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Herst Associates Project: Misc.Samples Reported: 05/23/2007 13:27 <br /> 4630 South Highway 94 North Outer Road Project Number: NCYC Well Sample <br /> North Outer Rd. Project Manager: David Vasbinder <br /> Saint Charles,MO 63304 <br /> Volatile Organic Analysis (EPA Method ) <br /> BCL Sample ID: 0705704-04 Client Sample Name: Water supply#4 Duplicate,5/15/2007 11:50:OOAM,David Vasbinder <br /> Prep Run Instru- QC MB Lab <br /> Constituent Result Units PQL MDL Method Date Date/rime Analyst ment ID Dilution Batch ID Bias Quals <br /> Acrylonitrile NO ug/L 5.0 2.0 EPA-8260 05/16/07 05/16/07 17:07 SVM MS-V4 1 BQE0962 <br /> t-Amyl Methyl ether NO ug/L 0.50 0.34 EPA-8260 05/16/07 05/16/07 17:07 SVM MS-V4 1 BQE0962 <br /> t-Butyl alcohol NO ug/L 10 9.3 EPA-8260 05/16/07 05/16/07 17:07 SVM MS-V4 1 BQE0962 <br /> Carbon disulfide NO ug/L 1.0 0.24 EPA-8260 05/16/07 05/16/07 17:07 SVM MS-V4 1 BQE0962 <br /> trans-1,4-Dichloro-2-butene NO ug/L 5.0 0.80 EPA-8260 05/16/07 05/16/07 17:07 SVM MS-V4 1 BOE0962 <br /> Diisopropyl ether NO ug/L 0.50 0.34 EPA-8260 05/16/07 05/16/07 17:07 SVM MS-V4 1 BQE0962 <br /> Ethanol NO ug/L 250 57 EPA-8260 05/16/07 05/16/07 17:07 SVM MS-V4 1 BQE0962 <br /> Ethyl t-butyl ether NO ug/L 0.50 0.32 EPA-8260 05/16/07 05/16/07 17:07 SVM MS-V4 1 BQE0962 <br /> 2-Hexanone NO ug/L 20 1.7 EPA-8260 05/16/07 05/16/07 17:07 SVM MS-V4 1 BOE0962 <br /> Methyl ethyl ketone NO ug/L 10 3.4 EPA-8260 05/16/07 05/16/07 17:07 SVM MS-V4 1 BQE0962 <br /> Methyl iodide NO ug/L 2.0 0.31 EPA-8260 05/16/07 05/16/07 17:07 SVM MS-V4 1 BQE0962 <br /> Methyl isobutyl ketone NO ug/L 10 3.6 EPA-8260 05/16/07 05/16/07 17:07 SVM MS-V4 1 BQE0962 <br /> Vinyl acetate NO ug/L 10 4.7 EPA-8260 05/16/07 05/16/07 17:07 SVM MS-V4 1 BQE0962 <br /> 1,2-Dichloroethane-d4(Surrogate) 93.9 / 76-114(LCL-UCL) EPA-8260 05/16/07 05/16/07 17:07 SVM MS-V4 1 SOE0962 <br /> Toluene-d8(Surrogate) 97.5 / 88-110(LCL-UCL) EPA-6260 05/16/07 05/16/07 17:07 SVM MS-V4 1 BQE0962 <br /> 4-Bromofluombenzene(Surrogate) 97.0 % 86-115(LCL-UCL) EPA-8260 05/16/07 05/16/07 17:07 SVM MS-V4 1 BQE0962 <br /> BC Laboratories The results in/his report apply to the samples analyzed in accordance with the chain of custody document.This analytical report must be rprodeced in its enfirety. <br /> Page 14 of24 <br />