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V <br />Alpha fAnalytical Laboratories Inc. e-mail: clientservices@alpha-labs.com <br />CHEMICAL EXAMINATION REPORT Page 52 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 DateiTime Client Code <br />0770347 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 />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 %REC Limits RPD Limit Flag <br />Batch AJ71626 - VOAs in Water GCMS <br />Matrix Spike (AJ71626-MSI) <br />Source: 07JO416-01 <br />Prepared & Analyzed: 10/15/07 <br />1,2,4-Trichlombenzene <br />10.3 <br />0.50 <br />10.0 <br />ND <br />103 <br />65-134 <br />1,1,1 -Trichloroethane <br />10.0 <br />0.50 <br />10.0 <br />ND <br />100 <br />62-144 <br />1,1,2. hl <br />10.8 <br />0.50 <br />10.0 <br />ND <br />108 <br />62-129 <br />Tri ethene <br />9.23 <br />0.50 <br />10.0 <br />ND <br />92.3 <br />58-140 <br />Trich omfluoromethane <br />9.50 <br />0.50 <br />10.0 <br />ND <br />95.0 <br />65-143 <br />Trichlomt ifluoroethme <br />8.58 <br />0.50 <br />9.84 <br />ND <br />87.2 <br />72-135 <br />1,2,3-Trichlompropme <br />10.3 <br />0.50 <br />10.0 <br />ND <br />103 <br />65-120 <br />1,2,4-1rimethylbenzene <br />11.5 <br />0.50 <br />10.0 <br />ND <br />115 <br />71-138 <br />1,3,5-Trimethylbenzene <br />10.8 <br />0.50 <br />10.0 <br />ND <br />108 <br />70-136 <br />Vinyl chloride <br />10.3 <br />0.50 <br />10.0 <br />ND <br />103 <br />55-146 <br />m,p-Xylene <br />20.4 <br />0.50 <br />20.0 <br />ND <br />102 <br />71-137 <br />o -Xylene <br />11.4 <br />0.50 <br />10.0 <br />ND <br />114 <br />70-137 <br />Xylenes (total) <br />31.8 <br />0.50 <br />30.0 <br />ND <br />106 <br />49-153 <br />Surrogate: Dibromofluoromethane <br />20.5 <br />25.0 <br />82.0 <br />61-105 <br />Surrogate: Toluene -d8 <br />26.3 <br />25.0 <br />105 <br />69-115 <br />Surrogate: Bromofluorobemene <br />31.3 <br />25.0 <br />125 <br />75-126 <br />Matrix Spike Dup (AJ71626-MSD1) <br />Source: 07JO416-01 <br />Prepared & Analyzed: 10/15/07 <br />Acetone <br />26.9 <br />5.0 ug/1 <br />39.4 <br />ND <br />68.3 <br />40-147 <br />7.72 <br />25 <br />Benzene <br />10.4 <br />0.30 <br />10.0 <br />ND <br />104 <br />57-141 <br />5.84 <br />25 <br />Bromobenzene <br />11.9 <br />0.50 <br />10.0 <br />ND <br />119 <br />65-135 <br />4.29 <br />25 <br />Bromochlommethane <br />10.3 <br />.0.50 <br />10.0 <br />ND <br />103 <br />69-131 <br />3.46 <br />25 <br />Bromodichlommethane <br />10.7 <br />0.50 <br />10.0 <br />ND <br />107 <br />62-140 <br />6.76 <br />25 <br />Bmmoform <br />13.1 <br />0.50 <br />10.0 <br />ND <br />131 <br />55-151 <br />6.30 <br />25 <br />Bromomethane <br />9.94 <br />0.50 <br />10.0 <br />ND <br />99.4 <br />43-162 <br />6.12 <br />25 <br />The results in this report apply to the samples analyzed in accordance with the chain <br />of cumm&dv docinnent. This analytical report must be reproduced in its entirety. <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 />