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® STL Submission 2005-03-0108 <br /> Gas/BTEXIMTBE by 8260B <br /> SECOR-Sacramento <br /> Attn Amy Draffan <br /> 3017 Kilgore Road, Suite 100 <br /> Rancho Cordova, CA 95670 <br /> Phone (916)861-0400 Fax (916)861-0430 <br /> Project 77CP 60004 015886 Received 03/02/2005 16 00 <br /> Conoco Philips Site#5886 <br /> Site 3701 W March Lane, Stockton, CA <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 8260E <br /> Laboratory Control Spike Water QC Batch #2005/03111-1 C 68 <br /> LCS 2005103111-1C 68-025 Extracted 03/11/2005 Analyzed 03/11/2005 08 25 <br /> LCSD <br /> Compound Conc ug/L Exp Conc Recovery% RPDJ Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % I Rec I RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 242 25 968 65-165 20 <br /> Benzene 254 25 101 6 69-129 20 <br /> Toluene 251 25 1004 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 401 500 802 73-130 <br /> Toluene-d8 476 500 952 1 181-1141 <br /> Severn Trent Laboratories, Inc 03/17/2005 09 02 <br /> STL San Francisco`1220 Quarry Lane,Pleasanton,CA 94566 Page 8 of 11 <br /> A part of Sayam Trent Plc Tel 926 484 1919 Fax 925 484 1096'www stl-inc com"CA DHS FLAP#2496 <br />