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TLSubmission# 2004-08-0791 <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 08/31/2004 09 20 <br /> BP Facility No 2186 <br /> Site 3212 North Califomia Street`r� <br /> Batch QC Report <br /> Prep(s) 50308 ) Test(s) 8260B <br /> Laboratory Control!Spike 6wat <br /> r' QC Batch#2004/08/31-1 E 68 <br /> LCS 2004/08/31-1 E 68-010 Extracted 08/31/2004 Analyzed 08/31/2004 09 10 <br /> LCSD 2004/08/31-1 E 68-029 Extracted 08/31/2004 Analyzed 08/31/2004 09 29 <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) 21 9 248 25 876 992 124 65-165 20 <br /> • Benzene 215 245 25 86 0 980 130 69-129 20 <br /> Toluene 219 236 25 87 6 944 75 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 498 486 500 99 6 972 72-128 <br /> Toluene-d8 491 496 500 1982 1992 1 80-113 <br /> • Severn Trent Laboratories, Inc 0911512004 15 16 <br /> STL San Francisco' 1220 Quarry Lane Pleasanton,CA 94566 page 6 of 7 <br /> A P Swem trent vic Tel 925 484 1919 Fax 925 484 1096'www sti-inc corn'CA DHS EMAP#2496 <br />