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(IN <br /> 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(5 10)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Touchstone Developments - Client Prod ID -Chevron 9-8264/8264-1 Sampled 11/07/95 <br /> 6280 Stoneridge Mall Rd B211 Sample" TB1 Received 11/08/95 <br /> Pleasanton, CA 94588 Matrix SOLID Extracted 11/10/95 <br /> Analysis Method 8015Mod/8020 Analyzed 11/10/95 <br /> Attention Ann Marie Dockstader_ Lab Number 9511587-15 _ Reported 11/16195 <br /> CSC Batch Number GC111095BTEXEXA <br /> Instrument ID GCHP18 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TPPH as Gas 20 86 <br /> Benzene 0 10 32 <br /> Toluene 010 0 54 <br /> Ethyl Benzene 010 1 3 <br /> Xylenes (Total) 0 10 48 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 113 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQU A ANALYTICAL - ELAP #1210 <br /> F <br /> Mark Cargasacchi <br /> Project Manager Page 22 <br />