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• Sequoia 680 Chesapeake Dnve Redwood Gry,CA 940L (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988-9600 FAX(510)988 %73 <br /> �rill� Analytical 819 Stnker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Gettler Ryan/Geostrategies Client Prol ID Unocal SS#0187, 280045 85 Sampled 03/09/98 <br /> 6747 Sierra Court Suite J Sample Descnpt U-2 Received 03/09/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 03/12/98 <br /> Attention Deanna Harding Lab Number 9803523-03 Reported 03J1 81:98 <br /> QC Batch Number MS031198MTBEH6B <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 N D <br /> Di-Isopropyl Ether (D1PE) 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 85 <br /> Analytes reported as N D were not present above the stated hmlt of detection <br /> SEQUOIA ALYTICAL - ELAP #1210 <br /> gory <br /> Project Manager Page 7 <br />