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STL <br /> Submission# 2004-02.0499 <br /> Gas/BTEX Fuel Oxygenates 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 Received 02/1612004 16 40 <br /> Conoco Philips# 11192 <br /> Site 1403 Country Club Dr , Stockton <br /> Batch QC Report <br /> i <br /> Prep(s) 50308 Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch#2004102124-1A 68 <br /> LCS 2004102124-1A 68-038 Extracted 02/24/2004 Analyzed 02/24/2004 10 38 <br /> LCSD 2004102124-1A 68-039 Extracted 02/24/2004 Analyzed 02/24/2004 09 48 <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 206 243 25 82 4 972 165 65-165 20 <br /> Benzene 208 243 25 83 2 97 2 155 69-129 20 <br /> Toluene 225 249 25 900 99 6 101 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 397 409 500 79 4 81 8 76-114 <br /> Toluene-d8 445 453 1500 189 0 90 6 1 188-1101 <br /> 04 <br /> Severn Trent Laboratories Inc 03/02/2004 <br /> STI_ San Francisco*1220 Quarry Lane Pleasanton CA 94568 <br /> A pen 0 Severn Trent Plo Tel 925 484 1919 Fax 925 484 1096*www stl-inc com*CA DHS FLAP#2496 Page 5 of 6 <br />