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LABORATORIES, INC. <br /> Herst Associates Project: Misc. Samples Reported: 09/24/2007 8:37 <br /> 4630 South Highway 94 North Outer Road Project Number: NCYC <br /> Saint Charles, MO 63304 Project Manager: David Vasbinder <br /> Volatile Organic Analysis (EPA Method8260) <br /> BCL Sample ID: 0710769-01 Client Sample Name: Field Blank @ Indoor faucet, 9/11/2007 8:05:00AM, David Vasbinder <br /> Prep Run Instru- QC MB Lab <br /> Constituent Result Units PQL MDL Method Date Date/Time Analyst ment ID Dilution Batch ID Bias Quals <br /> 1,2-Dichloropropane ND ug/L 0.50 0.12 EPA-8260 09/18/07 09/19/07 04:08 MGC MS-V5 1 BQ10811 ND <br /> 1,3-Dichloropropane ND ug/L 0.50 0.15 EPA-8260 09/18/07 09/19/07 04:08 MGC MS-V5 1 BQ10811 ND <br /> trans-1,3-Dichloropropene ND ug/L 0.50 0.11 EPA-8260 09/18/07 09/19/07 04:08 MGC MS-V5 1 BQ10811 ND <br /> Ethylbenzene ND ug/L 0.50 0.13 EPA-8260 09/18/07 09/19/07 04:08 MGC MS-V5 1 BQ10811 ND <br /> Hexachlorobutadiene ND ug/L 0.50 0.31 EPA-8260 09/18/07 09/19/07 04:08 MGC MS-V5 1 BQ10811 ND <br /> Methylene chloride ND ug/L 1.0 0.16 EPA-8260 09/18/07 09/19/07 04:08 MGC MS-V5 1 BQ10811 0.24 <br /> Methyl t-butyl ether ND ug/L 0.50 0.13 EPA-8260 09/18/07 09/19/07 04:08 MGG MS-V5 1 BQ10811 ND <br /> Naphthalene ND ug/L 0.50 0.27 EPA-8260 09/18/07 09/19/07 04:08 MGC MS-V5 1 BQ10811. ND <br /> Styrene ND ug/L 0.50 0.15 EPA-8260 09/18/07 09/19/07 04:08 MGC MS-V5 1 BQ10811 ND <br /> 1,1,2,2-Tetrachloroethane ND ug/L- 0.50 0.22 EPA-8260 09/18/07 09/19/07 04:08 MGC MS-V5 1 BQ10811 ND <br /> Tetrachloroethene ND ug/L 0.50 0.11 EPA-8260 09/18/07 09/19/07 04:08 MGC MS-V5 1 BQ10811 ND <br /> Toluene ND ug/L 0.50 0.12 EPA-8260 09/18/07 09/19/07 04:08 MGC MS-V5 1 BQ10811 ND <br /> 1,2,4-Trichlorobenzene ND ug/L 0.50 0.18 EPA-8260 09/18/07 09/19/07 04:08 MGC MS-V5 1 BQ10811 ND <br /> 1,1,1-Trichloroethane ND ug/L 0.50 0.27 EPA-8260 09/18/07 09/19/07 04:08 MGC MS-V5 1 BQ10811 ND <br /> 1,1,2-Trichloroethane ND ug/L 0.50 0.12 EPA-8260 09/18/'07 09/19/07 04:08 MGC MS-V5 1 BQ10811 ND <br /> Trichloroethene ND ug/L 0.50 0.13 EPA-8260 09/18/07 09/19/07 04:08 MGC MS-V5 1 BQ10811 ND <br /> Trichlorofluoromethane ND ug/L 0.50 0.14 EPA-8260 09/18/07 09/19/07 04.08 MGC MS-V5 1 BQ10811 ND <br /> 1,2,3-Trichloropropane ND ug/L 1.0 0.42 EPA-8260 09/18/07 09/19/07 04:08 MGC MS-V5 1 BQ10811 ND <br /> Vinyl chloride ND ug/L 0.50 0.14 EPA-8260 09/18/07 09/19/07 04:08 MGC MS-V5 1 B010811 ND <br /> Total Xylenes ND ug/L 0.50 0.33 EPA-8260 09/18/07 09/19/07 04:08 MGC MS-V5 1 BQ10811 ND <br /> Acetone ND ug/L 10 6.2 EPA-8260 09/18/07 09/19/07 04:08 MGC MS-V5 1 BQ10811 ND <br /> Acrylonitrile ND ug/L 5.0 2.0 EPA-8260 09/18/07 09/19/07 04:08 MGC MS-V5 1 BQ10811 ND <br /> t-Amyl Methyl ether ND ug/L 0.50 0.34 EPA-8260 09/18/07 09/19/07 04:08 MGC MS-V5 1 BQ10811 ND <br /> BC Laboratories The results in this report apply to the samples analyzed in accordance with the chain ofcusiody document. This analytical report must be reproduced in its entirety. <br /> Ail results listed in this report are for the exclusive use of the submitting parry.BC Laboratories,Inc.assumes no responsibility for report alteration,separation, detachment or third party interpretation. Parte 4 of 32 <br /> 0 At urt• rsfie <br /> 13308• 661)327-4911 •FAX(661)327-1918•www.bclabs.com <br />