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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 $19Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)92t-0100 <br /> 1455 McDowell Blvd North Ste D t'etaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Gettler Ryan/Geostrategies Client Prol ID Former Unocal #5421 Sampled 04/15/98 <br /> 6747 Sierra Court Suite J Sample Descript UX-4-17 Received 04/16/98 <br /> Dublin, CA 94568 Matrix SOLID E=xtracted 04/16/98 <br /> Analysis Method 8015Mod/8020 Analyzed 04/16/98 <br /> Attention Clyde Galantine Lab Number 9804A07-05 Reported 04/17/98 <br /> QC Batch Number GC041698BTEXEXA <br /> Instrument ID GCHP07 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/K9 <br /> TPPH as Gas 2500 25000 <br /> Methyl t-Butyl Ether 62 170 <br /> Benzene 12 270 <br /> Toluene 12 2200 <br /> Ethyl Benzene 12 530 <br /> Xylenes (Total) 12 2900 <br /> Chromatogram Pattern GAS <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 85 <br /> 4-Bromofluorobenzene 60 140 8 Q <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - FLAP 01210 <br /> gory <br /> ToJl` .e`c`t Manager Page 5 <br />