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•3 <br /> ® Submission 2005-05-0813 <br /> • <br /> BTEX Ox b 8260B <br /> Gas! Fuel Oxygenates y <br /> TRC Alton Geosclence- Irvine <br /> Attn Anlu Farfan <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone (949) 341-7440 Fax (949)753-0111 <br /> Protect 41050001 FA20 Received 05/31/2005 16 13 <br /> Conoco Phillips# 11192 <br /> Site 1403 Country Club Blvd, Stockton <br /> r <br /> Batch QC Report ` � - <br /> tx <br /> -Prep(s) 5030E - � - - x= � .Test(s) 8260B <br /> �- <br /> Laboratory Control Spike (Nater QC Batch#2005106109-1A 68 <br /> dLCS 2005106109-1A 68-041 Extracted 06/09/2005 W `Analyzed 06/09/2005 14 41 <br /> LCSD W t <br /> Compound Conc ug/L Exp Conc. Recovery% RPD Ctrl Limits % Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> i� <br /> Methyl tert-butyl ether(MTBE) 263 25 1052 65-165 20 <br /> Benzene 281 25 1124 69-129 20 <br /> Toluene 308 25 1232 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 470 500 940 73-130 <br /> Toluene-d8 481 500 962 81-114 <br /> • <br /> Severn Trent Laboratories, Inc 06120/200518 37 <br /> STL San Francisco'1220 Quarry Lane Pleasanton CA 94566 <br /> Apart W Sevem Trent Plc Tel 925 484 1919 Fax 925 484 1096'www stl-inc corn`CA DHS ELAP#2496 Page 20 of 32 <br />