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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 1900 Bates Avenue Suite L. Concord,CA 94520 (510) 686 9600 FAX(510)686 9689 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Touchstone Development Client Proj ID 6632-2, Chevron 9-8632 Sampled 08/17/94 <br /> P O Box 2554 Sample Descript PX-5 Received 08/18/94 <br /> Santa Rosa, CA 95405 Matrix SOLID Extracted 08/22/94 <br /> Analysis Method 8015Mod/8020 Analyzed 08/22/94 <br /> Attention .Jeff Monroe Lab Number 9408A94-05 Reported 08f25194 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TPPH as Gas 10 11 <br /> Benzene 00050 042 <br /> Toluene 00050 0 040 <br /> Ethyl Benzene 00050 016 <br /> Xylenes (Total) 00050 0 085 <br /> Chromatogram Pattern. Gas + <br /> Discrete Peak C6 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 130 <br /> • <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> V <br /> Oe Tague Clark <br /> Project Manager Page 5 <br />