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Herst Associates Project: Misc.Samples Reported: 05/23/2007 13:28 <br /> 4630 South Highway 94 North Outer Road Project Number: NCYC Tank Samples <br /> North Outer Rd. Project Manager: David Vasbinder <br /> Saint Charles,MO 63304 <br /> Volatile Organic Anal (EPA Method 8260) <br /> Quality Control Report - Method Blank Analysis <br /> Constituent Batch ID QC Sample ID MB Result Units PQL MDL Lab Quals <br /> Chloroethane BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.094 <br /> Chloroform BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.098 <br /> Chloromethane BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.072 <br /> Dibromochloromethane BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.12 <br /> 1,2-Dibromo-3-chloropropane BQE1046 BQE1046-BLK1 ND ug/L 1.0 0.37 <br /> 1,2-Dibromoethane BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.17 <br /> Dibromomethane BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.36 <br /> 1,2-Dichlorobenzene BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.13 <br /> 1,3-Dichlorobenzene BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.14 <br /> 1,4-Dichlorobenzene BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.089 <br /> Dichlorodifluoromethane BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.085 <br /> 1,1-Dichloroethane BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.11 <br /> 1,2-Dichloroethane BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.13 <br /> 1,1-Dichloroethene BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.12 <br /> cis-1,2-Dichloroethene BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.13 <br /> trans-1,2-Dichloroethene BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.18 <br /> 1,2-Dichloropropane BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.12 <br /> 1,3-Dichloropropane BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.15 <br /> trans-1,3-Dichloropropene BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.11 <br /> Ethylbenzene BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.094 <br /> Hexachlorobutadiene BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.28 <br /> Methylene chloride BQE1046 BQE1046-BLK1 ND ug/L 1.0 0.16 <br /> Methyl t-butyl ether BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.13 <br /> Naphthalene BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.27 <br /> BC Laboratories The results in this report apply to the samples analyzed in accordance with the chain of custody document.This analytical report must be reproduced in its entirety. <br /> Page 34 of 37 <br />