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May 31, 2022 Lab ID : STK2236202 <br /> San Joaquin Co. Environmental Health Dep Customer : 3-17919 <br /> Quality Control-Inorganic <br /> Constituent Method Date/ID Type Units Cone. QC Data DQO Note <br /> Metals <br /> Sodium 200.7 05/10/22:206735AC CCB ppm 0.01 1 <br /> inc 200.7 MS ug/L 800.0 101% 75-125 <br /> (VI 2243197-006) MSD ug/L 800.0 93.5% 75-125 <br /> MSRPD ug/L 800.0 7.4% <20.0 <br /> 200.7 05/10/22:206735AC CCV ppm 1.000 100% 90-110 <br /> CCB ppm 0.0043 0.02 <br /> CCV ppm 1.000 105% 90-110 <br /> CCB ppro -0.0040 0.02 <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (VI2243231-003) Dup mg/L 1.30% 10 <br /> 2320B 05/16/22:207015amm CCV mg/l 235.8 97.8% 90-110 <br /> CCV mg/1 235.8 102% 90-110 <br /> Bicarbonate 2320B (VI 2243231-003) Du m /L 1.37% 10 <br /> Carbonate 2320B (VI 2243231-003) Dup mg/L 10 <br /> Hydroxide 2320B (VI 2243231-003) Dup m /L 10 <br /> Conductivity 2510B 05/17/22:207022sta ICB umhos/cm 0.150 1 <br /> CCV umhos/cm 996.0 100% 95-105 <br /> CCV umhos/cm 996.0 100% 95-105 <br /> E.C. 2510B 05/17/22:205416sta Blank umhos/cm ND <1 <br /> (STK2236500-001) Dup umhos/cm 0.3% 5 <br /> Total Dissolved Solids(TFR) 2540CE 05/09/22:205085CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 104% 90-110 <br /> (STK2236211-001) Dup mg/L 2.7% 5 <br /> (STK2236211-001) Dup mg/L 0.9% 5 <br /> Chloride 300.0 05/18/22:205495NJB Blank mg/L ND <1 <br /> LCS mg/L 25.00 99.7% 90-110 <br /> MS mg/L 50.00 94.8% 85-121 <br /> (STK2235995-003) MSD mg/L 50.00 97.8% 85-121 <br /> MSRPD mg/L 10.00 3.2% <_19 <br /> MS mg/L 50.00 92.4% 85-121 <br /> (CC 2281514-001) MSD mg/L 50.00 97.1% 85-121 <br /> MSRPD m /L 10.00 4.1% <19 <br /> 300.0 05/18/22:207306njb CCB mg/l 0.0760 1 <br /> CCV mg/l 25.00 99.8% 90-110 <br /> CCB mg/1 0.0770 1 <br /> CCV mg/l 25.00 99.9% 90-110 <br /> Fluoride 300.0 05/18/22:205495NJB Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 99.8% 90-110 <br /> MS mg/L 5.000 96.4% 87-120 <br /> (STK2235995-003) MSD mg/L 5.000 99.6% 87-120 <br /> MSRPD mg/L 10.00 3.3% <_16 <br /> MS mg/L 5.000 95.0% 87-120 <br /> (CC 2281514-001) MSD mg/L 5.000 99.5% 87-120 <br /> MSRPD mg/L 10.00 4.2% <16 <br /> 300.0 05/18/22:207306njb CCB mg/l 0.00 0.1 <br /> CCV mg/l 2.500 100% 90-110 <br /> CCB mg/l 0.00 0.1 <br /> CCV mg/l 2.500 99.9% 90-110 <br /> Nitrate 300.0 05/18/22:205495NJB Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 99.5% 90-110 <br /> MS mg/L 40.00 95.6% 85-119 <br /> (STK2235995-003) MSD mg/L 40.00 98.6% 85-119 <br /> MSRPD mg/L 10.00 3.1% <19 <br /> MS I m /L 1 40.00 1 95.3% 1 85-119 <br /> Page 7 of 9 <br />