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ID <br /> Sequoia 680 Chesapeake Dnve 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 /> X117 Analytical 819 Stnker Avenue Suites Sacramento CA 95834 (916) 921 9600 FAX(916)921 01oo <br /> Touchstone Developments Client Prol ID Chevron 9-2033, 2033-2 Sampled 10/30/96 <br /> P O Box 2554 Sample Descript A27 Received 10/30/96 <br /> Santa Rosa, CA 95405 Matrix SOLID Extracted 10/30/96 <br /> Analysis Method 8015Mod/8020 Analyzed 10/31/96 <br /> Attention Jeff Monroe Lab Number 9610150-11 Reported 10/31/96 <br />)C Batch Number GC103096BTEXEXA <br /> nstrument ID GCHP07 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TPPH as Gas 1 0 1 4 <br /> Methyl t-Butyl Ether 0 025 N D <br /> Benzene 00050 N D <br /> Toluene 00050 N D <br /> Ethyl Benzene 00050 N D <br /> Xylenes (Total) 00050 00060 <br /> Chromatogram Pattern <br /> Unidentified HC C9-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trlfluorotoluene 70 130 101 <br /> 0 <br /> lalytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> e Ilett <br /> roject Manager Page 11 <br />