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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(5i01 988 9673 <br /> *lam Analytical 819 Stnker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> • <br /> Touchstone Developments Client Prol ID Chevron 9-4183 /9-4183 Sampled 04/10/96 <br /> 781 Kingston Ave Sample Descrlpt T4-E-9 5 Received 04/10/96 <br /> Oakland CA 94611 Matrix SOLID Extracted 04/15/96 <br /> Analysis Method EPA 8015 Mod Analyzed 04/20/96 <br /> Attention Robert Mallory Lab Number 9604850-01 Reported 04124196 <br /> OC Batch Number GC04099E30HBPEXC <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 600 7900 <br /> Chromatogram Pattern C9-C24 Unidentified HC <br /> Surrogates Control Limits% % Recovery <br /> n-Pentacosane (C25) 50 150 Q <br /> 0 <br /> results quantitated against a diesel standard <br /> knalytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /><evin Follett <br /> 3r6t Manager Page 5 <br />