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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 Sutker Avenue,Suite a Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)79Z-0342 <br /> Gettler Ryan`Geostrategies Client Prol ID Chevron 9-6171, Stockton Sampled 00/11/98 <br /> 6747 Sierra Court Suite J Sample Descript: MW-4 Received 05/11/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method. 8015Mod/8020 Analyzed 05/15/98 <br /> Attention Deanna Harding_ _ Lab Number 9805584-06 _-� _ -_ ReDorted_06/02/98 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 50 770 <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xyienes (Total) 050 N D <br /> Chromatogram Pattern <br /> Unidentified HC - C6-C12 <br /> Surrogates Control Limits % % Recovery <br /> 1uorotoiuene 70 130 107 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA A ALYTICAL - ELAP #1849 <br /> I e gory <br /> Project Manager Page B <br />