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Submission#: 2004-05-0646 <br /> Gas/BTEX Fuel Oxygenates by 82608 <br /> URS-Sacramento, CA STL San Francisco <br /> Attn.: Vernon Elarth 1220 Quarry Lane <br /> 2870 Gateway Oaks Dr., Ste 300 Pleasanton,CA 94566 <br /> Sacramento, CA 95833 Tet:(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: 38466402.00000 Received: 05/19/2004 09:45 www.chromalab.com <br /> BP Facility No: 548 4&PHS Site: 1612 W. Hammer Lane, Stoca<& HS ELAP#2496 <br /> PreP(S): 50306 . Test(s) 8260B-T-'1-`- <br /> Sample <br /> 2608 FSample 1D: 00548AIcFF-054804 Lab ID: 200.445-0646 2 <br /> Sampled: 05/18/2004 09:30 Extracted: '. 511 912004 1 6:04 <br /> Matrix: Air QC Batch#: 2004/05119-1D65; '-.._ <br /> Compound Conc. MDL RL Unit Conc. MDL 1 RL I Unit Dilution Analyzed Flag <br /> Gasoline ND 34 50 mg/m3 NO 9.35 14 ppmv 1.00 05/191200416:04 <br /> Benzene NO 0.16 0.50 mg/m3 NO 0.0495 0.15 ppmv 1.00 051191200416:04 <br /> Toluene NO 0.14 0.50 mg/m3 ND 0.0368 0.13 ppmv 1.00 051191200416:04 <br /> Ethylbenzene NO 0.15 0.50 mg/m3 NO 0.0342 0.11 ppmv 1.00 051191200416:04 <br /> Total xylenes ND 0.30 1.0 mg/m3 ND 0.0670 0.23 ppmv 1.00 05/19/2004 16:04 <br /> Methyl tert-butyl ether(MTBE) NO 0,13 0.50 mg/m3 ND 0.0352 0.14 ppmv 1.00 05/19/2004 16:04 <br /> Surrogates(s) <br /> 1,2-Dichloraelhane-d4108.2 72-128 /o /0 1.00 05/19/2004 16:04 <br /> Toluene-d8 96.5 80-113 % % 1.00 05119/200416:04 <br /> 05/23/2004 19:50 STL San Francisco is Dart of Severn Trent Laboratories.Inc. Page 3 of 5 <br />