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j Sequoia 680lesa'r Drrve Redwood 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 Avenue Suite 8 Sacramento CA 95634 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707) 792-1865 FAX(707)792-0342 <br /> f'EA Engineering Science &Tech-_ Client Prol ID Exxon 7-3942, 5153942 1300 Sampled 11/18/98 <br /> 3468 Mt Diablo Blvd Ste 13100 Sample Descript UVB-MW1 Received 11/19/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysts Method 8015MDd/8020 Analyzed 11/29/98 <br /> Attention Chrlsta Marting Lab Number 9811D70-14 Reported 12J03198 <br />' QC Batch Number GC1129986TEX02A <br /> Instrument 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 20000 100000 <br /> Methyl t-Butyl Ether 1000 N D <br /> Benzene 200 12000 <br /> Toluene 200 27000 <br /> Ethyl Benzene 200 3200 <br /> Xylenes (Total) 200 16000 <br /> Chromatogram Pattern GAS <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 94 <br /> I <br /> I <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> ' 2, �z.Q c/ <br /> et Mel Shin <br /> lett Manager Page 14 <br />