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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (650) 364 9600 FAX(650)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 7-0137, 51501 37 1300 Sampled 01/14/98 <br />'3468 Mt Diablo Blvd Ste B100 Sample Descript MW7 Received 01/15/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 01/28/98 <br /> Attention Christa Marting Lab Number 9801803-07 Reported 01 f30J98 <br /> C Batch Number GC012898BTEX06Atstrument ID GCHP6 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> lAnalyte Detection Limit Sample Results <br /> ug/L ug/L <br />'TPPH as Gas 50 73 <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 /> HC C6-C8 <br /> frii,denil,fied <br /> urrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 89 <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 /> rd Herling <br /> Ject Manager Page 7 <br />