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MENSTT Submission# 2004-12-0006 <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> URS Corporation <br /> Attn Vern Elarth <br /> 2870 Gateway Oaks Drive, Suite 300 <br /> Sacramento, CA 95833 <br /> Phone (916)679-2000 Fax (916)679-2900 <br /> Project Consultant Project No 38466452 00000 Received 12/0112004 09 30 <br /> BP Facility No 2186 <br /> Site 3212 North California Street <br /> Batch QC Re ort <br /> Prep(s) 50306 Test(s) 82606 <br /> Laboratory Control Spike Water QC Batch #2004112102-1A 62 <br /> LCS 2004112102-1A 62-015 Extracted 12/02/2004 Analyzed 1210212004 08 15 <br /> LCSD <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) 290 25 1160 65-165 20 <br /> Benzene 275 25 1100 69-129 20 <br /> Toluene 301 25 1204 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 531 500 1062 73-130 <br /> Toluene-d8 526 500 11052 1 81-114 <br /> Severn Trent Laboratories, Inc <br /> 12/08/2004 13 51 <br /> STL San Francisco"1220 Quarry Lane Pleasanton CA 94566 <br /> A PSN W S.—T-m Plc Tel 925 484 1919 Fax 925 484 1096"www sti-mc com'CA DHS FLAP#2496 Page 6 of 8 <br />