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July 26, 2022 <br /> Lab No. : STK2239435 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> MMCM <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 07/18/2022:208042AMM ND mg/L 0.7% 10 <br /> Bicarbonate 2320B (STK2239316-005) Dup mg/L 0.7% 10 <br /> E.C. 2510B 07/18/2022:208018STA Blank umhos/cm ND <1 <br /> (STK2239378-002) Dup umhos/cm 0.4% 5 <br /> Solids,Total Dissolved 2540CE 07/11/2022:207676CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 98.7% 90-110 <br /> (SP 2211145-001) Dup mg/L 0.2% 5 <br /> (SP 2211145-001) Dup mg/L 0.8% 5 <br /> Chloride 300.0 07/07/2022:207603NJB Blank mg/L ND <1 <br /> LCS mg/L 25.00 101 % 90-110 <br /> MS mg/L 50.00 97.7% 85-121 <br /> (STK2238865-005) MSD mg/L 50.00 99.2% 85-121 <br /> MSRPD mg/L 10.00 1.4% :519 <br /> MS mg/L 50.00 95.0% 85-121 <br /> (VI 2244471-011) MSD mg/L 50.00 91.2% 85-121 <br /> MSRPD mg/L 10.00 2.5% :519 <br /> Fluoride 300.0 07/07/2022:207603NJB Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 102% 90-110 <br /> MS mg/L 5.000 100% 87-120 <br /> (STK2238865-005) MSD mg/L 5.000 102% 87-120 <br /> MSRPD mg/L 10.00 1.8% :516 <br /> MS mg/L 5.000 105% 87-120 <br /> (VI 2244471-011) MSD mg/L 5.000 102% 87-120 <br /> MSRPD mg/L 10.00 3.1% :516 <br /> Nitrate 300.0 07/07/2022:207603NJB Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 98.7% 90-110 <br /> MS mg/L 40.00 101 % 85-119 <br /> (STK2238865-005) MSD mg/L 40.00 103% 85-119 <br /> MSRPD mg/L 10.00 1.4% :519 <br /> MS mg/L 40.00 103% 85-119 <br /> (VI 2244471-011) MSD mg/L 40.00 102% 85-119 <br /> MSRPD mg/L 10.00 1.7% :519 <br /> Nitrate+Nitrite as N 300.0 07/07/2022:207603NJB Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 98.7% 90-110 <br /> MS mg/L 40.00 101 % 85-119 <br /> (STK2238865-005) MSD mg/L 40.00 103% 85-119 <br /> MSRPD mg/L 10.00 1.4% :519 <br /> MS mg/L 40.00 103% 85-119 <br /> (VI 2244471-011) MSD mg/L 40.00 102% 85-119 <br /> MSRPD mg/L 10.00 1.7% :519 <br /> Nitrate Nitrogen 300.0 07/07/2022:207603NJB Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 98.7% 90-110 <br /> MS mg/L 40.00 101 % 85-119 <br /> (STK2238865-005) MSD mg/L 40.00 103% 85-119 <br /> MSRPD mg/L 10.00 1.4% :519 <br /> MS mg/L 40.00 103% 85-119 <br /> (VI 2244471-011) MSD mg/L 40.00 102% 85-119 <br /> MSRPD mg/L 10.00 1.7% :519 <br /> Nitrite as Nitrogen 300.0 07/07/2022:207603NJB Blank mg/L ND <0.4 <br /> LCS mg/L 15.00 104% 90-110 <br /> Page 6 of 7 Page 6 of 7 <br />