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ry i i <br /> �® STL Submission 2005-06-0197 <br /> i <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geoscience- Irvine <br /> Attn Anlu Farfan <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone (949) 341-7440 Fax (949)753-0111 <br /> Project 41050001 FA20 Received 06/07/2005 16 50 <br /> Conoco Phillips#5886 <br /> Site 2701 West March Lane Stockton, CA <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 8260E <br /> Laboratory Control Spike Water QC Batch#2005/06119-2A 66 <br /> LCS 2005106119-2A 66-059 Extracted 06/19/2005 Analyzed 06/19/2005 20 50 <br /> LCSD <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits % Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS I LCSD <br /> • Methyl tert-butyl ether(MTBE) 254 25 101 6 65-165 20 <br /> Benzene 236 25 944 69-129 20 <br /> Toluene 281 25 1124 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 434 500 868 73-130 <br /> Toluene-d8 494 1 500 1988 81-114 <br /> Severn Trent Laboratories, Inc 06/25/2005 12 58 <br /> STL San Francisco` 1220 Quarry Lane Pleasanton CA 94566 <br /> A part of SBvam Tmnt Plc Tel 925 484 1919 Fax 925 484 1096'www stl-inc com'CA DHS ELAP#2496 Page 18 of 22 <br />