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Submission#- 2002-11.0523 <br /> ®® STL <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 11/22/2002 12 45 <br /> Tosco# 5886 <br /> Site 2701 West March Avenue <br /> Stockton, CA <br /> Batch QC Report <br /> Prep(s) 50308 Test(s) 8260E <br /> Laboratory Control Spike Water QC Batch# 2002112102-0127 <br /> LCS 2002112102-01 27-006 Extracted 12/0212002 Analyzed 12/02/2002 14 46 <br /> LCSD 2002112/02-01.27-007 Extracted 12/02/2002 Analyzed 12/0212002 15 15 <br /> Compound Conc ug/L Exp Conc Recovery IRPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS I LCSD <br /> Methyl tert-butyl ether (MTBE) 284 279 250 1136 1116 1 8 65-165 20 <br /> Benzene 247 252 25 0 988 1008 2 0 69-129 20 <br /> Toluene 24 0 246 25 0 960 984 2 5 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 440 430 500 880 860 76-114 <br /> Toluene-d8 1 478 482 500 .956 964 88-1101 1 <br /> Severn Tient Laboratories, Inc 12/05/2002 1412 <br /> STL San Francisco'1220 Quarry Lane, Pleasanton,CA 94566 Page 2b of 29 <br /> A part d Se"M Trent Plc Tel 928 484 1919 Fax 925 484 1096'www stl-inc corn. CA DHS ELAN 2496 9 <br />