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' Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (415) 364 9600 FAX;415) 364 9233 <br /> 404 N W,Bet Lane Walnut Creek CA 94598 (510) 988 9600 FAX(50 988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (9t6) 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 $100 Sample Descrlpt MW-4 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 9704171-07 _ Reported 04J14J97 <br />'QC Batch Number GC040997-BTEX17A -- <br /> Instrument ID GCHP17 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> I Analyte Detection Limit Sample Results <br /> ug/L ug/L <br />' TPPH as Gas 50 N D <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyf Benzene 050 N D <br />' Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br />' Trrfluorotoluene 70 130 113 <br /> I <br /> I <br /> Analytes reported as N D were not present above the stated limit of detection <br /> FEQUOIA ANALYTICAL - ELAP #1210 <br /> Follett <br /> ct Manager Page 7 <br /> I <br />