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Sequoia 680 Chesapeake Drive Rcdwood City CA 94063 (4151 304 9600 FAX(415) 364 9233 <br /> 404 N Wigct lane Walnut Creek CA 94599 {510) 994 9600 FAX(510)989 9673 <br /> Analytical 819 Striker Avenue Su to 9 Sacramento CA 95814 {916} 911 9600 FAX(1)16)921 0100 <br /> Environmental Resolutions Client Prod ID Unocal 5886 205503 Sampled 04/15/97 <br /> 74 Digital Drive Suite 6 Sample Descript S-105-B7 Received 04/18/97 <br /> Novato CA 94949 Matrix SOLID Extracted 05/02/97 <br /> Analysis Method 8015Mod/8020 Analyzed 05/02/97 <br /> Attention Keith Romstad Lab Number 9704G03 04 Reported 05/05/97 <br /> QC Batch Number GC050297STEXEXA <br /> Instrument ID GCHP07 <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 1 0 N D <br /> Methyl t Butyl Ether 0 025 N D <br /> Benzene 00050 N D <br /> Toluene 00050 N D <br /> Ethyl Benzene 00050 N D <br /> Xylenes (Total) 00050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trlfluorotoluene 70 130 87 <br /> 4 Bromofluorobenzene 60 140 gg <br /> I <br /> I <br /> 4nalyes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> vinFollett <br /> ole <br /> olect Manager <br /> Page <br />