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' r - Sequoia 680 Chcsapcakc Drive Redwocd City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N W,get lane Walnut Creek CA 94598 (510) 988 9600 FAX (5(0) 938 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> EA Engineering Science &Tech - -Client Proj ID Exxon 7-3942, 5153942 1300 Sampled 03/03/98 <br /> 134611 Mt Diablo Blvd Ste B100 Sample Descript MW13 Received 03/04/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 03/11/9B <br /> Attention Chnsta Marting -- Lab Number 9803306-12 _ Reported 03J31 f98 <br />�C Batch Number MS031198MTBEH6A - ~ <br /> strument ID H6 <br /> Oxygenate Compounds (EPA 8260) <br />'Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Ethanol 500 N D <br /> Butanol 100 N D <br /> IM- <br /> ethyl t-Butyl Ether(MTBE) 20 N D <br /> DI-Isopropyl Ether(DIPE) 20 N D <br /> Ethyl t-Butyl Ether(ETBE) 20 N D <br /> I-Amyl Methyl Ether(TAME) 20 N D <br /> Surrogates Control Limits % % Recovery <br /> I1,2-Dichloroethane-d4 76 114 87 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> QUOIA ANALYTICAL - ELAP #1210 <br /> "I JRV <br /> rtd <br /> Herling <br /> Manager Page 5 <br />