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r Sequoia 660 Chesapeake Drive Redwood City CA 94063 (650)354 9600 FAX(650)36A-9Z33 <br /> 404 N W get Lane Walnut Creek CA 94596 (510)968-9600 FAX(510)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95634 (916)921 9600 FAX(9t6)921 0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707) 792 1865 FAX(707)79Z 0342 <br /> 6 <br /> EA Engineering Science &Tech Client Prod ID Exxon 7-3942, 5153942 1300 Sampled 05/20/98 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript V2 Received 05/21/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 06/03/98 <br /> Attention Chnsta Marting Lab Number 9805E41-19 Reported 06/10198 <br />�C Batch Number GCO60398BTEX21A <br />■nstrument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> I <br /> ug/L. ug/L. <br />' TPPH as Gas 20000 100000 <br /> Methyl t-Butyl Ether 1000 N D <br /> Benzene 200 6700 <br /> Toluene 200 22000 <br />' Ethyl Benzene 200 2500 <br /> Xylenes (Total) 200 12000 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits % %' Recove Trifluorotoluene 70 130 84 <br /> L <br /> analytes reported as N D were not present above the stated limit of detection <br /> 1EQUO11A ANALYTICAL - ELAP #1210 <br /> P"rd Herling <br /> ect Manager Page 38 <br />