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' Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510)988-9600 FAX(510)988-9673 <br /> 819 Straker Avenue 5urte 8 Sacramento CA 95834 (916)921-9600 FAX(916)921 0100 <br /> Analytical 1455 McDowell Blvd North Ste 0 Petaluma.CA 94954 (707)792-1865 FAX(707) 792-0342 <br /> EA Engineering Science &Tech Client Prol ID Exxon 7-3942, 5153942 1300 Sampled 05/20/98 <br /> 468 Mt Diablo Blvd Ste B100 Sample Descript P2 - Received 05/21/98 <br /> afayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 06/03/98 <br /> Attention Christa Martfng, Lab Number 9805E41-17 Reported 06/10198 <br />�C Batch Number GC060398BTEX21A <br /> strument 1D GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Fnalyte Detection Limit Sample Results <br /> ug/L ug/L <br /> lTPPH as Gas 200 984 <br /> ethyl t-Butyl Ether 10 N D <br /> enzene 20 82 <br /> Toluene 20 N D <br /> thyl Benzene 20 18 <br /> ylenes (Total) 20 20 <br /> hromatogram Pattern Gas <br /> Iurrogates Control Limits % % Recover <br /> nfluorotoluene 70 130 87 <br /> analytes reported as N 0 were not present above the stated limit of detection <br /> tOUOIA ANALYTICAL - ELAP #1210 <br /> � 1 <br /> rd Herling t� <br /> ct Manager Page 34 <br />