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_ _ <br />• <br />Alpha DAnalytical Laboratories Inc. <br />e-mail: clientservices@alpha-labs.com <br />CHEMICAL EXAMINATION REPORT <br />URS Corp -Sac <br />Page 38 of 50 <br />2870 Gateway Oaks Dr., Suite 300 <br />Sacramento, CA 95833 <br />Report Date: 10/22/07 07:09 <br />Atte: Chani Leimbach <br />Project No: 18600251.02041 <br />Project ID: DTSC FMS24 Phase 2 <br />Order Number Receipt Date/Time Client <br />Code <br />0770352 10/06/2007 13:00 Client PO/Reference <br />URS <br />-SAC <br />Volatile Organic Compounds by EPA Method 8260B - Quality Control <br />Analyte(s)Spike <br />Result PQL Units <br />Source •/6REC RPD <br />Level Result %REC Limits <br />Batch AJ71206 - VOAs in Water GCMS <br />RPD Limit <br />Flag <br />Matrix Spike Du AJ71206-MSDI Source: 07JO309-01 <br />Prepared: 10/10/07 Analyzed: 10/11/07 <br />Surrogate: Dibromojluoromethaee 271 " <br />Surrogate: Toluene -d8 23.3 " <br />23.0 84.4 67403 <br />Surrogate: Bromojluorobenzene 30.0 <br />23.0 93.2 69-115 <br />Batch AJ71704 <br />23.0 /20 73-/26 <br />- VOAs in Soil GCMS <br />Blank AJ71704-BLKl <br />Acetone <br />Prepared &Analyzed: 10/16/07 <br />ND 0.020 mg/kg <br />Benzene ND 0.0050 " <br />Bromobenzene ND 0.0050 <br />Bromochloromethane ND 0.0050 " <br />Bromodichloromethane ND 0.0050 " <br />Bromoform ND 0.0050 " <br />Bromomethane ND 0.0050 " <br />n-Butylbenzene ND 0.0050 " <br />sec-Butylbenzene ND 0.0050 " <br />ten-Butylbenzene ND 0.0050 " <br />Carbon tetrachloride ND 0.0050 " <br />Chlorobenzene ND 0.0050 " <br />Chloroethane ND 0.0050 " <br />Chloroform ND 0.0050 " <br />Chloromethane ND 0.0050 " <br />2-Chlorotoluene ND 0:0050 " <br />4-Chlorotoluene ND 0.0050 " <br />Dibromochloromethane ND 0.0050 " <br />The results in this report apply to the samples aiabaed in accordance with the chain <br />of caatody document. This analytical report be <br />must reproduced in its entirety. <br />Bruce Gove <br />Corporate: 208 Mason St., Ukiah, CA 95482 • Phone Laboratoryirector <br />&0401 <br />10/27-/2007 <br />Service Center: 6398 Dougherty Rd., Suite 3, Dublin, CA <br />•Fax: (707) 468-5267 <br />94568 • Phone: (925) 828-6226 <br />• Fax: (925) 828-6309 <br />