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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX (650)364 9133 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510) 988 %73 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916) 921 0100 <br /> Gettler RyanZGeostrategies - Client Pro] ID Chevron 9-6171, Stockton - Sampled 11/11/97 <br /> Sierra 6747 SCourt Suite G Sample Descnpt MW-2 Received 11/11/97 <br />." Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 11/20/97 <br /> Attention Deanna Harding Lab Number 9711618-05 Reported 11 j21 j97 <br /> - - <br /> Instrument 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 _ ,, _._ __ 50 __ _ 81 <br /> Methyl t-Butyl Ether 2.5 47 <br /> Benzene 0 50 ND <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 ... ... ... . ... .. .. .. .... CS <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 99 <br /> 10 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1894 <br /> ct Manager Pae 9 <br /> s <br />