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Sequoia 680 Chesapeake Drive Redwood Cary CA 94063 650) 364-9600 FAX(650) 364-9233 <br /> 404 N Wlget lane Walnut Creek CA 94598 1925)988-9600 FAX(925?988-9673 <br /> Analytical819 Sutker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(910)921-0100 <br /> 14SS McDowell Blvd North Ste D Petaiuma.CA 94954 (707) 792-1865 FAX(707)79Z-034Z <br /> _ Gettier Ryan/Geostrategies " Client Prol ID Unocal SS#0123 Sampled 09/28/96 <br /> = 6747 Sierra Court Suite J Sample Descript U-1 Received 09/28/98 <br /> - Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 10/07/98 <br /> Attention Deanna Harding " Lab Number 98091-150-02 Reported 11f25[98 _ <br /> QC Batch Number GC100798BTEX174 <br /> Instrument ID GCHP17 <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 .... ... . .._ 150 <br /> .. 50 <br /> Methyl t-Butyl Ether - - - .... 2.5 .. .. 9.0 <br /> Benzene . . .... ..... 0.50 12 <br /> Toluene 050 - N D <br /> Ethyl Benzene .............. ..... 0.50 .......... ......_. 2.1 <br /> Xylenes (Total) . ....• • .... .. 0.50 2.0 <br /> Chromatogram Pattern -- <br /> Gas & Unidentified HC ...... --- - --- .. ... C6-C12 <br /> Surrogates Control Limits% % Recovery <br /> Trrfluorotoluene 70 130 110 <br />*1 <br /> Analytes reported as iN a were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> WeGranicher <br /> ct Manager Page 2 <br />