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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 /> 8i9 Striker Avenue Suite 8 Sacramento C14 95834 {916}921 9600 FAX(916)921 0100 <br /> Iwo Analytical <br /> 1455 McDowell Slvd North Ste D Periluma, CA 94954 (707) 792 1865 FAX(707, 79Z 0342 <br /> 0 <br /> Delta Environmental Client Prod ID Exxon 7-3708, D093-809 Sampled 06/30/98 <br /> 3164 Gold Camp Drive #200 Sample Descript MW-1 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 9807152-01 Reported 07/13198 <br /> QC Batch Number MS070798MTBEH6A <br /> Instrument 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 40 <br /> Di-Isopropyl Ether (DIPS) 20 N D <br /> Ethyl t-Butyl Ether (ETBE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dichloroethane-d4 76 114 97 <br /> nalytes reported as N D were not present above the stated limit of detection <br />;EQUOIA ANALYTICAL - ELAP #1210 <br /> rd Herling <br /> roject Manager Page 2 <br />