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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404N Wiget Cane Walnut Creek,CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> Analytical 819 Straker Avenue Suite 9 Sacramento,CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> EA Engineering Science&Tech " N Client Proj ID Exxon 7-3942, 5153942 1300 Sampled 11/04/96 <br /> 3468 Mt Diablo Blvd Ste 8100 Sample Descript RW1 Received 11/05/96 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 11/07/96 <br /> - Attention Tracy Faulkner _ Lab Number 9611210-21 _ Reported_11 J12j96 V <br /> QC Batch Number GC1107968TEX21A— <br /> lnstrument ID GCHP21 <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 5000 23000 <br /> Methyl t-Butyl Ether 250 900 <br /> Benzene 50 710 <br /> Toluene s0 2600 <br />' Ethyl Benzene 50 1200 <br /> Xylenes (Total) <br /> 50 <br /> 3200 <br /> Chromatogram Pattern Gas <br />' Surrogates Control Limits % % Recovery <br /> Tnfluorotoluene 70 130 90 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> 1 <br /> vFollett <br /> A <br /> rolect Manager Page 2 <br />