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June 10, 2025 Lab No. : STK2537025 Luhdorff& Scalmanini Consulting Customer No. : 3012023 Quality Control -Wet Chem (SP 2508471-001) MSD mg/L 100.0 104% 18-165 MSRPD mg/L 0.1% 157 Nitrate 450ONO3F 05/15/2025:205319MM1 Blank mg/L ND <0.4 LCS mg/L 11.22 95.4% 80-120 MS mg/L 5.609 92.7% 66-125 (STK2537014-001) MSD mg/L 5.609 95.2% 66-125 MSRPD mg/L 1.3% <_30.4 Blank mg/L ND <0.4 LCS mg/L 11.22 95.7% 80-120 MS mg/L 5.609 90.4% 66-125 (STK2537015-001) MSD mg/L 5.609 89.3% 66-125 MSRPD mg/L 0.3% _<30.4 Nitrate+Nitrite as N 450ONO3F 05/15/2025:205319MM1 Blank mg/L ND <0.4 LCS mg/L 11.22 95.4% 80-120 MS mg/L 5.609 92.7% 66-125 (STK2537014-001) MSD mg/L 5.609 95.2% 66-125 MSRPD mg/L 1.3% 1530.4 Blank mg/L ND <0.4 LCS mg/L 11.22 95.7% 80-120 MS mg/L 5.609 90.4% 66-125 (STK2537015-001) MSD mg/L 5.609 89.3% 66-125 MSRPD mg/L 0.3% <_30.4 Nitrate Nitrogen 450ONO3F 05/15/2025:205319MM1 Blank mg/L ND <0.4 LCS mg/L 11.22 95.4% 80-120 MS mg/L 5.609 92.7% 66-125 (STK2537014-001) MSD mg/L 5.609 95.2% 66-125 MSRPD mg/L 1.3% :530.4 Blank mg/L ND <0.4 LCS mg/L 11.22 95.7% 80-120 MS mg/L 5.609 90.4% 66-125 (STK2537015-001) MSD mg/L 5.609 89.3% 66-125 MSRPD mg/L 0.3% :530.4 Nitrite as Nitrogen 450ONO3F 05/15/2025:205362MM1 Blank mg/L ND <0.2 LCS mg/L 1.218 100% 80-120 MS mg/L 0.6090 100% 50-150 (STK2537014-001) MSD mg/L 0.6090 102% 50-150 MSRPD mg/L 1.6% 1530 Blank mg/L ND <0.2 LCS mg/L 1.218 100% 80-120 MS mg/L 0.6090 102% 50-150 (STK2537015-001) MSD mg/L 0.6090 102% 50-150 MSRPD mg/L 0.0% 1530 MBAS 5540C 05/15/2025:205384MCT Blank mg/L ND <0.1 LCS mg/L 0.5000 95.6% 86-114 BS mg/L 0.5000 95.7% 86-114 BSD mg/L 0.5000 96.1% 86-114 BSRPD mg/L 0.4% 155 Page 20 of 21 Page 20 of 21