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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 Stnker Avenue,Suite a Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Touchstone Developments Client Proj ID Chevron 9-2033, 2033-2 Sampled 10/30/96 <br /> P O Box 2554 Sample Descrlpt A23 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 9610150-07 Reported 1OJ31196 <br /> DC Batch Number GC103096BTEXEXA <br /> nstrument ID 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 10 34 <br /> Methyl t-Butyl Ether 0 025 N D <br /> Benzene 00050 N D <br /> Toluene 00050 N D <br /> Ethyl Benzene 00050 00052 <br /> Xylenes (Total) 00050 0 016 <br /> Chromatogram Pattern <br /> Unidentified HC C9-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 85 <br /> 140 <br /> analytes reported as N D were not present above the stated limit of detection <br /> 3E000I , ANALYTICAL - ELAP 01210 <br /> e ollett <br /> Irolect Manager Page 7 <br />