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STLSubmission# 2003-12-0040 <br /> . Gas/BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geoscience <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 12/01/2003 17 17 <br /> Conoco Phillips#11192 <br /> Site 1403 Country Club Blvd Stockton <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 82606 <br /> Matrix Spike ( MS 1 MSD ) Water QC Batch#2003!12105-26 69 <br /> MW-9 >> MS Lab ID 2003-12-0040 -002 <br /> MS 2003112105-26 69-043 Extracted 12/05/2003 Analyzed 12105/2003 20 27 <br /> Dilution 1 00 <br /> MSD 2003112105-213 69-044 Extracted 12/05/2003 Analyzed 12/05/2003 20 46 <br /> Dilution 1 DO <br /> Compound Conc Ug!L Spk Leve Recove % Limits% Flags <br /> MS MSD sample u /L MS MSD I RPD Rec RPD MS MSD <br /> Benzene 172 164 ND 25 688 656 48 69-129 20 mso mso <br /> Toluene 191 171 ND 25 764 684 110 70-130 20 mso <br /> Methyl tert-butyl ether 181 156 ND 25 724 624 148 65-165 20 mso <br /> Surrogate(s) <br /> 1 2-Dichloroethane-d4 522 476 500 1044 952 76-114 <br /> Toluene-d8 525 436 500 1050 1872 88-110 Sim <br /> Severn Trent Laboratories, Inc 12/11/2003 17 29 <br /> STL San Francisco'1220 Quarry Lane Pleasanton CA 94565 <br /> A part of Sevem Trerrt PSc Tel 925 484 1919 Fax 925 484 1096 a www stl-mC Com'CA DHS FLAP#2496 Page 22 of 23 <br />