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---------- - _ ---- ------- - --- <br /> I <br /> STLSubmission#:2003-09-0854 <br /> Gas1BTEX Compounds by 8015M18021 <br /> SECOR-Sacramento <br /> Attn.: Rusty Benkosky <br /> 3017 Kilgore Road, Suite 100 <br /> Rancho Cordova,CA 95670 <br /> Phone: (916)861-0400 Fax: (916)861-0430 <br /> Project: ConocoPhillips 411195 Received; 09/24/2003 13:00 <br /> Site: 16500 Louise Ave., Lathrop, CA <br /> Batch QC.Report <br /> Prep(s): 5030 Test(s);8021B <br /> Laboratory Control Spike Water QC Batch#2003MO.1.064.7.01 <br /> LCS2003110106-01.01-004 Extracted-1010612:003 Analyzed: 10/0662003 07:54 <br /> LCSD 2o b3/10106-01-01-005 Extracted: 1010612003. : . Analyzed: 10/0612003 08;26 <br /> Compound Conc. uglL Exp.Conc. Recovery% RPD Ctrl,Limils% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Benzene 104 103 100.0 104.0 103.0 1.0 77-123 20 <br /> Toluene 99.9 98.7 100.0 99.9 98.7 1.2 78-122 20 <br /> Ethyl benzene 101 99.9 100 101.0 99.9 1.1 70 930 20 <br /> Xylene(s) 295 292 300 98.3 97.3 1.0 75-125 20 <br /> Surrogates(s) <br /> Trifluorotoluene 484 485 500 96.8 97.0 58-124 <br /> Severn Trent Laboratories, Inc. 10/07/2003 17:39 <br /> STL San Francisco`1220 Quarry Lane,Pleasanton,CA 94566 <br /> A p.,(.15—.T-1 Plc Tel 925 484 1919 Fax 925 484 1096*www.sti-inc.com*CA BHS ELAP#2496 Page 6 of 10 <br />