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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 /> Analytical 819 Striker Avenue Sulte 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North,Ste D Petaluma,CA 94954 (707)79Z-1865 FAX(707)792-0342 <br /> Gettler RyanZGeostrategies _ Client Prod ID _-Former Unocal Facility #5098 Sampled 09/15/998- <br /> _= 6747 Sierra ourt Suite J Sample Descrlpt MW-14 Received 09/15/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 09/24/98 <br /> Attention Deanna Harding Lab Number 9809909-06 _ _ Reported 09f30198 - <br /> QC Batch Number MS092398MTBEHGA - - - _ -- _ ---- -- - -�� - - - - --_ --- <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 /> 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-Dlchloroethane-d4 76 114 97 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> ;1—ts � <br /> d Granlcher <br /> lect Manager Page 10 <br />