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Sequoia 680 Chesapeake Dnve 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 /> �rill7 Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Gettler Ryan/Geostrategies Client Prod ID Unocal 4855 20/5981, Stockton Sampled 08/28/97 - <br /> 3164 Gold Camp Drive #240 Sample Descrlpt Eff Received 08/29/97 <br /> Rancho Cordova, CA 95670 Matrix AIR <br /> Analysis Method 8015Mod/8020 Analyzed 08/29/97 <br /> Attention Greg Gurss Lab Number 9708F33-01 Reported 09104197 <br /> QC Batch Number GC082997BTEX21A <br /> Instrument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Anafyte 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 0 61 <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trlfluorotoluene 70 130 88 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANAL AL - ELAP #1210 <br /> 'regory <br /> P ct Manager Page i <br />