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LABORATORIES, INC. <br /> Herst Associates Project: Misc. Samples Reported: 06/29/2007 11:04 <br /> 4630 South Highway 94 North Outer Road Project Number: NCYC VOC 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 /> trans-1,4-Dichloro-2-butene BQF0932 BQF0932-BLK1 ND ug/L 5.0 2.0 <br /> Diisopropyl ether BQF0932 BQF0932-BLK1 ND ug/L 0.50 0.34 <br /> Ethanol BQF0932 BQF0932-BLK1 ND ug/L 250 57 <br /> Ethyl t-butyl ether BQF0932 BQF0932-BLK1 ND ug/L 0.50 0.32 <br /> 2-Hexanone BQF0932 BQF0932-BLK1 ND ug/L 20 2.2 <br /> Methyl ethyl ketone BQF0932 BQF0932-BLK1 ND ug/L 10 3.4 <br /> Methyl iodide BQF0932 BQF0932-BLK1 ND ug/L 2.0 0.33 <br /> Methyl isobutyl ketone BQF0932 BQF0932-BLK1 ND ug/L 10 3.6 <br /> Vinyl acetate BQF0932 BQF0932-BLK1 ND ug/L 10 4.7 <br /> 1,2-Dichloroethane-d4(Surrogate) BQF0932 BQF0932-BLK1 90.6 % 76-114 (LCL-UCL) <br /> Toluene-d8(Surrogate) BQF0932 BQF0932-BLK1 97.5 % 88-110 (LCL-UCL) <br /> 4-Bromofluorobenzene(Surrogate) BQF0932 BQF0932-BLK1 95.9 % 86-115 (LCL-UCL) <br /> Benzene BQF1033 BQF1033-BLK1 ND ug/L 1.0 0.12 <br /> Bromochloromethane BQF1033 BQF1033-BLK1 ND ug/L 0.50 0.18 <br /> Bromodichloromethane BQF1033 BQF1033-BLK1 ND ug/L 0.50 0.13 <br /> Bromoform BQF1033 BQF1033-BLK1 ND ug/L 0.50 0.22 <br /> Bromomethane BQF1033 BQF1033-BLK1 ND ug/L 1.0 0.31 <br /> Carbon tetrachloride BQF1033 BQF1033-BLK1 ND ug/L 0.50 0.089 <br /> Chlorobenzene BQF1033 BQF1033-BLK1 ND ug/L 0.50 0.11 <br /> Chloroethane BQF1033 BQF1033-BLK1 ND ug/L 0.50 0.12 <br /> Chloroform BQF1033 BQF1033-BLK1 ND ug/L 0.50 0.098 <br /> Chloromethane BQF1033 BQF1033-BLK1 ND ug/L 0.50 0.14 <br /> Dibromochloromethane BQF1033 BQF1033-BLK1 ND ug/L 0.50 0.12 <br /> 1,2-Dibromo-3-chloropropane BQF1033 BQF1033-BLK1 ND ug/L 1.0 0.37 <br /> BC Laboratories The results in this report apply to the samples analyzed in accordance tivith the chain of custody document. This analytical report must be reproduced in its entirety. <br /> All results listed in this report are for the exclusive use of the submitting party.BC Laboratories,Inc.assumes no responsibility for report alteration,separation, detachment or third party interpretation. Page 27 of 30 <br /> 4100 Atlas Court-Bakersfield,CA 93308 -(661)327-4911 -FAX(661)327-1918 -www.bclabs.com <br />