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March 21, 2023 <br /> Lab No. : STK2333064 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 03/12/2023:202678AMM ND mg/L 3.64% 10 <br /> Bicarbonate 2320B (VI 2341468-009) Dup mg/L 5.33% 10 <br /> Carbonate 2320B (VI 2341468-009) Dup mg/L 13.8% 10 440 <br /> E.C. 2320B (VI 2341468-009) Dup umhos/cm 0.3% 5 <br /> Hydroxide 2320B (VI 2341468-009) Dup mg/L 13.8% 10 440 <br /> Solids,Total Dissolved 2540CE 03/10/2023:202656CTL Blank mg/L ND <20 <br /> LCS mg/L 992.0 96.1 % 90-110 <br /> (SP 2303399-001) Dup mg/L 3.4% 5 <br /> (SP 2303399-001) Dup mg/L 1.5% 5 <br /> Chloride 300.0 03/09/2023:202645LDM Blank mg/L 1 <1 <br /> LCS mg/L 25.00 98.0% 90-110 <br /> MS mg/L 50.00 98.8% 85-121 <br /> (SP 2303307-001) MSD mg/L 50.00 92.7% 85-121 <br /> MSRPD mg/L 10.00 5.4% 5519 <br /> MS mg/L 50.00 93.6% 85-121 <br /> (SP 2303158-001) MSD mg/L 50.00 91.4% 85-121 <br /> MSRPD mg/L 10.00 1.5% .519 <br /> Fluoride 300.0 03/09/2023:202645LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 99.4% 90-110 <br /> MS mg/L 5.000 99.2% 87-120 <br /> (SP 2303307-001) MSD mg/L 5.000 93.4% 87-120 <br /> MSRPD mg/L 10.00 4.7% .516 <br /> MS mg/L 5.000 102% 87-120 <br /> (SP 2303158-001) MSD mg/L 5.000 100% 87-120 <br /> MSRPD mg/L 10.00 2.0% :516 <br /> Nitrate 300.0 03/09/2023:202645LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 98.2% 90-110 <br /> MS mg/L 40.00 102% 85-119 <br /> (SP 2303307-001) MSD mg/L 40.00 95.7% 85-119 <br /> MSRPD mg/L 10.00 5.9% 5519 <br /> MS mg/L 40.00 102% 85-119 <br /> (SP 2303158-001) MSD mg/L 40.00 99.4% 85-119 <br /> MSRPD mg/L 10.00 2.3% :519 <br /> Nitrate+Nitrite as N 300.0 03/09/2023:202645LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 98.2% 90-110 <br /> MS mg/L 40.00 102% 85-119 <br /> (SP 2303307-001) MSD mg/L 40.00 95.7% 85-119 <br /> MSRPD mg/L 10.00 5.9% :519 <br /> MS mg/L 40.00 102% 85-119 <br /> (SP 2303158-001) MSD mg/L 40.00 99.4% 85-119 <br /> MSRPD mg/L 10.00 2.3% .519 <br /> Nitrate Nitrogen 300.0 03/09/2023:202645LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 98.2% 90-110 <br /> MS mg/L 40.00 102% 85-119 <br /> (SP 2303307-001) MSD mg/L 40.00 95.7% 85-119 <br /> MSRPD mg/L 10.00 5.9% :519 <br /> MS mg/L 40.00 102% 85-119 <br /> (SP 2303158-001) MSD mg/L 40.00 99.4% 85-119 <br /> MSRPD mg/L 10.00 2.3% 5519 <br /> Nitrite as Nitrogen 300.0 03/09/2023:202645LDM Blank mg/L ND <0.4 <br /> Page 6 of 7 Page 6 of 7 <br />