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September 8, 2022 <br /> Lab No. : STK2251012 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> MMCM <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 08/23/2022:209000AMM ND mg/L 0.5% 10 435 <br /> Bicarbonate 2320B (SP 2213477-003) Dup mg/L 0.6% 10 <br /> E.C. 2510B 08/18/2022:209369STA Blank umhos/cm ND <1 <br /> (SP 2212529-001) Dup umhos/cm 0.2% 5 <br /> Solids,Total Dissolved 2540CE 08/08/2022:208901CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 99.5% 90-110 <br /> (SP 2212619-001) Dup mg/L 1.1% 5 <br /> (SP 2212619-001) Dup mg/L 2.9% 5 <br /> Chloride 300.0 08/05/2022:208850NJB Blank mg/L ND <1 <br /> LCS mg/L 25.00 99.0% 90-110 <br /> MS mg/L 50.00 102% 85-121 <br /> (SP 2212062-001) MSD mg/L 50.00 96.5% 85-121 <br /> MSRPD mg/L 10.00 5.6% :519 <br /> MS mg/L 50.00 100% 85-121 <br /> (CH 2276231-002) MSD mg/L 50.00 97.9% 85-121 <br /> MSRPD mg/L 10.00 2.5% :519 <br /> Fluoride 300.0 08/05/2022:208850NJB Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 99.2% 90-110 <br /> MS mg/L 5.000 104% 87-120 <br /> (SP 2212062-001) MSD mg/L 5.000 98.0% 87-120 <br /> MSRPD mg/L 10.00 5.7% :516 <br /> MS mg/L 5.000 102% 87-120 <br /> (CH 2276231-002) MSD mg/L 5.000 99.6% 87-120 <br /> MSRPD mg/L 10.00 2.6% :516 <br /> Nitrate 300.0 08/05/2022:208850NJB Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 98.1 % 90-110 <br /> MS mg/L 40.00 102% 85-119 <br /> (SP 2212062-001) MSD mg/L 40.00 96.9% 85-119 <br /> MSRPD mg/L 10.00 5.6% :519 <br /> MS mg/L 40.00 101 % 85-119 <br /> (CH 2276231-002) MSD mg/L 40.00 98.9% 85-119 <br /> MSRPD mg/L 10.00 2.4% :519 <br /> Nitrate+Nitrite as N 300.0 08/05/2022:208850NJB Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 98.1 % 90-110 <br /> MS mg/L 40.00 102% 85-119 <br /> (SP 2212062-001) MSD mg/L 40.00 96.9% 85-119 <br /> MSRPD mg/L 10.00 5.6% :519 <br /> MS mg/L 40.00 101 % 85-119 <br /> (CH 2276231-002) MSD mg/L 40.00 98.9% 85-119 <br /> MSRPD mg/L 10.00 2.4% :519 <br /> Nitrate Nitrogen 300.0 08/05/2022:208850NJB Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 98.1 % 90-110 <br /> MS mg/L 40.00 102% 85-119 <br /> (SP 2212062-001) MSD mg/L 40.00 96.9% 85-119 <br /> MSRPD mg/L 10.00 5.6% :519 <br /> MS mg/L 40.00 101 % 85-119 <br /> (CH 2276231-002) MSD mg/L 40.00 98.9% 85-119 <br /> MSRPD mg/L 10.00 2.4% :519 <br /> Nitrite as Nitrogen 300.0 08/05/2022:208850NJB Blank mg/L ND <0.4 <br /> LCS mg/L 15.00 101 % 90-110 <br /> Page 7 of 8 Page 7 of 8 <br />