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4D <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9640 FAX(415)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(5t0)988 9673 <br /> Analytical 819 Striker Avenue Suite a Sacramento CA 95834 (9 16) 921 9600 FAX(916)921 0100 <br /> Touchstone Developments Client Prod ID Chevron 9-8264 / 8264 Sampled 02/07/96 <br /> 17170 Keaton Ave Sample Descript B-4-6 5 Received 02/09/96 <br /> Sonoma CA 95476 Matrix SOLID Extracted 02/13/96 <br /> Analysis Method EPA 8015 Mod Analyzed 02/15/96 <br /> Attention Tim Walker Lab Number 9602707-13 Reported 02116196 <br /> IC Batch Number GCO213960HBPEXB <br /> istrument ID GCHP4B <br /> Total Extractable Petroleum Hydrocarbons (TEPH) <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TEPH as Diesel 10 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> n-Pentacosane (C25) 50 150 71 <br /> sults quantitated against a diesel standard <br />;alytes reported as N D were not present above the stated limit of detection <br /> EQUOIA ANALYTICAL - FLAP 01210 <br /> av Follett <br /> Manager Page 15 <br /> n� <br />