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•f , I <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wlget lane Walnut Creek,CA 94598 (925)968-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(9t6)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Gettler Ryan%Geosirategies -Client Proj ID Unocal SS#0123 - - _ _ Sampled 09/28%98 <br /> 6747 Sierr - _ <br /> a Court Suite J Sample Descrlpt U-1 Received 09/28/98 <br /> Dublin, CA 94568 Matrix LIQUID i <br /> Analysis Method EPA 8260 Analyzed 10/02/98 _ <br /> " Attention Deanna Harding - _Lab Number 9809H50-02 Reported 11J10198 <br /> QC Batch Number MS0928988260F3A - <br /> Instrument ID P3 <br /> Methyl t-Butyl Ether (MTBE) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Methyl t-Butyl Ether _ 20 53 <br /> Surrogates Control Limits% % Recovery <br /> 1,2-Dichloroethane-d4 76 114 gg <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> her$�G�jcran <br /> ect Manager <br /> Page 4 <br />