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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (495) 364-9600 FAX(415) 364 9233 <br /> Vl0404 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 Prol ID Chevron 9-8264/8264-1 Sampled 11/07/95 <br /> 6280 Stoneridge Mall Rd B211 Sample Descript TB2 Received 11/08/95 <br /> Pleasanton, CA 94588 Matrix SOLID Extracted 11/10/95 <br /> Analysis Method 8015Mod/8020 Analyzed 11/10/95 <br /> Attention Ann Marie Dockstader Lab Number 9511587-16 _ Reported 11116195 <br /> QC Batch Number GC111095BTEXEXA - <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 100 830 <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 3 8 <br /> Xylenes (Total) 050 3 9 <br /> Chromatogram Pattern <br /> Weathered Gas C6-C12 <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 131 Q <br /> Analytes reported as N D were not present above the stated lima of detection <br /> SEQU7 ANALYTICAL - ELAP #1210 <br /> Mark Cargasacchi <br /> Project Manager Page 24 <br />