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' Sequoia 680 Chesapeake Drive Redwood Gty,CA 94063 (415) 364 9600 FAX(415) 364 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 Pro) ID "Exxon 7-3942, 5153942 1300 _ Sampled 11/04/96 <br />' 3468 Mt Diablo Blvd Ste B100 Sample Descript V4 Received 11/05/96 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 11/08/96 <br /> Attention Tracy Faulkner_ Lab Number---9611209-19 _ Reported_11 j12196_ <br /> QC Batch Number GC'11-0896BTEX20A <br /> Instrument ID GCHP20 <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 25000 120000 <br /> Methyl t-Butyl Ether 1250 N D <br /> Benzene 250 3200 <br /> Toluene 250 24000 <br /> Ethyl Benzene 250 2900 <br /> Xylenes (Total) 250 15000 <br /> Chromatogram Pattern Gas <br />' Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 83 <br /> S <br /> Analytes reported as N D were not present above the stated IIm11of defection <br /> SEQUOIA ANALYTICAL - ELAP 41210 <br /> r <br /> vin Follett <br /> Project Manager Page 1s <br />