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COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report <br /> Client Applied Earth Sciences,Inc Service Request L2400548 <br /> I P oect Canteen Corp/AGE-NC-99-0612 Date Extracted 03/08/2004 <br /> ple Matrix Water Date Analyzed 03/08/2004 <br /> Lab Control Spike Summary <br /> Volatile Organic Compounds <br /> Extraction Method EPA 5030B Units ug/L <br /> Analysts Method 8260B Basis NA <br /> Level Low <br /> Extraction Lot LWG0401005 <br /> Lab Control Sample <br /> I LWG0401005-3 <br /> Lab Control Spike %Rec <br /> Analyte Name Result Expected %Rec Limits <br /> Benzene 921 100 92 85-114 <br /> 1,2-Dibromoethane(EDB) 941 100 94 88-116 <br /> 1,2-D>,chloroethane(EDC) log 100 109 78-128 <br /> Ethylbenzene 897 100 90 85-119 <br /> Toluene 9 16 100 92 86-118 <br /> o-Xylene 865 100 87 82-119 <br /> m,p-Xylenes 175 200 87 83-120 <br /> Ditsopropyl Ether 17 5 200 87 83-123 <br /> tert-Butyl Ethyl Ether 179 200 89 83-116 <br /> Amyl Methyl Ether 178 200 89 87-123 <br /> yl tert-Butyl Ether 189 200 95 83-116 <br /> tert-Butyl Alcohol 167 200 84 84-114 <br /> Results flagged with an asterisk(*)Indicate values outside control criteria <br /> I Percent recoveries and relative percent differences(RPD)are determined by the software using values in the calculation which have not been rounded <br /> 16 <br /> Printed 03/12/2004 15 48 38 <br /> Form 3C:-Organic Page 1 of 1 <br /> 2 P 1STEALTIBCRYSTAL RPT\Form3LCS rpt Superset Reference RR5281 <br />