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hl P <br /> OEM STL Submission # 2003-08-0193 <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> Gettler Ryan <br /> Attn Deanna Harding <br /> 6747 Sierra Court Suite J <br /> Dublin, CA 94568 <br /> Phone (925) 551-7444 Fax (925) 551-7899 <br /> Project 180137 80 Received 08/0612003 16 00 <br /> Conoco#5886 <br /> - Site 2701 West March Lane, Stockton <br /> Batch QC Report <br /> Prep(s) ,,,< 50306 ! w -,-Test(s) 8260FAB <br /> Matrix Spike ( MS 1 MSD) - Water QC Batch#2003!08115-2A 66 <br /> -MW-101) `» MS ' Lab ID h 2003-08-0193 -021 <br /> MS 2003108115-2A 66-006 Extracted 08/1612003 Analyzed 08/16/2003 01 06 <br /> x Dilution 100 <br /> MSD 2003/08/15-2A66-030 Extracted 08/16/2003 Analyzed 08116/2003 01 30 <br /> Dilution 1 <br /> Compound Cone ug/L Spk Level Recove % Limits% Fla s <br /> MS MSD Sample u /L MS MSD RPD Rec RPD MS MSD <br /> Benzene 326 311 ND 25 1304 1244 4 7 69-129 20 mso <br /> Toluene 316 280 ND 25 1264 1120 121 70-130 20 <br /> Methyl tent-butyl ether 321 301 ND 25 1284 1204 6 4 65-165 20 <br /> Surrogate(s) <br /> 1,2-Dchloroethane-d4 591 _ 566 - -500 - 1182- 1132 - — -176-114- - — sh - - <br /> Toluene-d8 532 512 500 1064 102 4 88-110 <br /> • <br /> Severn Trent Laboratories, Inc 08118/20031645 <br /> STL San Francisco*1220 Quarry Lane,Pleasanton,CA 94566 Page 29 of 32 <br /> A part o15a"m Trent Plc Tel 925 484 1919 Fax 925 484 1096-www stl-inc corn*CA DHS ELAN 2496 <br />