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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364 9233 <br /> 404 N WlSet Lane Walnut Creek CA 94598 (925)988 9600 FAX(9Z5)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)9Z1 0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792 1865 FAX(707)792 0342 <br /> 1551 Industrial Road San Carlos,CA 94070-4111 (650)232 9600 FAX(650)232 9612 <br /> Gettler Ryan1Geostrategies Client Prol 1D Tosco 6981 4707 Pacific Ave Sampdad 02/01/99 - <br /> 6747 Sierra Court Suite J Sample Descript Eff Rme1vo 02/02/9.9 <br /> Dublin, CA 94568 Matrix AIR <br /> Analysis Method 6015Mod/6020 Analyzed 02/02/99 <br /> Attention Deanna Harding Lab Number 9902059-01 Reported 02/17199 <br /> OC Batch Number GCO20299BTEX17A <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 10 47 <br /> Benzene 010 N D <br /> Toluene 010 N D <br /> Ethyl Benzene 010 N D <br /> Xylenes (Total) 010 025 <br /> Chromatogram Pattern <br /> Unidentified HC >C8 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 97 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Project Manager Page 1 <br />