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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wlget lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> a- ) <br /> Analytical 819 Sulker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-woo <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> '31GettlerRyan%Geostrategies Client Prof ID Unocal Former Facility#0187 ) Sampled 08/17/998-= <br /> 6747 Sierra Court Suite J Sample Descript U-4 Received 08/17/98 ' <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 08/28/98 <br /> Attention Deanna Harding -05_9808A40-05 _ _ _ Reported 09j20j98_ <br /> Instrument ID HP5 <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 . . . 2.5 34 <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) <br /> 050 <br /> ND <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 75 <br /> , 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1271 <br /> TomcKranicher <br /> Project Manager Page 5 <br />