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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N W18et Lane Walnut Creek CA 94598 (510)988-9600 FAX(510)988-9673 <br /> �I,,�► <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Gettler Ryan/Geostrategies Client Proj ID Unocal 5421, 5421 Sampled 04/16/98 <br /> 6747 Sierra Court Suite J Sample Descrlpt UX-2-25 Received 04/17/98 <br /> Dublin, CA 94568 Matrix SOLID Extracted 04/20/98 <br /> Analysis Method 8015Mod/8020 Analyzed 04/20/98 <br /> Attention Clyde Galantine Lab Number 9804B19-01 Reported 04121198 <br /> QC Batch Number GC042098BTEXEXA <br /> Instrument ID GCHP22 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TPPH as Gas so 15 <br /> Methyl t-Butyl Ether 012 N D <br /> Benzene 0 025 041 <br /> Toluene 0 025 1 4 <br /> Ethyl Benzene 0 025 036 <br /> Xylenes (Total) 0 025 21 <br /> Chromatogram Pattern GAS <br /> Surrogates Control•. Limits % % Recovery <br /> Trifluorotoluene 70 130 95 <br /> 4-Bromofluorobenzene 60 140 210 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> 01 -1- <br /> OWKegory <br /> o)ect Manager <br /> Page 1 <br />