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0 <br />Alpha PAnalytical Laboratories Inc. e-mail: clientservices@alpha-labs.com <br />CHEMICAL EXAMINATION REPORT Pate 50 of 68 <br />URS Corp - Sac <br />2870 Gateway Oaks Dr., Suite 300 <br />Sacramento, CA 95833 <br />Attn: Chani Leimbach <br />Order Number Receipt Date/Time Client Code <br />07JO347 10/06/2007 13:00 URS -SAC <br />Report Date: 10/22/07 07:24 <br />Project No: 18600251.02041 <br />Project ID: DTSC FMS24 Phase 2 <br />Client PO/Reference <br />Volatile Organic Compounds by EPA Method 8260B - Quality Control <br />Spike Source a/aREC RPD <br />Analyte(s) Result PQL Units Level Result °/uREC Limits RPD Limit Flag <br />Batch AJ71626 - VOAs in Water GCMS <br />Matrix Spike (AJ71626-MSI) <br />Source: 07J0416-01 <br />Prepared &Analyzed: 10/15/07 <br />Bromobenzene <br />11.4 <br />0.50 <br />10.0 <br />ND <br />114 <br />65-135 <br />Bromochloromethme <br />9.95 <br />0.50 <br />10.0 <br />ND <br />99.5 <br />69-131 <br />Bro dichloromethane <br />10.0 <br />0.50 <br />10.0 <br />ND <br />100 <br />62-140 <br />Br rm <br />12.3 <br />0.50 <br />10.0 <br />ND <br />123 <br />55-151 <br />Bromomethane <br />9.35 <br />0.50 <br />10.0 <br />ND <br />93.5 <br />43-162 <br />n-Butylbenzene <br />9.87 <br />0.50 <br />10.0 <br />ND <br />98.7 <br />74-138 <br />sec-Butylbenzene <br />11.8 <br />0.50 <br />10.0 <br />ND <br />118 <br />78-145 <br />tert-Butylbenzene <br />11.3 <br />0.50 <br />10.0 <br />ND <br />113 <br />71-139 <br />Carbon tetrachloride <br />9.95 <br />0.50 <br />10.0 <br />ND <br />99.5 <br />65-153 <br />Chlorobenzene <br />10.5 <br />0.50 <br />10.0 <br />ND <br />105 <br />57-136 <br />Chloroethane <br />9.44 <br />0.50 <br />10.0 <br />ND <br />94.4 <br />62-142 <br />Chloroform <br />9.52 <br />0.50 <br />10.0 <br />ND <br />951 <br />36-151 <br />Chloromethane <br />9.73 <br />0.50 <br />10.0 <br />ND <br />97.3 <br />69-149 <br />2-Chlorotoluene <br />12.6 <br />0.50 <br />10.0 <br />ND <br />126 <br />70-137 <br />4-Chlorotoluene <br />10.9 <br />0.50 <br />10.0 <br />ND <br />109 <br />50-134 <br />Dibromochloromethane <br />11.8 <br />0.50 <br />10.0 <br />ND • <br />118 <br />62-141 <br />1,2-Dibromo-3-chloropmpme <br />9.73 <br />0.50 <br />10.0 <br />ND <br />97.3 <br />59-134 <br />1,2-Dibromoethane (EDB) <br />10.8 <br />0.50 <br />10.0 <br />ND <br />108 <br />40-147 <br />Dibromomethane <br />9.44 <br />0.50 <br />10.0 <br />ND <br />94.4 <br />65-129 <br />12 -Dichlorobenzene <br />10.4 <br />0.50 <br />10.0 <br />ND <br />104 <br />57-137 <br />1,3 -Dichlorobenzene <br />10.4 <br />0.50 <br />10.0 <br />ND <br />104 <br />65-131 <br />1,4 -Dichlorobenzene <br />9.85 <br />.0-50 <br />10.0 <br />ND <br />98.5 <br />61-131 <br />Dichlorodifluoromethane <br />9.43 <br />0.50 <br />10.0 <br />ND <br />94.3 <br />63-177 <br />1,1-Dichloroethme <br />9.83 <br />0.50 <br />10.0 <br />ND <br />98.3 <br />64-136 <br />1,2-Dichloroethme <br />9.31 <br />0.50 <br />10.0 <br />ND <br />93.1 <br />62-126 <br />The results in this report apply to the samples analyzed to accordance with the chain <br />ojoy document. This analytical report must be reproduced in its entirety. <br />Bruce Gove 10/22/2007 <br />Laboratory Director <br />Corporate: 208 Mason St., Ukiah, CA 95482 • Phone: (707) 468-0401 • Fax: (707) 468-5267 <br />Service Center: 6398 Dougherty Rd., Suite 3, Dublin, CA 94568 • Phone: (925) 828-6226 • Fax: (925) 828-6309 <br />