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cbCurtis &Tompkins Ltd <br /> Batch QC Report <br /> Purao- 10 Ori' i#8 by, OC MM <br /> Lab # 172884 Location SDHR-Carando <br /> Client Treadwell & Rollo Prep EPA 5030B <br /> Project# 2597 10 Analysis EPA 624 <br /> Matrix Water Batch# 92130 <br /> Units ug/L Analyzed 06/21/04 <br /> Diln Fac 1 000 <br /> Type BS Lab ID QC254846 <br /> Op ed tanc <br /> 1,1-Dichloroethene 25 00 21 45 86 76-120 <br /> Benzene 25 00 23 94 96 80-120 <br /> Trichloroethene 25 00 23 79 95 80-120 <br /> Toluene 25 00 23 08 92 80-120 <br /> Chlorobenzene 25 00 23 71 95 80-120 <br /> Rurrogato Unc LAntit0 <br /> Dibromofluoromethane 99 80-120 <br /> 1,2-Dichloroethane-d4 100 80-124 <br /> Toluene-d8 99 80-120 <br /> Bromofluorobenzene 105 60-120 <br /> Type BSD Lab ID QC254847 <br /> oSult ► RPI <br /> 1,1-Dichloroethene 25 00 23 00 92 76-120 7 20 <br /> Benzene 25 00 24 67 99 80-120 3 20 <br /> Trichloroethene 25 00 24 81 99 80-120 4 20 <br /> Toluene 25 00 24 14 97 80-120 4 20 <br /> Chlorobenzene 25 00 24 20 97 80-120 2 20 <br /> atm use 1413aii <br /> Dibromofluoromethane 99 80-120 <br /> 1,2-Dichloroethane-d4 101 80-124 <br /> Toluene-d8 100 80-120 <br /> Bromofluorobenzene 104 80-120 <br /> RPD= Relative Percent Difference , <br /> Page 1 of l <br /> 19 �' <br />