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Laboratories Inc. <br /> t a <br /> Environmental Testing Laboratory Since 1949 <br /> Herst Associates Reported: 06/23/2010 12:34 <br /> 4630 South Highway 94 North Outer Road Project: Austin Road/NCYCC Drilling <br /> Saint Charles,MO 63304Project Number: [nonel_ - .................... <br /> ......................... ------------ <br /> Project Manager: Erin Fanning <br /> Volatile Organic Analysis (EPA Method 8260) <br /> A <br /> BCL Sample ID: 1001 Client Sample Name: Trio Blank,6/14/2010 12:00:00MIN't <br /> MB Lab <br /> Constituent Result Units P MDL Method Bias gMgs_Run# <br /> Methyl isobutyl ketone NO ug/L 10 2.1 EPA-8260 NO <br /> Methyl methacrylate NO ug/L 5.0 1.5 EPA-8260 NO <br /> Propionitrile NO ug/L 20 4.5 EPA-8260 NO —----- <br /> Vinyl acetate NO ug/L 10 2.4 EPA-8260 NO <br /> 1,2-Dichloroethane-d4(Surrogate) 102 % 76-114 (LCL-UCL) EPA-8260 <br /> Toluene-d8(Surrogate) 102 % 88-110 (LCL-UCL) EPA-8260 <br /> 4-Bromofluorobenzene(Surrogate) 95,9 % 86-115 (LCL-UCL) EPA-8260 <br /> Run 010 <br /> Run# Method Pre e Date Date/Time Anal at Instrument Dilution Batch ID <br /> 1 EPA-8260 06/21/10 06123/10 03:40 MGC MS-V5 1 BTF1398 <br /> 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 <br /> 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.belabs.com Page 30 of 36 <br />