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Sequoia 680 Chesapeake Dave 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 /> Touchstone Developments Client Proj~ID Chevron 9-8264/8264-1 Sampled 11/07/95 <br /> 6280 Stoneridge Mall Rd B211 Sample Descnpt TH2O Received 11/08/95 <br /> Pleasanton, CA 94588 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 11/10/95 <br /> Attention Ann Marie Dockstader _ Lab Number 9511554-04 Reported 11J13J95 <br /> QC Batch Number GC1 10995BTEX1 7A -- <br /> Instrument ID GCHP17 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 20000 110000 <br /> Benzene 200 4100 <br /> Toluene 200 6600 <br /> Ethyl Benzene 200 1800 <br /> Xylenes (Total) 200 14000 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits% % Recovery <br /> TrifEuorotoluene 70 130 86 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> i <br /> SEQUDI NALYTICAL - ELAP #1210 <br /> Mark Cargasacchi <br /> Project Manager Page 6 <br />