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Laboratories Inc. <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 63304 Project Number: (none] <br /> Project Manager. Erin Fanning <br /> Volatile Organic Analysis (EPA Method 8260) <br /> BCL Sample ID: 10011252-07 Client Sample Name: DUP,6/14/2010 12:00:00AM <br /> MB Lab <br /> Constituent Result Units PQL MDL Method Bias gualls Run# <br /> Methyl isobutyl ketone NO ug/L 10 2.1 EPA-8260 NO <br /> Methyl methacrylate µ 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-Dichloroethene-d4(Surrogate) 99.5 % 76-114 (LCL-UCL) EPA-8260 <br /> --------——-------- <br /> Toluene-d8(Surrogate) 101 % 88-110 (LCL-UCL) EPA-8260 <br /> 4-Bromofluoroberizene(Surrogate) 95.2 % 86-115 (LCL-UCL) EPA-8260 <br /> Run QC <br /> Run# Method Prep Date Date/Time Analyst Instrument Dilution Batch ID <br /> 1 EPA-8260 06/21110 06/23/10 03:11 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 be reproduced in its entirely. <br /> Ali 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.bcjabs.com Page 27 of 36 <br />