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Il <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 rAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Analytical <br /> I <br /> Gettler Ryan/G eostrategies Client Prol ID Unocal 6981, 7855 22 Sampled 12/08/97 <br /> 3164 Gold Camp Drive #240 Sample Descript MW-7 Received 12/09/97 <br /> Rancho Cordova, CA 95670 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 12/15/97 <br /> Attention Steve Carter Lab Number 9712694-06 Reported 12J18197 <br /> QC Batch Number MS121497MTBEF3A <br /> Instrument ID F3 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/L. ug/L <br /> Ethanol 50G N D <br /> t-Butanol 10G N D <br /> Methyl t-Butyl Ether (MTBE) 20 69 <br /> DI-Isopropyl Ether (DIPE) 20 N D <br /> Ethyl t-Butyl Ether (ETRE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limits% % Recovery <br /> 1,2-Dichloroethane-d4 76 114 95 <br /> • <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA A YTICAL ELAP #1210 <br /> r ry <br /> Project anager Page 11 <br />