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December 17, 2025 <br /> Lab No. : STK2558219 <br /> Luhdorff& Scalmanini Consulting <br /> Customer No. : 3012023 <br /> Quality Control -Wet Chem <br /> (STK2558203-001) MSD mg/L 100.0 103% 18-165 <br /> MSRPD mg/L 0.1% :57 <br /> Blank mg/L ND <0.5 <br /> LCS mg/L 50.00 108% 90-110 <br /> MS mg/L 100.0 103% 18-165 <br /> (CH 2591776-001) MSD mg/L 100.0 102% 18-165 <br /> MSRPD mg/L 0.2% <_7 <br /> MS mg/L 100.0 91.4% 18-165 <br /> (STK2558219-004) MSD mg/L 100.0 91.6% 18-165 <br /> MSRPD mg/L 0.1% <_7 <br /> 300.0 12/09/2025:213752LDM Blank mg/L ND <0.5 <br /> LCS mg/L 50.00 109% 90-110 <br /> MS mg/L 100.0 105% 18-165 <br /> (VI2548538-002) MSD mg/L 100.0 106% 18-165 <br /> MSRPD mg/L 0.4% <_7 <br /> MS mg/L 100.0 100% 18-165 <br /> (VI2548456-001) MSD mg/L 100.0 101% 18-165 <br /> MSRPD mg/L 0.4% <_7 <br /> Nitrate 4500NO3F 12/02/2025:213454MM1 Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 101% 80420 <br /> MS mg/L 5.609 101% 66-125 <br /> (STK2558215-001) MSD mg/L 5.609 99.8% 66425 <br /> MSRPD mg/L 0.3% :530.4 <br /> Nitrate+Nitrite as N 4500NO3F 12/02/2025:213454MM1 Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 101% 80420 <br /> MS mg/L 5.609 101% 66-125 <br /> (STK2558215-001) MSD mg/L 5.609 99.8% 66-125 <br /> MSRPD mg/L 0.3% :530.4 <br /> Nitrate Nitrogen 4500NO3F 12/02/2025:213454MM1 Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 101% 80-120 <br /> MS mg/L 5.609 101% 66-125 <br /> (STK2558215-001) MSD mg/L 5.609 99.8% 66-125 <br /> MSRPD mg/L 0.3% 1530.4 <br /> Nitrite as Nitrogen 4500NO3F 12/02/2025:213485MM1 Blank mg/L ND <0.2 <br /> LCS mg/L 1.218 104% 80-120 <br /> MS mg/L 0.6090 102% 50-150 <br /> (STK2558215-001) MSD mg/L 0.6090 102% 50-150 <br /> MSRPD mg/L 0.0% :530 <br /> MBAS 5540C 12/02/2025:213519MCT Blank mg/L ND <0.1 <br /> LCS mg/L 0.5000 101% 86-114 <br /> BS mg/L 0.5000 104% 86-114 <br /> BSD mg/L 0.5000 103% 86-114 <br /> BSRPD mg/L 0.8% :55 <br /> Page 16 of 17 Page 16 of 17 <br />