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ST L Submission: 2004-10-0766 <br /> Gas/BTEX/MTBE by 82608 <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: 10/22/2004 14:05 <br /> Site: 16500 Louise, Lathrop, CA <br /> Batch QC Report <br /> Prep(s): 5030B Test(s):8260E <br /> Matrix Spike ( MS I MSD) Water QC Batch#2004110129-1 E.64 <br /> MW-10 >> MS Lab ID: 2004-10-0766-002 <br /> MS: 2004110129-1E.64-015 Extracted: 10/2912004 Analyzed: 101291200410:15 <br /> Dilution: 1.00 <br /> MSD: 2004110129-1 E.64-038 Extracted: 10129/2004 Analyzed: 10/29/2004 10:38 <br /> Dilution: 1.00 <br /> Compound Conc. u IL Spk.Level Recove % Limits% Flags <br /> MS MSD Sample u 1L MS MSD RPD Rec. RPD MS MSD <br /> Benzene 25.4 21.7 ND 25 101.6 86.8 15.7 69-129 20 <br /> Toluene 25.8 22.4 ND 25 103.2 89.6 14.1 70-930 20 <br /> Methyl tett-butyl ether 27.3 23.9 ND 25 109.2 95.6 13.3 65-165 20 <br /> Surrogate(s) <br /> 1,2-131chloroethane-d4 521 513 500 104.2 102.6 72-128 <br /> Toluene-d8 519 510 500 103.8 102.0 80-113 <br /> Severn Trent Laboratories, Inc. 111021200414:09 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton,CA 94566 <br /> A part of Sevem Tmnl Plc Tel 925 484 1919 Fax 925 484 1096'www.stl-inc.com'CA DHS ELAP#2496 Page 8 of 10 <br />