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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc Service Request: L060071 <br /> Project: North County Landfill,San Joaquin County/791288 Date Extracted: 05/22/2006 <br /> Sample Matrix: Water Date Analyzed: 05/22/20 <br /> V <br /> Lab Control Spike Summary <br /> Volatile Organic Compounds <br /> Extraction Method: EPA 5030B Units: ug/L <br /> Analysis Method: 8260B Basis: NA <br /> Level: Low <br /> Extraction Lot: LWG060 1 <br /> Lab Control Sample <br /> LWG0601112-3 <br /> Lab Control Spike <br /> %Ret <br /> Analyte Name Result Expected %Rec Limits <br /> 1,1,1,2-Tetrachloroethane 10.7 10.0 107 74-134 <br /> 1,1,1-Trichloroethane(TCA) 9.64 10.0 96 70-131 <br /> 1,1,2,2-Tetrachloroethane 10.1 10.0 101 72-135 <br /> 1,1,2-Trichloroethane 10.1 10.0 101 79-128 <br /> 1,1,2-Trichlorotrifluoroethane 13.6 10.0 136 59-141 <br /> 1,1-Dichloroethane 10.9 10.0 109 76-122 <br /> 1,1-Dichloroethene 10.3 10.0 103 64-135 <br /> '1,1-Dichloropropene 10.2 10.0 102 71-117 <br /> 1,2,3-Trichlorobenzene 7.82 10.0 78 78-128 <br /> 1,2,3-Trichloropropane 11.3 10.0 113 71-131 <br /> 1,2,4-Trichlorobenzene 7.93 10.0 79 76-127 <br /> 1,2,4-Trimethylbenzene 8.86 10.0 89 78-129 <br /> 1,2-Dibromo-3-chloropropane 20.7 20.0 103 64-137 <br /> 1,2-Dibromoethane(EDB) 10.6 10.0 106 77-129 <br /> 1,2-Dichlorobenzene 10.6 10.0 106 77-127 <br /> 1,2-Dichloroedme(EDC) 11.9 10.0 119 68-133 <br /> 1,2-Dichloropropane 10.6 10.0 106 77-122 <br /> 1,3,5-Trimethylbenzene 9.18 10.0 92 76-129 <br /> 1,3-Dichlorobenzene 10.7 10.0 107 75-130 <br /> 1,3-Dichloropropane 10.0 10.0 100 76-127 <br /> 1,4-Dichlorobenzene 10.4 10.0 104 77-124 <br /> 2,2-Dichloropropane 11.2 10.0 112 64-141 <br /> 2-Butanone(MEK) 46.3 50.0 93 65-133 <br /> 2-Chlorotoluene 9.57 10.0 96 74-129 <br /> 2-Hexanone 46.8 50.0 94 70-128 <br /> 4-Chlorotoluene 9.12 10.0 91 73-128 <br /> 4-Isopropyltoluene 9.67 10.0 97 75-129 <br /> 4-Methyl-2-pentanone(MIBK) 47.7 50.0 95 66-132 <br /> Acetone 48.3 50.0 97 59-134 <br /> Acrylonitrile 19.6 20.0 98 74-134 <br /> Benzene 9.59 10.0 96 77-122 <br /> Bromobenzene 11.5 10.0 115 80-126 <br /> Bromochloromethane 12.2 10.0 122 78-125 <br /> Bromodichloromethane 10.0 10.0 100 76-133 <br /> Bromoform 9.22 10.0 92 69-145 <br /> Bromomethane 12.8 10.0 128 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 /> 32 <br /> Printed: 05/23/2006 13:51:22 >;n, zr <br />