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STLSubmission#: 2003-11-0639 <br /> PNA analysis by 8270C <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: 11/18/2003 17:50 <br /> Tracy Gravel Pits <br /> Site: 26805 South MacArthur Dr,Tracy,CA,95576 <br /> Batch QC Report <br /> Prep(s): 3550B/8270C Test(s): 8270C <br /> Laboratory Control Spike Soil QC Batch#2003/11/22-02.11 <br /> LCS 2003/11/22-02.11-002 Extracted: 11/22/2003 Analyzed: 11/24/200314:40 <br /> LCSD 2003/11/22-02.11-003 Extracted: 11/22/2003 Analyzed: 11/24/200315:08 <br /> Compound Conic. mg/Kg Exp.Conc. Recovery% RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Acenaphthene 0.820 0.730 0.996 82.3 73.3 11.6 49-102 30 <br /> Pyrene 0.830 0.770 0.996 83.3 77.3 7.5 25-117 35 <br /> Surrogates(s) <br /> Nitrobenzene-d5 15.3 14.4 25 61.2 57.6 23-120 <br /> 2-Fluorobiphenyl 19.2 17.0 25 76.8 68.0 30-115 <br /> p-Terphenyl-d14 19.7 17.7 25 78.8 70.8 18-137 <br /> Severn Trent Laboratories, Inc. 11/25/2003 15:02 <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 28 of 30 <br />