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' Sequoia 680 Chesapeake Drive Redwood CGry CA 94063 (650) 364-9600 FAX(650) 364-9Z33 <br /> q 404 N Wlget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> raAvenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921 0100 <br /> Analytical 8 <br />' 145519StMcDkerowell Blvd North 5te 0 Petaluma_CA 94954 (707)792-1865 FAX(707)792 0342 <br /> EA Engineering Science &Tech Client Prot ID Exxon 7-0137, 5150137 1300 Sampled 07/15/98 <br />' 3468 Mt Diablo Blvd Ste 6100 Sample Descript MW-1 Received 07/22/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 07/29/98 <br /> Attention Christa Marting Lab Number 9807D08-01 Reported 08JO3198 <br /> lQC Batch Number GC0729986TEX21A <br /> Instrument ID GCHP21 <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 <br /> Toluene 050 N D <br /> ND <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br /> ISurrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 79 <br /> knaiytes reported as N D were not present above the stated limit of detectron <br />[EQUOIA. ANALYTICAL - ELAP #1210 <br /> rd Herling <br /> ct Manager <br /> Page 1 <br />