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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 /> 1,2,3-Trichlorobenzene BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0012 <br /> 1,2,4-Trichlorobenzene BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0015 <br /> 1,1,1-Trichloroethane BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0012 <br /> 1,1,2-Trichloroethane BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0012 <br /> Trichloroethene BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0013 <br /> Trichlorofluoromethane BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0017 <br /> 1,2,3-Trichloropropane BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0026 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0018 <br /> 1,2,4-Trimethylbenzene BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0012 <br /> 1,3,5-Trimethyl benzene BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0015 <br /> Vinyl chloride BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0021 <br /> Total Xylenes BQE0698 BQE0698-BLK1 ND mg/kg 0.010 0.0037 <br /> p-&m-Xylenes BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0025 <br /> o-Xylene BQE0698 BQE0698-BLK1 ND mg/kg 0.0050 0.0013 <br /> 1,2-Dichloroethane-d4(Surrogate) BQE0698 BQE0698-BLK1 90.3 % 70-121 (LCL-UCL) <br /> Toluene-d8(Surrogate) BQE0698 BQE0698-BLK1 106 % 81-117 (LCL-UCL) <br /> 4-Bromofluorobenzene(Surrogate) BQE0698 BQE0698-BLK1 92.9 % 74-121 (LCL-UCL) <br /> Benzene BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.14 <br /> Bromochloromethane BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.18 <br /> Bromodichloromethane BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.13 <br /> Bromoform BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.22 <br /> Bromomethane BQE1046 BQE1046-BLK1 ND ug/L 1.0 0.31 <br /> Carbon tetrachloride BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.077 <br /> Chlorobenzene BQE1046 BQE1046-BLK1 ND ug/L 0.50 0.11 <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 33 of 37 <br />