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6�1 Sequoia 680 Chesapeake Dnve Redwood Gty, CA 94063 (650) 364-%00 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> Analytical 819 Stnker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> Gettfer Ryan/Geostrategies- - _ Client Prol ID Unocal SS# 5886 - ry µ Sampled 03/25/98 <br /> 6747 Sierra court Suite J Sample Descript MW-6D Received 03/25/98 <br /> T Dublin, CA 94568 Matrix LIQUID ; <br /> Analysis Method EPA 8260 Analyzed 04/01/98 <br /> Attention Deanna Harding Lab Number 9803G82-09 _ _ Reported 04JO8198 <br /> QC Batch Number MS033198MTBEF3A <br /> Instrument ID F3 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Ethanol 5000 N D <br /> t-Butanol 1000 N D <br /> Methyl t-Butyl Ether (MTBE) 20 1400 <br /> Di-Isopropyl Ether (DIPE) 20 N D <br /> Ethyl t-Butyl Ether (ETRE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limits% % Recovery <br /> 1,2-Dichloroethane-d4 76 114 100 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Wtlwg/(o <br /> rY <br /> Manager Page 23 <br />