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S T L <br /> Submission: 2004-12-0056 <br /> Gas1BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geoscience-Irvine <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: 11/30/2004 16:07 <br /> Conoco Phillips#11195 <br /> Site: 16500 S. Interstate 5 <br /> Batch QC Report <br /> Prep(s): 50306 Test(s):8260FAB <br /> Matrix.Spike`(MS 1 MSD ] Water QC Batch#2004112108-1BA4 <br /> MS/MSD. Lab-ID; 2004-12-0137-002 <br /> MS: 2004/12/08-16.64-018 Extracted: 12/08/2004 Analyzed: .12/08/200410:18 <br /> Dilution: 1.00. <br /> MSD: 2004112108-113.64-040 Extracted:12/08/2004 Analyzed: 12/081200410:40 <br /> Dilution: 1.00 <br /> Compound Conc. u IL S k.l_evel Recovery% Limits% Fla s ~r` <br /> M5 MSO Sample ug/L MS I MSD RPD Rec. RPD MS MSD <br /> Benzene 25.6 24.6 NO 25 102.4 98.4 4.0 69-129 20 <br /> Toluene 25.4 24.6 ND 25 101.6 98.4 3.2 70-130 20 <br /> Methyl tort-butyl ether 25.3 24,8 ND 25 101.2 99.2 2.0 65-165 24 <br /> Surrogates) <br /> 1,2-Dichloroethane-d4 461 458 500 92.2 91.6 73-130 <br /> Toluene-d8 463 466 500 92.6 93.2 81-114 <br /> Severn Trent Laboratories, Inc. 12/14/2004 13:37 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton,CA 94566 <br /> A pad of S—V-1 Pik Tel 925 484 1919 Fax 925 484 1096'www.stl-inc,com'CA OHS ELAP#2496 Page 45 of 50 <br />