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December 17, 2025 Lab No. : STK2558219 <br /> Luhdorff& Scalmanini Consulting <br /> Customer No. : 3012023 <br /> Quality Control - Wet Chem <br /> (VI2548538-002) MSD mg/L 50.00 96.7% 67-117 <br /> MSRPD mg/L 0.5% <_7 <br /> MS mg/L 50.00 83.0% 67-117 <br /> (VI2548456-001) MSD mg/L 50.00 74.4% 67-117 <br /> MSRPD mg/L 3.1% <_7 <br /> Fluoride 300.0 12/03/2025:213527LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 107% 90-110 <br /> MS mg/L 5.000 110% 89-111 <br /> (SP 2520408-005) MSD mg/L 5.000 110% 89-111 <br /> MSRPD mg/L 0.2% 59 <br /> MS mg/L 5.000 106% 89-111 <br /> (SP 2520511-001) MSD mg/L 5.000 106% 89-111 <br /> MSRPD mg/L 0.0% :59 <br /> 300.0 12/08/2025:213682LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 107% 90-110 <br /> MS mg/L 5.000 106% 89-111 <br /> (VI2548587-001) MSD mg/L 5.000 106% 89-111 <br /> MSRPD mg/L 0.2% :59 <br /> MS mg/L 5.000 105% 89-111 <br /> (STK2558203-001) MSD mg/L 5.000 105% 89-111 <br /> MSRPD mg/L 0.0% :59 <br /> Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 107% 90-110 <br /> MS mg/L 5.000 106% 89-111 <br /> (CH 2591776-001) MSD mg/L 5.000 106% 89-111 <br /> MSRPD mg/L 0.1% :59 <br /> MS mg/L 5.000 105% 89-111 <br /> (STK2558219-004) MSD mg/L 5.000 106% 89-111 <br /> MSRPD mg/L 0.0% 59 <br /> 300.0 12/09/2025:213752LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 108% 90-110 <br /> MS mg/L 5.000 108% 89-111 <br /> (VI2548538-002) MSD mg/L 5.000 108% 89-111 <br /> MSRPD mg/L 0.3% :59 <br /> MS mg/L 5.000 106% 89-111 <br /> (VI2548456-001) MSD mg/L 5.000 106% 89-111 <br /> MSRPD mg/L 0.3% :59 <br /> Sulfate 300.0 12/03/2025:213527LDM Blank mg/L ND <0.5 <br /> LCS mg/L 50.00 108% 90-110 <br /> MS mg/L 100.0 109% 18-165 <br /> (SP 2520408-005) MSD mg/L 100.0 109% 18-165 <br /> MSRPD mg/L 0.1% :57 <br /> MS mg/L 100.0 89.8% 18-165 <br /> (SP 2520511-001) MSD mg/L 100.0 92.3% 18-165 <br /> MSRPD mg/L 0.8% :57 <br /> 300.0 12/08/2025:213682LDM Blank mg/L ND <0.5 <br /> LCS mg/L 50.00 107% 90-110 <br /> MS mg/L 100.0 89.7% 18-165 <br /> (VI2548587-001) MSD mg/L 100.0 89.1% 18-165 <br /> MSRPD mg/L 0.3% <_7 <br /> MS mg/L 100.0 103% 18-165 <br /> Page 15 of 17 Page 15 of 17 <br />