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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 to 260) <br /> BCL Sample ID: 0710769-06 Client Sample Name: CYA#4/WELL#4, 9/11/2007 9:20: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 06:12 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 06:12 MGC MS-V5 1 B010811 ND <br /> trans-1,4-Dichloro-2-butene ND ug/L 5.0 2.0 EPA-8260 09/18/07 09/19/07 06:12 MGC MS-V5 1 BQ10811 ND <br /> Diisopropyl ether ND ug/L 0.50 0.34 EPA-8260 09/18/07 09/19/07 06:12 MGC MS-V5 1 BQ10811 ND <br /> Ethanol ND ug/L 250 57 EPA-8260 09/18/07 09/19/07 06:12 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 06:12 MGC MS-V5 1 BQ10811 ND <br /> 2-Hexanone ND ug/L 10 2.2 EPA-8260 09/18/07 09/19/07 06,12 MGC MS-V5 1 BQ10811 ND <br /> Methyl ethyl ketone ND ug/L 10 3.4 EPA-8260 09/18/07 09/19/07 06:12 MGC MS V5 1 BQ10811 ND <br /> Methyl iodide ND ug/L 2.0 0.33 EPA-8260 09/18/07 09/19/07 06:12 MGC MS-V5 1 B010811 ND A40 <br /> _._ <br /> Methyl isobutyl ketone ND ug/L 10 3.6 EPA-8260 09/18/07 09/19/07 06:12 MGC MS V5 1 8010811 ND <br /> Vinyl acetate ND ug/L 10 4.7 EPA-8260 09/18/07 09/19/07 06.12 MGC MS-V5 1 BQ10811 ND <br /> 1,2-Dichloroethane-d4(Surrogate) 108 % 76-114 (LCL-UCL) EPA-8260 09/18/07 09/19/07 06:12 MGC MS-V5 1 BQ10811 <br /> Toluene-d8(Surrogate) 98.4 % 88-110 (LCL-UCL) EPA-8260 09/18/07 09/19/07 06:12 MGC MS-V5 1 13010811 <br /> 4-Bromofluorobenzene(Surrogate) 101 % 86-115 (LCL-UCL) EPA-8260 09/18/07 09/19/07 06:12 MGG MS-V5 1 BQ10811 <br /> BC Laboratories The results in this report apply to the samples analyzed in accordance with 1he chain of custody doctunent. This analytical report must he reproduced in its entire.4y <br /> All results listed in this report are for the exclusive use of the submitting party.BC Laboratories,lne.assumes no responsibility for report alteration,separation, detachment or third party interpretation. page 20 of 32 <br /> 0 ourt ersfi A 93" •(66I 4911 • X(661 327-1918•www.bclabs.com <br /> wlw . iri�ii iii � ® ® M M ® s: <br />