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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (415) 364 9600 FAX;415) $64 9233 <br /> 404 N Wigct lane Walnut Creek CA 94598 (510) 988 9600 FAX 010) 988 9673 <br /> 11460 <br /> Analytical 819 Stnker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> EA Engineering Science&Tech Client Prol ID Exxon 7-0137, 5150137 1300 Sampled 04/01/97 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript MW-5 Received 04/02/97 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 04/09/97 <br /> Attention Christy Marting Lab Number 9704171-09 Reported 04f14j97 <br />� <br /> C Batch Number GC040997BTEX17A <br /> nstrument ID GCHP17 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 50 120 <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 /> Unidentified HC C6-C8 <br /> Surrogates Control Limits % %' Recover Trifluorotoluene 70 130 109 <br /> 1 <br /> 1 <br /> Analytes reported as N 0 were not present above the stated Iimit of detection <br /> 1EQUOIA ANALYTICAL - ELAP #1210 <br /> r <br /> Follett <br /> t Manager Page 9 <br />