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STLSubmission#: 2003-11-0599 <br /> Volatile Organic Compounds by 82608 (Low Level) <br /> Geomatrix Consultants <br /> Attn.: Robert Cheung <br /> 2101 Webster Street, 12th Floor <br /> Oakland, CA 94612 <br /> Phone: (510)663-4299 Fax: (510)663-4141 <br /> Project: 7066.001 Received: 11/17/2003 17:15 <br /> Batch QC Report <br /> Prep(s): 5035 Test(s): 8260B <br /> Laboratory Control Spike Soil QC Batch#2003/11/21-01.09 <br /> LCS 2003/11/21-01.09-002 Extracted: 11/21/2003 Analyzed: 11/21/2003 09:49 <br /> LCSD 2003/11/21-01.09-003 Extracted: 11/21/2003 Analyzed: 11/21/2003 10:24 <br /> Compound Conic. ug/Kg Exp.Conc. Recovery% RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Benzene 98.6 101 100.0 98.6 101.0 2.4 69-129 20 <br /> Chlorobenzene 102 102 100.0 102.0 102.0 0.0 61-121 20 <br /> 1,1-Dichloroethene 102 101 100.0 102.0 101.0 1.0 65-125 20 <br /> Toluene 96.7 97.1 100.0 96.7 97.1 0.4 70-130 20 <br /> Trichloroethene 96.4 101 100.0 96.4 101.0 4.7 74-134 20 <br /> Surrogates(s) <br /> 4-Bromofluorobenzene 484 474 500 96.8 94.8 74-121 <br /> 1,2-Dichloroethane-d4 477 485 500 95.4 97.0 70-121 <br /> Toluene-d8 483 495 500 96.6 99.0 81-117 <br /> Severn Trent Laboratories, Inc. 11/24/2003 15:29 <br /> STL San Francisco*1220 Quarry Lane,Pleasanton,CA 94566 <br /> A part of Severn Trent Plc Tel 925 484 1919 Fax 925 484 1096*www.stl-inc.com*CA DHS ELAP#2496 Page 84 of 87 <br />