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r • <br /> ST L Submission#: 2004-05-0855 <br /> Gas/BTEX Fuel Oxygenates by 82608 <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: 05/24/2004 11:50 <br /> Conoco Phillips# 11195 <br /> Site: 16500 South Interstate 5 Lathrop <br /> Batch QC Report <br /> Prep(s): 5030B Test(s): 8260FAB <br /> Laboratory Control Spike Water QC Batch#2004106104-2A.64 <br /> LCS 2004106104-2A.64-006 Extracted: 06/0412004 Analyzed: 061041200418:06 <br /> LCSD 2004106104-2A.64-028 Extracted: 06/04/2004 Analyzed: 06104/200418:28 <br /> Compound Conc. ug/L Exp.Conc. Recovery% RPD CtrLLimits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 27.9 29.4 25 111.6 117.6 5.2 65-165 20 <br /> Benzene 24.7 25.4 25 98.8 101.6 2.8 69-129 20 <br /> Toluene 26.6 27.6 25 106.4 110.4 3.7 70-130 20 ?rrsr- <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 475 476 500 95.0 95.2 72-128 <br /> Toluene-d8 496 473 500 99.2 94.6 80-113 <br /> Severn Trent Laboratories, Inc. 06/07/2004 13:0::r=31 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton,CA 94566 <br /> A pari of Severn Trent Pk Tel 925 484 1919 Fax 925 484 1096"www.sti-inc.com'CA DHS ELAP#2496 Page 29 of 31 <br />