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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9333 <br /> 404 N Wig,, Lane Walnut Creek CA 94598 (510) 988 966 FAX(510) 989 9673 <br /> Analytical 819 Stnker Avenue Suite a Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> f <br /> EA Engineering Science&Tech Client Prof ID Exxon 7-3942, 51539 42 1300 Sampled 08/26/97 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript MW8 Received 08/27/97 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 08/29/97 <br /> , Attention Christa Marting Lab Number 97081;45-07 Reported 09J04197 <br /> QC Batch Number GC082997BTEX06A <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 2500 35000 <br /> Methyl t-Butyl Ether 25 150 <br /> Benzene 25 <br /> Toluene 25 S3 <br /> 950 <br /> Ethyl Benzene 25 2200 <br /> Xylenes (Total) 25 7500 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 82 <br />[alytes re orted as N D were not resent ab vP p above the stated limit of detection <br />�EQUOIA ANALYTICAL - ELAP #1210 <br /> L <br /> iHerling <br />'r Manager Page 5 <br />