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Sequoia 680 Chesapeake Drove Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wiget lane Walnut Creek CA 94598 (5t0)988-9600 FAX(510)988-9673 <br /> IWO Analytical 819 Striker Avenue Suite 8 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)792-0342 <br /> • <br /> Gettler RyanyGeostrategles Client Prol ID Unocal 5421, Stockton Sampled 04/15/98 <br /> ' 6747 Sierra uourt Suite J Sample Descnpt UT-1-4 Received 04/16/98 <br /> Dublin, CA 94568 Matrix SOLID Extracted 04/16/98 <br /> Analysis Method 8015Mod/8020 Analyzed 04/36/98 <br /> Attention Clyde Galantine Lab Number 9804Al2-02 Reported 04/17J98 <br /> 0C Batch Number GC0416986TEXEXA <br /> Instrument ID GCHP22 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TPPH as Gas 1 0 1 9 <br /> Methyl t-Butyl Ether 0 025 N D <br /> Benzene 00050 0 099 <br /> Toluene 00050 0 047 <br /> Ethyl Benzene 00050 N D <br /> Xylenes (Total) 00050 0 010 <br /> Chromatogram Pattern <br /> Unidentified HC C6-C8 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 125 <br /> 46 Bromofluorobenzene 60 140 77 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> gory <br /> rolect Manager <br /> Page 4 <br /> fid' <br />