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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 Analvsis (ErPA Method260) <br /> BCL Sample ID: 0710769-04 Client Sample Name: Field Blank @ CYA#2, 9/11!2007 8:54: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 05:10 MGC MS-V5 1 BQ10811 ND V11 <br /> Carbon disulfide ND ug/L 1.0 0.24 EPA-8260 09/18/07 09/19107 05:10 MGC MS-VS 1 BQ10811 ND <br /> trans-1,4-Dichloro-2-butene ND ug/L 5.0 2.0 EPA-8260 09/18/07 09/19/07 05:10 MGC MS-V5 1 BQ10811 ND <br /> Diisopropyl ether ND ug/L 0.50 0.34 EPA-8260 09/18/07 09/19107 05:10 MGC MS-V5 1 BQ10811 ND <br /> Ethanol ND ug/L 250 57 EPA-8260 09/18/07 09119/07 05:10 MGC MS-V5 1 BQ10811 ND <br /> ... <br /> Ethyl t-butyl ether ND ug/L 0.50 0.32 EPA-8260 09/18/07 09/19/07 05.10 MGC MS-V5 1 BQ10811 ND <br /> 2-Hexanone ND ug/L 10 2.2 EPA-8260 09/18/07 09/19/07 05:10 MGC MS-V5 1 BQ10811 ND <br /> Methyl ethyl ketone ND ug/L 10 3.4 EPA-8260 09/18/07 09/19/07 05:10 MGC MS-V5 1 BQ10811 ND <br /> Methyl iodide ND ug/L 2.0 0.33 EPA-8260 09/18/07 09/19/07 05:10 MGC MS-V5 1 BQ10811 ND A40 <br /> Methyl isobutyl ketone ND ug/L 10 3.6 EPA-8260 09/18/07 09/19/07 05:10 MGC MS-V5 1 BQ10811 ND <br /> Vinyl acetate ND ug/L 10 4.7 EPA-8260 09/18/07 09/19/07 05:10 MGC MS-V5 1 BQ10811 ND <br /> 1,2-Dichioroethane-d4(Surrogate) 107 % 76-114 (LCL-UCL) EPA-8260 09/18/07 09/19/07 05:10 MGC MS-V5 1 BQ10811 <br /> Toluene-d8(Surrogate) 99.1 % 88-110 (LCL-UCL) EPA-8260 09/18/07 09/19/07 05:10 MGC MS-V5 1 B0I0811 <br /> 4-Bromefluoroberizene(Surrogate) 103 % 86-115 (LGL-UCL) EPA-8260 09/18/07 09/19/07 05:10 MGC MS-V5 1 BQ10811 <br /> BC Laboratories The results in this report apply to the samples analy.ed in accordance with the chain of custody-doctunent. This analytical report must he reproduced in its entrre4y <br /> All results listed in this report are for the exclusive use of the sabmitting party.BC Laboratories,inc.assumes no reswnsibility for report alicration,separation, detachment or third party interpretation. Page 14 of 32 <br /> I♦ ® At urt rsfie 93' +(661 4911 •FAX(661)327-191=ww.bel�abs.com <br />