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August 25, 2021 Lab ID : STK2151151 <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 08/06/21:212136AC CCB PPM 0.08 1 <br /> Zinc 200.7 MS ug/L 800.0 111% 75-125 <br /> (STK2151149-001) MSD ug/L 800.0 103% 75-125 <br /> MSRPD ug/L 800.0 7.4% _<20.0 <br /> 200.7 08/06/21:212136AC CCV ppm 1.000 107% 90-110 <br /> CCB ppm -0.0023 0.02 <br /> CCV ppm 1.000 106% 90-110 <br /> CCB ppm -0.0024 0.02 <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (VI 2146076-001) Dup mg/L 0.1% 10 <br /> 2320B 08/15/21:212461AMM CCV mg/L 235.8 95.2% 90-110 <br /> CCV mg/L 235.8 98.2% 90-110 <br /> Bicarbonate 2320B (VI 2146076-001) Dup mg/L 0.2% 10 <br /> Carbonate 2320B (VI 2146076-001) Dup mg/L 0.0 10 <br /> Hydroxide 2320B (VI 2146076-001) Dup mg/L 0.0 10 <br /> Conductivity 2510B 08/20/21:212900sta ICB umbos/cm 0.100 1 <br /> ICV umhos/cm 999.0 99.6% 95-105 <br /> CCV umhos/cm 999.0 98.6% 95-105 <br /> E.C. 2510B 08/20/21:209569sta Blank umhos/cm ND <1 <br /> (CC 2182746-001) Dup umhos/cm 0.3% 5 <br /> Total Dissolved Solids(TFR) 2540CE 08/10/21:209102CTL Blank mg/L ND <20 <br /> LCS mg/L 991.1 100% 90-110 <br /> (STK2151145-001) Dup mg/L 2.8% 5 <br /> (STK2151145-001) Dup mg/L 1 0.2% 5 <br /> Chloride 300.0 08/06/21:208972MCA Blank mg/L ND <I <br /> LCS mg/L 25.00 99.4% 90-110 <br /> MS mg/L 50.00 99.4% 85-121 <br /> (STK2151149-001) MSD mg/L 50.00 100% 85-121 <br /> MSRPD mg/L 10.00 0.8% <19 <br /> MS mg/L 50.00 98.5% 85-121 <br /> (STK2151151-001) MSD mg/L 50.00 99.4% 85-121 <br /> MSRPD m 10.00 1 0.7% <19 <br /> 300.0 08/07/21:212315MCA CCB m9/L 0.09 1 <br /> CCV mg/L 25.00 98.5% 90-110 <br /> CCB mg/L 0.00 1 <br /> CCV mg/L 25.00 98.5% 90-110 <br /> Fluoride 300.0 08/06/21:208972MCA Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 101% 90-110 <br /> MS mg/L 5.000 104% 87-120 <br /> (STK2151149-001) MSD mg/L 5.000 105% 87-120 <br /> MSRPD mg/L 10.00 1.2% 516 <br /> MS mg/L 5.000 105% 87-120 <br /> (STK2151151-001) MSD mg/L 5.000 105% 87-120 <br /> MSRPD m 10.00 0.09% <16 <br /> 300.0 08/07/21:212315MCA CCB mg/L 0.000 0.1 <br /> CCV mg/L 2.500 101 % 90-110 <br /> CCB mg/L 0.000 0.1 <br /> CCV mg/L 2.500 101 % 90-110 <br /> Nitrate 300.0 08/06/21:208972MCA Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 99.8% 90-110 <br /> MS mg/L 40.00 101 % 85-119 <br /> (STK2151149-001) MSD mg/L 40.00 102% 85-119 <br /> MSRPD mg/L 10.00 0.8% 519 <br /> MS I mg/L 1 40.00 1 94.3% 1 85-119 <br /> Page 7of9 <br />