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Laboratories Inc. <br /> Environmental Testing Laboratory Since 1949 <br /> Herst Associates Project: NCYC Reported: 12/02/2009 12:27 <br /> 4630 South Highway 94 North Outer Road Project Number: [none] <br /> Saint Charles,MO 63304 Project Manager Erin Fanning <br /> Volatile Organic Analysis (EPA Method 8260) <br /> Quality Control Report - Method Blank Analysis <br /> lConstituent Batch ID OC Sample ID MB Result Units PQL MDL Lab Quals <br /> trans-1,4-Dichloro-2-butene BSK1614 BSK1614-BLK1 <5.0 ug/L 5.0 <br /> Diisopropyl ether BSK1614 BSK1614-BLKI <0.50 ug/L 0.50 <br /> Ethanol BSK1614 BSK1614-BLK1 <250 uglL 250 <br /> Ethyl t-butyl ether BSK1614 BSK1614-BLKI <0.50 ug/L 0.50 <br /> 2-Hexanone BSK1614 BSK1614-BLK1 <10 ug/L 10 <br /> Methyl ethyl ketone BSK1614 BSK1614-BLKI <10 ug/L 10 <br /> Methyl iodide BSK1614 BSK1614-BLKI <2.0 ug/L 2,0 <br /> Methyl isobutyl ketone BSK1614 BSK1614-BLK1 <10 ug/L 10 <br /> Vinyl acetate BSK1614 BSK1614-BLK1 <10 ug/L 10 <br /> 1,2-Dichloroethane-d4(Surrogate) BSK1614 BSK1614-BLK1 94.0 % 76-114 (LCL-UCL) <br /> Toluene-d8(Surrogate) BSK1614 BSK1614-BLK1 97.2 % 88-110 (LCL-UCL) <br /> 4-Bromofluorobenzene(Surrogate) BSK1614 BSK1614-BLKI 93.6 % 86-115 (LCL-UCL) <br /> 77re results in this report apply to the samples analjred 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 parry interpretation, <br /> 4100Atlas Court Bakersfield,CA 93308 (661):327-4911 FAX(661)327-1918 www.bclabs.com Page 35 of 36 <br /> Certifications: California-ELAP Certification Number 1186; Nevada Administrative Code-NAC-445A <br />