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Sequoia lora 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 1 404 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 Prol ID Exxon 7-3942/5153942 1300 Sampled 02/03/97 <br /> 468 Mt Diablo Blvd Ste 6100 Sample Descript MW1 Received 02/04/97 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 02/06/97 <br /> Attention Chnsta Marting Lab Number 9702110-12 Reported 02112197 <br /> C Batch Number GCO20597BTEX21A <br /> strument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Valyte Detection Limit Sample Results <br /> ug/L. ug/L <br /> IPPH as Gas 50 82 <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 050 N D <br /> Toluene 050 N D <br />'Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Unidentified HC >C7 <br /> turrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 102 <br /> 1 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> 1EQUOIA ANALYTICAL - ELAP #1210 <br /> h <br /> Folett <br /> ect Manager Page 12 <br />