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STLSubmission #: 2003-08-0193 <br /> GasIBTEX Fuel Oxygenates by 82608 • <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 08/06/2003 16 00 <br /> Conoco#5886 <br /> Site 2701 West March Lane, Stockton <br /> r ' Batch QC Report <br /> Prep(s) 50306 Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch,#2003108115-2D 64 <br /> LCS 2003108115-2D 64-027 Extracted 08/15/2003 Analyzed 08/15/2003 22 27 <br /> LCSD 2003108115-2D 64-049 Extracted 08/15/2003 Analyzed 08/15/2003 22 49 <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits % Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Benzene 267 288 25 1068 1152 7 6 69-129 20 <br /> Toluene 285 31 1 25 1140 1244 8 7 70-130 20 <br /> Methyl tert-butyl ether(MTBE) 278 288 25 1112 1152 3 5 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 483 471 500 966 94 2 76-114 <br /> Toluene-d8 491 514 500 982 1028 88-110 <br /> Severn Trent Laboratories, Inc 0811812003 16 45 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton,CA 94566 Page 27 of 32 <br /> A part of Sv, m Trent Plc Tel 925 484 1919 Fax 925 484 1096-www stl-inc com'CA DHS ELAN 2496 <br />