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COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report <br /> Client Delta Environmental Consultants Service Request X0401098 <br /> Project Canteen Corp Date Extracted 11/24/2004 <br /> pie Matrix Water Date Analyzed 11/24/2004 <br /> ILab Control Spike/Duplicate 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 XWG0401207 <br /> Lab Control Sample Duplicate Lab Control Sample <br /> XWG0401207-3 XWG0401207-4 <br /> Lab Control Spike Duplicate Lab Control Spike <br /> %Rec RPD <br /> Analyte Name Result Expected %Rec Result Expected %Rec Limits RPD Limit <br /> Methyl tert-Butyl Ether 994 100 99 103 100 103 72-119 4 30 <br /> Benzene 105 100 105 104 100 104 78-120 1 10 <br /> 1,2-Dfchloroethane 112 100 - 112 11 1 100 111 68-128 1 15 <br /> Toluene 103 100 103 999 100 100 77-125 3 10 <br /> 1,2-Dlbromoethane 101 100 101 103 100 103 76-113 2 15 <br /> Ethylbenzene 106 100 106 997 100 100 81-124 7 10 <br /> m,p-Xylenes 203 200 101 190 200 95 83-123 7 10 <br /> o-Xylene 101 100 101 926 100 93 82-116 8 10 <br /> tert-Butyl Alcohol 103 100 103 109 100 109 56-135 6 20 <br /> Dusopropyl Ether 106 100 106 106 100 106 71-125 1 30 <br /> AlkAmyl Methyl Ether 102 100 102 100 100 100 71-120 2 20 <br /> Butyl Ethyl Ether 100 100 100 104 100 104 69-119 4 20 <br /> I <br /> 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 /> tPrinted 12/02/2004 14 13 30 Form 3C-Organic Page 1 of 1 <br /> L ISTEALTHICRYSTAL RP-AFonn3DLC rpt Superset Reference RR5212 <br />