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June 10, 2025 Lab No. : STK2537025 Luhdorff& Scalmanini Consulting Customer No. : 3012023 Quality Control -Wet Chem (SP 2508929-001) MSD mg/L 50.00 99.2% 67-117 MSRPD mg/L 0.1% <_7 MS mg/L 50.00 101% 67-117 (SP 2508471-001) MSD mg/L 50.00 100% 67-117 MSRPD mg/L 0.2% :57 Fluoride 300.0 05/20/2025:205618LDM Blank mg/L ND <0.1 LCS mg/L 2.500 106% 90-110 MS mg/L 5.000 108% 89-111 (STK2536976-001) MSD mg/L 5.000 109% 89-111 MSRPD mg/L 0.3% 159 MS mg/L 5.000 107% 89-111 (CH 2574334-001) MSD mg/L 5.000 107% 89-111 MSRPD mg/L 0.6% :59 300.0 05/23/2025:205706LDM Blank mg/L ND <0.1 LCS mg/L 2.500 106% 90-110 MS mg/L 5.000 105% 89-111 (CH 2574510-001) MSD mg/L 5.000 107% 89-111 MSRPD mg/L 2.0% :59 MS mg/L 5.000 108% 89-111 (STK2537324-001) MSD mg/L 5.000 108% 89-111 MSRPD mg/L 0.0% :59 300.0 06/04/2025:20611OLDM Blank mg/L ND <0.1 LCS mg/L 2.500 106% 90-110 MS mg/L 5.000 102% 89-111 (SP 2508929-001) MSD mg/L 5.000 102% 89-111 MSRPD mg/L 0.4% <_9 MS mg/L 5.000 106% 89-111 (SP 2508471-001) MSD mg/L 5.000 106% 89-111 MSRPD mg/L 0.3% 159 Sulfate 300.0 05/20/2025:205618LDM Blank mg/L ND <0.5 LCS mg/L 50.00 105% 90-110 MS mg/L 100.0 104% 18-165 (STK2536976-001) MSD mg/L 100.0 104% 18-165 MSRPD mg/L 0.1% :57 MS mg/L 100.0 104% 18-165 (CH 2574334-001) MSD mg/L 100.0 104% 18-165 MSRPD mg/L 0.2% :57 300.0 05/23/2025:205706LDM Blank mg/L ND <0.5 LCS mg/L 50.00 106% 90-110 MS mg/L 100.0 106% 18-165 (CH 2574510-001) MSD mg/L 100.0 106% 18-165 MSRPD mg/L 0.1% :57 MS mg/L 100.0 103% 18-165 (STK2537324-001) MSD mg/L 100.0 103% 18-165 MSRPD mg/L 0.3% :57 300.0 06/04/2025:20611OLDM Blank mg/L ND <0.5 LCS mg/L 50.00 105% 90-110 MS mg/L 100.0 98.2% 18-165 (SP 2508929-001) MSD mg/L 100.0 98.4% 18-165 MSRPD mg/L 0.2% :57 MS mg/L 100.0 104% 18-165 Page 19 of 21 Page 19 of 21