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i <br /> Laboratories, .ane. <br /> Environmental Testing Laboratory Since 1949 <br /> Project: NCYC Reported: 06(24/2008 10:54 <br /> Herst Associates <br /> 4630 South Highway 94 North Outer Road Project Number: [none] <br /> Saint Charles,MO 63304 Project Manager: David Vasbinder <br /> Volatile Organic Analysis (EPA Method 8260) <br /> BCL Sample ID: 0807993-02 Client Sample Name: Well#4 Duplicate,6/1812008 1:25:OOPM, David Vasbinder <br /> Prep Run Instru- QC MB Lab <br /> Constituent R@Stdlt Units PQL MDL Method Date Date/Time Anal st ment ID Dilution Batch ID Bias Qualls <br /> t-Butyl alcohol ND uglL 10 9.2 EPA-8260 06/23/08 06/23/08 16:23 MGC MS-V5 1 BRF1328 ND <br /> t' Carbon disulfide ND ug/L 1.0 0,40 EPA-8260 06/23108 06/23/08 16:23 MGC MS-V5 1 BRF1328 ND <br /> -- <br /> trans-1,4-Dichloro-2-butene ND ug/L 5.0 1.4 EPA 8260 06/23/08 06/23/08 16:23 MGC MS-V5 1 BRF1328 ND <br /> Diisopropyl ether ND ug/L 0.50 0.18 EPA 8260 06/23/08 06/23/08 16:23 MGC MS-V5 1 BRF1328 <br /> ND <br /> Ethanol ND ug/L 250 57 EPA 8260 06/23/08 06/23/08 16.23 MGC MS-V5 1 BRF1328 ND <br /> Ethyl t-butyl ether ND ug/L. 0.50 0.22 EPA 8260 06123108 06/23/08 16:23 MGC MS-V5 1 BRF1328 ND <br /> 2-Hexanone ND ug/L 10 2.5 EPA-8260 06/23/08 06/23/08 1623 MGC MS V5 1 BRF1328 NO <br /> Methyl ethyl ketone ND ug/L 10 2.4 EPA 8260 06/23/08 06/23/08 16:23 MGC MS-V5 1 BRF1328 ND <br /> Methyl iodide ND ug/L 2.0 0.42 EPA 8260 06/23/08 06/23/08 16:23 MGC MS-V5 1 BRF1328 ND <br /> Methyl isobutyl ketone ND ug/L 10 3.4 EPA-8260 06/23/08 06/23/08 16:23 MGC MS-V5 1 BRF1328 N <br /> Vinyl acetate ND ug/L 10 2.5 EPA-8260 06/23/08 06/23108 16:23 MGC MS-V5 1 BRF1328 ND <br /> 1,2-Dichloroethane-d4(Surrogate) 104 % 76-114 (LCL-UCL) EPA-8260 06/23/08 06/23/08 16:23 MGC MS-V5 1 BRF1328 <br /> Toluene-d8(Surrogate) 99.7 % 88-110 (LCL-UCL) EPA-8260 06/23/08 06/23/08 16:23 MGC MS-V5 1 BRF1328 <br /> 4-Bromofluorobenzene(Surrogate) 97.0 % 86-115 (LCL-UCL) EPA-8260 06/23/08 06/23/08 16:23 MGC MS-V5 1 BRF1328 <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 sport are for the exclusive use of the submitting;pane- BC Laboratories.Inc.assumes no responsibility for report alteration,separation,detachment or third party interpretation, <br /> ene+ %mann hrinhc rnm Page 9 of 36 <br />