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May 31, 2022 Lab ID : STK2235613 <br /> San Joaquin Co. Environmental Health Dep Customer : 3-17919 <br /> Quality Control-Inorganic <br /> Constituent Method Date/1D Type Units Conc. QC Data DQO Note <br /> Metals <br /> Sodium 200.7 04/26/22:205971AC CCB ppm -0.08 1 <br /> inc 200.7 MS ug/L 800.0 96.8% 75-125 <br /> (STK2235620-001) MSD ug/L 800.0 92.8% 75-125 <br /> MSRPD ug/L 4000 3.9% <20.0 <br /> 200.7 04/26/22:205971AC CCV ppm 1.000 100% 90-110 <br /> CCB ppm -0.0116 0.02 <br /> CCV ppm 1.000 92.9% 90-110 <br /> CCB pprn 0.0074 0.02 <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (SP 2206741-004) Dup mg/L 0% 10 <br /> 2320B 05/05/22:206425amm CCV mg/1 235.8 97.9% 90-110 <br /> CCV mg/l 235.8 96.6% 90-110 <br /> Bicarbonate 2320B (SP 2206741-004) Dup m 0% 10 <br /> Carbonate 2320B (SP 2206741-004) Dup mg/L 10 <br /> Hydroxide 2320B (SP 2206741-004) Dup m 10 <br /> Conductivity 2510B 05/10/22:206650sta ICB umhos/cm 0.140 1 <br /> CCV umhos/cm 996.0 100% 95-105 <br /> CCV umhos/cm 996.0 98.0% 95-105 <br /> E.C. 2510B 05/10/22:205128sta Blank umhos/cm ND <1 <br /> (SP 2206739-005) Dup umhos/cm 0.2% 5 <br /> Total Dissolved Solids(TFR) 2540CE 04/26/22:20455ICTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 100% 90-110 <br /> (SP 2206738-001) Dup mg/L 1.4% 5 <br /> (SP 2206738-001) Dup mg/L 1 0.7% 5 <br /> Chloride 300.0 05/11/22:205176NJB Blank mg/L ND <1 <br /> LCS mg/L 25.00 99.8% 90-110 <br /> MS mg/L 50.00 93.2% 85-121 <br /> (CH 2273148-003) MSD mg/L 50.00 101% 85-121 <br /> MSRPD mg/L 10.00 7.3% S19 <br /> 300.0 05/12/22:206818njb CCB mg/l 0.0880 1 <br /> CCV mg/l 25.00 99.7% 90-110 <br /> CCB mg/l 0.0920 1 <br /> CCV m /l 25.00 99.7% 90-110 <br /> Fluoride 300.0 05/11/22:205176NJB Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 101% 90-110 <br /> MS mg/L 5.000 95.2% 87-120 <br /> (CH 2273148-003) MSD mg/L 5.000 103% 87-120 <br /> MSRPD mg/L 10.00 7.4% <16 <br /> 300.0 05/12/22:206818njb CCB mg/l 0.00 0.1 <br /> CCV mg/l 2.500 98.5% 90-110 <br /> CCB mg/l 0.00 0.1 <br /> CCV m /l 2.500 97.8% 90-110 <br /> Sulfate 300.0 05/11/22:205176NJB Blank mg/L ND <0.5 <br /> LCS mg/L 50.00 102% 90-110 <br /> MS mg/L 100.0 95.0% 82-124 <br /> (CH 2273148-003) MSD mg/L 100.0 102% 82-124 <br /> MSRPD m 10.00 7.3% <23 <br /> 300.0 05/12/22:206818njb CCB mg/l 0.172 0.5 <br /> CCV mg/l 50.00 103% 90-110 <br /> CCB mg/l 0.174 0.5 <br /> CCV m /l 50.00 104% 90-110 <br /> Nitrite as Nitrogen 450ONO2B MS mg/L 0.2284 96.2% 1-173 <br /> (STK2235485-001) MSD mg/L 0.2284 92.2% 1-173 <br /> MSRPD I mg/L 1 0.2284 1 0.0092 <0.1 <br /> Page 7 of 8 <br />