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Alpha VAnalyticaI Laboratories Inc. e-mail: clientservices@alpha-labs.com <br />CHEMICAL EXAMINATION REPORT Page 41 of 68 <br />URS Corp - Sac <br />2870 Gateway Oaks Dr., Suite 300 <br />Sacramento, CA 95833 <br />Attn: Chani Leimbach <br />Order Number Receipt Date/Time Client Code <br />07J0347 10/06/2007 13:00 URS -SAC <br />Report Date: 10/22/07 07:24 <br />Project No: 18600251.02041 <br />Project ID: DTSC FMS24 Phase 2 <br />CIient PO/Reference <br />Volatile Organic Compounds by EPA Method 826013- Quality Control <br />Spike Source %REC RPD <br />Analyte(s) Result PQL Units Level Result %REC Limits RPi7 Limit Flag <br />Batch AJ71206 - VOAs in Water GCMS <br />Matrix Spike (AJ71206-MSI) <br />Source: 07J0309-01 <br />-11.4 <br />Prepared: 10/10/07 Analyzed: 10/11/07 <br />1,3,5-Trimethylbenzene <br />0.50 <br />10.0 <br />ND <br />114 <br />70-I36 y <br />Vinyl chloride <br />12.9 0.50 <br />10.0 <br />ND <br />129 <br />55-146 <br />m,p-Xylene <br />22.0 0.50 <br />20.0 <br />ND <br />110 <br />7I-137 <br />o -Xylene <br />11.2 0.50 <br />10.0 <br />ND <br />112 <br />70-137 <br />Xylenes (total) <br />33.2 0.50 <br />30.0 <br />ND <br />111 <br />49-153 <br />Surrogate: Dibromofluoromethane <br />20.8 <br />25.0 <br />83.2- <br />61-105 <br />Surrogate: Toluene -d8 <br />23.2 <br />25.0 <br />92.8 <br />69-115 <br />Surrogate: Bromofluorobenzene <br />30.2 <br />25.0 <br />121 <br />75-126 <br />Matrix Spike_Dup (AJ71206-MSDI) <br />Source: 07JO309-01 <br />Prepared: 10/10/07 Analyzed: 10/11/07 <br />Acetone <br />44.4 <br />5.0 ug4 <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 />57-14I <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 />Bromochloromethane <br />11.1 <br />0.50 <br />10.0 <br />ND <br />Ill <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 />Bromomethane <br />I2.3 <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. This analytical report must be reproduced in its entirety. -5 � <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 Ad., Suite 3, Dublin, CA 94568 • Phone. (925) 828-6226 • Fax: (925) 828-6309 <br />