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LABORATORIES, INC. <br /> Herst Associates Project: Misc.Samples Reported: 09/24/2007 8:37 <br /> 4630 South Highway 94 North Outer Road Project Number: NCYC <br /> Saint Charles, MO 63304 Project Manager: David Vasbinder <br /> Volatile Organic Analysis (EPA Method 8260) <br /> BCL Sample ID: 0710769-05 Client Sample Name: CYA#2/WELL#2, 9/11/2007 9:05:OOAM, David Vasbinder <br /> Prep Run Instru- QC MB Lab <br /> Constituent Result Units PQL MDL Method Date Date/Time Analyst ment ID Dilution Batch ID Bias Quals <br /> t-Butyl alcohol ND ug/L 10 9.3 EPA-8260 09/18/07 09/19/07 05:41 MGC MS-V5 1 BQ10811 ND V11 <br /> Carbon disulfide ND ug/L 1.0 0.24 EPA-8260 09/18/07 09/19/07 05:41 MGC MS-V5 1 6010811 ND <br /> trans-1,4-0ichioro-2-butene ND ug/L 5.0 2.0 EPA-8260 09/18/07 09/19/07 05:41 MGC MS-V5 1 BQ10811 ND <br /> piisopropyl ether ND ug/L 0.50 0.34 EPA-8260 09/18/07 09/19/07 05:41 MGC MS-V5 1 BQ10811 ND <br /> Ethanol ND ug/L 250 57 EPA-8260 09/18/07 09/19/07 05:41 MGC MS-V5 1 BQ10811 ND <br /> Ethyl t-butyl ether ND ug/L 0.50 0.32 EPA-8260 09/18/07 09/19/07 05:41 MGC MS-V5 1 BQ10811 ND <br /> 2-Hexanone ND ug/L 10 2.2 EPA-8260 09/18/07 .09/19/07 05:41 MGC MS-V5 1 BQ10811 ND <br /> Methyl ethyl ketone ND ug/L 10 3.4 EPA-8260 09118/07 09/19/07 05:41 MGC MS-V5 i BQ10811 ND <br /> Methyl iodide ND ug/L 2.0 0.33 EPA-8260 09/18/07 09/19/07 05:41 MGC MS-V5 1 BQ10811 ND A40 <br /> Methyl isobutyl ketone ND ug/L 10 3.6 EPA-8260 09/18107 09/19/07 05:41 MGC MS-V5 1 BQ10811 ND <br /> Vinyl acetate ND ug/L 10 4.7 EPA-8260 09/18/07 09/19/07 05:41 MGC MS-V5 1 BQ10811 ND <br /> 1,2-Dichloroethane-d4(Surrogate) 110 % 76-114 (LCL-UCL) EPA-8260 09/18/07 09/19/07 05:41 MGC MS-V5 1 BQ10811 <br /> Toluene-d8(Surrogate) 100 % 88-110 (LCL-UCL) EPA-8260 09/18/07 09/19/07 05:41 MGC MS-V5 1 BQ10811 <br /> 4-13romofluorobenzene(Surrogate) 99.4 % 86- 115 (LCL-UCL) EPA-8260 09/18/07 09/19/07 05:41 MGG MS-V5 1 BQ10811 <br /> BC Laboratories The results in this report apply to the samples analysed in accordance with the chain of custody docmnent. This analytical report tnust 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. Page 17 of 32 <br /> 4100 Atlas Court•Bakersfield,CA 93308 m(661)327-4911 .FAX(661)327-1918•www.bclabs.com <br />