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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 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 /> '10 <br /> Touchstone Developments Client Prol ID Chevron 9-2033, 2033-2 Sampled 10/30/96 <br /> P O Box 2554 Sample Descript A22 Received 10/30/96 <br /> Santa Rosa, CA 95405 Matrix SOLID Extracted 10/30/96 <br /> Analysis Method 8015Mod/8020 Analyzed 10/30/96 <br /> Attention Jeff Monroe Lab Number 9610150-06 Reported 10131196 <br />-C Batch Number GC103096BTEXEXA <br /> istrument 1D GCHP06 <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 69 <br /> Methyl t-Butyl Ether 0 025 N D <br /> Benzene 00050 N D <br /> toluene 00050 N D <br /> Ethyl Benzene 00050 0 016 <br /> Xylenes (Total) 00050 0 036 <br /> Chromatogram Pattern <br /> Unidentified HC C8-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 88 <br /> i <br /> ialytes reported as N 0 were not present above the stated limit of detection <br /> E0001A ANALYTICAL - ELAP #1210 <br /> av Ilett <br /> olect Manager Page 6 <br />