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® = = ! = = i ® = = = = = ® ® ® = = <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 - Laboratory Control Sample <br /> Control Limits <br /> Spike Percent Percent <br /> Constituent Batch ID QC Sample ID QC Type Result Level PQL Units Recovery RPD Recovery RPD Lab Quals <br /> 4-Bromofluorobenzene(Surrogate) BQE1046 BQE1046-BS1 LCS 10.310 10.000 ug/L 103 86-115 <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 30 of 37 <br />