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October 19, 2021 Lab ID : STK2154075 <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 10106/21:215674AC CCB PPM 0.04 1 <br /> inc 200.7 MS ug/L 800.0 102% 75-125 <br /> (STK2154210-001) MSD ug/L 800.0 99.6% 75-125 <br /> MSRPD u L 4000 1.9% <20.0 <br /> 200.7 10/06/21:215674AC CCV ppm 1.000 101% 90-110 <br /> CCB ppm 0.00002 0.02 <br /> CCV ppm 1.000 102% 90-110 <br /> CCB ppm 0.00001 0.02 <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (STK2154069-004) Du mgfL 1.19% 10 <br /> 2320B 10/12/21:215898amm CCV mg/l 235.8 93.3% 90-110 <br /> CCV mg1l 235.8 98.6% 90-110 <br /> Bicarbonate 2320B (STK2154069-004) Dup mg/L 1.17% 10 <br /> Carbonate 2320B (STK2154069-004) Dup mg/L 10 <br /> Hydroxide 2320B (STK2154069-004) Dup mg/L 10 <br /> Conductivity 2510B 10/13/21:215925sta ICB umhos/cm 0.160 1 <br /> CCV umhos/cm 999.0 99.4% 95-105 <br /> CCV umhos/cm 999.0 98.8% 95-105 <br /> E.C. 2510B 10/13/21:211848sta Blank umhos/cm ND <1 <br /> (STK2154218-003) Dup umhos/cm 0.3% 5 <br /> Total Dissolved Solids(TFR) 2540CE 10/05/21:211543CTL Blank mg/L ND <20 <br /> LCS mg/L 991.2 101 % 90-110 <br /> (SP 2113746-001) Dup mg/L 0.7% 5 <br /> (SP 2113746-001) Du mg/L 1 3.0% 5 <br /> Chloride 300.0 10/01/21:211396NJB Blank mg/L ND <1 <br /> LCS mg/L 25.00 104% 90-110 <br /> MS mg/L 50.00 97.1% 85-121 <br /> (STK2154077-001) MSD mg/L 50.00 105% 85-121 <br /> MSRPD mg/L 10.00 6.6% <19 <br /> MS mg/L 50.00 98.0% 85-121 <br /> (STK2154075-001) MSD mg/L 50.00 104% 85-121 <br /> MSRPD mg/L 10.00 5.4% <19 <br /> 300.0 10/02/21:215448njb CCB mg/l 0.00 1 <br /> CCV mg/I 25.00 104% 90-110 <br /> CCB mg/I 0.00 1 <br /> CCV m l 25.00 104% 90-110 <br /> Fluoride 300.0 10/01/21:211396NJB Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 105% 90-110 <br /> MS mg/L 5.000 102% 87-120 <br /> (STK2154077-001) MSD mg/L 5.000 110% 87-120 <br /> MSRPD mg/L 10.00 7.2% 516 <br /> MS mg/L 5.000 102% 87-120 <br /> (STK2154075-001) MSD mg/L 5.000 108% 87-120 <br /> MSRPD mg/L 10.00 5.5% <16 <br /> 300.0 10/02/21:215448njb CCB mg/l 0.00 0.1 <br /> CCV mg/l 2.500 105% 90-110 <br /> CCB mg/l 0.00 0.1 <br /> CCV mg/1 2.500 105% 90-110 <br /> Nitrate 300.0 10/01/21:211396NJB Blank mg/L ND <0.4 <br /> L.CS mg/L 20.00 104% 90-110 <br /> MS mg/L 40.00 100% 85-119 <br /> (STK2154077-001) MSD mg/L 40.00 108% 85-119 <br /> MSRPD mg/L 10.00 7.2% 519 <br /> MS I mg/L 1 40.00 1 100% 1 85-119 <br /> Page 7 of 9 <br />