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® STL Submission 2004-06-0618 <br /> • Gas/BTEX/MTBE 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 11193 Received 06/17/2004 14 35 <br /> Site 3202 West Hammer Lane, Stockton <br /> Batch QC Report <br /> Prep(s) 50308 Test(s) 8260B i <br /> Laboratory Control Spike Water QC Batch#2004/06125-1 C 66 <br /> LCS 2004106125-1 C 66-001 Extracted 06/25/2004 Analyzed 06/25/2004 09 01 <br /> LCSD 2004106125-IC 66-025 Extracted 06/25/2004 Analyzed 06/25/2004 09 25 <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS I LCSD <br /> Methyl tert-butyl ether(MTBE) 24 0 243 25 960 972 1 2 65-165 20 <br /> Benzene 21 7 224 25 868 896 32 69-129 20 <br /> • Toluene 245 250 25 980 1000 201 70-130 20 <br /> Surrogates(s) <br /> 1 2-Dichloroethane-d4 420 422 500 84 0 84 4 72-128 <br /> Toluene-d8 477 1476 500 954 952 180-1131 1 <br /> Severn Trent Laboratories Inc 06/29/2004 13 14 <br /> STL San Francisco*1220 Quarry Lane Pleasanton CA 94566 <br /> A part 0 8"am Tom:Pic Tel 925 484 1919 Fax 925 484 1096*www stl-inc com*CA DHS ELAP#2496 Page 10 of 11 <br />