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r <br /> Sequoia <br /> Chesapeake Drive Redwood City CA 94063 (650)364-%00 FAX(650)364-9233 <br /> Se1 uoia 404 N Wiget Lane Walnut Creek.CA 94598 (9Z5)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)9ZI-9600 FAX(916)9ZI-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 7 Gettler RyanIGeostrategies"�- " Client Prol ID " Tosco SS#6981, 180138 85 Sampled 05/27/98 = <br /> __, 6747 Sierra Court Suite J Sample Descript MW-5 Received 05/28/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> " Analysis Method 8015Mod/8020 Analyzed 06/04/98 ' <br /> Attention Deanna Harding Lab Number _9805H47-05 Reported 07J24198 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 50 N D <br /> Methyl t-Butyl Ether 25 81 <br /> Benzene 0 50 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (rotal) 0 50 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trlfluorotoluene 70 130 100 <br /> i <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 41849 <br /> 3,, <br /> ranicher ~ <br /> ct Manager Page 9 <br />