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Submission # 2002-10-0036 <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> 1 Gettler Ryan STL San Francisco <br /> S Attn Deanna Harding 1220 Quarry Lane <br /> Pleasanton,CA 94566 <br /> 6747 Sierra Court Suite J <br /> Dublin, CA 94568 Tel (925)484-1919 <br /> Phone (925) 551-7444 Fax (925) 551-7899 Fax (925)484-1096 <br /> www stl-inc com <br /> Project 180138 80 Received 10/01/2002 14 10 www chrornalab corn <br /> Tosco#6981 <br /> Site 4707 Pacific Avenue CA DHS ELAP#2496 <br /> Stockton, CA <br /> Batch QC Report <br /> -Preps) 5030E Test(s) 8260E <br /> Laboratory Control Spike Water QC Batch # 2002/10110-01.27 <br /> LCS 2002110110-0127-007 Extracted 10/1012002 Analyzed 10/101200211 55 <br /> LCSD 2002110/10-0127-005 Extracted 10/10/2002 Analyzed 10/101200211 10 <br /> Compound Conc ug/L. Exp Conc Recovery RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 21 8 239 250 872 956 92 65-165 20 <br /> Benzene 227 256 25 0 90 8 1024 120 69-129 20 <br /> Toluene 231 255 250 92 4 1020 9 9 i 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 511 500 500 1022 1000 76-114 <br /> Toluene-d8 530 516 500 1060 1032 88-110 <br /> 0 <br /> 10/15/2002 1110 STL San Francisco is part of Severn Trent Laboratories, Inc Page 18 of 21 <br />