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r .. ..... <br /> STLSubmission M.2003-09-0854 I <br /> Gas/BTEX Compounds by 8015M/8021 <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#11195 Received:09/24/2003 13:00 <br /> Site, 16500 Louise Ave., Lathrop, CA <br /> Batch QC Report - <br /> Prep(s): 5030 Test(s):8021 B <br /> Laboratory Control Spike Water QC Batch:#2003110107=01.01 <br /> LCS 2003110107-01.01-005: Extracted: 101071200.3 Analyzed:.10/07/2003 08:42 <br /> LCSD2003110107-01.01-006 Extracted:10]0712003 Analyzed: 10/0712003 09:14 <br /> Compound Conic. ug/L Exp.Conc. Recovery% RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. I RPD LCS LCSD <br /> Benzene 110 106 100.0 110.0 106.0 3.7 77-123 20 <br /> Toluene 105 102 100.0 105,0 102.0 2.9 78-122 20 <br /> -f,%- Ethyl benzene 104 102 100.0 104.0 102.0 1,9 70-130 20 <br /> t. Xylene(s) 308 300 300 102.7 100.0 2.7 75-125 20 <br /> surrogates(s) <br /> Trifluorotoluene 491 497 500 98.2 99.4 58-124 <br /> -21 <br /> Severn Trent Laboratories, Inc. 10107/200317:39 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton,CA 94566 <br /> Ap,d,13 OMTmnlPte Tel 925 484 1919 Fax 925 484 1096*www.sti-inc.com*CA DHS ELAP#2496 Page 8 of 10 <br />