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October 28, 2022 <br /> Lab No. : STK2254925 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 10/23/2022:212080AMM ND mg/L 0.6% 10 <br /> Bicarbonate 2320B (VI 2248151-005) Dup mg/L 0.6% 10 <br /> E.C. 2320B (VI 2248151-005) Dup umhos/cm 0.8% 5 <br /> Solids,Total Dissolved 2540CE 10/18/2022:211871CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 102% 90-110 <br /> (CC 2283947-001) Dup mg/L 2.7% 5 <br /> (CC 2283947-001) Dup mg/L 1.2% 5 <br /> Chloride 300.0 10/26/2022:212286LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 100% 90-110 <br /> MS mg/L 50.00 99.2% 85-121 <br /> (STK2254925-001) MSD mg/L 50.00 92.3% 85-121 <br /> MSRPD mg/L 10.00 5.7% 5519 <br /> MS mg/L 50.00 102% 85-121 <br /> (STK2252467-001) MSD mg/L 50.00 98.8% 85-121 <br /> MSRPD mg/L 10.00 2.3% 5519 <br /> Fluoride 300.0 10/26/2022:212286LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 103% 90-110 <br /> MS mg/L 5.000 105% 87-120 <br /> (STK2254925-001) MSD mg/L 5.000 97.8% 87-120 <br /> MSRPD mg/L 10.00 7.0% 5_16 <br /> MS mg/L 5.000 106% 87-120 <br /> (STK2252467-001) MSD mg/L 5.000 103% 87-120 <br /> MSRPD mg/L 10.00 2.8% 5516 <br /> Sulfate 300.0 10/26/2022:212286LDM Blank mg/L ND <0.5 <br /> LCS mg/L 50.00 99.3% 90-110 <br /> MS mg/L 100.0 101 % 82-124 <br /> (STK2254925-001) MSD mg/L 100.0 93.9% 82-124 <br /> MSRPD mg/L 10.00 6.3% :523 <br /> MS mg/L 100.0 103% 82-124 <br /> (STK2252467-001) MSD mg/L 100.0 100% 82-124 <br /> MSRPD mg/L 10.00 2.5% 5_23 <br /> Nitrate 4500NO3F 10/18/2022:211885LFS Blank mg/L ND <0.2 <br /> LCS mg/L 11.22 96.7% 80-120 <br /> MS mg/L 5.609 95.4% 66-125 <br /> (SP 2216597-001) MSD mg/L 5.609 96.7% 66-125 <br /> MSRPD mg/L 5.609 0.9% :530.4 <br /> Nitrate+Nitrite as N 4500NO3F 10/18/2022:211885LFS Blank mg/L ND <0.2 <br /> LCS mg/L 11.22 96.7% 80-120 <br /> MS mg/L 5.609 95.4% 66-125 <br /> (SP 2216597-001) MSD mg/L 5.609 96.7% 66-125 <br /> MSRPD mg/L 5.609 0.9% :530.4 <br /> Nitrate Nitrogen 4500NO3F 10/18/2022:211885LFS Blank mg/L ND <0.2 <br /> LCS mg/L 11.22 96.7% 80-120 <br /> MS mg/L 5.609 95.4% 66-125 <br /> (SP 2216597-001) MSD mg/L 5.609 96.7% 66-125 <br /> MSRPD mg/L 5.609 0.9% :530.4 <br /> Nitrite as Nitrogen 4500NO3F 10/18/2022:211886LFS Blank mg/L ND <0.2 <br /> LCS mg/L 1.218 96.8% 80-120 <br /> MS mg/L 0.6090 95.1% 50-150 <br /> (SP 2216597-001) MSD mg/L 0.6090 101% 50-150 <br /> Page 6 of 7 Page 6 of 7 <br />