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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 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 /> Benzene BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.12 <br /> Bromochloromethane BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.18 <br /> -- - --- --- - ---- - - --- <br /> Bromodichloromethane BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.13 <br /> Bromoform BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.22 <br /> Bromomethane BQH0144 BQH0144-BLK1 ND ug/L 1.0 0.31 <br /> Carbon tetrachloride BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.089 <br /> Chlorobenzene BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.11 <br /> Chloroethane BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.12 <br /> Chloroform BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.098 <br /> Chloromethane BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.14 <br /> Dibromochloromethane BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.12 <br /> 1,2-Dibromo-3-chloropropane BQH0144 BQH0144-BLK1 ND ug/L 1.0 0.37 <br /> - - - - - --- --- ---- ----_---- -- <br /> 1,2-Dibromoethane BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.13 <br /> Dibromomethane BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.36 <br /> 1,2-Dichlorobenzene BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.13 <br /> 1,3-Dichlorobenzene BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.14 <br /> 1,4-Dichlorobenzene BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.12 <br /> Dichlorodifluoromethane BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.11 <br /> 1,1-Dichloroethane BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.11 <br /> 1,2-Dichloroethane BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.098 <br /> 1,1-Dichloroethene BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.12 <br /> cis-1,2-Dichloroethene BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.11 <br /> trans-1,2-Dichloroethene BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.14 <br /> 1,2-Dichloropropane BQH0144 BQH0144-BLK1 ND ug/L 0.50 0.12 <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 29 of 32 <br /> ® ® ® �004JWouroWers%WA Sift-(6(i"7-49JJlhJAX JM32710-wv j"abs.fft <br />