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680 Chesapeake peakt bnve Redwood Gry, CA 94063 (415) 364 9600 FAX(415) 354 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(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 11/04/96 <br /> 3468 Mt Diablo Blvd Ste 8100 Sample Descrlpt RW4 Received 11/05/96 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 11/07/96 <br />' " Attention Tracy Faulkner Lab Number 9611209-04 --- s _ --' =Reported i tf T2/96- <br /> QC Batch Number GCT 10796BTEX20A <br /> Instrument ID GCHP20 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit <br /> Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 5000 36000 <br /> Methyl t-Butyl Ether 250 N D <br /> Benzene 50 1600 <br /> Toluene 50 5200 <br /> Ethyl Benzene 50 1300 <br /> Xylenes (Total) 50 4900 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits % % Recove <br /> Trifluorotoluene 70 130 89 <br /> I <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> 12AIVI /W"`_� <br /> jWv, oIl6ftn F <br /> Prolect Manager Page 4 <br />