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STLSubmission: 2004-12-0151 <br /> Gas/BTEX/MTBE by 8260B <br /> SECOR-Sacramento <br /> Attn.:Amy Draffan <br /> 3017 Kilgore Road, Suite 100 <br /> Rancho Cordova, CA 95670 <br /> Phone: (916) 861-0400 Fax: (916)861-0430 <br /> Project: Conoco Philips Site#11195 Received: 12/02/2004 15:15 <br /> Site: 16500 S. Harland Rd., Lathrop, CA <br /> Batch QC Report <br /> Prep(s): 5030B Test(s): 82608 <br /> Laboratory Control Spike Water QC Batch#2004112107-2C.68 <br /> LCS 2004112107-2C.68-041 Extracted: 12/07/2004 Analy7ed: 12/07/200418:41 <br /> LCSD <br /> Compound Conc. uglL Exp.Conc. Recovery% RPD Ctri.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 21.3 25 85.2 65-165 20 <br /> Benzene 19.7 25 78.8 69-129 20 <br /> Toluene 20.4 25 81.6 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 424 500 84.8 73-130 <br /> Toluene-d8 1447 1 1500 189.4 1 1 81-114 <br /> Severn Trent Laboratories, Inc. 121151200417:26 <br /> STL San Francisco*1220 Quarry Lane,Pleasanton,CA 94566 <br /> Apart of S—rn Trani Plc Tel 925 484 1919 Fax 925 484 1096*uwvw.sti-inc.com*CA DHS ELAP#2496 Page 6 of 10 <br />