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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 />0 <br />Service Request: P0700685 <br />Date Extracted: 07/30/2007 <br />Date Analyzed: 07/30/2007 <br />Units: <br />ug/L <br />Lab Control Sample <br />NA <br />Level: <br />Low <br />PWG0701113-3 <br />PWG0701113 <br />Lab Control Spike <br />%Rec <br />Analyte Name <br />Result <br />Expected <br />%Rec <br />Limits <br />Carbon Disulfide <br />16.8 <br />20.0 <br />84 <br />62-116 <br />Carbon Tetrachloride <br />11.3 <br />10.0 <br />113 <br />80-125 <br />Chlorobenzene <br />9.95 <br />10.0 <br />100 <br />.84-117 <br />Chloroethane <br />12.2 <br />10.0 <br />122 <br />75-133 <br />Chloroform <br />10.2 <br />10.0 <br />102 <br />88-120 <br />Chloromethane <br />9.94 <br />10.0 <br />99 <br />73-136 <br />cis-1,2-Dichloroethene <br />9.85 <br />10.0 <br />99 <br />83-125 <br />cis-1,3-Dichloropropene <br />9.32 <br />10.0 <br />93 <br />86-126 <br />Dibromochloromethane <br />13.7 <br />10.0 <br />137 * <br />87-120 <br />Dibromomethane <br />10.0 <br />10.0 <br />100 <br />85-122 <br />Dichlorodifluoromethane <br />14.6 <br />10.0 <br />146 <br />43-151 <br />Ethylbenzene <br />9.36 <br />10.0 <br />94 <br />79-116 <br />Hexachlorobutadiene <br />12.4 <br />10.0 <br />124 <br />68-137 <br />Iodomethane <br />20.8 <br />20.0 <br />104 <br />76-122 <br />Isopropylbenzene <br />9.67 <br />10.0 <br />30.0 <br />97 <br />92 <br />77-112 <br />82-113 <br />Total Xylenes <br />27.6 <br />Methyl tert-Butyl Ether <br />17.8 <br />20.0 <br />89 <br />83-127 <br />Methylene Chloride <br />9.85 <br />10.0 <br />99 <br />85-130 <br />n-Butylbenzene <br />9.14 <br />10.0 <br />91 <br />76-115 <br />n-Propylbenzene <br />8.45 <br />10.0 <br />85 <br />79-117 <br />Naphthalene <br />11.7 <br />10.0 <br />117 <br />62-135 <br />sec-Butylbenzene <br />8.60 <br />10.0 <br />86 <br />75-112 <br />Styrene <br />8.69 <br />10.0 <br />87 <br />84-119 <br />tert-Butylbenzene <br />9.34 <br />10.0 <br />93 <br />79-116 <br />Tetrachloroethene (PCE) <br />10.5 <br />10.0 <br />105 <br />76-123 <br />Toluene <br />9.15 <br />10.0 <br />92 <br />83-115 <br />trans-1,2-Dichloroethene <br />9.20 <br />10.0 <br />92 <br />78-124 <br />trans-1,3-Dichloropropene <br />9.38 <br />10.0 <br />94 <br />82-121 <br />trans-l,4-Dichloro-2-butene <br />11.8 <br />20.0 <br />59 * <br />75-131 <br />Trichloroethene (TCE) <br />9.95 <br />10.0 <br />100 <br />78-120 <br />Trichlorofluoromethane <br />15.0 <br />10.0 <br />150 <br />45-158 <br />Vinyl Acetate <br />20.3 <br />20.0 <br />101 <br />64-163 <br />Vinyl Chloride <br />12.2 <br />10.0 <br />122 <br />68-139 <br />0 <br />Service Request: P0700685 <br />Date Extracted: 07/30/2007 <br />Date Analyzed: 07/30/2007 <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 usinvalues in the calculation which have not been rounded. <br />Printed: 08/06/2007 08:43:57 <br />P:\STEA LTIIICRY STAL.RPTTonnJ LCS.rpt <br />Form 3C - Organic Page 2 of 2 <br />SuperSetReference: RR13800 <br />