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Submission#: 2004-04-0264 <br /> Gas/BTEX Fuel Oxygenates by 8260B ; <br /> URS Corporation STL San Francisco <br /> Attn.: Vernon Elarth 1220 Quarry Lane <br /> 2870 Gateway Oaks Drive, Suite 300 Pleasanton,CA 94566 <br /> Sacramento, CA 95833 Tel:(925)484-1919 <br /> Phone: (916)679-2000 Fax: (916)679-2900 Fax:(925)484-1096 <br /> www.stl-inc.com <br /> Project: Consultant Project No: 38466402.000000 Received: 04/09/2004 09:35 www.chromalab.com <br /> BP Facility No: 548 <br /> Site: 1612 W. Hammer Lane, StocWHS ELAP#2496 <br /> Pre0(s):. 5030B, Jest(s): 82606 <br /> "Sample:ID 00548AtNF-040804 Lab'ID: -2004 <br /> r:040264- 1 <br /> -Sampled 04/081200413.20 r Extracted.— 411.0/2004 12:01. ; - <br /> Matrix: Air QC;Batch#: 2004104110.013:69 <br /> Compound Conc. MDL Rt- Unit Conc, MDL RL Unit DiiuWn I Analyzed Flag <br /> Gasoline ND 34 50 mglm3 ND 9.35 14 ppmv 1.00 041101200412:01 <br /> Benzene ND 0.16 0.50 mg/m3 ND 0.0495 0.15 ppmv 1.00 041101200412:01 <br /> TolueneND 0.14 0.50 mg1m3 ND 0.0368 0.13 ppmv 1.00 041101200412:01 <br /> Ethylbenzene ND 0.15 0.50 mg1m3 ND 0.0342 0.11 ppmv 1.00 041101200412:01 <br /> Total xylenes ND 0.30 1.0 mg/m3 ND 0.0670 0.23 ppmv 1.00 04110/2004 12:01 <br /> Methyl tert-butyl ether(MTBE) ND 0.13 0.50 mg/m3 ND 0.0352 0.14 ppmv 1.00 04/10/2004 12:01 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 106.1 76-114 % % 1.00 041101200412:01 <br /> Toluene-dB 98.6 88-110 % % 1.00 041101200412:01 <br /> 04/14/2004 16:56 STL San Francisco is part of Severn Trent Laboratories.Inc. Page 2 of 5 <br />