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March 21, 2023 <br /> Lab No. : STK2332742 <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 1.61% 10 435 <br /> Bicarbonate 2320B (SP 2303010-005) Dup mg/L 1.57% 10 <br /> E.C. 2320B (SP 2303010-005) Dup umhos/cm 0.4% 5 <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 94.3% 90-110 <br /> MS mg/L 50.00 92.4% 85-121 <br /> (CH 2371299-001) MSD mg/L 50.00 96.0% 85-121 <br /> MSRPD mg/L 10.00 3.5% 5519 <br /> MS mg/L 50.00 95.0% 85-121 <br /> (CH 2371298-001) MSD mg/L 50.00 101 % 85-121 <br /> MSRPD mg/L 10.00 6.0% 5519 <br /> Fluoride 300.0 03/02/2023:202364LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 94.5% 90-110 <br /> MS mg/L 5.000 93.7% 87-120 <br /> (CH 2371299-001) MSD mg/L 5.000 97.4% 87-120 <br /> MSRPD mg/L 10.00 3.8% 5_16 <br /> MS mg/L 5.000 96.4% 87-120 <br /> (CH 2371298-001) MSD mg/L 5.000 102% 87-120 <br /> MSRPD mg/L 10.00 5.7% .516 <br /> Nitrate 300.0 03/02/2023:202364LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 94.1 % 90-110 <br /> MS mg/L 40.00 94.5% 85-119 <br /> (CH 2371299-001) MSD mg/L 40.00 98.2% 85-119 <br /> MSRPD mg/L 10.00 3.6% :519 <br /> MS mg/L 40.00 96.7% 85-119 <br /> (CH 2371298-001) MSD mg/L 40.00 103% 85-119 <br /> MSRPD mg/L 10.00 5.9% 5519 <br /> Nitrate+Nitrite as N 300.0 03/02/2023:202364LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 94.1 % 90-110 <br /> MS mg/L 40.00 94.5% 85-119 <br /> (CH 2371299-001) MSD mg/L 40.00 98.2% 85-119 <br /> MSRPD mg/L 10.00 3.6% :519 <br /> MS mg/L 40.00 96.7% 85-119 <br /> (CH 2371298-001) MSD mg/L 40.00 103% 85-119 <br /> MSRPD mg/L 10.00 5.9% :519 <br /> Nitrate Nitrogen 300.0 03/02/2023:202364LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 94.1 % 90-110 <br /> MS mg/L 40.00 94.5% 85-119 <br /> (CH 2371299-001) MSD mg/L 40.00 98.2% 85-119 <br /> MSRPD mg/L 10.00 3.6% :519 <br /> MS mg/L 40.00 96.7% 85-119 <br /> (CH 2371298-001) MSD mg/L 40.00 103% 85-119 <br /> MSRPD mg/L 10.00 5.9% :519 <br /> Nitrite as Nitrogen 300.0 03/02/2023:202364LDM Blank mg/L 1 <0.4 <br /> LCS mg/L 15.00 93.2% 90-110 <br /> MS mg/L 30.00 93.4% 74-126 <br /> Page 6 of 7 Page 6 of 7 <br />