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Sequoia 680 Chesapeake Drive Redwood City CA 94('53 (415) 364 9600 FAX(4t5) 364 9233 <br /> 404 N Wigec Lane Walnut Creek CA 94598 (510) 988 9600 FAX(a 10) 988 9673 <br /> trrll� Analytical 819 Striker Avenue Suite 8 Sacramento C4 95834 (9 16) 921 9600 FAX(916) 921 0100 <br /> EA Engineering Science&Tech Client Prol ID Exxon 7-3942 / 8373942 1307 Sampled 02/13/96 <br /> 3468 Mt Diablo Blvd Ste 8100 Sample Descript MW4 Received 02/14/96 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 02/16/96 <br /> Attention Tracy Faulkner Lab Number 9602A05-03 Reported 02/23196 <br />' QC Batch Number GCO216966TEX17A <br /> Instrument ID GCHP17 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br />' Analyte Detectio^ Limit Sample Results <br /> ug/L ug/L <br /> tTPPH as Gas 100 750 <br /> Benzene 1 0 4.4 <br /> Toluene 10 N D <br /> Ethyl Benzene 1 0 12 <br />' Xylenes (Total) 1 0 1 1 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits % % Recovery <br /> Tnfluorotoluene 70 130 101 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> vin Follett <br /> olect Manager Page 3 <br />