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January 24, 2025 <br /> Lab No. : STK2530759 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (SP 2500583-002) Dup mg/L 0.7% 10 <br /> Bicarbonate 2320B (SP 2500583-002) Dup mg/L 0.7% 10 <br /> Carbonate 2320B (SP 2500583-002) Dup mg/L 0% 10 <br /> E.C. 2320B (SP 2500583-002) Dup umhos/cm 0.06% 5 <br /> Hydroxide 2320B (SP 2500583-002) Dup mg/L 0% 10 <br /> Solids,Total Dissolved 2540CE 01/17/2025:200609CTL Blank mg/L ND <20 <br /> LCS mg/L 991.1 101% 90-110 <br /> (SP 2500692-001) Dup mg/L 0.1% 5 <br /> (SP 2500692-001) Dup mg/L 1.31% 5 <br /> Chloride 300.0 01/20/2025:200689LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 90.7% 90-110 <br /> MS mg/L 50.00 93.9% 67-117 <br /> (VI 2540328-001) MSD mg/L 50.00 94.0% 67-117 <br /> MSRPD mg/L 0.1% :57 <br /> MS mg/L 50.00 86.8% 67-117 <br /> (CC 2580231-001) MSD mg/L 50.00 88.3% 67-117 <br /> MSRPD mg/L 1.1% :_7 <br /> Fluoride 300.0 01/20/2025:200689LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 92.2% 90-110 <br /> MS mg/L 5.000 96.2% 89-111 <br /> (VI 2540328-001) MSD mg/L 5.000 96.8% 89-111 <br /> MSRPD mg/L 0.7% :59 <br /> MS mg/L 5.000 95.7% 89-111 <br /> (CC 2580231-001) MSD mg/L 5.000 96.2% 89-111 <br /> MSRPD mg/L 0.6% :59 <br /> Sulfate 300.0 01/20/2025:200689LDM Blank mg/L ND <0.5 <br /> LCS mg/L 50.00 92.8% 90-110 <br /> MS mg/L 100.0 96.1% 18-165 <br /> (VI 2540328-001) MSD mg/L 100.0 96.2% 18-165 <br /> MSRPD mg/L 0.1% :57 <br /> MS mg/L 100.0 87.3% 18-165 <br /> (CC 2580231-001) MSD mg/L 100.0 88.7% 18-165 <br /> MSRPD mg/L 1.0% :57 <br /> pH 4500-H B (STK2530730-001) Dup units 0.3% 4.80 <br /> Nitrate 4500NO3F 01/16/2025:200566AKB Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 97.0% 80-120 <br /> MS mg/L 5.609 95.5% 66-125 <br /> (VI 2540343-001) MSD mg/L 5.609 95.2% 66-125 <br /> MSRPD mg/L 0.2% :530.4 <br /> Nitrate+Nitrite as N 4500NO3F 01/16/2025:200566AKB Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 97.0% 80-120 <br /> MS mg/L 5.609 95.5% 66-125 <br /> (VI 2540343-001) MSD mg/L 5.609 95.2% 66-125 <br /> MSRPD mg/L 0.2% 1530.4 <br /> Nitrate Nitrogen 4500NO3F 01/16/2025:200566AKB Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 97.0% 80-120 <br /> MS mg/L 5.609 95.5% 66-125 <br /> (VI 2540343-001) MSD mg/L 5.609 95.2% 66-125 <br /> MSRPD mg/L 0.2% :530.4 <br /> Nitrite as Nitrogen 4500NO3F 01/16/2025:200611AKB Blank mg/L ND <0.2 <br /> Page 7 of 8 Page 7 of 8 <br />