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5� <br /> Sequoia 680 Chesapeake Drive 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 Sinker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921-0100 <br /> Gettler Ryan/Geostrategies Client Pro' IDµµ" Unocal SS#58$6 w_ -- "" - " " - - ~M <br /> 1 Sampled"03/25/98 <br /> 6747 Sierra Court Suite.J! Sample Descnpt MW-1 Received 03/25/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 03/30/98 <br /> Attention_Deanna Harding _ Lab Number 9803G82-02 _ Reported o4Jo8198 <br /> QC Batch Number MS032898MTBEH6A <br /> Instrument 1D H6 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Ethanol 500 N D <br /> t-Butanol 100 N D <br /> Methyl t-Butyl Ether (MTBE) 20 69 <br /> Di-Isopropyl Ether (DIPS) 2 0 N D <br /> Ethyl t-Butyl Ether (ETRE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limits% % Recovery <br /> 1,2-Dichloroethane-d4 76 114 $9 <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 41210 <br /> oryroleREnager Page 2 <br />