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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) 983 9600 FAX(510) 988 9673 <br /> Analytical 819 Sinker Avenge Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> EA Engineering Science&Tech Client Prol ID Exxon 7-3942/83739421307 Sampled 05/11/95 <br />' 3468 Mt Diablo Blvd Ste 13100 Sample Descript RW-4 Received 05/12/95 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 05/19/95 _ <br /> Attention T Faulkner Lab Number 9505983-12Reported 05123195 , <br />' QC Batch Number GC051995BTEX21A <br /> Instrument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br />' Analyte Detection Limit Sample Results <br /> ug/L ug/L <br />' TPPH as Gas 10000 59000 <br /> Benzene 100 1400 <br /> Toluene 100 11000 <br /> Ethyl Benzene 100 1600 <br />' Xylenes (Total) 100 7400 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits% % Recovery <br />' Trifluorotoluene 70 130 78 <br /> b <br /> 1 <br /> 1 <br />' Analytes reported as N D were not present above the stated lima of detection <br /> SEQU A YTICAL - ELAP #1210 <br /> eggy Penner <br /> rolect Manager Page 12 <br />