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Sequoia J Chesapeake Dnve Redwood City,CA 94063 50) 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 0100 <br /> i <br /> Gettler Ryan Geostrategies - Client Prol ID - Unocal SS#0187 - - Sampled 02/13/98 - <br /> 6747 Sierra court Suite J Sample Descript U-6 Received 02/17/98 - <br /> Dublin, CA 94568 Matrix LIQUID = <br /> Analysis Method 8015Mod/8020 Analyzed 02/25/98 <br /> Attention Deanna Harding _ Lab Number 9802A45-07 Reported 03102198 r ' <br /> QC Batch Number Gd022598802005A - -- - <br /> Instrument ID GCHP05 <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) N D <br /> Chromatogram 050 Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 82 <br /> analytes reported as N D were not present above the stated limit of detection <br /> 5EO0OIA ANALYTICAL - ELAP #1271 <br /> Z 0/— <br /> 'O�e� <br /> A' ory <br />'rol ct Manager <br /> Page 7 <br /> A7� <br />