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COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report <br /> Client Delta Environmental Consultants Service Request X0401098 <br /> I project Canteen Corp Date Extracted 11/23/2004 <br /> ple Matrix Water Date Analyzed 11/23/2004 <br /> Lab Control Spike/Duplicate Lab Control Spike Summary <br /> Volatile Organic Compounds <br /> fExtraction Method EPA 5030B Units ug/L <br /> Analysis Method 8260B Basis NA <br /> Level Low <br /> Extraction Lot XWG0401209 <br /> Lab Control Sample Duplicate Lab Control Sample <br /> XWG0401209-3 XWG0401209-4 <br /> Lab Control Spike Duplicate Lab Control Spike o <br /> /oRec RPD <br /> Analyte Name Result Expected °/oRec Result Expected "/oRec Limits RPD Limit <br /> IMethyl tert-Butyl Ether 107 100 107 104 100 104 72-119 3 30 <br /> Benzene 11 1 10 0 111 110 100 110 78-120 0 10 <br /> 1,2-Dichloroethane 113 100 113 113 10 0 113 68-128 0 15 <br /> Toluene 113 100 113 109 100 109 77-125 4 10 <br /> 1,2-Dibromoethane 107 100 107 108 100 108 76-113 1 15 <br /> Ethylbenzene 112 100 112 106 100 106 81-124 5 10 <br /> m,p-Xylenes 216 200 108 207 200 103 83-123 5 10 <br /> o-Xylene 108 100 108 102 100 102 82-116 6 10 <br /> tert-Butyl Alcohol 116 100 116 118 100 118 56-135 2 20 <br /> Dusopropyl Ether 11 2 100 112 11 1 100 ill 71-125 1 30 <br /> myl Methyl Ether 110 100 110 11 1 100 111 71-120 1 20 <br /> utyl Ethyl Ether 108 100 108 10 7 100 107 69-119 1 20 <br /> i <br /> i <br /> i <br /> i <br /> I <br /> Os flagged with an asterisk(")indicate values outside control criteria <br /> IPercent recoveries and relative percent differences(RPD)are determined by the software using values in the calculation which have not been rounded <br /> Printed 12/02/2004 14 13 33 Form 3C-Organic Page 1 of 1 <br /> L 1STEALT11CRYSTAL RPTtForm3DLC rpt SuperSet Reference RR5212 <br />