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COLUMBIA ANALYTICAL SERVICES, INC. <br />QA/QC Report <br />Client: Shaw Environmental & Infrastructure, Inc <br />Project: Foothill Landfill, San Joaquin County/124591 (Ground Water) <br />Sample Matrix: Water <br />Lab Control Spike Summary <br />Volatile Organic Compounds <br />Extraction Method: EPA 5030B <br />Analysis Method: 8260B <br />Lab Control Sample <br />PWG0701113-3 <br />Lab Control Spike %Rec <br />Analyte Name Result Expected %Rec Limits <br />1,1,1,2 -Tetrachloroethane <br />12.3 <br />10.0 <br />123 * <br />88-118 <br />1,1,1 -Trichloroethane (TCA) <br />10.6 <br />10.0 <br />106 <br />83-120 <br />1,1,2,2 -Tetrachloroethane <br />8.89 <br />10.0 <br />89 <br />81-120 <br />1,1,2 -Trichloroethane <br />9.94 <br />10.0 <br />99 <br />86-118 <br />1, 1,2-Trichlorotrifl uoroethane <br />11.0 <br />10.0 <br />110 <br />76-143 <br />1,1-Dichloroethane <br />9.02 <br />10.0 <br />90 <br />82-123 <br />1,1-Dichloroethene <br />9.62 <br />10.0 <br />96 <br />81-125 <br />1, 1 -Dichloropropene <br />8.80 <br />10.0 <br />88 <br />71-113 <br />1,2,3-Trichlorobenzene <br />11.5 <br />10.0 <br />115 <br />60-128 <br />1,2,3-Trichloropropane <br />9.27 <br />10.0 <br />93 <br />78-119 <br />1,2,4-Trichlorobenzene <br />11.1 <br />10.0 <br />111 <br />71-125 <br />1,2,4-Trimethylbenzene <br />8.98 <br />10.0 <br />90 <br />87-115 <br />1,2-Dibromo-3-chloropropane <br />18.5 <br />20.0 <br />93 <br />60-125 <br />1,2-Dibromoethane (EDB) <br />10.1 <br />10.0 <br />101 <br />83-115 <br />1,2 -Dichlorobenzene <br />10.2 <br />10.0 <br />102 <br />88-117 <br />1,2-Dichloroethane (EDC) <br />9.06 <br />10.0 <br />91 <br />84-125 <br />1,2-Dichloropropane <br />9.08 <br />10.0 <br />91 <br />77-127 <br />1,3,5-Trimethylbenzene <br />8.72 <br />10.0 <br />87 <br />85-115 <br />1.3 -Dichlorobenzene <br />9.93 <br />10.0 <br />99 <br />83-124 <br />113-Dichloropropane <br />9.18 <br />10.0 <br />92 <br />83-114 <br />1,4 -Dichlorobenzene <br />9.82 <br />10.0 <br />98 <br />87-118 <br />2,2-Dichloropropane <br />10.2 <br />10.0 <br />102 <br />85-129 <br />2-Butanone (MEK) <br />45.9 <br />50.0 <br />92 <br />71-125 <br />2-Chlorotoluene <br />8.60 <br />10.0 <br />86 <br />82-116 <br />2-Hexanone <br />46.3 <br />50.0 <br />93 <br />69-123 <br />4-Chlorotoluene <br />8.25 <br />10.0 <br />83 <br />79-115 <br />4-Isopropyltoluene <br />9.57 <br />10.0 <br />96 <br />77-119 <br />4-Methyl-2-pentanone (MIBK) <br />46.3 <br />50.0 <br />93 <br />71-128 <br />Acetone <br />43.8 <br />50.0 <br />88 <br />71-122 <br />Acrylonitrile <br />19.2 <br />20.0 <br />96 <br />78-124 <br />Benzene <br />9.29 <br />10.0 <br />93 <br />83-123 <br />Bromobenzene <br />10.4 <br />10.0 <br />104 <br />85-117 <br />Bromochloromethane <br />10.6 <br />10.0 <br />106 <br />83-128 <br />Bromodichloromethane <br />10.9 <br />10.0 <br />109 <br />88-122 <br />Bromoform <br />16.1 <br />10.0 <br />161 * <br />82-129 <br />Bromomethane <br />13.3 <br />10.0 <br />133 <br />75-146 <br />Service Request: P0700685 <br />Date Extracted: 07/30/2007 <br />Date Analyzed: 07/30/2007 <br />'J <br />I <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 />28 <br />Printed: 08/06/2007 08:43:57 Form 3C - Organic <br />P;\STEALTH\CRYSTAL.RPT\Fornr3LCS.rpt SuperSet Reference: RR.13800 <br />Page 1 of 2 1 <br />n <br />Units: <br />ug/L <br />Basis: <br />NA <br />Level: <br />Low <br />Extraction Lot: <br />PWG0701113 <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 />28 <br />Printed: 08/06/2007 08:43:57 Form 3C - Organic <br />P;\STEALTH\CRYSTAL.RPT\Fornr3LCS.rpt SuperSet Reference: RR.13800 <br />Page 1 of 2 1 <br />n <br />