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,!ZN <br /> 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) 989 9673 <br /> VIWOF Analytical 819 Sinker Avenue,Suite 8 Sacramento, CA 95834 (916) 92t 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 8211 Sample Descript P-9 Received 11/08/95 <br /> Pleasanton, CA 94588 Matrix SOLID Extracted 11/08/95 <br /> Analysis Method 8015Mod/8020 Analyzed 11/09/95 <br /> Attention Ann Marie Dockstader Lab Number 9511554-03 _ Reported 11J13J95 <br /> QC Batch Number GC110895BTEXEXB " <br /> Instrument ID GCHP18 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TPPH as Gas 10 12 <br /> Benzene 00050 0 068 <br /> Toluene 00050 N D <br /> Ethyl Benzene 00050 0 070 <br /> Xylenes (Total) 00050 0 050 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 99 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> 6/ <br /> Mark Cargasacchi <br /> Project Manager Page 4 <br />