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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(5 WO 988 9673 <br /> AO Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> EA Engineering Science &Tech Client Prol ID Exxon 7-3942 / 8373942 13D7 Sampled 02/13/96 <br /> 3468 Mt Diablo Blvd Ste 8100 Sample Descrlpt RW1 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 9602A05-18 Reported 02123f96 <br />' QC Batch Number GCO21696BTEX2fA <br /> Instrument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Lin-A Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 5000 21000 <br /> Benzene 50 590 <br /> Toluene 50 2900 <br /> Ethyl Benzene 50 920 <br />' Xylenes (Total) 50 2700 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits% % Recovery <br />' Trifluorotoluene 70 130 83 <br /> r <br /> t <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> vin Follett <br /> olect Manager Page tB <br />