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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 /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Iwo- Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Gettler Ryan Geostrategies�- Client Prol ID Unocal 0123/1034 Central Ave Sampled 03/24/98 - <br /> 6747 Sierra Court Suite J Sample Descript U-4 Received 03/25/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 04/02/98 <br /> Attention Deanna Harding_ Lab Number 9803H06-05_____ _ Reported 04J09/98 <br /> iC Batch Number-GC040298802005A <br />-Istrument ID GCHP05 <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 1000 2100 <br /> Methyl t-Butyl Ether 50 N D <br /> Benzene 10 77 <br /> Toluene 10 N D <br /> Ethyl Benzene 10 180 <br /> Xylenes (Total) 10 - 42 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 76 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1271 <br /> gory <br /> ct Manager Page 19 <br />