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Sequoia 404 Chesapeake Drive Redwood Cary CA 94063 (650) 364 9600 FAX(650) 364 9633 <br /> 404 N Wfget Lane Walnut Creek CA 94598 (965)988 9600 FAX(925)988 9673 <br /> ,!D— Analytiea 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(7071 792 0342 <br /> 40 <br /> Delta Environmental Client Prat 1D Exxon 7-3708, D093-809 Sampled 06/30/98 <br /> 3164 Gold Camp Drive, #200 Sample Descript MW-4 Received 07/01/98 <br /> Rancho Cordova CA 95670 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 07/08/98 <br /> Attention Jim Brownell Lab Number 9807152-04 Reported 07/13/98 <br />)C Batch Number MS070798MTBEH6A <br /> istrument 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 3 5 <br /> DI-Isopropyl Ether (DIPE) 2 0 N D <br /> Ethyl t-Butyl Ether (ETBE) 2 0 N D <br /> t-Amyl Methyl Ether (TAME) 2 0 N D <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dichloroethane-d4 76 114 95 <br /> a <br /> Ialytes reported as N l7 were not present above the stated limit of detection <br /> EQUOIA ANALYTICAL - ELAP #1210 <br /> ii and Herling <br /> roject Manager Page 8 <br />