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� � • <br /> - 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(5 1o)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sattamcnto 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 /> i 3468 Mt Diablo Blvd Ste B100 Sample Descript MW-1 Received 04/02/97 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 04/08/97 <br /> Attention Christa Matting _Lab Number 9704171-04 Reported 04114197 <br /> iQC Batch Number GC040B97BTEX21A <br /> Instrument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> iTPPH as Gas 50 N D <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> iXylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> ITrifluorotoluene 70 130 104 <br /> I <br /> I <br /> i <br /> I <br /> I <br /> Analytes reported as N 0 were not present above the staled limit of detection <br /> ISEQUOIA ANALYTICAL - ELAP #1210 <br /> In Follett <br /> lect Manager Page 4 <br /> 1 <br />