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October 18, 2022 <br /> Lab No. : STK2254134 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 10/07/2022:211455STA ND mg/L 1.34% 10 <br /> Bicarbonate 2320B (CC 2283723-001) Dup mg/L 1.39% 10 <br /> E.C. 2320B (CC 2283723-001) Dup umhos/cm 0% 5 <br /> pH 2320B (CC 2283723-001) Dup units 0.1% 4.80 <br /> Solids,Total Dissolved 2540CE 10/05/2022:211335CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 99.1 % 90-110 <br /> (SP 2215787-002) Dup mg/L 0.5% 5 <br /> (SP 2215787-002) Dup mg/L 1.6% 5 <br /> Chloride 300.0 10/04/2022:211637LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 99.4% 90-110 <br /> MS mg/L 50.00 87.7% 85-121 <br /> (SP 2215660-005) MSD mg/L 50.00 91.4% 85-121 <br /> MSRPD mg/L 10.00 2.4% :519 <br /> MS mg/L 50.00 87.2% 85-121 <br /> (CH 2277976-001) MSD mg/L 50.00 89.2% 85-121 <br /> MSRPD mg/L 10.00 1.3% :519 <br /> Fluoride 300.0 10/04/2022:211637LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 100% 90-110 <br /> MS mg/L 5.000 97.9% 87-120 <br /> (SP 2215660-005) MSD mg/L 5.000 101 % 87-120 <br /> MSRPD mg/L 10.00 3.2% <_16 <br /> MS mg/L 5.000 96.2% 87-120 <br /> (CH 2277976-001) MSD mg/L 5.000 99.0% 87-120 <br /> MSRPD mg/L 10.00 2.4% :516 <br /> Nitrate 300.0 10/04/2022:211637LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 99.2% 90-110 <br /> MS mg/L 40.00 96.7% 85-119 <br /> (SP 2215660-005) MSD mg/L 40.00 101 % 85-119 <br /> MSRPD mg/L 10.00 4.3% :519 <br /> MS mg/L 40.00 96.7% 85-119 <br /> (CH 2277976-001) MSD mg/L 40.00 99.0% 85-119 <br /> MSRPD mg/L 10.00 2.1% :519 <br /> Nitrate+Nitrite as N 300.0 10/04/2022:211637LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 99.2% 90-110 <br /> MS mg/L 40.00 96.7% 85-119 <br /> (SP 2215660-005) MSD mg/L 40.00 101 % 85-119 <br /> MSRPD mg/L 10.00 4.3% :519 <br /> MS mg/L 40.00 96.7% 85-119 <br /> (CH 2277976-001) MSD mg/L 40.00 99.0% 85-119 <br /> MSRPD mg/L 10.00 2.1% :519 <br /> Nitrate Nitrogen 300.0 10/04/2022:211637LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 99.2% 90-110 <br /> MS mg/L 40.00 96.7% 85-119 <br /> (SP 2215660-005) MSD mg/L 40.00 101 % 85-119 <br /> MSRPD mg/L 10.00 4.3% :519 <br /> MS mg/L 40.00 96.7% 85-119 <br /> (CH 2277976-001) MSD mg/L 40.00 99.0% 85-119 <br /> MSRPD mg/L 10.00 2.1% :519 <br /> Nitrite as Nitrogen 300.0 10/04/2022:211637LDM Blank mg/L ND <0.4 <br /> LCS mg/L 15.00 100% 90-110 <br /> Page 7 of 8 Page 7 of 8 <br />