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STLSubmission# 2004-12-0365 <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 12110/2004 09 45 <br /> BP Facility No 2186 <br /> Site 3212 North California Street <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 8260B <br /> Matrix Spike( MS 1 MSD) Water QC Batch#2004112111-1C 62, <br /> MS/MSD Lab ID 2004-12-0333-009 <br /> MS 2004/12/11-1 C 62-035 Extracted 12/11/2004 Analyzed 11211112004 13 54 <br /> Dilution 100 <br /> MSD 2004112111-1C 62-036 Extracted 12111/2004 Analyzed 12/11/2004 14 16 <br /> Dilution 100 <br /> Compound Conc u L Spk Leve Recove % Limits% Flags <br /> MS MSD Sample u MS MSD I RPD Rec RPD MS MSD <br /> Benzene 308 307 ND 25 1232 1228 03 69-129 20 <br /> Toluene 296 29 8 ND 25 1184 1192 07 70-130 20 <br /> Methyl tent-butyl ether 356 380 ND 25 1424 1520 65 65-165 20 <br /> Surrogate(s) <br /> 1,2-Dichioroethane-d4 588 570 500 1176 1140 73-130 <br /> Toluene-d8 543 531 500 108 6 106 2 1 81-114 <br /> Severn Trent Laboratories, Inc <br /> 12/28/2004 12 26 <br /> STL San Francisco'1220 Quarry Lane Pleasanton CA 94566 <br /> AtM 0(8'"MTrentHe Tet 925 484 1919 Fax 925 484 1096'www stl-inc com"CA DHS FLAP#2496 Page 7 of 7 <br />