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LABORATORIES, INC. <br /> Herst Associates Project: Misc.Samples Reported: 10/23/2007 12:20 <br /> 4630 South Highway 94 North Outer Road Project Number: NCYC <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 POL MDL Lab Quals <br /> trans-1,4-Dir-hioro-2-butene BQJ1250 BQJ1250-BLK1 <5.0 ug/L 5.0 <br /> - -1.----.---- -................ ---------111 ---.......... <br /> Dlisopropyl ether BQJ1250 BQJ1250-BLK1 <0,50 u?/L. -.-1 0.1 5 1,0 <br /> . ........ .....................- .........-----. ........... <br /> EthanolBQJ1250 BQJ1250-BLK1 <250 ug/L 250 <br /> ................ ........ <br /> Ethyl t-butyl ether BQJ1250 BQJ1250-BLK1 <0.50 u-g 11 L ................0,.1501- <br /> .11-11-1.1-............. ------- ------....... ............ ........ <br /> 2-Hexanone BQJ1250 BQJ1250-BLK1 <10 u g I I 1 0---- <br /> ............... <br /> Methyl ethyl ketoneBQJ1250 BQJ1250-BLK1 <10 ug/L .I.0. <br /> ............- 1--....1-1---------- ............. <br /> Methyl iodide BQJ1250 BQJ1250-BLK1 <2 1 ,01- ug./.L 2,0 <br /> .. - <br /> ........... ......—----. ........11 ------- <br /> Methyl isobutyl ketone BQJ1250 BQJ1250-BLKI <10 ugJL 10- <br /> ..........I <br /> Vinyl acetate BQJ1250 BQJ1250-BLK1 <10 ugiL 10 <br /> ---------- ...................... <br /> 1,2-Dichloroethane-d4(Surrogate) BQJ1250 BQJ1250-BLK1 103 % 76-114 (LCL-UCL) <br /> Toluene-d8(Surrogate) BQJ1250 BQJ1250-BLKI 98.7 % 88-110 (LCL-UCL).. <br /> ..............-..................- <br /> 4-Bromofluorobenzene(Surrogate) BQJ1250 BQJ1250-BLKI 99.0 % 86-115 (LCL-UCL) <br /> BC Laboratories The results in this report apply to the samples analyzed in accordance with the chain of ustody document. This analytical report must be reproduced in its entirety. <br /> All results listed in this report are for the exclusive use of the submittitig party.BC Laboratories,Inc.assumes no responsibility for report alteration,separation, detachment or third party interpretation. Page 31 of 32 <br /> 4100 Atlas Court-Bakersfield,CA 93308-(661)327-4911 -FAX(661)327-1918-www.belabs.com <br />