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STLSubmission: 2005-02-0540 <br /> 4-fTk <br /> Gas/BTEX 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: 02/16/2005 12:18 <br /> Conoco Phillips# 11195 <br /> Site: 16500 S. Interstate 5 Lathrop <br /> Batch QC Report <br /> Prep(s): 5030E Test(s):8260B <br /> Matrix Spike (MS LMSD ) Water QC Batch#2005102125-3A.62 <br /> MS/MSD Lab ID: 2005-02-0620-001 <br /> MS: 2005102125-3A,62-051 Extracted:02/25/2005 Analyzed: 02/25!200520:51 <br /> Dilution: 1.00 <br /> n1ISQ: 2005102125-3A,62-017 Extracted:02/25/2005 Analyzed: . 02/25/2005 21:17 <br /> Dilution: 1.00. <br /> ' <br /> Compound Conc. uglL Spk.Levei Recovery% Limits% Flags <br /> MS MSD Sample ug1L MS MSD RPD Rec. RPD MS MSD <br /> Methyl tert-butyl ether 28.6 27.7 1.68 25 107.7 104.1 3.4 65.165 20 <br /> Benzene 27.4 28.1 0.617 25 107-1 109.9 2.6 69-129 20 <br /> Toluene 26.9 25.6 ND 25 107.6 102.4 5.0 70-130 20 <br /> Surrogate(s) <br /> 1,2-Dichloroethane-d4 489 490 500 97.8 98.0 73-130 <br /> Toluene-d8 546 538 500 109.2 107.6 81-114 <br /> s Severn Trent Laboratories, Inc. 03/02/2005 17:58 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton,CA 94566 <br /> A pahof Severn T..1 Plc Tel 925 484 1919 Fax 925 484 1096`www.sti-ine.com'CA DHS ELAP#2496 Page 32 of 36 <br />