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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 /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (9 16) 921 9600 FAX(916)921 0100 <br /> EA Engineering Science &Tech Client Proj iD Exxon 7-3942, 5153942 1300 Sampled 03/03j98- <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descnpt MW11 Received 03/04/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method ERA 8260 Analyzed 03/11/98 <br /> Attention Chrlsta Marting Lab Number 9803306-10 Reported 03131198_ <br />� <br /> C Batch Number MS031198MTBEH6A- _ <br /> nstrument ID H6 <br /> Oxygenate Compounds (EPA 8280) <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 (DIPS) 20 N D <br /> Ethyl t-Butyl Ether (EfBE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limits % % Recovery <br />' 1,2-Dichloroethane-d4 76 114 89 <br /> Analytes reported as N D were not present above the stated ilmlt of detection <br /> IEQUOIA ANAL YT CAL - ELAP #1210 <br /> f"rd Herling <br /> ect Manager Page <br />