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M ® ® M M ® M ® M M ® ® ® ® M <br /> 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 /> Methyl isobutyl ketone BQE1046 BQE1046-BLK1 ND ug/L 10 3.6 <br /> Vinyl acetate BQE1046 BQE1046-BLK1 ND ug/L 10 4.7 <br /> 1,2-Dichloroethane-d4(Surrogate) BQE1046 BQE1046-BLK1 102 % 76-114 (LCL-UCL) <br /> Toluene-d8(Surrogate) BQE1046 BQE1046-BLK1 102 % 88-110 (LCL-UCL) <br /> 4-Bromofluorobenzene(Surrogate) BQE1046 BQE1046-BLK1 97.0 % 86-115 (LCL-UCL) <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 36 of 37 <br />