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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 404 N Wiget Lane <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Gettler Ryan[Geostrategies - Client Prof ID UNOCAL 2859, Stockton — �-Sampled 06/18/98 <br /> 6747 Sierra Court Suite J Sample Descnpt- MW-6 Received 06/18/98 <br />' Dublin, CA 94568 Matrix LIQUID = <br /> Analysis Method 8015Mod/8020 Analyzed 06/28/98 <br /> Attention Deanna Harding Lab Number 9806C90-07 _ - _ Reported 07/10198 <br /> :7— <br /> OC Batch Number GC062898802002A <br /> Instrument ID HP-2 <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 N D <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 /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 107 <br /> 0 <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1271 <br /> T anicher <br /> Pro ct Manager Page 4 <br />