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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 /> Benzene BSL1368 BSL1368-BS1 LCS 25.060 25.000 0.50 ug/L 100 70-130 <br /> Bromodichloromethane BSL1368 BSL1368-BS1 LCS 25.590 25.000 0.50 ug/L 102 70-130 <br /> Chlorobenzene BSL1368 BSL1368-BSI LCS 25.570 25.000 0.50 ug/L 102 70-130 <br /> Chloroethane BSL1368 BSL1368-BS1 LCS 18.760 25.000 0.50 ug/L 75.0 70-130 <br /> 1,4-Dichlorobenzene BSL1368 BSL1368-BS1 LCS 25.270 25.000 0.50 ug/L 101 70-130 <br /> 1,1-Dichloroethane BSL1368 BSL1368-BS1 LCS 24.180 25.000 0.50 ug/L 96.7 70-130 <br /> 1,1-Dichloroethene BSL1368 BSL1368-BS1 LCS 27.820 25.000 0.50 ug/L 111 70-130 <br /> Toluene BSL1368 BSL1368-BSI LCS 25.100 25.000 0.50 ug/L 100 70-130 <br /> Trichloroethene BSL1368 BSL1368-BS1 LCS 26.260 25.000 0.50 ug/L 105 70-130 <br /> 1,2-Dichloroethane-d4(Surrogate) BSL1368 BSL1368-BS1 LCS 10.330 10.000 ug/L 103 76-114 <br /> Toluene-d8(Surrogate) BSL1368 BSL1368-BS1 LCS 10.190 10.000 ug/L 102 88-110 <br /> 4-Bromofluorobenzene(Surrogate) BSL1368 BSL1368-BS1 LCS 10.360 10.000 ug/L 104 86-115 <br /> Benzene BSL1460 BSL1460-BSI LCS 22.740 25.000 0.50 ug/L 91.0 70-130 <br /> Bromodichloromethane BSL1460 BSL1460-BS1 LCS 23.430 25.000 0.50 ug/L 93.7 70-130 <br /> Chlorobenzene BSL1460 BSL1460-BS1 LCS 23.970 25.000 0.50 ug/L 95.9 70-130 <br /> Chloroethane BSL1460 BSL1460-BS1 LCS 19.510 25.000 0.50 ug/L 78.0 70-130 <br /> 1,4-Dichlorobenzene BSL1460 BSL1460-BS1 LCS 24.760 25.000 0.50 ug/L 99.0 70-130 <br /> 1,1-Dichloroethane BSL1460 BSL1460-BSI LCS 24.060 25.000 0.50 ug/L 96.2 70-130 <br /> 1,1-Dichloroethene BSL1460 BSL1460-BS1 LCS 28.980 25.000 0.50 ug/L 116 70-130 <br /> Toluene BSL1460 BSL1460-BS1 LCS 24.570 25.000 0.50 ug/L 98.3 70-130 <br /> Trichloroethene BSL1460 BSL1460-BS1 LCS 26.560 25.000 0.50 ug/L 106 70-130 <br /> 1,2-Dichloroethane-d4(Surrogate) BSL1460 BSL1460-BS1 LCS 7.7000 10.000 ug/L 77.0 76-114 <br /> Toluene-d8(Surrogate) BSL1460 BSL1460-BS1 LCS 9.7800 10.000 ug/L 97.8 88-110 <br /> The results in this report app/v to the sampIcs analyzed in accordance with the chain of cuslodv document.This analytical report must he reproduced in its entirely. <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 34 of 44 <br /> Certifications: California-ELAP Certification Number 1186; Nevada Administrative Code-NAC-445A <br />