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i <br /> al <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N WiBct Lane Walnut Creek CA 94598 (510) 983 9600 FAX(510) 988 9673 <br /> frlll� Analytical 819 Stnker Avenue Su=te 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0E00 <br /> EA Engineering Science &Tech _ Client Prol ID Exxon 7-3942, 5153942 1300 Sampled 03/03/98 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript P1 Received 03/04/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 03/16/98 <br /> Attention Christa Marting Lab Number 9803306-16 Reported 03j31198 <br /> C Batch Number GC0316986TEX21A <br /> strument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detectfon Limit Sample Results <br /> ug/L ug/L <br />'TPPH as Gas 50 940 <br /> Methyl t-Butyl Ether 25 13 <br /> Benzene 050 20 <br /> Toluene 0 50 1 1 <br /> LEthyl Benzene 050 91 <br /> Xylenes (Total) 050 28 <br /> Chromatogram Pattern Gas <br />'Surrogates Control Limits % % Recover <br /> Trifluorotoluene 70 130 93 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> 1EQUOIA ANALYTICAL - ELAP 01210 <br /> r,d Herling <br /> ct Manager Page 14 <br />