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680 Chesapeake Drive Redwood City CA 94063 (650)364-%W FAX(650)364-9233 <br /> • Sequoia 404 N Wlget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)9W9673 <br /> 819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 865 FAX(707)792-0342 <br /> Analytical 1551 Industrial 1455 ollRoad North Ste D SanCarlos CAma CA 94954 (707)94070-4111 (650)32-19600 FAX(650)232-9612 <br /> � y <br /> lronmental Resolutions Client Project 1D SRI 205504T7/Tosco#5886 Sampled <br /> May 10, 1999 <br /> 10, i 999 <br /> WDigital Dr, Ste 100 Sample Descri d Water, W-6-MW2 Analyzed May 14, 1999 <br /> Novato, CA 94949 Analysis Method EPA 8260 Reported May 21, 1999 <br /> Attention Keith Romstad Lab Number 905-0544 p <br /> QC Batch Number MS0512998260S2A <br /> Instrument ID GC/MS-2 MTBE by EPA 8260 <br /> Analyte Detection Lima Sample Results <br /> Ng/L Ng/L <br /> Methyl t-Butyl Ether (MTBE) 100 8,100 <br /> Surrogates Control Limit% % Recovery <br /> Dibrornofluoromethane 50 150 110 <br /> s <br /> Analytes reported as N 0 were not present above the stated limit of detection Because matrix effects and/or other factors <br /> required additional sample dilution,detection limas for this sample have been raised <br /> SEQUOIA ANALYTICAL, #1271 <br /> p <br /> Laborat ry Dir for <br /> 9050543 ENR <4> <br />