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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek,C4 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 9-2033, 2033-2 Sampled 10/30/96 <br /> P O Box 2554 Sample Descript A20 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 9610150-04 Reported 10j31J96 <br />)C Batch Number GC103096BTEXEXA <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 74 <br /> Methyl t-Butyl Ether 0 025 0 028 <br /> Benzene 00050 N D <br /> Toluene 00050 N D <br /> Ethyl Benzene 00050 0 010 <br /> Xylenes (Total) 00050 0 014 <br /> Chromatogram Pattern <br /> Unidentified HC C9-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 97 <br /> i <br /> ialytes reported as N fl were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> e Ilett <br /> rolect Manager Page 4 <br />