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WG2596499 QUALITY CONTROL SUMMARY Volatile Organic Compounds (GC/MS) by Method 8260D L1895603-02 Method Blank (MB) (MB)R4272205-3 09/10/2514:12 Ed MB Result MB Qualifier MB MDL MB RDL PC Analyte mgA mg/I mg/1 Benzene U 0.0167 0.0500 Carbon tetrachloride U 0.0167 0.0500 FS Chlorobenzene U 0.0167 0.0500 Chloroform U 0.0833 0.250 Rn 1,2-Dichloroethane U 0.0167 0.0500 1,1-Dichloroethene U 0.0167 0.0500 2-Butanone(MEK) U 0.167 0.500 FSr Tetrachloroethene U 0.0167 0.0500 Trichloroethene U 0.0167 0.0500 Vinyl chloride U 0.0167 0.0500 (S)Toluene-d8 103 80.0-120 (S)4-Bromofluorobenzene 95.9 77.0-126 G l (S)1,2-Dichloroethane-d4 95.1 70.0-130 [Al Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS)R4272205-1 09/10/2513:05•(LCSD)R4272205-2 09/10/2513:27 Fc Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec.Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte mg/I mg/I mg/I % % % % % Benzene 0.0250 0.0219 0.0223 87.6 89.2 70.0-123 1.81 20 Carbon tetrachloride 0.0250 0.0200 0.0205 80.0 82.0 68.0-126 2.47 20 Chlorobenzene 0.0250 0.0235 0.0241 94.0 96.4 80.0-121 2.52 20 Chloroform 0.0250 0.0230 0.0230 92.0 92.0 73.0-120 0.000 20 1,2-Dichloroethane 0.0250 0.0217 0.0222 86.8 88.8 70.0-128 2.28 20 1,1-Dichloroethene 0.0250 0.0182 0.0190 72.8 76.0 71.0-124 4.30 20 2-Butanone(MEK) 0.125 0.110 0.114 88.0 91.2 44.0-160 3.57 20 Tetrachloroethene 0.0250 0.0229 0.0238 91.6 95.2 72.0-132 3.85 20 Trichloroethene 0.0250 0.0212 0.0219 84.8 87.6 78.0-124 3.25 20 Vinyl chloride 0.0250 0.0213 0.0213 85.2 85.2 67.0-131 0.000 20 (S)Toluene-d8 99.6 100 80.0-120 (S)4-Bromofluorobenzene 102 99.3 77.0-126 (S)1,2-Dichloroethane-d4 99.5 97.8 70.0-130 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: UniFirst Corporation-Wilmington,MA UNIFIRST 370-CA L1895603 09/23/25 10:16 33 of 53