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Sequoia 680 Chesapeake Drive 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 /> —!D— $19 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd forth,Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)79Z-0342 <br /> EA Engineering Science &Tech Client Prod ID Exxon7-0137, 5150137 1300 Sampled 01/26/99 <br /> 3468 Mt Diablo Blvd Ste 6100 Sample Descrlpt MW6 Received 01/28/99 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 01/29/99 <br /> Attention Matt Derby Lab Number 9901 D89-06 Reported 02j03/99 <br /> OC Batch Number GC012999STEX06A - <br /> Instrument ID GCHP06 <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 N D <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 83 <br /> i <br /> t <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Oct Manager Pae s <br /> s <br />