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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 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)92i-9600 FAX(9t6)921-0[00 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Gettl er Ryan%Geostrategies Client Prol ID Unocal SS#0123 - �- -- -Sampled 09/28/98' <br /> 6747 Sierra Court Suite J Sample Descnpt U-2 Received 09/28/98 <br /> Dublin, CA 94568 Matrix LIQUID Extracted 09/30/98 ' <br /> Analysis Method EPA 8015 Mod Analyzed 10/09/98 <br /> Attention Deanna Harding _ Lab Number 9809H50-03 Reported 11j1 0198 <br /> QC Batch Number GCO930980HBPEXZ - -- - -- --- - - _ <br /> Instrument ID GCHP513 <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 81 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br />.111166 <br /> 1pGranlcher <br /> roject Manager Page t t <br />