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t <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Iwo Analytical 819 Striker Avenue Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Gettler Ryan/Geostrategles Client Prof ID Tosco 6981, 140124 02 Sampled 02/27/98 <br /> 6747 Sierra court Suite J Sample Descript Inf Received 02/27/98 <br /> Dublin, CA 94568 Matrix AIR <br /> Analysis Method 8015Mod/8020 Analyzed 02/28/98 <br /> Attention Steve Carter Lab Number 9802153-01 Reported 03J03198 <br /> QC Batch Number GCO22898BTEX03A <br /> Instrument ID GCHP3 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 250 1900 <br /> Benzene 2 5 N D <br /> Toluene 2 5 3 8 <br /> Ethyl Benzene 2.5 18 <br /> Xylenes (Total) 2 5 95 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 100 <br /> I <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> ,r <br /> gory <br /> Project Manager Page 1 <br />