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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(9Z5)988-9673 <br /> Analytical 819 5trlker 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 /> ettter-Ryan''Dublin Client Protect 10' Unocal 88#5098, Stockton Sampled ' `bec 22, 1998 <br /> 6747 Sierra Court, Suite J Sample Descript Water, MW-12 Received Dec 23, 1998 <br /> Dublin, CA 94568 Analysis Method EPA 8260 Analyzed Jan 5, 1999 <br /> Attention Deanna Harding Lab Number 812-2067 Reported Jan 13, 1999 , <br /> 1 u . o r vv n nv 4...,. ♦ h* , r u ♦ uv s r .. r. t . i <br /> OXYGENATED COMPOUNDS (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> N9/L N9/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 (DIPS) 20 N D <br /> Ethyl t-Butyl Ether (EfBE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limit % % Recovery <br /> 1,2-Dlchloroethane-d4 50 150 102 <br /> Analytes reported as N D were not present above the stated isnot of detection <br /> SEQUOIA ANALYTICAL, #1271 <br /> e Fegley <br /> v Project Manager <br /> 8122064 GEr <7> <br />