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WG1772127 QUALITY CONTROL SUMMARY <br />Volatile Organic Compounds (GC/MS) by Method 826013 L1427953-01,02,03,04,05,06 <br />Method Blank (MB) <br />(MB) R3729535-3 11/10/2114:20 <br />MB Result <br />Analyte mg/kg <br />MB Qualifier MB MDL MB RDL <br />mg/kg mg/kg <br />p-Isopropyltoluene u 0.00255 0.00500 <br />2-Butanone (MEK) 0.100 0.0635 0.100 <br />Methylene Chloride u 0.00664 0.0250 <br />4-Methyl-2-pentanone (M1BK) U 0.00228 0.0250 <br />Methyl tert-butyl ether U 0.000350 0.00100 <br />Naphthalene U 0.00488 0.0125 <br />n-Propylbenzene U 0.000950 0.00500 <br />Styrene U 0.000229 0.0125 <br />1,1,1,2-Tetrachloroethane U 0.000948 0.00250 <br />1,1,2,2-Tetrachloroethane U 0.000695 0.00250 <br />Tetrachloroethene U 0.000896 0.00250 <br />Toluene U 0.00130 0.00500 <br />1,1,2-Trichlorotrifluoroethane U 0.000754 0.00250 <br />1,23-Trichlorobenzene U 0.00733 0.0125 <br />1,2,4-Trichlorobenzene U 0.00440 0.0125 <br />1,1,1-Trichloroethane U 0.000923 0.00250 <br />1,1,2-Trichloroethane U 0.000597 0.00250 <br />Trichloroethene U 0.000584 0.00100 <br />Trichlorofluoro methane U 0.000827 0.00250 <br />1,2,3-Trichloropropane U 0.00162 0.0125 <br />1,2,3-Trimethylbenzene U 0.00158 0.00500 <br />1,2,4-Trimethylbenzene U 0.00158 0.00500 <br />1,3,5-Trimethylbenzene U 0.00200 0.00500 <br />Vinyl chloride u 0.00116 0.00250 <br />Xylenes, Total U 0.000880 0.00650 <br />(S) Toluene-d8 106 75.0-131 <br />(S)4-Bromofluorobenzene 99.0 670-138 <br />(S)1,2-Dichloroethane-d4 93.4 70.0-130 <br />Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) <br />(LCS) R3729535-1 11/10/2113:02 • (LCSD) R3729535-2 11/10/2113:22 <br />Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits <br />Analyte mg/kg mg/kg mg/kg % % % % % _ . <br />Acetone 0.62-5 - 0.576 0.597 92.2 95.5 10.0-160 3.58 31 <br />Acrylonitrile 0.625 0.494 0.505 79.0 80.8 45.0-153 2.20 22 <br />Benzene 0.125 0.134 0.140 107 112 70.0-123 4.38 20 <br />Bromobenzene 0.125 0.108 0.115 86.4 92.0 73.0-121 6.28 20 <br />Bromodichloromethane 0.125 0.134 0.140 107 112 73.0-121 4.38 20 <br />ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: <br />ATC - San Ramon, CA 204BS04275 L1427953 11/15/2115:55 23 of 29