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February 23, 2024 <br /> Lab No. : STK2431908 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (STK2431955-001) Dup mg/L 1.67% 10 <br /> Bicarbonate 2320B (STK2431955-001) Dup mg/L 1.75% 10 <br /> E.C. 2320B (STK2431955-001) Dup umhos/cm 1.36% 5 <br /> Solids,Total Dissolved 2540CE 02/09/2024:201570CTL Blank mg/L ND <20 <br /> LCS mg/L 992.0 103% 90-110 <br /> (STK2431899-001) Dup mg/L 3.25% 5 <br /> (STK2431899-001) Dup mg/L 0.1% 5 <br /> Chloride 300.0 02/08/2024:201618LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 98.1% 90-110 <br /> MS mg/L 50.00 98.5% 67-117 <br /> (STK2431813-001) MSD mg/L 50.00 98.5% 67-117 <br /> MSRPD mg/L 0.1% <_7 <br /> MS mg/L 50.00 98.4% 67-117 <br /> (STK2431813-002) MSD mg/L 50.00 98.6% 67-117 <br /> MSRPD mg/L 0.2% :57 <br /> Fluoride 300.0 02/08/2024:201618LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 98.0% 90-110 <br /> MS mg/L 5.000 100% 89-111 <br /> (STK2431813-001) MSD mg/L 5.000 100% 89-111 <br /> MSRPD mg/L 0.1% :59 <br /> MS mg/L 5.000 100% 89-111 <br /> (STK2431813-002) MSD mg/L 5.000 100% 89-111 <br /> MSRPD mg/L 0.1% :59 <br /> Nitrate 300.0 02/08/2024:20161BLDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 96.5% 90-110 <br /> MS mg/L 40.00 98.2% 86-112 <br /> (STK2431813-001) MSD mg/L 40.00 98.2% 86-112 <br /> MSRPD mg/L 0.0% :57 <br /> MS mg/L 40.00 98.5% 86-112 <br /> (STK2431813-002) MSD mg/L 40.00 98.6% 86-112 <br /> MSRPD mg/L 0.1% <_7 <br /> Nitrate+Nitrite as N 300.0 02/08/2024:201618LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 96.5% 90-110 <br /> MS mg/L 40.00 98.2% 86-112 <br /> (STK2431813-001) MSD mg/L 40.00 98.2% 86-112 <br /> MSRPD mg/L 0.0% :57 <br /> MS mg/L 40.00 98.5% 86-112 <br /> (STK2431813-002) MSD mg/L 40.00 98.6% 86-112 <br /> MSRPD mg/L 0.1% <_7 <br /> Nitrate Nitrogen 300.0 02/08/2024:201618LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 96.5% 90-110 <br /> MS mg/L 40.00 98.2% 86-112 <br /> (STK2431813-001) MSD mg/L 40.00 98.2% 86-112 <br /> MSRPD mg/L 0.0% :57 <br /> MS mg/L 40.00 98.5% 86-112 <br /> (STK2431813-002) MSD mg/L 40.00 98.6% 86-112 <br /> MSRPD mg/L 0.1% :57 <br /> Nitrite as Nitrogen 300.0 02/08/2024:201618LDM Blank mg/L ND <0.4 <br /> LCS mg/L 15.00 99.6% 90-110 <br /> MS mg/L 30.00 101% 88-111 <br /> Page 7 of 8 Page 7 of 8 <br />