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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> 404 N W,get Lane Walnut Creek CA 94598 (510)988-9600 FAX(510)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)911-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> • <br /> Gettler Ryan/Geostrategies Client Prol ID Unocal 5421, Stockton Sampled 04/15/98 <br /> 6747 Sierra Court Suite J Sample Descript UT-3-5 Received 04/16/98 <br /> Dublin, CA 94568 Matrix SOLID Extracted 04/16/98 <br /> Analysis Method 8015Mod/8020 Analyzed 04/16/98 <br /> Attention Clyde Galantine Lab Number 9804Al2-04 Reported 04117/98 <br /> QC Batch Number GC041698BTEXEXA <br /> Instrument ID GCHP22 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/K9 mg/K9 <br /> TPPH as Gas 10 1 3 <br /> Methyl t-Butyl Ether 0 025 N D <br /> Benzene 00050 0029 <br /> Toluene 00050 0 050 <br /> Ethyl Benzene 00050 00093 <br /> Xylenes (Total) 00050 0 051 <br /> Chromatogram Pattern GAS <br /> Surrogates Control Limits % % Recovery <br /> Tnfluorotoluene 70 130 100 <br /> 4-Bromofluorobenzene 60 140 89 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEOUOI A ALYTICAL - ELAP #1210 <br /> e gory <br /> Project Manager page 6 <br />