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Sequoia 680 Chesapeake Redwood G (650) 364 9600 FAX(650) 364-9233 <br /> 404 N Wiget Lainea Walnut Creekk CAA 945984598 (SiD)988 9600 FAX(510)988-9673 <br /> I,D Analytical 819 Straker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-010 0 <br /> ( <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 792 1865 FAX(707) 792-0342 <br /> • <br /> Gettler RyanIGeostrategies Client Proj ID Unocal 5421, Stockton Sampled 04/16/98 <br /> 6747 Sierra Court Suite J Sample Descript US-1 Comp Received 04/17/98 <br /> Dublin, CA 94568 Matrix SOLID Extracted 04/24/98 <br /> Analysis Method 8015Mod/8020 Analyzed 04/24/98 <br /> Attention Clyde Galantine Lab Number 9804B92-01 Reported 05/01/98 <br /> QC Batch Number SP0424988020EXA <br /> Instrument ID GCHPO4 <br /> Total Purgeable Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TPPH as Gas 10 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 70 130 107 <br /> 4-Bromofluorobenzene 60 140 Q <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANAL ICAL - ELAP -01271 <br /> e- r ry <br /> Project Manager Page 2 <br />