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680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> a— ) Sequoia 404 N Wiget Cane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792 1865 FAX(707)792-0342 <br /> Gettler"Ryan/Geostrategies -�-' -� Client Pro] ID Unocal SS#5886/2701 W March � Sampled 09/01/98 " <br /> 8747 Sierra Court Suite J Sample Descript MW-4D Received 09/02/98 _ <br /> Dublin, CA 94588 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 09/08/98 - <br /> Attention Deanna Harding Lab Number 9809049-05 Reported 10101198 <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 s0 N D <br /> Methyl t-Butyl Ether 2 5 19 <br /> Benzene 0 50 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Tnfluorotol uene 70 130 97 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1849 <br /> *Granicher <br /> Project Manager <br /> Page 15 <br />