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Submission 2005-07-0294 <br /> IN SIT <br /> • Gas/BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geoscience- Irvine <br /> Attn Anju Farfan <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone (949)341-7440 Fax (949)753-0111 <br /> Project 41050001 FA20 Received 07/12/2005 18 00 <br /> Conoco Phillips#4409 <br /> Site 1502 N EI Dorado St Stockton <br /> i Batch QC Report € <br /> Prep(s) 5030B _ - - Test(s) 8260B <br /> t8 w <br /> Laboratory Control Spike � Water QC Batch#2005!07123-1A 62 <br /> LCS 2005107123-1A 62-011 Extracted 07/23/2005 Analyzed 07/23/2005 07 11 <br /> LCSD <br /> Compound Conc ug/L Exp Conc Recovery% RPDJ Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % I Rec RPD LCS LCSD <br /> Methyl tort-butyl ether(MTBE) 234 25 936 65-165 20 <br /> • Benzene 237 25 948 69-129 20 <br /> Toluene 248 25 992 70-130 20 <br /> j <br /> Surrogates(s) <br /> 1 2-Dichloroethane-d4 437 500 874 73-130 <br /> Toluene-d8 492 500 984 81-114 <br /> I <br /> i <br /> I <br /> Severn Trent Laboratories, Inc 07/28/2005 17 27 <br /> STL San Francisco' 1220 Quarry lane Pleasanton CA 94566 <br /> Apart ors-re Trent Tel 925 484 1919 Fax 925 484 1096'www stl-inc corn'CA DHS ELAP#2496 Page 28 of 41 <br />