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' Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650) 364 9233 <br /> 404 N Wiget Lane Walnut 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 Engmeerfng Science&Tech Client Prol ID Exxon 7-3942, 51539 42 1300 Sampled 08/26/97 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript IW1 Received 08/27/97 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 08/30/97 <br /> Attention Chnsta Marting. Lab Number 9708E45-17 Reported 09/04197 <br /> QC Batch Number GC083097BTEX06A <br /> Instrument ID GCHP06 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 250 2400 <br /> Methyl t-Butyl Ether 12 14 <br /> Benzene 25 17 <br /> Toluene 25 N D <br /> Ethyl Benzene 25 130 <br /> Xylenes (Total) 2 5 97 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits % % Recovery <br /> Triffuorotoluene 70 130 97 <br />� i <br /> I <br /> I <br /> I <br /> I <br /> I <br /> Analytes reported as N D were not present above the stated limit of detection <br /> k011.1101A ANALYTICAL - ELAP #1210 <br /> I" Z e2L <br /> Rod Herlfng <br /> t Manager Page t3 <br /> I <br />