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Sequoia 680 Chesapeake Drive Redwood City CA 94063' (650) 364.9600 FAX(650)364-9233 <br /> 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 /> 'PDS Services Client PfOJECt 1D: Tosca#5421,7303 Pacific Ave.,Stockton Sampled- Dec 10, 1997.; <br /> 2401 Stanwell Dr., Ste. 300 Sample Descript: Liquid, MW-4 Received: Dec 10, 1997`;: <br /> Concord, CA 94520 Analysis Method: EPA 8260 Analyzed: Dec 18, 1997". <br /> Attention: Jarre!Crider Lab Number: 712-1028 Reported: Dec 31, 19971;; <br /> OXYGENATE COMPOUNDS (EPA 8260) <br /> k <br /> Analyte Detection Limit Sample Results <br /> Ng/L lig/L <br /> Ethanol.............................................................................. 500 ..................................... N.D. <br /> t-Butanol............................................................................ 100 ..................................... N.D. <br /> ................ <br /> Methyl t-Butyl Ether(MTBE)............................................. 2.0 ..................................... N.D. <br /> Di-Isopropyl Ether(DIPE)................................................. 2:0 ..................................... N.D. <br /> Ethyl t-Butyl Ether (ETBE)................................................. 2.0 ...................................... N.D. <br /> t-Amyl Methyl Ether (TAME)............................................. 2.0 ..................................... N.D. <br /> I <br /> � o a <br /> /o <br /> Surrogates Control Limit /o Recovery <br /> 1,2-Dichloroethane-d4...................................................... 76 114..................................... 93 <br /> Analytes reported as N.D,were not present above the stated limit of detection. <br /> SEQUOIA ANALYTICAL, #1210 <br /> signature on File <br /> Alan B. Kemp <br /> Project Manager <br /> 7121025.MPD <9> <br />