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COLUMBIA ANALY'T'ICAL SERVICES, INC. <br />QA/QC Report <br />Client: Shaw Enviromnental & Infrastructure, Inc Service Request: P0700685 <br />Project: Foothill Landfill, San Joaquin County/124591 (Ground Water) Date Extracted: 07/31/2007 <br />Sample Matrix: Water Date Analyzed: 07/31/2007 <br />P, <br />i'. <br />Results flagged with an asterisk (*) indicate values outside control criteria. <br />Results flagged with a pound (#) indicate the control criteria is not applicable. <br />Percent recoveries and relative percent differences (RPD) are determined by the software usires in the calculation which have not been rounded. <br />Printed: 08/06/2007 08:43:54 Form 3A - Organic Page 1 of 1 <br />P:\STEALTH\CRYSTAL.RPnFotm3DMS.rpt SuperSetReference: RR13800 <br />Matrix Spike/Duplicate Matrix Spike Summary <br />Volatile <br />Organic Compounds <br />Sample Name: Batch QC <br />Units: <br />ug/L <br />Lab Code: P0700699-002 <br />Basis: <br />NA <br />Extraction Method: EPA 5030B <br />Level: <br />Low <br />Analysis Method: 8260B <br />Extraction Lot: <br />PWG0701113 <br />Batch QCMS <br />Batch <br />QCDMS <br />PWG0701113-1 <br />PWG0701113-2 <br />Matrix Spike <br />Duplicate <br />Matrix Spike <br />%Rec <br />RPD <br />Analyte Name <br />Sample <br />Result <br />Result <br />Expected <br />%Rec <br />Result Expected <br />'%Rec <br />Limits <br />RPD <br />Limit <br />1,1,1-Trichloroethane(TCA) <br />ND <br />48.9 <br />50.0 <br />98 <br />46.8 <br />50.0 <br />94 <br />52-158 <br />4 <br />25 <br />1,1-Dichloroethane <br />ND <br />42.6 <br />50.0 <br />85 <br />41.2 <br />50.0 <br />82 <br />59-145 <br />3 <br />25 <br />1,1-Dichloroethene <br />2.9 <br />45.0 <br />50.0 <br />84 <br />42.9 <br />50.0 <br />80 <br />27-176 <br />5 <br />25 <br />1,2-Dichloroethane (EDC) <br />ND <br />42.9 <br />50.0 <br />86 <br />41.9 <br />50.0 <br />84 <br />56-147 <br />2 <br />25 <br />1,2-Dichloropropane <br />ND <br />43.8 <br />50.0 <br />88 <br />42.7 <br />50.0 <br />85 <br />60-139 <br />3 <br />25 <br />1,3,5-Trimethylbenzene <br />ND <br />40.2 <br />50.0 <br />80 <br />38.6 <br />45.1 <br />50.0 <br />50.0 <br />77 <br />90 <br />45-143 <br />62-134 <br />4 <br />3 <br />25 <br />25 <br />1,3 -Dichlorobenzene <br />ND <br />46.3 <br />50.0 <br />93 <br />Benzene <br />ND <br />44.7 <br />50.0 <br />89 <br />42.9 <br />50.0 <br />86 <br />58-148 <br />4 <br />25 <br />Chlorobenzene <br />ND <br />48.3 <br />50.0 <br />97 <br />46.2 <br />50.0 <br />92 <br />60-136 <br />5 <br />25 <br />Chloroform <br />ND <br />47.2 <br />50.0 <br />94 <br />46.4 <br />50.0 <br />93 <br />60-147 <br />2 <br />25 <br />Ethylbenzene <br />ND <br />44.2 <br />50.0 <br />88 <br />43.0 <br />50.0 <br />86 <br />50-142 <br />3 <br />25 <br />Methyl tert-Butyl Ether <br />ND <br />81.3 <br />100 <br />81 <br />79.2 <br />100 <br />79 <br />66-136 <br />3 <br />25 <br />Tetrachloroethene (PCE) <br />6.9 <br />55.0 <br />50.0 <br />96 <br />54.2 <br />50.0 <br />95 <br />27-168 <br />1 <br />25 <br />Toluene <br />ND <br />43.6 <br />50.0 <br />87 <br />42.2 <br />50.0 <br />84 <br />56-137 <br />3 <br />25 <br />Trichloroethene (TCE) <br />420 <br />448 <br />50.0 <br />62 # <br />423 <br />50.0 <br />13 # <br />42-156 <br />6 <br />25 <br />Vinyl Chloride <br />ND <br />56.6 <br />50.0 <br />113 <br />53.0 <br />50.0 <br />106 <br />40-177 <br />6 <br />25 <br />P, <br />i'. <br />Results flagged with an asterisk (*) indicate values outside control criteria. <br />Results flagged with a pound (#) indicate the control criteria is not applicable. <br />Percent recoveries and relative percent differences (RPD) are determined by the software usires in the calculation which have not been rounded. <br />Printed: 08/06/2007 08:43:54 Form 3A - Organic Page 1 of 1 <br />P:\STEALTH\CRYSTAL.RPnFotm3DMS.rpt SuperSetReference: RR13800 <br />