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WG2597222 QUALITY CONTROL SUMMARY <br /> Wet Chemistry by Method 9034/9030B L1895603-01 <br /> Method Blank (MB) <br /> (MB)R4271665-1 09/10/25 23:01 C p <br /> MB Result MB Qualifier MB MDL MB RDL z <br /> Analyte mg/kg mg/kg mg/kg TC <br /> Sulfide U 28.1 75.0 <br /> 3 <br /> qS <br /> Laboratory Control Sample (LCS) <br /> (LCS)R4271665-2 09/10/25 23:01 Rn <br /> Spike Amount LCS Result LCS Rec. —Rec.Limits LCS Qualifier <br /> Analyte mg/kg mg/kg % % SSr] <br /> Sulfide 100 89.1 89.1 42.0-123 <br /> �GI <br /> $AI <br /> Fc] <br /> ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: <br /> UniFirst Corporation-Wilmington,MA UNIFIRST 370-CA L1895603 09/23/25 10:16 15 of 53 <br />