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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> �"►�' -1 404 N W get Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> Analytical 819 Stnker Avenue Suite 8 Sacramento CA 95834 (916) 911 9600 FAX (916)911 0100 <br /> EA Engineering Science &Tech _ Client Prol ID Exxon 7-0137, 51501 37 1300 Sampled 01/14/98 <br /> 3468 Mt Diablo Blvd Ste 6100 Sample Descrlpt MW4 Received 01/15/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 01/26/98 <br /> Attention Christa Marting Lab Number 9801803-04 Reported 01_f30j98 <br /> C Batch Number GC01-2698BTEX18A - -- - - - - - - - -- -- - <br /> Instrument ID GCHP18 <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 />(Surrogates Control Limits % % Recove <br /> Trifluorotoluene 70 130 92 <br />(alytes reported as N D were not present above the stated limit of detection <br /> EQUOIA ANALYTICAL - ELAP 41210 <br /> (Am <br /> rojectard Hering Manager Page 4 <br /> I <br />