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4D <br /> Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wigct Lane Walnut Creek,CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> Analytical 819 Striker Avenue,Ste 8 Sacramento,CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> Touchstone Developments Client Proi ID Chevron 9-8264/8264-1 µ"»«»~ Sampled 11/07/95 <br /> 6280 Stoneridge Mali Rd 8211 Sample Descript TB1 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 9511587-15 Reported 11J16J95 ; <br /> OC Batch Number GC1113950HBPEXA <br /> Instrument ID GCHPSA <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 83 <br /> Results quantitated against a diesel standard <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQU ANALYTICAL - ELAP #1210 <br /> t <br /> Mark Cargasacchi <br /> orct Manager Page 23 <br />