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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (650) 364 9600 FAX(650)364 92 33 <br /> 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) 92t 9600 FAX (916) 921 0100 <br /> EA Engineering Science &Tech Client Prol ID Exxon 7-3942, 51539 42 1300 Sampled 11/11/97 <br /> 3468 Mt Diablo Blvd Ste 6100 Sample Descrlpt MW4 Received 11/12/97 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 11/24/97 <br /> Attention Chnsta Marting Lab Number 9711732-03 Reported 12102197 <br /> C Batch Number GC112497BTEX02A <br /> strument ID GCHP2 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> Tag/L ug/L <br /> TPPH as Gas 200 720 <br /> Methyl t-Butyl Ether 10 N v <br /> Benzene 20 N D <br /> Toluene 20 N D <br /> Ethyl Benzene 2 0 N D <br /> Xylenes (Total) 20 N D <br /> Chromatogram Pattern <br /> Unidentified HC C6-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trifiuorotoluene 70 130 120 <br /> Analytes reported as N D were not present above the stated Emit of detection <br /> 1EQUOIA ANALYTICAL - ELAP #1210 <br /> VMect <br /> erling <br /> anager Page a <br />