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LABORATORIES, INC. <br /> Herst Associates Project: Misc. Samples Reported: 06/29/2007 11:04 <br /> 4630 South Highway 94 North Outer Road Project Number: NCYC VOC Samples <br /> North Outer Rd. Project Manager: David Vasbinder <br /> Saint Charles, MO 63304 <br /> Volatile Organic Analysis (EPA Method 8260) <br /> BCL Sample ID: 0707098-03 Client Sample Name: Field Blank @ Water Supply Well #4/CYA#4,6/20/2007 8:00:00AM, 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 /> Acrylonitrile ND ug/L 5.0 2.0 EPA-8260 06/21/07 06/21/07 23:45 SVM MS-V4 1 BQF0932 ND <br /> t-Amyl Methyl ether ND ug/L 0.50 0.34 EPA-8260 06/21/07 06/21/07 23:45 SVM MS-V4 1 BQF0932 ND <br /> t-Butyl alcohol 54 ug/L 10 9.3 EPA-8260 06/21/07 06/21/07 23:45 SVM MS-V4 1 BQF0932 ND <br /> Carbon disulfide ND ug/L 1.0 0.24 EPA-8260 06/21/07 06/21/07 23:45 SVM MS-V4 1 BQF0932 ND <br /> trans-1,4-Dichloro-2-butene ND ug/L 5.0 2.0 EPA-8260 06/21/07 06/21/07 23:45 SVM MS-V4 1 BQF0932 ND <br /> Diisopropyl ether ND ug/L 0.50 0.34 EPA-8260 06/21/07 06/21/07 23:45 SVM MS-V4 1 BQF0932 ND <br /> Ethanol ND ug/L 250 57 EPA-8260 06/21/07 06/21/07 23:45 SVM MS-V4 1 BQF0932 ND <br /> Ethyl t-butyl ether ND ug/L 0.50 0.32 EPA-8260 06/21/07 06/21/07 23:45 SVM MS-V4 1 BQF0932 ND <br /> 2-Hexanone ND ug/L 20 2.2 EPA-8260 06/21/07 06/21/07 23:45 SVM MS-V4 1 BQF0932 ND <br /> Methyl ethyl ketone ND ug/L 10 3.4 EPA-8260 06/21/07 06/21/07 23:45 SVM MS-V4 1 BQF0932 ND <br /> Methyl iodide ND ug/L 2.0 0.33 EPA-8260 06/21/07 06/21/07 23:45 SVM MS-V4 1 BQF0932 ND <br /> Methyl isobutyl ketone ND ug/L 10 3.6 EPA-8260 06/21/07 06/21/07 23:45 SVM MS-V4 1 BQF0932 ND <br /> Vinyl acetate ND ug/L 10 4.7 EPA-8260 06/21/07 06/21/07 23:45 SVM MS-V4 1 BQF0932 ND <br /> 1,2-Dichloroethane-d4(Surrogate) 98.8 % 76-114 (LCL-UCL) EPA-8260 06/21/07 06/21/07 23:45 SVM MS-V4 1 BQF0932 <br /> Toluene-d8(Surrogate) 98.6 % 88-110 (LCL-UCL) EPA-8260 06/21/07 06/21/07 23:45 SVM MS-V4 1 BQF0932 <br /> 4-Bromofluorobenzene(Surrogate) 96.1 % 86-115 (LCL-UCL) EPA-8260 06/21/07 06/21/07 23:45 SVM MS-V4 1 BQF0932 <br /> BC Laboratories The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must 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. <br /> 4100 Atlas Court•Bakersfield,CA 93308 •(661)327-4911 •FAX(661)327-1918 •www.bclabs.com Page s of 30 <br />