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Laboratories Inc. Ad <br /> Environmental Testing Laboratory Since 1949 <br /> Horst Associates Project: NCYC Reported: 09/12/2008 11:00 <br /> 4630 South Highway 94 North Outer Road Project Number: NCYCC VOC Samples <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 QC TyE2 Result Level PQL Units Recoveg RPD Recoveg RPD Lab Qualls <br /> Benzene BR10710 BR10710-BS1 LCS 24.830 25.000 0.50 ug/L 99.3 70-130 <br /> Bromodichloromethane BR10710 BR10710-BS1 LCS 27.600 25.000 0.50 ug/L 110 70-130 <br /> Chlorobenzene BRIO710 BR10710-BSI LCS 27.980 25.000 0.50 ug/L 112 70-130 <br /> Chloroethane BR10710 BRI0710-BSI LCS 25.620 25.000 0.50 ug/L 102 70-130 <br /> - ------- --------.._. .-. <br /> .......... <br /> 1,4-Dichlorobenzene <br /> 1,4-Dichlorobenzene BR10710 BRI0710-BSI LCS 27.070 25.000 0.50 ug/L 108 70-130 <br /> 1,1-Dichloroethane BR10710 BRI0710-BSI LCS 25.940 25.000 0.50 ug/L 104 70-130 <br /> 1,1-Dichloroethene BR10710 BR10710-BS1 LCS 30.460 25.000 0.50 ug/L 122 70-130 <br /> Toluene BRIO710 BR10710-BSI LCS 26.750 25-000 0.50 ug/L 107 70-130 <br /> Trichloroethene BR10710 BR10710-BS1 LCS 25.320 25.000 0.50 ug/L 101 70-130 <br /> 1,2-Dichloroethane-i4(Surrogate) BR10710 BRIO710-BS1 LCS 10.510 10.000 ug/L 105 76-114 <br /> Toluene-d8(Surrogate) BR10710 BR10710-BS1 LCS 9.9400 10.000 ug/L 99.4 88-110 <br /> 4-Bromofluorobenzene(Surrogate) BR10710 BRI0710-B81 LCS 10.610 10.000 ug/L 106 86-115 <br /> The results in this report apply to the samples anal)ned in accordance with the chain of custody document_ This analytical report must be reproduced in its entirely. <br /> All results listed in this report are for the exclusive use of the submitting,Darty. BC Laboratories,Inc-assumes no responstbility 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 32 of 36 <br /> Certifications: California-ELAP Certification Number 1186; Nevada Administrative Code-NAC-445A <br />