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4D 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 Prol ID Chevron 9-8264 /8264 Sampled 02/07/96 <br /> 17170 Keaton Ave Sample Descrlpt MW-3-11 5 Received 02/09/96 <br /> Sonoma CA 95476 Matrix SOLID Extracted 02/13/96 <br /> Analysis Method 8015Mod/8020 Analyzed 02/14/96 <br /> Attention Tim Walker Lab Number 9602707-07 Reported 02J16196 <br />)C Batch Number GCO21396BTEXEXB <br /> nstrument ID GCHP18 <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 10 N D <br /> Methyl t-Butyl Ether 0 025 0 080 <br /> Benzene 00050 N D <br /> Toluene 00050 N D <br /> Ethyl Benzene 00050 N D <br /> Xylenes (Total) 00050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 95 <br /> 0 <br /> nalytes reported as N D were not present above the stated limit of detection <br />;EQUOIA ANALYTICAL - ELAP #1210 <br /> evin Follett <br /> at Manager Page 8 <br />