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Sequoia 680 Chesapeake Drive Redwood CityCA 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 /> 8195triker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(9l6)92t-0100 <br /> 41)XAnalytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Z. <br /> Gettler Ryan/Geostrategies - --- - Client Prod ID Unocal 0123/1034 Central Ave -Sampled 03/24/98 <br /> 6747 Sierra Court Suite J Sample Descript U-4 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 9803H06-05 _ Reported 04JO9198 <br /> QC Batch Number-MS032898MTBEH6A <br /> Instrument ID H6 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> Lig/L ug/L <br /> Ethanol 620 N D <br /> t-Butanol 120 N D <br /> Methyl t-Butyl Ether (MTBE) 25 N D <br /> Di-Isopropyl Ether(DIPE) 25 N D <br /> Ethyl t-Butyl Ether(ETBE) 25 N D <br /> t-Amyl Methyl Ether(TAME) 25 N D <br /> Surrogates Control Limits% % Recovery <br /> 1,2-Dichloroethane-d4 76 114 86 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Ojet Manager Page 17 <br /> 60% <br />