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January 4, 2024 <br /> Lab No. : STK2357703 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (SP 2321112-012) Dup mg/L 1.16% 10 <br /> Bicarbonate 2320B (SP 2321112-012) Dup mg/L 1.21% 10 <br /> E.C. 2320B (SP 2321112-012) Dup umhos/cm 0.4% 5 <br /> Solids,Total Dissolved 2540CE 12/29/2023:214664CTL Blank mg/L ND <20 <br /> LCS mg/L 991.5 99.6% 90-110 <br /> (VI 2348811-001) Dup mg/L 0.9% 5 <br /> (VI 2348811-001) Dup mg/L 1.61% 5 <br /> Chloride 300.0 12/29/2023:200058LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 100% 90-110 <br /> MS mg/L 50.00 97.2% 67-117 <br /> (CH 2390873-001) MSD mg/L 50.00 97.9% 67-117 <br /> MSRPD mg/L 0.5% <_7 <br /> MS mg/L 50.00 99.5% 67-117 <br /> (STK2357703-001) MSD mg/L 50.00 99.5% 67-117 <br /> MSRPD mg/L 0.0% :57 <br /> Fluoride 300.0 12/29/2023:200058LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 101% 90-110 <br /> MS mg/L 5.000 103% 89-111 <br /> (CH 2390873-001) MSD mg/L 5.000 103% 89-111 <br /> MSRPD mg/L 0.5% :59 <br /> MS mg/L 5.000 104% 89-111 <br /> (STK2357703-001) MSD mg/L 5.000 103% 89-111 <br /> MSRPD mg/L 0.2% :59 <br /> Nitrate 300.0 12/29/2023:20005BLDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 99.8% 90-110 <br /> MS mg/L 40.00 103% 86-112 <br /> (CH 2390873-001) MSD mg/L 40.00 103% 86-112 <br /> MSRPD mg/L 0.5% :57 <br /> MS mg/L 40.00 98.8% 86-112 <br /> (STK2357703-001) MSD mg/L 40.00 98.9% 86-112 <br /> MSRPD mg/L 0.0% <_7 <br /> Nitrate+Nitrite as N 300.0 12/29/2023:200058LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 99.8% 90-110 <br /> MS mg/L 40.00 103% 86-112 <br /> (CH 2390873-001) MSD mg/L 40.00 103% 86-112 <br /> MSRPD mg/L 0.5% :57 <br /> MS mg/L 40.00 98.8% 86-112 <br /> (STK2357703-001) MSD mg/L 40.00 98.9% 86-112 <br /> MSRPD mg/L 0.0% <_7 <br /> Nitrate Nitrogen 300.0 12/29/2023:200058LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 99.8% 90-110 <br /> MS mg/L 40.00 103% 86-112 <br /> (CH 2390873-001) MSD mg/L 40.00 103% 86-112 <br /> MSRPD mg/L 0.5% :57 <br /> MS mg/L 40.00 98.8% 86-112 <br /> (STK2357703-001) MSD mg/L 40.00 98.9% 86-112 <br /> MSRPD mg/L 0.0% :57 <br /> Nitrite as Nitrogen 300.0 12/29/2023:200058LDM Blank mg/L ND <0.4 <br /> LCS mg/L 15.00 102% 90-110 <br /> MS mg/L 30.00 104% 88-111 <br /> Page 6 of 7 Page 6 of 7 <br />