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Alpha VAnalyticaI Laboratories Inc. e-mail: clientservices@alpha-labs.com <br />CHEMICAL EXAMINATION REPORT Page 36 of 50 <br />URS Corp - Sac <br />2870 Gateway Oaks Dr., Suite 300 <br />Sacramento, CA 95833 <br />Attn: Chani Leimbach <br />Order Number <br />07JO352 <br />Receipt Date/Time <br />10/06/2007 13:00 <br />Report Date: 10/22/07 07:09 <br />Project No: 18600251.02041 <br />Project ID: DTSC FMS24 Phase 2 <br />Client Code Client PO/Reference <br />URS -SAC <br />Volatile Organic Compounds by EPA Method 8260B - Quality Control <br />Spike Source %REC RPD <br />Analyte(s) Result PQL Units Leel Result %REC Limits RPD Limit Flag <br />Batch AJ71206 - VOAs in Water GCMS <br />Matrix Spike Dup (AJ71206-MSD1) <br />Source: 07J0309-01 <br />Prepared: 10/10/07 Analyzed: 10/11/07 <br />2-ChIorotoluene <br />10.4 <br />0.50 <br />10.0 <br />ND <br />104 <br />70-137 <br />0.957 <br />25 <br />4-ChIorotoluene <br />10.8 <br />0.50 <br />10.0 <br />ND <br />108 <br />50-134 <br />0.930 <br />25 <br />Dibromochloromethane <br />11.3 <br />0.50 <br />I0.0 <br />ND <br />113 <br />62-141 <br />3.60 <br />25 <br />1,2-Dibromo-3-chloropropane <br />12.0 <br />0.50 <br />10.0 <br />ND <br />120 <br />59-134 <br />6.01 <br />25' <br />1,2-Dibromoethane (EDB) <br />11.0 <br />0.50 <br />10.0 <br />ND <br />110 <br />40-147 <br />4.65 <br />25 <br />Dibromomethane <br />11.5 <br />0.50 <br />10.0 <br />ND <br />115 <br />65-129 <br />1.75 <br />25 <br />1,2 -Dichlorobenzene <br />11.0 <br />0.50 <br />10.0 <br />ND <br />110 <br />57-137 <br />4.65 <br />25 <br />1,3 -Dichlorobenzene <br />10.7 <br />0.50 <br />10.0 <br />ND <br />107 <br />65-131 <br />0.939 <br />25 <br />1,4 -Dichlorobenzene <br />10.5 <br />0.50 <br />10.0 <br />ND <br />105 <br />61-131 <br />1.92 <br />25 <br />Dichlorodifluoromethane <br />16.6 <br />0.50 <br />10.0 <br />ND <br />166 <br />63-177 <br />4.31 <br />25 <br />1,I-Dichloroethane <br />11.6 <br />0.50 <br />10.0 <br />ND <br />116 <br />64-136 <br />5.31 <br />25 <br />1,2-Dichloroethane <br />10.7 <br />0.50 <br />10.0 <br />ND <br />107 <br />62-126 <br />1.89 <br />25 <br />1,1-Dichloroethene <br />13.0 <br />0.50 <br />10.0 <br />ND <br />130 <br />45-178 <br />0.772 <br />25 <br />cis-1,2-Dichloroethene <br />12.0 <br />0.50 <br />10.0 <br />ND <br />120 <br />66-141 <br />1.68 <br />25 <br />trans-1,2-Dichloroethene <br />I1.3 <br />0.50 <br />10.0 <br />ND <br />113 <br />59-151 <br />0.889 <br />25 <br />1,2-Dichloropropane <br />11.4 <br />0.50 <br />10.0 <br />ND <br />114 <br />62-128 <br />4.48 <br />25 <br />1,3-Dichloropropane <br />10.8 <br />0.50 <br />10.0 <br />ND <br />108 <br />67-126 <br />3.77 <br />25 <br />2,2-Dichloropropane <br />8.89 <br />0.50 <br />10.0 <br />ND <br />88.9 <br />71-135 <br />4.84 <br />25 <br />1,1-Dichloropropene <br />11.6 <br />0.50 <br />10.0 <br />ND <br />116 <br />71-135 <br />0.866 <br />25 <br />cis-1,3-Dichloropropene <br />11.2 <br />0.50 <br />10.0 <br />ND <br />112 <br />50-140 <br />3.64 <br />25 <br />trans-1,3-Dichloropropene <br />10.4 <br />0.50 <br />10.0 <br />ND <br />104 <br />55-126 <br />5.43 <br />25 <br />Ethylbenzene <br />11.4 <br />.0.50 <br />10.0 <br />ND <br />114 <br />48-153 <br />3.57 <br />25 <br />Hexachlorobutadiene <br />9.69 <br />0.50 <br />10.0 <br />ND <br />96.9 <br />70-I47 <br />1.66 <br />25 <br />Isopropylbenzene <br />10.4 <br />0.50 <br />10.0 <br />ND <br />104 <br />65-128 <br />2.93 <br />25 <br />p-Isopropyltoluene <br />10.7 <br />0.50 <br />10.0 <br />ND <br />107 <br />70-132 <br />0.00 <br />25 <br />The results in this report apply to the samples analyzed in accordance 'with the chain <br />of cuatody document. This analytical report must he 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 9 Phone: (925) 828-6226 • Fax: (925) 828-6309 <br />