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May 5, 2021 Lab ID : STK2135171 <br /> San Joaquin Co. Environmental Health Dep Customer : 3-17919 <br /> Quality Control - Inorganic <br /> Constituent Method Date/ID Type Units Conc. QC Data DQO Note <br /> Metals <br /> Sodium 200.7 04/19/21:205711 AC CCB Ppm 0.10 1 <br /> inc 200.7 MS ug/L, 800.0 110% 75-125 <br /> (STK2135169-001) MSD ug/L 800.0 90.2% 75-125 <br /> MSRPD I u L 800.0 19.5% _<20.0 <br /> 200.7 04/19/21:205711 AC CCV ppm 1.000 102% 90-110 <br /> CCB ppm -0.0006 0.02 <br /> CCV ppm 1.000 106% 90-110 <br /> CCB PPM -0.0004 0.02 <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (CH 2172477-001) Dup mg/L 0.3% 10 <br /> 23206 04/25/21:206086AMM CCV mg/L 235.8 97.1% 90-110 <br /> CCV mg/L 235.8 91.5% 90-110 <br /> Bicarbonate 23208 (CH 2172477-001) Dup mg/L 0.3% 10 <br /> Carbonate 2320B (CH 2172477-001) Dup mg/L 0.0 10 <br /> Hydroxide 2320B (CH 2172477-001) Dup m 0.0 10 <br /> Conductivity 2510B 04/20/21:205710STA ICB umbos/cm 0.07 1 <br /> ICV umhos/cm 1000 104% 95-105 <br /> CCV umhos/cm 1000 102% 95-105 <br /> E.C. 2510B 04/20/21:204225sta Blank umhos/cm ND <1 <br /> (CC 2181169-001) Du umhos/cm 0.2% 5 <br /> Total Dissolved Solids(TFR) 2540CE 04/19/21:204194CTL Blank mg/L ND <20 <br /> LCS mg/L 995.0 101% 90-110 <br /> (SP 2105106-001) Dup mg/L 0.9% 5 <br /> (SP 2 105 106-00 1) Dup mg/L 3.5% 5 <br /> Chloride 300.0 04/16/21:204132MCA Blank mg/L ND <1 <br /> LCS mg/L 25.00 103% 90-110 <br /> MS mg/L 50.00 97.5% 85-121 <br /> (STK2135171-001) MSD mg/L 50.00 98.8% 85-121 <br /> MSRPD mg/L 10.00 0.9% <_19 <br /> MS mg/L 50.00 100% 85-121 <br /> (VI 2142834-001) MSD mg/L 50.00 104% 85-121 <br /> MSRPD I m 10.00 2.9% <19 <br /> 300.0 04/16/21:205853MCA ICB mg/L 0.00 1 <br /> ICV mg/L 25.00 103% 90-110 <br /> CCB mg/L 0.09 1 <br /> CCV m 25.00 103% 90-110 <br /> Fluoride 300.0 04/16/21:204132MCA Blank mg/L ND <0.I <br /> LCS mg/L 2.500 104% 90-110 <br /> MS mg/L 5.000 104% 87-120 <br /> (STK2135171-001) MSD mg/L 5.000 105% 87-120 <br /> MSRPD mg/L 10.00 1.3% <16 <br /> MS mg/L 5.000 103% 87-120 <br /> (VI 2142834-001) MSD mg/L 5.000 106% 87-120 <br /> MSRPD m 10.00 2.9% <16 <br /> 300.0 04/16/21:205853MCA ICB mg/L 0.000 0.1 <br /> ICV mg/L 2.500 104% 90-110 <br /> CCB mg/L 0.000 0.1 <br /> CCV m 2.500 104% 90-110 <br /> Nitrate 300.0 04/16/21:204132MCA Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 103% 90-110 <br /> MS mg/L 40.00 104% 85-119 <br /> (STK2135171-001) MSD mg/L 40.00 105% 85-119 <br /> MSRPD mg/L 10.00 1.2% <19 <br /> MS I m 40.00 1 85.6% 1 85-119 <br /> Page 7 of 9 <br />