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Sequoia 680 Chesapeake Dnvc Redwood City CA 94063 (415) 364 9600 FAX`415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (516) 988 9600 FAX 1,510)988 9673 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> EA Engineering Science &Tech Client Prot ID Exxon 7-0137, 5150137 1300 Sampled 04/01%97 <br /> 3468 Mt Diablo f3lvd Ste B100 Sample Descript MW-3 Received 04/02/97 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 04/09/97 <br /> Attention Chnsta Marting " Lab Number 9704171-06 _ Reported 04114197 <br />�OC Batch Number GC040997BTEX17A " <br /> Instrument ID GCHP17 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Anafyte Detection Limit Sample Results <br /> ug/L ug/L <br />' TPPH as Gas 50 230 <br /> Benzene 0 50 1 1 <br /> Toluene 0 50 076 <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 1 3 <br /> Chromatogram Pattern <br /> Gas & Unidentified HC C6-C8 <br /> Surrogates Control Limits % <br /> /o Recovery <br /> Trifluorotoluene 70 130 113 <br /> 1 <br /> Analytes reported as N D were not present above 1he stated limit of defection <br /> tEQUOIA ANALYTICAL - ELAP #1210 <br /> rn Follett <br /> ect Manager Page 6 <br /> 1 <br />