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April 14, 2021 Lab ID : STK2134147 <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 04/01/21:204805AC CCB PPM 0.02 1 <br /> inc 200.7 MS ug/L 800.0 98.5% 75-125 <br /> (SP 2104299-001) MSD ug/L 800.0 100% 75-125 <br /> MSRPD ug/L 4000 1.6% <20.0 <br /> 200.7 04/01/21:204805AC CCV ppm 1.000 107% 90-110 <br /> CCB ppm -0.0005 0.02 <br /> CCV ppm 1.000 102% 90-110 <br /> CCB ppm -0.0004 0.02 <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (CH 217203 1-00 1) Dup mg/L 0.07% 10 <br /> 2320B 04/05/21:204922AMM CCV mg/L 235.8 99.0% 90-110 <br /> CCV mg/L 235.8 103% 90-110 <br /> Bicarbonate 2320B (CH 217203 1-00 1) Dup mg/L 0.05% 10 <br /> Carbonate 2320B (CH 217203 1-00 1) Dun I m L 0.0 10 <br /> Hydroxide 2320B (CH 217203 1-00 1) Dup mg/L 0.0 10 <br /> Conductivity 2510B 04/06/21:204947sta ICB umhos/cm 0.06 1 <br /> CCV umhos/cm 999.0 97.3% 95-105 <br /> CCV umhos/cm 999.0 97.0% 95-105 <br /> E.C. 2510B 04/06/21:203644sta Blank umhos/cm ND <1 <br /> (SP 2104445-001) Dup umhos/cm 0.2% 5 <br /> Total Dissolved Solids(TFR) 2540CE 04/01/21:203492CTL Blank mg/L 4.3 20 <br /> LCS mg/L 995.0 101% 90-110 <br /> (SP 2104296-003) Dup mg/L 0.4% 5 <br /> (SP 2104296-003) Dup mg/L 2.0% 5 <br /> Chloride 300.0 03/31/21:203472MCA Blank mg/L ND <1 <br /> LCS mg/L 25.00 103% 90-110 <br /> MS mg/L 50.00 102% 85-121 <br /> (STK2134147-001) MSD mg/L 50.00 103% 85-121 <br /> MSRPD mg/L 10.00 0.7% <19 <br /> MS mg/L 50.00 89.6% 85-121 <br /> (CC 2180980-001) MSD mg/L 50.00 89.8% 85-121 <br /> MSRPD mg/L 10.00 0.07% <19 <br /> 300.0 03/31/21:204969MCA ICB mg/L 0.00 1 <br /> ICV mg/L 25.00 103% 90-110 <br /> CCB mg/L 0.09 1 <br /> CCV mg/L 25.00 104% 90-110 <br /> Fluoride 300.0 03/31/21:203472MCA Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 104% 90-110 <br /> MS mg/L 5.000 104% 87-120 <br /> (STK2134147-001) MSD mg/L 5.000 106% 87-120 <br /> MSRPD mg/L. 10.00 1.4% 516 <br /> MS mg/L 5.000 105% 87-120 <br /> (CC 2180980-001) MSD mg/L 5.000 106% 87-120 <br /> MSRPD m 10.00 0.7% <16 <br /> 300.0 03/31/21:204969MCA 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 mg/L 2.500 105% 90-110 <br /> Nitrate 300.0 03/31/21:203472MCA Blank mg/L ND <0.4 <br /> LES mg/L 20.00 104% 90-110 <br /> MS mg/L 40.00 96.0% 85-119 <br /> (STK2134147-001) MSD mg/L 40.00 96.9% 85-119 <br /> MSRPD mg/L 10.00 0.6% <19 <br /> MS I mg/L 1 40.00 1 89.2% 1 85-119 <br /> Page 7 of 9 <br />