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WG2597509 QUALITY CONTROL SUMMARY <br /> Wet Chemistry by Method 9056A L1895744-01 <br /> Method Blank (MB) <br /> (MB)R4272466-1 09/11/2513:51 Cp <br /> MB Result MB Qualifier MB MDL MB RDL PC <br /> Analyte mg/kg mg/kg mg/kg <br /> Fluoride U 0.706 2.00 <br /> Sulfate U 8.24 50.0 FS <br /> Laboratory Control Sample (LCS) Rn <br /> (LCS)R4272466-2 09/11/2514:14 <br /> Spike Amount LCS Result LCS Rec. Rec.Limits LCS Qualifier s <br /> Sr <br /> Analyte mg/kg mg/kg % % <br /> Fluoride 20.0 18.0 90.2 80.0-120 <br /> Sulfate 200 192 96.1 80.0-120 <br /> �GI <br /> L1896590-101 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) <br /> (OS)L1896590-101 09/11/2519:34•(MS)R4272466-3 09/11/2519:51•(MSD)R4272466-4 09/11/25 20:09 $Al <br /> Spike Amount Original Result MS Result(dry) MSD Result MS Rec. MSD Rec. Dilution Rec.Limits MS Qualifier MSD Qualifier RPD RPD Limits <br /> (dry) (dry) (dry) <br /> 9 <br /> Analyte mg/kg mg/kg mg/kg mg/kg % % % % % SC <br /> Fluoride 23.6 7.99 27.0 28.9 80.9 88.7 1.04 80.0-120 6.53 15 <br /> Sulfate 236 582 801 876 92.8 124 1.04 80.0-120 J5 8.88 15 <br /> ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: <br /> UniFirst Corporation-Wilmington,MA UNIFIRST 370-CA L1895744 09/23/25 10:17 18 of 53 <br />