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©® S i L Submission# 2003-11-0103 ' <br /> Gas/BTEX/MTBE by 8260B • <br /> SECOR-Sacramento <br /> Attn Rusty Benkosky <br /> 3017 Kilgore Road, Suite 100 <br /> Rancho Cordova, CA 95670 <br /> Phone (916) 861-0400 Fax (916)861-0430 <br /> Project 77CP 60004 00 6981 Received 11/0312003 17 05 <br /> Sit#6981 <br /> Site 4707 Pacific Ave Stockton,Ca <br /> Batch QC Report <br /> Prep(s) 50308 Test(s) B260B <br /> Laboratory Control Spike Water QC Batch#2003111111.2A 62 <br /> LCS 2003/11111-2A 62-001 Extracted 11/11/2003 Analyzed 11/11/2003 21 01 <br /> LCSD 2003111111-2A 62-023 Extracted 11/11/2003 Analyzed 11/11/2003 21 23 <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Methyl tort-butyl ether(MTBE) 249 227 25 996 908 92 65-165 20 <br /> Benzene 269 24 6 25 1076 984 89 69-129 20 <br /> Toluene 287 261 25 1148 1044 95 1 70-130 20 <br /> Surrogates(s) <br /> 1 2-Dichloroethane-d4 477 476 500 954 952 76-114 <br /> Toluene-d8 1485 1483 1 500 1970 1966 88-110 <br /> I <br /> Severn Trent Laboratories, Inc 51114!2003 15 00 <br /> STL San Francisco`1220 Quarry Lane Pleasanton CA 94566 Page 7 of 7 <br /> AW f S--T'W Pl- Tel 925 484 1919 Fax 925 484 1096'www stl inc corn'CA DHS ELAP#2496 <br />