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June 12, 2024 <br /> Lab No. : STK2437844 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> . ®� MMCM <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (SP 2408853-001) Dup mg/L 0.4% 10 <br /> Bicarbonate 2320B (SP 2408853-001) Dup mg/L 0.5% 10 <br /> Carbonate 2320B (SP 2408853-001) Dup mg/L 0% 10 <br /> E.C. 2320B (SP 2408853-001) Dup umhos/cm 0.2% 5 <br /> Hydroxide 2320B (SP 2408853-001) Dup mg/L 0% 10 <br /> Solids,Total Dissolved 2540CE 06/04/2024:206207CTL Blank mg/L ND <20 <br /> LCS mg/L 990.5 102% 90-110 <br /> (STK2437891-001) Dup mg/L 0.3% 5 <br /> (STK2437891-001) Dup mg/L 0.9% 5 <br /> Chloride 300.0 06/07/2024:206377LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 105% 90-110 <br /> MS mg/L 50.00 102% 67-117 <br /> (SP 2409064-002) MSD mg/L 50.00 103% 67-117 <br /> MSRPD mg/L 0.1% :57 <br /> MS mg/L 50.00 105% 67-117 <br /> (CH 2474441-002) MSD mg/L 50.00 104% 67-117 <br /> MSRPD mg/L 0.4% :57 <br /> Fluoride 300.0 06/07/2024:206377LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 100% 90-110 <br /> MS mg/L 5.000 104% 89-111 <br /> (SP 2409064-002) MSD mg/L 5.000 104% 89-111 <br /> MSRPD mg/L 0.2% :59 <br /> MS mg/L 5.000 105% 89-111 <br /> (CH 2474441-002) MSD mg/L 5.000 105% 89-111 <br /> MSRPD mg/L 0.8% :59 <br /> Sulfate 300.0 06/07/2024:206377LDM Blank mg/L ND <0.5 <br /> LCS mg/L 50.00 104% 90-110 <br /> MS mg/L 100.0 102% 18-165 <br /> (SP 2409064-002) MSD mg/L 100.0 102% 18-165 <br /> MSRPD mg/L 0.1% :57 <br /> MS mg/L 100.0 104% 18-165 <br /> (CH 2474441-002) MSD mg/L 100.0 104% 18-165 <br /> MSRPD mg/L 0.2% :57 <br /> Nitrite as Nitrogen 4500NO2B 06/01/2024:206169AMM MS mg/L 0.2284 96.4% 1-173 <br /> (STK2437774-006) MSD mg/L 0.2284 99.4% 1-173 <br /> MSRPD mg/L 3.1% :520 <br /> Nitrate 4500NO3F 06/07/2024:206372ILP Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 99.6% 80-120 <br /> MS mg/L 5.609 85.5% 66-125 <br /> (SP 2409142-001) MSD mg/L 5.609 85.4% 66-125 <br /> MSRPD mg/L 0.0% :530.4 <br /> Nitrate+Nitrite as N 4500NO3F 06/07/2024:206372ILP Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 99.6% 80-120 <br /> MS mg/L 5.609 85.5% 66-125 <br /> (SP 2409142-001) MSD mg/L 5.609 85.4% 66-125 <br /> MSRPD mg/L 0.0% :530.4 <br /> Nitrate Nitrogen 4500NO3F 06/07/2024:206372ILP Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 99.6% 80-120 <br /> MS mg/L 5.609 85.5% 66-125 <br /> (SP 2409142-001) MSD mg/L 5.609 85.4% 66-125 <br /> Page 7 of 8 Page 7 of 8 <br />