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� © STL <br /> GasIBTEX Fuel Oxygenates by 82608 Submission 2004-11-0843 <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 11129/2004 18 20 <br /> Conoco Phillips#08671 <br /> Site 8606 Thornton Road, Stockton <br /> Batch QC Report <br /> Prep(s) 50308 Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch#2004112104--2 64 <br /> LCS 2004112/04--2 64-004 Extracted 12/04/2004 Analyzed 12/04/2004 17 04 <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) 251 25 1004 65-165 20 <br /> Benzene 242 25 968 69-129 20 <br /> Toluene 242 25 968 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 470 500 940 73-130 <br /> Toluene-d8 455 500 910 81-114 <br /> • Severn Trent Laboratories, Inc 12/10/2004 1721 <br /> STL San Francisco`1220 Quarry Lane Pleasanton,CA 94566 <br /> A oars or 5e ern TreM Pk Tel 925 484 1 91 9 Fax 925 484 1096`www stl-inc com'CA DHS FLAP#2496 Page 16 of 24 <br />