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i <br /> � Submission# 2004-01-0011 <br /> STLI <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geosaence <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 12/31/2003 16 05 <br /> Conoco Phillips#6981 <br /> Site 4707 Pacific Ave Stockton <br /> Batch QC Report <br /> Prep(s) 50306 Test(s) 8260FA13 <br /> Laboratory Control Spike Water QC Batch#200401109-18.62 <br /> LCS 2004101109-18 62-002 Extracted, 01109/2004 Analyzed- 0110912004 10 02 <br /> LCSD 2004101109-1B 62-018 Extracted, 01/09/2004 Analyzed 01/09/2004 0918 <br /> Compound Conc ug/L Exp Conc. Recovery% RPR Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 165 177 25 660 708 70 65-165 20 <br /> Benzene 24 5 225 25 980 900 8 5 69-129 20 <br /> Toluene 260 247 25 1040 988 51 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 451 418 500 902 836 76-114 <br /> Toluene-d8 482 491 500 964 982 88-110 <br /> Severn Trent Laboratories, Inc 01/12/2004 1820 <br /> STL San Francisco`1220 Quarry Lane,Pleasanton,CA 94566 <br /> Apal of Severn Trard Flc Tel 925 484 1919 Fax 925 484 1096"www stl-inc com`CA DHS ELAP#2496 Page 25 of 29 <br />