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Sequoia 680 Chesapeake Drive 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 /> 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 B100 Sample Descrlpt P2 Received 02/04/97 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 02/06/97 <br /> Attention Christa Marting Lab Number 9702110-10 Reported 02f 12/97 <br /> C Batch Number GCO20597BTEX02A <br /> strument 1D GCHP02 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br />'Analyte Detection Limit Sample Results <br /> ug/L. ug/L <br /> FTPPH as Gas 200 1500 <br /> ethyl t-Butyl Ether 25 13 <br /> Benzene 20 N D <br /> Toluene 2 0 N D <br /> Ethyl Benzene 2 0 52 <br /> Xylenes (Total) 2 0 17 <br /> Chromatogram Pattern Gas <br /> lSurro ates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 110 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> REQUOIA ANALYTICAL - ELAP #1210 <br /> �r <br /> ollett <br /> ct Manager Page 10 <br /> I <br />