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STLSubmission# 2004-09-0091 <br /> GaSIBTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geosclence <br /> Attn An1u Farfan <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone (949) 341-7440 Fax (949) 753-0111 <br /> Project 41050001 FA20 Received 12/31/2003 16 05 <br /> Conoco Phillips#6981 <br /> Site 4707 Pacific Ave Stockton <br /> Batch QC Report <br /> Prep(s) 5030E Test(s)-8260FAB <br /> Laboratory Control Spike Water QC Batch#2004101108-01.69 <br /> LCS 2004/01/08-01 69-004 Extracted 01/0812004 Analyzed 01108/2004 10 04 <br /> LCSD 2004/01/08-01.69-023 Extracted 01/0812004 Analyzed 0 1108/2004 10 23 <br /> Compound Conc ug/L Exp Conc. Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> • Benzene 242 243 25 0 968 97 2 04 69-129 20 <br /> Toluene 262 284 250 1048 1136 81 70-130 20 <br /> Methyl tert-butyl ether(MTBE) 191 186 250 764 744 27 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 385 388 500 77 0 77 6 76-114 <br /> Toluene-d8 457 491 500 914 982 88-110 <br /> Severn Trent Laboratories, Inc 01v12r2004 18 20 <br /> STL San Francisca'1220 Quarry Lane, Pleasanton,CA 94566 <br /> Apart dSay n Tr dPic Tel 925 484 1919 Fax 925 484 1096"www stl-inc corn'CA DHS FLAP#2496 Page 23 of 29 <br />