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Sequoia680 Chesapeake Dnve Redwood City CA 94063 (650) 364 9600 FAX(650)364-9233 <br /> 404 N Wiget Cane Walnut Creels 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/Geostrategles Client Prol ID Unocal SS#0187, 280045 85 µ - - Sampled 03/09/98 <br /> 6747 Sierra Court Suite J Sample Descript U-9 Received 03/09/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 03/12/98 <br /> Attention Deanna Harding Lab Number 9803524-10 Reported 03J18198 <br /> QC Batch Number MS031198MTBEH6B <br /> Instrument ID 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 N D <br /> Di-Isopropyl Ether(DIPS) 20 N D <br /> Ethyl t-Butyl Ether (ETBE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limits% % Recovery <br /> 1,2-Dichloroethane-d4 76 114 92 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA AN LYTICAL - ELAP 41210 <br /> e regory <br /> Project Manager Page g <br />