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COLUMBIA ANALYTICAL SERVICES,INC <br /> QA1QC Report <br /> Client Applied Earth Sciences, Incorporated Service Request X0400795 <br /> Project Canteen Corp/AGE-NC-99-0612 Date Extracted 09/13/2004 <br /> Ismple Matrix Water Date Analyzed 09/13/2004 <br /> ILab Control Spike/Duplicate 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 XWG0400980 <br /> Lab Control Sample Duplicate Lab Control Sample <br /> XWG0400980-3 XWG0400980-4 <br /> Lab Control Spike Duplicate Lab Control Spike %Rec RPD <br /> Analyte Name Result Expected %Rec Result Expected %Rec Limits RPD Limit <br />' Methyl tert-Butyl Ether 123 100 123 * 125 100 125 * 72-119 2 30 <br /> Benzene 107 100 107 109 100 109 78-120 2 10 <br /> 1,2-Dichloroethane 947 100 95 976 100 98 68-128 3 15 <br /> IToluene 947 100 95 948 100 95 77-125 0 10 <br /> 1,2-Dibromoethane 885 100 89 889 100 89 76-113 0 15 <br /> Ethylbenzene 109 100 109 117 100 117 81-124 7 10 <br /> m,p-Xylenes 198 200 99 197 200 98 83-123 1 10 <br /> o-Xylene 933 100 93 959 100 96 82-116 3 10 <br /> tert-Butyl Alcohol 101 100 101 105 100 105 56-135 3 20 <br /> Diisopropyl Ether 125 100 125 129 100 129 * 71-125 3 30 <br /> 0-Amy].Methyl Ether 116 100 116 122 100 122 * 71-120 5 20 <br /> -Butyl Ethyl Ether 127 100 127 * 13 3 100 133 * 69-119 4 20 <br /> Its flagged with an asterisk(")Indicate values outside control criteria <br />' nt recoveries and relawm percent ddferences(RPD)arc detenvuied by the software usmg values in the calculation Much have not been rounded <br /> Printed 09/20/2004 11 51 59 Form 3C-Organic Page 1 of 1 <br /> 18 L 1STEAL71-31CRYSTAL RPT\Fonn3DLC rpt Superset Reference RR4937 <br />