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0 <br />Alpha VAnalytical Laboratories Inc. e-mail: clientservices@alpha-labs.com <br />CHEMICAL EXAMINATION REPORT <br />URS Corp -Sac <br />Page 61 of 68 <br />2870 Gateway Oaks Dr., Suite 300 <br />Report Date: <br />10/22/07 07:24 <br />Sacramento, CA 95833 <br />Project No: <br />18600251.02041 <br />Attn: Chani Leimbach <br />Project ID: <br />DTSC FMS24 Phase 2 <br />Order Number Receipt Date/rime <br />Client <br />Code <br />Client PO/Reference <br />0770347 10/06/2007 13:00 <br />URS -SAC <br />Volatile Organic Compounds by EPA Method 8260B - Quality Control <br />Analyte(s) Result <br />PQL Units <br />Spike Source %REC RPD <br />Level Result •/dtEC Limits RPD Limit <br />Flag <br />Batch AJ71704 - VOAs in Soil GCMS <br />LCS (&771704-BSJ) <br />Prepared & Analyzed:10/16/07 <br />Surrogate: Bromofluorobenzene 0.0228 <br />0.0250 91.2 <br />69-134 <br />Surrogate: Dtbromofluoromethane 0.0221 <br />0.0250 88.4 <br />63-124 <br />Surrogate: Toluene -d8 0.0231 <br />" <br />0.0250 92.4 <br />66-135 <br />Matrix Spike (AJ71704MS1) Source: 07JO507-01 <br />Prepared & Analyzed: 10/16/07 <br />Acetone 0.207 <br />0.020 mg/kg <br />0.0909 0.090 129 <br />0-181 <br />Benzene 0.0173 <br />0.0050 <br />0.0231 ND 74.9 <br />29-145 <br />Bromobenzene 0.0124 <br />0.0050 <br />0.0231 ND 53.7 <br />31-144 <br />Bromodhloromethane 0.0171 <br />0.0050 <br />0.0231 ND 74.0 <br />58-129 <br />Bromodichioromethane 0.0179 <br />0.0050 <br />0.0231 ND 77.5 <br />34.160 <br />Bromoform 0.0134 <br />0.0050 <br />0.0231 ND 58.0 <br />22-166 <br />Bromomethane 0.0176 <br />0.0050 <br />0.0231 ND 76.2 <br />10-153 <br />n-Butylbenzeoe 0.0156 <br />0.0050 <br />0.0231 ND 67.5 <br />0-182 <br />sec-Butylbenzene 0.0140 <br />0.0050 <br />0.0231 ND 60.6 <br />0-187 <br />tert-Butylbenzene 0.0152 <br />0.0050 <br />0.0231 ND 65.8 <br />0-179 <br />Carbon tetrachloride 0.0176 <br />0.0050 <br />0.0231 ND 76.2 <br />10-189 <br />Chlorobenzene 0.0134 <br />0.0050 <br />0.0231 ND 58.0 <br />32-139 <br />Chloroethane 0.0193 <br />0.0050 <br />0.0231 ND 83.5 <br />46-141 <br />Chloroform 0.0194 <br />0.0050 " <br />0.0231 ND 70.6 <br />57-127 <br />Chloromethane 0.0217 <br />0.0050 <br />0.0231 ND 93.9 <br />30-175 <br />2-Chlorotoluene 0.0132 <br />0.0050 n <br />0.0231 ND 57.1 <br />16-158 <br />4-Chlorotoluene 0.0119 <br />0.0050 <br />0.0231 ND 51.5 <br />13-155 <br />Dibromochloromethane 0.0159 <br />0.0050 <br />0.0231 ND 68.8 <br />34-160 <br />1,2-Dibromo-3-chloropropane 0.0168 <br />0.0050 <br />0.0231 AID 72.7 <br />24-153 <br />1,2-Dibromoethme (EDB) 0.0141 <br />0.0050 <br />0.0231 ND 61.0 <br />52-129 <br />The results in this report apply to the samples analyzed in accordance with the chain <br />of custody document This analytical report must be reproduced in its entirety. <br />0 <br />Bruce Gove <br />LaboratoryDirector <br />10/22/2007 <br />Corporate: 208 Mason St., Ukiah, <br />CA 95482 • <br />Phone: 707) 468-04016 • <br />Fax: (707) 468-5267 <br />Service Center: 6398 Dougherty Rd., Suite <br />3, Dublin, CA <br />94568 • Phone: (925) 828-6226 • Fax: (925) 828-6309 <br />