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4p v� <br /> ST I L <br /> Submission 2005-05-0813 ' <br /> GaslBTEX Fuel Oxygenates by 82606 <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 41050001FA20 Received 05131/20051613 <br /> Conoco Phillips# 11192 <br /> Site 1403 Country Club Blvd, Stockton <br /> � Batch QC Report <br /> Prep(s) 50306 Tests) 8260E <br /> Matrix Spike'( MS 1 MSD} Water_nm � QC Batch#2005106109-1A 68 <br /> MS/MSD - Lab ID 2005-06-0104 =003 <br /> MS 2005106109-1A 68-050 _ Extracted 06/09/2005 Analyzed 06/09/2005 15 50 ` <br /> - _ _ Dilution 100 <br /> MSD 2005106109-1A 68-007 Extracted 06/09/2005 Analyzed- 06/0912005 16 07 <br /> Dilution 1 00 <br /> Compound Conc ug/L Spk Level Recove % Limits% Flags <br /> M5 MSD Sample u IL MS MSD RPD Rec RPD MS MSD <br /> Methyl tent-butyl ether 254 238 ND 25 101 6 952 65 65-165 20 <br /> Benzene 269 277 ND 25 1076 1108 2 9 69-129 20 <br /> Toluene 29 5 290 ND 25 1180 1160 1 7 70-130 20 <br /> Surrogate(s) <br /> 1 2-Dichloroethane-d4 500 493 500 999 98 6 73-130 <br /> Toluene-d8 459 453 504 91 8 1907 81-114 <br /> • <br /> Severn Trent Laboratories, Inc 05/20120051837 <br /> STL San Francisco" 1220 Quarry Lane Pleasanton CA 94566 <br /> A part of Sevam hent Plc Tel 925 484 1919 Fax 925 484 1096*www stl-inc com*CA DHS FLAP#2496 Page 26 of 32 <br />