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TLSubmission 2005-06-0197 <br /> Gas/BTEX Fuel Oxygenates by 82608 <br /> TRC Alton Geoscience- Irvine <br /> Attn An1u 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) 50308 Test(s) 8260B <br /> Laboratory Control Spike Water QC Batch#2005106118-1A 64 <br /> LCS 2005106118-1A 64-020 Extracted 06/18/2005 Analyzed 06/18/2005 06 20 <br /> LCSD <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) 246 25 984 65-165 20 <br /> Benzene 260 25 1040 69-129 20 <br /> Toluene 277 25 1 1108 70-130 20 <br /> Surrogates(s) <br /> 1 2-Dichloroethane-d4 443 500 886 73-130 <br /> Toluene-d8 501 500 1002 81-114 <br /> i <br /> Severn Trent Laboratories, Inc 06/25/2005 12 58 <br /> STL San Francisco'1220 Quarry Lane Pleasanton CA 94566 <br /> Apart M Swam Trent Pic Tel 925 484 1919 Fax 925 484 1096`www stl-inc corn'CA CHS FLAP#2496 Page 16 of 22 <br />