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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> (1) 404 N Woget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988-9673 <br /> Analytical 819 Stn ker Avenue,Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> Gettler Ryan[Geostrategies Client Prof ID Chevron 9-6171, Stockton - Sampled 03/01/98 <br /> 6747 Sierra Court Suite J Sample Descript MW-7 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 9803027-07 Reported 03j12198 <br /> QC Batch Number MS030298MTBEF3A <br /> Instrument ID F3 <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 51 <br /> Di-Isopropyl Ether (DIPE) 20 N D <br /> Ethyl t-Butyl Ether (El BE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dichloroethane-d4 76 114 103 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> e ory <br /> ect Manager Page 12 <br />