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Submission # 2003-02-0397 <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> Gettler Ryan <br /> Attn Scott Polston <br /> 6747 Sierra Court Suite J <br /> Dublin, CA 94568 <br /> Phone (925) 551-7555 Fax (925) 551-7899 <br /> Project Tosco#11192 Received 02/20/2003 13 50 <br /> -- __Site-_1403 Country-Club-Blvd <br /> Stockton, CA <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch # 2003102121-01 27 <br /> LCS 2003102121-01 27-003 Extracted 02/21/2003 Analyzed 021211200311 22 <br /> LCSD 2003102121-01 27-004 Extracted 02/21/2003 Analyzed 021211200311 48 <br /> Compound Conc ug/L Exp Conc Recovery RPDJ Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % I Rec I.IPD LCS LCSD <br /> Benzene 235 232 250 94 0 928 1 3 69-129 20 <br /> Toluene 234 226 25 0 936 904 3 5 70-130 20 <br /> Methyl tert-butyl ether(MTBE) 25 8 26 4 250 1032 1056 2 3 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 527 525 500 105 4 105 0 76-114 <br /> Toluene-dB 473 493 1500 1946 1986 1 1 88-110 <br /> Severn Trent Laboratories, Inc 03/04/2003 10 51 <br /> STL San Francisco' 1220 Quarry Lane Pleasanton CA 94566 Page 5 of 6 <br /> A put of S...rn T—t Plc Tel 925 484 1919 Fax 925 484 1096*www stl-inc com'CA DHS ELAP#2496 <br />