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i <br /> ST"( Submission 2004-07-0629 <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> SECOR-Sacramento <br /> Attn Gavan Heinrich <br /> 3017 Kilgore Road, Suite 100 <br /> Rancho Cordova, CA 95670 <br /> Phone (916)861-0400 Fax (916) 861-0430 <br /> Project 770P 60193 04 Received 07/21/2004 12 00 <br /> Conoco Philips Site#11193 <br /> Site 3202 West Hammer Lane, Stockton, CA <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch#2004107/29-2B 62 <br /> LCS 2004107129-213 62-032 Extracted 07/29/2004 Analyzed 07/29/2004 19 32 <br /> LCSD 2004107/29-213 62-024 Extracted 07/29/2004 Analyzed 07/29/2004 20 24 <br /> Compound Conc ug/L Exp Conc Recovery% RPDJ Ctrl Limits % Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS I LCSD <br /> Methyl tert-butyl ether(MTBE) 270 247 25 1080 988 89 65-165 20 <br /> Benzene 29 0 271 25 1160 1084 6 8 69-129 20 <br /> Toluene 308 306 25 1232 1224 0 7 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroelhane-d4 502 502 500 1004 1004 72-128 <br /> Toluene-d8 494 476 500 988 19,52 80-1131 1 <br /> Severn Trent Laboratories, Inc 09/08/2004 11 03 <br /> STL San Francisco'1220 Quarry Lane, Pleasanton,CA 94566 <br /> A Part of 6-YOM Tmat M Tel 925 484 1919 Fax 925 484 1o96"www sti-ine com'CA DHS ELAP#2496 Page 10 of 13 <br />