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COLUMBIA ANALYTICAL SERVICES, INC. <br />QA/QC Report <br />Client: Shaw Environmental & Infrastructure, Inc Service Request: P0700704 <br />Project: Foothill Landfill, San Joaquin County (New Wells)/] 24591 Date Extracted: 08/08/2007 <br />Sample Matrix: Water Date Analyzed: 08/08/2007 <br />Extraction Method: EPA 5030B <br />Analysis Method: 8260B <br />Lab Control Spike Summary <br />Volatile Organic Compounds <br />Lab Control Sample <br />PWG0701151-3 <br />Lab Control Spike <br />%Rec <br />Analyte Name Result Expected %Rec Limits <br />Units: <br />Basis: <br />Level: <br />Extraction Lot: <br />ug/L <br />NA <br />Low <br />PWG0701151 <br />Bromodichloromethane <br />8.71 <br />10.0 <br />87 * <br />88-122 <br />Bromoform <br />9.25 <br />10.0 <br />93 <br />82-129 <br />Bromornethane <br />7.47 <br />10.0 <br />75 <br />75-146 <br />Carbon Disulfide <br />15.3 <br />20.0 <br />77 <br />62-116 <br />Carbon Tetrachloride <br />7.03 <br />10.0 <br />70 * <br />80-125 <br />Chlorobenzene <br />9.69 <br />10.0 <br />97 <br />84-117 <br />Chloroethane <br />7.70 <br />10.0 <br />77 <br />75-133 <br />Chloroform <br />8.91 <br />10.0 <br />89 <br />88-120 <br />Chloromethane <br />8.00 <br />10.0 <br />80 <br />73-136 <br />Chloroprene <br />22.1 <br />20.0 <br />111 <br />50-150 <br />cis-1,2-Dichloroethene <br />8.63 <br />10.0 <br />86 <br />83-125 <br />cis-1,3-Dichioropropene <br />9.32 <br />10.0 <br />93 <br />86-126 <br />cis-1,4-Dichloro-2-butene <br />21.0 <br />20.0 <br />105 <br />50-150 <br />Dibromochloromethane <br />9.06 <br />10.0 <br />91 <br />87-120 <br />Dibromomethane <br />9.54 <br />10.0 <br />95 <br />85-122 <br />Dichlorodifluoromethane <br />7.68 <br />10.0 <br />77 <br />43-151 <br />Diisopropyl Ether <br />19.3 <br />20.0 <br />96 <br />79-126 <br />Ethanol <br />359 <br />400 <br />90 <br />57-153 <br />Ethyl Methacrylate <br />19.8 <br />20.0 <br />99 <br />50-150 <br />Ethylbenzene <br />8.97 <br />10.0 <br />90 <br />79-116 <br />Hexachlorobutadiene <br />8.84 <br />10.0 <br />88 <br />68-137 <br />Iodornethane <br />18.1 <br />20.0 <br />91 <br />76-122 <br />Isobutyl Alcohol <br />409 <br />400 <br />102 <br />50-150 <br />IsopropyIbenzene <br />8.46 <br />10.0 <br />85 <br />77-112 <br />Total Xylenes <br />26.7 <br />30.0 <br />89 <br />82-113 <br />MethacryIonitrile <br />195 <br />200 <br />97 <br />50-150 <br />Methyl Methacrylate <br />20.1 <br />20.0 <br />101 <br />50-150 <br />Methyl tert-Butyl Ether <br />17.9 <br />20.0 <br />89 <br />83-127 <br />Methylene Chloride <br />9.91 <br />10.0 <br />99 <br />85-130 <br />n-Butylbenzene <br />7.93 <br />10.0 <br />79 <br />76-115 <br />n-Propylbenzene <br />8.23 <br />10.0 <br />82 <br />79-117 <br />Naphthalene <br />9.39 <br />10.0 <br />94 <br />62-135 <br />Propionitrile <br />201 <br />200 <br />100 <br />50-150 <br />sec-Butylbenzene <br />7.67 <br />10.0 <br />77 <br />75-112 <br />Styrene <br />8.41 <br />10.0 <br />84 <br />84-119 <br />tert-Amyl Methyl Ether <br />19.8 <br />20.0 <br />99 <br />84-131 <br />Results nagged with an asterisk (*) indicate values outside control criteria. <br />Percent recoveries and relative percent differences (RPD) are determined by die software usin1 <br />6s in the calculation which have not been rounded. <br />Printed: 08/15/2007 07:41:23 Form 3C - Organic Page 2 of 3 <br />P:`STEALTHICRYSTAL.RPT,Form3LCS.rpt SuperSet Reference: RRI3820 <br />