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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Iwo Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 %00 FAX(916)921 0100 <br />�Gettler Ryan Geostrategies Client Prol-ID Chevron 9-5171, Stockton - Sampled 11/11/97 <br /> 6747 Sierra�ourt Suite G Sample Descrlpt MW-5 Received 11/11/97 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Attention Deanna HardiAnalysis Method 8015Mod/8020 Analyzed 11/20/97 <br /> ng_ --- -_ Lab Number 9711618-03 _ Reported 11 j21 j97 <br /> - - -- - - <br /> nstrument ID GCHP2 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L. ug/L <br /> TPPH as Gas ...... .. 50750 <br /> Methyl t-Butyl Ether - ---. 25 --- --. .. -- N D <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Unidentified HC ........ .... . ... ..... ..... -- C6-C12 <br /> Discrete Peaks .. ... ---. .. .... ... C6 <br /> Surrogates Control Limits % % Recovery <br /> Trrfluorotoluene 70 130 79 <br />,nalytes reported as N D were not present above the stated limit of detection <br /> 3EQUOIAANA YTICAL - ELAP #1894 <br /> t Manager Page 5 <br />