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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walcott Creek CA 94598 (510) 988 9600 FAX(510)986 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(9 16)921 0100 <br /> Iwo <br /> Gettler Ryan/Geostrategies Client Prof ID Unocal 4855 18 Sampled 01/26/98 <br /> 3164 Gold Camp Drive #240 Sample Descript lnf 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 E46-01 Reported 01 f30J98 <br /> QC Batch Number GC01 2898BTEX21 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 500 1300 <br /> Benzene 5 0 N D <br /> Toluene 5 0 N D <br /> Ethyl Benzene 5 0 10 <br /> Xylenes (Total) 5 0 <br /> Chromatogram Pattern C8 <br /> Weathered Gas <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 96 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> l <br /> �io <br /> Pro ect nager Page 1 <br />