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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc Service Request: L06001541 <br /> Project: North County Landfill,San Joaquin County/791288(Ground Water) Date Extracted: 02/01/2006 <br /> Sample Matrix: Water Date Analyzed: 02/01/200 <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: LWG06009 <br /> Lab Control Sample <br /> LWG0600419-3 <br /> Lab Control Spike <br /> %Rec <br /> Analyte Name Result Expected %Rec Limits <br /> Carbon Disulfide 18.5 20.0 93 63-122 <br /> Carbon Tetrachloride 14.3 10.0 143 * 66-139 <br /> Chlorobenzene 10.5 10.0 105 79-122 <br /> Chloroethane 9.17 10.0 92 65-134 <br /> Chloroform 11.1 10.0 111 78-131 <br /> Chloromethane 9.76 10.0 98 62-132 <br /> cis-1,2-Dichloroethene 10.2 10.0 102 78-123 <br /> cis-1,3-Dichloropropene 12.2 10.0 122 76-131 <br /> Dibromochloromethane 13.7 10.0 137 72-138 <br /> Dibromomethane 10.7 10.0 107 77-128 <br /> Dichlorodifluoromethane 8.76 10.0 88 51-149 <br /> Diisopropyl Ether 23.6 20.0 118 70-131 <br /> Ethanol 399 400 100 55-152 <br /> Ethylbenzene 10.9 10.0 109 80-123 <br /> Hexachlorobutadiene 11.4 10.0 114 69-137 <br /> Iodomethane 20.8 20.0 104 48-145 <br /> Isopropylbenzene 10.8 10.0 108 74-125 <br /> Total Xylenes 32.3 30.0 108 78-128 <br /> Methyl tert-Butyl Ether 21.0 20.0 105 68-130 <br /> Methylene Chloride 9.73 10.0 97 77-124 <br /> n-Butylbenzene 10.7 10.0 107 74-128 <br /> n-Propylbenzene 11.5 10.0 115 75-132 <br /> Naphthalene 11.3 10.0 113 72-135 <br /> sec-Butylbenzene 10.3 10.0 103 74-126 <br /> Styrene 10.8 10.0 108 79-130 <br /> tert-Amyl Methyl Ether 22.5 20.0 113 74-135 <br /> tert-Butyl Alcohol 211 200 105 74-134 <br /> tert-Butyl Ethyl Ether 24.1 20.0 121 72-127 <br /> tert-Butylbenzene 11.2 10.0 112 75-129 <br /> Tetrachloroethene(PCE) 10.9 10.0 109 74-124 <br /> Toluene 10.5 10.0 105 78-125 <br /> trans-l,2-Dichloroethene 9.74 10.0 97 73-117 <br /> trans-l,3-Dichloropropene 13.5 10.0 135 71-137 <br /> trans-1,4-Dichloro-2-butene 25.2 20.0 126 42-150 <br /> Trichloroethene(TCE) 10.8 10.0 108 73-119 <br /> Trichlorofluoromethane 10.1 10.0 101 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 )LL in the calculation which have not been rounded. <br /> Printed: 02/02/2006 15:09:29 Form 3C-nroanir. ., <br />