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COLUMBIA ANALYTICAL SERVICES, INC. <br />QA/QC Report <br />Client: <br />Shaw Environmental & Infrastructure, Inc <br />Service Request: <br />P0700115 <br />Project: <br />Foothill Landfill, San Joaquin County/791289 (Ground Water) <br />Date Extracted: <br />02/12/2007 <br />Sample Matrix: <br />Water <br />Date Analyzed: <br />02/12/2007 <br />10.0 <br />Lab Control Spike Summary <br />72-135 <br />1,1,2 -Trichloroethane <br />10.2 <br />Volatile Organic Compounds <br />102 <br />79-128 <br />Extraction Method: <br />EPA 5030B <br />Units: <br />ug/L <br />Analysis Method: <br />8260B <br />Basis: <br />NA <br />100 <br />76-122 <br />Level: <br />Low <br />10.0 <br />101 <br />Extraction Lot: <br />PWG0700304 <br />8.01 <br />Lab Control Sample <br />80 <br />71-117 <br />1,2,3-Trichlorobenzene <br />PWG0700304-3 <br />10.0 <br />91 <br />78-128 <br />Lab Control Spike %Rec <br />10.3 <br />10.0 <br />Analyte Name Result Expected %Rec Limits <br />1,1,1,2 -Tetrachloroethane <br />9.70 <br />10.0 <br />97 <br />74-134 <br />1,1,1 -Trichloroethane (TCA) <br />9.69 <br />10.0 <br />97 <br />70-131 <br />1,1,2,2 -Tetrachloroethane <br />10.1 <br />10.0 <br />101 <br />72-135 <br />1,1,2 -Trichloroethane <br />10.2 <br />10.0 <br />102 <br />79-128 <br />1,1,2-Trichlorotrifluoroethane <br />10.9 <br />10.0 <br />109 <br />59-141 <br />1,1-Dichloroethane <br />10.0 <br />10.0 <br />100 <br />76-122 <br />1, 1 -Dichloroethene <br />10.1 <br />10.0 <br />101 <br />64-135 <br />1,1-Dichloropropene <br />8.01 <br />10.0 <br />80 <br />71-117 <br />1,2,3-Trichlorobenzene <br />9.10 <br />10.0 <br />91 <br />78-128 <br />1,2,3-Trichloropropane <br />10.3 <br />10.0 <br />103 <br />71-131 <br />1,2,4-Trichlorobenzene <br />8.97 <br />10.0 <br />90 <br />76-127 <br />1,2,4-Trimethylbenzene <br />9.74 <br />10.0 <br />97 <br />78-129 <br />1,2-Dibromo-3-chloropropane <br />19.1 <br />20.0 <br />96 <br />64-137 <br />1,2-Dibromoethane (EDB) <br />9.81 <br />10.0 <br />98 <br />77-129 <br />1,2 -Dichlorobenzene <br />9.72 <br />10.0 <br />97 <br />77-127 <br />1,2-Dichloroethane (EDC) <br />9.11 <br />10.0 <br />91 <br />68-133 <br />1,2-Dichloropropane <br />9.84 <br />10.0 <br />98 <br />77-122 <br />1,3,5-Trimethylbenzene <br />9.55 <br />10.0 <br />96 <br />76-129 <br />1,3 -Dichlorobenzene <br />9.67 <br />10.0 <br />97 <br />75-130 <br />1,3-Dichloropropane <br />9.90 <br />10.0 <br />99 <br />76-127 <br />1,4 -Dichlorobenzene <br />9.62 <br />10.0 <br />96 <br />77-124 <br />2,2-Dichloropropane <br />9.61 <br />10.0 <br />96 <br />64-141 <br />2-Butanone (MEK) <br />54.0 <br />50.0 <br />108 <br />65-133 <br />2-Chlorotoluene <br />9.69 <br />10.0 <br />97 <br />74-129 <br />2-Hexanone <br />53.1 <br />50.0 <br />106 <br />70-128 <br />4-Chlorotoluene <br />9.42 <br />10.0 <br />94 <br />73-128 <br />4-Isopropyltoluene <br />9.13 <br />10.0 <br />91 <br />75-129 <br />4-Methyl-2-pentanone (MIBK) <br />50.2 <br />50.0 <br />100 <br />66-132 <br />Acetone <br />53.8 <br />50.0 <br />108 <br />59-134 <br />Acrylonitrile <br />20.5 <br />20.0 <br />103 <br />74-134 <br />Benzene <br />9.28 <br />10.0 <br />93 <br />77-122 <br />Bromobenzene <br />9.09 <br />10.0 <br />91 <br />80-126 <br />Bromochloromethane <br />9.33 <br />10.0 <br />93 <br />78-125 <br />Bromodichloromethane <br />10.1 <br />10.0 <br />101 <br />76-133 <br />Bromoform <br />12.8 <br />10.0 <br />128 <br />69-145 <br />Bromomethane <br />10.2 <br />10.0 <br />102 <br />46-148 <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 11:12:48 Form 3C - Organic Page 1 of 2 <br />P:\STEALTH\CRYSTAL.RPTTomi3LCS.rpt Superset Reference: RR13379 <br />