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., <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget Cane Walnut Creekk,CA 44598 (510)988-9600 FAX(510)968-9673 <br /> 819 Strsker Avenue,Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> fwr� Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br />µGettler Ryan/Geostrategies- ClientProl ID Unocal 0123/1034 Central Ave Sampled 03/24/98 -` <br /> 6747 Sierra Court Suite J Sample Descnpt U-3 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 9803H06-04_ _ Reported 04j09j98 <br /> QC Batch Number MS032898MTBEH6A <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(DIPE) 20 N D <br /> Ethyl t-Butyl Ether (ETBE) 20 N D <br /> t-Amy! Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dlchloroethane-d4 76 114 92 <br /> i <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 41210 <br /> �zzll� <br /> 0 <br /> roject Manager _ Page 13 <br />