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Sequoia 680 Chesapeake Drive Rcdwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Crcck CA 94599 (5i0) 988 9600 FAX(510) 988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> o WO <br /> Gettler Ryan/Geostrategies Client Proj ID Unocal 4855 18 Sampled 01/26/98 <br /> 3164 Gold Camp Drive #240 Sample Descnpt Eff Received 01/27/98 <br /> Rancho Cordova, CA 95670 Matrix AIR <br /> Analysis Method 8015Mod/8020 Analyzed 01/28/98 <br /> Attention Steve Carter Lab Number 9801 E46-02 Reported 01(30[98 <br /> QC Batch Number GC012898BTEX21 A <br /> Instrument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 10 N D <br /> Benzene 010 N D <br /> Toluene 010 N D <br /> Ethyl Benzene 010 N D <br /> Xylenes (Total) 010 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Tnfluorotoluene 70 130 91 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOI-A ALYTICAL - ELAP #1210 <br /> egory <br /> Project Manager Page 2 <br />