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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QAIQC Report <br /> Client: Shaw Environmental&Infrastructure,Inc Service Request: L0600776 <br /> Project:. North County Landfill,San Joaquin County/791288 Date Extracted: 05/22/2006 <br /> Sample Matrix: Water Date Analyzed: 05/22/2006 <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: LWG06011 <br /> Lab Control Sample <br /> LWCT0601112-3 <br /> Lab Control Spike - <br /> %Rec <br /> Analyte Name Result Expected %Rec Limits <br /> Carbon Disulfide 21.6 . 20.0 108 63-122 <br /> Carbon Tetrachloride 11.8 10.0 118 66-139 <br /> Chlorobenzene. 9.93 10.0 99 79-122 <br /> Chloroethane 10.5 10.0 105 65-134 <br /> Chloroform 9.79 10.0 98 78-131 <br /> Chloromethane 9.21 10.0 92 62-132 <br /> cis-1,2-Dichloroethene 10.3 10.0 103 78-123 <br /> cis-1,3-Dichloropropene 1.0.9 10.0 109 76-131 <br /> Dibromochloromethane 11.5 10.0 115 72-138 <br /> Dibromomethane 10.6 10.0 106 77-128 <br /> Dichlorodifluoromethane 9.84 10.0 98 51-149 <br /> Diisopropyl Ether 18.6 20.0 93 70-131 <br /> Ethanol 475 400 119 55-152 <br /> Ethylbenzene 9.66 10.0 97 80-123 <br /> Hexachlorobutadiene 9.59 10.0 96 69-137 <br /> Iodomethane 24.2 20.0 121 48-145 <br /> Isopropylbenzene 9.23 10.0 92 74-125 <br /> Total Xylenes 27.7 30.0 92 78-128 <br /> Methyl tert-Butyl Ether 19.8 20.0 99 68430 <br /> Methylene Chloride 10.1 10.0 101 77-124 <br /> n-Butylbenzene 8.00 10.0 80 74-128 <br /> n-Propylbenzene 9.54 10.0 95 75-132 <br /> Naphthalene 8.95 10.0 90 72-135 <br /> sec-Butylbenzene 9.17 10.0 92 74-126 <br /> Styrene 9.25 10.0 93 79-130 <br /> tert-Amyl Methyl Ether 20.3 20.0 102 74-135 <br /> tert-Butyl Alcohol 245 200 123 74-134 <br /> tert-Butyl Ethyl Ether 20.9 20.0 104 72-127 <br /> tert-Butylbenzene 10.2 10.0 102 75-129 <br /> Tetrachloroethene(PCE) 11.9 10.0 119 74-124 <br /> Toluene 10.4 10.0 104 '78-125 <br /> trans-l,2-Dichloroethene 10.4 10.0 104 . 73-117 <br /> trans-1,3-Dichloropropene 10.6 10.0 106 71-137 <br /> trans-1,4-Dichloro-2-butene 22.8 20.0 114 42-150 <br /> Trichloroethene(TCE) 10.5 10.0 105 73-119 <br /> Trichlorofluoromethane 8.82 10.0 88 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 /> 33 <br /> Printed: 05/23/2006 - <br />