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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc Service Request: L0600154 <br /> Project: North County Landfill,San Joaquin County/791288(Ground Water <br /> Sample Matrix: Water ) Date Extracted: 02/01/2006 <br /> Date Analyzed: 02/01/2006 <br /> Lab Control Spike Summary <br /> Volatile Organic Compounds <br /> Extraction Method: EPA 5030B <br /> Analysis Method: 8260B Units: ug/L <br /> Basis: NA <br /> Level: Low <br /> Extraction Lot: LWG0600419 <br /> Lab Control Sample <br /> L WG0600419-3 <br /> Lab Control Spike <br /> % <br /> Analyte Name Result Expected %Rec Limits <br /> 1,1,1,2-Tetrachloroethane 14.1 10.0 141 * 74-134 <br /> 1,1,1-Trichloroethane(TCA) 12.6 10.0 126 70-131 <br /> 1,1,2,2-Tetrachloroethane 10.9 10.0 109 72-135 <br /> 1,1,2-Trichloroethane 10.8 10.0 108 79-128 <br /> 1,1,2-Trichlorotrifluoroethane 12.1 10.0 121 59-141 <br /> 1,1-Dichloroethane 11.0 10.0 110 76-122 <br /> 1,1-Dichloroethene 9.42 10.0 94 64-135 <br /> 1,1-Dichloropropene 10.1 10.0 101 71-117 <br /> 1,2,3-Trichlorobenzene 11.4 10.0 114 78-128 <br /> 1,2,3-Trichloropropane 11.3 10.0 113 71-131 <br /> 1,2,4-Trichlorobenzene 10.8 10.0 108 76-127 <br /> 1,2,4-Trimethylbenzene 11.3 10.0 113 78-129 <br /> 1,2-Dibromo-3-chloropropane 28.8 20.0 144 * 64-137 <br /> 1,2-Dibromoethane(EDB) 10.9 10.0 109 77-129 <br /> 1,2-Dichlorobenzene 10.7 10.0 107 77-127 <br /> 1,2-Dichloroethane(EDC) 12.1 10.0 121 68-133 <br /> 1,2-Dichloropropane 10.7 10.0 107 77-122 <br /> 1,3,5-Trimethylbenzene 11.0 10.0 110 76-129 <br /> 1,3-Dichlorobenzene 10.9 10.0 109 75-130 <br /> 1,3-Dichloropropane 10.9 10.0 109 76-127 <br /> 1,4-Dichlorobenzene 10.8 10.0 108 77-124 <br /> 2,2-Dichloropropane 15.4 10.0 154 * 64-141 <br /> 2-Butanone(MEK) 57.8 50.0 116 65-133 <br /> 2-Chlorotoluene 11.2 10.0 112 74-129 <br /> 2-Hexanone 60.3 50.0 121 70-128 <br /> 4-Chlorotoluene 10.9 10.0 109 73-128 <br /> 4-Isopropyltoluene 10.8 10.0 108 75-129 <br /> 4-Methyl-2-pentanone(MIBK) 59.7 50.0 119 66-132 <br /> Acetone 54.0 50.0 108 59-134 <br /> Acrylonitrile 21.2 20.0 106 74-134 <br /> Benzene 10.2 10.0 102 77-122 <br /> Bromobenzene 11.0 10.0 110 80-126 <br /> Bromochloromethane 9.97 10.0 100 78-125 <br /> Bromodichloromethane 12.4 10.0 124 76-133 <br /> Bromoform 13.8 10.0 138 69-145 <br /> Bromomethane 10.1 10.0 101 46-148 <br /> Results nagged with an asterisk(*)indicate values outside control criteria. <br /> Percent recoveries and relative percent differences(RPD)are determined by the software usingngls in the calculation which have not been rounded. <br /> Printed: 02/02/2006 15:09:29 <br /> Form 3C-Organic � ,. <br />