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! Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wtgec 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 Client Prod ID Exxon 7-3942,5153942 1300 Sampled 05/20/98 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript MW13 Received 05/21/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 05/24/98 <br /> Attention Chnsta Marting. Lab Number 9805E41-12 Reported 06j10198 <br />� <br /> C Batch Number MS052498MTBEH6A <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 20 N D <br /> Surrogates Control Limits % % Recove <br /> 1,2-Dichloroethane-d4 76 114 106 <br /> I <br /> I <br /> 1 <br /> 4nalytes reported as N D were not present above the stated limit of detection <br /> FEQUOIA ANALYTICAL - ELAP #1210 <br /> U 1 <br /> v <br /> and Herling <br /> Pect <br /> Manager <br /> Page 23 <br />