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June 10, 2024 <br /> Lab No. : STK2437O76 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (STK2437091-005) Dup mg/L 0.2% 10 <br /> Bicarbonate 2320B (STK2437091-005) Dup mg/L 0.2% 10 <br /> Carbonate 2320B (STK2437091-005) Dup mg/L 0% 10 <br /> E.C. 2320B (STK2437091-005) Dup umhos/cm 0.07% 5 <br /> Hydroxide 2320B (STK2437091-005) Dup mg/L 0% 10 <br /> Solids,Total Dissolved 2540CE 05/20/2024:205622CTL Blank mg/L ND <20 <br /> LCS mg/L 992.0 96.7% 90-110 <br /> (VI 2443881-002) Dup mg/L 0.5% 5 <br /> (VI 2443881-002) Dup mg/L 2.09% 5 <br /> Chloride 300.0 06/03/2024:206270LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 103% 90-110 <br /> MS mg/L 50.00 104% 67-117 <br /> (SP 2408496-002) MSD mg/L 50.00 105% 67-117 <br /> MSRPD mg/L 0.2% :57 <br /> MS mg/L 50.00 104% 67-117 <br /> (STK2437617-001) MSD mg/L 50.00 105% 67-117 <br /> MSRPD mg/L 0.8% :57 <br /> Fluoride 300.0 06/03/2024:206270LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 101% 90-110 <br /> MS mg/L 5.000 103% 89-111 <br /> (SP 2408496-002) MSD mg/L 5.000 104% 89-111 <br /> MSRPD mg/L 1.0% :59 <br /> MS mg/L 5.000 103% 89-111 <br /> (STK2437617-001) MSD mg/L 5.000 104% 89-111 <br /> MSRPD mg/L 1.1% :59 <br /> Sulfate 300.0 06/03/2024:206270LDM Blank mg/L ND <0.5 <br /> LCS mg/L 50.00 103% 90-110 <br /> MS mg/L 100.0 104% 18-165 <br /> (SP 2408496-002) MSD mg/L 100.0 104% 18-165 <br /> MSRPD mg/L 0.2% :57 <br /> MS mg/L 100.0 103% 18-165 <br /> (STK2437617-001) MSD mg/L 100.0 104% 18-165 <br /> MSRPD mg/L 1.0% :57 <br /> Nitrate 4500NO3F 05/17/2024:205551ILP Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 100% 80-120 <br /> MS mg/L 5.609 111% 66-125 <br /> (VI 2443888-001) MSD mg/L 5.609 102% 66-125 <br /> MSRPD mg/L 8.0% :530.4 <br /> Nitrate+Nitrite as N 4500NO3F 05/17/2024:205551ILP Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 100% 80-120 <br /> MS mg/L 5.609 111% 66-125 <br /> (VI 2443888-001) MSD mg/L 5.609 102% 66-125 <br /> MSRPD mg/L 8.0% :530.4 <br /> Nitrate Nitrogen 4500NO3F 05/17/2024:205551ILP Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 100% 80-120 <br /> MS mg/L 5.609 111% 66-125 <br /> (VI 2443888-001) MSD mg/L 5.609 102% 66-125 <br /> MSRPD mg/L 8.0% 1530.4 <br /> Nitrite as Nitrogen 4500NO3F 05/17/2024:205614ILP Blank mg/L ND <0.2 <br /> LCS mg/L 1.218 102% 80-120 <br /> Page 7 of 8 Page 7 of 8 <br />