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(iN Sequoia 680 Chesapeake Drive 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 /> NX Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 92t 9600 FAX (916)921 0100 <br /> Gettler Ryan Geostrategies Client Pro] ID Chevron 9-6171, Stockton Sampled 03/01/98 <br /> 6747 Sierra Court Suite J Sample Descript MW-5 Received 03/02/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 03/04/98 <br /> Attention Deanna Harding Lab Number 9803027-06 Reported 03J12f98 <br /> QC Batch Number MS030498MTBEF3A <br /> Instrument I D F3 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L- <br /> Ethanol 840 N D <br /> t-Butanol 170 N D <br /> Methyl t-Butyl Ether (MTBE) 33 N D <br /> Di-Isopropyl Ether (DIPE) 33 N D <br /> Ethyl t-Butyl Ether (ETBE) 33 N D <br /> t-Amyl Methyl Ether (TAME) 33 N D <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dlchloroethane-d4 76 114 101 <br />• <br /> analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA NALYTICAL - ELAP #1210 <br /> gory <br /> ct Manager Page 70 <br />