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i Sequoia 680 Ch.pcake 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(510) 988 9673 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916) 921-0100 <br />�EA Engineering �..-._.- <br /> Science &Tech Client Prol ID Exxon 7-0137, 5150137 1300 Sampled 07/21/97 <br /> 3468 Mt Diablo Blvd Ste 8100 Sample Descrlpt MW2 Received 07/23/97 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 07/28/97 <br /> µAttention Christa Martmg ___ _ Lab Number 97071597-09 = Reported-08/04/97 <br /> CBatch Number GC072897BTEX03A <br /> instrument <br /> ID GCHP3 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> I <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 50 N D <br />'Methyl t-Butyl Ether 25 N D <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 0 50 N D <br />'Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br />'Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 107 <br /> r <br /> Analytes reported as N D were not present above the stated limit of detection <br /> 1EQUOIA ANALYTICAL - ELAP #1210 <br /> in Follett <br /> ect Manager Page 10 <br />