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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650) 364 9233 <br /> 444 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> jqjrI,,� Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 %04 FAX(916)921 et 00 <br /> EA Engineering Science &Tech Client Prol ID Exxon 7-3942, 5153942 1300 Sampled 03/03/98 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript MW8 Received 03/04/98 <br />'Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 03/17/98 <br /> Attention Chrlsta Marting Lab Number 9803305-07 Reported 03631/98 <br /> C Batch Number GC0317986TEX02A <br /> nstrument ID GCHP02 <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 26000 <br /> Methyl t-Butyl Ether 250 N D <br /> Benzene 50 N D <br /> Toluene 50 780 <br /> Ethyl Benzene s0 1900 <br /> Xyienes (Total) s0 6500 <br /> Chromatogram Pattern GAS <br /> Surrogates Control Limits % % Recovery <br /> Trlfluorotol uene 70 130 11 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> tEQUOIA ANALYTICAL - ELAP #1210 <br /> rand Heriing <br /> egit Manager Page 14 <br />