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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 /> Analytical 819 Striker Avenue, Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916) 921 Ot00 <br /> 40 <br /> Gettler Ryan/Geostrategies Client Proj ID Chevron 9-1848, Manteca <br /> 3164 Gold Camp Drive #240 Sample Descript 81 Sampled 08/25/97 <br /> Rancho Cordova, CA 95670Matrix LIQUID Received 08/30/97 <br /> 't Analysis Method 8015Mod/8020 <br /> I!Attention Greg Gurss Lab Number 9709993_-09 Analyzed 09/19/97 <br /> _ Reported 10/27197 <br /> OC Batc_'h Number GC091997BTEX03A <br /> Instrument ID GCHP03 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit <br /> ug/L Sample Results <br /> TPPH as Gas ug/L <br /> Benzene 50 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Tota! 0 50 N D <br /> Chromatogram Pattern 0 50 N D <br /> Surrogates Control Limits % ° <br /> 1 <br /> Trifluorotoluene 70 Recovery <br /> 130 94 <br /> Analytes reported as N D were not present above the stated Ismit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> 4Manaqer <br /> Page g <br />