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Sequoia o90 Chesapeake Dnve Redwood City CA 940o3 (415} 304 9600 FAX(415, 364 9,33 <br /> 404 �, Vlgtc Lane \Valnut Creek Ca 94599 (510) 933 9600 FAX (510) 933 9673 <br /> Analytical 9195cnkerAYtnut Since 8 Sacramento CA 95334 (916) 921 9600 FAA(916) 92I 0tDo <br /> 1 <br /> EA Engineering Science &Tech Client Prol ID Exxon 7-3942/8373942 1307 Sampled 10/19/95 <br /> 3468 Mt Diablo Blvd Ste 8100 Sample Descript MW2 Received 10/20/95 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 10/24/95 <br /> Attention Tracy Faulkner Lab Number 951 OF27-17 Reported 10J27/95 <br />' QC Batch Number GC102495BTEX21A <br /> Instrument ID GCHP21 <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 500 1300 <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene so 24 <br /> Toluene 50 N D <br /> Ethyl Benzene 50 48 <br /> Xylenes (Total) 50 13 <br /> Chromatogram Pattern Gas <br />' Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 73 <br /> Analytes reported as N 13 were not present adore the stated limit W detection <br /> SEQUOIA A A - ELAP #1210 <br /> ggy Penner <br /> rolect Manager Page 17 <br />