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Sequoia 680 Chesapeake Dave Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N W�get lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988%73 <br /> 4D- Analytical 819 Stnker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Touchstone Developments Client Prol ID —Chevron 9-8264/8264-1 µ Sampled 11/07/95 <br /> 6280 Stoneridge Mall Rd B211 Sample Descript T-3 Received 11/08/95 <br /> Pleasanton, CA 94588 Matrix SOLID Extracted 11/13/95 <br /> Analysis Method EPA 8015 Mod Analyzed 11/14/95 <br /> Attention Ann Marie Dockstader Lab Number 9511587-09 --- Reported 11 j16195 <br /> QC Batch Number GC1113950HBPEXA - <br /> Instrument ID GCHP5B <br /> Total Extractable Petroleum Hydrocarbons (TEPH) <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TEPH as Diesel 10 13 <br /> Chromatogram Pattern C9-C24 Unidentified HC <br /> Surrogates Control Limits% % Recovery <br /> n-Pentacosane (C25) 50 150 52 <br /> Results quantitated against a diesel standard <br /> Analytes reported as N D were not present above the stated limn of detection <br /> I <br /> SEQUOI NALYTICAL - ELAP #1210 <br /> t <br /> Mark Cargasacchi <br /> ect Manager Page 14 <br />