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June 5, 2023 <br /> Lab No. : STK2336789 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> MMCM <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 05/31/2023:205944AMM ND mg/L 8.35% 10 <br /> Bicarbonate 2320B (SP 2308530-001) Dup mg/L 9.64% 10 <br /> Carbonate 2320B (SP 2308530-001) Dup mg/L 18.2% 10 440 <br /> E.C. 2320B (SP 2308530-001) Dup umhos/cm 0.2% 5 <br /> Hydroxide 2320B (SP 2308530-001) Dup mg/L 18.2% 10 440 <br /> Solids,Total Dissolved 2540CE 05/26/2023:205799CTL Blank mg/L ND <20 <br /> LCS mg/L 993.7 99.2% 90-110 <br /> (CH 2373548-007) Dup mg/L 3.32% 5 <br /> (CH 2373548-007) Dup mg/L 1.32% 5 <br /> Chloride 300.0 05/26/2023:205864LDM Blank mg/L 1 <1 <br /> LCS mg/L 25.00 105% 90-110 <br /> MS mg/L 50.00 101 % 85-121 <br /> (STK2336728-001) MSD mg/L 50.00 99.2% 85-121 <br /> MSRPD mg/L 100.0 1.4% :519 <br /> MS mg/L 50.00 104% 85-121 <br /> (STK2336775-001) MSD mg/L 50.00 103% 85-121 <br /> MSRPD mg/L 100.0 1.4% :519 <br /> Fluoride 300.0 05/26/2023:205864LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 106% 90-110 <br /> MS mg/L 5.000 106% 87-120 <br /> (STK2336728-001) MSD mg/L 5.000 105% 87-120 <br /> MSRPD mg/L 100.0 1.3% :516 <br /> MS mg/L 5.000 106% 87-120 <br /> (STK2336775-001) MSD mg/L 5.000 105% 87-120 <br /> MSRPD mg/L 100.0 0.9% :516 <br /> Nitrate 300.0 05/26/2023:205864LDM Blank mg/L 1 <0.4 <br /> LCS mg/L 20.00 106% 90-110 <br /> MS mg/L 40.00 106% 85-119 <br /> (STK2336728-001) MSD mg/L 40.00 104% 85-119 <br /> MSRPD mg/L 100.0 1.6% :519 <br /> MS mg/L 40.00 106% 85-119 <br /> (STK2336775-001) MSD mg/L 40.00 105% 85-119 <br /> MSRPD mg/L 100.0 1.4% :519 <br /> Nitrate Nitrogen 300.0 05/26/2023:205864LDM Blank mg/L 1 <0.4 <br /> LCS mg/L 20.00 106% 90-110 <br /> MS mg/L 40.00 106% 85-119 <br /> (STK2336728-001) MSD mg/L 40.00 104% 85-119 <br /> MSRPD mg/L 100.0 1.6% 1519 <br /> MS mg/L 40.00 106% 85-119 <br /> (STK2336775-001) MSD mg/L 40.00 105% 85-119 <br /> MSRPD mg/L 100.0 1.4% :519 <br /> Nitrite as Nitrogen 300.0 05/26/2023:205864LDM Blank mg/L 1 <0.4 <br /> LCS mg/L 15.00 107% 90-110 <br /> MS mg/L 30.00 107% 74-126 <br /> (STK2336728-001) MSD mg/L 30.00 105% 74-126 <br /> MSRPD mg/L 100.0 1.9% :520 <br /> MS mg/L 30.00 106% 74-126 <br /> (STK2336775-001) MSD mg/L 30.00 104% 74-126 <br /> MSRPD mg/L 100.0 1.4% <_20 <br /> Sulfate 300.0 05/26/2023:205864LDM Blank mg/L ND <0.5 <br /> Page 6 of 7 Page 6 of 7 <br />