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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 /> Matrix Spike(MS/MSD) Soil QC Batch#2003/11/21-01.09 <br /> GMX-10-5.0 » MS Lab ID: 2003-11-0599-026 <br /> MS: 2003/11/21-01.09-015 Extracted: 11/21/2003 Analyzed: 11/21/2003 15:48 <br /> Dilution: 1.00 <br /> MSD: 2003/11/21-01.09-016 Extracted: 11/21/2003 Analyzed: 11/21/2003 16:14 <br /> Dilution: 1.00 <br /> Compound Conic. ug/Kg Spk.Level Recovery% Limits% Flags <br /> MS MSD Sample ug/Kg MS MSD RPD Rec. RPD MS MSD <br /> Benzene 98.3 94.6 ND 98.4 99.9 98.3 1.6 69-129 20 <br /> Chlorobenzene 103 97.0 ND 98.4 104.7 100.8 3.8 61-121 20 <br /> 1,1-Dichloroethene 98.3 101 ND 98.4 99.9 105.0 5.0 65-125 20 <br /> Toluene 97.8 92.8 ND 98.4 99.4 96.5 3.0 70-130 20 <br /> Trichloroethene 102 90.8 ND 98.4 103.7 94.4 9.4 74-134 20 <br /> Surrogate(s) <br /> 4-Bromofluorobenzene 494 496 500 98.8 99.1 74-121 <br /> 1,2-Dichloroethane-d4 523 522 500 104.7 104.5 70-121 <br /> Toluene-d8 1487 1492 1 1 500 197.4 198.4 1 181-117 <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 87 of 87 <br />