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Laboratories, Inc.- <br /> Environmental Testing Laboratory Since 1949 <br /> Herst Associates Project: NCYC Reported: 07/21/2008 16:37 <br /> 4630 South Highway 94 North Outer Road Project Number* [none] <br /> Saint Charles,MO 63304 Project Manager: David Vasbinder <br /> Volatile Organic Analysis (EPA Method 8260) <br /> Quality Control Report - Method Blank Analysis <br /> Constituent Batch ID OC Sample ID MB Result Units PQL MDL Lab Quals <br /> trans-1,4-Dchloro-2-butene BRG1228 BRG1228-BLK1 ND ugfL 5.0 1.4 <br /> Dilsopropyl ether BRG1228 BRG1228-BLKI ND ug/L 0.50 0.18 <br /> EthanolBRG1228 BRG1228-BLKI ND ug/L 250 57 <br /> .......... <br /> Ethyl 11-butyl ether BRG1228 BRG1228-BLKI ND ug/L 0,50 0.22 <br /> --—-—------------ <br /> 2-Hexanone BRG1228 BRG1228-BLKI ND ug/L 10 Z5 <br /> Methyl ethyl ketoneBRG1228 BRGM8-BLKI ND ug/L 10 2.4 <br /> -—---------- <br /> Methyl iodide BRG1228 BRG1228-BLKI ND ug/L 2.0 0.42 <br /> Methyl isobutyl ketone BRG1228 BRG1228-BLK1 ND ug/L 10 3.4 <br /> Vinyl acetate BRG1228 BRG1228-BLKI ND ug/L 10, 2.5 <br /> 1,2-Dichloroethane-d4(Surrogate) BRG1228 BRG1228-BLKI 94.1 76-114 (LCL-UCL) <br /> Toluene-d8(Surrogate) BRG1228 BRG1228-BLKI 102 % 88-110 (LCL-UCL) <br /> ........... <br /> 4-Bromofluorobenzene(Surrogate) BRG1228 BRG1228-BLKI 93.6 % 86-115 (LCL-UCL) <br /> ........... <br /> 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 entirely. <br /> BC Laboratories,Inc.assumes no resDonsibilitv for report alteration,separation,detachment or third party interpretation, <br /> All results listed in this report are for the exclusive use of the submitting party. Page 35 of 36 <br /> nn nzzna frV4%'W>7-AG1I FAX MAI�RWAQIA %mvjw hr.lqhr r.nm <br />