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December 16, 2022 <br /> Lab No. : STK225639O <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> . ®� MMCM <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 11/20/2022:213196AMM ND mg/L 10 <br /> Bicarbonate 2320B (SP 2218312-001) Dup mg/L 10 <br /> Carbonate 2320B (SP 2218312-001) Dup mg/L 10 <br /> E.C. 2320B (SP 2218312-001) Dup umhos/cm 0.5% 5 <br /> Hydroxide 2320B (SP 2218312-001) Dup mg/L 10 <br /> pH 2320B (SP 2218312-001) Dup units 4.51% 4.80 <br /> Solids,Total Dissolved 2540CE 11/16/2022:213050CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 98.7% 90-110 <br /> (SP 2218105-001) Dup mg/L 2.4% 5 <br /> (SP 2218105-001) Dup mg/L 1.4% 5 <br /> Chloride 300.0 12/14/2022:214029LDM Blank mg/L 1 <1 <br /> LCS mg/L 25.00 101 % 90-110 <br /> MS mg/L 50.00 104% 85-121 <br /> (STK2256390-001) MSD mg/L 50.00 100% 85-121 <br /> MSRPD mg/L 10.00 3.3% :519 <br /> MS mg/L 50.00 90.8% 85-121 <br /> (CH 2279535-004) MSD mg/L 50.00 83.4% 85-121 435 <br /> MSRPD mg/L 10.00 4.3% :519 <br /> Fluoride 300.0 12/14/2022:214029LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 101 % 90-110 <br /> MS mg/L 5.000 108% 87-120 <br /> (STK2256390-001) MSD mg/L 5.000 104% 87-120 <br /> MSRPD mg/L 10.00 3.7% :516 <br /> MS mg/L 5.000 105% 87-120 <br /> (CH 2279535-004) MSD mg/L 5.000 97.0% 87-120 <br /> MSRPD mg/L 10.00 7.7% :516 <br /> Sulfate 300.0 12/14/2022:214029LDM Blank mg/L ND <0.5 <br /> LCS mg/L 50.00 101 % 90-110 <br /> MS mg/L 100.0 106% 82-124 <br /> (STK2256390-001) MSD mg/L 100.0 102% 82-124 <br /> MSRPD mg/L 10.00 3.6% :523 <br /> MS mg/L 100.0 101 % 82-124 <br /> (CH 2279535-004) MSD mg/L 100.0 92.9% 82-124 <br /> MSRPD mg/L 10.00 6.4% :523 <br /> Nitrate 4500NO3F 11/15/2022:213008LFS Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 96.9% 80-120 <br /> MS mg/L 5.609 94.4% 66-125 <br /> (CH 2279565-001) MSD mg/L 5.609 98.1% 66-125 <br /> MSRPD mg/L 5.609 2.6% :530.4 <br /> Nitrate+Nitrite as N 4500NO3F 11/15/2022:213008LFS Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 96.9% 80-120 <br /> MS mg/L 5.609 94.4% 66-125 <br /> (CH 2279565-001) MSD mg/L 5.609 98.1% 66-125 <br /> MSRPD mg/L 5.609 2.6% 1530.4 <br /> Nitrate Nitrogen 4500NO3F 11/15/2022:213008LFS Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 96.9% 80-120 <br /> MS mg/L 5.609 94.4% 66-125 <br /> (CH 2279565-001) MSD mg/L 5.609 98.1% 66-125 <br /> MSRPD mg/L 5.609 2.6% :530.4 <br /> Nitrite as Nitrogen 4500NO3F 11/15/2022:213009LFS Blank mg/L ND <0.2 <br /> Page 7 of 8 Page 7 of 8 <br />