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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wget lane Walnut Creels CA 94598 (510)988-9600 FAX(510)988-9673 <br /> Analtical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Y1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707) 792-1865 FAX(707)792-0342 <br /> i <br /> Gettler Ryan/Geostrategies Client Prod ID Unocal 5421, Stockton Sampled 04/15/98 <br /> 6747 Sierra Court Suite J Sample Descrlpt1-11 Received 04/16/98 <br /> Dublin, CA 94568 Matrix SOLID t lr_ Extracted 04/16/98 <br /> Analysis Method EPA 8015 Mod Analyzed 04/17/98 <br /> „ Attention Clyde Galantine Lab Number 9804Al2-01 Reported 04/17J98 <br /> QC Batch Number GC0416980HBPEXB <br /> Instrument ID GCHP4A <br /> Total Extractable Petroleum Hydrocarbons (TEPH) <br /> Analyte Detection Limit Sample Results <br /> mg/K5 mg/Kg <br /> TEPH as Diesel 1 0 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> n-Pentacosane (C25) 50 150 84 <br /> • <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA A AL"CAL - ELAP 01210 <br /> egory <br /> Project Manager <br /> Page 3 <br />