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Alpha I Analytical Laboratories Inc. e-mail: clientservices@alpha-labs.com <br />CHEMICAL EXAlVIINATION REPORT Page 49 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 />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 FM824 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 Linnit Flag <br />Batch AJ71626 - VOAs in Wafer GCMS <br />LCS (AJ71626-BSI) <br />20.2 <br />11"0. <br />Prepared & Analyzed: 10/15/07 <br />Alpha I Analytical Laboratories Inc. e-mail: clientservices@alpha-labs.com <br />CHEMICAL EXAlVIINATION REPORT Page 49 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 />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 FM824 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 Linnit Flag <br />Batch AJ71626 - VOAs in Wafer GCMS <br />LCS (AJ71626-BSI) <br />20.2 <br />25.0 <br />Prepared & Analyzed: 10/15/07 <br />1,1,1,2 -Tetrachloroethane <br />10.5 <br />0.50 <br />10.0 <br />105 <br />_ <br />79-118 y <br />1,1,2,2 -Tetrachloroethane <br />10.2 <br />0.50 <br />10.0 <br />102 <br />81-112 <br />Tetrachloroethene <br />13.2 <br />0.50 <br />10.0 <br />132 <br />80-127 QM -03 <br />Toluene. <br />11.1 <br />0.30 <br />'10.0 <br />11I <br />76-137 <br />1,2,3-Trichlorobenzene <br />10.8 <br />0.50 <br />10.0 <br />108 <br />84-128 <br />1,2,4-Trichlorobenzene <br />10.7 <br />0.50 <br />10.0 <br />107 <br />85-123 <br />1,1,1 -Trichloroethane <br />8.81 <br />0.50 <br />10.0 <br />88.1 <br />86-117 <br />1,1,2 -Trichloroethane <br />10.4 <br />0.50 <br />10.0 <br />104 <br />83-115 <br />Trichloroethene <br />9.27 <br />0.50 <br />10.0 <br />92.7 <br />84-114 <br />TrichIorofluoromethane <br />9.12 <br />0.50 <br />10.0 <br />91.2 <br />74-130 <br />Trichlorotrifluoroethane <br />8.76 <br />0.50 <br />9.84 <br />89.0 <br />87-121 <br />1,2,3-Trichloropropane <br />10.2 <br />0.50 <br />10.0 <br />102 <br />78-112 <br />1,2,4-Trimethylbenzene <br />11.4 <br />0.50 <br />10.0 <br />114 <br />83-127 <br />I,3,5-Trimethylbenzene <br />10.8 <br />0.50 <br />10.0 <br />108 <br />82-124 <br />Vinyl chloride <br />9.48 <br />0.50 <br />10.0 <br />94.8 <br />61-140 <br />m,p-Xylene <br />19.9 <br />0.50 <br />20.0 <br />99.5 <br />81-124 <br />o -Xylene <br />11.1 <br />0.50 <br />10.0 <br />111 <br />80-126 <br />Xylenes (total) <br />31.0 <br />0.50 <br />30.0 <br />103 <br />8I-126 <br />Surrogate: Dibromofluorometham <br />20.2 <br />25.0 <br />80.8 <br />61-105 <br />Surrogate: Toluene -d8 <br />26.2 <br />25.0 <br />105 <br />69-115 <br />Surrogate: Bromofluorobenzene <br />30.9 <br />" 25.0 <br />124 <br />75-126 <br />Matrix Spike (AJ71626-MSI} . Source: 07JO416-01 Prepared & Analyzed: 10/15/07 <br />Acetone 24.9 5.0 ug/l 39.4 ND 63.2 40-147 <br />Benzene 9.81 0.30 " 10.0 ND 98.1 57-141 <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. f <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 />