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Sequoia 680 Chesapeake Dnvc Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 NI eget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988 9673 <br /> Via- V Analytical 819 Stnker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> i <br /> ii <br /> Gettler Ryan�Geostrategies-" -- -ZZ- Client Proj ID' Unocal SS# 5886 Sampled 03/25/9$- -' <br /> 6747 Sierra curt Suite J Sample Descript MW-4S Received 03/25/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> ' Analysis Method EPA 8260 Analyzed 03/31/98 <br /> l Attention Deanna Harding Lab Number 9803G82-06 Reported 04f08198 " <br /> CC Batch Number MS033198MTBEF3A - <br /> Instrument ID P3 <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) 2 0 72 <br /> Di-Isopropyl Ether (D1PE) 20 N D <br /> Ethyl t-Butyl Ether (ETBE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 2 0 N D <br /> Surrogates Control Limits% % Recovery <br /> 1,2-Dichloroethane-d4 76 114 103 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA AN LYTICAL - ELAP #1210 <br /> gory <br /> Project Manager Page 14 <br />