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July 1, 2022 <br /> Lab No. : STK2237644 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> MMCM <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 06/13/2022:206616AMM ND mg/L 0.6% 10 <br /> Bicarbonate 2320B (STK2237387-002) Dup mg/L 0.6% 10 <br /> E.C. 2510B 06/07/2022:206313STA Blank umhos/cm ND <1 <br /> (SP 2208881-005) Dup umhos/cm 0.7% 5 <br /> Solids,Total Dissolved 2540CE 06/02/2022:206137CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 103% 90-110 <br /> (CH 2273882-001) Dup mg/L 3.3% 5 <br /> (CH 2273882-001) Dup mg/L 5.6% 5 440 <br /> Chloride 300.0 06/02/2022:206127NJB Blank mg/L ND <1 <br /> LCS mg/L 25.00 99.9% 90-110 <br /> MS mg/L 50.00 87.7% 85-121 <br /> (VI 2243483-001) MSD mg/L 50.00 81.6% 85-121 435 <br /> MSRPD mg/L 10.00 3.5% :519 <br /> MS mg/L 50.00 99.8% 85-121 <br /> (STK2237048-001) MSD mg/L 50.00 92.8% 85-121 <br /> MSRPD mg/L 10.00 6.9% :519 <br /> Fluoride 300.0 06/02/2022:206127NJB Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 100% 90-110 <br /> MS mg/L 5.000 101 % 87-120 <br /> (VI 2243483-001) MSD mg/L 5.000 94.5% 87-120 <br /> MSRPD mg/L 10.00 6.7% :516 <br /> MS mg/L 5.000 102% 87-120 <br /> (STK2237048-001) MSD mg/L 5.000 94.9% 87-120 <br /> MSRPD mg/L 10.00 7.1% :516 <br /> Nitrate 300.0 06/02/2022:206127NJB Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 99.9% 90-110 <br /> MS mg/L 40.00 100% 85-119 <br /> (VI 2243483-001) MSD mg/L 40.00 93.4% 85-119 <br /> MSRPD mg/L 10.00 6.5% :519 <br /> MS mg/L 40.00 101 % 85-119 <br /> (STK2237048-001) MSD mg/L 40.00 93.9% 85-119 <br /> MSRPD mg/L 10.00 7.1% :519 <br /> Nitrate+Nitrite as N 300.0 06/02/2022:206127NJB Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 99.9% 90-110 <br /> MS mg/L 40.00 100% 85-119 <br /> (VI 2243483-001) MSD mg/L 40.00 93.4% 85-119 <br /> MSRPD mg/L 10.00 6.5% :519 <br /> MS mg/L 40.00 101 % 85-119 <br /> (STK2237048-001) MSD mg/L 40.00 93.9% 85-119 <br /> MSRPD mg/L 10.00 7.1% :519 <br /> Nitrate Nitrogen 300.0 06/02/2022:206127NJB Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 99.9% 90-110 <br /> MS mg/L 40.00 100% 85-119 <br /> (VI 2243483-001) MSD mg/L 40.00 93.4% 85-119 <br /> MSRPD mg/L 10.00 6.5% :519 <br /> MS mg/L 40.00 101 % 85-119 <br /> (STK2237048-001) MSD mg/L 40.00 93.9% 85-119 <br /> MSRPD mg/L 10.00 7.1% :519 <br /> Nitrite as Nitrogen 300.0 06/02/2022:206127NJB Blank mg/L ND <0.4 <br /> LCS mg/L 15.00 102% 90-110 <br /> Page 6 of 7 Page 6 of 7 <br />