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680 Chesapeake Dnve Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> Sequoia 404 N Wiget lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 8 F9 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, 51539 42 1300 Sampled 11/11/97 <br /> 468 Mt Diablo Blvd Ste 8100 Sample Descrlpt P2 Received 11/12/97 <br /> iafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 11/22/97 <br /> Attention Christa Marting Lab Number 9711732-11 Reported 12102j97 <br /> C Batch Number GC112297BTEX21A <br /> strument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br />�4nalyte Detection Limit Sample Results <br /> ug/L ug/L <br /> f TPPH as Gas 500 1300 <br /> ethyl t-Butyl Ether 25 N D <br /> Benzene so 25 <br /> Toluene 50 N D <br /> Ethyl Benzene 50(ylenes (Total) 50 N D <br /> Chromatogram Pattern Gas <br /> F <br /> urrogates Control Limits % % Recoveryrifluorotoluene 70 130 98 <br /> lie <br /> Anaiytes reported as N D were not present above the stated limit of detection <br /> REQUOIA ANALYTICAL - ELAP 41210 <br /> 1 34A�� <br /> rd Herling <br /> jfflct Manager Page t4 <br />