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COLUMBIA ANALYTICAL SERVICES, INC. <br />QA/QC Report <br />Client: Shaw Environmental & Infrastructure, Inc Service Request: L0600992 <br />Project: Foothill Landfill/791289 (Ground Water) Date Extracted: 08/02/2006 <br />Sample Matrix: Water Date Analyzed: 08/02/2006 <br />Lab Control Spike Summary <br />Volatile Organic Compounds <br />Extraction Method: EPA 5030B Units: ug/L <br />Analysis Method: 8260B Basis: NA <br />Level: Low <br />Extraction Lot: LWG0601249 <br />Lab Control Sample <br />LWG0601249-3 <br />Lab Control Spike <br />%Rec <br />Analyte Name Result Expected %Rec Limits <br />1,1,1,2 -Tetrachloroethane <br />9.35 <br />10.0 <br />94 <br />74-134 <br />1,1,1-Trichloroethane(TCA) <br />8.39 <br />10.0 <br />84 <br />70-131 <br />1,1,2,2 -Tetrachloroethane <br />9.56 <br />10.0 <br />96 <br />72-135. <br />1,1,2 -Trichloroethane <br />9.54 <br />10.0 <br />95 <br />79-128 <br />1,1,2-Trichlorotrifluoroethane <br />7.78 <br />10.0 <br />78 <br />59-141 <br />1,1-Dichloroethane <br />9.11 <br />10.0 <br />91 <br />76-122 <br />1,1-Dichloroethene <br />8.25 <br />10.0 <br />83 <br />64-135 <br />1, 1 -Dichloropropene <br />7.50 <br />10.0 <br />75 <br />71-117 <br />1,2,3-Trichlorobenzene <br />9.05 <br />10.0 <br />91 <br />78-128 <br />1,2,3-Trichloropropane <br />9.35 <br />10.0 <br />94 <br />71-131 <br />1,2,4-Trichlorobenzene <br />8.83 <br />10.0 <br />88 <br />76-127 <br />1,2,4-Trimethylbenzene <br />8.86 <br />10.0 <br />89 <br />78-129 <br />1,2-Dibromo-3-chloropropane <br />18.7 <br />20.0 <br />94 <br />64-137 <br />1,2-Dibromoethane (EDB) <br />9.76 <br />10.0 <br />98 <br />77-129 <br />1,2 -Dichlorobenzene <br />9.40 <br />10.0 <br />94 <br />77-127 <br />1,2-Dichloroedme (EDC) <br />9.85 <br />10.0 <br />99 <br />68-133 <br />1,2-Dichloropropane <br />9.49 <br />10.0 <br />95 <br />77-122 <br />1,3,5-Trimethylbenzene <br />8.47 <br />10.0 <br />85 <br />76-129 <br />1,3 -Dichlorobenzene <br />8.97 <br />10.0 <br />90 <br />75-130 <br />1,3-Dichloropropane <br />9.47 <br />10.0 <br />95 <br />76-127 <br />1,4 -Dichlorobenzene <br />8.98 <br />10.0 <br />90 <br />77-124 <br />2,2-Dichloropropane <br />8.85 <br />10.0 <br />89 <br />64-141 <br />2-Butanone (MEK) <br />50.5 <br />50.0 <br />101 <br />65-133 <br />2-Chlorotoluene <br />8.76 <br />10.0 <br />88 <br />74-129 <br />2-Hexanone <br />52.1 <br />50.0 <br />104 <br />70-128 <br />4-Chlorotoluene <br />8.90 <br />10.0 <br />89 <br />73-128 <br />4-Isopropyltoluene <br />7.78 <br />10.0 <br />78 <br />75-129 <br />4-Methyl-2-pentanone (MIBK) <br />52.5 <br />50.0 <br />105 <br />66-132 <br />Acetone <br />50.3 <br />50.0 <br />101 <br />59-134 <br />Acrolein <br />44.5 <br />40.0 <br />111 <br />66-148 <br />Acrylonitrile <br />20.3 <br />20.0 <br />102 <br />74-134 <br />Benzene <br />9.29 <br />10.0 <br />93 <br />77-122 <br />Bromobenzene <br />9.39 <br />10.0 <br />94 <br />80-126 <br />Bromochloromethane <br />9.63 <br />10.0 <br />96 <br />78-125 <br />Bromodichloromethane <br />9.70 <br />10.0 <br />97 <br />76-133 <br />Bromoform <br />10.7 <br />10.0 <br />107 <br />69-145 <br />Results flagged with an asterisk (*) indicate values outside control criteria. <br />Percent recoveries and relative percent differences (RPD) are determined by the software using values in the calculation which have not been rounded. <br />2 <br />Printed: 08/03/2006 12:00:07 Form 3C - Organic Page I of 2 <br />P:\STEALTH\CRYSTAL.RPT1Fonn3LCS.rpt SuperSetReference: RR13028 <br />