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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#2003/11/20-01.09 <br /> LCS 2003/11/20-01.09-002 Extracted: 11/20/2003 Analyzed: 11/20/2003 09:47 <br /> LCSD 2003/11/20-01.09-003 Extracted: 11/20/2003 Analyzed: 11/20/200310:23 <br /> Compound Conic. ug/Kg Exp.Conc. Recovery% RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Benzene 97.2 101 100.0 97.2 101.0 3.8 69-129 20 <br /> Chlorobenzene 100 101 100.0 100.0 101.0 1.0 61-121 20 <br /> 1,1-Dichloroethene 99.3 106 100.0 99.3 106.0 6.5 65-125 20 <br /> Toluene 93.0 95.4 100.0 93.0 95.4 2.5 70-130 20 <br /> Trichloroethene 94.8 102 100.0 94.8 102.0 7.3 74-134 20 <br /> Surrogates(s) <br /> 4-Bromofluorobenzene 493 488 500 98.6 97.6 74-121 <br /> 1,2-Dichloroethane-d4 491 492 500 98.2 98.4 70-121 <br /> Toluene-d8 476 486 500 95.2 97.2 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 83 of 87 <br />