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Sequoia 680 Chesapeake Drive itedwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker AvenueSuitt 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-010 0 <br /> frlll� Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792 1865 FAX(707)79Z-0342 <br /> EA Engineering Science &Tech Client Prol ID Exxon 7-3942, 5153942 1300 Sampled 11/18/98 - <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript RW4 Received 11/19/98 - <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 11/27/98 <br /> Attention Chnsta Marting Lab Number 9811 D70-19 Reported 1?J03198 - <br /> QC Batch Number GC1 12798BTEX1 7A - - <br /> Instrument ID 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 500 5600 <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 50 300 <br /> Toluene 5 0 480 <br />' Ethyl Benzene so 400 <br /> Xylenes (Total) 5 0 970 <br /> Chromatogram Pattern GAS <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 94 <br />! <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br />!SEQUOIA ANALYTICAL - ELAP #1210 <br /> . . ,v <br /> Mei Mei Shin <br /> 01ject Manager Page �s <br /> s <br />