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July 1, 2022 <br />Lab No. : STK2237542 <br />San Joaquin County EHD <br />Customer No. :3017919 <br />Quality Control - Wet Chem <br />Page 6 of 7 Page 6 of 7 <br />Wet Chem <br />Alkalinity (as CaCO3) <br />2320B <br />06112/2022:206531AMM <br />ND <br />mg/L <br />1.24% <br />10 <br />Bicarbonate <br />2320B <br />(VI 2243856-001) <br />Dup <br />mg/L <br />1.25% <br />10 <br />E. C. <br />2510B <br />06/03/2022:206163STA <br />Blank <br />umhos/cm <br />ND <br /><1 <br />(SP 2209153-001) <br />Dup <br />umhos/cm <br />0.2% <br />5 <br />Solids, Total Dissolved <br />2540CE <br />O6/02/2022:206137CTL <br />Blank <br />mg/L <br />ND <br /><20 <br />LCS <br />mg/L <br />990.8 <br />96.6% <br />90-110 <br />(SP 2209191-003) <br />Dup <br />mg/L <br />0.2% <br />5 <br />(SP 2209191-003) <br />Dup <br />mg/L <br />0.1% <br />5 <br />Chloride <br />300.0 <br />06/01/2022:206081NJB <br />Blank <br />mg/L <br />ND <br /><1 <br />LCS <br />mg/L <br />25.00 <br />100% <br />90-110 <br />MS <br />mg/L <br />50.00 <br />99.4% <br />85-121 <br />(STK2237048-001) <br />MSD <br />mg/L <br />50.00 <br />91.6% <br />85-121 <br />MSRPD <br />mg/L <br />10.00 <br />7.6% <br /><_19 <br />MS <br />mg/L <br />50.00 <br />91.1% <br />85-121 <br />(CC 2281779-001) <br />MSD <br />mg/L <br />50.00 <br />90.3% <br />85-121 <br />MSRPD <br />mg/L <br />10.00 <br />0.6% <br />.519 <br />Fluoride <br />300.0 <br />06/O1/2022:206081NJB <br />Blank <br />mg/L <br />ND <br /><0.1 <br />LCS <br />mg/L <br />2.500 <br />101 % <br />90-110 <br />MS <br />mg/L <br />5.000 <br />101% <br />87-120 <br />(STK2237048-001) <br />MSD <br />mg/L <br />5.000 <br />93.0% <br />87-120 <br />MSRPD <br />mg/L <br />10.00 <br />8.6% <br />:516 <br />MS <br />mg/L <br />5.000 <br />98.0% <br />87-120 <br />(CC 2281779-001) <br />MSD <br />mg/L <br />5.000 <br />97.7% <br />87-120 <br />MSRPD <br />mg/L <br />10.00 <br />0.2% <br />:516 <br />Nitrate <br />300.0 <br />06/01/2022:206081NJB <br />Blank <br />mg/L <br />ND <br /><0.4 <br />LCS <br />mg/L <br />20.00 <br />99.3% <br />90-110 <br />MS <br />mg/L <br />40.00 <br />99.9% <br />85-119 <br />(STK2237048-001) <br />MSD <br />mg/L <br />40.00 <br />92.0% <br />85-119 <br />MSRPD <br />mg/L <br />10.00 <br />8.3% <br />:519 <br />MS <br />mg/L <br />40.00 <br />96.2% <br />85-119 <br />(CC 2281779-001) <br />MSD <br />mg/L <br />40.00 <br />95.2% <br />85-119 <br />MSRPD <br />mg/L <br />10.00 <br />0.9% <br />:519 <br />Nitrate + Nitrite as N <br />300.0 <br />06/01/2022:206081NJB <br />Blank <br />mg/L <br />ND <br /><0.4 <br />LCS <br />mg/L <br />20.00 <br />99.3% <br />90-110 <br />MS <br />mg/L <br />40.00 <br />99.9% <br />85-119 <br />(STK2237048-001) <br />MSD <br />mg/L <br />40.00 <br />92.0% <br />85-119 <br />MSRPD <br />mg/L <br />10.00 <br />8.3% <br />:519 <br />MS <br />mg/L <br />40.00 <br />96.2% <br />85-119 <br />(CC 2281779-001) <br />MSD <br />mg/L <br />40.00 <br />95.2% <br />85-119 <br />MSRPD <br />mg/L <br />10.00 <br />0.9% <br />.519 <br />Nitrate Nitrogen <br />300.0 <br />06/01/2022:206081NJB <br />Blank <br />mg/L <br />ND <br /><0.4 <br />LCS <br />mg/L <br />20.00 <br />99.3% <br />90-110 <br />MS <br />mg/L <br />40.00 <br />99.9% <br />85-119 <br />(STK2237048-001) <br />MSD <br />mg/L <br />40.00 <br />92.0% <br />85-119 <br />MSRPD <br />mg/L <br />10.00 <br />8.3% <br />:519 <br />MS <br />mg/L <br />40.00 <br />96.2% <br />85-119 <br />(CC 2281779-001) <br />MSD <br />mg/L <br />40.00 <br />95.2% <br />85-119 <br />MSRPD <br />mg/L <br />10.00 <br />0.9% <br /><_19 <br />Nitrite as Nitrogen <br />300.0 <br />06/01/2022:206081NJB <br />Blank <br />mg/L <br />ND <br /><0.4 <br />LCS <br />mg/L <br />15.00 <br />100% <br />90-110 <br />Page 6 of 7 Page 6 of 7 <br />