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• Sequoia 10 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 %73 <br /> Analytical 819 Sinker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Gettler Ryan/Geostrategies Client Prol ID Unocal SS#0187 Sampled 02/13/98 <br /> 6747 Sierra Court Suite J Sample Descnpt U-3 Received 02/17/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 02/25/98 _ <br /> Attention Deanna Harding Lab Number 9802A45-04 Reported 03J02198 _ <br /> QC Batch Number GCO22598802005A <br /> Instrument 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 10000 41000 <br /> Methyl t-Butyl Ether 500 N D <br /> Benzene 100 1700 <br /> Toluene 100 820 <br /> Ethyl Benzene 100 1900 <br /> Xylenes (Total) .. 100 6300 <br /> Chromatogram Pattern .. .. Gas <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 79 <br /> • <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA AN YTICAI - ELAP #1271 <br /> gory <br /> Prof t Manager Page 4 <br />