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41) Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N WiBet Lane Walnut Creek CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> Iwo Analytical 819 Stnker Avenue,Suitc 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> • <br /> si Gettler Ryan Geostrategies �- µClient Proj ID Unocal SS#5886 ^----- —Sampled 03/25/98 <br /> 6747 Sierra Court Suite J Sample Descript MW-41D Received 03/25/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 03/31/98 <br /> Attention Deanna Harding Lab Number 9803G82-05 _Reported 04f08J98 <br /> QC Batcli 1` udrr er M8033098MTBEF3A <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 17 <br /> Di-Isopropyl Ether DIPS) 20 N D <br /> Ethyl t-Butyl Ether (ETBE) 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 /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> oProt nry <br /> ager Page t i <br />