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' 680 Chesapeake Dnvc Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> Sequoia <br /> i 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> frlll� Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)92 t 0100 <br /> EA Engineering Science &Tech Client Pro) ID Exxon 7-3942, 51539 42 1 300 Sampled 11/11/97 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript TB Received 11/12/97 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 11/22/97 <br /> Attention Chnsta Martmg Lab Number 9711733-06 Reported 12J02197 <br /> C Batch Number GC102297BTEX02A <br /> strument ID GCHP02 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br />'Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> ITPPH as Gas 50 N D <br /> Methyl t-Butyl Ether, 25 N D <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Surrogates <br /> 70 130 92 <br /> lie <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> LEQUOIA ANALYTICAL - ELAP 41210 <br /> P <br /> rd Harling <br /> Fr sect Manager Page 7 <br />