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ARM <br />__QWMD <br />Laboratories Inc. <br />Environmental Testing Laboratory Since 1949 <br />Geologic Associates Reported: 10/20/2011 16:54 <br />11415 West Bernardo Ct, Ste 200 Project: Corral Hollow EMP <br />San Diego, CA 92127 Project Number: 2011-0115 <br />Project Manager: John Hower <br />Volatile Organic Analysis (EPA Method 8260) <br />Quality Control Report - Laboratory Control Sample <br />Control Limits <br />Spike Percent Percent Lab <br />Constituent QC Sample ID Type Result Level Units Recovery RPD Recovery RPD Quals <br />QC Batch ID: BUJ1213 <br />Benzene <br />BUJ1213-BS1 <br />LCS <br />24.200 <br />25.000 <br />ug/L <br />96.8 <br />70-130 <br />Bromodichloromethane <br />BUJ1213-BS1 <br />LCS <br />25.870 <br />25.000 <br />ug/L <br />103 <br />70-130 <br />Chlorobenzene <br />BUJ1213-BS1 <br />LCS <br />24.600 <br />25.000 <br />ug/L <br />98.4 <br />70-130 <br />Chloroethane <br />BUJ1213-BS1 <br />LCS <br />24.510 <br />25.000 <br />ug/L <br />98.0 <br />70-130 <br />1,4 -Dichlorobenzene <br />BUJ1213-BS1 <br />LCS <br />26.030 <br />25.000 <br />ug/L <br />104 <br />70-130 <br />1,1-Dichloroethane <br />BUJ1213-BS1 <br />LCS <br />25.020 <br />25.000 <br />ug/L <br />100 <br />70-130 <br />1,1-Dichloroethene <br />BUJ1213-BS1 <br />LCS <br />25.060 <br />25.000 <br />ug/L <br />100 <br />70-130 <br />Toluene <br />BUJ1213-BS1 <br />LCS <br />23.310 <br />25.000 <br />ug/L <br />93.2 <br />70-130 <br />Trichloroethene <br />BUJ1213-BS1 <br />LCS <br />26.470 <br />25.000 <br />ug/L <br />106 <br />70-130 <br />1,2-Dichloroethane-d4 (Surrogate) <br />BUJ1213-BS1 <br />LCS <br />10.040 <br />10.000 <br />ug/L <br />100 <br />76-114 <br />Toluene -d8 (Surrogate) <br />BUJ1213-BS1 <br />LCS <br />9.6900 <br />10.000 <br />ug/L <br />96.9 <br />88-110 <br />4-Bromofluorobenzene (Surrogate) <br />BUJ1213-BS1 <br />LCS <br />10.360 <br />10.000 <br />ug/L <br />104 <br />86-115 <br />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 entirety. <br />All results listed in this report are <br />for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report <br />alteration, separation, detachment or third party interpretation. <br />4100 Atlas Court Bakersfield, CA 93308 <br />(661) 327-4911 FAX(661)327-1918 www.bGabs.com <br />Page 12 of 14 <br />