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TL <br /> Submission#: 2003-11-0887 <br /> MMIUMM S <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): 50308 Test(s): 8260B <br /> Laboratory Control Spike Water QC Batch#2003112104-01.69 <br /> LCS 2003112/04-01.69-012 Extracted: 12/04/2003 Analyzed: 12/0412003.09:1.2 <br /> LCSD 2003112104-0.1.69-031 Extracted: 12/0412003 Analyzed: 12/04/2003 09:31 <br /> Compound Conc. ug/L Exp.Conc. Recovery% RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Benzene 19.3 19.0 25.0 77.2 76.0 1.6 69-129 20 <br /> f-ss-- Toluene 24.5 23.1 25.0 98.0 92.4 5.9 70-130 20 <br /> E:rr Methyl tert-butyl ether(MTBE) 18.7 19.6 25.0 74.8 78.4 4.7 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 427 404 500 85.4 80.8 76-114 <br /> Toluene-d8 522 485 500 104.4 97.0 88-110 <br /> s Severn Trent Laboratories, Inc. 121111200317:29 <br /> STL Sara Francisco'1220 Quarry Lane,Pleasanton,CA 94566 <br /> A pen d seven hent Plc Tel 925 484 1919 Fax 925 484 1096'www.stl-ine.com*CA DHS ELAP#2496 Page 26 of 30 <br />