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r <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 (925)988-9600 FAX(925)988-9673 <br /> 1%p Analytical 819 Stoker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792 1865 FAX(707)792-0342 <br /> Gettler Ryan/Geostrat egies --__Client Prof-ID - Unocal 5886, 180137 85- Sampled 06/17/98 <br /> 3 6747 Sierra Court Suite J Sample Descript MW-613 Received 06/17/98 <br /> 3 Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 06/27/98 -_ <br /> -. Attention DeannaHarding - Lab Number 9806C26-09 _ Reported 07109198 <br /> QC Batch Number MS062798826052A <br /> Instrument ID MS-2 <br /> Fuel Oxygenates by 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) 20 330 <br /> D1-Isopropyl Ether (DIPE) 20 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-Dichlorcethane-d4 76 114 94 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1271 <br /> T ranicher <br /> 1WGt Manager Page 23 <br />