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LABORATORIES, INC. <br /> Herst Associates Project: Misc. Samples Reported: 08/06/2007 11:10 <br /> 4630 South Highway 94 North Outer Road Project Number: NCYC <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 /> cis-1,3-Dichloropropene BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.086 <br /> trans-1,3-Dichloropropene BOH0144 BQH0144-BLK1 ND ug/L 0.50 0.11 <br /> Ethylbenzene BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.13 <br /> Hexachlorobutadiene BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.31 <br /> Methylene chloride BQH0144 BQH0144-BLK1 ND ug/L 1.0 0.16 <br /> Methyl t-butyl ether BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.13 <br /> Naphthalene BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.27 <br /> Styrene BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.15 <br /> 1,1,1,2-Tetrachloroethane BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.19 <br /> 1,1,2,2-Tetrachloroethane BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.22 <br /> Tetrachloroethene BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.11 <br /> Toluene BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.12 <br /> 1,2,4-Trichlorobenzene BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.18 <br /> 1,1,1-Trichloroethane BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.27 <br /> 1,1,2-Trichloroethane BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.12 <br /> Trichloroethene BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.13 <br /> Trichlorofluoromethane BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.14 <br /> 1,2,3-Trichloropropane BQH0144 BQH0144-BLK1 ND ug/L 1.0 0.42 <br /> Vinyl chloride BQH0144 BOH0144-BLK1 ND ug/L 0.50 0.14 <br /> Total Xylenes BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.33 <br /> Acetone BQH0144 BQH0144-BLK1 8.1100 ug/L 10 6.2 J,M03 <br /> Acrylonitrile BQH0144 BQH0144-BLK1 ND ug/L 5.0 2.0 <br /> t-Amyl Methyl ether BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.34 <br /> t-Butyl alcohol BQH0144 BQH0144-BLK1 ND ug/L 10 9.3 <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 /> All results listed in this report are for the exclusive use of the submitting party.BC Laboratories,Inc.assumes no responsibility for report alteration,separation, detachment or third party interpretation. Page 30 of 32 <br /> 4100 Atlas Court•Bakersfield,CA 93308•(661)327-4911 •FAX(661)327-1918•www.bclabs.com <br />