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February 10, 2023 <br /> San Joaquin County EHD Lab No. STK2331346 <br /> : <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 02/04/2023:201239AMM ND mg/L 0.2% 10 <br /> Bicarbonate 2320B (VI 2340484-001) Dup mg/L 0.2% 10 <br /> E.C. 2320B (VI 2340484-001) Dup umhos/cm 0.1% 5 <br /> Solids,Total Dissolved 2540CE 02/02/2023:201179CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 103% 90-110 <br /> (SP 2301488-001) Dup mg/L 2.2% 5 <br /> (SP 2301488-001) Dup mg/L 0.4% 5 <br /> Chloride 300.0 02/01/2023:201132LDM Blank mg/L 1 <1 <br /> LCS mg/L 25.00 96.7% 90-110 <br /> MS mg/L 50.00 102% 85-121 <br /> (VI 2340463-001) MSD mg/L 50.00 92.1 % 85-121 <br /> MSRPD mg/L 10.00 9.6% 5519 <br /> MS mg/L 50.00 91.4% 85-121 <br /> (SP 2301318-002) MSD mg/L 50.00 99.2% 85-121 <br /> MSRPD mg/L 10.00 6.6% 5519 <br /> Fluoride 300.0 02/01/2023:201132LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 97.5% 90-110 <br /> MS mg/L 5.000 104% 87-120 <br /> (VI 2340463-001) MSD mg/L 5.000 93.4% 87-120 <br /> MSRPD mg/L 10.00 10.3% 5_16 <br /> MS mg/L 5.000 94.6% 87-120 <br /> (SP 2301318-002) MSD mg/L 5.000 102% 87-120 <br /> MSRPD mg/L 10.00 7.9% .516 <br /> Nitrate 300.0 02/01/2023:201132LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 96.5% 90-110 <br /> MS mg/L 40.00 101 % 85-119 <br /> (VI 2340463-001) MSD mg/L 40.00 91.6% 85-119 <br /> MSRPD mg/L 10.00 8.1% :519 <br /> MS mg/L 40.00 93.9% 85-119 <br /> (SP 2301318-002) MSD mg/L 40.00 102% 85-119 <br /> MSRPD mg/L 10.00 7.0% 5519 <br /> Nitrate+Nitrite as N 300.0 02/01/2023:201132LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 96.5% 90-110 <br /> MS mg/L 40.00 101 % 85-119 <br /> (VI 2340463-001) MSD mg/L 40.00 91.6% 85-119 <br /> MSRPD mg/L 10.00 8.1% :519 <br /> MS mg/L 40.00 93.9% 85-119 <br /> (SP 2301318-002) MSD mg/L 40.00 102% 85-119 <br /> MSRPD mg/L 10.00 7.0% :519 <br /> Nitrate Nitrogen 300.0 02/01/2023:201132LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 96.5% 90-110 <br /> MS mg/L 40.00 101 % 85-119 <br /> (VI 2340463-001) MSD mg/L 40.00 91.6% 85-119 <br /> MSRPD mg/L 10.00 8.1% :519 <br /> MS mg/L 40.00 93.9% 85-119 <br /> (SP 2301318-002) MSD mg/L 40.00 102% 85-119 <br /> MSRPD mg/L 10.00 7.0% :519 <br /> Nitrite as Nitrogen 300.0 02/01/2023:201132LDM Blank mg/L 1 <0.4 <br /> LCS mg/L 15.00 96.7% 90-110 <br /> MS mg/L 30.00 102% 74-126 <br /> Page 6 of 7 Page 6 of 7 <br />