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15) <br /> 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(510) 988 9673 <br /> �,�► Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> Touchstone Developments Client Prol ID Chevron 9-2033, 2033-2 Sampled 10/09/96 <br /> P O Box 2554 Sample Descript OXB1-19 Received 10/10/96 <br /> Santa Rosa, CA 95405 Matrix SOLID Extracted 10/14/96 <br /> Analysis Method 8015Mod/8020 Analyzed 10/15/96 <br /> Attention Jeff Monroe Lab Number 9610708-04 Reported 10118196 <br />)C Batch Number GC1 01 496BTEXEXB <br /> nlstrument ID GCHP07 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/K9 <br /> TPPH as Gas 50 N D <br /> Methyl t-Butyl Ether 012 27 <br /> Benzene 0 025 0 068 <br /> Toluene 0 025 N D <br /> Ethyl Benzene 0 025 N D <br /> Xylenes (Total) 0 025 0 034 <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trlfluorotoluene 70 130 109 <br /> 0 <br /> nalytes reported as N D were not present above the stated limit of detection <br />;EQUOIA ANALYTICAL - ELAP #1210 <br /> ollett <br />'roject Manager Page 5 <br />