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Laboratories Inc. <br /> Environmental Testing Laboratory Since 1949 <br /> Herst Associates Project: NCYC Reported: 01/11/2010 16:10 <br /> 4630 South Highway 94 North Outer Road Project Number: [none] <br /> Saint Charles,MO 63304 Project Manager: Erin Fanning <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 QC Type Result Level PQL Units Recovery RPD Recovery RPD Lab Quals <br /> 4-Bromofluorobenzene(Surrogate) BSL1460 BSL1460-BS1 LCS 9.5700 10.000 ug/L 95.7 86-115 <br /> Benzene BSL1778 BSL1778-BS1 LCS 25.620 25.000 0.50 ug/L 102 70-130 <br /> Bromodichloromethane BSL1778 BSL1778-BSI LCS 23.650 25.000 0.50 ug/L 94.6 70-130 <br /> Chlorobenzene BSL1778 BSL1778-BS1 LCS 25.000 25.000 0.50 ug/L 100 70-130 <br /> Chloroethane BSL1778 BSL1778-BS1 LCS 24.240 25.000 0.50 ug/L 97.0 70-130 <br /> 1,4-Dichlorobenzene BSL1778 BSL1778-BS1 LCS 24.010 25.000 0.50 ug/L 96.0 70-130 <br /> 1,1-Dichloroethane BSL1778 BSL1778-BS1 LCS 25.490 25.000 0.50 ug/L 102 70-130 <br /> 1,1-Dichloroethene BSL1778 BSL1778-BSI LCS 26.830 25.000 0.50 ug/L 107 70-130 <br /> Toluene BSL1778 BSL1778-BS1 LCS 24.990 25.000 0.50 ug/L 100 70-130 <br /> Trichloroethene BSL1778 BSL1778-BS1 LCS 26.980 25.000 0.50 ug/L 108 70-130 <br /> 1,2-Dichloroethane-d4(Surrogate) BSL1778 BSL1778-BS1 LCS 9.4200 10.000 ug/L 94.2 76-114 <br /> Toluene-d8(Surrogate) BSL1778 BSL1778-BS1 LCS 10.110 10.000 ug/L 101 88-110 <br /> 4-Bromofluorobenzene(Surrogate) BSL1778 BSL1778-BS1 LCS 9.8200 10.000 ug/L 98.2 86-115 <br /> The results in this report apply to the samples analyzed in accordance with the chain ojcustodv document.This analytical report most he reproduced in its entirety. <br /> All results listed in this repot 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 35 of 44 <br /> Certifications: California-ELAP Certification Number 1186; Nevada Administrative Code-NAC-445A <br />