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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 <br /> Project Manager: Erin Fanning <br /> Volatile Organic Analysis (EPA Method 8260) <br /> Quality Control Report - Method Blank Analysis <br /> Constituent OC Sample ID MB Result Units POL MDL Lab Quals <br /> QC Batch ID: BTF1398 <br /> Benzene BTF1398-BLK1 NO ug/L 0.50 0.086 <br /> Bromochioromethane BTF1398-BLK1 NO ug/L 0.50 0.23 <br /> Bromodichloromethane -- - -- BTF139&BLK1 NO ug/L - 0.50 0.12 - - <br /> Bromoform BTF1398-BLK1 NO ug/L 0.50 0.23 <br /> Bromomethane BTF139B-BLK1 NO ug/L 1.0 0.20 <br /> ----------._._- <br /> Carbon tetrachloride BTF139&BLK1 NO ug/L 0.50 0.18 <br /> Chiorobenzene BTF1398-BLKI NO ug/L 0.50 0.081 <br /> Chloroethane STF1398-BLK1 NO - ug/L - 0.50 0_11-1---.. <br /> __. <br /> Chloroform BTF1398-BLK1 NO ug/L 0.50 0.072 <br /> Chloromethane -- -BTF1398-BLK1- NO ug/L 0.50`-- 0.11' ---- <br /> Dibromochioromethane N-- BTF1398-BLK1 NO ug/L 0.50- 0.077-- - <br /> 1,2-Dibromo-3-chloropropane BTF1398-BLK1 NO ugtL 1.0 0.44 <br /> 1,2-Dibromoethane BTF1398-BLK1 NO _ugh- -4_50 ... 0_16 <br /> Dibromomethane -_- - BTF1398-BLK1 - NO -- ug/L-„ 0.50 0.19 - <br /> 1,2-Dichlorobenzene BTF1398-BLK1 NO ug/L 0.50 0.068 <br /> 1,3-Dichlorobenzene -^ ----- _.._ BTF1398-BLK1 ND ug/L -- 0.50 -`-^0.060 ----- <br /> 1,4-Dichlorobenzene- - -----BTF1398-BLK1 NO -m --- uglL -T-0.50 0A83 - <br /> Dichlorodifluoromethane BTF139&BLK1 NO ug/L 0.50 0.11 --_- <br /> 1,1-Dichloroethane - -BTF139&BLK1 NO ugtL - 0.50 0.081 <br /> 1,2-Dichloroethane BTF1398-BLK1 NO -- ug/L - -0.50 0.14 ---- <br /> 1,1-Dichioroethene BTF1398-BLK1 NO - ug/L 0.50 0.12 -...- <br /> cis-1,2-Dichloroethene BTF1398-BLK1 NO ug/L 0.50 0.11 <br /> trans-l,2-Dichloroethene - BTF1398-BLK1 NO ug/L 0.50 0.097_ -- <br /> 1,2-Dichloropropane BTF1398-BLK1 NO ug/L 0.50 0.12 <br /> 1,3-Dichioropropane BTF1398-BLK1 NO ug/L 0.50 0.099 <br /> i,2-Dichioropropane BTF1398-BLK1 NO ug/L 0.50 0.11 <br /> 1,1-Dichloropropene ------ BTF1398-BLK1 NO - -ug/L --050 --0.11 <br /> cis-1,3-Dichtoropropene --- BTF1398-BLK1 - NO ug/L - - 0.50 0.098 <br /> trans-1,3-Dichloropropene BTF1398-BLK1 NO ug/L 0.50 0.079 <br /> Ethylbenzene BTF1398-BLK1 NO ug/L 0.50 0.12 <br /> Hexachlorobutadiene BTF1398-BLK1 NO - ug/L --0.50 --- 0.12 <br /> ---.-_e chloride <br /> BTF1398-BLK1 - NO ugh ---- 1. <br /> 0.50 <br /> Methylene chloride - BTF139&BLK1 NO u9n- 1.0 _ <br /> Naphthalene ---.-_.. 0-- 0.36 _ -- <br /> Styrene - BTF139&BLK1 NO ug/L 0.50 `---0A93 <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 alteration.separation,detachment or third party interpretation <br /> 4100 Atlas Court Bakersfield,CA 93308 (661)3274911 FAX(661)327-1918 www.brAabs.com Page 31 of 36 <br />