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STL <br /> Submission# 2004-08-0791 <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> URS Corporation <br /> Attn Vern Elarth <br /> 2870 Gateway Oaks Drive, Suite 300 <br /> Sacramento, CA 95833 <br /> Phone (916)679-2000 Fax (916)679-2900 <br /> Protect Consultant Protect No 38466452 00000 Deceived 08/31/2004 09 20 <br /> BP Facility No 2186 <br /> Site 3212 North California Street <br /> Prep(s) 5030B Test(s) 8260E <br /> Sample ID 02186AEFF-083004 Lab ID 2004-08-0791 -3 <br /> Sampled 08/30/2004 09 45 Extracted 8/31/2004 13 55 <br /> Matrix Air QC Batch## 2004108131-1E 68 <br /> Compound Conc RL Unit Conc RL Unit Dilution Analyzed Flag <br /> Gasoline ND 50 mg/m3 ND 14 ppmv 1 08/311200413 55 <br /> Benzene ND 0 50 mg1m3 ND 015 ppmv 1 08/31/2004 13 55 <br /> Toluene ND 050 mg/m3 ND 013 ppmv 1 08/31/2004 13 55 <br /> Ethylbenzene ND 0 50 mg/m3 ND Oil ppmv 1 08/31/2004 13 55 <br /> • Total xylenes ND 10 mg1m3 ND 023 ppmv 1 08/31/2004 13 55 <br /> Methyl tent-butyl ether ND 050 mg/m3 ND 014 ppmv 1 08/31/2004 13 55 <br /> Surrogate(s) <br /> 1,2-Dichloroethane-d4 1089 72-128 % % 1 08/31/2004 13 55 <br /> Toluene-d8 94 5 80-113 % % 1 08/31/2004 13 55 <br /> Severn Trent Laboratories, Inc 09/1512004 15 16 <br /> STL San Francisco* 1220 Quarry Lane Pleasanton CA 94566 Page 4 of 7 <br /> A peel of Se"m r-1 Pk Tel 925 484 1919 Fax 925 484 1096*www stl-inc com*CA DHS FLAP#2496 <br />