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Herst Associates Project: Misc.Samples Reported: 05/23/2007 13:27 <br /> 4630 South Highway 94 North Outer Road Project Number: NCYC Well Sample <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 Quaffs <br /> 1,2-Dichloroethane-d4(Surrogate) BQE0962 BQE0962-BLK1 103 / 76-114(LCL-UCL) <br /> Toluene-d8(Surrogate) BQE0962 BQE0962-BLK1 97.5 % 88-110(LCL-UCL) <br /> 4-Bromofluorobenzene(Surrogate) BQE0962 BQE0962-BLK1 97.1 % 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 rp-daced in its entirety. <br /> Page 23 of 24 <br />