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1 <br />00 <br />Laboratories Inc. <br />Environmental Testing Laboratory Since 1949 <br />Herst Associates Reported: 07/21/2010 16:44 <br />4630 South Highway 94 North Outer Road Project: NCYC <br />Saint Charles, MO 63304 Project Number: [none] <br />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 OC Sample ID Type Result Level Units Recovery RPD Recovery RPD Lab Cluals <br />' <br />QC Batch ID: BTG 1160 <br />Benzene <br />BTG1160-BS1 <br />LCS <br />23.840 <br />25.000 <br />ug/L <br />95.4 <br />70-130 <br />Bromodichloromethane <br />BTG1160-BS1 <br />LCS <br />21.930 <br />25.000 <br />ug/L <br />87.7 <br />70-130 <br />Chlorobenzene <br />BTG1160-BS1 <br />LCS <br />22.290 <br />25.000 <br />ug/L <br />89.2 <br />70-130 <br />Chloroethane <br />BTG1160-BSl <br />LCS <br />23.910 <br />25.000 <br />ug/L <br />95.6 <br />70-130 <br />1,4 -Dichlorobenzene <br />BTG1160-BSI <br />LCS <br />23.470 <br />25.000 <br />ug/L <br />93.9 <br />70- 130 <br />1,1-Dichloroethane <br />— BTG1160-BS1 <br />LCS <br />23.500 <br />25.000 <br />ug/L <br />94.0 <br />70-130 <br />1,1-Dichloroethene <br />BTG1160-BS1 <br />LCS <br />26.090 <br />25.000 <br />ug/L <br />104 <br />70-130 <br />Toluene <br />BTG1160-BS1 <br />LCS <br />22.960 <br />25.000 <br />ug/L <br />91.8 <br />70-130 <br />Trichloroethene <br />BTG1160-BS1 <br />LCS <br />23.700 <br />25.000 <br />ug/L <br />94.8 <br />70-130 <br />1,2-Dichloroethane-d4 (Surrogate) <br />BTG1160-BS1 <br />LCS <br />9.6800 <br />10.000 <br />ug/L <br />96.8 <br />76-114 <br />Toluene -d8 (Surrogate) <br />BTG 1160-BSl <br />LCS <br />10.030 <br />10.000 <br />ug/L <br />100 <br />88-110 <br />4-Bromofluorobenzene (Surrogate) <br />BTG1160-BS1 <br />LCS <br />10.600 <br />10.000 <br />ug/L <br />106 <br />86-115 <br />The results in this report apply to the sampler analyzed in accordance with The chain of custody document. This analytical report must be reproduced in its entirety. <br />' <br />All results listed in this report are <br />for the exclusive use of the submitting parry. BC Laboratories, <br />4100 Atlas Court Bakersfield, CA 93308 (661) <br />Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation. <br />327-4911 FAX (661) 327-1918 www.bclabs.com Page 27 29 <br />of <br />