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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 f <br /> 1900 Bates Avenue Suite L Concord CA 94520 (510) 686 9600 FAX(510)686 9689 <br /> ,!D- Analytical 819 Striker Avenue Suite B Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> IWgro West, Inc Client Project ID Shell, 141 N Dorado,Stockton,CA Sampled Oct 4, 1994 <br /> 50 Ei Melody Lane, Ste 160 Sample Matra Air Received Oct 5, 1994 <br /> Roseville, CA 95678 Analysis Method EPA 5030/8015/8020 Reported Oct 11, 1994 <br /> Attention Sudhakar Talanki First Sample # 410-0155 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sampie Sample <br /> Analyte Limit I D. ID I D. <br /> ppmv 410-0155 410-0156 410-0157 <br /> INF @ C-1 EFF C-2 EFF <br /> 1540 HRS 1530 MRS 1520 HRS <br /> Purgeable <br /> Hydrocarbons 1 4 34 16 N D <br /> Benzene 0 016 N D N D N D <br /> Toluene 0 013 0 014 0 037 N D <br /> Ethyl Benzene 0 012 013 021 N D <br /> Total Xylenes 0 012 092 1 9 N D <br /> Chromatogram Pattern C6-C12 C6-C12 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 10 1 0 1 0 <br /> Date Analyzed 10/5/94 10/5/94 10/5/94 <br /> Instrument Identification GCHP-2 GCHP-2 GCHP-2 <br /> Surrogate Recovery, % 92 90 82 <br /> (OC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected at or above the reporting limit <br /> SEQUOIA ANALYTICAL. FLAP #1624 <br /> Linda C Schneider <br /> Project Manager <br /> 4100155 FUG <2> <br />