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March 27, 2023 <br /> Lab No. : STK2332955 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 03/08/2023:202548AMM ND mg/L 0.04% 10 <br /> Bicarbonate 2320B (STK2332844-004) Dup mg/L 0.2% 10 <br /> Carbonate 2320B (STK2332844-004) Dup mg/L 11.8% 10 440 <br /> E.C. 2320B (STK2332844-004) Dup umhos/cm 0.1% 5 <br /> Hydroxide 2320B (STK2332844-004) Dup mg/L 11.8% 10 440 <br /> Solids,Total Dissolved 2540CE 03/09/2023:202603CTL Blank mg/L ND <20 <br /> LCS mg/L 992.0 98.5% 90-110 <br /> (STK2332887-001) Dup mg/L 0.7% 5 <br /> (STK2332887-001) Dup mg/L 1.3% 5 <br /> Chloride 300.0 03/08/2023:202613LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 97.5% 90-110 <br /> MS mg/L 50.00 81.9% 85-121 435 <br /> (STK2332495-001) MSD mg/L 50.00 86.0% 85-121 <br /> MSRPD mg/L 10.00 2.4% 5519 <br /> MS mg/L 50.00 85.0% 85-121 <br /> (SP 2303371-001) MSD mg/L 50.00 89.9% 85-121 <br /> MSRPD mg/L 40.00 2.8% .519 <br /> Fluoride 300.0 03/08/2023:202613LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 96.8% 90-110 <br /> MS mg/L 5.000 95.8% 87-120 <br /> (STK2332495-001) MSD mg/L 5.000 100% 87-120 <br /> MSRPD mg/L 10.00 4.6% .516 <br /> MS mg/L 5.000 98.7% 87-120 <br /> (SP 2303371-001) MSD mg/L 5.000 105% 87-120 <br /> MSRPD mg/L 40.00 5.3% :516 <br /> Nitrate 300.0 03/08/2023:202613LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 96.7% 90-110 <br /> MS mg/L 40.00 95.6% 85-119 <br /> (STK2332495-001) MSD mg/L 40.00 100% 85-119 <br /> MSRPD mg/L 10.00 4.6% 5519 <br /> MS mg/L 40.00 87.5% 85-119 <br /> (SP 2303371-001) MSD mg/L 40.00 93.1 % 85-119 <br /> MSRPD mg/L 40.00 3.4% :519 <br /> Nitrate+Nitrite as N 300.0 03/08/2023:202613LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 96.7% 90-110 <br /> MS mg/L 40.00 95.6% 85-119 <br /> (STK2332495-001) MSD mg/L 40.00 100% 85-119 <br /> MSRPD mg/L 10.00 4.6% :519 <br /> MS mg/L 40.00 87.5% 85-119 <br /> (SP 2303371-001) MSD mg/L 40.00 93.1 % 85-119 <br /> MSRPD mg/L 40.00 3.4% .519 <br /> Nitrate Nitrogen 300.0 03/08/2023:202613LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 96.7% 90-110 <br /> MS mg/L 40.00 95.6% 85-119 <br /> (STK2332495-001) MSD mg/L 40.00 100% 85-119 <br /> MSRPD mg/L 10.00 4.6% :519 <br /> MS mg/L 40.00 87.5% 85-119 <br /> (SP 2303371-001) MSD mg/L 40.00 93.1 % 85-119 <br /> MSRPD mg/L 40.00 3.4% 5519 <br /> Nitrite as Nitrogen 300.0 03/08/2023:202613LDM Blank mg/L ND <0.4 <br /> Page 6 of 7 Page 6 of 7 <br />