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Sequoia 630 Chesapeake Drive Redwc-ad City CA 94063 (4 15) 364 9600 FAX(4 15) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 933 9600 FAX(510) 938 9673 <br /> Analytical 819 Striker Avenue Suite Sacramento CA 95834 (916) 9219600 FAX(916) 921 0100 <br /> Environmental Resolutions Client Prol ID Unocal 5886 205503 Sampled 04/15/97 <br /> 74 Digital Drive Suite 6 Sample Descrlpt S 5 5 B4 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 01 Reported 05/051197 <br /> 00 Batch Number GCO50297BTEXEXA <br /> Instrument 10 GCHP07 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> M9/Kg mg/Kg <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 /> Trifluorotoluene 70 130 91 <br /> 4 Bromofluorobenzene 60 140 81 <br /> n <br /> MAY 6 1997 <br /> t <br /> ^alytes reported as N D � ere not present above the stated 1=t of detection <br /> ;EQUOIA ANALYTICAL - EL-AP #1210 <br /> in Follett <br /> lect Manager <br /> Page 1 <br />