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mEmm STL Submission # 2003-07-0808 <br /> Gas1BTEX 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 180183 80 Received 07/28/2003 11 00 <br /> Conoco#01205 <br /> Site 16470 Cambridge Street, Lathrop <br /> Batch QC Report <br /> Prep(s) 5030E Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch #2003108107-1A 64 <br /> LCS 2003108107-1 A 64-001 Extracted 08/07/2003 Anal ed 08/07/2003 09 01 <br /> LCSD 2003108107-1A 64-023 Extracted 08/07/2003 Analyzed 08/07/2003 09 23 <br /> Compound Conc uglL Exp Conc Recovery% RPDJ Ctrl Limits % Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Benzene 22 7 260 25 90 8 1040 136 69-129 20 <br /> Toluene 225 26 0 25 90 0 1040 144 70-130 20 <br /> Methyl tent-butyl ether(MTBE) 229 25 8 25 91 6 1032 11 9 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 540 534 500 1080 1068 76-114 <br /> Toluene-d8 496 481 500 99 2 .962 88-110 <br /> 08/18/2003 14 25 <br /> Severn Trent Laboratories, Inc <br /> STL San Francisco' 1220 Quarry Lane,Pleasanton,CA 94566 Page 21 of 24 <br /> A pan W Sevem Trent Plc Tel 925 484 1919 Fax 925 484 1096`Www sti-inc eem"CA DHS ELAN 2496 <br />