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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX (650)364 9233 <br /> 4D404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510) 988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916) 921 0100 <br /> mGettler Ry anyGeostrategles -Client Proj ID Chevron 9-6171, Stockton - �- Sampled 11/11/97 - <br /> 6747 Sierra Court Suite G Sample Descnpt MW-5 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 9711618-06 _ Reported 11J21/97 - <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 _ 50 -- _ . _ 1500 <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 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 /> TrLfluorotoluene 70 130 92 <br /> knalytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01894 <br /> 9 <br /> jillan'ager Pae 1 t <br /> 9 <br />