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May 24, 2024 <br /> Lab No. : STK2436947 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (CH 2473690-007) Dup mg/L 0.2% 10 <br /> Bicarbonate 2320B (CH 2473690-007) Dup mg/L 0.3% 10 <br /> Carbonate 2320B (CH 2473690-007) Dup mg/L 0% 10 <br /> E.C. 2320B (CH 2473690-007) Dup umhos/cm 0% 5 <br /> Hydroxide 2320B (CH 2473690-007) Dup mg/L 0% 10 <br /> Solids,Total Dissolved 2540CE 05/16/2024:205455CTL Blank mg/L ND <20 <br /> LCS mg/L 992.0 99.6% 90-110 <br /> (CC 2481787-002) Dup mg/L 0.2% 5 <br /> (CC 2481787-002) Dup mg/L 0.1% 5 <br /> Chloride 300.0 05/15/2024:205470LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 104% 90-110 <br /> MS mg/L 50.00 98.7% 67-117 <br /> (STK2436931-001) MSD mg/L 50.00 98.9% 67-117 <br /> MSRPD mg/L 0.2% :57 <br /> MS mg/L 50.00 96.8% 67-117 <br /> (STK2436930-001) MSD mg/L 50.00 97.1% 67-117 <br /> MSRPD mg/L 0.2% <_7 <br /> Fluoride 300.0 05/15/2024:205470LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 102% 90-110 <br /> MS mg/L 5.000 103% 89-111 <br /> (STK2436931-001) MSD mg/L 5.000 101% 89-111 <br /> MSRPD mg/L 2.2% :59 <br /> MS mg/L 5.000 104% 89-111 <br /> (STK2436930-001) MSD mg/L 5.000 102% 89-111 <br /> MSRPD mg/L 1.8% :59 <br /> Nitrate 300.0 05/15/2024:205470LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 105% 90-110 <br /> MS mg/L 40.00 99.4% 86-112 <br /> (STK2436931-001) MSD mg/L 40.00 99.4% 86-112 <br /> MSRPD mg/L 0.0% :57 <br /> MS mg/L 40.00 92.7% 86-112 <br /> (STK2436930-001) MSD mg/L 40.00 92.7% 86-112 <br /> MSRPD mg/L 0.0% :57 <br /> Nitrate+Nitrite as N 300.0 05/15/2024:205470LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 105% 90-110 <br /> MS mg/L 40.00 99.4% 86-112 <br /> (STK2436931-001) MSD mg/L 40.00 99.4% 86-112 <br /> MSRPD mg/L 0.0% :57 <br /> MS mg/L 40.00 92.7% 86-112 <br /> (STK2436930-001) MSD mg/L 40.00 92.7% 86-112 <br /> MSRPD mg/L 0.0% :57 <br /> Nitrate Nitrogen 300.0 05/15/2024:205470LDM Blank mg/L ND <0.1 <br /> LCS mg/L 4.518 105% 90-110 <br /> MS mg/L 9.036 99.4% 86-112 <br /> (STK2436931-001) MSD mg/L 9.036 99.3% 86-112 <br /> MSRPD mg/L 0.0% :57 <br /> MS mg/L 9.036 92.7% 86-112 <br /> (STK2436930-001) MSD mg/L 9.036 92.6% 86-112 <br /> MSRPD mg/L 0.0% :57 <br /> Nitrite as Nitrogen 300.0 05/15/2024:205470LDM Blank mg/L ND <0.1 <br /> Page 6 of 7 Page 6 of 7 <br />