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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(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, 5153.942 1300 Sampled-11/04/96 <br />' - 3468 Mt Diablo Blvd Ste B100 Sample Descrlpt RW3 Received 11/05/96 w <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 11/08/96 <br /> ' Attention Tracy Faulkner»S Lab Number 9611209-16 _ _ _ _ Reported 11 f 12/96 = <br /> - -- <br /> QC Batch Number GC1i10896BTEX20A - <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 5000 67000 <br /> Methyl t-Butyl Ether 250 N D <br /> Benzene 50 4300 <br />' Toluene :. 50 4300 <br /> Ethyl Benzene 50 2600 <br /> Xylenes (Total) 50 .. 11000 <br /> Chromatogram Pattern Gas <br />' Surrogates Control Limits % % Recovery <br /> Trlfluorotoluene 70 130 79 <br /> 1 <br />' Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> vIn Follett <br /> Protect Manager page 16 <br /> 491I <br />