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' f ■ , Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> 6 X1,7 Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 <br /> (916) 921 9600 FAX(916)921 0E00 <br /> I <br /> EA Engineering Science &Tech Client Prod ID Exxon 7-3942/5153942 1300 Sampled 02/03/97 <br /> 3468 Mt Diablo Blvd Ste B10D Sample Descnpt MW10 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 9702110-05 Reported 02j12197 <br /> IC Batch Number GCO20597BTEX02A <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 20000 66000 <br /> Methyl t-Butyl Ether 250 1800 <br /> Benzene 200 1500 <br /> Toluene 200 18000 <br /> Ethyl Benzene 200 2100 <br /> Xylenes (Total) 200 9500 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 89 <br /> 4nalytes reported as N D were not present above the stated limit of detection <br /> 1EQUOIA ANALYTICAL - ELAP #1210 <br /> lr i <br /> I <br /> '011 ett t <br /> ct Manager Page <br /> ee 5 i <br /> z <br /> `t <br /> 1 <br />