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ST L Submission: 2004-12-0151 <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: 12/02/2004 15:15 <br /> Site: 16500 S. Harland Rd., Lathrop, CA <br /> Batch QC Report <br /> Prep(s): 5030B Test(s):8260B <br /> Matrix Spike( MS 1 MSD ) Water QC Batch#2004112!08-1A.62 <br /> MS/MSD Lab ID: 2004-12-0175-004 <br /> MS: 2004112108-1A.62-048 Extracted: 12/08/2004 Analyzed: 12108/200414:48 <br /> Dilution: 1.00 <br /> MSD: 2004112108-1A.62-011 Extracted: 12/08/2004 Analyzed: 121081200415:11 <br /> Dilution: 1.00 <br /> - � Compound Conc. u /L S k.Leve Recove % Limits% Flags <br /> M5 MSD Sample u IL MS MSD RPD Rec. RPD Ms MSD <br /> Methyl tert-butyl ether 24.1 24.7 NO 25 96.4 98.8 2.5 65-165 20 <br /> Benzene 22.4 24.0 ND 25 89.6 96.0 6.9 69-129 20 <br /> Toluene 22.7 24.0 ND 25 90.8 96.0 5.6 70-130 20 <br /> Surrogate(s) <br /> 1,2-Dichloroethane-d4 524 520 500 104.8 104.0 73-130 <br /> Toluene-d8 543 539 500 108.6 107.8 1 81-114 <br /> Severn Trent Laboratories, Inc. <br /> 12/15/2004 17:26 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton,CA 94566 <br /> A part of sevem Tmni Plc Tel 925 484 1919 Fax 925 484 1096'www.stl-inc.com'CA DHS ELAP#2496 Page 9 of 10 <br />