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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(5 E0)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento Ca 95834 (916) 921 9600 FAX(9 16)921 0100 <br /> EA Engineering Science&Tech - Client Proi-ID - Exxon 7-3942, 5153942 1300- ~� Sampled 11/04/96 _ <br />' 3468 Mt Diablo Blvd Ste B100 Sample Descript IWi Received 11/05/96 _ <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 11/07/96 r <br /> Attention Tracy Faulkner - Lab Number 9611209-13 Reported 11112196_ - <br /> QC Batch Number GCS 1079667EX02A <br /> Instrument 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 500 3800 <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 5 0 50 <br /> Toluene 50 N D <br />' Ethyl Benzene 50 320 <br /> Xylenes (Total) 5 0 290 <br /> Chromatogram Pattern Gas <br />' Surrogates Control Limits % % Recovery <br /> Trilluorotoluene 70 130 116 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> n Follett <br /> rolect Manager Page 13 <br /> 1 <br />