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680 Chesapeake Drive Redwood City CA 94063 (650)364 9600 FAX(650) 364 9233 <br /> Sequoia <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510)988-9600 FAX(510)988-9673 <br /> Analytical 819 Striker 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 /> EA Engineering Science &Tech LClient Prot ID -Exxon 7-3942,-5153942 1300 -~ _ Sampled 05/20/98 <br /> 3468 Mt Diablo Blvd Ste 6100 Sample Descrlpt MW7 Received 05/21/98 <br />' Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 05/24/98 _ <br /> Attention Christa Marting Lab Number_9805E41-06 - _ Reported;06f 10f98 <br /> UC Batch Number MS052498MTBEH6A <br /> nstrument ID 1-16 <br /> Methyl t-Butyl Ether (MTBE) <br />' Analyte Detection Limit Sample Results <br /> ug/L. ug/L <br /> Methyl t-Butyl Ether 20 N D <br />' Surrogates Control Limits % % Recove <br /> 1,2-Dlchloroethane-d4 76 114 104 <br /> 1 <br /> Analytes reported as N❑ were not present above the stated Grit of detection <br /> FEQUOIA ANALYTICAL - ELAP #1210 <br /> rIct <br /> nd Herling <br /> Manager Page 1 t <br />