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f Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Watnut 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 7-0137, 5150137 Sampled 10/16/96 „ <br />' 3468 Mt Diablo Blvd Ste B100 Sample Descript MW5 Received 10/17/96 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 10/21/96 <br /> Attention Tracy Faulkner Lab Number 9610A56-08 Reported 1 OJ23196 <br />' QC Batch Number GC102196BTEX21A <br /> Instrument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br />' Analyte Detection Limit Sample Results <br /> ug/L ug/L <br />' TPPH as Gas 50 130 <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 <C8 <br />' Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 108 <br /> 1 <br />,Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> i <br /> in Follett <br /> Project Manager Page 8 - <br />