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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 /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> Analytical <br /> ufPbS Services'' ' 016nflPir-o-jec.t- ID" Tosco#5421,7303 Pacific Ave.,Stockton ................ <br /> Sampled Dec 10, 1997- <br /> 2401 Stanwell Dr,, Ste. 300 Sample Descript: Liquid, MW-1 Received: Dec 10, 1997; <br /> Concord, CA 94520 Analysis Method: EPA 8260 Analyzed: Dec 18, 1997; <br /> Attention: Jarrel Crider Lab Number: 712-1025 Reported: Dec 31, 1997.' <br /> OXYG E NATE COMPOUNDS (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> lig/L pg/L <br /> Ethanol.................................... ..................................... 500 ....—......................... N.D. <br /> t-Butanol............................ ............................................... 100 1... ................................ N.D. <br /> Methyl t-Butyl Ether(MTBE)............................................. 2.0 ..................................... N.D. <br /> Di-Isopropyl Ether (DIPE)................................................. 2.0 ........I........................ N.D. <br /> Ethyl t-Butyl Ether (ETBE)................................................. 2.0 ..................................... N.D. <br /> t-Amyl Methyl Ether (TAME)............................................. 2,0 ........ ........................ N.D. <br /> Surrogates Control Limit % % Recovery <br /> 1,2-Dichloroethane-d4...................................................... 76 114..................................... 96 <br /> Analytes reported as N.D.were not present above the stated limit of detection. <br /> SEQUOIA ANALYTICAL, #1210 <br /> (.1,9nature on File <br /> Alan B. Kemp <br /> Project Manager 7121025.MPD <6> <br />