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M M M ! M ® M M M M M ® ® ® M M ® t/ <br /> —M <br /> LABORATORIES, INC. <br /> Herst Associates Project: NCYC Reported: 02/01/2008 12:10 <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 QC Type Result Level PQL Units Recovery RPD Recovery RPD Lab Quals <br /> 4-Bromofluorobenzene(Surrogate) BRA1087 BRA1087-BSI LCS 9.3200 10.000 ug/L 93.2 86-115 <br /> Benzene BRA1769 BRA1769-BS1 LCS 22.468 25.000 0.50 ug/L 89.9 70-130 <br /> Bromodichloromethane BRA1769 BRA1769-BS1 LCS 24.543 25.000 0.50 ug/L 98.2 70-130 <br /> Chlorobenzene BRA1769 BRA1769-BS1 LCS 24.666 25.000 0.50 ug/L 98.7 70-130 <br /> Chloroethane BRA1769 BRA1769-BS1 LCS 22.988 25.000 0.50 ug/L 92.0 70-130 <br /> 1,4-Dichlorobenzene BRA1769 BRA1769-BS1 LCS 25.927 25.000 0.50 ug/L 104 70-130 <br /> 1,1-Dichloroethane BRA1769 BRA1769-BS1 LCS 22.826 25.000 0.50 ug/L 91.3 70-130 <br /> 1,1-Dichloroethene BRA1769 BRA1769-BS1 LCS 23.619 25.000 0.50 ug/L 94.5 70-130 <br /> Toluene BRA1769 BRA1769-BSI LCS 24.508 25.000 0.50 ug/L 98.0 70-130 <br /> Trichloroethene BRA1769 BRA1769-BSI LCS 24.180 25.000 0.50 ug/L 96.7 70-130 <br /> 1,2-Dichloroethane-d4(Surrogate) BRA1769 BRA1769-BS1 LCS 9.2732 10.000 ug/L 92.7 76-114 <br /> Toluene-d8(Surrogate) BRA1769 BRA1769-BS1 LCS 9.7187 10.000 ug/L 97.2 88-110 <br /> 4-Bromofluorobenzene(Surrogate) BRA1769 BRA1769-BS1 LCS 10.015 10.000 ug/L 100 86-115 <br /> BC Laboratories 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 entireiy <br /> All results listed in this report are ror the exclusive use of the submitting party.BC Laboratories,Inc.assumes no responsibility I'or report alteration,separation, detachment or third party interpretation. Page 34 of 43 <br /> 4100 Atlas Court-Bakersfield,CA 93308 -(661)327-4911 •FAX(661)327-1918 -www.bclabs.com <br />