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' 680 Chesapeake Onve Redwood City CA 94063 (650) 364 9600 FAX(650) 364 9233 <br /> Sequoia <br /> a 1 404 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 /> i <br /> EA Engineering Science &Tech Client Prol ID Exxon 7-3942, 51539 42 1 300 Sampled 11/11/97 <br /> 468 Mt Diablo Blvd Ste 6100 Sample Descript MWS Received 11/12/97 <br /> F-afayette, CA 94549 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 11/21/97 <br /> Attention Chnsta Marting Lab Number 9711732-04 Reported 12J02J97 <br /> C Batch Number MS112197MTBEF3A <br /> strument ID F3 <br /> Oxygenate Compounds (EPA 8260) <br /> tAnalyte Detection Limit Sample Results <br /> ug/L ug/L <br /> REthanol 12500 N D <br /> IF Butanol 2500 N D <br /> Methyl t-Butyl Ether (MTBE) 50 69 <br /> Dl-Isopropyl Ether (DIPS) 50 N D <br /> F-Amyl <br /> thyl t-Butyl Ether (ETRE) 50 N D <br /> Methyl Ether (TAME) 50 N D <br /> Surrogates Control Limits % % Recovery <br />�1,2-Dlchloroethane-d4 76 114 85 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> REQUOIA ANALYTICAL - ELAP 41210 <br /> I T, , Q,� <br /> J Herling <br /> ar ct Manager Page s <br />