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December 5, 2023 <br /> Lab No. : STK2356121 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 11/21/2023:213281AMM ND mg/L 0.3% 10 435 <br /> Bicarbonate 2320B (STK2355998-002) Dup mg/L 0.3% 10 <br /> E.C. 2320B (STK2355998-002) Dup umhos/cm 0.2% 5 <br /> Solids,Total Dissolved 2540CE 11/21/2023:213264CTL Blank mg/L ND <20 <br /> LCS mg/L 991.5 99.6% 90-110 <br /> (SP 2319405-001) Dup mg/L 0.6% 5 <br /> (SP 2319405-001) Dup mg/L 2.22% 5 <br /> Chloride 300.0 11/27/2023:213378LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 99.3% 90-110 <br /> MS mg/L 50.00 97.1% 67-117 <br /> (STK2356121-001) MSD mg/L 50.00 97.7% 67-117 <br /> MSRPD mg/L 0.5% :_7 <br /> MS mg/L 50.00 98.9% 67-117 <br /> (CH 2379092-001) MSD mg/L 50.00 99.1% 67-117 <br /> MSRPD mg/L 0.1% :57 <br /> Fluoride 300.0 11/27/2023:213378LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 99.6% 90-110 <br /> MS mg/L 5.000 99.5% 89-111 <br /> (STK2356121-001) MSD mg/L 5.000 100% 89-111 <br /> MSRPD mg/L 0.6% :59 <br /> MS mg/L 5.000 102% 89-111 <br /> (CH 2379092-001) MSD mg/L 5.000 102% 89-111 <br /> MSRPD mg/L 0.4% :59 <br /> Sulfate 300.0 11/27/2023:213378LDM Blank mg/L ND <0.5 <br /> LCS mg/L 50.00 100% 90-110 <br /> MS mg/L 100.0 96.6% 18-165 <br /> (STK2356121-001) MSD mg/L 100.0 97.2% 18-165 <br /> MSRPD mg/L 0.5% :57 <br /> MS mg/L 100.0 100% 18-165 <br /> (CH 2379092-001) MSD mg/L 100.0 100% 18-165 <br /> MSRPD mg/L 0.2% :_7 <br /> Nitrate 4500NO3F 11/21/2023:213268LFS Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 96.9% 80-120 <br /> MS mg/L 5.609 94.3% 66-125 <br /> (STK2356065-001) MSD mg/L 5.609 95.4% 66-125 <br /> MSRPD mg/L 0.8% :530.4 <br /> Nitrate+Nitrite as N 4500NO3F 11/21/2023:213268LFS Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 96.9% 80-120 <br /> MS mg/L 5.609 94.3% 66-125 <br /> (STK2356065-001) MSD mg/L 5.609 95.4% 66-125 <br /> MSRPD mg/L 0.8% :530.4 <br /> Nitrate Nitrogen 4500NO3F 11/21/2023:213268LFS Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 96.9% 80-120 <br /> MS mg/L 5.609 94.3% 66-125 <br /> (STK2356065-001) MSD mg/L 5.609 95.4% 66-125 <br /> MSRPD mg/L 0.8% :530.4 <br /> Nitrite as Nitrogen 4500NO3F 11/21/2023:213269LFS Blank mg/L ND <0.2 <br /> LCS mg/L 1.218 104% 80-120 <br /> MS mg/L 0.6090 101% 50-150 <br /> (STK2356065-001) MSD mg/L 0.6090 103% 50-150 <br /> Page 6 of 7 Page 6 of 7 <br />