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1 Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364-9233 <br /> 404 N Wtget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Stnker Avenue,Suitt 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> EA Engineering Science&Tech Client Prod ID Exxon 7-3942/5153942 1300 Sampled 02/03/97 <br /> 3458 Mt Diablo Blvd Ste B100 Sample Descript Rinse Blank Received 02/04/97 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 02/05/97 <br /> Attention Christa Marting Lab Number 9702110-02 Reported 02J12197 <br /> C Batch Number GCO20497BTEX03B -Istrument ID GCHP03 <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 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> 7rifluorotoluene 70 130 103 <br /> I <br /> 4nalytes reported as N D were not present above the stated limit of detection <br /> 1EQUOIA ANALYTICAL - ELAP 41210 <br /> r <br /> kFo ett <br /> Manager Page 2 <br />