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' Sequoia 680 Ch—peak,Dnve Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wigct Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> �rIl11 Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> EA Engineering Science &Tech Client-Prof ID - Exxon 7-3942, 5153942 1300 Sampled 03/03/9-8- <br /> 3468 Mt Diablo Blvd Ste 6100 Sample Descript MW13 Received 03/04/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 03/16/98 <br /> Attention Christa Marting Lab Number 9803306-12 Resorted_03f31 f98 - <br />�C Batch Number GC031698BTEX2IA <br /> istrument lD GCHP27 - <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 N D <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> lSurrogates Control Limits % % Recove <br /> Trdluorotoluene 70 130 98 <br /> r <br /> r <br /> 1 <br /> r <br /> r <br /> Analytes reported as N D were not present above the stated limit of detection <br /> OEQUOIA ANALYTICAL - ELAP #1210 <br /> erderling <br /> ct Manager Page 6 <br /> 1 <br />