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Sequoia 580 Chesapeake Drive Redwood Gty 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 /> B19 StriAvenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> fall>� <br /> Analytical 1455 McDkerowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <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 MWD Received 11/19/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 12/02/98 <br /> Attention Chnsta Marting Lab Number 9811 D71-20 Reported 12/03198 <br />�QC Batch Number GC120298BTEX17A <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 20000 110,000 <br /> Methyl t-Butyl Ether 1000 1700 <br /> Benzene 200 11000 <br /> Toluene 200 23000 <br />' Ethyl Benzene 200 3100 <br /> Xylenes (Total) 200 14000 <br /> Chromatogram Pattern GAS <br /> Surrogates Control Limits % % Recovery <br /> Trlfluorotoluene 70 130 99 <br /> 1 <br /> 1 <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> FEQUOIA ANALYTICAL - ELAP #1210 <br /> ifect <br /> Mei Shin <br /> Manager Pae 1 <br /> 9 <br />