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t1 a.y <br /> ! STL Submission# 2003-11-0804 <br /> ! E <br /> Gas/BTEX Fuel Oxygenates by 82608 <br /> TRC Alton Geosclence <br /> Attn Anlu Fan`an <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone (949) 341-7440 Fax (949) 753-0111 <br /> Project 41050001 FA20 Received 11/21/2003 13 01 <br /> Conoco Phillips # 5886 <br /> Site 2701 West March Lane, Stockton <br /> Batch QC Report <br /> Prep(s) 50306 Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch#2003112101-1 B 66 <br /> LCS 2003112101-1 B 66-049 Extracted 12/01/2003 Analyzed 12/01/2003 09 49 <br /> LCSD 2003112101-1 B 66-013 Extracted 12/01/2003 Analyzed 12/01/2003 10 13 <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Urnits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Methyl tent-butyl ether(MTBE) 221 22 1 25 884 88 4 0 0 65-165 20 <br /> Benzene 243 234 25 972 936 3 8 69-129 20 <br /> Toluene 243 22 6 25 972 904 72 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 488 484 500 976 96 8 76-114 <br /> Toluene-d8 467 466 500 934 932 88-110 <br /> Severn Trent Laboratories, Inc 12/16/2003 09 58 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton CA 94566 <br /> A part of Severn Trent Plc Tel 925 484 1919 Fax 925 484 1096'www stl-inc com"CA DHS FLAP*2496 Page 14 of 16 <br />