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March 21, 2023 <br /> Lab No. : STK2332743 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 03/06/2023:202435AMM ND mg/L 0.09% 10 435 <br /> Bicarbonate 2320B (SP 2303061-001) Dup mg/L 1.07% 10 <br /> Carbonate 2320B (SP 2303061-001) Dup mg/L 2.93% 10 <br /> E.C. 2320B (SP 2303061-001) Dup umhos/cm 0% 5 <br /> Hydroxide 2320B (SP 2303061-001) Dup mg/L 2.93% 10 <br /> Solids,Total Dissolved 2540CE 03/03/2023:202349CTL Blank mg/L ND <20 <br /> LCS mg/L 992.0 98.7% 90-110 <br /> (VI 2341269-001) Dup mg/L 1.85% 5 <br /> (VI 2341269-001) Dup mg/L 0.4% 5 <br /> Chloride 300.0 03/02/2023:202364LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 97.8% 90-110 <br /> MS mg/L 50.00 101 % 85-121 <br /> (CH 2371380-001) MSD mg/L 50.00 92.2% 85-121 <br /> MSRPD mg/L 10.00 6.7% 5519 <br /> MS mg/L 50.00 90.6% 85-121 <br /> (CH 2371384-001) MSD mg/L 50.00 96.7% 85-121 <br /> MSRPD mg/L 10.00 5.0% .519 <br /> Fluoride 300.0 03/02/2023:202364LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 97.2% 90-110 <br /> MS mg/L 5.000 105% 87-120 <br /> (CH 2371380-001) MSD mg/L 5.000 95.8% 87-120 <br /> MSRPD mg/L 10.00 8.6% .516 <br /> MS mg/L 5.000 94.3% 87-120 <br /> (CH 2371384-001) MSD mg/L 5.000 101 % 87-120 <br /> MSRPD mg/L 10.00 6.3% :516 <br /> Nitrate 300.0 03/02/2023:202364LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 97.1 % 90-110 <br /> MS mg/L 40.00 104% 85-119 <br /> (CH 2371380-001) MSD mg/L 40.00 95.5% 85-119 <br /> MSRPD mg/L 10.00 7.5% 5519 <br /> MS mg/L 40.00 93.9% 85-119 <br /> (CH 2371384-001) MSD mg/L 40.00 100% 85-119 <br /> MSRPD mg/L 10.00 5.5% :519 <br /> Nitrate+Nitrite as N 300.0 03/02/2023:202364LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 97.1 % 90-110 <br /> MS mg/L 40.00 104% 85-119 <br /> (CH 2371380-001) MSD mg/L 40.00 95.5% 85-119 <br /> MSRPD mg/L 10.00 7.5% :519 <br /> MS mg/L 40.00 93.9% 85-119 <br /> (CH 2371384-001) MSD mg/L 40.00 100% 85-119 <br /> MSRPD mg/L 10.00 5.5% .519 <br /> Nitrate Nitrogen 300.0 03/02/2023:202364LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 97.1 % 90-110 <br /> MS mg/L 40.00 104% 85-119 <br /> (CH 2371380-001) MSD mg/L 40.00 95.5% 85-119 <br /> MSRPD mg/L 10.00 7.5% :519 <br /> MS mg/L 40.00 93.9% 85-119 <br /> (CH 2371384-001) MSD mg/L 40.00 100% 85-119 <br /> MSRPD mg/L 10.00 5.5% 5519 <br /> Nitrite as Nitrogen 300.0 03/02/2023:202364LDM Blank mg/L ND <0.4 <br /> Page 6 of 7 Page 6 of 7 <br />