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Sequoia J Chesapeake Dnve Redwood Cry,CA 94063 50) 364-9600 FAX(650)364-9233 <br /> 404 N Wiget lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytiea 819 Stnker 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 Descrlpt U-4 Received 02/17/98 <br /> Dublin, CA 94,568 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 02/25/98 <br /> Attention Deanna Harding Lab Number 9802A45-05 _ Reported 03102/98 <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 50 95 <br /> Methyl t-Butyl Ether 25 13 <br /> Benzene 0 50 1 3 <br /> Toluene 0 50 43 <br /> Ethyl Benzene 0 50 0 60 <br /> Xylenes (Total) 0.50 3.8 <br /> Chromatogram Pattern <br /> Gas & Unidentified HC <C7 <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 86 <br /> • <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUVegory <br /> AL - ELAP #1271 <br /> r le <br /> Manager <br /> Page 5 <br />