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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 (925)988-%W FAX(925)988 9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (9161921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792.1865 FAX(707)792-0342 <br /> » Gettler Ryan/Geostrategies Client Pro) ID Unocal SS#Q123 _ W - - Sampled 09/28/98 <br /> 6747 Sierra Court Suite J Sample Descript TB-LB Received 09/28/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> ' Analysis Method 8015Mod/8020 Analyzed 10/06/98 <br /> Attention Deanna Harding- » _ - Lab Number 9809H50-01 _ - _ Reported 11 J1 OJ98 <br /> QC Batch»Number GC100698BTEX21A - <br /> instrument ID GCHP21 <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 N 0 <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 0 50 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (notal) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br />—Tr4fluorotolupne 70 130 79 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Vro <br /> Granicher <br /> lect Manager Page 1 <br />