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71& LABORATORIES, INC. Herst Associates 4630 South Highway 94 North Outer Road Project: Misc. Samples Reported: 08/28/2007 11:45 Saint Charles, MO 63304 Project Number: NCYC Project Manager: David Vasbinder Volatile Organic Anal sis (EPA Method 8260) Constituent Quality control Report - Method Blank Analysis Sample ID Batch ID QC SampMB Result Units Benzene PQL MDL Lab Quals BQH1594 BQH1594-BLK1 ND Bromochloromethane ug/L 0.50 0.12 BQH1594 BQH1594-BLK1 ND - - - -- - Bromodichloromethane _ u9/L 0.50 0.18 BQH1594 BQH1594-BLK1 ND - - - Bromoform - ___ - ug/L 0.50 0.13 - - _ - BQH1594 BQH1594-BLK1 ND _. - - - Bromomethane - _ ug/L 0.50 0.22 - BQH1594 BQH1594-BLK1 - Carbon tetrachloride - ND ug/L 1.0 _ - - 0.31 _ BQH1594 -- - BQH1594-BLK1 - - Chlorobenzene -- - ug/L 0.50 -_ BQH1594 - - 0.089 BQH1594-BLK1 _- - - ND - Chloroethane - _ ug/L 0.50 - _ - - 0.11 BQH1594 -- BQH1594-BLK1 -- -- - ND - -- Chloroform - ug/L 0 50 - - _ _ 0 12 - BQH1594 -- - -- BQH1594-BLK1 Np - - Chloromethane -. ug/L 0.50 BQH1594 - - - ----- 0 098 BQH1594-BLK1 ND -- - Dibromochloromethane - ug/L 0.50 _ BQH1594 _ _ - - 0.14 BQH1594-BLK1 Np - -- 1,2-Dibromo-3-chloropropane ug/L 0.50 0.12 u 1,2-Dibromoethane g/L BQH1594 BQH1594-BLK1 ND - 1.0 0.37 - BQH1594 BQH1594 BLK1 ND - Dibromomethane - ug/L 0.50 0.13 BQH1594 BQH1594 BLK1 _ - ---- 1,2-Dichlorobenzene - ND ug/L 0.50 0.36 - BQH1594 BQH1594-BLK1 ND - - - - 1,3-Dichlorobenzene ug/L 0.50 0.13 - - BQH1594 - -- BQH1594-BLK1 -- ND _ 1,4-Dichlorobenzene - - -- ug/L 0.50 0.14 BQH1594 -- _ BQH1594-BLK1 ND __ -- - Dichlorodifluoromethane ug/L 0.50 _ - __ _ __ 0.12 BQH1594 - _ BQH1594-BLK1 -- ND 1,1-Dichloroethane - - - ug/L 0.50 -- BQH1594 -- 0 11 BQH1594-BLK1 _- ---- _ - - ND 1,2-Dichloroethane - - - ug/L - - -_-_ -- - 0.50 11 BQH1594 -- _- _ BQH1594-BLK1 - -__ ND _ _ ug/L - ,1-Dichloroethene 0 50 _ 0 098 BQH 1594 --- BQH1594-BLK1 ND -.-_ cis-1,2-Dichloroethene - _- ug/L 0.50 012 BQH1594 - - BQH1594-BLK1 Np trans-1,2-Dichloroethene - - -__ ug/L 0.50 0.11 - BQH1594 -_ _._ - BQH1594-BLK1 ND - - - -Dichloropropane ug/L 0.50 0.14 BQH1594 BOH1594-BLK1 ND - - - ug/L- 0.50 0.12 BC Laboratories The results in this report apply to the samples analyzed in accordance wish the chain of custody document. This analyticalrirety. eport must be reproduced in its ent 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 a 4100 Atlas Court-Bakersfield,CA 93308 -(661)327-4911 -FAX(661)327-1918 -www.bclabs.com p rty interpretation. Page 29 of 32