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October 19, 2021 Lab ID : STK2154221 <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 10/06/21:215674AC 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 ug/L 4000 1.9%a _<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 (STK2154385-002) Dup mg/l, 9.62% l0 <br /> 2320B 10/12/21:21595lamm CCV mg/l 235.8 95.0% 90-110 <br /> CCV mg1l 235.8 93.6% 90-110 <br /> Bicarbonate 2320B (STK2154385-002) Dup mg/L 9.63% 10 <br /> Carbonate 2320B (STK2154385-002) Dup mg/L 10 <br /> Hydroxide 2320B (STK2154385-002) Dup mg/L 10 <br /> Conductivity 2510B 10/15/21:216064sta ICB umhos/cm 0.130 1 <br /> CCV umbos/cm 999.0 98.6% 95-105 <br /> CCV umhos/cm 999.0 98.1% 95-105 <br /> E.C. 2510B 10/15/21:211962sta Blank umhos/cm ND <I <br /> (SP 2113928-003) Dup umhos/cm 0.4% 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 2113935-002) Dup mg/L 0.07% 5 <br /> (SP 2113935-002) Du m 1.9% 5 <br /> Chloride 300.0 10/05/21:211545NJB Blank mg/L ND <1 <br /> LCS mg/L 25.00 104% 90-110 <br /> MS mg/L 50.00 104% 85-121 <br /> (STK2154227-001) MSD mg/L 50.00 93.7% 85-121 <br /> MSRPD m 10.00 9.0% <19 <br /> 300.0 10/05/21:215599njb CCB mg/l 0.00 1 <br /> CCV mg/l 25.00 101% 90-110 <br /> CCB mg/l 0.134 1 <br /> CCV -mg1l 25.00 101% 90-110 <br /> Fluoride 300.0 10/05/21:211545NJB Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 108% 90-110 <br /> MS mg/l. 5.000 107% 87-120 <br /> (STK2154227-001) MSD mg/L 5.000 96.8% 87-120 <br /> MSRPD mg/L 10.00 10.1% <16 <br /> 300.0 10/05/21:215599njb CCB mg/l 0.00 0.1 <br /> CCV mg/l 2.500 101% 90-110 <br /> CCB mg/l 0.00 0.1 <br /> CCV mg/l 2.500 101% 90-110 <br /> Nitrate 300.0 10/05/21:211545NJB Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 105% 90-110 <br /> MS mg/L 40.00 107% 85-119 <br /> (STK2154227-001) MSD mg/L 40.00 96.3% 85-119 <br /> MSRPD mg/L 10.00 10.7% <19 <br /> 300.0 10/05/21:215599njb CCB mg/l 0.00 0.5 <br /> CCV mg/l 20.00 102% 90-110 <br /> CCB mg/l 0.0960 0.5 <br /> CCV mg/l 20.00 102% 90-110 <br /> Nitrate+Nitrite as N 300.0 10/05/21:211545NJB Blank mg/L ND <0.1 <br /> Nitrate Nitrogen 300.0 10/05/21:211545NJB Blank mg/L ND <0.1 <br /> Nitrite 300.0 10/05/21:211545NJB Blank mg/L ND <0.5 <br /> Page 7 of 8 <br />