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July 9, 2024 <br /> Lab No. : STK2439662 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (CH 2475595-011) Dup mg/L 0.1% 10 <br /> Bicarbonate 2320B (CH 2475595-011) Dup mg/L 0.09% 10 <br /> Carbonate 2320B (CH 2475595-011) Dup mg/L 0% 10 <br /> E.C. 2320B (CH 2475595-011) Dup umhos/cm 0.2% 5 <br /> Hydroxide 2320B (CH 2475595-011) Dup mg/L 0% 10 <br /> Solids,Total Dissolved 2540CE 07/03/2024:207376CTL Blank mg/L ND <20 <br /> LCS mg/L 990.5 99.6% 90-110 <br /> (SP 2410702-001) Dup mg/L 2.78% 5 <br /> (SP 2410702-001) Dup mg/L 3.38% 5 <br /> Chloride 300.0 07/02/2024:207420LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 104% 90-110 <br /> MS mg/L 50.00 67.6% 67-117 <br /> (STK2439515-001) MSD mg/L 50.00 69.9% 67-117 <br /> MSRPD mg/L 1.0% :57 <br /> MS mg/L 50.00 93.0% 67-117 <br /> (VI 2445263-003) MSD mg/L 50.00 93.4% 67-117 <br /> MSRPD mg/L 0.3% <_7 <br /> Fluoride 300.0 07/02/2024:207420LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 102% 90-110 <br /> MS mg/L 5.000 106% 89-111 <br /> (STK2439515-001) MSD mg/L 5.000 105% 89-111 <br /> MSRPD mg/L 1.2% :59 <br /> MS mg/L 5.000 104% 89-111 <br /> (VI 2445263-003) MSD mg/L 5.000 104% 89-111 <br /> MSRPD mg/L 0.1% :59 <br /> Nitrate 300.0 07/02/2024:207420LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 104% 90-110 <br /> MS mg/L 40.00 53.2% 86-112 435 <br /> (STK2439515-001) MSD mg/L 40.00 57.8% 86-112 435 <br /> MSRPD mg/L 1.3% :57 <br /> MS mg/L 40.00 76.1% 86-112 435 <br /> (VI 2445263-003) MSD mg/L 40.00 77.0% 86-112 435 <br /> MSRPD mg/L 0.3% :57 <br /> Nitrate+Nitrite as N 300.0 07/02/2024:207420LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 104% 90-110 <br /> MS mg/L 40.00 53.2% 86-112 435 <br /> (STK2439515-001) MSD mg/L 40.00 57.8% 86-112 435 <br /> MSRPD mg/L 1.3% :57 <br /> MS mg/L 40.00 76.1% 86-112 435 <br /> (VI 2445263-003) MSD mg/L 40.00 77.0% 86-112 435 <br /> MSRPD mg/L 0.3% :57 <br /> Nitrate Nitrogen 300.0 07/02/2024:207420LDM Blank mg/L ND <0.1 <br /> LCS mg/L 4.518 104% 90-110 <br /> MS mg/L 9.036 53.2% 86-112 435 <br /> (STK2439515-001) MSD mg/L 9.036 57.7% 86-112 435 <br /> MSRPD mg/L 1.3% :57 <br /> MS mg/L 9.036 76.1% 86-112 435 <br /> (VI 2445263-003) MSD mg/L 9.036 77.0% 86-112 435 <br /> MSRPD mg/L 0.3% :57 <br /> Nitrite as Nitrogen 300.0 07/02/2024:207420LDM Blank mg/L ND <0.1 <br /> Page 6 of 7 Page 6 of 7 <br />