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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 (92S)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> �Ilt� Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)791-1865 FAX(707)792-0342 <br /> EA Engineering Science &Tech Client Prol IDs Exxon7-0137, 5150137 1300 Sampled 01/26/99 <br /> 3468 Mt Diablo Blvd Ste Bt00 Sample Descrlpt MW1 Received 01/28/99 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 01/30/99 <br /> Attention-Matt Derby Lab Number 9901089-01 Reported 02103199 <br /> QC Batch Number GCO130998TEX30A - <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 N D <br /> Benzene 0 50 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 98 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> �it I <br /> 0ect Manager Pae <br /> S <br />