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COLUMBIA ANALYTICAL,SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc Service Request: L060077 <br /> Project: North County Landfill,San Joaquin County/791288 Date Extracted: 05/19/2006 <br /> Sample Matrix: Water Date Analyzed: .05/19/20 <br /> r <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 <br /> Lab Control Sample <br /> LWG0601108-3 <br /> Lab Control Spike <br /> %Rec <br /> Analyte Name Result Expected %Rec Limits <br /> Carbon Disulfide 20.4 20.0 102 63-122 <br /> Carbon Tetrachloride 11.3 10.0 113 66-139 <br /> Chlorobenzene 9.96 10.0 100 79-122 <br /> Chloroethane 10.8 10.0 108 65-134 <br /> Chloroform 9.45 10.0 95 78-131 <br /> Chloromethane 8.94 10.0 89 62-132 <br /> cis-1,2-Dichloroethene 10.4 10.0 104 78-123 <br /> cis-1,3-Dichloropropene 10.5 10.0 105 76-131 <br /> Dibromochloromethane 11.1 10.0 111 72-138 <br /> Dibromomethane 10.1 10.0 101 77-128 <br /> Dichlorodifluoromethane 10.7 10.0 107 51-149 <br /> Diisopropyl Ether 17.8 20.0 89 70-131 <br /> Ethanol 534 400 133 55-152 <br /> Ethylbenzene 9.82 10.0 98 80-123 <br /> Hexachlorobutadiene 9.27 10:0 93 69-137 <br /> Iodomethane 22.4 20.0 112 48-145 <br /> Isopropylbenzene 8.89 10.0 89 74-125 <br /> Total Xylenes 28.0 30.0 93 78-128 <br /> Methyl tert-Butyl Ether 19.8 20.0 99 68-130 <br /> Methylene Chloride 9.98 10.0 100 77-124 <br /> n-Butylbenzene 7.89 10.0 79 74-128 <br /> n-Propylbenzene 9.43 10.0 94 75-132 <br /> Naphthalene 8.53 10.0 85 72-135 <br /> sec-Butylbenzene 9.31 10.0 93 74-126 <br /> Styrene 9.61 10.0 96 79-130 <br /> tert-Amyl Methyl Ether 19.2 20.0 96 74-135 <br /> tert-Butyl Alcohol 245 200 123 74-134 <br /> tert-Butyl Ethyl Ether 19.8 20.0 99 72-127 <br /> tert-Butylbenzene 10.2 10.0 102 75-129 <br /> Tetrachloroethene(PCE) 11.2 10.0 112 74-124 <br /> Toluene 10.1 10.0 101 78-125 <br /> trans-l,2-Dichloroethene 10.4 10.0 104 73-117 <br /> trans-l,3-Dichloropropene 10.3 10.0 103 71-137 <br /> trans-l,4-Dichloro-2-butene 23.1 20.0 115 42-150 <br /> Trichloroethene(TCE) 10.1 10.0 101 73-119 <br /> Trichlorofluoromethane 9.41 10.0 94 60-141 <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 /> 30 <br /> Printed- tz.ct.to „----_ <br />