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WG2599664 QUALITY CONTROL SUMMARY Volatile Organic Compounds (GC/MS) by Method 8260D L1895744-01 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) C (LCS)R4274247-1 09/16/25 08:41•(LCSD)R4274247-2 09/16/25 09:00 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 0.574 0.563 91.8 90.1 64.0-132 1.93 20 Bromomethane 0.625 0.740 0.702 118 112 56.0-147 5.27 20 FS n-Butylbenzene 0.625 0.670 0.633 107 101 68.0-135 5.68 20 sec-Butyl benzene 0.625 0.681 0.630 109 101 74.0-130 7.78 20 Rn tert-Butylbenzene 0.625 0.644 0.602 103 96.3 75.0-127 6.74 20 Carbon tetrachloride 0.625 0.734 0.712 117 114 66.0-128 3.04 20 Chlorobenzene 0.625 0.606 0.574 97.0 91.8 76.0-128 5.42 20 FSr Chlorodibromomethane 0.625 0.611 0.564 97.8 90.2 74.0-127 8.00 20 Chloroethane 0.625 0.751 0.721 120 115 61.0-134 4.08 20 Chloroform 0.625 0.681 0.667 109 107 72.0-123 2.08 20 Chloromethane 0.625 0.922 0.864 148 138 51.0-138 J4 6.49 20 2-Chlorotoluene 0.625 0.670 0.632 107 101 75.0-124 5.84 20 7G1 4-Chlorotoluene 0.625 0.617 0.599 98.7 95.8 75.0-124 2.96 20 1,2-Dibromo-3-Chloropropane 0.625 0.532 0.571 85.1 91.4 59.0-130 7.07 20 $ 1,2-Dibromoethane 0.625 0.615 0.594 98.4 95.0 74.0-128 3.47 20 AI Dibromomethane 0.625 0.665 0.647 106 104 75.0-122 2.74 20 1,2-Dichlorobenzene 0.625 0.623 0.605 99.7 96.8 76.0-124 2.93 20 Fc 1,3-Dichlorobenzene 0.625 0.626 0.589 100 94.2 76.0-125 6.09 20 1,4-Dichlorobenzene 0.625 0.616 0.599 98.6 95.8 77.0-121 2.80 20 Dichlorodifluoromethane 0.625 0.754 0.727 121 116 43.0-156 3.65 20 1,1-Dichloroethane 0.625 0.764 0.744 122 119 70.0-127 2.65 20 1,2-Dichloroethane 0.625 0.734 0.739 117 118 65.0-131 0.679 20 1,1-Dichloroethene 0.625 0.754 0.724 121 116 65.0-131 4.06 20 cis-1,2-Dichloroethene 0.625 0.646 0.643 103 103 73.0-125 0.465 20 trans-1,2-Dichloroethene 0.625 0.718 0.679 115 109 71.0-125 5.58 20 1,2-Dichloropropane 0.625 0.682 0.659 109 105 74.0-125 3.43 20 1,1-Dichloropropene 0.625 0.705 0.682 113 109 73.0-125 3.32 20 1,3-Dichloropropane 0.625 0.651 0.609 104 97.4 80.0-125 6.67 20 cis-1,3-Dichloropropene 0.625 0.653 0.636 104 102 76.0-127 2.64 20 trans-1,3-Dichloropropene 0.625 0.629 0.593 101 94.9 73.0-127 5.89 20 2,2-Dichloropropane 0.625 0.888 0.839 142 134 59.0-135 E J4 E 5.67 20 Di-isopropyl ether 0.625 0.823 0.804 132 129 60.0-136 2.34 20 Ethylbenzene 0.625 0.621 0.587 99.4 93.9 74.0-126 5.63 20 Hexachloro-1,3-butadiene 0.625 0.618 0.615 98.9 98.4 57.0-150 0.487 20 Isopropylbenzene 0.625 0.613 0.580 98.1 92.8 72.0-127 5.53 20 p-Isopropyltoluene 0.625 0.661 0.622 106 99.5 72.0-133 6.08 20 2-Butanone(MEK) 3.13 3.88 4.04 124 129 30.0-160 4.04 24 Methylene Chloride 0.625 0.621 0.589 99.4 94.2 68.0-123 5.29 20 4-Methyl-2-pentanone(MIBK) 3.13 3.88 3.77 124 120 56.0-143 2.88 20 Methyl tert-butyl ether 0.625 0.664 0.639 106 102 66.0-132 3.84 20 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: UniFirst Corporation-Wilmington,MA UNIFIRST 370-CA L1895744 09/23/25 10:17 33 of 53