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Sequoia 680 Chesape"ike Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> 404 N Wiget lane Walnut Creek CA 94598 (510)988-9600 FAX(510)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1qW Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 0 <br /> Gettler Ryan/Geostrategies Client Prol ID Unocal 5421, Stockton Sampled 04/16/98 <br /> 6747 Sierra Court Suite J Sample Descnpt US-10 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 9804692-10 Reported 05JO1198 <br /> OC Batch Number SP0424988020EXA <br /> Instrument 1D 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 500 4300 <br /> Methyl t-Butyl Ether 12 N D <br /> Benzene 25 20 <br /> Toluene 2 5 280 <br /> Ethyl Benzene 2 5 100 <br /> Xylenes (Total) 2 5 570 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 2500 O <br /> 4-Bromofluorobenzene 60 140 O <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01271 <br /> i <br /> I <br /> 44ojectVdMa0nayger <br /> Page 11 <br />