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May 31, 2022 Lab ID : STK2235809 <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 04/30/22:206184AC CCB ppm -0.05 1 <br /> inc 200.7 MS ug/L 800.0 103% 75-125 <br /> (VI 2242994-011) MSD ug/L 800.0 103% 75-125 <br /> MSRPD ug/L 800.0 0.5% <20.0 <br /> 200.7 04/30/22:206184AC CCV ppm 1.000 106% 90-110 <br /> CCB ppm -0.0038 0.02 <br /> CCV ppm 1.000 108% 90-110 <br /> CCB ppro -0.0028 0.02 <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (STK2235722-001) Dup mg/L 0.1% 10 <br /> 2320B 05/08/22:206612amm CCV mg/l 235.8 99.4% 90-110 <br /> CCV mg/1 235.8 98.7% 90-110 <br /> Bicarbonate 2320B (STK2235722-001) Du m /L 0.2% 10 <br /> Carbonate 2320B (STK2235722-001) Dup mg/L 10 <br /> Hydroxide 2320B (STK2235722-001) Du m /L 10 <br /> Conductivity 2510B 05/03/22:2062890859 ICB umhos/cm 0.0800 1 <br /> CCV umhos/cm 997.0 102% 95-105 <br /> CCV umhos/cm 997.0 101% 95-105 <br /> E.C. 2510B 05/03/22:204826sta Blank umhos/cm ND <1 <br /> (STK2235731-001) Dup umhos/cm 0.2% 5 <br /> Total Dissolved Solids(TFR) 2540CE 04/29/22:204711 CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 97.4% 90-110 <br /> (CC 2281482-001) Dup mg/L 2.3% 5 <br /> (CC 2281482-001) Dup mg/L 1.6% 5 <br /> Chloride 300.0 04/28/22:204676NJB Blank mg/L ND <1 <br /> LCS mg/L 25.00 99.1% 90-110 <br /> MS mg/L 50.00 86.9% 85-121 <br /> (CH 2272802-001) MSD mg/L 50.00 91.6% 85-121 <br /> MSRPD mg/L 10.00 2.8% <_19 <br /> MS mg/L 50.00 86.4% 85-121 <br /> (CH 2272803-001) MSD mg/L 50.00 88.7% 85-121 <br /> MSRPD m /L 10.00 1.3% <19 <br /> 300.0 04/28/22:206162njb CCB mg/l 0.0920 1 <br /> CCV mg/l 25.00 95.2% 90-110 <br /> CCB mg/1 0.0870 1 <br /> CCV mg/1 25.00 95.1% 90-110 <br /> Fluoride 300.0 04/28/22:204676NJB Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 99.7% 90-110 <br /> MS mg/L 5.000 98.1% 87-120 <br /> (CH 2272802-001) MSD mg/L 5.000 103% 87-120 <br /> MSRPD mg/L 10.00 4.4% <_16 <br /> MS mg/L 5.000 97.2% 87-120 <br /> (CH 2272803-001) MSD mg/L 5.000 99.5% 87-120 <br /> MSRPD mg/L 10.00 2.1% Q6 <br /> 300.0 04/28/22:206162njb CCB mg/l 0.00 0.1 <br /> CCV mg/l 2.500 94.3% 90-110 <br /> CCB mg/l 0.00 0.1 <br /> CCV mg/l 2.500 95.5% 90-110 <br /> Nitrate 300.0 04/28/22:204676NJB Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 98.2% 90-110 <br /> MS mg/L 40.00 97.1% 85-119 <br /> (CH 2272802-001) MSD mg/L 40.00 102% 85-119 <br /> MSRPD mg/L 10.00 5.2% <19 <br /> MS I m /L 1 40.00 1 96.6% 1 85-119 <br /> Page 7 of 9 <br />