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' 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707) 792-1865 FAX(707)792-0342 <br /> is - <br /> EA Engineering Science &Tech Client Prol ID Exxon 7-0137,75150137 1300 Sampled 10/14/98 = <br /> 3468 Mt Diablo Blvd Ste 6100 Sample Descript MW-2 Received 10/16/98 <br /> Lafayette, CA 94549 Matrix LIQUID - <br /> Analysis Method 8015Mod/8020 Analyzed 10/21/98 <br /> Attention Christa Marting Lab Number 981OC43-02 Reported 10f30f98 <br />'QC Batch Number GC102198BTEX30A <br /> Instrument ID GCHP30 <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 0 50 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br />' Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 85 <br /> 1 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br />&EQUOIA ANALYTICAL - E"LAP 01210 <br /> Mei Mei Shin <br />�ct Manager Pae 2 <br /> 9 <br />