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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 IAX(415) 364 9233 <br /> 404 N Wigct l-anc Walnut Creek,CA 94598 (510) 988 9600 1 AX (510)988 9673 <br /> Analytical <br /> 819 Striker Avcnuc,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> ii Gettler Ryan[Geostrategies Client Pro) ID Chevron 9-1918, Stockton Sampled 04/16/97 <br /> 6747 Sierra Court Suite G Sample Descript SP-(A,B,C,D) Comp Received 04/17/97 <br /> Dublin, CA 94568 Matrix SOLID Extracted 04/18/97 <br /> Analysis Method 8015Mod/8020 Analyzed 04/18/97 <br /> Attention Barbara Sieminski Lab Number 9704942-01 deported 04/21197 <br /> I i i i 1 <br /> i ti li <br /> QC Batch Number 6C041897BTEXEXA - <br /> Instrument ID GCHP07 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TPPH as Gas 10 N D <br /> Benzene 00050 N D <br /> Toluene 00050 N D <br /> Ethyl Benzene 00050 N D <br /> Xylenes (Total) 00050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trlfluorotoluene 70 130 91 <br /> 4-Bromofl uoro benzene 60 140 90 <br /> I <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Migory <br /> Prol Manager Page t <br />