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Herst Associates Project: Misc.Samples Reported: 05/23/2007 13:31 <br /> 4630 South Highway 94 North Outer Road Project Number: [none] <br /> North Outer Rd. Project Manager: David Vasbinder <br /> Saint Charles,MO 63304 <br /> Volatile Organic Analysis (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 /> 1,3-Dichloropropane BQE1080 BQE1080-BLK1 ND ug/L 0.50 <br /> trans-1,3-Dichloropropene BQE1080 BQE1080-BLK1 ND ug/L 0.50 <br /> Ethylbenzene BQE1080 BQE1080-BLK1 ND ug/L 0.50 <br /> Hexachlorobutadiene BQE1080 BQE1080-BLK1 ND ug/L 0.50 <br /> Methylene chloride BQE1080 BQE1080-BLK1 ND ug/L 1.0 <br /> Methyl t-butyl ether BQE1080 BQE1080-BLK1 ND ug/L 0.50 <br /> Naphthalene BQE1080 BQE1080-BLK1 ND ug/L 0.50 <br /> Styrene BQE1080 BQE1080-BLK1 ND ug/L 0.50 <br /> 1,1,2,2-Tetrachloroethane BQE1080 BQE1080-BLK1 ND ug/L 0.50 <br /> Tetrachloroethene BQE1080 BQE1080-BLK1 ND ug/L 0.50 <br /> Toluene BQE1080 BQE1080-BLK1 ND ug/L 0.50 <br /> 1,2,4-Trichlorobenzene BQE1080 BQE1080-BLK1 ND ug/L 0.50 <br /> 1,1,1-Trichloroethane BQE1080 BQE1080-BLK1 ND ug/L 0.50 <br /> 1,1,2-Trichloroethane BQE1080 BQE1080-BLK1 ND ug/L 0.50 <br /> Trichloroethene BQE1080 BQE1080-BLK1 ND ug/L 0.50 <br /> Trichlorofluoromethane BQE1080 BQE1080-BLK1 ND ug/L 0.50 <br /> 1,2,3-Trichloropropane BQE1080 BQE1080-BLK1 ND ug/L 1.0 <br /> Vinyl chloride BQE1080 BQE1080-BLK1 ND ug/L 0.50 <br /> Total Xylenes BQE1080 BQE1080-BLK1 ND ug/L 0.50 <br /> Acetone BQE1080 BQE1080-BLK1 ND ug/L 10 <br /> Acrylonitrile BQE1080 BQE1080-BLK1 ND ug/L 5.0 <br /> t-Amyl Methyl ether BQE1080 BQE1080-BLK1 ND ug/L 0.50 <br /> t-Butyl alcohol BQE1080 BQE1080-BLK1 ND ug/L 10 <br /> Carbon disulfide BQE1080 BQE1080-BLK1 ND ug/L 1.0 <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 40 of 42 <br />