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August 12, 2022 <br /> Lab No. : STK2250422 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 07/29/2022:208578AMM ND mg/L 1.09% 10 <br /> Bicarbonate 2320B (VI 2245634-002) Dup mg/L 1.05% 10 <br /> E.C. 2510B 07/29/2022:208526STA Blank umhos/cm ND <1 <br /> (STK2250420-001) Dup umhos/cm 0.3% 5 <br /> Solids,Total Dissolved 2540CE 07/27/2022:208425CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 101 % 90-110 <br /> (VI 2245607-001) Dup mg/L 0.3% 5 <br /> (VI 2245607-001) Dup mg/L 0.7% 5 <br /> Chloride 300.0 07/26/2022:208373MCA Blank mg/L ND <1 <br /> LCS mg/L 25.00 100% 90-110 <br /> MS mg/L 50.00 94.8% 85-121 <br /> (STK2250405-001) MSD mg/L 50.00 105% 85-121 <br /> MSRPD mg/L 10.00 8.9% :519 <br /> MS mg/L 50.00 93.5% 85-121 <br /> (STK2250420-001) MSD mg/L 50.00 93.8% 85-121 <br /> MSRPD mg/L 10.00 0.2% 5519 <br /> Fluoride 300.0 07/26/2022:208373MCA Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 101 % 90-110 <br /> MS mg/L 5.000 98.5% 87-120 <br /> (STK2250405-001) MSD mg/L 5.000 107% 87-120 <br /> MSRPD mg/L 10.00 7.7% :516 <br /> MS mg/L 5.000 102% 87-120 <br /> (STK2250420-001) MSD mg/L 5.000 102% 87-120 <br /> MSRPD mg/L 10.00 0.3% 5_16 <br /> Nitrate 300.0 07/26/2022:208373MCA Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 98.8% 90-110 <br /> MS mg/L 40.00 96.0% 85-119 <br /> (STK2250405-001) MSD mg/L 40.00 106% 85-119 <br /> MSRPD mg/L 10.00 8.8% :519 <br /> MS mg/L 40.00 99.0% 85-119 <br /> (STK2250420-001) MSD mg/L 40.00 99.2% 85-119 <br /> MSRPD mg/L 10.00 0.2% :519 <br /> Nitrate+Nitrite as N 300.0 07/26/2022:208373MCA Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 98.8% 90-110 <br /> MS mg/L 40.00 96.0% 85-119 <br /> (STK2250405-001) MSD mg/L 40.00 106% 85-119 <br /> MSRPD mg/L 10.00 8.8% :519 <br /> MS mg/L 40.00 99.0% 85-119 <br /> (STK2250420-001) MSD mg/L 40.00 99.2% 85-119 <br /> MSRPD mg/L 10.00 0.2% :519 <br /> Nitrate Nitrogen 300.0 07/26/2022:208373MCA Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 98.8% 90-110 <br /> MS mg/L 40.00 96.0% 85-119 <br /> (STK2250405-001) MSD mg/L 40.00 106% 85-119 <br /> MSRPD mg/L 10.00 8.8% 5519 <br /> MS mg/L 40.00 99.0% 85-119 <br /> (STK2250420-001) MSD mg/L 40.00 99.2% 85-119 <br /> MSRPD mg/L 10.00 0.2% :519 <br /> Nitrite as Nitrogen 300.0 07/26/2022:208373MCA Blank mg/L ND <0.4 <br /> LCS mg/L 15.00 101 % 90-110 <br /> Page 6 of 7 Page 6 of 7 <br />