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STT Submission# 2004-01-0264 <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 Conoco Philips#5886 Received 01/09/2004 17 10 <br /> Site 2701 West March Lane, Stockton <br /> Batch QC Report <br /> Y II <br /> Prep(s) 50306 Test(s) 8260E <br /> Laboratory Control Spike Water QC Batch#2004101120-1A 68 <br /> LCS 2004101120-1A 68-053 Extracted 01/20/2004 Analyzed 01/20/2004 17 53 <br /> LCSD 2004101120-1 A 68-012 Extracted 01/20/2004 Analyzed 01/20/2004 18 12 <br /> Compound Conc ug/L Exp Conc Recovery % RPDJ Gtrl Limits % Flags <br /> LCS LCSD LCS LCSD % I Rec RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 186 188 25 74 4 75 2 1 1 65-165 20 <br /> Benzene 19 2 209 25 76 8 836 8 5 69-129 20 <br /> Toluene 198 21 3 25 79 2 852 7 3 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 473 442 500 94 6 884 76-114 <br /> Totuene-d8 491 484 500 98 2 96 8 1 88-110 <br /> • <br /> Severn Trent Laboratories, Inc 01/21/200417 38 <br /> STL San Francisco'1220 Quarry Lane Pleasanton,CA 94566 <br /> A pan of Severn Tlenl Plc Tel 925 484 1919 Fax 925 484 1096.www stl-inc corn'CA DHS ELAP##2496 Page 8 of 9 <br />