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ill �La�btoratories, Inc.sting 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 - Laboratory Control Sample <br /> Control Limits <br /> Spike Percent Percent <br /> Constituent Batch ID QC Sample ID QCT Result Level PQL Units Recovery RPD Recoveg RPD Lab Quals <br /> Benzene BRG1228 BRG1228-BS1 LCS 28.532 25.000 0.50 ug/L 114 70-130 <br /> Bromodichloromethane BRG1228 BRG1228-BS1 LCS 26.470 25.000 0.50 ug/L 106 70-130 <br /> Chlorobenzene BRG1228 BRG1228-BS1 LCS 27.448 25.000 0.50 ug/L 110 <br /> 130 <br /> Chloroethane BRG1228 BRG1228-BS1 LCS 28.943 25.000 0.50 ug/L 116 70-130 <br /> 1,4-Dichlorobenzene BRG1228 BRG1228-BS1 LCS 26.764 25.000 0.50 ug/L 107 70-130 <br /> 1,1-Dichtoroethane BRG1228 BRG1228-BSI LCS 28.922 25.000 0.50 ug/L 116 70-130 <br /> 1,1-Dichloroethene BRG1228 BRG1228-BSI LCS 28.442 25.000 0.50 ug/L 114 70-130 <br /> Toluene BRG1228 BRG1228-BSI LCS 28.545 25.000 0.50 ug/L 114 70-130 <br /> __.._.--_—_..__ --- ._ <br /> — ,...---- <br /> Trichloroethene BRG1228 BRG1228-BS1 LCS 29.109 25.000 0.50 ug/L 116 70-130 <br /> 1,2-Dichloroethane-d4(Surrogate) BRG1228 BRG1228-BS1 LCS 10.060 10.000 ug/L 101 76-114 <br /> Toluene-d8(Surrogate) BRG1228 BRG1228-BSI LCS 9.8110 10.000 ug/L 98.1 88-110 <br /> 4-Bromoftuorobenzene(Surrogate) BRG1228 BRG1228-BS1 LCS 9.7146 10.000 ug/L 97.1 1 <br /> The results in this report appb,to the sampler 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 Lar report alteration,separation,detachment or third party interpretation. <br /> ..,... ,.__.._..� n._t......A...n 1+n CaIna 1991)Z97_AQ11 FAX tFR11 327-141ST www.br-labs.com Page 32 of 36 <br />