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EMS STL <br /> 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 12/01/2004 09 30 <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 #2004112!02-1A 62 <br /> MS/MSD Lab ID 2004-11-0645-001 <br /> MS 2004112102-1A 62-044 Extracted 12/02/2004 Analyzed 12102/2004 10 44 <br /> Dilution 100 <br /> MSD 2004112102-1A 62-031 Extracted 12/02/2004 Analyzed 12/02/2004 11 31 <br /> Dilution 100 <br /> Compound Conc u /L Spk Leve Recove % Limits% Fla s <br /> MS MSD Sample u /L MS MSD RPD Rec RPD MS MSD <br /> Methyl Cert-butyl ether 266 34 1 ND 25 1064 1364 247 65-165 20 R8 <br /> Benzene 249 267 ND 25 996 1068 70 69-129 20 <br /> Toluene 281 291 ND 25 1124 1164 36 70-130 20 <br /> Surrogate{s) <br /> 1 2-Dichloroethane-d4 535 570 500 1070 1140 73-130 <br /> Toluene-d8 502 534 500 1 100 5 106 8 81-114 <br /> i <br /> Severn Trent Laboratories, Inc 12108/2004 13 51 <br /> STL San Francisco"1220 Quarry Lane Pleasanton CA 94566 <br /> Aped a Se"m Trent Pk Tel 925 484 1919 Fax 925 484 1096`www stl-inc com"CA DHS ELAP#2496 Page 7 of 8 <br />