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Sequoia 680 Chesapeake Di 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 /> a- ) Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (9l6)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br />• <br /> Gettler RyanlGeostrategies Client Prol ID Unocal 5421, Stockton Sampled 04/16/98 <br /> 6747 Sierra Court Suite J Sample Descript US-5 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 9804692-05 Reported 05101198 <br /> OC Batch Number SP0424988020EXX <br /> Instrument ID GCHPO4 <br /> Total Purgeable Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/Kg 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 /> Trifluorotoluene 70 130 100 <br /> 4-Bromofluorobenzene 60 140 Q <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANA YTICAL - ELAP #1271 <br /> ory <br /> olect Manager Page 6 <br /> fid' <br />