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February 10, 2023 <br /> Lab No. : STK2330452 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 01/17/2023:200374AMM ND mg/L 0.1% 10 435 <br /> Bicarbonate 2320B (CC 2380157-001) Dup mg/L 0% 10 <br /> E.C. 2320B (CC 2380157-001) Dup umhos/cm 0.2% 5 <br /> Solids,Total Dissolved 2540CE 01/13/2023:200344CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 101 % 90-110 <br /> (CC 2380159-001) Dup mg/L 3.0% 5 <br /> (CC 2380159-001) Dup mg/L 1.8% 5 <br /> Chloride 300.0 01/12/2023:200349LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 94.9% 90-110 <br /> MS mg/L 50.00 95.2% 85-121 <br /> (SP 2300284-002) MSD mg/L 50.00 96.1 % 85-121 <br /> MSRPD mg/L 10.00 0.7% 5519 <br /> MS mg/L 50.00 94.2% 85-121 <br /> (SP 2300284-005) MSD mg/L 50.00 98.1 % 85-121 <br /> MSRPD mg/L 10.00 3.6% 5519 <br /> Fluoride 300.0 01/12/2023:200349LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 96.3% 90-110 <br /> MS mg/L 5.000 99.3% 87-120 <br /> (SP 2300284-002) MSD mg/L 5.000 99.9% 87-120 <br /> MSRPD mg/L 10.00 0.5% 5_16 <br /> MS mg/L 5.000 96.2% 87-120 <br /> (SP 2300284-005) MSD mg/L 5.000 100% 87-120 <br /> MSRPD mg/L 10.00 3.9% .516 <br /> Nitrate 300.0 01/12/2023:200349LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 93.3% 90-110 <br /> MS mg/L 40.00 98.1 % 85-119 <br /> (SP 2300284-002) MSD mg/L 40.00 99.1 % 85-119 <br /> MSRPD mg/L 10.00 0.9% :519 <br /> MS mg/L 40.00 96.0% 85-119 <br /> (SP 2300284-005) MSD mg/L 40.00 99.9% 85-119 <br /> MSRPD mg/L 10.00 3.8% 5519 <br /> Nitrate+Nitrite as N 300.0 01/12/2023:200349LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 93.3% 90-110 <br /> MS mg/L 40.00 98.1 % 85-119 <br /> (SP 2300284-002) MSD mg/L 40.00 99.1 % 85-119 <br /> MSRPD mg/L 10.00 0.9% :519 <br /> MS mg/L 40.00 96.0% 85-119 <br /> (SP 2300284-005) MSD mg/L 40.00 99.9% 85-119 <br /> MSRPD mg/L 10.00 3.8% :519 <br /> Nitrate Nitrogen 300.0 01/12/2023:200349LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 93.3% 90-110 <br /> MS mg/L 40.00 98.1 % 85-119 <br /> (SP 2300284-002) MSD mg/L 40.00 99.1 % 85-119 <br /> MSRPD mg/L 10.00 0.9% :519 <br /> MS mg/L 40.00 96.0% 85-119 <br /> (SP 2300284-005) MSD mg/L 40.00 99.9% 85-119 <br /> MSRPD mg/L 10.00 3.8% :519 <br /> Nitrite as Nitrogen 300.0 01/12/2023:200349LDM Blank mg/L ND <0.4 <br /> LCS mg/L 15.00 94.9% 90-110 <br /> MS mg/L 30.00 98.4% 74-126 <br /> Page 6 of 7 Page 6 of 7 <br />