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WG1638308 QUALITY CONTROL SUMMARY Volatile Organic Compounds (GC/MS) by Method 82608 L1328467-01 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) FP1(LCS)R3634237-1 03/21/21 21:18•(LCSD)R3634237-2 03/21/2121:37 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec.Limits LCS Qualifier LCSD Qualifier RPD RPD Limits FC Analyte mg/kg mg/kg mg/kg % % % % % Naphthalene 0.125 0.0856 0.0959 68.5 76.7 59.0-130 11.3 20 n-Propylbenzene 0.125 0.121 0.114 96.8 91.2 74.0-126 5.96 20 FSS Styrene 0.125 0.110 0.108 88.0 86.4 72.0-127 1.83 20 1,1,1,2-Tetrachloroethane 0.125 0.111 0.108 88.8 86.4 74.0-129 2.74 20 rCn 1,1,2,2-Tetrachloroethane 0.125 0.129 0.129 103 103 68.0-128 0.000 20 Tetrachloroethene 0.125 0.129 0.125 103 100 70.0-136 3.15 20 Toluene 0.125 0.118 0.114 94.4 91.2 75.0-121 3.45 20 FSr 1,1,2-Trichlorotrifluoroethane 0.125 0.114 0.0972 91.2 77.8 61.0-139 15.9 20 1,2,3-Trichlorobenzene 0.125 0.0793 0.0890 63.4 71.2 59.0-139 11.5 20 1,2,4-Trichlorobenzene 0.125 0.0887 0.0931 71.0 74.5 62.0-137 4.84 20 1,1,1-Trichloroethane 0.125 0.102 0.0952 81.6 76.2 69.0-126 6.90 20 1,1,2-Trichloroethane 0.125 0.113 0.113 90.4 90.4 78.0-123 0.000 20 7G1 Trichloroethene 0.125 0.108 0.108 86.4 86.4 76.0-126 0.000 20 Trichlorofluoromethane 0.125 0.103 0.0903 82.4 72.2 61.0-142 13.1 20 1,2,3-Trichloropropane 0.125 0.128 0.137 102 110 67.0-129 6.79 20 FAI 1,2,3-Trim ethyl benzene 0.125 0.109 0.106 87.2 84.8 74.0-124 2.79 20 1,2,4-Trimethylbenzene 0.125 0.111 0.108 88.8 86.4 70.0-126 2.74 20 FSC 1,3,5-Trim ethyl benzene 0.125 0.111 0.109 88.8 87.2 73.0-127 1.82 20 Vinyl chloride 0.125 0.108 0.103 86.4 82.4 63.0-134 4.74 20 Xylenes,Total 0.375 0.347 0.325 92.5 86.7 72.0-127 6.55 20 (S)Toluene-d8 108 108 75.0-131 (S)4-Bromofluorobenzene 93.8 95.7 670-138 (S)1,2-Dich/oroethane-d4 100 103 70.0-130 L1328914-09 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS)L1328914-09 03/22/2104:02•(MS)R3634237-4 03/22/2107:12•(MSD)R3634237-5 03/22/2107:31 Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec.Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg mg/kg % % % % % Acetone 0.513 U 0.571 0.551 111 107 1 10.0-160 3.57 40 Acrylonitrile 0.513 U 0.432 0.493 84.2 96.1 1 10.0-160 13.2 40 Benzene 0.103 U 0.0843 0.0839 81.8 81.5 1 10.0-149 0.476 37 Bromobenzene 0.103 U 0.0993 0.102 96.4 99.0 1 10.0-156 2.68 38 Bromodichloromethane 0.103 U 0.0856 0.0812 83.1 78.8 1 10.0-143 5.28 37 Bromoform 0.103 U 0.0969 0.0898 94.1 87.2 1 10.0-146 7.61 36 Bromomethane 0.103 U 0.0699 0.0653 67.9 63.4 1 10.0-149 6.80 38 n-Butylbenzene 0.103 U 0.0874 0.0930 84.9 90.3 1 10.0-160 6.21 40 sec-Butyl benzene 0.103 U 0.105 0.109 102 106 1 10.0-159 3.74 39 tert-Butylbenzene 0.103 U 0.0999 0.106 97.0 103 1 10.0-156 5.93 39 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: UPRR-American Integrated Services,Inc 79023 L1328467 03/26/2111:37 19 of 32