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T_V, i <br />Alpha PAnalytical Laboratories Inc. <br />e-mail: clientservices®alpha-labs.com <br />CHEMICAL EXAMINATION REPORT <br />URS Corp - Sac CHEMICAL <br />32 of 50 <br />2870 Gateway Oaks Dr., Suite 300 <br />Sacramento, CA 95833 Report Date: 10/22/07 07:09 <br />Attn: Chani Leimbach Project No: 18600251.02041 <br />Project ID: DTSC FMS24 Phase 2 <br />Order Number Receipt Date/Time Client Code <br />07JO352 <br />10/062007 13:00 URS -SAC Client PO/Reference <br />Volatile Organic Compounds by EPA Method 8260B - Quality Control <br />Analyte(s)' Spike Source a/aREC RPD <br />Result PQL Units Level Result °/dtEC Limits RPD Limit Flag <br />Batch AJ71206 - VOAs in Water GCMS <br />........�.ocuicac <br />Trichlorofluoromethane <br />10.1 <br />0.50 <br />10.0 <br />101 <br />74-114 <br />Trichlorotrifluoroeflrane <br />10.6 <br />0.50 " <br />10.0 <br />74-130 <br />1,2,3-Trichloropropne <br />9.77 <br />0.50 " <br />9.84 <br />9.3 <br />99.3 <br />87-121 <br />1,2,4•Trimethylbenzene <br />10.7 <br />0.50 <br />10.0 <br />107 <br />78-112 <br />1,3,5-Trimethylbenzene <br />11.4 <br />11.0 <br />0.50 " <br />10.0 <br />114 <br />83-127 <br />Vinyl chloride <br />� <br />0.50 " <br />10.0 <br />110 <br />82-124 <br />m,p-Xylene <br />12.3 <br />0.50 " <br />10.0 <br />123 <br />61-140 <br />o -Xylene <br />212 <br />0.50 <br />20.0 <br />106 <br />81-124 <br />Xylenes (total) <br />10.8 <br />0.50 " <br />10.0 <br />108 <br />80-126 <br />32.0 <br />0.50 " <br />30.0 <br />107 <br />81-126 <br />Surrogate: Dibromofluoromethane <br />272 <br />, <br />Surrogate: Toluene -d884.8 <br />25.0 <br />84.8 <br />61-105 <br />Surrogate: Bromofluorobenzene <br />6 <br />" <br />25'0 <br />94.4 <br />69-115 <br />30.6 <br />- <br />25.0 <br />122 <br />75-716 <br />Matrix Spike (AJ71206-MSI) <br />Acetone <br />Source: 07JO309-01 <br />Prepared: <br />10/10/07 <br />Analyzed <br />10/11/07 <br />Benzene <br />427 <br />5.0 ug/I <br />39.4 <br />ND <br />108 <br />40-147 <br />Bromobenzene <br />11.0 <br />030 <br />10.0 <br />ND <br />110 <br />57-141 <br />Bromochloromethane <br />11.2 <br />0.50 " <br />10.0 <br />ND <br />112 <br />65-135 <br />Bromodichloromethane <br />11.0 <br />0.50 <br />10.0 <br />ND <br />110 <br />69-131 <br />Bromoform <br />11.6 <br />0.50 " <br />10.0 <br />ND <br />116 <br />62-140 <br />Bromomethane <br />113 <br />0.50 " <br />10.0 <br />ND <br />113 <br />55-151 <br />n-Butylbenzene <br />122 <br />. 0.50 <br />10.0 <br />ND <br />122 <br />43-162 <br />sec-Butylbenzene <br />10.9 <br />0.50 ^ <br />10.0 <br />ND <br />109 <br />74-138 <br />[ert-Butylbenzene <br />11.8 <br />11.2 <br />0.50 ^ <br />10.0 <br />ND <br />118 <br />78-145 <br />0.50 <br />10.0 <br />ND <br />112 <br />71-139 <br />LI <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 />13 <br />Bruce Gove <br />LaboCorporate: 208 Mason St., Ukiah, CA 95482 • Phone: (707) 46 0401 • Director 10/22/2007 <br />Service Center: 6398 Dougherty Rd., Suite 3, Dublin, CA 94568 • Phone: (925) 828-6226 ? Fax: (925)7828-6309 <br />