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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 /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)921 0100 <br /> �lll� Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792 1865 FAX(707)79Z D342 <br /> EA Engineering Science &Tech Client Pro] 1D Exxon 7-3942, 5153942 1300 Sampled 05/20/98 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descnpt MW11 deceived 05/21/98 <br /> Lafayette CA 94549 Matrix LIQUID _ <br /> Analysis Method 8015Mod/6020 Analyzed 06/04/98 <br /> Attention Chrlsta Marting Lab Number 9805E41-10 Reported 06f 10198- <br /> C Batch Number GC060498BTEX03A - -� <br /> nstrument ID GCHP03 <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 50 N D <br /> Methyl t-Butyl Ether 26 N D <br /> Benzene 050 N D <br /> Toluene 0 50 N D <br />' Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br />' Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 95 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> FEOUOIA ANALYTICAL - ELAP #1210 <br /> Pand Herling <br /> ect Manager Page 20 <br />