 147 165 3.2 0.47 0.05 0.15 3.75 Minimum 11.4 6.58 46 0.90 1.6 85 104 1.1 0.04 0.01 0.01 1.98 Average 14.2 7.35 56 5.35 19.9 102 121 1.7 0.10 0.02 0.02 2.53 #Tests 38 38 38 38 38 -38 38 36 38 29 35 37 Site: SW-08 - SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Irrigation Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2018 Oil& TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Ca Mg Na SAR Na Year mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L % 81 0.37 0.03 0.50 13 1 < 1 82 0.47 0.02 0.70 17 1 < 1 83 0.38 0.06 0.01 0.10 0.49 13 1 < 1 84 0.39 0.07 < 0.01 0.15 0.55 10 1 < 1 10.55 2.66 8.28 0.59 30.6 85 0.38 0.06 < 0.01 0.11 0.49 13 1 < 1 11.03 2.64 8.51 0.60 30.6 86 0.38 0.05 < 0.01 0.19 0.57 14 1 2 10.49 3.05 6.59 0.46 25.4 87 0.32 0.03 < 0.01 0.14 0.48 10 1 < 1 11.23 2.71 8.28 0.66 29.9 88 0.40 0.04 < 0.01 0.16 0.58 8 1 < 1 11.55 2.81 8.77 0.60 30.7 89 0.45 0.06 < 0.01 0.12 0.58 12 1.5 < 1 10.73 2.58 8.02 0.56 30.0 90 0.44 0.03 < 0.01 0.16 0.61 16 1.4 < 1 11.53 2.66 8.88 0.60 31.1 91 0.36 0.04 0.01 0.16 0.54 18 1.1 1 11.70 2.82 7.68 0.52 27.6 92 0.46 0.03 0.01 0.13 0.60 14 1.3 < 1 11.46 2.58 8.45 0.58 30.2 93 0.42 0.03 0.01 0.32 0.75 14 1.2 < 1 12.12 2.83 8.80 0.59 29.5 94 0.50 0.03 0.01 0.35 - 0.86 6 1.3 < 1 13.42 3.13 9.35 0.59 29.7 95 0.48 0.02 0.01 0.34 0.84 7 1.5 1 12.40 2.77 9.72 0.65 31.9 96 0.44 0.03 0.01 0.33 0.78 5 1.4 1 10.98 2.59 8.99 0.63 32.3 97 0.40 0.03 0.01 0.40 0.81 12 1.8 1 11.18 2.73 8.50 0.58 30.3 98 0.42 0.02 < 0.01 0.26 0.69 6 1.1 < 1 10.28 2.46 8.62 0.62 32.3 99 0.44 0.02 < 0.01 0.27 0.72 9 1.0 9.79 2.48 8.99 0.66 33.5 00 0.46 0.03 < 0.01 0.20 0.66 17 1.1 9.06 2.57 8.12 0.61 32.4 01 0.40 0.03 < 0.01 0.16 0.56 14 0.7 10.38 2.81 9.42 0.68 33.8 02 0.39 0.05 < 0.01 0.12 0.52 10 0.9 11.66 2.73 9.96 0.68 33.5 03 0.47 0.03 < 0.02 0.13 0.62 15 0.8 12.29 3.09 10.71 0.70 33.6 04 0.79 0.04 < 0.01 0.17 0.97 19 1.9 11.05 2.87 8.96 / 0.62 31.2 05 0.45 0.03 < 0.01 0.09 0.55 9 1.3 10.59 2.59 9.18 0.65 33.3 06 0.36 0.04 < 0.01 0.03 0.40 12 1.6 11.36 2.60 9.80 0.69 33.9 07 0.46 0.03 < 0.01 0.06 0.53 22 1.2 11.57 2.79 10.01 0.69 33.0 08 0.70 0.02 < 0.01 0.02 0.72 22 1.7 10.91 2.72 9.50 0.66 32.7 09 0.90 0.03 < 0.01 0.05 0.96 28 1.5 10.73 2.67 9.75 0.69 33.8 10 0.61 0.04 < 0.01 0.04 0.66 35 1.6 9.29 2.43 8.59 0.64 32.8 11 = 0.68 0.02 0.01 0.03 0.72 19 2.0 9.72 2.65 8.94 0.66 32.2 12 0.56 0.03 < 0.01 0.03 0.59 1.5 11.41 2.75 9.94 0.69 33.6 13 0.59 0.03 < 0.01 0.01 0.59 1.2 12.75 2.94 10.78 0.72 33.8 14 0.90 0.04 0.02 0.01 0.91 2.2 11.93 2.87 10.50 0.73 34.0 15 1.38 0.08 < 0.01 0.02 1.39 12.74 3.14 12.00 0.82 36.1 16 0.87 0.02 < 0.01 0.02 0.88 13.62 3.25 12.45 0.81 35.3 17 1.23 0.03 < 0.01 0.02 1.24 14.74 3.53 14.18 0.90 37.5 18 1.45 < 0.02 < 0.01 < 0.01 1.45 Maximum 1.45 0.08 0.02 0.40 1.45 35 2.2 2 14.74 3.53 14.18 0.90 37.5 Minimum ' 0.32 0.02 < 0.01 0.01 0.40 5 0.7 < 1 9.06 2.43 6.59 0.46 25.4 Average 0.57 0.03 0.01 0.14 0.71 14 1.3 1 11.36 2.78 9.39 0.65 32.1 #Tests 38 38 36 36 38 31 34 18 34 34 34 34 34 Site: SW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Irrigation Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2018 Coliforms Fecal/ Fecal < Blue Green Algae > Single Hard- Total E.coli Strep < Colonies > < Filaments > <---Filamaments---> Cells D.O. SO4 ness Year MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 81 2,064 752 392 18 _ 75 61 424 4 160 15 82 6,870 1,963 381 36 95 67 438 8 205 45 83 1,785 672 132 10 20 37 385 30 1,852 20 8.02 2.50 46 84 3,100 893 409 74 2 5 21 517 718 7 7.70 1.52 40 85 2,463 471 207 0 0 0 0 185 5 0 7.53 1.01 40 86 1,830 407 546 0 0 0 0 115 3 646 7.64 9.25 38 87 . 891 669 213 0 0 23 508 69 3 4,778 7.90 6.12 40 88 3,368 496 300 0 0 0 0 25 0 201 8.94 5.01 89 5,282 2,973 4,245 0 0 _ 0 0 69 3 324 7.42 5.79 90 3,842 1,739 4,354 0 0 0 0 0 0 0 6.90 6.53 41 91 3,651 203 130 0 0 0 0 0 0 0 7.16 6.70 41 92 6,618 844 220 0 0 0 0 0 0 0 7.62 7.07 44 93 2,638 114 80 0 0 0 0 0 0 0 8.10 6.95 37 94 2,548 309 580 0 0 6 8 0 0 0 7.49 7.01 39 95 2,694 651 1,315 0 0 0 0 0 0 0 8.03 6.13 43 96 3,420 2,091 994 0 0 0 0 0 0 0 7.55 2.86 7 97 3,222 1,518 330 0. 0 0 0 0 0 0 8.03 3.86 38 98 2,963 1,336 390 0 0 0 0 0 0 0 8.08 3.87 - 40 99 4,543 2,312 160 0 0 0 0 0 0 0 7.49 4.41 00 5,586 2,661 160 0 0 0 0 0 0 0 8.69 4.55 01 5,100 3,388 580 0 0 0 0 0 0 0 7.53 4.87 02 3,269 1,263 152 0 0 8 59 0 0 0 6.44 4.48 03 2,217 577 235 0 0 0 0 0 0 0 7.32 4.29 04 2,809 374 92 0 0 4 70 0 0 0 6.35 5.06 05 4,024 1,152 230 0 0 0 0 0 0 0 6.63 4.94 06 1,469 595 43 0 0 0 0 0 0 0 6.37 3.26 07 1,632 161 227 0 0 0 0 0 0 0 6.84 5.59 08 3,643 3,020 255 0 0 0 0 0 0 0 6.32 4.62 09 5,688 3,828 772 0 0 0 0 0 0 0 6.33 5.64 10 5,976 5,544 1,500 0 0 0 0 0 0 0 6.55 5.39 11 6,224 2,917 93 0 0 0 0 0 0 0 6.32 3.42 12 2,255 592 54 0 0 0 0 0 0 0 5.88 3.33 13 3,154 1,910 20 0 0 0 0 0 0 0 5.33 3.96 14 4,463 3,090 277 0 0 0 0 0 0 0 6.28 5.03 15 5,301 407 5.53 8.48 16 31,343 9,684 6.86 3.68 17 8,197 286 6.76 4.48 18 261 ,, 2 8.08 8.52 Maximum 31,343 9,684 4,354 74 95 67 508 517 1,852 4,778 8.94 9.25 46 Minimum 261 2 20 0 0 0 0 0 0 0 5.33 1.01 7 Average 4,379 1,628 590 4 6 6 56 30 87 178 7.17 5.00 38 #Tests 38 38 34 34 34 34 34 34 34 34 36 36 14 Site: SW-08 Nitrate-Nitrogen Total Phosphorus 0.5 ( 0.5 - 0.4 i 0.4 0.3 0.3 - JJ O) 0 - E - E - 0.2 0.2 - 4 -- 1 i 0.1 i 0.1 1 _ _ — 111, W Irmy 0.0 , . , , , , 0.0 - ,,^ car, rgy 0s\ OO O^ 0`5 OP li' CP O^ o"' OD 6 ,co ^^ 0 ,:., ,:\ rb^ cbib Oy ti‘ 4°' O^ On' O0 O‘ OO O^ CP Oh 6 0°' ^^ 0 0 ^1 —s--Nitrate Linear(Nitrate) --4--Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved-Solids 10 = 250 9 - 8 200 7 = 6 = 150 o) 5 _ en E = E 4 i 100 3 2 = 50 1 - i 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 O`` Orb Ob 4i OO O^ 0,`5 ooh o, 0,°' O^ Orb CP O.' O°' ^^ 0 0 ^\ —s—Chlorides Linear(Chlorides) --•—TDS Linear(TDS) IRRIGATION DITCHES Site: SW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Bruns Diversion ALPINE COUNTY SURFACEWATER QUALITY DATA 25"above Fredericksburg Ditch 2018 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L 06/07/18 Dry 07/10/18 25.4 8.33 248 492 56 2.67 2.77 08/07/18 22.5 8.39 261 507 58.1 3.06 0.487 09/05/18 - 17.3 8.26 272 546 64 3.24 2.95 10/03/18 13.1 7.86 305 650 64.5 4.06 3.34 Maximum 25.4 8.39 305 650 64.5 4.06 3.34 Minimum 13.1 7.86 248 492 56.0 2.67 0.49 Average 19.6 8.21 272 549 60.7 3.26 2.39 #Tests 4 4 0 0 0 4 4 4 4 4 0 0 Site: SW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Bruns Diversion ALPINE COUNTY SURFACEWATER QUALITY DATA 25"above Fredericksburg Ditch 2018 Coliforms Fecal < Blue Green Algae > Single Hard- Total E.coli Strep < Colonies > < Filaments > <---Filamaments---> Cells D.O. SO4 ness Date MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 06/07/18 07/10/18 6.93 13 08/07/18 7.18 13 09/05/18 7.47 13 10/03/18 8.44 16.6 Maximum 8.44 16.6 Minimum 6.93 13.0 Average 7.51 13.9 #Tests 0 0 0 0 0 0 _ 0 0 0 0 4 4 0 Site: SW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Bruns Diversion ALPINE COUNTY SURFACEWATER QUALITY DATA 25"above From 1981 Fredericksburg Ditch To: 2018 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L ' mg/L mg/L 01 18.6 8.23 243 489 62.2 2.69 2.56 03 17.5 8.01 296 436 57.2 2.48 2.26 03 17.0 7.93 241 465 58.2 2.56 2.35 04 17.7 8.16 243 490 61.8 3.13 2.95 05 16.1 7.83 217 361 39.1 2.37 2.32 06 17.5 8.24 229 438 47.4 2.57 2.40 07 18.2 8.26 270 503 56.0 3.19 2.90 08 17.4 8.25 254 470 54.7 3.31 2.99 09 20.2 8.38 259 503 53.6 3.40 3.20 10 17.5 8.25 257 483 53.6 3.14 2.95 11 18.2 8.35 205 388 43.7 1.99 1.90 12 20.6 8.45 256 468 52.6 2.98 2.73 13 18.0 8.02 252 448 50.6 2.65 2.54 14 17.3 8.16 286 524 44.6 3.31 2.28 15 17.0 7.97 278 489 53.8 3.27 3.11 16 14.8 .7.50 33.3 200 382 33.5 2.28 1.67 17 17.4 7.97 173 324 35.5 1.54 1.38 18 19.6 8.21 272 549 60.7 3.26 2.39 Maximum _20.6 8.45 33.3 296 549 62.2 3.40 3.20 Minimum 14.8 7.50 33.3 173 324 33.5 1.54 1.38 Average 17.8 8.12 33.3 246 456 51.0 2.78 2.49 #Tests 18 18 0 0 1 18 18 18 18 18 0 0 Site: SW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Bruns Diversion ALPINE COUNTY SURFACEWATER QUALITY DATA 25"above From: 1981 Fredericksburg Ditch To: 2018 - Oil& TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Ca Mg Na SAR Na Year mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L % 01 15.37 13.97 0.59 1.44 17.39 03 11.48 9.00 1.97 2.78 16.23 03 13.92 11.50 0.71 2.77 17.40 04 14.48 13.51 0.68 2.89 18.04 05 10.14 9.17 0.55 1.78 12.47 06 14.26 13.12 0.53 1.69 16.52 07 16.92 14.24 0.63 1.22 18.77 08 12.68 10.19 0.88 2.58 16.13 09 13.13 12.17 1.15 2.24 9.91 10 12.00 9.95 1.15 - 2.93 16.07 11 - 8.30 6.11 1.46 3.34 13.11 12 11.91 9.27 1.82 4.21 17.94 13 11.85 -9.59 0.86 4.01 16.72 14 15.63 11.92 0.55 3.74 19.93 15 10.64 8.48 1.79 6.10 18.53 16 9.29 7.43 0.68 2.02 11.99 17 10.85 5.42 0.98 2.90 14.72 18 19.15 16.75 0.70 1.38 21.23 Maximum 19.15 16.75 1.97 6.10 21.23 Minimum 8.30 5.42 0.53 1.22 9.91 Average 12.89 10.65 0.98 2.78 16.28 #Tests 18 18 18 18 18 0 0 0 0 0 0 0 0 i Site: SW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Bruns Diversion ALPINE COUNTY SURFACEWATER QUALITY DATA 25"above From: 1981 Fredericksburg Ditch To: 2018 Coliforms Fecal/ Fecal < Blue Green Algae > Single Hard- Total E.coli Strep < Colonies > < Filaments > <---Filamaments---> Cells D.O. SO4 ness Year MPN MPN MPN # cells # cells # urn #cells mg/L mg/L mg/L 01 7.95 18.72 03 6.44 16.96 03 6.82 18.70 04 8.27 16.85 05 6.96 13.11 06 7.53 13.26 07 6.94 15.22 08 7.31 15.28 09 7.70 15.80 10 6.35 15.55 11 _ 7.58 12.47 12 6.32 15.17 13 6.53 15.50 . ' 14 7.17 12.29 15 7.85 18.10 16 9.23 9.59 17 7.78 8.92 18 7.51 13.90 Maximum 0 0 0 0 0 0 0 9.23 18.72 Minimum 0 0 0 0 0 0 0 6.32 8.92 Average 7.35 14.74 #Tests 0 0 0 0 0 0 0 0 0 0 18 18 0 , _____ ■ Site: SW-1 2 Nitrate-Nitrogen Total Phosphorus 10.0 - 10.0 9.0 9.0 = 8.0 8.0 7.0 7.0 6.0 - 6.0 1 as 5.0 A 'a 5.0 = EE 4.0 - 4.0 3.0 3.0 ,..uIAlk 2.0 : iTTT . .0 1.0 - .0.0 01 03 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 01 03 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 —4--Nitrate Linear(Nitrate) —s—Total Phosphorus Linear(Total Phosphorus) r Chlorides Total Dissolved Solids 100 _ _ _ 500 - 90 = 80 = - 400 70 60 -AIL 300 • E W -1r 40 1 E -,,,,Iiiiiw,,. V 200 30 20 = 100 1 10 = • 01 03 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 01 03 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 —•--Chlorides Linear(Chlorides) —+--TDS Linear(TDS) Site: SW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredericksburg Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 100'below confluence with reclaimed water 2018 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L 6/7/2018 10.7 6.75 49 57.3 0.792 0.044 0.012 7/10/2018 22.2 8.2 87 161 11.0 0.595 0.504 8/7/2018 17.4 8.38 89 148 9.94 0.647 2.73 9/5/2018 17.2 8.23 271 525 61 3.31 2.84 10/3/2018 11.9 7.77 83 105 5.99 0.107 0.026 Maximum 22.2 8.38 271 525 61.000 3.310 2.840 Minimum 10.7 6.75 49 57.3 0.792 0.044 0.012 Average 15.9 7.87 116 199 17.744 0.941 1.222 #Tests 5 5 0 0 0 5 5 5 5 5 0 0 Site: SW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredericksburg Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 100'below confluence with reclaimed water 2018 Coliforms Fecal < Blue Green Algae > Single Hard- Total E.coli Strep < Colonies > < Filaments > <---Filamaments---> Cells D.O. SO4 ness Date MPN MPN MPN # cells # cells # um #-cells mg/L mg/L mg/L 6/7/2018 9.46 1.25 7/10/2018 7.65 3.5 8/7/2018 8.3 3.67 9/5/2018 7.52 12 10/3/2018 9.41 2.07 Maximum 9.46 12.00 Minimum 7.52 1.25 Average 8.47 4.50 #Tests 0 0 r 0 0 0 0 0 0 0 0 5 5 0 Site: SW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredericksburg Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 100'below confluence From 1981 - with reclaimed water To: 2018 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L 01 16.3 7.72 106 179 16.3 0.63 0.61 02 13.2 7.72 101 153 14.4 0.73 0.53 03 12.7 7.80 97 155 13.8 0.60 0.53 04 12.6 7.65 108 178 17.1 0.89 0.77 05 11.8 7.61 85 115 10.1 0.48 0.47 06 12.5 7.72 106 171 15.6 0.79 0.72 07 13.5 7.71 98 152 11.6 0.57 0.51 08 13.4 7.86 144 252 25.4 1.50 1.37 09 13.6 7.68 103 174 14.7 0.94 0.85 10 10.3 7.37 77 105 7.3 0.31 0.28 11 13.0 8.28 114 182 15.8 0.76 0.71 12 12.7 7.16 73 91 4.5 0.20 0.17 13 15.8 7.56 86 133 8.6 0.44 0.42 14 16.1 7.89 105 185 13.7 0.71 0.67 15 14.0 7.39 78 117 5.8 0.28 0.25 16 12.5 7.40 0.8 116 190 17.0 1.02 0.83 17 12.3 7.62 66 90 5.6 0.21 0.17 18 15.9 7.87 116 199 17.7 0.94 1.22 Maximum 16.3 8.28 0.8 144 252 25.4 1.50 1.37 Minimum 10.3 7.16 0.8 66 90 4.5 0.20 0.17 Average 13.5 7.67 0.8 99 157 13.1 0.67 0.61 #Tests 18 18 0 0 1 18 18 18 18 18 0 0 Site: SW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredericksburg Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 100'below confluence From: 1981 with reclaimed water To: 2018 Oil& TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Ca Mg Na SAR Na Year mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L % 01 3.79 4.40 0.16 0.40 4.35 02 1.99 1.97 0.20 0.74 2.93 03 3.21 2.73 0.16 0.48 3.85 04 3.68 3.56 0.18 0.77 4.63 05 1.88 1.53 0.14 0.36 2.38 06 5.08 4.39 0.14 0.50 5.72 07 2.91 2.33 0.11 0.20 3.21 08 5.76 4.53 0.46 1.33 7.55 09 3.10 2.70 . 0.30 0.62 4.02 10 0.87 0.64 0.09 0.61 1.57 11 2.89 1.97 0.61 1.24 4.74 12 0.61 0.23 0.10 0.59 1.30 13 1.75 1.23 0.14 0.48 2.36 14 2.43 2.45 0.16 1.11 3.68 15 0.85 0.51 0.12 0.61 1.57 16 3.30 2.61 0.31 1.06 4.66 17 0.78 0.46 0.14 0.44 1.36 18 1.71 4.87 0.22 0.38 1.87 Maximum 5.76 4.87 0.61 1.33 7.55 Minimum 0.61 0.23 0.09 0.20 1.30 Average 2.59 2.40 0.21 0.66 3.43 #Tests 18 18 18 18 18 0 0 0 0 0 0 0 0 Site: SW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredericksburg Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 100'below confluence From: 1981 with reclaimed water To: 2018 Coliforms Fecal/ Fecal < Blue Green Algae > Single Hard- Total E.coli Strep < Colonies > < Filaments > <---Filamaments---> Cells D.O. SO4 ness Year MPN MPN MPN # cells # cells # urn #cells mg/L mg/L mg/L 01 8.56 6.10 02 8.50 5.69 03 7.93 5.42 04 7.81 5.66 058.36 4.03 06 8.07 5.40 07 8.10 4.44 08 8.20 8.04 09 8.62 5.09 10 7.45 3.31 11 8.88 5.37 12 8.33 2.68 13 6.94 4.03 14 7.87 5.26 15 8.93 3.64 16 9.27 5.72 17 .9.01 2.04 18 8.47 4.50 Maximum 0 0 0 0 0 0 0 9.27 8.04 Minimum 0 0 0 0 0 0 0 6.94 2.04 Average 8.29 4.80 #Tests 0 0 0 0 0 0 0 0 0 0 18 18 0 Site: SW-13 Nitrate-Nitrogen Total Phosphorus 5.0 - - _ 5.0 • 4.0 4.0 3.0 3.0 E - E 2.0 2.0 1.0 1.0 `411111, Nirr 0.0 r 0.0 r r 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 01 02 03 04 05 06 07 08 09 10 11 12 13 14 -15 16 17 18 —•--Nitrate Linear(Nitrate) --•—Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 50 500 40 400 _ 30 - -- 300 C) C) E - E 20 - 200 10 V► 1pr . 100 • 4fr/N6 . 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 --♦—Chlorides Linear(Chlorides) -+—TDS Linear(TDS) Site: SW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Celio Tailwater ALPINE COUNTY SURFACEWATER QUALITY DATA @ Brooke Diversion 2018 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L 06/07/18 14.5 7.81 163 226 8.39 0.37 0.29 07/10/18 23.8 8.27 244 484 54.8 2.71 2.61 08/07/18 20.1 8.12 280 503 58.7 2.82 0.042 09/05/18 15.9 7.7 335 387 69 2.37 2.14 10/03/18 13.9 7.68 300 561 54.0 2.84 2.63 Maximum 23.8 8.27 335 561 69.0 2.840 2.630 Minimum 13.9 7.68 163 226 8.4 0.370 0.042 Average 17.6 7.92 264 432 49.0 2.222 1.542 #Tests 5 5 0 0 0 5 5 5 5 5 0 0 Site: SW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Cello Tailwater ALPINE COUNTY SURFACEWATER QUALITY DATA @ Brooke Diversion 2018 Coliforms Fecal < Blue Green Algae > Single Hard- • Total E.coli Strep < Colonies > < Filaments > <---Filamaments---> Cells D.O. SO4 ness Date MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 06/07/18 8.41 5.03 07/10/18 6.31 12.8 08/07/18 6.36 13.4 09/05/18 5.80 16.0 10/03/18 6.74 14.7 Maximum 8.41 16.00 Minimum 5.80 5.03 Average 6.72 12.39 #Tests 0 0 0 0 0 0 0 0 0 0 5 5 0 1 Site: SW-15 SOUTH TAHOE PUBLIC UTILITY-DISTRICT Stream:. Celio Tailwater ALPINE COUNTY SURFACEWATER QUALITY DATA @ Brooke Diversion __ From 1981 To: 2018 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L 01 15.7 7.73 245 398 44.0 1.40 1.35 02 14.1 7.69 220 325 36.9 1.27 1.13 03 13.5 7.45 255 395 44.6 1.35 1.24 04 13.2 7.49 228 373 46.2 1.80 1.76 05 12.1 7.42 173 239 27.3 1.23 1.20 06 13.8 7.47 207 311 33.7 1.54 1.49 07 13.7 7.65 268 413 46.7 2.08 1.95 08 13.7 7.60 221 348 39.9 1.83 1.70 09 12.8 7.50 173 250 21.1 0.95 0.64 10 10.5 7.71 116 160 15.2 0.54 0.49 11 14.4 7.88 189 204 33.0 1.09 0.89 12 13.4 7.23 189 314 27.3 1.27 1.09 13 17.8 7.48 313 • 494 52.8 1.89 1.66 14 17.2 7.56 291 520 54.0 2.76 2.20 15 17.3 7.47 296 478 46.2 2.22 2.04 16 17.7 7.23 1.2 267 433 43.7 1.83 1.63 17 19.7 7.73 229 402 40.6 1.26 1.13 -- 18 18 17.6 7.92 264 432 49.0 2.22 1.54 Maximum 19.7 7.92 1.2 313 520 54.0 2.76 2.20 Minimum 10.5 7.23 1.2 116 160 15.2 0.54 0.49 Average 14.9 7.57 1.2 230 361 39.0 1.59 1.40 #Tests 18 18 0 0 1 18 18 18 18 18 0 0 J Site: SW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Celio Tailwater ALPINE COUNTY SURFACEWATER QUALITY DATA @ Brooke Diversion From: 1981 To: 2018 Oil& TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Ca Mg Na SAR Na Year mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L % 01 4.43 2.96 0.29 1.39 6.11 02 2.98 1.94 0.18 1.87 5.03 , 03 2.72 2.14 0.24 2.96 5.92 04 5.15 4.77 0.27 3.41 8.83 05 3.61 2.98 0.15 1.77 5.53 06 4.98 4.02 0.29 3.12 8.39 07 6.47 4.77 0.25 2.31 9.02 08 3.44 2.59 0.32 3.42 6.15 09 1.39 0.05 0.04 1.00 2.43 10 0.48 0.02 0.07 1.10 1.64 11 1.94 0.67 0.28 2.33 4.55 12 5.80 4.15 0.17 1.04 7.01 13 3.01 3.59 0.36 3.09 5.34 14 6.01 5.47 0.71 4.09 10.81 15 4.84 3.40 0.91 4.40 10.11 16 4.25 3.00 0.70 2.44 7.38 17 2.22 1.83 0.44 2.71 5.41 18 9.94 10.59 0.46 2.29 12.69 Maximum 9.94 10.59 0.91 4.40 12.69 Minimum 0.48 0.02 0.04 1.00 1.64 Average 4.09 3.27 0.34 2.48 6.80 #Tests 18 18 18 18 18 0 0 0 0 0 0 0 0 Site: SW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Celio Tailwater ALPINE COUNTY SURFACEWATER QUALITY DATA @ Brooke Diversion From: 1981 To: 2018 Coliforms Fecal/ Fecal < Blue Green Algae > Single . Hard- Total E.coli Strep < Colonies > < Filaments > <---Filamaments---> Cells D.O. SO4 ness Year MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 01 7.99 14.47 02 8.34 10.85 03 5.36 14.46 04 6.54 11.95 05 7.03 8.55 06 6.24 10.43 07 6.32 12.81 08 6.76 11.13 09 7.80 6.66 10 7.14 6.31 11 7.17 8.81 12 8.30 7.58 13 8.04 17.43 14 6.04 15.86 15 • 5.93 15.34 16 8.30 14.03 17 6.82 9.96 18 6.72 12.39 Maximum 0 0 0 0 0 0 0 8.34 17.43 Minimum 0 0 0 0 0 0 0 5.36 6.31 Average 7.05 11.61 • #Tests 0 0 0 0 0 - 0 0 0 0 0 18 18 0 Site: SW-15 Nitrate-Nitrogen Total Phosphorus 10.0 10.0 -_ • 9.0 1 9.0 = 8.0 = 8.0 = 7.0 ; 7.0 • 6.0 = 6.0 = a) 5.0 `h 5.0 4.0 4.0 3.0 �` _ - ' 3.0 -` 2.0 = �V 2.0 1.0 1 1.0 -1 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 —0—Nitrate Linear(Nitrate) --4--Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 100 500 90 80 : 400 - 70 60 -1 S 300 -J - -J 13") 50 - E w 40 _ w A_ 200 - 30 = NVA" 20 1 100 - 10 -_ 01. 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 —9---Chlorides Linear(Chlorides) TDS Linear(TDS) Site: SW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Drain Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA @ Fairview Lane 2018 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K Date C pH mg/L - NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L 06/07/18 14.6 7.18 165 223 12.9 0.123 0.036 07/10/18 28.2 7.83 171 251 20.1 0.074 0.034 08/07/18 22.8 8.36 157 240 20.3 0.117 0.008 09/05/18 16.9 8.02 194 304 27 0.14 0.121 10/03/18 14.5 7.69 169 258 17.5 0.13 0.032 Maximum 28.2 8.36 194 304 27.0 0.140 0.121 Minimum 14.5 7.18 157 223 12.9 0.074 0.008 Average 19.4 7.82 171 255 19.6 0.117 0.046 #Tests 5 5 0 0 0 5 5 5 5 5 0 0 Site: SW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Drain Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA @ Fairview Lane 2018 Coliforms Fecal < Blue Green Algae > Single Hard- Total E.coli Strep < Colonies > < Filaments > <---Filamaments---> Cells D.O. SO4 ness Date MPN MPN MPN # cells # cells # urn #cells mg/L mg/L mg/L 06/07/18 8.64 3.38 07/10/18 8.69 6.61 08/07/18 11.2 6.87 09/05/18 10.2 11 10/03/18 5 10.1 5.24 Maximum 11.20 11.00 Minimum 5 8.64 3.38 Average 9.77 6.62 #Tests 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 1981 To: 2018 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L 01 02 14.5 7.53 177 263 21.5 0.06 0.02 03 15.6 7.67 159 233 19.5 0.10 0.03 04 15.1 7.50 154 226 18.9 0.19 0.02 05 14.8 7.30 158 206 21.7 0.09 0.03 06 15.3 7.37 154 206 18.9 0.12 0.06 07 15.7 7.59 160 227 17.8 0.07 0.02 08 15.6 7.70 165 244 20.3 0.08 0.03 09 17.1 7.64 193 301 23.5 0.60 0.33 10 14.8 7.43 192 282 25.7 0.15 0.03 11 15.6 7.70 161 228 20.7 0.22 0.10 12 19.6 7.38 152 231 15.5 0.11 0.03 13 18.0 7.31 181 253 19.9 0.10 0.03 14 19.0 7.60 196 266 20.7 0.06 0.02 15 17.3 7.31 184 277 21.5 0.07 0.02 16 17.7 7.24 3.3 183 273 22.5 0.09 0.02 17 18.5 7.25 177 251 17.9 0.17 0.05 18 19.4 7.82 171 255 19.6 0.12 0.05 Maximum 19.6 7.82 3.3 196 301 25.7 0.60 0.33 Minimum 14.5 7.24 3.3 152 206 15.5 0.06 0.02 Average 16.7 7.49 3.3 172 248 20.4 0.14 0.05 #Tests 17 17 • 0 0 1 17 17 17 17 17 0 0 ,\ Site: SW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Drain Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA @ Fairview Lane From: 1981 To: 2018 Oil& TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Ca Mg Na SAR Na Year mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L % 01 02 0.46 0.05 < 0.01 0.07 0.55 03 0.58 0.07 0.02 0.10 0.74 04 0.88 0.07 0.02 0.10 1.00 05 1.13 0.04 0.02 0.17 1.31 06 0.98 0.35 0.02 0.34 1.35 07 0.47 0.03 < 0.01 0.08 0.57 08 0.74 0.06 0.03 0.16 0.93 09 2.36 1.44 0.13 1.18 3.67 10 0.79 0.03 < 0.01 0.15 0.95 11 1.20 0.11 0.06 0.40 1.66 12 0.77 0.24 < 0.01 0.14 0.93 13 0.74 0.07 0.03 0.15 0.91 14 0.54 0.04 0.01 0.13 0.67 15 0.38 0.02 < 0.01 0.01 0.38 16 0.68 0.02 0.01 0.05 0.73 17 1.10 0.04 0.01 0.12 1.23 18 0.59 0.02 0.01 0.05 0.65 Maximum 2.36 1.44 0.13 1.18 3.67 Minimum 0.38 0.02 < 0.01 0.01 0.38 Average 0.85 0.16 0.03 0.20 1.07 #Tests 17 17 17 17 17 0 0 0 0 0 0 0 0 Site: SW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Drain Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA @ Fairview Lane From: 1981 To: 2018 Coliforms Fecal/ Fecal < Blue Green Algae > Single Hard- Total E.coli Strep < Colonies > < Filaments > <---Filamaments---> Cells D.O. SO4 ness Year MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 01 02 6.97 8.04 03 7.03 6.75 04 7.73 6.35 05 8.79 6.95 06 8.90 6.05 07 8.27 6.36 08 7.61 7.85 09 7.80 7.66 10 6.34 7.05 11 8.26 5.21 12 8.88 6.58 13 8.60 7.77 14 8.46 7.41 15 7.12 5.66 16 9.10 7.14 17 7.75 3.80 18 9.77 6.62 Maximum 0 0 0 0 0 0 0 9.77 8.04 Minimum 0 0 0 0 0 0 0 6.34 3.80 Average 8.08 6.66 #Tests 0 0 0 0 0 0 0 0 0 0 17 17 0 Site: SW-16 Nitrate-Nitrogen Total Phosphorus 5.0 1.0 -_ 0.9 4.0 0.8 = 0.7 1 3.0 0.6 = J 0.5 2.0 0:4 0.3 1.0 0.2 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 t Nitrate Linear(Nitrate) —4—Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 50 - 250 40 200 30 150 J 7 13) 20 ��.._, � 100 - 10 50 0 0 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 —�—Chlorides Linear(Chlorides) —0—TDS Linear(TDS) TRIHALOMETHANES (THM) & MTBE (Methyl tent-Butyl Ether) MONITORING MTBE Results Lower Sample Reporting Sample Site Date ID# Parameter Result Units Limit Method WWTP Final Effluent 02/12/2018 AG60068 MTBE ND ug/L 0.2 EPA8260 06/11/2018 AG61783 MTBE ND ug/L 0.2 EPA8260 08/29/2018 AG63050 MTBE . ND ug/L 0.2 EPA8260 11/29/2018 AG64334 MTBE ND ug/L 0.2 EPA8260 Harvey Place Reservoir 06/26/2018 AG62051 MTBE ND ug/L 0.2 EPA8260 HPR Effluent 06/26/2018 AG62050 MTBE ND ug/L 0.2 EPA8260 ND Limit ug/L =mrDmepeloteaoopawper Ren • ENVIRONMENTAL AGRICULTURAL Analytical Chemists July 9, 2018 South Tahoe Public Utility District Lab ID : SP 1808459 1275 Meadow Crest Drive Customer : 2-11369 South Lake Tahoe, CA 96150 Laboratory Report Introduction: This report package contains total of 5 pages divided into 3 sections: Case Narrative (1 pages) : An overview of the work performed at FGL. Sample Results (3 pages) : Results for each sample submitted. Quality Control (1 page) : Supporting Quality Control (QC)results. Case Narrative This Case Narrative pertains to the following samples: Sample Description Date Date FGL Lab ID# Matrix p p Sampled Received Travel Blank 06/26/2018 06/27/2018 SP 1808459-000 LBW DD-01 06/26/2018 06/27/2018 SP 1808459-001 WW HPR 06/26/2018 06/27/2018 SP 1808459-002 ,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 4 °C. All samples were prepared and analyzed within the method specified hold time. All samples were checked for pH if acid or base preservation is required(except for VOAs). For details of sample receipt information,please see the attached Chain of Custody and Condition Upon Receipt Form. Quality Control: All samples were prepared and analyzed according to the following tables: Organic QC 5030B 06/28/2018:207497 All preparation quality controls are within established criteria 8260B 06/28/2018:209698 All analysis quality controls are within established criteria 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 Reviewed and Digitally signed by David Tare,BA.,M.B.A. David Terz,B.A.,M.B.A. Title:QA Diraator Approved By Date:2018-07-10 Page 1 of 5 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA FLAP Certification No.2810 l MeV ENVIRONMENTAL _ AGRICULTURAL Analytical Chemists July 9, 2018 Lab ID : SP 1808459-000 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : June 26, 2018-00:00 South Lake Tahoe, CA 96150 Sampled By : Not Available Received On : June 27,2018-11:54 Matrix : Lab. Blank Water Description : Travel Blank Project : AG62052 Sample Result-Organic Constituent Result PQL MDL Units Dilution DQF Sample Preparation Sample Analysis Method ID Time Method ID Time EPA 8260 4-Bromofluorobenzene$ 79.4 78-123 % 1 5030B 20749706/28/18 06:00 8260B 209698-01v1214 06/28/18-20:20VRG Dibromofluoromethanet 83.5 65-125 % 1 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-20:20VRG 1,2-Dichloroethane-d41 85.0 58-144 % 1 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-20:2OVRG Toluene-d81 98.4 92-107 % 1 5030B 207497 06/28/18 06:00 8260E 209698-GM214 06/28/18-20:20VRG tent-Butanol ND 5 0.48 ug/L 1 U 5030B 207497.06/28/18 06:00 8260B 209698-GM214 06/28/18-20:20VRG Di-isopropyl ether(DIPE) ND 0.5 0.051 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-20:20VRG Ethyl tert-butyl ether(ETBE) ND 0.5 0.051 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-20:2OVRG • Methyl tea-but)/ether(MTBE) ND 0.2 0.036 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-20:20VRG tert-Amyl methyl ether(TAME) ND 0.5 0.037 ug/L 1 U 5030B. 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-20:20VRG DQF Flags Definition: U Constituent results were non-detect. ND=Non-Detected.PQL—Practical Quantitation Limit. .Surrogate. Page 2 of 5 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 /. ENVIRONMENTAL' ___ AGRICULTURAL Analytical Chemists July 9, 2018 Lab ID : SP 1808459-001 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : June 26, 2018-09:23 South Lake Tahoe, CA 96150 Sampled By : Not Available Received On : June 27, 2018-11:54 Matrix : Waste Water Description : DD-01 Project : AG62050 Sample Result-Organic Constituent Result PQL MDL —Units Dilution DF Sample Preparation Sample Analysis_ Method ID Time Method ID Time EPA 8260 4-Bromofluorobenzenet 83.4 78-123 % 1 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG DibromofluoromethaneI 83.9 65-125 % 1 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG 1,2-Dichloroethane-d4I 92.3 58-144 % 1 5030E 207497 06/28/18 06:00 826013 209698-GM21406/28/18-19:20VRG Toluene-d81 98.3 92-107 % 1 5030B 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:20VRG tert-Butanol ND 5 0.48 ug/L 1 U 503013 207497 06/28/18 06:00 8260B 209698-GIv1214 06/28/18-I9:2OVRG Di-isopropyl ether(DIPE) ND 0.5 0.051 ug/L 1 U 503013 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG Ethyl tert-butyl ether(ETBE) ND 0.5 0.051 ug/L 1 U 5030B 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:2OVRG Methyl tert-butyl ether(MTBE) ND 0.2 0.036 ug/L 1 U 503013 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG tert-Amyl methyl ether(TAME) ND 0.5 0.037 ug/L 1 U 5030B 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:20VRG DQF Flags Definition: U Constituent results were non-detect. ND=Non-Detected.PQL=Practical Quantitation Limit.jSurrogate. Page 3 of 5 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 l ENVIRONMENTAL AGRICULTURAL Analytical Chemists July 9, 2018 Lab ID : SP 1808459-002 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : June 26, 2018-09:36 South Lake Tahoe, CA 96150 Sampled By : Not Available Received On : June 27, 2018-11:54 Matrix : Waste Water Description : HPR Project : AG6205-1 Sample Result-Organic Constituent Result PQL MDL Units Dilution DQF Sample Preparation Sample Analysis Method ID Time Method ID Time EPA 8260 4-Bromofluorobenzenet 80.6 78-123 % 1 5030B 207497 06/28/18 06:00 8260B 209698-G1V1214 06/28/18-19:50VRG DibromofluoromethaneI 84.3 65-125 % 1 5030B 207497 06/28/18 06:00 8260B 209698-GM2I4 06/28/18-19:50VRG 1,2-Dichloroethane-d4t 84.0 58-144 % 1 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG Toluene-d81 97.5 92-107 % 1 503013 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:50VRG tert-Butanol ND 5 0.48 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG Di-isopropyl ether(DIPE) ND 0.5 0.051 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG Ethyl tert-butyl ether(ETBE) ND 0.5 0.051 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:5OVRG Methyl tert-butyl ether(MTBE) ND 0.2 0.036 ug/L 1 U 5030E 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG tert-Amyl methyl ether(TAME) ND 0.5 0.037 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG _ DQF Flags Definition: U Constituent results were non-detect. ND=Non-Detected.PQL=Practical Quantitation Limit.tSurrogate. Page 4 of 5 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 J` / ENVIRONMENTAL -_ AQRICULTURAL Analytical Chemists July 9, 2018 Lab ID SP 1808459 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Conc. QC Data DQO Note Organic 1,2-Dichloroethane-d4 5030B 06/28/18:207497VRG Blank ug/L 25.00 93.6% 58-144 , LCS ug/L 25.00 83.5% 58-144 . MS ug/L 25.00 89.2% 58-144 (SP 1808459-001) MSD ug/L 25.00 89.2% 58-144 MSRPD ug/L 25.00 0.08% <20.0 4-Bromofluorobenzene 5030B 06/28/18:207497VRG Blank ug/L 25.00 80.9% 78-123 LCS ug/L 25.00 80.5% 78-123 MS ug/L 25.00 82.5% 78-123 (SP 1808459-001) MSD ug/L 25.00 78.9% 78-123 MSRPD ug/L 25.00 4.5% <20.0 Dibromofluromethane 5030B 06/28/18:207497VRG Blank ug/L 25.00 82.0% 65-125 LCS ug/L 25.00 84.7% 65-125 MS ug/L 25.00 83.8% 65-125 (SP 1808459-001) MSD ug/L 25.00 85.3% 65-125 MSRPD ug/L 25.00 1.8% <20.0 Ethyl tert-Butyl Ether 5030B 06/28/18:207497VRG Blank ug/L ND <2 Isopropyl Ether , 5030B .06/28/18:207497VRG Blank ug/L ND <5 Methyl tert-Butyl Ether(MTBE) 5030B 06/28/18:207497VRG Blank ug/L ND <2 TAME 5030B 06/28/18:207497VRG Blank ug/L ND <5 tert-Butanol 5030B 06/28/18:207497VRG Blank ug/L ND <5 Toluene-d8 5030B 06/28/18:207497VRG Blank ug/L 25.00 103% 92-107 LCS ug/L 25.00 99.9% 92-107 ' MS ug/L 25.00 99.2% 92-107 (SP 1808459-001) MSD ug/L 25.00 99.9% 92-107 MSRPD ug/L 25.00 0.7% <20 1,2-Dichloroethane-d4 8260B 06/28/18:209698VRG CCV ug/L 25.00 92.1% 70-130 4-Bromofluorobenzene(BFB) 8260B 06/28/18:209698VRG CCV ug/L 25.00 80.4% 70-130 Dibromofluromethane 8260B 06/28/18:209698VRG CCV ug/L 25.00 82.3% 70-130 Ethyl tert-Butyl Ether 8260B 06/28/18:209698VRG CCV ug/L 25.00 104% 50-150 Isopropyl Ether 8260B 06/28/18:209698VRG CCV ug/L 25.00 107% 50-150 Methyl tert-Butyl Ether 8260B 06/28/18:209698VRG CCV ug/L 25.00 90.2% 70-130 TAME 8260B 06/28/18:209698VRG CCV ug/L 25.00 126% 50-150 tert-Butanol 8260B 06/28/18:209698VRG CCV ug/L 125.0 115% 50-150 Toluene-d8 8260B 06/28/18:209698VRG CCV ug/L 25.00 99.0% 70-130 Definition CCV :Continuing Calibration Verification-Analyzed to verify the instrument calibration is within criteria. Blank ':Method Blank-Prepared to verify that the preparation process is not contributing contamination to the samples. LCS :Laboratory Control Standard/Sample-Prepared to verify that the preparation process is not affecting analyte recovery. MS :Matrix Spikes-A random sample is spiked with a known amount of analyte.The recoveries are an indication of how that sample matrix affects analyte recovery. MSD :Matrix Spike Duplicate of MS/MSD pair-A random sample duplicate is spiked with a known amount of analyted.The recoveries are an indication of how that sample matrix affects analyte recovery. • MSRPD :MS/MSD Relative Percent Difference(RPD)-The MS relative percent difference is an indication of precision for the preparation and analysis. ND :Non-detect-Result was below the DQO listed for the analyte. DQO :Data Quality Objective-This is the criteria against which the quality control data is compared. Page 5 of 5 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 ENVIRONMENTAL . . AGRICULTURAL Analytical Chemists August 15, 2018 South Tahoe Public Utility District Lab ID : SP 1808459 1275 Meadow Crest Drive Customer : 2-11369 South Lake Tahoe, CA 96150 Laboratory Report Introduction: This report package contains total of 12 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 (4 pages) : Supporting Quality Control(QC)results. Case Narrative This Case Narrative pertains to the following samples: Sample Description Date Date FGL Lab ID# Matrix p p Sampled Received DD-01 06/26/2018 06/27/2018 SP 1808459-001 WW HPR 06/26/2018 06/27/2018 SP 1808459-002 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 4 °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 06/28/2018:207497 All preparation quality controls are within established criteria,except: 5030B The following note applies to 1,1-Dichloroethylene,Benzene,Trichloroethylene(TCE),Chlorobenzene, Toluene: 435 Sample matrix may be affecting this analyte.Data was accepted based on the LCS or CCV recovery. 06/28/2018:209698 All analysis quality controls are within established criteria,except: 8260B The following note applies to 1,2,3-Trichlorobenzene, 1,2,4-Trichlorobenzene, 1,4-Dichlorobenzene, • Tetrachloroethylene(PCE),Hexachlorobutadiene,DBC: 360 CCV above Acceptance Range(AR). Samples which were non detect for this analyte were accepted. Discussion of Analytical Results: Amended Report SP 1808459-001 DD-01 Amended to report additional EPA 8260 analytes. (08/16/18) SP 1808459-002 HPR Amended to report additional EPA 8260 analytes. (08/16/18). Amended Page 1 of 12 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road . 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 August 15, 2018 Lab ID : SP 1808459 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:VT Digitally signed by David Tara,B.A.,M.B.A. Approved By David Terz,B.A.,M.B.A. Title:QA Dinxtor Date:2018-08-15 • • Amended Page 2 of 12 • WiE ENVIRONMENTAL . AGRICULTURAL Analytical Chemists August 15, 2018 Lab ID : SP 1808459-001 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : June 26, 2018-09:23 South Lake Tahoe, CA 96150 Sampled By : Not Available Received On : June 27, 2018-11:54 Matrix : Waste Water Description : DD-01 Project : AG62050 Sample Result-Organic Constituent Result PQL MDL Units Dilution DQF Sample Preparation Sample Analysis Method ID Time Method ID Time EPA 82605 4-BromofluorobenzeneI 83.4 78-123 % 1 50300 207497 06/28/18 06:00 8260B 209698-0M214 06/28/18-1920VRG DibromofluoromethaneI 83.9 65-125 % 1 50300 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG 1,2-Dichloroethane-d41 92.3 58-144 % 1 503011 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:2OVRG Toluene-d81 98.3 92-107 % 1 503013 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG Acetone ND 10 1.7 ug/L 1 U 50300 207497 06/28/18 06:00 8260E 209698-GM214 06/28/18-19:20VRG Benzene ND 1 0.088 ug/L 1 U 503.013 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG Bromobenzene ND 1 0.054 ug/L 1 U 503013 207497 06/28/18 06:00 82601 209698-GM214 06/28/18-19:2OVRG Bromochloromethane ND 1 0.046 ug/L 1 U 50300 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:20VRG Bromodichloromethane ND 1 0.067 ug/L 1 U 5030B 207497 06/28/18 06:00 82601 209698-0M214 06/28/18-19:20VRG Bromoform ND 1 0.055 ug/L - 1 U 5030B 207497 06/28/18 06:0(1 826013 209608-GM214 06/28/1,8-19:20VRG Bromomethane ND 1 0.12 ug/L 1 U 5030E 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG Cert-Butanol ND 5 0.48 ug/L 1 U 5030E 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG 2-Butanone(MEK) ND 10 2.2 ug/L 1 U 503013 21)7497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:2OVRG n-Butylbenzene ND. 1 0.13 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG sec-Butylbenzene ND 1 0.097 ug/L 1 U 5030B 20749706/28/18 06:00 826013 209698-GM214 06/28/18-19:20VRG tert-Butylbenzene ND 1 0.097 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:2OVRG Carbon Disulfide ND 1 6.8 ug/L 1 U 5030E 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG Carbon Tetrachloride ND 1 0.18 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG Chlorobenzene ND 1 0.066 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GIV1214 06/28/18-19:20VRG Chloroethane ND 1 0.29 ug/L 1 U 503013 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG Amended Page 3 of 12 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Linde 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:(8.05)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 August 15, 2018 Lab ID : SP 1808459-001 South Tahoe Public Utility District Description : DD-01 Sample Result-Organic Constituent Result PQL MDL Units Dilution DQF Sample Preparation Sample Analysis Method ID Time Method ID Time EPA 8260 Chloroform 0.198 1 0.088 ug/L 1 J 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG Chloromethane ND 1 0.097 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG 2-Chlorotoluene ND 1 0.072 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG 4-Chlorotoluene ND 1 0.15 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG 1,2-Dibrorno-3-chloropropane ND 1 0.13 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG Dibromochloromethane ND 2 0.060 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG Dibromomethane ND 1 0.048 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG 1,2-Dichlorobenzene ND 1 0.18 ug/L 1 a U 5030B 207497 06/28/18 06:00 8260B 209698-G1\4214 06/28/18-19:20VRG 1,3-Dichlorobenzene ND 1 0.061 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG 1,4-Dichlorobenzene ND 1 0.24 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG Dichlorodifluoromethane ND 1 0.23 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-61\1214 06/28/18-19:20VRG 1,1-Dichloroethane ND 1 0.13 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG l,2-Dichloroethane ND 1 0.065 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG 1,1-Dichloroethylene ND 1 0.17 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG cis-1,2-Dichloroethylene ND 1 0.13 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG trans-1,2-Dichloroethylene ND 1 0.22 ug/L 1 U 51)30B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG 1,2-Dichloropropane ND 1 0.089 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG 1,3-Dichloropropane ND 1 0.049 ug/L 1 U 5030B- 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG 2,2-Dichloropropane ND 1 0.11 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG 1,1-Dichlor-opropene ND 1 0.14 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG Di-isopropyl ether(DIPE) ND 0.5 0.051 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG Ethyl Benzene ND 1 0.099 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-G1\4214 06/28/18-19:20VRG Ethyl tert-butyl ether(ETBE) ND 0.5 0.051 ug/L 1 U 5030B 207497 06/28/18 06:00 8260E 209698-GM214 06/28/18-19:20VRG Hexachlorobutadiene ND 1 0.17 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG 2-Hexanone ND 10 2.4 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-0M214 06/28/18-19:20VRG Isopropylbenzene ND 1 0.037 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG p-Isopropyltoluene ND 1 0.095 ug/L 1 U 5030B 207497 06/28/18(16:00 8260B 209698-GM214 06/28/18-19:20VRG Methyl tert-butyl ether(MTBE) ND 0.2 0.036 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG 4-Methyl-2-pentanone(MIBK) ND 10 0.58 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG • - Methylene Chloride ND 1 0.065 ug/L 1 U 5030B 207497 06/28/18 06:00 8260E 209698-GM214 06/28/18-19:20VRG Amended Page 4 of 12 August 15, 2018 Lab ID .: SP 1808459-001 South Tahoe Public Utility District Description : DD-01 Sample Result-Organic Constituent Result PQL MDL Units Dilution DQF Sample Preparation Sample Analysis Method ID Time Method ID Time EPA 8260 Naphthalene _ ND 1 0.13 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG n-Propylbenzene ND 1 0.089 ug/L 1 U 5030E 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG Styrene ND 1 0.061 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG tert-Amyl methyl ether(TAME) ND 0.5 0.037 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG 1,1,1,2-Tetrachloroethane ND 1 0.099 ug/L 1 U 5030B 207497 06/28/18 06:00 8260E 209698-GM214 06/28/18-19:20VRG 1,1,2,2-Tetrachloroethane ND 1 0.12 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG Tetrachloroethylene ND 1 0.31 ug/L 1 U 50300 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:20VRG Toluene ND 1 0.11 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG 1,2,3-Trichlorobenzene ND 1 0.13 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG 1,2,4-Trichlorobenzene ND 1 0.16 ug/L 1 U 50300 207497 06/28/18 06:00 82600 209698-GM214 06/28/18-19:20VRG 1,1,1-Trichloroethane ND 1 0.14 ug/L 1 U 5030B 207497 06/28/18 06:00 ' 8260B 209698-GM214 06/28/18-19:20VRG 1,1,2-Trichloroethane ND 1 0.058 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG Trichloroethylene ND 1 0.13 ug/L 1 U 5030E 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:20VRG Trichlorofluoromethane ND 1 0.13 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG 1,2,3-Trichloropropane ND 1 0.095 ug/L 1 U 503013 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:20VRG 1,2,4-Trimethylbenzene ND 1 0.076 ug/L . 1 U 5030B 207497 1)6/28/18(16:00 826013 209698-GIM1214 06/28/18-19:20VRG 1,3,5-Trimethylbenzene ND 1 0.10 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG Vinyl Acetate ND _ 100 20 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG Vinyl Chloride ND 1 0.17 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG Xylenes m,p ND 1 0.11 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG Xylenes o ND 1 0.064 ug/L 1 U 503013 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG 2-Chloroethylvinylether ND 10 2.2 ug/L 1 U 5030E 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:20VRG 1,1,2-Trichlorotritluoroethane ND 1 0.19 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:20VRG DQF Flags Definition: U Constituent results were non-detect. J Reported value is estimated;detected at a concentration below the PQL and above the laboratory MDL. - ND=Non-Detected.PQL=Practical Quantitation Limit.$Surrogate. - • Amended Page 5 of 12 C ENVIRONMENTAL AGRICULTURAL Analytical Chemists August 15, 2018 Lab ID . : SP 1808459-002 Customer ID : 2-1.1369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : June 26, 2018-09:36 ' South Lake Tahoe, CA 96150 Sampled By : Not Available Received On : June 27, 2018-11:54 Matrix : Waste Water Description : HPR Project : AG62051 Sample Result Organic Constituent Result PQL MDL Units Dilution DQF Sample Preparation Sample Analysis Method ID Time Method ID Time . EPA 8260 _ 4-Bromofluorobenzene1 80.6 78-123 % 1 5030B 207497 06/28/18 06:00 8260B 209698-01v1214 06/28/18-19:50VRG Dibromofluoromethanet 84.3 65-125 % 1 5030B 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:50VRG 1,2-Dichloroethane-d41 84.0 58-144 % 1 5030E 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:5OVRG Toluene-d81 97.5 92-107 % 1 503013 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:50VRG Acetone ND 10 1.7 ug/L 1 U 503013 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:50VRG Benzene ND 1 0,088 ug/L 1 U 503013 207497 06/28/18 06:00 826013 - 209698-GM214 06/28/18-19:50VRG Bromobenzene ND 1 0.054 ug/L 1 U 5030E 207497 06/28/18 06:00 8260B 209698-0M214 06/28/18-19:50VRG Bromochloromethane ND 1 0.046 ug/L 1 U 503013 207497 06/28/1.8 06:00 826013 209698-GM214 06/28/18-19:50VRG Bromodichloromethane ND 1 0.067 ug/L 1 U 5030B 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:50VRG Bromoform ND 1 0.055 ug/L 1 U 5030B 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:50VRG Bromomethane ND 1 0.12 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG tert-Butanol ND 5 0.48 ug/L '1 U 503013 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG 2-Butanone(MEK) ND 10 2.2 ug/L 1 U 503013 207497 06/28/18 06:00 8260B 209698-G1\4214 06/28/18-19:50VRG n-Butylbenzene ,ND 1 0.13 ug/L 1 U 503013 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG sec-Butylbenzene ND 1 0.097 ug/L 1 U 503013 207497 06/28/18 06:00 8260B 209698-G1v1214 06/28/18-19:5OVRG tert-Butylbenzene ND 1 0.097 ug/L 1 U 5030E 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG Carbon Disulfide ND 1 6.8 ug/L 1 U 503013 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG Carbon Tetrachloride ND 1 0.18 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG Chlorobenzene ND 1 0.066 ug/L 1 U 5030B 207497 06/28/1806:00 8260B 209698-0M214 06/28/18-19:50VRG Chloroethane ND 1 0.29 ug/L 1 U 503013 207497 06/28/18 06:00 8260B 209698-G1\4214 06/28/18-19:50VRG Amended Page'6 of 12 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 - CA ELAP Certification No.1563 CA CLAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 • August 15, 2018 Lab ID : SP 1808459-002 South Tahoe Public Utility District Description : HPR Sample Result-Organic Constituent Result PQL MDL Units Dilution DQF Sample Preparation Sample Analysis Method ID Time Method ID Time EPA 8260 Chloroform ND 1 0.088 ug/L 1 U 5030B 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:50VRG Chloromethane ND 1 0.097 ug/L 1 U 5030B 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:50VRG 2-Chlorotoluene ND 1 0.072 ug/L 1 U 5030B 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:5OVRG 4-Chlorotoluene ND 1 0.15 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM2I4 06/28/18-19:50VRG 1,2-Dibromo-3-chloropropane ND 1 0.13 ug/L 1 U 5030B 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-I9:50VRG Dibromochloromethane ND 2 0.060 ug/L 1 U 5030B 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:50VRG Dibromomethane ND 1 0.048 ug/L 1 U 503013 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:50VRG 1,2-Dichlorobenzene ND 1 0.18 ug/L 1 U 5030E 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG 1,3-Dichlorobenzene —ND 1 0.061 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG 1,4-Dichlorobenzene ND 1 0.24 ug/L 1 U 503013 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:50VRG Dichlorodifluoromethane ND 1 0.23 ug/L 1 U 5030B 207497 06/28/18 06:00 8260E 209698-GM214 06/28/18-19:50VRG 1,1-Dichloroethane ND 1 0.13 ug/L 1 U 503013 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:50VRG 1,2-Dichloroethane ND 1 0.065 ug/L 1 U '5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG 1,1-Dichloroethylene ND 1 0.17 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM2I4 06/28/18-19:50VRG cis-1,2-Dichloroethylene ND 1 0.13 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG trans-1,2-Dichloroethylene ND 1 0.22 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM2I4 06/28/18-19:50VRG 1,2-Dichloropropane ND 1 0.089 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG 1,3-Dichloropropane ND 1 0.049 ug/L --1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG 2,2-Dichloropropane ND 1 0.11 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG 1,1-Dichloropropene ND 1 0.14 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG Di-isopropyl ether(DIPE) ND 0.5 0.051 ug/L 1 U 503013 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:50VRG Ethyl Benzene ND 1 0.099 ug/L 1 U 5030B 207497 06/28/18 06:00 826013 209698-0M214 06/28/18-19:50VRG Ethyl tert-butyl ether(ETBE) ND 0.5 0.051 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG Hexachlorobutadiene ND 1 0.17 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-0M214 06/28/18-19:5OVRG 2-Hexanone ND 10 2.4 ug/L 1 U 5030B 207497 06/28/18 06:00 \ 826013 209698-G1\4214 06/28/18-19:50VRG Isopropylbenzene ND 1 0.037 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG p-Isopropyltoluene ND . 1 0.095 ug/L 1 U 5030B 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:50VRG Methyl tert-butyl ether(MTBE) ND 0.2 0.036 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG 4-Methyl-2-pentanone(MIBK) ND 10 0.58 ug/L 1 U 503013 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:50VRG Methylene Chloride ND 1 0.065 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG Amended Page 7 of 12- August 15, 2018 Lab ID : SP 1808459-002 South Tahoe Public Utility District Description : HPR Sample Result-Organic Constituent Result PQL MDL Units Dilution DQF Sample Preparation Sample Analysis Method ID Time Method ID Time EPA 8260 • Naphthalene ND 1 0.13 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/I8-19:50VRG n-Propylbenzene ND 1 0.089 ug/L 1 U . 5030B 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:50VRG Styrene ND 1 0.061 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG tent-Amyl methyl ether(TAME) ND 0.5 0.037 ug/L 1 U 5030B 207497 06/28/18 06:00 826011 209698-GM214 06/28/18-19:50VRG 1,1,1,2-Tetrachloroethane ND 1 0.099 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG 1,1,2,2-Tetrachloroethane ND 1 0.12 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG Tetrachloroethylene ND 1 0.31 ug/L 1 U 503013 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:50VRG Toluene ND 1 0.11 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG 1,2,3-Trichlorobenzene ND 1 0.13 ug/L 1 U 503013 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG 1,2,4-Trichlorobenzene ND 1 0.16 ug/L 1 U 503013 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:50VRG 1,1,1-Trichloroethane ND 1 0.14 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG 1,1,2-Trichloroethane ND 1 0.058 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG Trichloroethylene ND 1 0.13 ug/L 1 U 5030B 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:50VRG Trichlorofluoromethane ND 1 0.13 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG 1,2,3-Trichloropropane ND 1 0.095 ug/L 1 U 5030B 207497 06/28/18 06:00 826013 - 209698-GM214 06/28/18-19:50VRG 1,2,4-Trimethylbenzene ND 1 0.076 ug/L 1 U 5030B 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:SOVRG 1,3,5-Trimethylbenzene ND 1 0.10 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG Vinyl Acetate ND 100 20 ug/L 1 U 5030B 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:50VRG Vinyl Chloride ND 1 0.17 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG Xylenes m,p ND 1 0.11 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG Xylenes o ND 1 0.064 ug/L 1 U 503013 207497 06/28/18 06:00 826013 209698-GM214 06/28/18-19:50VRG 2-Chloroethylvinylether ND 10 2.2 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG 1,1,2-Trichlorotrifluoroethane ND 1 0.19 ug/L 1 U 5030B 207497 06/28/18 06:00 8260B 209698-GM214 06/28/18-19:50VRG DQF Flags Definition: U Constituent results were non-detect. ND=Non-Detected.PQL=Practical Quantitation Limit.$Surrogate. • Amended Page 8 of 12 ENVIRONMENTAL _ AGRICULTURAL Analytical Chemists ' August 15, 2018 Lab ID : SP 1808459 South Tahoe Public Utility District • Customer : 2-11369 Quality Control-Organic Constituent Method Date/ID Type Units Conc. QC Data DQO Note Organic 1,1,1,2-Tetrachloroethane 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 1,1,1-Trichloroethanc(TCA) 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 1,1,2,2-Tetrachloroethane 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 1,1,2-Trichloroethane 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 1,\1,2-Trichlorotrifluoroethane 5030B 06/28/18:207497VRG Blank ug/L ND <1 1,1-Dichloroethane 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 1,1-Dichloroethylene 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 LCS ug/L 25.00 58.5% 52-137 MS,.. ug/L 25.00 61.3% 25-179 (SP 1808459-001) MSD ug/L 25.00 99.0% 25-179 MSRPD ug/L 25.00 47.0% <26 435 1,1-Dichloropropene 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 1,2,3-Trichlorobenzene 5030B , 06/28/18:207497VRG Blank ug/L ND <0.5 1,2,3-Trichloropropane 5030B 06/28/18:207497VRG Blank ug/L ND <1 1,2,4-Trichlorobenzene 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 1,2,4-Triinethylbenzene 5030B 06/28/18:207497VRG Blank ug/L • ND <0.5 1,2-Dichlorobenzene ,5030B 06/28/18:207497VRG Blank ug/L ND <0.5 1,2-Dichloroethane(EDC) 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 1,2-Dichloroethane-d4 5030B 06/28/18:207497VRG i Blank ug/L 25.00 93.6% 58-144 LCS ug/L 25.00 83.5% 58-144 MS ug/L 25.00 89.2%, 58-144 (SP 1808459-001) MSD ug/L 25.00 89.2% 58-144 MSRPD ug/L 25.00 0.08% 20.0 1,2-Dichloropropane 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 1,3,5-Trimethylbenzene 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 1,3-Dichlorobenzene 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 1,3-Dichloropropane 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 1,4-Dichlorobenzene 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 2,2-Dichloropropane 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 2-Butanone(MEK) 5030B 06/28/18:207497VRG Blank . ug/L ND <10 2-Chloroethylvinyl ether 5030B 06/28/18:207497VRG Blank ug/L ND <10 2-Chlorotoluene ' 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 2-Hexanone 5030B 06/28/18:207497VRG I'Blank ug/L ND <10 k4-Bromofluorobenzene 5030B 06/28/18:207497VRG Blank ug/L , 25.00 80.9% 78-123 LCS ug/L 25.00 80.5% 78-123 MS ug/L 25.00 82.5% 78-123 (SP 1808459-001) MSD ug/L 25.00 78.9% 78-123 MSRPD , ug/L 25.00 4.5% <20.0 4-Chlorotoluene 5030B. 06/28/18:207497VRG Blank ug/L ND <0.5 4-Methyl-2-pentanone(MIBK) 5030B 06/28/18:207497VRG Blank ug/L ND <10 Acetone 5030B 06/28/18:207497VRG Blank ug/L ND <50 Benzene 5030B 06/28/18:207497VRG Blank ug/L ' ND <0.5 LCS ug/L 25.00 96.2% 60-134 MS ug/L 25.00 103% 47-169 (SP 1808459-001) MSD ug/L 25.00 161% 47-169 MSRPD ug/L 25.00 43.6% <24 435 Bromobenzene 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 Bromochloromethane 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 ,, Bromodichloromethane 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 Bromoform 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 Bromomethane(Methyl Bromide) 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 Carbon Disulfide 5030B 06/28/18:207497VRG Blank ug/L ND <10 Carbon Tetrachloride 5030B 06/28/18:207497VRG Blank ug/L ND <1 Chlorobenzene 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 LCS ug/L 25.00 122% 56-152 Amcnd..d Page 9 of 12 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807, FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 August 15, 2018 Lab ID : SP 1808459 South Tahoe Public Utility District Customer : 2-11369 Quality Control-Organic Constituent Method Date/ID Type Units Cone. QC Data DQO Note Organic Chlorobenzene 5030B MS ug/L 25.00 122% 31-212 (SP 1808459-001) MSD ug/L 25.00 207% 31-212 MSRPD ug/L 25.00 51.4% <27 435 Chloroethane(Ethyl Chloride) 5030B 06/28/18:207497VRG Blank ug/L ND <1 Chloroform 5030B 06/28/18:207497VRG Blank ug/L ND <1 Chloromethane(Methyl Chloride) 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 cis-1,2-Dichloroethylene 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 DBCP 5030B 06/28/18:207497VRG Blank ug/L - ND <5 Dibromochloromethane 5030B 06/28/18:207497VRG Blank ug/L ND <I Dibrbmofluromethane 5030B 06/28/18:207497VRG Blank ug/L 25.00 82.0% 65-125 LCS ug/L 25.00 84.7% 65-125 MS ug/L 25.00 83.8% 65-125 (SP 1808459-001) MSD, ug/L 25.00 85.3% 65-125 MSRPD ug/L 25.00 1.8% <20.0 Dibromomethane 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 Dichlorodifluoromethane 5030B 06/28/18:207497VRG Blank ug/L , ND <0.5 Dichloromethane 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 Ethyl tert-Butyl Ether 5030B 06/28/18:207497VRG Blank ug/L ND <2 Ethylbenzene 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 Freon-11 5030B 06/28/18:207497VRG Blank ug/L ND <1 Hexachlorobutadienc 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 • Isopropyl Ether 5030B 06/28/18:207497VRG Blank ug/L ND <5 Isopropylbenzene 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 Methyl tert-Butyl Ether(MTBE) 5030B 06/28/18:207497VRG Blank ug/L ND <2 Naphthalene 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 n-Butylbenzene 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 n-Propylbenzene 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 p-Isopropyltoluene 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 sec-Butylbenzene 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 Styrene 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 TAME 5030B 06/28/18:207497VRG Blank ug/L ND <5 tert-Butanol 5030B 06/28/18:207497VRG Blank ug/L ND <5 tert-Butylbenzene 5030B 06/28/18:207497VRG Blank ¢ ug/L ND <0.5 Tetrachloroethylene(PCE) 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 Toluene 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 LCS ug/L 25.00 92.4% 56-131 MS ug/L 25.00 98.7% 44-164 • (SP 1808459-001) MSD ug/L 25.00 151% 44-164 MSRPD ug/L 25.00 42.2% <30 435 Toluene-d8 5030B ' 06/28/18:207497VRG Blank ug/L 25.00 103% 92-107 LCS ug/L 25.00 99.9% 92-107 MS ug/L 25.00 99.2% 92-107 (SP 1808459-001) MSD ug/L 25.00 . 99.9% 92-107 MSRPD ug/L 25.00 0.7% <20 trans-1,2-Dichloroethylene 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 Trichloroethylene(TCE) 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 LCS ug/L 25.00 81.0% 61-123 MS ug/L 25.00 86.0% 41-167 (SP 1808459-001) MSD ug/L 25.00 137% 41-167 MSRPD ug/L 25.00 45.9% <32 435 Vinyl Acetate 5030B 06/28/18:207497VRG Blank ug/L ND <10 Vinyl Chloride 5030B 06/28/18:207497VRG Blank ug/L ND <0.5 Xylenes m,p 5030B 06/28/18:207497VRG Blank ug/L' ND <2 Xylenes o 5030B 06/28/18:207497VRG Blank ug/L ND <2 Amended Page 10 of 12 August 15, 2018 Lab ID : SP 1808459 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic . Constituent Method Date/ID Type Units Conc. QC Data DQO Note Organic 1,1,1,2-Tetrachloroethane 8260B 06/28/18:209698VRG CCV ug/L 25.00 109% 70-130 1,1,1-Trichloroethane(TCA) 8260B 06/28/18:209698VRG CCV ug/L 25.00 102% 70-130 1,1,2,2-Tetrachloroethane 8260B 06/28/18:209698VRG CCV ug/L 25.00 121% 70-130 1,1,2-Trichloroethane 8260B 06/28/18:209698VRG CCV ug/L 25.00 128% 70-130 1,1-Dichloroethane 8260B 06/28/18:209698VRG CCV ug/L 25.00 85.6% 70-130 1,1-Dichloroethylene 8260B 06/28/18:209698VRG CCV ug/L 25.00 90.1% 80-120 1,1-Dichloropropene 8260B 06/28/18:209698VRG CCV ug/L 25.00 124% 70-130 1,2,3-Trichlorobenzene 8260B 06/28/18:209698VRG CCV ug/L 25.00 421% 70-130 360 1,2,3-Trichloropropane 8260B 06/28/18:209698VRG CCV ug/L 25.00 114% 70-130 1,2,4-Trichlorobenzene 8260B 06/28/18:209698VRG CCV ug/L 25.00 268% 70-130 360 1,2,4-Trimethylbenzene 8260B 06/28/18:209698VRG CCV ug/L 25.00 96.8% 70-130 1,2-Dichlorobenzene 8260B 06/28/18:209698VRG CCV ug/L 25.00 125% 70-130 1,2-Dichloroethane(EDC) 8260B 06/28/18:209698VRG CCV ( ug/L 25.00 102% 70-130 1,2-Dichloroethane-d4 8260B 06/28/18:209698VRG CCV ug/L 25.00 92.1% 70-130 1,2-Dichloropropane 8260B 06/28/18:209698VRG CCV ug/L 25.00 120% 80-120 1,3,5-Trimethylbenzene 8260B 06/28/18:209698VRG CCV ug/L 25.00 95.9% 70-130 1,3-Dichlorobenzene 8260B 06/28/18:209698VRG CCV ug/L 25.00 129% 70-130 \ 1,3-Dichloropropane 8260B 06/28/18:209698VRG CCV ug/L 25.00 107% 70-130 1,4-Dichlorobenzene 8260B 06/28/18:209698VRG CCV ug/L 25.00 134% 70-130 360 2,2-Dichloropropane 8260B 06/28/18:209698VRG CCV ug/L 25.00 75.4% 70-130 2-Chlorotoluene 8260B 06/28/18:209698VRG CCV ug/L 25.00 105% 70-130 4-Bromofluorobenzene(BFB) 8260B 06/28/18:209698VRG CCV ug/L 25.00 80.4% 70-130 4-Chlorotoluene 8260B 06/28/18:209698VRG CCV ug/L 25.00 94.8%. 70-130 Benzene 8260B 06/28/18:209698VRG CCV ug/L 25.00 124% 70-130 Bromobenzene 8260B 06/28/18:209698VRG CCV, ug/L 25.00 112% 70-130 Bromochloromethane 8260B 06/28/18:209698VRG CCV ug/L 25.00 121% 70-130 Bromodichloromethane 8260B 06/28/18:209698VRG CCV ug/L 25.00 100% 70-130 Bromoform 8260B 06/28/18:209698VRG CCV ug/L 25.00 104% 70-130 Bromomethane(Methyl Bromide) 8260B 06/28/18:209698VRG CCV ug/L 25.00 95.2% 70-130 Carbon Tetrachloride 8260B 06/28/18:209698VRG CCV ug/L 25.00 95.4% 70-130 Chlorobenzene 8260B 06/28/18:209698VRG CCV ug/L 25.00 115% 70-130 Chloroethane(Ethyl Chloride) 8260B 06/28/18:209698VRG CCV ug/L 25.00 110% 70-130 Chloroform 8260B 06/28/18:209698VRG CCV ug/L 25.00 103% 80-120 Chloromethane(Methyl Chloride) 8260B 06/28/18:209698VRG CCV ug/L 25.00 127% 70-130 cis-1,2-Dichloroethylene 8260B 06/28/18:209698VRG CCV ug/L 25.00 82.3% 70-130 DBCP 8260B 06/28/18:209698VRG CCV ug/L 25.00 257% 70-130 360 Dibromochloromethane 8260B 06/28/18:209698VRG CCV ug/L 25.00 94.1% 70-130 Dibromofluromethane 8260B 06/28/18:209698VRG CCV ug/L 25.00 82.3% 70-130 Dibromomethane 8260B 06/28/18:209698VRG CCV ug/L 25.00 125% 70-130 Dichlorodifluoromethane 8260B 06/28/18:209698VRG CCV ug/L 25.00 130% 70-130 Dichloromethane 8260B 06/28/18:209698VRG CCV ug/L 25.00 85.6% 70-130 Ethyl tert-Butyl Ether 8260B 06/28/18:209698VRG CCV ug/L 25.00 104% 50-150 j Ethylbenzene 8260B 06/28/18:209698VRG CCV ug/L 25.00 102% 80-120 Hexachlorobutadiene 8260B 06/28/18:209698VRG CCV ug/L 25.00 158% 70-130 360 Isopropyl Ether 8260B 06/28/18:209698VRG CCV ug/L 25.00 107% 50-150 Isopropylbenzene 8260B 06/28/18:209698VRG CCV ug/L 25.00 109% 70-130 Methyl tert-Butyl Ether 8260B 06/28/18:209698VRG CCV ug/L 25.00 90.2% 70-130 Naphthalene 8260B 06/28/18:209698VRG CCV ug/L 25.00 374% 70-130 360 n-Butylbenzene 8260B 06/28/18:209698VRG CCV ug/L 25.00 93.3% 70-130 n-Propylbenzene 8260B 06/28/18:209698VRG CCV ug/L 25.00 113% 70-130 p-Isopropyltoluene 8260B 06/28/18:209698VRG CCV ug/L 25.00 102% 70-130 sec-Butylbenzene 8260B 06/28/18:209698VRG CCV ug/L 25.00 98.3% 70-130 Styrene 8260B 06/28/18:209698VRG CCV ug/L 25.00 111% 70-130 Amended Page 11 of 12 August 15, 2018 Lab ID : SP 1808459 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Conc. QC Data DQO Note Organic TAME 8260B 06/28/18:209698VRG CCV ug/L 25.00 126% 50-150 tert-Butanol 8260B 06/28/18:209698VRG CCV ug/L 125.0115% 50-150 tert-Butylbenzene 8260B 06/28/18:209698VRG CCV ug/L ±-5766--- 114% 70-130 Tetrachloroethylene(PCE) 8260B 06/28/18:209698VRG CCV ug/L 25.00 132% 70-130 360 Toluene _ _ _ _ 8260B 06/28/18:209698VRG CCV ug/L 25.00 115% 80-120 Toluene-d8 8260B 06/28/18:209698VRG CCV ug/L 25.00 99.0% 70-130 trans-1,2-Dichloroethylene 8260B 06/28/18:209698VRG CCV ug/L 25.00 81.1% 70-130 Trichloroethylene(TCE) 8260B 06/28/18:209698VRG CCV ug/L 25.00. 108% 70-130 Trichlorofluoromethane F-11 8260B 06/28/18:209698VRG CCV ug/L 25.00 84.6% 70-130 Trichlorotrifluoroethane F-113 8260B 06/28/18:209698VRG CCV ug/L 25.00 79.8% 70-130 Vinyl Chloride 8260B 06/28/18:209698VRG CCV ug/L 25.00 113% 80-120 Xylene m,p 8260B 06/28/18:209698VRG CCV ug/L 50.00 107% 70-130 Xylenes o 8260B 06/28/18:209698VRG CCV ug/L 25.00 112% 70-130 Definition CCV :Continuing Calibration Verification-Analyzed to verify the instrument calibration is within criteria. Blank :Method Blank-Prepared to verify that the preparation process is not contributing contamination to the samples. LCS :Laboratory Control Standard/Sample-Prepared to verify that the preparation process is not affecting analyte recovery. MS :Matrix Spikes-A random sample is spiked with a known amount of analyte.The recoveries are an indication of how that sample matrix affects analyte recovery. MSD :Matrix Spike Duplicate of MS/MSD pair-A random sample duplicate is spiked with a known amount of analyted.The recoveries are an indication of how that sample matrix affects analyte recovery. MSRPD :MS/MSD Relative Percent Difference(RPD)-The MS relative percent difference is an indication of precision for the preparation and analysis. ND :Non-detect-Result was below the DQO listed for the analyte. DQO :Data Quality Objective-This is the criteria against which the quality control data is compared. Explanation 360 :CCV above Acceptance Range(AR).Samples which were non detect for this analyte were accepted. 435 :Sample matrix may be affecting this analyte.Data was accepted based on the LCS or CCV recovery. • Amended Page 12 of 12 CHAIN OF CUSTODY ISM 4 09 South Tahoe Public Utility District Lab Sent FGA Preservatives: Turn-Around-Time: 1275 Meadow Crest Drive •-• VOC-HCI Standard South Lake Tahoe,CA 96150 +:� Sampler(s): D.Trebotich Phone:(530)-543-6231 • •.. .w•`'; 0 W d , W Lab ID# Sample Site DCollection ate&Time c;, AG62050 DD-01 Diamond Ditch®Beginning Start of Diamond Ditch;at HPR 0612612018 09:23 . Ww x outlet AG62051 HPR Harvey Place Reservoir @ HPR Outlet 06/2612018 09:36 Ww X AG62052 BLANK TRIP Trip Blank 0612612018 00:00 X No - — Relinquished by: Received by: _VcReport MTBE to 0.2 ug/L ✓Analyze Travel amid_Sield Blanks only if VOCs detected in samples. Signature2L4 .Z4k _' Signature _Use Calif State WriteOn to report&upload results of Potable Water Wells. Print peore ti erre,100 OA Print Company South Tahoe Public Utility District Company Please Return all STPUD ice chests & Blue Ice Date: 06'210-16 Time: IAN) Date: Time: Comments: l . Relinquished by: ! Received by: TRK# 7725 8943 2825 Signature Signature Cil,_) ,.„..----------____.-, Print Print in--\-Y\k.C),-- v( -F L1 ' Company � ' � / Company _ Date: J Time:1..15L Date: Time:,`' Page 1 of 1 FGL Environmental Doc ID:2D0900157 SOP 17.DOC Revision Date: 10/09/14 Page: 1 of1 Condition Upon Receipt(Attach to COC) Sample Receipt at SP: 1.Number of ice chests/packages received: 1 2. Shipper tracking numbers 772569432825 3.Were samples received in a chilled condition? Temps: 4 / / / / / / 4.Surface water(SWTR)bact samples:A sample that has a temperature upon receipt of>10C,whether iced or not, -should be flagged unless the time since sample collection has been less than two hours. 5.Do the number of bottles received agree with the Yes No N/A COC? 6.Verify sample date,time,sampler Yes No N/A 7.Were the samples received intact?(i.e. no broken Yes No bottles, leaks,etc.) 8.Were sample custody seals intact? Yes No N/A Sample Verification, Labeling and Distribution: 1.Were all requested analyses understood and Yes No acceptable? 2.Did bottle labels correspond with the client's ID's? Yes No 3.Were all bottles requiring sample preservation Yes No N/A FGL properly preserved? [Exception:Oil&Grease,VOA and CrVI verified in lab] 4.VOAs checked for Headspace? Yes No N/A 5.Were all analyses within holding times at time of Yes No receipt?. 6.Have rush or project due dates been checked and Yes No N/A accepted? Include a copy of the COC for lab delivery.(Bacti. Inorganics and Radio) Sample Receipt, Login and Verification completed by: Reviewed and DigitallysignedbyCynthiaTCasa rez Cynthia T Casarez Title:Sample Receiving Approved By Date:06/27/2018-12:14:40 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 1808459 CTC-06/27/2018-12:14:40 TEST METHODS Laboratory Analyses The Regional Board allows the District laboratory to use an alternate test method for Total Nitrogen and Total Kjeldahl Nitrogen (TKN). The District uses test method 1-4650-03, developed by United States Geological Service (USGS), for Total Nitrogen. TKN is calculated by the subtraction of Nitrate-N and Nitrite-N from the Total Nitrogen result. The permit specifies that a performance evaluation (PE)test be done annually and the result is within an acceptable range. The report for this year's PE sample follows. Ver.1 Page 1 of 14 ERA A Waters Company Terry Powers South Tahoe Public Utilities District 1275 Meadow Crest Dr. South Lake Tahoe, CA 96150 USA WP-276 Final Report TM WatRTM Pollution Proficiency Testing WatRTM Pollution Study Open Date: 01/75/78 Close Date: 03/01/18 Report Issued Date: 03/05/18 Ver.1 Page 2 of 14 (t) ERA A Waters Company March 5, 2018 Terry Powers South Tahoe Public Utilities District 1275 Meadow Crest Dr. • South Lake Tahoe, CA 96150 • Enclosed is your final report for ERA's WP-276 WatRTMPollution 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-276 WatRTM Pollution Proficiency Testing study have been evaluated using the following tiered approach. If the analyte is listed in the current TNI Fields of Proficiency Testing (FoPT)tables,the evaluation was completed by comparing the reported result to the acceptance limits generated using the criteria contained in the current TNI FoPT tables. If the analyte is not included in the TNI FoPT tables,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. At the request of the TNI Accreditation Council,we have included a Laboratory Exception Report that includes a list of all analytes reported with less than qualifiers when the assigned value was greater than "0." In addition, because we have received many requests from laboratories, this report also includes a list of all analytes with "Not Acceptable" evaluations. Some states have elected not to convert to the 2009 TNI Standards at this time. If you have released your results to a state that has retained the 2003 NELAC Evaluation Criteria,your final report will include a section that evaluates the results according to the 2003 Standard in addition to the 2009 TNI Standards. Thank you for your participation in ERA's WP-276 WatRTM Pollution Proficiency Testing study. If you have any questions, please contact our Proficiency Testing Department at 1-800-372-0122. Sincerely, 6.Matthew Seebeck • Quality Officer attachments • 16341 Table Mountain Pkwy•Golden,CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eraqc.com Study#:WP-276 i Ver.1 Page 3 of 14 Cit) ERA A Waters Company Report Recipient Contact/Phone Number Reporting Type Evaluation Type California ELAP Christine Sotelo/916-341-5175 All Analytes 2009 TNI Study#:WP-276 Ver.1 Page 4 of 14 CERA A Waters Company WP-276 Definitions & Study Discussion Study Dates: 01/15/18-03/01/18 Report Issued: 03/05/18 WP Study Definitions WP Study Discussion The Reported Value is the value that the laboratory reported ERA's WP-276 WatRTMPollution Proficiency Testing study to ERA. has been reviewed by ERA senior management and certified compliant with the requirements of the 2009 TNI PT Standard The ERA Assigned Values are compliant with the most and the criteria contained in the most current TNI Fields of current TNI Fields of Proficiency Testing(FoPT)tables. A Proficiency Testing(FoPT)tables. parameter not added to the standard is given an Assigned Value of"<PTRL"per the guidelines contained in the 2009 ERA's WP-276 WatRTMPollution study standards were TNI Standards. The assigned values are directly traceable to examined for any anomalies. A full review of all homogeneity, the commercially prepared starting materials used to stability and accuracy verification data was completed. All manufacture the PT standards. analytical verification data for all analytes met the acceptance criteria contained in the 2009 TNI PT Standard and the The Acceptance Limits are established per the criteria criteria contained in the most current TNI FoPT tables. contained in the most current USEPA/NELAC FoPT tables,or ERA's SOP for the Generation of Performance Acceptance The data submitted by participating laboratories was also Limits TM as applicable. examined for study anomalies. There were no anomalies observed during the statistical review of the data. The Performance Evaluation: ERA's WP-276 WatRT""Pollution study reports shall not be reproduced except in their entirety and not without the permission of the participating laboratories. The report must Acceptable = Reported Value falls within the not be used by the participating laboratories to claim product Acceptance Limits. endorsement by any agency of the U.S.government. The data contained herein are confidential and intended for Not Acceptable = Reported Value falls outside the your use only. Acceptance Limits. If you have any questions or concerns regarding your assessment in ERA's WatRT"'Pollution Proficiency Testing No Evaluation = Reported Value cannot be evaluated. program, please contact our Proficiency Testing Department at 1-800-372-0122. Not Reported = No Value reported. The Method Description is the method the laboratory reported to ERA. Study#:WP-276 ACCREDITED .:arxrc.er..cG;vv z Ver.1 Page 5 of 14 ERA WP-276 LaboratoryException A Waters Company Terry Powers EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District Report Issued: 03/05/18 1275 Meadow Crest Dr. Study Dates: 01/15/18-03/01/18 South Lake Tahoe,CA 96150 530-543-6231 2009 TNI Evaluation Checks There are no values reported with<where the assigned value was greater than 0. 2009 TNI Not Acceptable Evaluations TNI Analyte Analyte Units Reported Value Assigned Value Acceptance Limits Performance Evaluation Method Description Code WP Dissolved Oxygen(cat#212,lot#P276-213) 1880 Oxygen,;Dissolved ; ; ; mg/L ; .13.31 . ; 16.9 • . 13.8 20.0. ' • ; Not Acceptable ; SM 4500-0 G-2001 2001. WP WasteWatRTM Coliform MicrobETM(cat#576,lot#P276-083) 2500 Total Coliforms(MPN) MPN/100mL 54.7 276 133-485 Not Acceptable SM 9223 B(Colisure®Quanti-Tray®)- 1997 1997 2525 E.coli(MPN) . MPN/100mL 54.7. 276. .130-488 .- Not Acceptable , SM 9223 B(Colisure®Quanti-Tray®)- 1997 1997 . auruc Itwaxno -44 All analytes except PT catalog numbers 462,604QR,929,731 QR,960,735QR(PFAS)are included in ERA's A2LA accreditation.Lab Code:1539-01 �' 16341 Table Mountain Pkwy•Golden, CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eraqc.com Stud #:WP-276 (S) L- ACCRHDITED � Y Ver.1 Page 6 of 14 0 ERAi A Waters Company Final Report Results For Laboratory South Tahoe Public Utilities District 11±7.L' 16341 Table Mountain Pkwy•Golden, CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eraqc.com Stud #:WP-276 ACCREDITED Ver.1 • Page 7 of 14 • ERA A Waters Company 2009 TNI Evaluation Report Study: WP-276 ERA Customer Number: S586001 Laboratory Name: South Tahoe Public Utilities District Inorganic Results � 16341 Table Mountain Pkwy•Golden,CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eragc.com Study#:WP-276 Ver.1 Page 8 of 14 0 ERA WP-276 2009 TNI Evaluation Final Complete Report A Waters Company Lab Powers EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District Report Issued: 03/05/18 1275 Meadow Crest Dr, Study Dates: 01/15/18-03/01/18 South Lake Tahoe,CA 96150 530-543-6231 TNI Reported Assigned Acceptance Performance Analysis Study Study Analyte Analyte Units Method Description Code Value Value Limits Evaluation Date Mean Deviation WP Minerals(cat#581,lot#P276-506) . 1505 . Alkalinity as.CaCO3 • ,. • mg/L -80.1' • 80.2 • 68.2-92.2 • Acceptable . sM2320B-19971997 . 1/30/2018 , •0.488; • ' 78.6 . 3.06* ,Phyllis Kunibe.' 1575 Chloride mg/L 39.2 40.3 34.7-46.0 Acceptable EPA 300.0 2.1 1993 1/30/2018 0.00749 39.2 1.64 Brian Chernago 1610 Conductivity at 25°C • • : • . timhos/Crit 390 , ,383 . -345-421 ' Acceptable. • SM 2510 B-1997,1997 1/30/2018 0.629 384 `.9:15 : Phyllis Kunibe - 1730 Fluoride mg/L 0.691 0.636 0.460-0.812 Acceptable EPA 300.0 2.1 1993 1/30/2018 1.64 0.609 0.0500 Brian Chernago 1125 Potassium. ` mg/L'` • , 34.5 27.6-41.4 .Not Reported ', • ' . . • , ' •.33.8 , 1:86 ' ' .' , 1155 Sodium mg/L 63.2 50.6-75.8 Not Reported 60.9 3.07 2000 . Sulfate ,_ • .. ,• • • mg/L 40.2 ,.' 40.8 33.3.-46.9 . Acceptable.,. EPA 300.0 2.1,1993..... 1/30/2018. 0.279 39.7 ' 1.7.4 .Brian Chernago 1955 Total Dissolved Solids at 180°C . mg/L 310 318 273-363 Acceptable SM 2540 C-1997 1997 1/31/2018 0.621 302 12.9 Phyllis Kunibe 1950 Total Solids at 105°C' ._ • . mg/L 331 286-376 Not Reported: •. •. 319 11.7 ' • WP Hardness(cat#580,lot#P276-507) 1960 Total Suspended Solids mg/L• 90.7 74.7-101 Not Reported • .. ' .85.9•. 3.45 • •. 1035 . Calcium mg/L 28.2 28.2 24.0-32.4 Acceptable SM 3500-Ca B-1997 1997 2/2/2018 0.574 27.4 1.37 Phyllis Kunibe 1085• Magnesium .. . . ' ' ' mg/L 14.6 - 12:4-16.8 •Not Reported. :14.3 . ',.0.735 ,‘•. .. . 1550 Calcium Hardness as CaCO3 mg/L 70.4 - 70.3 59.8-80.8 Acceptable SM 3500-Ca B-1997 1997 2/2/2018 0.656 68.3 3.20 Phyllis Kunibe 1755 Total Hardness as.CaCO3 , .i ; mg/L ' • .122 ; ' ,.1.30; ,;110-150 :Acceptable. ; SM 2340 B-1997 1997 '1/31/2018 •:-0:919 : - • .127, ' : 5.28; Phyllis Kunibe WP pH(cat#577,lot#P276-977) • 1900' pH` • • 'S.U. 6.91 •6.89 . 6.69=7.09-' ' Acceptable SM4500-H+B-19961996, 1/31/2018. ',L0.388 6.93 ' 0:0482. Phyllis Kunibe WP pH(cat#577,lot#P276-977) . 1900. pH. • • _ S.U. ; 6.91 6.89' • 6.69-7.09 Acceptable . SM4500-H+B-1996.1996. 1/31/2018 =0.388' 6,.93 0:0482 Phyllis Kunibe• _ WP pH(cat#577,lot#P276-977) 1900 pH . S.U.- 6.94 •' 6.89' 6:69 7.09 Acceptable- "SM 4500-H+B-19961996. 1/31/2018 ''0.234' ,,6.93 0.0482 Phyllis Kunibe '' '' All analytes except PT catalog numbers 462,604QR,929,731 QR,960,735QR(PFAS)are included in ERA's A2LA accreditation.Lab Code:1539-01 Ail 16341 Table Mountain Pkwy•Golden,CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eragc.corn Study#:WP-276 (14S) Ver.1 Page 9 of 14 0 ERA WP-276 2009 TNI Evaluation Final Complete Report A Waters Company Terry Powers EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District Report Issued: 03/05/18 1275 Meadow Crest Dr. Study Dates: 01/15/18-03/01/18 South Lake Tahoe,CA 96150 530-543-6231 TNI Reported Assigned Acceptance Performance Analye StudyStudy Analyte Analyte Units Value Value Limits Evaluation Method Description Date Z Score Mean Standard Analyst Name Code Deviation WP pH(cat#577,lot#P276-977) 1900 , pH .'•' • : .'. - . • • • . ,• . •'.S:U., •• • , •7.04- '6.89' • 6.69 7.09. : . ,Acceptable, SM 4500-H+•B-19961996 ;1/31/2018. 2:31. • ; 6.93• ; ,'0•.0482 . . Phyllis,Kunibe, WP pH(cat#577,lot#P276-977) •.1900,', pH •• '• . •• S.U. - •• 6.93.• •6:89 ' ,6.69-7.09• `, Acceptable; 'SM 4500-H+•B=19961'996 1/•31/2.01'8• ,0:0268 ' ' 6.93. . . 0:0482•• . , Phyllis.,Kunibe • WP Settleable Solids(cat#883,lot#P276-911) ,1965. .Settleable Solids • . . •. , . , , ,•mL/L;• 10.0. 10.0, . .7:27-.13.6• Acceptable SM.2540.F-1997.1997• ,1/31/201'8' . ..-0.819 • • ,.1.0,..8' • ,'0:946 . . Phyllis Kunibe, • WP Solids Concentrate(cat#4030,lot#P276-4032) 1960, Total Suspended Solids' ••• ,,. . • , mg/L ' • , , .73.6' • . ,• , 74:4 • 69:a-83.2•• • .Acceptable •sM 2546;13-1997 1997. 1/25/2618 :.0.678• • 71.9•• . .2:50 ' . . '• ' 1955 Total Dissolved Solids at 180°C mg/L 700 708 637-779 Acceptable SM 2540 B-1997 1997 1/25/2018 1.05 675 23.8 1950 , Total Solids-at*,105°C .' , ', • . ,mg/L, .' , ... -774 • • 769, •- • .692'-846 • Acceptable . . .' Calculation..,'• 1/25/2018• ,0.848• .• _7754 :240 ,'• : - . • ,• WP Simple Nutrients(cat#584,lot#P276-505) ,1515.. Ammonia•as N . • • . • . • • , mg/L ' ' * •. ., :15.9 12:8-18.9• .Not Reported . '• , : -. , •• ', 15.9' 0'.930 : . • ; 1820 Nitrate+Nitrite as N mg/L 7.54 6.24-8.78 Not Reported 7.52 0.389 .'1810. Nitrate as N. , •.. .. •.. • . , ; • . „ mg/L;'' ' 7.95' ;-'7.54 ' 6.18-8.86 . Acceptable •. , •EPA 300.0 2:1.1993. ' 1/30/2018 ;1'.11 ': •7:52 • 0.387 ' -Brian Chernago 1870 ortho-Phosphate as P mg/L 3.55 3.22 2.74-3.70 Acceptable EPA 300.0 2.1 1993 1/30/2018 2.26 3.20 0.155 Brian Chernago WP Simple Nutrients(cat#584,lot#P276-505) 1515• Ammonia as N. . •' •. . ' , ' mg/L• • , . ,14.2. . ' .1.5.9 •12.8,-'18:9 . Acceptable• EPA 350..1,2 1993, '2/13/2018 .1..80• ,'15:9 ." ' 0.930• • .Dan Arce' .- •. . 1820 Nitrate+Nitrite as N mg/L 7.49 7.54 6.24-8.78 Acceptable SM 4500-NO3 F-1997 1997 2/10/2018 -0.0849 7.52 0.389 Delores Trebotich SM 4500-NO3Fminus SM •1810' • Nitrate as N• .. . ' •.. , '' • .. , • , •.mg/L• ' • - . 7'.49 • 7.54... ' 6.18=.8.86-, Acceptable • 45oallo2 B(caicj-97, 2'/10/2018, -0:0,771. , , .7.52, ' • 0.387•, Delores Trebotich. 1870 ortho-Phosphate as P mg/L 3.16 3.22 2.74-3.70 Acceptable SM 4500-P E-1997 1997 1/30/2018 -0.256 3.20 0.155 Brian Chernago '''''''''7:::`,,, All analytes except PT catalog numbers 462,604QR,929,731 QR,960,735QR(PFAS)are included in ERA's A2LA accreditation.Lab Code: 1539-01 `kik-' 16341 Table Mountain Pkwy•Golden, CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eragc.com Study#:WP-276 (5) ACCREDITED Ver.1 Page 10 of 14 ERA WP-276 2009 TNI -Evaluation Final Complete Report A Waters Company Terry Powers EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District Report Issued: 03/05/18 1275 Meadow Crest Dr. Study Dates: 01/15/18-03/01/18 South Lake Tahoe,CA 96150 530-543-6231 TNI Reported Assigned Acceptance Performance Analysis Study Study Analyte Analyte Units Value Value Limits Evaluation Method Description Date Z Score Mean Standard Analyst Name Code Deviation (WP Complex Nutrients(cat#579,lot#P276-525) 1795 Total Kjeldahl Nitro9en •". mg/L '16.5 . 12:3-20:2• • N'ot Reported. •' = • 16:5 • 1.06 •• • 1 1910 -Total phosphorus as P mg/L 7.12 7.33 6.10-8.48 Acceptable SM 4500-P E-1997 1997 1/31/2018 -0.531 7.34 0.410 Phyllis Kunibe -WP Nitrite(cat#888,lot#P276-770) 1840 Nitrite as N • • mg/L 2:63. 2:66 2.29=3.04 Acceptable = ,EPA 300.0 2:1 1993 1/30/201'8, '-0.0917 •12.64; 0.158 .. - Brian Chernago WP Nitrite(cat#888,lot#P276-770) 1840 Nitrite as N:• ; ; mg/L 2:50 . • -2.66 ; 2,29•-7 3.04 ; Acceptable SM 4500-1409 F-2000.2000 • 1/30/2018; 0.914 2.64. ' 0.158 'Delores Trebotich WP Nitrite(cat#888,lot#P276-770) 1840 Nitrite as N = mg/L • 2.69 2.66 2.29-3:04. ..Acceptable' SM4500=1402.s-2000.20.00' 1/30/2018, 0.288 . 2:64. ; 0:158 Brian:Chernago .. WP Demand(cat#578,lot#P276-516) 1530 BOD mg/L 112 96;8'. 51.9-142 Acceptable •.SM 5210 0-199:1997 2/6/2018 .1.14; 94.8 151 PK/DA' 1555 CBOD mg/L 87.6 40.6-135 Not Reported 89.2 17.1 1565 COD mg/L. . . 157. 125=184 .Not Reported .154 • 13:3 2040 TOC mg/L 62.1 51.9-71.7 Not Reported 61.8 2.68 WP Dissolved Oxygen(cat#212,lot#P276-213) 1880. Oxygen,'Dissolved .mg/L 16.91 16..9 13.8.20.0" Acceptable ski 4500-o c-20012001. /2/2/2018 0.0303:. 16:9 . '1:04 •. Phyllis Kunibe WP Dissolved Oxygen(cat#212,lot#P276-213) 1880Oxygen,Dissoved mg/L 15.29 • 16.9 13.8-2 .0 �Acceptaile sM45oo-0'0-20012001 2/2/2018 •16.9 1:04. • Phyllis Kunibe. WP Dissolved Oxygen(cat#212,lot#P276-213) 1880 Oxygen;Dissolved • . ,mg/L 13.31 16.9.. 1:3.8:20.0' Not Acceptable SM 4500,0,0-2001 2001 2/2/201.8 ' -3.44. 16.9 ,1.04 .•• • Phyllis Kunibe WP Dissolved Oxygen(cat#212,lot#P276-213) 1880 Oxygen,:Dissolved •• mg/L ; 13.91 • 16.9 13:8 20:0 'Acceptable •sM 4506-6:0-2001 c)c)1 2/2/2018; -2.86 16:9 1.04 Phyllis Kunibe All analytes except PT catalog numbers 462,604QR,929,731 QR,960,735QR(PFAS)are included in ERA's A2LA accreditation.Lab Code:1539-01 16341 Table Mountain Pkwy•Golden, CO 80403•800.372.0122 •303.431.8454•fax 303.421.0159•www.eragc.corn Study#:WP-276 (5) ACCREDITED YIiM 4'S:ry wv.. hR.:a 11 u, .ti • Ver.1 Page 11 of 14 0 ERA WP-276 2009 TNI Evaluation Final Complete Report • A Waters Company Terry Powers EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District Report Issued: 03/05/18 1275 Meadow Crest Dr. Study Dates: 01/15/18-03/01/18 South Lake Tahoe,CA 96150 530-543-6231 TNI Reported Assigned Acceptance Performance Analysis Study Study Analyte Analyte Units Value Value Limits Evaluation Method Description Date Z Score Mean Standard Analyst Name Code Deviation - WP Dissolved Oxygen(cat#212,lot#P276-213) . 1880 Oxygen:Dissolved • mg/L 1,6:24, .16.9 13.8-20.0'.. Acceptable sM 4500.0 6-20012001 2/8/2018 =0:615 16.9: 1.04 Brian'Cherriago WP Turbidity(cat#893,lot#P276-777) - 2055 Turbidity - NTU 8:70 • 8;'72. '7.00=10.4, .Acceptable' EPA 180'.1 2 1993: 1/31./201"8 0.383'' 8.50 • :,0.515'.' Phyllis l<unibe ; WP Turbidity(cat#893,lot#P276-777) 2055' •Turbidity NTU ,8:84 .' 8:72,.• , 7:00-'10.4 "Acceptable EPA 180.1 2199 . 1/31•/2018 0:655' 8:50 0.:5.15 • Phyllis Kunibe• WP Turbidity(cat#893,lot#P276-777) 2055T.urbidit •, NTU • 8.54, '' :8:72 7.00"10.4. Acce'P table EPA'180.1'2 1993 •1/31'/2018 0:0724,- . 8'.50 • 0.5'15 Kunibe • Y PhyllisY WP Total Residual Chlorine(cat#587,lot#P276-501) V 1940 ' Total Residual Chlorine m /L 1.96• 2.07. 1.52=2:42. :Acce'�table SM 4500=Ci c-2000:2000, . 1/25/2018. -0. 17 :•. � .12� Delores'Trebotich • -• . 9. . - ,p � � 3 2:00 ... 0 .3 -._ WP Total Residual Chlorine(cat#587,lot#P276-501) 1940' .Total Residual Chlorine ' mg/L . 1.99 2.07' 1.52.=2:42 . Acceptable. SM 4500-CI G;1903.1993 :1/25/2018, =0:0733 2:00. 0.123, 'Delores Trebotich WP Total Residual Chlorine(cat#587,lot#P276-501) 1940 Total Residual 6h1011ne. Img/L' .2.03. 2.07' -2.42 Acceptable SM,4500-ci.G-1.9931993 1/25/2018. 0:252-' ,2.00 ;0:1,23.-. Delores Trebotich-. All analytes except PT catalog numbers 462,604QR,929,731 QR,960,735QR(PFAS)are included in ERA's A2LA accreditation.Lab Code:1539-01 16341 Table Mountain Pkwy•Golden,CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eragc.corn Study#:WP-276 feS) ACCREDITED ucarsn w..tai:, Ver.1 Page 12 of 14 0 ERA A Waters Company 200.9 TNI Evaluation Report Study: WP-276 ERA Customer Number: S586001 Laboratory Name: South Tahoe Public Utilities District Microbiology Results .0/1.17040 2314� 16341 Table Mountain Pkwy•Golden,CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eragc.com Study#:WP-276 Ver.1 Page 13 of 14 Ci) ERA _ WP-276 •2009 TNI Evaluation Final Complete Report A Waters Company Terry Powers EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District Report Issued: 03/05/18 1275 Meadow Crest Dr. Study Dates: 01/15/18-03/01/18 South Lake Tahoe,CA 96150 530-543-6231 TNI Reported Assigned Acceptance Performance Analysis Study Study . Analyte Analyte _Units Method Description Z Score Standard Analyst Name Code Value Value Limits Evaluation Date Mean Deviation WP WasteWatRTM Coliform MicrobETM(cat#576,lot#P276-083) 2500 • Total Coliforms(MF.)• , ,„• . • CFU/100mL ••236 68:0•-.723 • . N'ot Reported. • • - . • • . • .221'• , • 109. • . - - • • 2530 Fecal Coliforms(MF) CFU/100mL 236 51.0-424 Not Reported 146 62.2 :2525' E.coli(MF). • . , .. . .• . • • CFU/100mL. ' • • . . • 236 52:0-420 ,Not Reported . •• •. 1 '. • • 148• , '61.4 •. ; • .. 2500 Total Coliforms(MPN) MPN/100mL 290.9 276 133-485- Acceptable Colllerta Quanta-Tray® 1/24/2018 0.0335 254 58.8 DA/PK 2530. Fecal Coliforms(MPN)• , • • , . MPN/1.00mL., . , 276 109-364 .Not Reported • • . ,• • ' • • ' •'• • 200 42.4 • • ' . . 2525 E.coli(MPN) MPN/100mL 290.9 276 130-488 Acceptable SM 9223 B Tray)-200412004ert uanti- 1/24/2018 0.0354 252 59.7 DA/PK Per Section 6.4.3 a of the 2009 TNI Standard,"The assigned values for quantitative microbiology analytes shall be equal to the mean of the assigned value verification and/or homogeneity testing per Sections 7.1 and 7.2". The final acceptance limits are derived from the calculated study mean and study standard deviation from laboratory-reported results. Disagreement between the assigned values and study means/acceptance limits are du_a to the inherent variability of microbiology methods and differences in the methods used by ERA and participant laboratories. For quantitative microbiology analytes,the assigned value is not used in the evaluation of laboratories. WP WasteWatRTM Coliform MicrobETM(cat#576,lot#P276-083) ,- 2500 Total'Coliforms.(MF) .. . • . ' • 'CFU/100mL' 236 . •68.0 723 Not Reported • •. 1 • • . 1 .' ., • • . • ' • •. • ' 221' 109 . • .• •, • . 2530 Fecal Coliforms(MF) CFU/100mL 236 51.0-424 Not Reported 146 62.2 2525 E.coli(MF) ;••• • •_• ,' • : CFU/100mL. : 236 , 52.0.420 Not Reported • ' : ., 148 - - :61.4 . • . . 2500 Total Coliforms(MPN) MPN/100mL 54.7 276' 133-485 Not Acceptable sM 9223 B(Collsure®Quantl- 1/24/2018 -0.377 254 58.8 DA/PK _ p Tray®)-19971997 • 2530 Fecal Coliforms'(MPN). • MPN/1.00mL . 276 . • 1.09-.364 Not Reported .• • . ' • • • • . 200 • , .:42.4. • .• • - 2525 E.coli(MPN) MPN/100mL 54.7 276 130-488 Not Acceptable sM 9223 B(Colisure®c]uanti- 1/24/2018 -0.373 252 59.7 DA/PK Tray®)-1997 1997 Per Section 6.4.3 a of the 2009 TNI Standard,"The assigned values for quantitative microbiology analytes shall be equal to the mean of the assigned value verification and/or homogeneity testing per Sections 7.1 and 7.2". The final acceptance limits_are derived from the calculated study mean and study standard deviation from laboratory-reported results. Disagreement between the assigned values and study means/acceptance limits are due to the inherent variability of microbiology methods and differences in the methods used by ERA and participant laboratories. For quantitative microbiology analytes,the assigned value is not used in the evaluation of laboratories. "'"'°`W"° All analytes except PT catalog numbers 462,604QR,929,731 QR,960,735QR(PFAS)are included in ERA's A2LA accreditation.Lab Code:1539-01 kW! 16341 Table Mountain Pkwy•Golden, CO 80403•800.372.0122•303.431.8454•fax 303.421.0159 •www.eragc.corn Stud #:WP-276 (5) CCR AEDITED Y Ver.1 Page 14 of 14 CERTIFICATE OF RECOGNITION ERA congratulates South Tahoe Public Utilities District WP-276 For your participation and successful evaluation, we recognize the performance of this laboratory for achieving acceptable evaluation in the following standards. Complex Nutrients Demand Hardness Minerals Nitrite pH Settleable Solids Simple Nutrients Solids Concentrate Total Residual Chlorine Turbidity "71j' Matthew Seebeck ssssooi Quality Officer Ver.2 Page 1 of 7 EliAA A Waters Company Terry Powers South Tahoe Public Utilities District 1275 Meadow Crest Dr. South Lake Tahoe, CA 96150 USA 0328181_ a Final TM QuiKTM Res Proficiencyponse Testing Project#:032818L Ver.2 Page2of7 ERA A Waters Company April 20,2018 Terry Powers South Tahoe Public Utilities District 1275 Meadow Crest Dr. South Lake Tahoe, CA 96150 Fax: 530-541-4296 Enclosed is your final report for ERA's QuiKTM Response program. Your final report includes an evaluation of all results submitted by your laboratory to ERA. None of the assigned value(s)or acceptance limits were available to your laboratory at or before the time of reporting. Please note the following changes to our final, reports: • At the request of the TNI Accreditation Council,we have included a Laboratory Exception Report that includes a list of all analytes reported with less than qualifiers when the assigned value was greater than "0." In addition, because we have received many requests from laboratories,this report also includes a list of all analytes with "Not Acceptable" evaluations. • Some states have elected not to convert to the 2009 TNI Standards at this time. If you have released your results to a state that has retained the 2003 NELAC Evaluation Criteria,your final report will include a section that evaluates the results according to the 2003 Standard in addition to the 2009 TNI Standards. 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 the quality of your routine data. The data contained herein are confidential and intended for your use only. If you are using this report for Corrective Action, please note the following: permittees must submit a copy of this report to your DMR-QA Coordinator, along with your corrective action documentation. Contract Laboratories should send a copy of this report to your permittees upon receipt. Thank you for your participation in ERA's QuiKTM Response program. If you have any questions, please contact our Proficiency Testing Department at 1-800-372-0122. Sincerely, Matthew Seebeck Quality Officer /cc: Project File Number 032818L 16341 Table Mountain Pkwy•Golden,CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eragc.com Project#:032818L Ver.2 Page3of7 ( ERA A Waters Company Report Recipient Contact/Phone Number Reporting Type Evaluation Type California ELAP Christine Sotelo/916-341-5175 All Analytes 2009 TNI Project#:032818L Ver.2 Page 4 of 7 4) ERA 032818L LaboratoryException A Waters Company Terry Powers EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District 1275 Meadow Crest Dr. South Lake Tahoe,CA 96150 530-543-6231 2009 TNI Evaluation Checks There are no values reported with<where the assigned value was greater than 0. 2009 TNI Not Acceptable Evaluations There were no Not Acceptable evaluations for this study. • uorc,+:wn,a All analytes except PT catalog numbers 462,604QR,929,731 QR,960,735QR(PFAS)are included in ERA's A2LA accreditation.Lab Code:1539-01 ;IL " - 16341 Table Mountain Pkwy•Golden,CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eragc.corn Project#:032818L EDITED Ver.2 Page5of7 0 ERA A Waters Company Final RepOrt Results For Laboratory • South Tahoe Public Utilities District '.1JlXC:7i q.:710 Oak 16341 Table Mountain Pkwy•Golden,CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eragc.comPro'ect#:032818E • • � ACCREDITEQ Ver.2 Page 6 of 7 ERA A Waters Company 2009 TNI Evaluation Report Project Number: 032818L ERA Customer Number: S586001 Laboratory Name: South Tahoe Public Utilities District . • . _ • , . inorganic -Results . . . _ 16341 Table Mountain Pkwy•Golden, CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.era c.com Project# 032818L ACCREDITED Ver.2 Page 7 of 7 ERA032818L 2009 TNI Evaluation Final Complete Report A Waters Company Terry Powers EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District 1275 Meadow Crest Dr. South Lake Tahoe,CA 96150 530-543-6231 TNI Reported Assigned Acceptance Performance Z Score Analysis Study Study Analyte Analyte Units Value Value Limits Evaluation Method Description Date Mean Standard Analyst Name Code Deviation WP Complex Nutrients(cat#525,lot#032818L)Study Dates:03/28/18-04/20/18 .1795 . Total Kjeldahl Nitrogeri • mg/L 21.8' '22.0 16:5 26:6' Acceptable ,' USGS 03-4174• 4/6/201'8' 0.609. 21.5 . 0.448 Dan Arce 1910 Total phosphorus as P mg/L 2.18 1.77-2.58 Not Reported 2.16 0.0871 • All analytes except PT catalog numbers 462,604QR,929,731 QR,960,735QR(PFAS)are included in ERA's A2LA accreditation.Lab Code: 1539-01 16341 Table Mountain Pkwy•Golden, CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eragc.com Project#:032818L • ACCREDITEp r.-ara)i M.SI.Ci