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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> q 404 N Wiget lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br />' 1455 McDowell Mvd North Ste D Petalum.?4 CA 94954 (707)792-1865 FAX(707)79Z-0342 <br /> EA Engineering Science &Tech Client Pro) ID tx-xon 7-0137,-5150137 1300 Sampled 10/14/98µ <br /> F3468 Mt Diablo Blvd Ste B100 Sample Descnpt MW-3 Received 10/16/98 - <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 10/22/98 <br /> Attention Chnsta Marting Lab Number 981OC43-03 Reported 1 OJ30198 <br /> QC Batch Number GC102298BTEX17A[InstrumentlD GCHP17 <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 25 30 <br /> Benzene 0 50 N D <br /> Toluene 050 N D <br />' Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br />' Surrogates Control Limits % % Recovery <br /> Trrfluorotoluene 70 130 101 <br /> 1 <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Vlei Mei Shin <br /> Prct Manager <br /> Page 3 <br />