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1� STL <br /> Submission # 2004-05-0856 <br /> 1 <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geosclence <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 05/24/2004 11 50 <br /> Conoco Phillips# 11192 <br /> Site 1403 Country Club Blvd, Stockton <br /> Batch QC Report <br /> Prep(s) 50306 Test(s) 8260FAS <br /> Matrix Spike ( MS 1 MSD ) Water QC Batch#2004/06/03-2B 66 <br /> MW-5 >> MS Lab ID 2004-05-0856 -008 <br /> MS 2004106103-26 66-010 Extracted 06/03/2004 Analyzed 06/03/2004 22 10 <br /> Dilution 1 00 <br /> MSD 2004106103-2B 66-034 Extracted 06/03/2004 Analyzed 06/03/2004 22 34 <br /> Dilution • 1 00 <br /> Compound Conc u !L S k Level Recove ry% Limits% Flag s <br /> MS MSD Sample u /L MS MSD RPD Rec RPD MS MSD <br /> Methyl tert-butyl ether 236 235 0 578 25 921 91 7 04 65-165 20 <br /> Benzene 21 9 248 ND 25 87 6 992 124 69-129 20 <br /> Toluene 229 240 ND 25 91 6 960 4 7 70-130 20 <br /> Surrogate(s) <br /> 1 2-Dichloroethane-d4 527 512 500 1054 1024 72-128 <br /> Toluene-d8 1533 531 500 1066 1062 80-113 <br /> Severn Trent Laboratories, Inc 06107120041604 <br /> STI, San Francisco'1220 Quarry Lane Pleasanton CA 94566 <br /> A part of savers Trent Pic Tel 925 484 1919 Fax 925 484 1096'www stl-inc com'CA DHS FLAP#2496 Page 18 of 19 <br />