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Herst Associates Project: Misc.Samples Reported: 05/23/2007 13:28 <br /> 4630 South Highway 94 North Outer Road Project Number: NCYC Tank Samples <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 BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0014 <br /> Bromobenzene BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.00080 <br /> Bromochloromethane BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.00090 <br /> Bromodichloromethane BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0011 <br /> Bromoform BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0023 <br /> Bromomethane BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0019 <br /> n-Butylbenzene BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0015 <br /> sec-Butylbenzene BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0013 <br /> tert-Butylbenzene BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0013 <br /> Carbon tetrachloride BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0018 <br /> Chlorobenzene BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0011 <br /> Chloroethane BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0016 <br /> Chloroform BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0011 <br /> Chloromethane BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0017 <br /> 2-Chlorotoluene BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.00091 <br /> 4-Chlorotoluene BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0011 <br /> Dibromochloromethane BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.00096 <br /> 1,2-Dibromo-3-chloropropane BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0020 <br /> 1,2-Dibromoethane BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0011 <br /> Dibromomethane BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0014 <br /> 1,2-Dichlorobenzene BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.00091 <br /> 1,3-Dichlorobenzene BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0012 <br /> 1,4-Dichlorobenzene BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0013 <br /> Dichlorodifluoromethane BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0021 <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 31 of 37 <br />