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4D <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 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Touchstone Developments Client Prod ID Chevron 9-2033, 2033-2 Sampled 10/17/96 <br /> P O Box 2554 Sample Descrlpt A14 Received 10/18/96 <br /> Santa Rosa, CA 95405 Matrix SOLID Extracted 10/21/96 <br /> Analysis Method 8015Mod/8020 Analyzed 10/21/96 <br /> Attention Jeff Monroe Lab Number 961OB27-10 Reported 10f22196 <br />)C Batch Number GC102196BTEXEXA <br /> 11strument ID GCHP22 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/Kg nig/Kg <br /> TPPH as Gas 1 0 22 <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 00097 <br /> Chromatogram Pattern <br /> Unidentified HC C9-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 111 <br /> ialytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> e llett <br /> rolect Manager Page 10 <br /> : % <br />