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August 19, 2022 <br /> Lab No. : STK2250743 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 08/06/2022:208865AMM ND mg/L 0.1% 10 <br /> Bicarbonate 2320B (SP 2212343-001) Dup mg/L 0.3% 10 <br /> E.C. 2510B O8/04/2022:208779STA Blank umhos/cm ND <1 <br /> (SP 2212302-003) Dup umhos/cm 0.3% 5 <br /> Solids,Total Dissolved 2540CE 08/03/2022:208728CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 97.4% 90-110 <br /> (SP 2212334-005) Dup mg/L 0.5% 5 <br /> (SP 2212334-005) Dup mg/L 0.9% 5 <br /> Chloride 300.0 08/12/2022:209117MCA Blank mg/L ND <1 <br /> LCS mg/L 25.00 97.6% 90-110 <br /> MS mg/L 50.00 96.2% 85-121 <br /> (STK2250743-001) MSD mg/L 50.00 96.6% 85-121 <br /> MSRPD mg/L 10.00 0.3% :519 <br /> MS mg/L 50.00 87.9% 85-121 <br /> (CH 2276231-001) MSD mg/L 50.00 89.5% 85-121 <br /> MSRPD mg/L 10.00 1.1% 5519 <br /> Fluoride 300.0 08/12/2022:209117MCA Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 98.0% 90-110 <br /> MS mg/L 5.000 98.9% 87-120 <br /> (STK2250743-001) MSD mg/L 5.000 99.6% 87-120 <br /> MSRPD mg/L 10.00 0.8% :516 <br /> MS mg/L 5.000 95.7% 87-120 <br /> (CH 2276231-001) MSD mg/L 5.000 97.4% 87-120 <br /> MSRPD mg/L 10.00 1.7% 5_16 <br /> Sulfate 300.0 08/12/2022:209117MCA Blank mg/L ND <0.5 <br /> LCS mg/L 50.00 101 % 90-110 <br /> MS mg/L 100.0 100% 82-124 <br /> (STK2250743-001) MSD mg/L 100.0 100% 82-124 <br /> MSRPD mg/L 10.00 0.4% :523 <br /> MS mg/L 100.0 95.5% 82-124 <br /> (CH 2276231-001) MSD mg/L 100.0 97.3% 82-124 <br /> MSRPD mg/L 10.00 1.6% :523 <br /> pH 4500-H B (VI 2245752-008) Dup units 0.1% 4.80 <br /> Nitrate 4500NO3F 08/02/2022:208673LFS Blank mg/L ND <0.2 <br /> LCS mg/L 11.22 97.5% 80-120 <br /> MS mg/L 5.609 96.1% 66-125 <br /> (VI 2245802-001) MSD mg/L 5.609 95.7% 66-125 <br /> MSRPD mg/L 5.609 0.1% 5_30.4 <br /> Nitrate+Nitrite as N 4500NO3F 08/02/2022:208673LFS Blank mg/L ND <0.2 <br /> LCS mg/L 11.22 97.5% 80-120 <br /> MS mg/L 5.609 96.1% 66-125 <br /> (VI 2245802-001) MSD mg/L 5.609 95.7% 66-125 <br /> MSRPD mg/L 5.609 0.1% :530.4 <br /> Nitrate Nitrogen 4500NO3F 08/02/2022:208673LFS Blank mg/L ND <0.2 <br /> LCS mg/L 11.22 97.5% 80-120 <br /> MS mg/L 5.609 96.1% 66-125 <br /> (VI 2245802-001) MSD mg/L 5.609 95.7% 66-125 <br /> MSRPD mg/L 5.609 0.1% :530.4 <br /> Nitrite as Nitrogen 4500NO3F 08/02/2022:208674LFS Blank mg/L ND <0.2 <br /> LCS mg/L 1.218 108% 80-120 <br /> Page 7 of 8 Page 7 of 8 <br />