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COLUMBIA ANALYTICAL SERVICES, INC. <br />QA/QC Report <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: <br />02/16/2007 11:12:48 Form 3C -Organic Page 2 of 2 <br />P:\STEALTHICRYSTAL.RPT\Fonn3LCS.rpt Superset Reference: RR13379 <br />i� <br />Client: Shaw Environmental & Infrastructure, Inc <br />Service Request: P0700115 <br />Project: Foothill Landfill, San Joaquin County/791289 (Ground Water) <br />Date Extracted: 02/12/2007 <br />Sample Matrix: Water <br />Date Analyzed: 02/12/2007 <br />Lab Control <br />Spike Summary <br />Volatile Organic Compounds <br />Extraction Method: EPA 5030B <br />Units: ug/L <br />Analysis Method: 8260B <br />Basis: NA <br />Level: Low <br />Extraction Lot: PWG0700304 <br />Lab Control Sample <br />PWG0700304-3 <br />Lab <br />Control Spike <br />%Rec <br />Analyte Name <br />Result <br />Expected <br />%Rec <br />Limits <br />Carbon Disulfide <br />18.5 <br />20.0 <br />93 <br />63-122 <br />Carbon Tetrachloride <br />10.2 <br />10.0 <br />102 <br />66-139 <br />Chlorobenzene <br />9.06 <br />10.0 <br />91 <br />79-122 <br />Chloroethane <br />10.1 <br />10.0 <br />101 <br />65-134 <br />Chloroform <br />9.98 <br />10.0 <br />100 <br />78-131 <br />Chloromethane <br />8.98 <br />10.0 <br />90 <br />62-132 <br />cis-1,2-Dichloroethene <br />9.45 <br />10.0 <br />95 <br />78-123 <br />cis-1,3-Dichloropropene <br />9.18 <br />10.0 <br />92 <br />76-131 <br />Dibromochloromethane <br />11.1 <br />10.0 <br />111 <br />72-138 <br />Dibromomethane <br />9.95 <br />10.0 <br />100 <br />77-128 <br />Dichlorodifluoromethane <br />Ethylbenzene <br />8.88 <br />8.62 <br />10.0 <br />10.0 <br />89 <br />86 <br />51-149 <br />80-123 <br />Hexachlorobutadiene <br />9.93 <br />10.0 <br />99 <br />69-137 <br />Iodomethane <br />18.2 <br />20.0 <br />91 <br />48-145 <br />Isopropylbenzene <br />8.64 <br />10.0 <br />86 <br />74-125 <br />Total Xylenes <br />26.4 <br />30.0 <br />88 <br />78-128 <br />Methyl tert-Butyl Ether <br />18.6 <br />20.0 <br />93 <br />68-130 <br />Methylene Chloride <br />n-Butylbenzene <br />10.6 <br />9.43 <br />10.0 <br />10.0 <br />106 <br />94 <br />77-124 <br />74-128 <br />n-Propylbenzene <br />9.77 <br />10.0 <br />98 <br />75-132 <br />Naphthalene <br />9.30 <br />10.0 <br />93 <br />72-135 <br />sec-Butylbenzene <br />8.89 <br />10.0 <br />89 <br />74-126 <br />Styrene <br />9.18 <br />10.0 <br />92 <br />79-130 <br />tert-Butylbenzene <br />9.11 <br />10.0 <br />91 <br />75-129 <br />Tetrachloroethene (PCE) <br />8.87 <br />10.0 <br />89 <br />74-124 <br />Toluene <br />9.14 <br />10.0 <br />91 <br />78-125 <br />trans-l,2-Dichldroethene <br />9.79 <br />10.0 <br />98 <br />73-117 <br />trans-1,3-Dichloropropene <br />9.29 <br />10.0 <br />93 <br />71-137 <br />trans-1,4-Dichloro-2-butene <br />Trichloroethene (TCE) <br />18.5 <br />9.05 <br />20.0 <br />10.0 <br />93 <br />91 <br />42-150 <br />73-119 <br />Trichlorofluoromethane <br />6.56 <br />10.0 <br />66 <br />60-141 <br />Vinyl Acetate <br />19.8 <br />20.0 <br />99 <br />77-154 <br />Vinyl Chloride <br />9.30 <br />10.0 <br />93 <br />68-134 <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: <br />02/16/2007 11:12:48 Form 3C -Organic Page 2 of 2 <br />P:\STEALTHICRYSTAL.RPT\Fonn3LCS.rpt Superset Reference: RR13379 <br />i� <br />