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Alpha (Analytical Laboratories Inc. <br />e-mail: clientservices@alpha-labs.com <br />CHEMICAL EXAMINATION REPORT <br />URS Corp -Sac <br />2870 Gateway Oaks Dr., Suite 300 <br />Report Date: 10/22/07 07:09 <br />Sacramento, CA 95833 <br />Attn: Chani Leimbach Project No: 18600251.02041 <br />Project ID: DTSC FMS24 Phase 2 <br />Order Number Receipt Date/rime <br />Client Code <br />0770352 10/06/2007 13:00URS-SAC Client PO/Reference <br />Volatile Organic Compounds by EPA Method 8260B - Quality Control <br />Analyte(s) <br />ResultSpike <br />PQL Units <br />Level <br />urce <br />Result <br />%REC <br />O/oREC <br />Limits <br />RPD <br />Batch AJ71206 - VOAs in Water GCMS <br />RPD <br />Limit <br />Matrix Spike Du AJ71206-MSDl <br />2-Chlorotoluene <br />Source: 07J0309.01 <br />Prepared: <br />10/10/07 <br />Anal <br />Analyzed: <br />10/11/07 <br />10.4 <br />4-Chlorotolume <br />0.50 <br />10.0 <br />ND <br />104 <br />70-137 <br />0.957 <br />25 <br />Dibromochloromethme <br />10.8 <br />0.50 " <br />10.0 <br />ND <br />108 <br />50-134 <br />0.930 <br />25 <br />1,2-Dibromo-3-chloropropane <br />11.3 <br />0.50 <br />10.0 <br />ND <br />113 <br />62-141 <br />3.60 <br />25 <br />1,2-Dibromoethane (EDB) <br />12.0 <br />11.0 <br />0.50 " <br />10.0 <br />ND <br />120 <br />59-134 <br />6.01 <br />25' <br />Dibromomethane <br />0.50 <br />10.0 <br />ND <br />110 <br />40-147 <br />4.65 <br />25 <br />1,2 -Dichlorobenzene <br />11.5 <br />0.50 " <br />10.0 <br />ND <br />115 <br />65-129 <br />1.75 <br />25 <br />1,3 -Dichlorobenzene <br />11.0 <br />0.50 <br />10.0 <br />ND <br />110 <br />57-137 <br />4.65 <br />25 <br />1,4 -Dichlorobenzene <br />10.7 <br />10.5 <br />0.50 " <br />10.0 <br />ND <br />107 <br />65-131 <br />0.939 <br />25 <br />Dichlorodifluoromethane <br />16.6 <br />0.50 " <br />10.0 <br />ND <br />105 <br />61-131 <br />1.92 <br />25 <br />1,1-Dichlorcethane <br />11.6 <br />0.50 " <br />10.0 <br />ND <br />166 <br />63-177 <br />4.31 <br />25 <br />1,2-Dichloroethaoe <br />10.7 <br />0.50 <br />10 0 <br />ND <br />116 <br />64-136 <br />531 <br />25 <br />1,1-Dichloroethene <br />0.50 <br />10.0 <br />ND <br />107 <br />62-126 <br />1.89 <br />25 <br />cis-1,2-Dichloroethene <br />13.0 <br />12.0 <br />0.50 " <br />10.0 <br />ND <br />130 <br />45-1780.772 <br />25 <br />trans-1,2-Dichloroethene <br />11.3 <br />0.50 ^ <br />10.0 <br />ND <br />120 <br />66-141 <br />1.68 <br />1.68 <br />25 <br />1,2-Dichloropropme <br />11.4 <br />0.50 <br />10.0 <br />ND <br />113 <br />59-I51 <br />0.889 <br />25 <br />1,3-Dichlompropme <br />10.8 <br />0.50 " <br />10.0 <br />ND <br />114 <br />62-128 <br />4.48 <br />25 <br />2,2-Dichloropropane <br />8.89 <br />0.50 <br />10.0 <br />ND <br />108 <br />67-126 <br />3.77 <br />25 <br />1,1•Dichloropropene <br />11.6 <br />0.50 " <br />10.0 <br />ND <br />71-135 <br />4.84 <br />25 <br />cis-1,3-Dichloropropene <br />111 <br />0.50 <br />10.0 <br />ND <br />116 <br />116 <br />71-135 <br />0.866 <br />25 <br />trans-1,3-Dichloropropene <br />10.4 <br />0.50 ^ <br />10.0 <br />ND <br />112 <br />50-140 <br />3.64 <br />25 <br />Ethylbenzene <br />11.4 <br />0.50 " <br />10.0 <br />ND <br />104 <br />55-126 <br />5.43 <br />25 <br />Hexachlorobutadiene <br />9.69 <br />. 0.50 " <br />10.0 <br />ND <br />114 <br />48-153 <br />3.57 <br />25 <br />Isopropylbenzene <br />0.50 <br />10.0 <br />ND <br />96.9 <br />70-147 <br />1.66 <br />25 <br />p-Isopropyltolueae <br />10.4 <br />0.50 " <br />10.0 <br />ND <br />104 <br />65-128 <br />2.93 <br />25 <br />10.7 <br />0.50 " <br />10.0 <br />ND <br />107 <br />70-132 <br />0.00 <br />25 <br />The resales in this report apply to the s les analyi d <br />Page 36 of 50 <br />Flag <br />amp e m accordance with the chain <br />ojcartody document. This amalyttcal report must be reproduced in its entirety. <br />Bruce Gove <br />Director <br />Corporate: 208 Mason St., Ukiah, CA 95482 • Phone: (707)t468-0401 • Fax: (707) 468-5267 10/22/2007 <br />Service Center: 6398 Dougherty Rd., Suite 3, Dublin, CA 94568 • Phone: (925) 828-6226 • Fax: (925) 828-6309 <br />