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'ar <br />Alpha PAnalytical LdbOratOries Inc. e-mail: clientservices@alpha-labs.com <br />URS Corp -Sac CHEMICAL EXAMINATION REPORT Page 51 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 />Atte: Chani Leimbach Project ID: DTSC FMS24 Phase 2 <br />Order Number Receipt Date/Time Client Code Client PO/Reference <br />0770347 10/06/2007 13:00 URS -SAC <br />Volatile Organic Compounds by EPA Method 8260B - Quality Control <br />Spike Source °/uREC RPD <br />Analyte(s) Result PQL Units Level Result °/uREC Limits RPD Limit Flag <br />Batch AJ71626 - VOAs in Water GCMS <br />Matrix Spike (AJ71626-MSi) <br />-Source: 07JO416-01 <br />Prepared & Analyzed: <br />10/15/07 <br />1,1 Dichloroethene <br />10.7-0 <br />50 <br />10.0 <br />ND <br />107 <br />45-178 <br />cis-1,2-Dichloroethene <br />102 <br />0.50 <br />10.0 <br />ND <br />102 <br />66-141 <br />trans-1,2-Dichlomethene <br />9.83 <br />0.50 <br />10.0 <br />ND <br />98.3 <br />59-151 <br />1,2-Dichloropropme <br />9.83 <br />0.50 <br />10.0 <br />ND <br />98.3 <br />62-128 • <br />1,3-Dichloropropane <br />10.7 <br />0.50 <br />10.0 <br />ND <br />107 <br />67-126 <br />2,2-Dichlompropme <br />10.1 <br />0.50 <br />10.0 <br />ND <br />101 <br />71-135 <br />1,1-Dichloropropene <br />9.76 <br />0.50 <br />10.0 <br />ND <br />97.6 <br />71-135 <br />cis-1,3-Dichlompropme <br />10.5 <br />0.50 <br />10.0 <br />ND <br />105 <br />50-140 <br />trans-13-Dichlompropene <br />9.21 <br />0.50 <br />10.0 <br />ND <br />92.1 <br />55-126 <br />Ethylbenzene <br />11.3 <br />0.50 <br />10.0 <br />ND <br />113 <br />48-153 <br />Hexachlorobutadiene <br />10.5 <br />0.50 <br />10.0 <br />ND <br />105 <br />70-147 <br />Isopropylbenzeue <br />10.5 <br />0.50 <br />10.0 <br />ND <br />105 <br />65-128 <br />p-Isopropyltoluene <br />11.1 <br />0.50 <br />10.0 <br />ND <br />ill <br />70-132 <br />Methyl ethyl ketone <br />17.7 <br />1.0 <br />20.0 <br />ND <br />88.5 <br />62-126 <br />Methyl isobutyl ketone <br />19.8 <br />1.0 <br />20.0 <br />ND <br />99.0 <br />66-127 <br />Methyl tert-butyl ether <br />9.34 <br />0.50 <br />10.0 <br />ND <br />93.4 <br />55-144 <br />Methylene chloride <br />9.04 <br />0.50 <br />10.0 <br />ND <br />90.4 <br />60-137 <br />Naphthalene <br />11.3 <br />0.50 <br />10.0 <br />ND <br />113 <br />64-143 <br />n-Propylbenzene <br />10.3 <br />0.50 <br />10.0 <br />ND <br />103 <br />66-138 <br />Styrene <br />11.8 <br />0.50 <br />10.0 <br />ND <br />118 <br />36-162 <br />1,1,1,2 -Tetrachloroethane <br />11.2 <br />0.50 <br />10.0 <br />ND <br />112 <br />56-137 <br />1,1,2,2 -Tetrachloroethane <br />10.6 <br />.0.50 <br />10.0 <br />ND <br />106 <br />63-121 <br />Tetrachloroethene <br />9.42 <br />0.50 <br />10.0 <br />ND <br />94.2 <br />49-148 <br />Toluene <br />11.5 <br />0.30 <br />10.0 <br />ND <br />115 <br />56-147 <br />1,2,3-Trichlorobenzene <br />10.9 <br />0.50 <br />10.0 <br />ND <br />109 <br />60-143 <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 />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 />