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Sequoia 680 Chesapeake Dnve 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 /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 010O <br /> Gettler Ryan1Geosirategies - Client Prof ID Chevron 9-6171, Stockton - Sampled 11/11/97 <br /> 6747 Sierra Court Suite G Sample Descnpt MW-4 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 9711618-07 Reported 11121197_ <br /> istrument 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 50 160 <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) 0 50 N D <br /> Chromatogram Pattern <br /> Unidentified HC .. .._ .. ... .. ... ... ... . C6-C12 <br /> Discrete Peaks .._ . . ... ... ... ... ... . C6 <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 109 <br /> nalytes reported as N 0 were not present above the stated limit of detection <br />;EQUOIA ANAL ICAL - ELAP #1894 <br /> r <br /> 't Manager Page 13 <br />