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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650) 364 9233 <br /> 404 N %viget Lane Walnut Creek CA 94598 (925)988 9600 FAX(925)988 9673 <br /> 819 Sv ker Avenue Suite 8 Sacramento CA 95834 (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 /> EA Engineering S <br /> 9 9 ciente &Tech Glens Prof ID Exxon 7-3942, 5153942 1,300 Sampled 08/19/98 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript MW10 Received 08/20/98 <br />(Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 08/26/98 <br /> Attention Christa Marting Lab Number 9808C95-09 Reported 09/04/98 <br /> C Batch Number GCO82698BTEX02A <br /> strument ID GCHP03 <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 2 5 N D <br /> Benzene 050 077 <br /> Toluene 050 N D <br /> Ethyl Benzene <br /> lKylenes (Total) 050 N D <br /> hromatogram Pattern <br /> Surrogates Control Limits % % Recover <br /> Irrifluorotoluene 70 130 74 <br /> t <br /> lie <br /> I <br /> I i <br /> L <br /> r <br /> tL <br /> t <br /> I'lytes <br /> reported as N D were not present above the stated Amit of detection <br /> I:-QUOIA ANALYTICAL - ELAP 41210 = <br /> I;Herhng <br />,,f anager Page 18 <br /> t <br /> s <br /> t <br />