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STLSubmission 2005-05-0368 <br /> Gas/BTEX/MTBE by 8260B <br /> SECOR-Sacramento <br /> Attn Chris Bovia <br /> 3017 Kilgore Road, Suite 100 <br /> Rancho Cordova, CA 95670 <br /> Phone (916) 861-0400 Fax (916) 861-0430 <br /> Project 77CP 68671 03 0006 Received 05/12/2005 17 20 <br /> Conoco Philips Site#8671 <br /> Site 8606 Thornton Rd , Stockton, CA <br /> Batch QC Report <br /> Prep(s) 5030E Test(s) 8260B <br /> Laboratory Control Spike Water QC Batch#2005/05/12-2B 69 <br /> LCs 2005105112-213 69-019 Extracted 05/12/2005 Analyzed 05/12/2005 19 19 <br /> LCSD <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits% f=lags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 249 25 996 65-165 20 <br /> �1 Benzene 260 25 1040 69-129 20 <br /> Toluene 258 25 1032 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dtchloroethane-d4 485 500 970 73-130 <br /> Toluene-d8 538 500 1076 81-114 <br /> si Severn Trent Laboratories, Inc 05/27/2005 13 50 <br /> STL San Francisco"1220 Quarry Lane,Pleasanton,CA 94566 <br /> A part a1 Sevem Troll Plc Tel 925 484 1919 Fax 925 484 1096"www stl-Inc corn`CA DHS FLAP#2496 Page 7 of 11 <br />