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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 /> 1,1,1-Trichloroethane BQF1033 BQF1033-BLK1 ND ug/L 0.50 0.27 <br /> 1,1,2-Trichloroethane BQF1033 BQF1033-BLK1 ND ug/L 0.50 0.12 <br /> Trichloroethene BQF1033 BQF1033-BLK1 ND ug/L 0.50 0.13 <br /> Trichlorofluoromethane BQF1033 BQF1033-BLK1 ND ug/L 0.50 0.14 <br /> 1,2,3-Trichloropropane BQF1033 BQF1033-BLK1 ND ug/L 1.0 0.42 <br /> Vinyl chloride BQF1033 BQF1033-BLK1 ND ug/L 0.50 0.14 <br /> Total Xylenes BQF1033 BQF1033-BLK1 ND ug/L 1.0 0.33 <br /> Acetone BQF1033 BQF1033-BLK1 ND ug/L 10 6.2 <br /> Acrylonitrile BQF1033 BQF1033-BLK1 ND ug/L 5.0 2.0 <br /> t-Amyl Methyl ether BQF1033 BQF1033-BLK1 ND ug/L 2.0 0.34 <br /> t-Butyl alcohol BQF1033 BQF1033-BLK1 ND ug/L 10 9.3 <br /> Carbon disulfide BQF1033 BQF1033-BLK1 ND ug/L 1.0 0.24 <br /> trans-l,4-Dichloro-2-butene BQF1033 BQF1033-BLK1 ND ug/L 5.0 2.0 <br /> Diisopropyl ether BQF1033 BQF1033-BLK1 ND ug/L 2.0 0.34 <br /> Ethanol BQF1033 BQF1033-BLK1 ND ug/L 1000 57 <br /> Ethyl t-butyl ether BQF1033 BQF1033-BLK1 ND ug/L 2.0 0.32 <br /> 2-Hexanone BQF1033 BQF1033-BLK1 ND ug/L 20 2.2 <br /> Methyl ethyl ketone BQF1033 BQF1033-BLK1 ND ug/L 20 3.4 <br /> Methyl iodide BQF1033 BQF1033-BLK1 ND ug/L 2.0 0.33 <br /> Methyl isobutyl ketone BQF1033 BQF1033-BLK1 ND ug/L 20 3.6 <br /> Vinyl acetate BQF1033 BQF1033-BLK1 ND ug/L 20 4.7 <br /> 1,2-Dichloroethane-d4(Surrogate) BQF1033 BQF1033-BLK1 96.9 % 76-114 (LCL-UCL) <br /> Toluene-d8(Surrogate) BQF1033 BQF1033-BLK1 98.8 % 88- 110 (LCL-UCL) <br /> 4-Bromofluorobenzene(Surrogate) BQF1033 BQF1033-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 he 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 29 of 30 <br /> 4100 Atlas Court-Bakersfield,CA 93308-(661)327-4911 -FAX(661)327-1918-www.bclabs.com <br />