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STLSubmission #: 2003-11-0887 <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geoscience <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: 11/25/2003 15:00 <br /> Conoco Phillips#11195 <br /> Site: 16500 South Interstate 5, Lathrop <br /> Batch QC Report <br /> Prep(s): 50306 Test(s): 82606 <br /> Matrix Spike( MS IMSID Water QC Batch#2003112104-01.69 <br /> MW-10 >> MS Lab ID: 2003-11-0887 -004 <br /> MS: 2003/12104-01.69-006 Extracted:12/04/2003 Analyzed: 121041200314:06. <br /> Dilution: 1.00 <br /> MSD: 2003112104-01.69-025. Extracted:..12/0.4./2003 Analyzed: 12104/200314:25 <br /> Dilution: 1.00 <br /> Compound Conc. ug/t_ Spk.Level Recovery% Limits% Flags <br /> MS MSD Sample uglL MS MSD RPD - Rec. RPD MS MSD <br /> Benzene 18.2 18.4 ND 25.0 72.8 73.6 1.1 69-129 20 <br /> Toluene 21.5 21.8 0.640 25.0 83.4 84.6 1.4 70-130 20 <br /> Methyl left-butyl ether 24.2 26.2 3.12 25.0 84,3 92.3 9.1 65-165 20 <br /> sumgafe(s) <br /> 1,2-Dichloroelhane-d4 497 474 500 99.5 94.8 76-114 <br /> Toluene-d8 469 474 500 93.8 94.8 88-110 <br /> Severn Trent Laboratories, Inc. 12/11/2003 17:29 <br /> STL San Francisco*1220 Quarry Lane,Pleasanton,CA 94566 <br /> A pard of Severn Trent Plc Tel 925 484 1919 Fax 925 484 1096*www.stl-inc,com*CA DHS ELAP#2496 Page 29 of 30 <br />