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Sequoia 680 Chesapeake Drive Redv,00d Cit) CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 304,N u eget Lane Walnut Creek CA 94598 (510) 988 9600 FA_X (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 08/08/96 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript RW1 Received 08/09/96 <br /> Lafayette CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 08/18/96 <br /> Attention Tracy Faulkner Lab Number 9608581-09 Reported 08J22f 96 <br />' QC Batch Number GCO61 896BTEX1 7A <br /> Instrument ID GCHP17 <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 5000 20000 <br /> Methyl t-Butyl Ether 250 N D <br /> Benzene 50 600 <br /> Toluene 50 3200 <br /> Ethyl Benzene 50 1200 <br /> Xylenes (Total) 50 3500 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 103 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP *1210 <br /> r <br /> 1 <br /> Kevin Fi lett <br /> Project Manager Page 9 <br />