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WG1772736 QUALITY CONTROL SUMMARY <br />Volatile Organic Compounds (GC/MS) by Method 8260B L1427948-01 <br />Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) <br />(LCS) R3729468-1 11/11/21 <br />Analyte <br />09:54 . (LCSD) R3729468-2 <br />Spike Amount LCS Result <br />mg/kg mg/kg <br />11/11/2110:14 <br />LCSD Result <br />mg/kg <br />LCS Rec. <br />% <br />LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits <br />% <br />Naphthalene 0.125 0.110 0.115 88.0 92.0 59.0-130 4.44 20 <br />n-Propylbenzene 0.125 0.106 0.0994 84.8 79.5 74.0-126 6.43 20 <br />Styrene 0.125 0.123 0.122 98.4 97.6 72.0-127 0.816 20 <br />1,1,1,2-Tetrachloroethane 0.125 0.151 0.158 121 126 74.0-129 4.53 20 <br />1,1,2,2-Tetrachloroethane 0.125 0.0987 0.0980 79.0 78.4 68.0-128 0.712 20 <br />Tetrachloroethene 0.125 0.157 0.149 126 119 70.0-136 5.23 20 <br />Toluene 0.125 0.132 0.129 106 103 75.0-121 2.30 20 <br />1,1,2-Trichlorotrifluoroethane 0.125 0.142 0.142 114 114 61.0-139 0.000 20 <br />1,2,3-Trichlorobenzene 0.125 0.148 0.148 118 118 59.0-139 0.000 20 <br />1,2,4-Trichlorobenzene 0.125 0.168 0.181 134 145 62.0-137 J4 7.45 20 <br />1,1,1-Trichloroethane 0.125 0.152 0.153 122 122 69.0-126 0.656 20 <br />1,1,2-Trichloroethane 0.125 0.130 0.133 104 106 78.0-123 2.28 20 <br />Trichloroethene 0.125 0.147 0.146 118 117 76.0-126 0.683 20 <br />Trichlorofluoromethane 0.125 0.148 0.142 118 114 61.0-142 4.14 20 <br />1,2,3-Trichloropropane 0.125 0.0942 0.0926 75.4 74.1 67.0-129 1.71 20 <br />1,2,3-Trimethylbenzene 0.125 0.110 0.109 88.0 87.2 74.0-124 0.913 20 <br />1,2,4-Trimethylbenzene 0.125 0.112 0.110 89.6 88.0 70.0-126 1.80 20 <br />1,3,5-Trimethylbenzene 0.125 0.106 0.102 84.8 81.6 73.0-127 3.85 20 <br />Vinyl chloride 0.125 0.125 0.130 100 104 63.0-134 3.92 20 <br />Xylenes, Total 0.375 0.397 0.398 106 106 72.0-127 0.252 20 <br />(S) Toluene-d8 101 103 75.0-131 <br />(S) 4-Bromotluorobenzene 98.2 102 670-138 <br />(S)1,2-Dichloroethane-d4 96.9 102 70.0-130 <br />ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: <br />ATC - San Ramon, CA 2046504278 L1427948 11/15/2115:54 17 of 21