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1 STL Submission: 2005-02-0734 <br /> GasIBTEX Fuel Oxygenates by 8260B <br /> 1 SECOR-Sacramento <br /> Attn.: Clint Harms <br /> t3017 Kilgore Road, Suite 100 <br /> Rancho Cordova, CA 95670 <br /> Phone: (916)861-0400 Fax: (916) 861-0430 <br /> Project: Conoco Philips Site#Circle K Store#1205 Received: 02/24/2005 15:10 <br /> Site: 16470 Cambridge Drive, Lathrop, CA <br /> 1 <br /> Batch QC Report <br /> Prep(s): 5030B Test(s):8260B <br /> Matrix Spike ( MS 1 MSD) Water QC Batch#2005103103-1B.68 <br />' MS/MSD Lab ID: 2005-02-0769-002 <br /> MS: 2005103103-113.68-025 Extracted:03/03/2005 Analyzed: 03/03/2005 08:25 <br /> Dilution: 1.00 <br />' MSD: 2005103103-1 B.68-043 Extracted:03/03/2005 Analyzed: 03/03/2005 08:43 <br /> Dilution: 1.00 <br />,. Compound Conc. u 1L S k.Leve Recove % Limits% Fla g- <br /> IVIS r23.O <br /> Sample u 1L MS MSD RPD Rec. RPD MS MSD <br /> Methyl tert-butyl ether 22.7 0.709 25 88.0 93.6 6.2 65-165 20 <br /> Benzene 20.4 ND 25 81.6 92.0 12.0 69-129 20 <br /> Toluene 20.7 ND 25 82.8 92.4 11.0 70-130 20 <br /> Surrogate(s) <br /> ' 1,2-Dichloroethane-d4 517 516 500 103.4 103.2 73-130 <br /> Toluene-d8 544 525 1 1 500 108.8 105.0 81-114 <br /> 1 <br /> 1 <br /> • Severn Trent Laboratories, Inc. 03/07/2005 15:50 <br /> STL San Francisco1220 Quarry Lane,Pleasanton,CA 94566 <br /> A Pan o,Severn Ven[Pic Tel 925 484 1919 Fax 925 484 1096*www.sti-inc.com"CA DNS FLAP#2496 Page 9 of 10 <br />