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M ® M M M M M ® M M ® ® ® M M <br /> Herst Associates Project: Misc.Samples Reported: 05/23/2007 13:28 <br /> 4630 South Highway 94 North Outer Road Project Number: NCYC Tank 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: 0705705-01 Client Sample Name: Field blank @ North storage,5/14/2007 8:35:OOAM <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 05/16/07 05/16/07 15:37 MWB MS-V9 1 BQE1046 ND <br /> t-Amyl Methyl ether ND ug/L 0.50 0.34 EPA-8260 05/16/07 05/16/07 15:37 MWB MS-V9 1 BQE1046 ND <br /> t-Butyl alcohol ND ug/L 10 9.3 EPA-8260 05/16/07 05/16/07 15:37 MWB MS-V9 1 BQE1046 ND <br /> Carbon disulfide ND ug/L 1.0 0.24 EPA-8260 05/16/07 05/16/07 15:37 MWB MS-V9 1 BQE1046 ND <br /> trans-1,4-Dichloro-2-butene ND ug/L 5.0 0.80 EPA-8260 05/16/07 05/16/07 15:37 MWB MS-V9 1 BQE1046 ND V11 <br /> Diisopropyl ether ND ug/L 0.50 0.34 EPA-8260 05/16/07 05/16/07 15:37 MWB MS-V9 1 BQE1046 ND <br /> Ethanol ND ug/L 250 57 EPA-8260 05/16/07 05/16/07 15:37 MWB MS-V9 1 BQE1046 ND <br /> Ethyl t-butyl ether ND ug/L 0.50 0.32 EPA-8260 05/16/07 05/16/07 15:37 MWB MS-V9 1 BQE1046 ND <br /> 2-Hexanone ND ug/L 20 1.7 EPA-8260 05/16/07 05/16/07 15:37 MWB MS-V9 1 BQE1046 ND <br /> Methyl ethyl ketone ND ug/L 10 3.4 EPA-8260 05/16/07 05/16/07 15:37 MWB MS-V9 1 BQE1046 ND <br /> Methyl iodide ND ug/L 2.0 0.31 EPA-8260 05/16/07 05/16/07 15:37 MWB MS-V9 1 BQE1046 ND V11 <br /> Methyl isobutyl ketone ND ug/L 10 3.6 EPA-8260 05/16/07 05/16/07 15:37 MWB MS-V9 1 BQE1046 ND <br /> Vinyl acetate ND ug/L 10 4.7 EPA-8260 05/16/07 05/16/07 15:37 MWB MS-V9 1 BQE1046 ND V11 <br /> 1,2-Dichloroethane-d4(Surrogate) 105 % 76-114 (LCL-UCL) EPA-8260 05/16/07 05/16/07 15:37 MWB MS-V9 1 BQE1046 <br /> Toluene-d8(Surrogate) 102 % 88-110 (LCL-UCL) EPA-8260 05/16/07 05/16/07 15:37 MWB MS-V9 1 BQE1046 <br /> 4-Bromofluorobenzene(Surrogate) 103 % 86-115 (LCL-UCL) EPA-8260 05/16/07 05/16/07 15:37 MWB MS-V9 1 BQE1046 <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 /> Page 5 of 37 <br />