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Sequoia 680 Chesapeake Dnve Redwood Ory CA 94063 (650} 364 9600 FAX(650} 364 9233 <br /> 404 N Wget Lane Walnut Creek CA 94598 (925)988 9600 FAX(925)988 9673 <br /> Analytical 819 Sinker Avenue Swte 8 Sacramento CA 95834 (916)921 9600 FAX(916)921 0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 792-1865 FAX(707) 792 0342 <br /> EA Engineering Science &Tech Client Prol ID Exxon 7-3942, 5153942 1300 Sampled 08/19/98 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript MW6 Received 08/20/98 <br /> Lafayette, CA 94,549 Matrix LIQUID <br /> sis <br /> Attention Christa Marting AnaablNumberhod 9808C95 Q5d/8020 Analyzed 08/26/98 <br /> Reported 09f 04 f 98 <br /> fC Batch Number GC082698BTEX03A <br /> nstrument 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 25 N D <br /> Benzene 050 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits %� % Recovery Trifluorotoluene 70 130 80 <br /> ialytes reported as N 0 were not present above the stated limit of detection <br /> IEQUOIAANALYTfCAL - ELAP #1210 <br /> cHerling <br />�o anager Page 10 <br />