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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc Service Request: L0600776 <br /> Project: North County Landfill,San Joaquin County/791288 Date Extracted: 05/19/2006 <br /> Sample Matrix: Water Date Analyzed: 05/19/2006 <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: LWG060110 <br /> Lab Control Sample <br /> LWG0601108-3 <br /> Lab Control Spike <br /> %Rec <br /> Analyte Name Result Expected %Rec Limits <br /> 1,1,1,2-Tetrachloroethane 10.8 10.0 108 74-134 <br /> 1,1,1-Trichloroethane(TCA) 9.50 10.0 95 70-131 <br /> 1,1,2,2-Tetrachloroethane 10.3 10.0 103 72-135 <br /> 1,1,2-Trichloroethane 9.73 10.0 97 79-128 <br /> 1,1,2-Trichlorotrifluoroethane 12.9 10.0 129 59-141 <br /> 1,1-Dichloroethane 10.7 10.0 107 76-122 <br /> 1,1-Dichloroethene 10.2 10.0 102 64-135 <br /> '1,1-Dichloropropene 9.81 10.0 98 71-117 <br /> 1 1,2,3-Trichlorobenzene 7.76 10.0 78 78-128 <br /> 1,2,3-Trichloropropane 10.8 10.0 108 71-131 <br /> 1,2,4-Trichlorobenzene 7.78 10.0 78 76-127 <br /> 1,2,4-Trimethylbenzene 8.85 10.0 89 78-129 <br /> 1,2-Dibromo-3-chloropropane 20.6 20.0 103. 64-137 <br /> 1,2-Dibromoethane(EDB) 10.1 10.0 101 77-129 <br /> 1,2-Dichlorobenzene 10.6 10.0 106 77-127 <br /> 1 1,2-Dichloroethane(EDC) 11.3 10.0 113 68-133 <br /> 1,2-Dichloropropane 10.0 10.0 100 77-122 <br /> 1,3,5-Trimethylbenzene 9.37 10.0 94 76-129 <br /> 1,3-Dichlorobenzene 10.6 10.0 106 75-130 <br /> 1,3-Dichloropropane 9.46 10.0 95 76-127 <br /> 1,4-Dichlorobenzene 10.5 10.0 105 77-124 <br /> 2,2-Dichloropropane 11.2 10.0 112 64-141 <br /> 2-Butanone(MEK) 43.7 50.0 87 65-133 <br /> 2-Chlorotoluene 9.65 10.0 97 74-129 <br /> 2-Hexanone 45.8 50.0 92 70-128 <br /> 4-Chlorotoluene 9.27 10.0 93 73-128 <br /> 4-Isopropyltoluene 9.48 10.0 1 95 75-129 <br /> 4-Methyl-2-pentanone(MIBK) 46.2 50.0 92 66-132 <br /> Acetone 44.5 50.0 89 59-134 <br /> Acrylonitrile 19.1 20.0 96 74-134 <br /> Benzene 8.83 10.0 88 77-122 <br /> Bromobenzene 11.7 10.0 117 80-126 <br /> Bromochloromethane 11.8 10.0 118 78-125 <br /> Bromodichloromethane 9.84 10.0 98 76-133 <br /> Bromoform 9.34 10.0 93 69-145 <br /> Bromomethane 13.3 10.0 133 46-148 <br /> Results flagged with an asterisk(k)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 /> 29 <br /> PrintM- <br />