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AlphaAnalytical Laboratories Inc. a -mail: clientservices0alpha-labs.com <br />URS Corp -Sac CHEMICAL EXAMINATION REPORT Page 41 of 68 <br />2870 Gateway Oaks Dr., Suite 300 Report Date: 10/22/07 07:24 <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 />07JO347 10/062007 13:00 URS -SAC <br />Client PO/Reference <br />Volatile Organic Compounds by EPA Method 8260B - Quality Control <br />Spike Source a/oREC RPD <br />Analyte(s) Result PQL Units Level Result "/oREC Limits RPD Limit Flag <br />Batch AJ71206 - VOAs in Water GCMS <br />Matrix Spike (AJ71206-MSl) <br />Source: 07J0309-01 <br />Prepared: 10/10/07 Analyzed- 10/11/07 <br />1,3,5-Tnmethylbenzene <br />11.4 <br />0.50 <br />10.0 <br />ND <br />114 <br />70-136 <br />Vinyl chloride <br />12.9 <br />0.50 <br />10.0 <br />ND <br />129 <br />55-146 <br />m,p-Xylene <br />22.0 <br />0.50 <br />20.0 <br />ND <br />110 <br />71-137 <br />o -Xylene <br />11.2 <br />0.50 <br />10.0 <br />ND <br />112 <br />70-137 <br />• <br />Xylenes (total) - <br />332 <br />0.50 <br />30.0 <br />ND <br />111 <br />. 49-153 <br />Surrogate: Dibromofluoromethau: <br />20.8 <br />25.0 <br />83.2- <br />61405 <br />Surrogate: Toluene -d8 <br />23.2 <br />25.0 <br />92.8 <br />69-115 <br />Surrogate: BromoJluorobenzene <br />30.2 <br />25.0 <br />121 <br />75-126 <br />Matrix Spike Dup (AJ71206-MSDI) <br />Source: 07J0309-01 <br />Prepared: 10/10/07 Analyzed: 10/11/07 <br />Acetone <br />44.4 <br />5.0 <br />ug/I <br />39.4 <br />ND <br />113 <br />40-147 <br />3.90 <br />25 <br />Benzene <br />11.5 <br />0.30 <br />10.0 <br />ND <br />115 <br />57-141 <br />4.44 <br />25 <br />Bromobenzene <br />11.4 <br />0.50 <br />10.0 <br />ND <br />114 <br />65-135 <br />1.77 <br />25 <br />Bromochlommethane <br />11.1 <br />0.50 <br />10.0 <br />ND <br />111 <br />69-131 <br />0.905 <br />25 <br />Bromodichloromethane <br />12.0 <br />0.50 <br />10.0 <br />ND <br />120 <br />62-140 <br />3.39 <br />25 <br />Bromoform <br />12.3 <br />0.50 <br />10.0 <br />ND <br />123 <br />55-151 <br />8.47 <br />25 <br />Bromomethme <br />12.3 <br />0.50 <br />10.0 <br />ND <br />123 <br />43-162 <br />0.816 <br />25 <br />n-Butylbenzene <br />11.0 <br />0.50 <br />10.0 <br />ND <br />110 <br />74-138 <br />0.913 <br />25 <br />sec-Butylbenzene <br />11.7 <br />0.50 <br />10.0 <br />ND <br />117 <br />78-145 <br />0.851 <br />25 <br />tert-Butylbenzene <br />11.4 <br />0.50 <br />10.0 <br />ND <br />114 <br />71-139 <br />1.77 <br />25 <br />Carbon tetrachloride <br />12.5 <br />0.50 <br />10.0 <br />ND <br />125 <br />65-153 <br />7.47 <br />25 <br />Chlorobenzene <br />10.4 <br />. 0.50 <br />10.0 <br />ND <br />104 <br />57-136 <br />0.966 <br />25 <br />Chloroethane <br />11.6 <br />0.50 <br />10.0 <br />ND <br />116 <br />62-142 <br />1.74 <br />25 <br />Chloroform <br />11.0 <br />0.50 <br />10.0 <br />ND <br />110 <br />36-151 <br />3.70 <br />25 <br />Chloromethane <br />14.5 <br />0.50 <br />10.0 <br />ND <br />145 <br />69-149 <br />12.5 <br />25 <br />The results in this report apply to the samples analyzed in accordance with the chain <br />of custody document. Thmust be analytical report mbe reproduced in its entirety. -1 n /-� 0 <br />Bruce Gove /(fes 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 />