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Sequoia680 Chcsapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Crcek CA 94598 (510) 988 9600 FAX(510)968 9673 <br /> Analytical 819 Striker Avenuc,Sulte 8 Sacramento CA 95834 (916) 921 94500 FAX(916)921 0100 <br /> Gettler Ryan Geostrategies Client Prod ID Tosco 6981, 140124 02 Sampled 03/25/98 <br /> 6747 Sierra Court Suite J Sample Descrlpt Eff Received 03/25/98 <br /> Dublin, CA 94568 Matrix AIR <br /> Analysis Method 8015Mod/8020 Analyzed 03/28/97 <br /> Attention Deanna Harding Lab Number 9803H24-02 Reported 04f01./98 <br /> aC Batch Number GC032898BTEX03A <br /> Instrument ID GCHP03 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 10 15 <br /> Benzene 010 N D <br /> Toluene 010 N D <br /> Ethyl Benzene 010 N D <br /> Xylenes (Total) 0 10 0 21 <br /> Chromatogram Pattern <br /> Weathered Gas CS-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 83 <br /> 0 <br /> Anaiytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> 4 <br /> A <br /> Mry <br /> Pro�ec Manager Page 2 <br />