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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 1 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> Analytical 819 Straker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Touchstone Developments Client Prol ID Chevron 9-8264 /9-8264 Sampled 02/06/96 <br /> 17170 Keaton Ave Sample Descript MW-2-5 0 Received 020996 <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 9602708-15 Reported 02f23196 <br />)C Batch Number GCO213960HBPEXB <br /> istrument ID GCHP4B <br /> Total Extractable Petroleum Hydrocarbons (TEPH) <br /> Analyte Detection Limit Sample Results <br /> mg/K9 mg/Kg <br /> TEPH as Diesel 1 0 11 <br /> Chromatogram Pattern C9-C24 Unidentified HC <br /> Surrogates Control Limits % % Recovery <br /> n-Pentacosane (C25) 50 150 55 <br /> suits quantitated against a diesel standard <br /> lalytes reported as N D were not present above the stated limit of detection <br /> EQUOIA ANALYTICAL - ELAP 41210 <br /> Follett <br /> Manager Page 16 <br />