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Sequoia 680 Chesapeake Dnve Redwood City,CA 94063 (415) 364-96W FAX(415) 364 9233 <br /> i—!D— 404 N Iget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)92t 0100 <br /> Touchstone Developments Client Prof ID Chevron 9-8264/8264-1 Sampled 11/07/95 <br /> 6280 Stoneridge Mall Rd B211 Sample Descript SP-1 (A-D) Comp received 11/08/95 <br /> Pleasanton, CA 94588 Matrix SOLID Extracted 11/08/95 <br /> Analysis Method EPA 8015 Mod Analyzed 11/09/95 <br /> Attention Ann Marie Dockstader Lab Number 9511553-01 _ _ Reported 11J13J95 <br /> QC Batch Number GC1107950HBPEXA _ -- ' - - <br /> Instrument ID GCHP4A <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) 50 150 103 <br /> 0 <br /> Results quantitated against a diesel standard <br /> Anaiytes reported as N a were not present above the stated limit of detection <br /> SEQU IA ANALYTICAL - ELAP 01210 <br /> Mark Cargasacchi <br /> ect Manager Page 3 <br />