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© Submission# 2004-01-0703 <br /> S T L <br /> Gas/BTEX Fuel Oxygenates by 82608 <br /> TRC Alton Geoscience <br /> Attn Antu Farfan <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone (949) 341-7440 Fax (949) 753-0111 <br /> Project 41050001 FA20 Received 01/27/2004 13 30 <br /> Conoco Phillips#01205 <br /> Site 16470 Cambridge St , Lathrop <br /> Batch QC Report <br /> Prep(s) 5030B - Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch #2004/02104-02 69 <br /> LCS 2004102104-02 69-007 Extracted 02104/2004 Analyzed 02/04/2004 18 07 <br /> LCSD 2004102104-02 69-025 Extracted 02/04/2004 Analyzed 02/04/2004 18 25 <br /> Compound Conc uglL Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS I LCSD <br /> Benzene 229 224 250 916 896 22 69-129 20 <br /> Toluene 244 242 250 97 6 96 8 08 70-130 20 <br /> Methyl tert-butyl ether(MTBE) 24 3 226 250 972 904 72 65-165 20 <br /> Surrogates(s) <br /> Toluene-d8 481 485 500 962 970 88-110 <br /> 1,2-Dichloroethane-t4 479 469 500 958 938 76-114 <br /> Severn Trent Laboratories, Inc 02/09/2004 17 51 <br /> STL San Francisco"1220 Quarry Lane Pleasanton CA 94566 <br /> A Pwt W Severn 7rw P. Tel 925 484 1919 Fax 925 484 1096`www stl-mc corn`CA DHS ELAP*2496 Page 20 of 23 <br />