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COLUMBIA ANALYTICAL SERVICES, INC. <br />QA/QC Report <br />Client: Shaw Environmental & Infrastructure, Inc Service Request: P0700116 <br />Project: Foothill Landfill, San Joaquin County/791289 (Leachate Module) Date Extracted: 02/13/2007 <br />Sample Matrix: Water Date Analyzed: 02/13/2007 <br />Lab Control Spike Summary <br />Volatile Organic Compounds <br />Extraction Method: EPA 5030B <br />Analysis Method: 8260B <br />Analyte Name <br />Lab Control Sample <br />PWG0700310-3 <br />Lab Control Spike <br />Result Expected %Rec <br />%Rec <br />Limits <br />Units: ug/L <br />Basis: NA <br />Level: Low <br />Extraction Lot: PWG0700310 <br />Carbon Disulfide <br />18.4 <br />20.0 <br />92 <br />63-122 <br />Carbon Tetrachloride <br />10.4 <br />10.0 <br />104 <br />66-139 <br />Chlorobenzene <br />9.29 <br />10.0 <br />93 <br />79-122 <br />Chloroethane <br />11.4 <br />10.0 <br />114 <br />65-134 <br />Chloroform <br />9.93 <br />10.0 <br />99 <br />78-131 <br />Chloromethane <br />9.28 <br />10.0 <br />93 <br />62-132 <br />cis-1,2-Dichloroethene <br />9.29 <br />10.0 <br />93 <br />78-123 <br />cis-1,3-Dichloropropene <br />9.07 <br />10.0 <br />91 <br />76-131 <br />Dibromochloromethane <br />10.6 <br />10.0 <br />106 <br />72-138 <br />Dibromomethane <br />9.82 <br />10.0 <br />98 <br />77-128 <br />Dichlorodifluoromethane <br />8.93 <br />10.0 <br />89 <br />51-149 <br />Diisopropyl Ether <br />19.2 <br />20.0 <br />96 <br />70-131 <br />Ethanol <br />461 <br />400 <br />115 <br />55-152 <br />Ethylbenzene <br />8.84 <br />10.0 <br />88 <br />80-123 <br />Hexachlorobutadiene <br />9.13 <br />10.0 <br />91 <br />69-137 <br />Iodomethane <br />18.3 <br />20.0 <br />92 <br />48-145 <br />Isopropylbenzene <br />8.59 <br />10.0 <br />86 <br />74-125 <br />Total Xylenes <br />26.8 <br />30.0 <br />89 <br />78-128 <br />Methyl tert-Butyl Ether <br />18.8 <br />20.0 <br />94 <br />68-130 <br />Methylene Chloride <br />10.7 <br />10.0 <br />107 <br />77-124 <br />n-Butylbenzene <br />8.80 <br />10.0 <br />88 <br />74-128 <br />n-Propylbenzene <br />9.96 <br />10.0 <br />100 <br />75-132 <br />Naphthalene <br />8.42 <br />10.0 <br />84 <br />72-135 <br />sec-Butylbenzene <br />8.47 <br />10.0 <br />85 <br />74-126 <br />Styrene <br />9.25 <br />10.0 <br />93 <br />79-130 <br />tert-Amyl Methyl Ether <br />18.7 <br />20.0 <br />93 <br />74-135 <br />tert-Butyl Alcohol <br />195 <br />200 <br />98 <br />74-134 <br />tert-Butyl Ethyl Ether <br />18.1 <br />20.0 <br />91 <br />72-127 <br />tert-Butylbenzene <br />8.98 <br />10.0 <br />90 <br />75-129 <br />Tetrachloroethene (PCE) <br />8.38 <br />10.0 <br />84 <br />74-124 <br />Toluene <br />9.35 <br />10.0 <br />94 <br />78-125 <br />trans-1,2-Dichloroethene <br />9.56 <br />10.0 <br />96 <br />73-117 <br />trans-1,3-Dichloropropene <br />8.85 <br />10.0 <br />89 <br />71-137 <br />trans-1,4-Dichloro-2-butene <br />17.3 <br />20.0 <br />86 <br />42-150 <br />Trichloroethene (TCE) <br />8.84 <br />10.0 <br />88 <br />73-119 <br />Trichlorofluoromethane <br />14.4 <br />10.0 <br />144 * <br />60-141 <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 />Printed: 02/16/2007 08:34:46 Form 3C - Organic Page 2 of 3 <br />P:\STEALTH\CRYSTAL.RPT\Fonn3LCS.rpt SuperSet Reference: RR13372 <br />