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STL Submission# 2003-10-0407 <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geoscience <br /> Attn Anlu Farfan <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone (949) 341-7440 Fax (949) 753-0111 <br /> Project 41050001 FA20 Received 10/09/2003 15 25 <br /> Conoco Phillips#4409 <br /> Site 1502 N EI Dorado Street <br /> Batch QC Report <br /> Prep(s) 50306 Test(s) 8260FAS <br /> Method Blank Water QC Batch#2003110/21-02.68 <br /> MB 2003110121-02 68-060 Date Extracted 10121/2003 21 38 <br /> Compound Conc RL Unit Analyzed Flag <br /> Gasoline ND 50 ug/L 10/21/2003 21 38 <br /> Benzene ND 0 5 ug/L 10/21/2003 21 38 <br /> Toluene ND 0 5 ug/L 10/21/2003 21 38 <br /> Ethylbenzene ND 0 5 ug/L 10/21/2003 21 38 <br /> Total xylenes ND 1 0 ug/L 10/21/2003 21 38 <br /> tert-Butyl alcohol (TBA) ND 100 ug/L 10/21/2003 21 38 <br /> Methyl tett-butyl ether (MTBE) ND 2 0 ug/L 10/21/2003 21 38 <br /> Di-isopropyl Ether(DIPE) ND 2 0 ug/L 10/21/2003 21 38 <br /> Ethyl tert-butyl ether(ETBE) ND 2 0 ug/L 10/21/2003 21 38 <br /> tert-Amyl methyl ether (TAME) ND 2 0 ug/L 10/21/2003 21 38 <br /> 1,2-DCA ND 2 0 ug/L 10/21/2003 21 38 <br /> EDB ND 2 0 ug/L 10/21/2003 21 38 <br /> Ethanol ND 500 ug/L 10/21/2003 21 38 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 95 8 76-114 % 10/21/2003 21 38 <br /> Toluene-d8 1996 88-110 1 % 1 10/21/2003 21 38 <br /> Severn Trent Laboratories, Inc 01/08/2004 13 21 <br /> STL San Francisco' 1220 Quarry Lane Pleasanton CA 94566 <br /> Apart d So m Tr lPlc Tel 925 484 1919 Fax 925 484 1096"www stl-inc com a CA DHS ELAP#2496 Page 9 of 14 <br />