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Sequoia 680 Chesapeake Drive Redwood Gty,CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Viget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> Analytical 819 Stnker Avenue,Swte 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921-0100 <br /> Ged Ryan�Geostrategies --"-�Cllent Prol ID- -Unocal SS#5886- — - __--—- " Sampled 03/25/98 <br /> 6 47 Sierra Court Suite J Sample Descript MW-4D Received 03/25/98 _ <br /> Dublin, CA 94568 Matrix LIQUID Extracted 03/27/98 _ <br /> Analysis Method EPA 8015 Mod Analyzed 03/31/98 <br /> wAttention_Deanna Harding " Lab Number 9803G82-05 Reported 04f08J98 <br /> QC Batch Number GC0327980HBPEX6 <br /> Instrument ID GCHP19A <br /> Total Extractable Petroleum Hydrocarbons (TEPH) with Silica Gel Cleanup <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TEPH as Diesel 50 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> n-Pentacosane (C25) 50 150 62 <br /> Anafytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> ory <br /> Manager <br /> Page 12 <br />