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Southland Technical Services, Inc. <br /> Environmental Laboratories <br /> 02-06-2004 <br /> EPA 8260B <br /> Batch QA/QC Report <br /> Client Blakely Environmental Investigations, Inc Lab Job No BL401138 <br /> Project Frontier <br /> Matrix Soil Lab Sample ID BL401138-17 <br /> Batch No 0131-VOCS Date Analyzed 01-31-2004 CPO, <br /> L MS/MSD Report <br /> Unit- ppb <br /> Compound Sample Spike MS MSD MS MSD % RPD %RPD %Rec <br /> P P P <br />' Conc Conc %Rec %Rec Accept Accept <br /> Limit Limit <br /> Ij- ND 20 230 187 1150 93 5 206 30 70-130 <br />' Dichloroethene <br /> Benzene ND 20 191 204 95 5 1020 6 6 30 70-130 <br />' • Tnehloro- ND 20 252 21 9 1260 1095 14 0 30 70-130 <br /> ethene <br /> Toluene ND 20 174 192 870 960 9 8 30 70-130 <br /> Chlorobenzene ND 20 206 21 1 1030 1055 2 4 30 1 70-130 <br /> IL LCS Resent <br /> Unit: ppb <br />' Analyte LCS Value True Value Recr% Accept Limit <br />' 1,1-Dichloroethene 23 3 200 1165 80-120 <br /> Benzene 21 9 200 1095 80-120 <br />' Trichloro-ethene 222 200 1110 80-120 <br /> Toluene 202 200 1010 80-120 <br />' Chlorobenzene 200 200 1000 80-120 <br />' ND Not Detected <br /> 7801 Telegraph Road Suite L, Montebello, CA 90640 17 Phone (323) 888-0728 Fax (323) 888-1509 <br />