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Sequoia 680 Chesapeake Dave Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget 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 /> , <br /> i <br /> Gettler Ryan/Geostrategies Client Prod ID Unocal 6981, 7855 22 Sampled 12/08/97 <br /> 3164 Gold Camp Drive #240 Sample Descript VW-1 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 9712694-02 Reported 12/18197 <br /> OC Batch Number MS121497MTBEF3A <br /> Instrument ID F3 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> u L u <br /> 9/ 9/L <br /> Ethanol 500 N D <br /> t-Butanol 100 N D <br /> Methyl t-Butyl Ether (MTBE) 20 N D <br /> Di-Isopropyl Ether (DIPE) 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 95 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> 4 eregory <br /> Project Manager Page 3 <br />