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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 tauter Road Project: Austin Road/NCYCC Drilling <br /> Saint Charles,M®63304 Project Number. [none] <br /> Project Manager:J 9 Erin Fanning <br /> Volatile Organic Analysis (EPA Method6260) <br /> SCL-Sample ID: 10011252-03 Client Sample Name: AMW-235,6114120-110 10:23:00AM <br /> MB Lab <br /> Constituent Result Units PQL MDL Method Bias Qualls Run# <br /> Styrene NO ug/L 0.50 0.093 EPA-8260 NO 1 <br /> 1,1,1,2-Tetrachloroethane NO ug/L 0.50 0.11 EPA-8260 NO <br /> 1,1,2,2-Tetrachloroethane NO ug/L 0.50 - 0.14 EPA-8260 NO 1 <br /> Tetrachloroethene NO ug/L 0.50 0.13 EPA-8260 NO 1 <br /> Toluene 0.12 ug/L 0.50 0.093 EPA-8260 ND J 1 <br /> 1,2,4-Trichlorobenzene ND ug/L 0.50 0.17 EPA-8260 NO 1 <br /> 1,1,1-Trichloroethane__. NO ug/L 0.50 ---0.081 _ EPA-8260 NO 1 <br /> 1,1,2-Trichloroethane NO ug/L 0.50 0.21 EPA-8260 NO <br /> Trichloroethene NO ug/L 0.50 0.13 EPA-8260 NO 1 <br /> Trichlorofluoromethane NO ug/L 0.50 0.11 EPA-8260 NO 1 -- <br /> 1,2,3-Trichloropropane - - ---NO ug/L 1.0 0.30-EPA-8260 NO 1 <br /> Vinyl chloride Na ug/L 0.50 0.14 EPA-8260 NO 1 <br /> Total Xylenes NO ug/L 1.0 0.26 EPA-8260 NO <br /> _ --- - - _._.._.- -- - - - <br /> Acetone NO ug/L 10 4.6 EPA-6260 NO <br /> Acetonitrile --- - NO -ug/L - 10 6.3 EPA-8260 µ NO 1 <br /> Acrolein NO ug/L 20 8.9 EPA-8260 NO 1 <br /> Acrylonitrile---_-� - - NO -- ug/t. 5.0 1.2 EPA-8260 NO 1 <br /> Ally!chloride NO ug/L 5.0 0.80 EPA-8260 NO 1 <br /> t-Amyl Methyl ether NO ug/L 0.50 0.25 EPA-8260 NO <br /> t-Butyl alcohol NO ug/L 10 9.4 EPA-8260 NO 1 <br /> Carbon disulfide NO ug/L 1.0 0.35 EPA-8260 NO 1 <br /> Chloroprene NO uglL 5.0 0.37 EPA-8260 NO 1 <br /> trans-1,4-Dichioro-2-butene - ND ug/L 5.0 1.4 EPA-8260 - NO 1 - <br /> Diisopropyl ether _-- NO ug/L 0.50 0.19 EPA-8260 NO 1 <br /> Ethanol _-- NO ug/L _ 250 45 EPA-8260 NO 1 <br /> Ethyl methacrylate _--_-__--ND _. ug/L .. 4.a-- os7 -EPA-x260 ---- �D <br /> Y cry 9 1 <br /> Ethyl t-butyl ether NO ug/L 0.50 0.18 EPA-8260 NO 1 <br /> Hexachloroethane -- NO ug/L 0.50 0.13 EPA-8260 NO 1 <br /> -.........--..... ------- <br /> 2-Hexanone NO ug/L 10 3.4 EPA-8260 NO 1 <br /> lsobutanoi NO ug/L 20 5.4 EPA-8260 NO 1 <br /> Methacrylonitrile NO ug/L 10 3.1 EPA-8260 NO 1 <br /> Methyl ethyl ketone NO ug/L 10 2.5 EPA-8260 NO 1 <br /> Methyl iodide NO ug/L 2.0 0.44 EPA-8260 NO 1 <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 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 alterafiort separation,detachment or third party interpretation <br /> 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.belabs.com Page 14 of 36 <br />