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LABORATORIES, INC. <br /> Herst Associates Project: NCYC Reported: 03/20/2008 12'.48 <br /> 4630 South Highway 94 North Outer Road Project Number: fnone] <br /> Saint Charles, MO 63304 Project Manager: David Vasbinder <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-Di chloro-2-butene BRC0903 BRC0903-BLKI <5�O ug/L 5.0 <br /> ---------- ........... <br /> Diisopropyl ether BRC0903 BRC0903-BLKI <0.50 ug/L 0.50 ................. <br /> Ethanol BRC0903 BRC0903-BLKI <250 ug/L 250 <br /> .................................. ----------------- ------ ----------- <br /> Ethyl t-butyl ether BRC0903 BRC0903-BLKI <0-50 ug/L 0.50 <br /> ............ <br /> 2-Hexanone BRC0903 BRC0903-BLK1 <20 -u g/I L ............... 2.0 <br /> Methyl ethyl ketone BRC0903 BRC0903-BLK1 <10 ug/L 10 <br /> .......... - ----- <br /> Methyl iodide BRC0903 BRC0903-BLK1 <2.0 ug/.L 2---0 <br /> Methyl isobutyll ketone BRC0903 BRC0903-BLKI <10 ug/L 10 <br /> ------------ <br /> Vinyl acetate BRC0903 BRC0903-BLK1 <10 ug/L 10 ................. <br /> 1,2-Dichloroethane-d4(Surrogate) BRC0903 BRC0903-BLK1 101 % 76-114 (LCL-UCL) <br /> _.---------------- —------ <br /> Toluene-d8(Surrogate) BRC0903 BRC0903-BLKI 102 88-110 (LCL-UCL) <br /> -- - -------------------- .......... <br /> 4-Bromofluorobenzene(Surrogate) BRC0903 BRC0903-BLK1 96,11 % 86-115 (LGL-UCL) <br /> ................ ................. .. ............ ........... <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 /> 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 37 of 38 <br /> 4 100 Atlas Court-Bakersfield,CA 93308 -(661)327-491.1 -FAX(661)327-1918-www.bclabs.com <br />