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COLUMBIA ANALYTICAL SERVICES, INC. <br />QA/QC Report <br />Client: Shaw Environmental & Infrastructure, Inc <br />Project: Foothill Landfall, San Joaquin County (New Wells)/124591. <br />Sample Matrix: Water <br />Lab Control Spike Summary <br />u <br />7 <br />L' <br />0 <br />u <br />n <br />11 <br />Analyte Name Result Expected %Rec Limits <br />Service Request: P0700704 <br />Date Extracted: 08/08/2007 <br />Date Analyzed: 08/08/2007 <br />Units: <br />Volatile Organic Compounds <br />Extraction Method: EPA 5030B <br />NA <br />Analysis Method: 8260B <br />Low <br />Extraction Lot: <br />Lab Control Sample <br />77 <br />PWG0701151-3 <br />1,1,2,2 -Tetrachloroethane <br />Lab Control Spike o <br />/�ltec <br />u <br />7 <br />L' <br />0 <br />u <br />n <br />11 <br />Analyte Name Result Expected %Rec Limits <br />Service Request: P0700704 <br />Date Extracted: 08/08/2007 <br />Date Analyzed: 08/08/2007 <br />Units: <br />ug/L <br />Basis: <br />NA <br />Level: <br />Low <br />Extraction Lot: <br />PWG0701151 <br />1,1,1,2 -Tetrachloroethane <br />8.94 <br />10.0 <br />89 <br />88-118 <br />1,1,1 -Trichloroethane (TCA) <br />7.71 <br />10.0 <br />77 <br />83-120 <br />1,1,2,2 -Tetrachloroethane <br />10.2 <br />10.0 <br />102 <br />81-120 <br />1,1,2 -Trichloroethane <br />10.1 <br />10.0 <br />101 <br />86-118 <br />1,1,2-Trichlorotritluoroethane <br />8.50 <br />10.0 <br />85 <br />76-143 <br />1, 1 -Dichloroethane <br />9.03 <br />10.0 <br />90 <br />82-123 <br />1,1-Dichloroethene <br />8.22 <br />10.0 <br />82 <br />81-125 <br />1,1-Dichloropropene <br />7.48 <br />10.0 <br />75 <br />71-113 <br />1,2,3-Trichlorobenzene <br />9.72 <br />10.0 <br />97 <br />60-128 <br />1,2,3-Trichloropropane <br />9.91 <br />10.0 <br />99 <br />78-119 <br />1,2,4-Trichlorobenzene <br />9.52 <br />10.0 <br />95 <br />71-1.25 <br />1,2,4-Trimethylbenzene <br />8.81 <br />10.0 <br />88 <br />87-115 <br />1,2-Dibrotno-3-chloropropane <br />16.1 <br />20.0 <br />81 <br />60-125 <br />1,2-Dibromoethane (EDB) <br />9.98 <br />10.0 <br />100 <br />83-115 <br />1,2 -Dichlorobenzene <br />9.78 <br />10.0 <br />98 <br />88-117 <br />1,2-Dichloroethane (EDC) <br />9.26 <br />10.0 <br />93 <br />84-125 <br />1,2-Dichloropropane <br />9.68 <br />10.0 <br />97 <br />77-127 <br />1,3,5-Trimethylbenzene <br />8.40 <br />10.0 <br />84 * <br />85-115 <br />1,3 -Dichlorobenzene <br />9.57 <br />10.0 <br />96 <br />83-124 <br />1,3-Dichloropropane <br />9.99 <br />10.0 <br />100 <br />83-114 <br />1,4 -Dichlorobenzene <br />9.71 <br />10.0 <br />97 <br />87-118 <br />2,2-Dichloropropane <br />8.53 <br />10.0 <br />85 <br />85-129 <br />2-Butanone (MEK) <br />55.3 <br />50.0 <br />111 <br />71-125 <br />2-Chlorotoluene <br />8.72 <br />10.0 <br />87 <br />82-116 <br />2-1-lexanone <br />52.1 <br />50.0 <br />104. <br />69-123 <br />4-Chlorotoluene <br />8.75 <br />10.0 <br />88 <br />79-115 <br />4-Isopropyltoluene <br />8.11 <br />10.0 <br />81 <br />77-119 <br />4-Methyl-2-pentanone ('v11BK) <br />51.7 <br />50.0 <br />1.03 <br />71-128 <br />Acetone <br />60.2 <br />50.0 <br />120 <br />71-122 <br />Acetonitrile <br />210 <br />200 <br />105 <br />50-150 <br />Acrolein <br />23.9 <br />40.0 <br />60 <br />7-189 <br />Acrylonitrile <br />22.8 <br />20.0 <br />114 <br />78-124 <br />Allyl Chloride <br />19.8 <br />20.0 <br />99 <br />50-150 <br />Benzene <br />9,17 <br />10.0 <br />92 <br />83-123 <br />Bromobenzene <br />9.46 <br />10.0 <br />95 <br />85-117 <br />Bromochloromethane <br />9.62 <br />10.0 <br />96 <br />83-128 <br />Results nagged with an asterisk (*) indicate values outside control criteria. <br />Percent recoveries and relative percent di:rercnces (RPD) are determined by the software using values in the calculation which have not been rounded. <br />1.9 <br />Printed: 08/15/2007 07:41:23 Form 3C - Organic Page I of 3 <br />P.',STEALTH\CRYSTAL.RP'11Porm3LCS.rpt SuperSetReference: RR13820 <br />