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February 14, 2023 <br /> Lab No. : STK2331515 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> MMCM <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 02/05/2023:201253AMM ND mg/L 1.25% 10 435 <br /> Bicarbonate 2320B (VI 2340471-001) Dup mg/L 1.70% 10 <br /> Carbonate 2320B (VI 2340471-001) Dup mg/L 0% 10 <br /> E.C. 2320B (VI 2340471-001) Dup umhos/cm 0.8% 5 <br /> Hydroxide 2320B (VI 2340471-001) Dup mg/L 0% 10 <br /> Solids,Total Dissolved 2540CE 02/06/2023:201279CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 96.3% 90-110 <br /> (STK2331390-001) Dup mg/L 1.3% 5 <br /> (STK2331390-001) Dup mg/L 2.3% 5 <br /> Chloride 300.0 02/03/2023:201221LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 102% 90-110 <br /> MS mg/L 50.00 97.5% 85-121 <br /> (STK2331230-001) MSD mg/L 50.00 103% 85-121 <br /> MSRPD mg/L 10.00 4.9% :519 <br /> MS mg/L 50.00 94.3% 85-121 <br /> (STK2331230-002) MSD mg/L 50.00 101 % 85-121 <br /> MSRPD mg/L 10.00 6.3% :519 <br /> Fluoride 300.0 02/03/2023:201221LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 104% 90-110 <br /> MS mg/L 5.000 99.3% 87-120 <br /> (STK2331230-001) MSD mg/L 5.000 104% 87-120 <br /> MSRPD mg/L 10.00 4.8% :516 <br /> MS mg/L 5.000 95.8% 87-120 <br /> (STK2331230-002) MSD mg/L 5.000 102% 87-120 <br /> MSRPD mg/L 10.00 6.3% :516 <br /> Nitrate 300.0 02/03/2023:201221LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 101 % 90-110 <br /> MS mg/L 40.00 98.8% 85-119 <br /> (STK2331230-001) MSD mg/L 40.00 104% 85-119 <br /> MSRPD mg/L 10.00 4.9% :519 <br /> MS mg/L 40.00 95.4% 85-119 <br /> (STK2331230-002) MSD mg/L 40.00 102% 85-119 <br /> MSRPD mg/L 10.00 6.2% :519 <br /> Nitrate+Nitrite as N 300.0 02/03/2023:201221LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 101 % 90-110 <br /> MS mg/L 40.00 98.8% 85-119 <br /> (STK2331230-001) MSD mg/L 40.00 104% 85-119 <br /> MSRPD mg/L 10.00 4.9% 1519 <br /> MS mg/L 40.00 95.4% 85-119 <br /> (STK2331230-002) MSD mg/L 40.00 102% 85-119 <br /> MSRPD mg/L 10.00 6.2% :519 <br /> Nitrate Nitrogen 300.0 02/03/2023:201221LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 101 % 90-110 <br /> MS mg/L 40.00 98.8% 85-119 <br /> (STK2331230-001) MSD mg/L 40.00 104% 85-119 <br /> MSRPD mg/L 10.00 4.9% :519 <br /> MS mg/L 40.00 95.4% 85-119 <br /> (STK2331230-002) MSD mg/L 40.00 102% 85-119 <br /> MSRPD mg/L 10.00 6.2% :519 <br /> Nitrite as Nitrogen 300.0 02/03/2023:201221LDM Blank mg/L 1 <0.4 <br /> Page 6 of 7 Page 6 of 7 <br />