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Sequoia "peake awe Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wlget Lane walnut creek CA 94598 (9z5)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 14W Analytical 1455 McDowell Bard North Ste 0 Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> EA Engineering Science &Tech Client-Pros ID Exxon7-0137, 5150137 1300 Sampled 01/26/99 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript VEW2 Received 01/28/99 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 01/29/99 <br /> Attention MattDerby _ Lab Number 9901089-08 Reported 02J03J99 <br /> QC Batch Number GC012999BTEX30A <br /> Instrument ID GCHP30 <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 25 100 <br /> Benzene 050 051 <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 /> Trlfluorotoluene 70 130 77 <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Qect Manager Page S <br />