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WG2596492 QUALITY CONTROL SUMMARY Volatile Organic Compounds (GC/MS) by Method 8260D L1895603-01 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) C (LCS)R4272526-1 09/10/2519:03•(LCSD)R4272526-2 09/10/2519:23 p Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec.Limits LCS Qualifier LCSD Qualifier RPD RPD Limits z Analyte mg/kg mg/kg mg/kg % % % % % TC Bromoform 0.625 0.563 0.557 90.1 89.1 64.0-132 1.07 20 Bromomethane 0.625 0.876 1.16 140 186 56.0-147 J3 J4 27.9 20 FS n-Butylbenzene 0.625 0.739 0.690 118 110 68.0-135 6.86 20 sec-Butyl benzene 0.625 0.732 0.689 117 110 74.0-130 6.05 20 Rn tert-Butylbenzene 0.625 0.677 0.658 108 105 75.0-127 2.85 20 Carbon tetrachloride 0.625 0.797 0.764 128 122 66.0-128 4.23 20 Chlorobenzene 0.625 0.696 0.678 111 108 76.0-128 2.62 20 FSr Chlorodibromomethane 0.625 0.667 0.666 107 107 74.0-127 0.150 20 Chloroethane 0.625 0.627 0.685 100 110 61.0-134 8.84 20 Chloroform 0.625 0.597 0.577 95.5 92.3 72.0-123 3.41 20 Chloromethane 0.625 0.675 0.844 108 135 51.0-138 J3 22.3 20 2-Chlorotoluene 0.625 0.722 0.665 116 106 75.0-124 8.22 20 7G1 4-Chlorotoluene 0.625 0.662 0.608 106 97.3 75.0-124 8.50 20 1,2-Dibromo-3-Chloropropane 0.625 0.439 0.408 70.2 65.3 59.0-130 7.32 20 $ 1,2-Dibromoethane 0.625 0.623 0.604 99.7 96.6 74.0-128 3.10 20 AI Dibromomethane 0.625 0.597 0.638 95.5 102 75.0-122 6.64 20 1,2-Dichlorobenzene 0.625 0.726 0.657 116 105 76.0-124 9.98 20 FSC 1,3-Dichlorobenzene 0.625 0.654 0.651 105 104 76.0-125 0.460 20 1,4-Dichlorobenzene 0.625 0.672 0.644 108 103 77.0-121 4.26 20 Dichlorodifluoromethane 0.625 0.733 0.872 117 140 43.0-156 17.3 20 1,1-Dichloroethane 0.625 0.696 0.648 111 104 70.0-127 7.14 20 1,2-Dichloroethane 0.625 0.586 0.576 93.8 92.2 65.0-131 1.72 20 1,1-Dichloroethene 0.625 0.716 0.657 115 105 65.0-131 8.59 20 cis-1,2-Dichloroethene 0.625 0.660 0.652 106 104 73.0-125 1.22 20 trans-1,2-Dichloroethene 0.625 0.682 0.634 109 101 71.0-125 7.29 20 1,2-Dichloropropane 0.625 0.601 0.638 96.2 102 74.0-125 5.97 20 1,1-Dichloropropene 0.625 0.719 0.692 115 111 73.0-125 3.83 20 1,3-Dichloropropane 0.625 0.623 0.596 99.7 95.4 80.0-125 4.43 20 cis-1,3-Dichloropropene 0.625 0.602 0.633 96.3 101 76.0-127 5.02 20 trans-1,3-Dichloropropene 0.625 0.630 0.610 101 97.6 73.0-127 3.23 20 2,2-Dichloropropane 0.625 0.695 0.661 111 106 59.0-135 5.01 20 Di-isopropyl ether 0.625 0.784 0.713 125 114 60.0-136 9.49 20 Ethylbenzene 0.625 0.678 0.648 108 104 74.0-126 4.52 20 Hexachloro-1,3-butadiene 0.625 0.666 0.607 107 97.1 57.0-150 9.27 20 Isopropylbenzene 0.625 0.707 0.695 113 111 72.0-127 1.71 20 p-Isopropyltoluene 0.625 0.753 0.696 120 111 72.0-133 7.87 20 2-Butanone(MEK) 3.13 2.56 2.40 81.8 76.7 30.0-160 6.45 24 Methylene Chloride 0.625 0.674 0.633 108 101 68.0-123 6.27 20 4-Methyl-2-pentanone(MIBK) 3.13 2.96 2.82 94.6 90.1 56.0-143 4.84 20 Methyl tert-butyl ether 0.625 0.582 0.552 93.1 88.3 66.0-132 5.29 20 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: UniFirst Corporation-Wilmington,MA UNIFIRST 370-CA L1895603 09/23/25 10:16 31 of 53