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4 <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> ,1) 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(5i0) 988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> i <br /> Touchstone Developments Client Prod ID Chevron 9-2033, 2033-2 Sampled 11/11/96 <br /> P O Box 2554 Sample Descrlpt A49 Received 11/12/96 <br /> Santa Rosa, CA 95405 Matrix SOLID Extracted 11/13/96 <br /> Analysis Method 8015Mod/8020 Analyzed 11/13/96 <br /> Attention Jeff Monroe Lab Number 9611596-20 Reported 1111 4Y96 <br />)C Batch Number GC111396BTEXEXA <br /> istrument 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 N D <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) <br /> 00060 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trlfluorotoluene 70 130 76 <br /> ialytes reported as N D were not present above the stated limit of detection <br />,E000IA ANALYTICAL - ELAP 41210 <br /> ev Ilett <br /> rolect Manager Page 20 <br />