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November 16, 2022 <br /> Lab No. : STK2255037 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 10/21/2022:212038STA ND mg/L 0.4% 10 <br /> Bicarbonate 2320B (SP 2216713-001) Dup mg/L 0.4% 10 <br /> E.C. 2320B (SP 2216713-001) Dup umhos/cm 0.3% 5 <br /> pH 2320B (SP 2216713-001) Dup units 0.1% 4.80 <br /> Solids,Total Dissolved 2540CE 10/20/2022:211967CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 99.7% 90-110 <br /> (VI 2248325-001) Dup mg/L 1.7% 5 <br /> (VI 2248325-001) Dup mg/L 3.1% 5 <br /> Chloride 300.0 10/19/2022:212014LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 99.1 % 90-110 <br /> MS mg/L 50.00 50.3% 85-121 435 <br /> (SP 2216708-001) MSD mg/L 50.00 54.1 % 85-121 435 <br /> MSRPD mg/L 10.00 2.0% :519 <br /> MS mg/L 50.00 99.3% 85-121 <br /> (STK2254936-004) MSD mg/L 50.00 107% 85-121 <br /> MSRPD mg/L 10.00 4.1% :519 <br /> Fluoride 300.0 10/19/2022:212014LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 104% 90-110 <br /> MS mg/L 5.000 115% 87-120 <br /> (SP 2216708-001) MSD mg/L 5.000 143% 87-120 435 <br /> MSRPD mg/L 10.00 21.3% <_16 435 <br /> MS mg/L 5.000 102% 87-120 <br /> (STK2254936-004) MSD mg/L 5.000 124% 87-120 435 <br /> MSRPD mg/L 10.00 18.7% :516 435 <br /> Nitrate 300.0 10/19/2022:212014LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 104% 90-110 <br /> MS mg/L 40.00 94.7% 85-119 <br /> (SP 2216708-001) MSD mg/L 40.00 92.3% 85-119 <br /> MSRPD mg/L 10.00 1.4% :519 <br /> MS mg/L 40.00 80.4% 85-119 435 <br /> (STK2254936-004) MSD mg/L 40.00 81.3% 85-119 435 <br /> MSRPD mg/L 10.00 0.3% :519 <br /> Nitrate+Nitrite as N 300.0 10/19/2022:212014LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 104% 90-110 <br /> MS mg/L 40.00 94.7% 85-119 <br /> (SP 2216708-001) MSD mg/L 40.00 92.3% 85-119 <br /> MSRPD mg/L 10.00 1.4% :519 <br /> MS mg/L 40.00 80.4% 85-119 435 <br /> (STK2254936-004) MSD mg/L 40.00 81.3% 85-119 435 <br /> MSRPD mg/L 10.00 0.3% :519 <br /> Nitrate Nitrogen 300.0 10/19/2022:212014LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 104% 90-110 <br /> MS mg/L 40.00 94.7% 85-119 <br /> (SP 2216708-001) MSD mg/L 40.00 92.3% 85-119 <br /> MSRPD mg/L 10.00 1.4% :519 <br /> MS mg/L 40.00 80.4% 85-119 435 <br /> (STK2254936-004) MSD mg/L 40.00 81.3% 85-119 435 <br /> MSRPD mg/L 10.00 0.3% :519 <br /> Nitrite as Nitrogen 300.0 10/19/2022:212014LDM Blank mg/L ND <0.4 <br /> LCS mg/L 15.00 96.6% 90-110 <br /> Page 7 of 8 Page 7 of 8 <br />