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(IN <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 /> VI0 Analytical 819 Straker Avenue,Suite a 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 Mail Rd 8211 Sample Descrlpt SP-3 (A-D) Comp Received 11/08/95 <br /> Pleasanton, CA 94588 Matrix SOLID Extracted 11/08/95 <br /> Analysis Method 8015Mod/8020 Analyzed 11/08/95 <br /> Attention Ann Marie Dockstader .-Lab Number 9511553-03 Reported 11113195 <br /> QC Batch Number GC110895BTExEX6' - -- - <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 10 10 <br /> Benzene 00050 N D <br /> Toluene 00050 N D <br /> Ethyl Benzene 00050 N D <br /> Xylenes (Total) 00050 0 038 <br /> Chromatogram Pattern <br /> Unidentified HC C10-C12+ <br /> Weathered Gas C8-C10 <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 88 <br />• <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUA A ANALYTICAL - ELAP #1210 <br /> Mark Cargasacchi <br /> Project Manager Page 6 <br />