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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 (510)988 9673 <br /> Analytical 819 Striker Avenue Suitt 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> EA Engineering Science &Tech - Client Pra] 1D Exxon 7-0137, 5150 137 13fl0 Sampled -67—/21/97 <br /> ` 3468 Mt Diablo Blvd Ste B100 Sample Descrlpt MW5 Received 07/23/97 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/6020 Analyzed 07/30/97 <br /> Attention-Chpsta Marting__ Lab Number 9707897-08 Reported 08/04/97_ - <br /> O`C Batch Number GC0730978TEX03A m - — -------— µ " --T -- <br /> strument 1D GCHP3 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> I <br /> ug/L ug/L <br /> TPPH as Gas 50 N D <br /> Methyl t-Butyl Ether 25 60 <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) N D <br /> Chromatogram D50 Pattern <br />'Surrogates Control Limits % % Recovery <br /> Trdluorotoluene 70 130 101 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> 1EQUOIA ANALYTICAL - ELAP #1210 <br /> Z <br /> n Follett <br /> ct Manager <br /> Page 8 <br />