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Sequoia 680 Chesapeake Dnve Redwood City,CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> IF <br /> „� Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> EA Engineering Science &Tech Client Prol ID Exxon 7-3942/5153942 1300 Sampled 02/03/97 <br /> 3468 Mt Diablo Blvd Ste 6100 Sample Descnpt MW8 Received 02/04/97 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 02/06/97 <br /> Attention Chrlsta Marting Lab Number 9702110-07 Reported 02j12j97 <br /> tC Batch Number GCO20597BTEX02A <br /> strument ID GCHP02 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br />`Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> IJTPPH as Gas 10000 42000 <br /> Methyl t-Butyl Ether 120 N D <br /> Benzene 100 N D <br /> Toluene 100 1400 <br /> Ethyl Benzene 100 2500 <br /> Xylenes (Total) 100 9900 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits% % Recovery <br /> ITrifluorotoluene 70 130 97 <br /> analytes reported as N D were not present above the staled limit of detection <br /> 1EQUOIA ANALYTICAL - ELAP 01210 <br /> Konett <br /> ct Manager Page 7 <br />