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F„ <br /> Curtis &Tompkins.ltd. <br /> Batch QC Report <br /> Purgeable Organics by GC/MS <br /> Lab #: 227030 Location: DVI-Burn Pit <br /> Client: URS Corporation Prep: EPA 5030E <br /> Project#: DVI-BP Analysis: EPA 82601 <br /> Matrix: Water Batch#: 173508 <br /> Units: ug/L Analyzed: 04/07/11 <br /> Diln Fac: 1.000 <br /> Type: BS Lab ID: QC586669 ' <br /> Analyte Spiked ' Result %REC Limits <br /> 1, 1-Dichloroethene 12.50 14 .47 116 65-138 <br /> Benzene 12.50 13.70 110 80-124 <br /> Trichloroethene 12.50 13.07 105 78-122 <br /> Toluene 12.50 12.83 103 80-120 <br /> Chlorobenzene 12.50 13.03 104 80-120 <br /> Surrogate %REC Limits <br /> Dibromofluoromethane 114 80-125 <br /> 1, 2-Dichloroethane-d4 95 71-146 <br /> Toluene-d8 101 80-120 <br /> Bromofluorobenzene 105 80-120 <br /> Type: BSD Lab ID: QC586670 <br /> Analyte Spiked Result %REC Limits RPD Lim <br /> 1, 1-Dichloroethene 12.50 14.48 116 65-138 0 20 <br /> Benzene 12.50 13 .48 108 80-124 2 20 <br /> Trichloroethene 12.50 12.89 103 78-122 1 20 <br /> Toluene 12.50 13.19 106 80-120 3 20 <br /> Chlorobenzene 12.50 13.01 104 80-120 0 20 <br /> Surrogate %REC Limits ' <br /> Dibromofluoromethane 113 80-125 <br /> 1,2-Dichloroethane-d4 93 71-146 <br /> Toluene-dB 103 80-120 <br /> Bromofluorobenzene 105 80-120 <br /> r <br /> RPD= Relative Percent Difference <br /> Page 1 of 1 <br /> 28 of 69 ' <br />