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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N W,get Lane Walnut Creek CA 94598 (510)988-9600 FAX(510)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX 916921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 707 792-1865 FAX(707)792-0342 <br /> Gettler Ryan/Geostrategies Client Prol ID Unocal 5421, Stockton Sampled 04/15/98 <br /> 6747 Sierra Court Suite J Sample Descript UT-4-6 Received 04/16/98 <br /> Dublin, CA 94568 Matrix SOLID Extracted 04/16/98 <br /> Analysis Method 8015Mod/8020 Analyzed 04/16/98 <br /> Attention Clyde Galantine Lab Number 9804Al2-05 Reported 04117198 <br /> QC Batch Number GC04169813TEXEXA <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 /> 7PPH as Gas 1 0 N D <br /> Methyl t-Butyl Ether 0 025 N D <br /> Benzene 00050 N D <br /> Toluene 00050 00053 <br /> Ethyl Benzene 00050 N D <br /> Xylenes (Total) N D <br /> Chromatogram 00050 Pattern <br /> Surrogates Control Limits% % Recovery <br /> Trlfluorotoluene 70 130 88 <br /> 4-Bromofluorobenzene 60 140 99 <br /> • <br /> Analytes reported as N D were not present above the stated limtt of detection <br /> SEQUOIA,ANALYTICAL - ELAP #1210 <br /> qwdregory <br /> Project Manager Page 7 <br />