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4IN <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) 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 8211 Sample Descript SP-2 (A-D) Comp 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 9511553-02 Reported 11J13195 <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/K9 mg/K9 <br /> TPPH as Gas 20 170 <br /> Benzene 010 N D <br /> Toluene 010 N D <br /> Ethyl Benzene 0.10 022 <br /> Xylenes (Total) 0 10 <br /> 7 3 <br /> ChromatogramPattern <br /> Weathered Gas CS-C12 <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 80 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL. - ELAP #1210 <br /> Mark Cargasacchl <br /> Project Manager Page 4 <br />