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ACCOUNT: PROJECT: <br />ATC - San Ramon, CA 2048504278 <br />SDG: DATE/TIME: PAGE: <br />L1465194 03/03/22 17:32 23 of 35 <br />WG1823984 QUALITY CONTROL SUMMARY <br />Volatile Organic Compounds (GC/MS) by Method 8260B <br />Method Blank (MB) <br />f1465194-05,08 <br />(MB) R3764483-2 02/25/22 20:33 <br />MB Result MB Qualifier MB MDL MB RDL <br />Analyte mg/kg mg/kg mg/kg <br />p-Isopropyltoluene U 0.00255 0.00500 <br />2-Butanone (MEK) U 0.0635 0.100 <br />Methylene Chloride U 0.00664 0.0250 <br />4-Methyl-2-pentanone (MIBK) 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 />1,1,2-Trichlorotrifluoroethane U 0.000754 0.00250 <br />Tetrachloroethene U 0.000896 0.00250 <br />Toluene U 0.00130 0.00500 <br />1,2,3-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 />Trichlorofluoromethane 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 />1,3,5-Trimethylbenzene U 0.00200 0.00500 <br />Vinyl chloride U 0.00116 0.00250 <br />(S)Toluene-d8 108 75.0-131 <br />(S)4-Bromofluorobenzene 102 67.0-138 <br />(S)1,2-Dichloroethone-d4 94.6 70.0-130 <br />Laboratory Control Sample (LCS) <br />(LCS) R3764483-1 02/25/22 16:43 <br />Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier <br />Analyte mg/kg mg/kg <br />Acetone 0.625 0.774 124 10.0-160 <br />Acrylonitrile 0.625 0.683 109 45.0-153 <br />Benzene 0.125 0.119 95.2 70.0-123 <br />Bromobenzene 0.125 0.131 105 73.0-121 <br />Bromodichloromethane 0.125 0.123 98.4 73.0-121 <br />Bromoform 0.125 0.120 96.0 64.0-132 <br />Bromomethane 0.125 0.124 99.2 56.0-147