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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650) 364-9233 <br /> 404 N Wiget Fane Walnut Creek CA 94598 (510)988-9600 FAX(510)988-9673 <br /> �I,�► <br /> Analytical 814 Straker 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" Client Prof ID -Exxon 7-3942,'5153942 1300 Sampled 05/20%98 - <br /> 3488 Mt Dlablo Blvd Ste 6100 Sample Descnpt MW8 r 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, 9805E41-07 _ Reported 06J70/98_ <br />'OC Batch Number-MSO52498M7BEH6A ""- - -- - --- <br /> Instrument ID H6 <br /> Methyl t-Butyl Ether (MTBE) <br />' Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Methyl t-Butyl Ether - 40 43 <br />' Surrogates Control Limits % % Recove <br /> 1,2-Dlchloroethane-d4 76 114 100 <br /> I <br /> I <br /> i <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> PEQUOIA ANALYTICAL - ELAP #1210 <br /> and Herling <br /> ect Manager <br /> Page 13 <br />