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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): 355013/8270C Test(s):8270C <br /> Matrix Spike(MS/MSD) Soil QC Batch#2003/11/20-01.11 <br /> GMX-23-1.0 >> MS Lab ID: 2003-11-0639-017 <br /> MS: 2003/11/20-01.11-005 Extracted: 11/20/2003 Analyzed: 11/21/2003 11:55 <br /> Dilution: 1.00 <br /> MSD: 2003/11/20-01.11-006 Extracted: 11/20/2003 Analyzed: 11/21/2003 12:23 <br /> Dilution: 1.00 <br /> Compound Conic. mg/Kg Spk.Level Recovery% Limits% Flags <br /> MS MSD Sample mg/Kg MS MSD RPD Rec. RPD MS MSD <br /> Acenaphthene 0.740 0.620 ND 0.996 74.3 62.1 17.9 49-102 30 <br /> Pyrene 0.810 0.690 ND 0.996 81.3 69.1 16.2 25-117 35 <br /> Surrogate(s) <br /> Nitrobenzene-d5 14.4 11.7 25 57.7 46.9 23-120 <br /> 2-Fluorobiphenyl 17.6 14.3 25 70.5 57.1 30-115 <br /> p-Terphenyl-d14 17.5 1 14.9 1 1 25 170.1 159.5 1 1 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 29 of 30 <br />