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WG1772127 QUALITY CONTROL SUMMARY Volatile Organic Compounds (GC/MS) by Method 8260B L1427953-01,02,03,04,05,06 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3729535-1 11/10/2113:02 • (LCSD) R3729535-2 11/10/2113:22 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg % % % % % Naphthalene 0.125 0.0966 0.0928 77.3 74.2 59.0-130 4.01 20 n-Propylbenzene 0.125 0.0971 0.102 77.7 81.6 74.0-126 4.92 20 Styrene 0.125 0.121 0.127 96.8 102 72.0-127 4.84 20 1,1,1,2-Tetrachloroethane 0.125 0.152 0.159 122 127 74.0-129 4.50 20 1,1,2,2-Tetrachloroethane 0.125 0.101 0.109 80.8 87.2 68.0-128 7.62 20 Tetrachloroethene 0.125 0.136 0.151 109 121 70.0-136 10.5 20 Toluene 0.125 0.128 0.136 102 109 75.0-121 6.06 20 1,1,2-Trichlorotrifluoroethane 0.125 0.113 0.115 90.4 92.0 61.0-139 1.75 20 1,2,3-Trichlorobenzene 0.125 0.122 0.110 97.6 88.0 59.0-139 10.3 20 1,2,4-Trichlorobenzene 0.125 0.148 0.141 118 113 62.0-137 4.84 20 1,1,1-Trichloroethane 0.125 0.148 0.143 118 114 69.0-126 3.44 20 1,1,2-Trichloroethane 0.125 0.138 0.145 110 116 78.0-123 4.95 20 Trichloroethene 0.125 0.142 0.144 114 115 76.0-126 1.40 20 Trichlorofluoromethane 0.125 0.122 0.122 97.6 97.6 61.0-142 0.000 20 1,2,3-Trichloropropane 0.125 0.0989 0.104 79.1 83.2 67.0-129 5.03 20 1,2,3-Trimethylbenzene 0.125 0.106 0.112 84.8 89.6 74.0-124 5.50 20 1,2,4-Trimethylbenzene 0.125 0.106 0.112 84.8 89.6 70.0-126 5.50 20 1,3,5-Trimethylbenzene 0.125 0.102 0.106 81.6 84.8 73.0-127 3.85 20 Vinyl chloride 0.125 0.123 0.125 98.4 100 63.0-134 1.61 20 Xylenes, Total 0.375 0.385 0.410 103 109 72.0-127 6.29 20 (S) Toluene-d8 101 106 75.0-131 (S)4-Bromolluorobenzene 95.8 98.9 670-138 (S)12-Dichloroelhone-d4 98.9 99.1 70.0-130 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: ATC -San Ramon, CA 204BS04278 L1427953 11/15/2115:55 25 of 29