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Alpha Analytical Laboratories Inc. e-mail: clientservices@alpha-labs.com <br />CHEMICAL EXAMINATION REPORT Page 45 of 50 <br />URS Corp - Sac <br />2870 Gateway Oaks Dr., Suite 300 Report Date: 10/22/07 07:09 <br />Sacramento, CA 95833 Project No: 18600251.02041 <br />Attn: Chani Leimbach Project ID: DTSC FMS24 Phase 2 <br />Order Number Receipt Date/Time Client Code <br />07JO352 10/06/2007 13:00 URS -SAC <br />Client PO/Reference <br />Volatile Organic Compounds by EPA Method 8260B - Quality Control <br />Spike Source %REC RPD <br />Analyte(s) Result PQL Units Level Result °/uREC Limits RPD Limit Flag <br />Batch AJ71704 - VOAs in Soil GCMS <br />Matrix Spike (6J71704 -MSI) <br />Source: 07J0507-Ot <br />Prepared & Analyzed: 10/16/07 <br />13-Dichloroethene <br />0.0187 <br />0.0050 <br />0.0231 <br />ND <br />81.0 <br />50-155 <br />cis-1,2-Dichloroethene <br />0.0175 <br />0.0050 n <br />0.0231 <br />ND <br />75.8 <br />57-137 <br />0.0167 <br />0.0050 <br />0.0231 <br />ND <br />72.3 <br />52-140 <br />41.2Dichloroethene <br />oropropme <br />0.0180 <br />0.0050 n <br />0.0231 <br />ND <br />77.9 <br />52-134 <br />1,3-Dichloropropme <br />0.0153 <br />0.0050 <br />0.0231 <br />ND <br />662 <br />56-131 <br />2,2-Dichloropropene <br />0.0229 <br />0.0050 <br />0.0231 <br />ND <br />99.1 <br />37-143 <br />1,1-Dichloropropene <br />0.0169 <br />0.0050 <br />0.0231 <br />ND <br />732 <br />36-150 <br />cis-1,3-Dichloropropene <br />0.0185 <br />0.0050 <br />0.0231 <br />ND <br />80.1 <br />0-173 <br />trans-1,3-Dichloropropene <br />0.0127 <br />0.0050 <br />0.0231 <br />ND <br />55.0 <br />12-152 <br />Ethylbenzene <br />0.0382 <br />0.0050 <br />0.0231 <br />0.035 <br />13.9 <br />23-150 <br />Hexachlorobutadiene <br />0.0131 <br />0.0050 <br />0.0231 <br />ND <br />56.7 <br />0-200 <br />lsopropylbeozene <br />0.0136 <br />0.0050 <br />0.0231 <br />ND <br />58.9 <br />7-154 <br />p4sopropyholuene <br />0.0126 <br />0.0050 <br />0.0231 <br />ND <br />54.5 <br />9-164 <br />Methyl ethyl ketone <br />0.0645 <br />0.015 <br />0.0461 <br />ND <br />140 <br />25-147 <br />Methyl isobutyl ketone <br />0.0407 <br />0.010 <br />0.0461 <br />ND <br />88.3 <br />13-164 <br />Methyl tert-butyl ether <br />0.0248 <br />0.0050 <br />0.0231 <br />ND <br />107 <br />60-138 <br />Methylene chloride <br />0.0216 <br />0.0050 <br />0.0231 <br />ND <br />93.5 <br />41-146 <br />Naphthalene <br />0.0119 <br />0.0050 <br />0.0231 <br />ND <br />51.5 <br />0-190 <br />n-Propylbenzene <br />0.0136 <br />0.0050 <br />0.0231 <br />ND <br />58.9 <br />0-171 <br />Styrene <br />0.0151 <br />0.0050 <br />0.0231 <br />ND <br />65.4 <br />0-172 <br />1,1,1,2 -Tetrachloroethane <br />0.0171 <br />0.0050 <br />0.0231 <br />ND <br />74.0 <br />25459 <br />1,1,2,2 -Tetrachloroethane <br />0.00905 <br />0.0050 <br />0.0231 <br />ND <br />39.2 <br />38-127 <br />Tetrachloroethene <br />0.0191 <br />0.0050 <br />0.0231 <br />ND <br />82.7 <br />35-145 <br />Toluene <br />0.0156 <br />0.0050 <br />0.0231 <br />ND <br />67.5 <br />33-148 <br />1,2,3-Trichlombenzene <br />0.00938 <br />0.0050 <br />0.0231 <br />ND <br />40.6 <br />0-166 <br />QM -05 <br />The results in this report apply to the samples analyzed in accordance with the chain <br />of document. This analytical report must be reproduced in its entirety. -6 .4- <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 />