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Sequoia 680 C4esapeake Drive Redwood City Ca 94063 (4I3) 364 9600 FAX 14151 364 9233 <br /> 404 ', V1q,c Fane Walnut Creek CA 94598 (510) 983 9000 FAX(>10) 983 9673 <br /> Analytical 319 Scnker avenue Suite 8 Sacramento CA 95334 (956) 921 9600 FAX(916) 921 0100 <br /> EA Engineering Science&Tech Client Prol ID Exxon 7-3942/8373942 1307 Sampled 10/19/95 <br /> 3468 Mt Mablo Blvd Ste 6100 Sample Descrlpt 3942 MW4PP 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 OF27-16 Reported 10J27J95 <br />' QC Batch Number GC1 02495BTEX21 A <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 1000 <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene so 19 <br /> Toluene so N D <br /> Ethyl Benzene 50 18 <br /> Xylenes (Total) 50 6 0 <br /> Chromatogram Pattern Gas <br />' Surrogates Control Limits % % Recovery <br /> Trifluorotol uene 70 130 79 <br /> 1 <br /> 1 <br />' Analytes reported as N D were not present above the stated limit of detection <br /> SEQU A YTICAL ELAP #1210 <br /> i <br /> r <br /> y Penner <br /> lett Manager Page 16 <br />