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SequoSequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> ia 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 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 Sampled 02/03/97 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript RW4 Received 02/04/97 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 02/06/97 <br /> Attention Christa Marting Lab Number 9702110-04 Reported 02112_/97 <br /> IC Batch Number GCO205978TEX02A <br /> strument ID GCHP02 <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 10000 42000 <br /> Methyl t-Butyl Ether 250 1300 <br /> Benzene 100 1700 <br /> Toluene 100 <br /> 6500 <br /> Ethyl Benzene 100 1900 <br /> Xylenes {Total} 100 7200 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 90 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> IEQUOIA ANALYTICAL - ELAP 41210 <br /> 1 :fir <br /> ollett <br /> ect Manager Page 4 <br /> I <br />