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STLSubmission 2004-07-0397 <br /> • <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geoscience- Irvine <br /> Attn Anju Farfan <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone (949) 341-7440 Fax (949) 753-0111 <br /> Project 41050001 FA20 Received 07/13/2004 16 34 <br /> Conoco Phillips#4409 <br /> Site 1502 N EI Dorado St Stockton <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch #2004/07/24-01 65 <br /> LCS 2004107124-01 65-045 Extracted 07/2412004 Analyzed 07/24/2004 13 45 <br /> LCSD 2004107124-01 65-009 Extracted 07/24/2004 Analyzed 07/24/2004 14 09 <br /> Compound Conc ug, <br /> Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> . Benzene 27 1 26 5 250 1084 1060 22 69-129 20 <br /> Toluene 25 9 263 250 1036 1052 15 70-130 20 <br /> Methyl tert-butyl ether(MTBE) 29 7 333 250 1188 1332 11 4 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 500 476 500 1000 952 72-128 <br /> Toluene-d8 511 479 500 102 2 95 8 80-173 <br /> • Severn Trent Laboratories, Inc 07/27/2004 12 34 <br /> STL San Francisco•1220 Quarry Lane Pleasanton CA 94566 <br /> A Dart of Severn Trem Pic Tel 925 484 1919 Fax 925 484 1096'www stl ine com-CA DHS ELAP#2496 Page 22 of 24 <br />