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' Sequoia 680 Chesapeake Drive Redwood City Ca 94063 (415) 364 9600 FAX(415)364 9233 <br /> r..�h 1 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)966 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> - EA Engineering Science&Tech _ Client Prod ID Exxon 7-3942, 5153942 1300 z-= Sampled 11/04/96 <br /> „ 3468 Mt Diablo Blvd Ste B100 Sample Descript MW9 Received 11/05/96 „ <br /> - Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 11/07/96 <br /> Attention Tracy Faulkner_ _ Lab Number 9611209-09 Reported_1 1 f 12196 <br /> _ z. _ <br /> QC Batch Number GC110796BTEX20A <br /> zZ <br /> Instrument 1D GCHP20 <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 1000 1700 <br /> Methyl t-Butyl Ether 50 160 <br /> Benzene 10 370 <br /> Toluene 10 N D <br />' Ethyl Benzene 10 24 <br /> Xylenes (Total) 10 26 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 88 <br /> 1 ` <br /> Analytes reported as N D were not present above the stated I,mlt of detection <br />' SEQUOIA ANALYTICAL - ELAP #1210 <br /> Ai Follett <br /> rolect Manager Page 9 <br />