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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> ,5) 404 N Weget Lane Walnut Creek, CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Stnker 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 11/11/96 <br />' O Box 2554 Sample Descnpt A47 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 9611596-18 Reported 11 J1 4196 <br /> C Batch Number GC11 1396BTEXEXA <br /> strument ID GCHP18 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/K9 <br /> TPPH as Gas 1 0 52 <br /> Methyl t-Butyl Ether 0 025 N D <br /> Benzene 00050 N D <br /> Toluene 00050 N D <br /> Ethyl Benzene 0 0050 N D <br /> Xylenes (Total) 00050 0 020 <br /> chromatogram Pattern <br /> Unidentified HC C9-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 82 <br /> • <br /> alytes reported as N D were not present above the stated limit of detection <br /> EQUOIA NALYTICAL - ELAP #1210 <br />:vi <br /> Ilett <br /> olect Manager Page 18 <br />