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March 8, 2023 <br /> San Joaquin County EHD Lab No. STK2332156 <br /> : <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> mmcm <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 02/19/2023:201647AMM ND mg/L 0.1% 10 <br /> Bicarbonate 2320B (SP 2302447-008) Dup mg/L 0.2% 10 <br /> E.C. 2320B (SP 2302447-008) Dup umhos/cm 0.1% 5 <br /> Solids,Total Dissolved 2540CE 02/17/2023:201779CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 100% 90-110 <br /> (STK2332165-011) Dup mg/L 1.4% 5 <br /> (STK2332165-011) Dup mg/L 0.9% 5 <br /> Chloride 300.0 02/16/2023:201811LDM Blank mg/L 1 <1 <br /> LCS mg/L 25.00 101 % 90-110 <br /> MS mg/L 50.00 109% 85-121 <br /> (STK2332084-001) MSD mg/L 50.00 112% 85-121 <br /> MSRPD mg/L 10.00 1.8% :519 <br /> MS mg/L 50.00 76.5% 85-121 435 <br /> (STK2332156-001) MSD mg/L 50.00 73.1 % 85-121 435 <br /> MSRPD mg/L 10.00 3.0% :519 <br /> Fluoride 300.0 02/16/2023:201811LDM 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 /> (STK2332084-001) MSD mg/L 5.000 104% 87-120 <br /> MSRPD mg/L 10.00 2.7% <_16 <br /> MS mg/L 5.000 104% 87-120 <br /> (STK2332156-001) MSD mg/L 5.000 100% 87-120 <br /> MSRPD mg/L 10.00 3.6% :516 <br /> Nitrate 300.0 02/16/2023:201811LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 100% 90-110 <br /> MS mg/L 40.00 80.9% 85-119 435 <br /> (STK2332084-001) MSD mg/L 40.00 84.0% 85-119 435 <br /> MSRPD mg/L 10.00 3.0% :519 <br /> MS mg/L 40.00 80.9% 85-119 435 <br /> (STK2332156-001) MSD mg/L 40.00 77.4% 85-119 435 <br /> MSRPD mg/L 10.00 3.2% :519 <br /> Nitrate+Nitrite as N 300.0 02/16/2023:201811LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 100% 90-110 <br /> MS mg/L 40.00 80.9% 85-119 435 <br /> (STK2332084-001) MSD mg/L 40.00 84.0% 85-119 435 <br /> MSRPD mg/L 10.00 3.0% :519 <br /> MS mg/L 40.00 80.9% 85-119 435 <br /> (STK2332156-001) MSD mg/L 40.00 77.4% 85-119 435 <br /> MSRPD mg/L 10.00 3.2% 1519 <br /> Nitrate Nitrogen 300.0 02/16/2023:201811LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 100% 90-110 <br /> MS mg/L 40.00 80.9% 85-119 435 <br /> (STK2332084-001) MSD mg/L 40.00 84.0% 85-119 435 <br /> MSRPD mg/L 10.00 3.0% :519 <br /> MS mg/L 40.00 80.9% 85-119 435 <br /> (STK2332156-001) MSD mg/L 40.00 77.4% 85-119 435 <br /> MSRPD mg/L 10.00 3.2% :519 <br /> Nitrite as Nitrogen 300.0 02/16/2023:201811LDM Blank mg/L 1 <0.4 <br /> LCS mg/L 15.00 101 % 90-110 <br /> MS mg/L 30.00 98.8% 74-126 <br /> Page 6 of 7 Page 6 of 7 <br />