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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 8260) <br /> BCL Sample ID: 0705704-01 Client Sample Name: Water Supply well#2,5/15/2007 9:30:OOAM,David Vasbinder <br /> Prep Run Instru• Qc MB Lab <br /> Constituent Result Units PQL MDL Method Date Date/time Analyst ment to Dilution Batch ID Bias Quaffs <br /> Acrylonitrile ND ug/L 5.0 2.0 EPA-8260 05/16/07 05/16/07 15:52 SVM MS-V4 1 BOE0962 <br /> t-Amyl Methyl ether ND ug/L 0.50 0.34 EPA-8260 05/16/07 05/16/07 15:52 SVM MS-V4 1 BQE0962 <br /> t-Butyl alwhol ND ug/L 10 9.3 EPA-8260 05/16/07 05/16/07 15:52 SVM MS-V4 1 BQE0962 <br /> Carbon disulfide ND ug/L 1.0 0.24 EPA-8260 05/16/07 05/16/07 15:52 SVM MS-V4 1 BQE0962 <br /> trans-1,4-Dichloro-2-butene ND ug/L 5.0 0.80 EPA-8260 05/16/07 05/16/07 15:52 SVM MS-V4 1 BOE0962 <br /> Diisopropyl ether ND ug/L 0.50 0.34 EPA-8260 05/16/07 05/16/07 15:52 SVM MS-V4 1 BQE0962 <br /> Ethanol ND ug/L 250 57 EPA-8260 05/16/07 05/16/07 15:52 SVM MS-V4 1 BQE0962 <br /> Ethyl t-butyl ether ND ug/L 0.50 0.32 EPA-8260 05/16/07 05/16/07 15:52 SVM MS-V4 1 BQE0962 <br /> 2-Hexanone ND ug/L 20 1.7 EPA-8260 05/16/07 05/16/07 15:52 SVM MS-V4 1 BQE0962 <br /> Methyl ethyl ketone ND ug/L 10 3.4 EPA-8260 05/16/07 05/16/07 15:52 SVM MS-V4 1 BOE0962 <br /> Methyl iodide ND ug/L 2.0 0.31 EPA-8260 05/16/07 05/16/07 15:52 SVM MS-V4 1 BQE0962 <br /> Methyl isobutyl ketone ND ug/L 10 3.6 EPA-8260 05/16/07 05/16/07 15:52 SVM MS-V4 1 BOE0962 <br /> Vinyl acetate ND ug/L 10 4.7 EPA-8260 05/16/07 05/16/07 15:52 SVM MS-V4 1 BQE0962 <br /> 1,2-Dichloroethane-d4(Surrogate) 95.1 / 76-114(LCL-UCL) EPA-8260 05/16/07 05/16/07 15:52 SVM MS-V4 1 BOE0962 <br /> Toluene-d8(Surrogate) 98.6 / 88-110(LCL-UCL) EPA-8260 05/16/07 05/16/07 15:52 SVM MS-V4 1 BQE0962 <br /> 4-Bromofluorobenzene(Surrogate) 97.2 / 86-115(LCL-UCL) EPA-8260 05/16/07 05/16/07 15:52 SVM MS-V4 1 BQE0962 <br /> BC Laboratories The mulls in this report apply to the samples analyzed in accordance with the chain of ewledy documera.This analytical report mast be reproduced in its entirety. <br /> Page 5 of 24 <br />