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it <br /> Mm'" STL <br /> Submission#: 2003-04-0705 <br /> eta MOM <br /> GasIBTEX Fuel Oxygenates by 8260B <br /> Gettler Ryan <br /> Atte Deanna Harding <br /> 6747 Sierra Court Suite J <br /> Dublin, CA 94568 <br /> Phone (925) 551-7444 Fax (925) 551-7899 <br /> Project 160183 80 Received 04/28/2003 18 17 <br /> Tosco#01205 <br /> Site 16470 Cambridge Street <br /> Lathrop, CA <br /> Batch QC Report <br /> rninri .. rurnn <br /> Prep(s) 5030B Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch #2003105109-18.64 <br /> LCS 2003105109-18 64-037 Extracted 05/09/2003 Analyzed 05/09/2003 09 30 <br /> LCSD 2003105109-1B 64-038 Extracted 05/09/2003 Analyzed 05/0912003 09 52 <br /> Compound Conc ug/L Exp Conc Recovery RPD Ctrl Limits % Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Benzene 237 238 25 948 952 0 4 69-129 20 <br /> Toluene 244 239 25 976 956 21 70-130 20 <br /> Methyl tert-butyl ether(MTBE 273 277 125 1092 1108 15 i 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 522 515 500 1044 1030 76-114 <br /> Toluene-d8 495 483 500 99 0 966 88-110 <br /> Severn Trent Laboratories, Inc 051131200312 07 <br /> STL San Francisco- 12200uarry Lane Pleasanton,CA 94566 <br /> A oan cN ser 'rem PR Tel 925 484 1919 Fax 925484 10%'www stl-Inc corn'CA QHS ELAP#2496 Page 25 of 27 <br />