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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364-9233 <br /> 4114 N Wiaet Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> Analytical 819 Stinker Avenue,Swte 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Gettler RyanyGeostrategies -- Client Proj ID Unocal SS#5886- - - - Sampled 03/25/98 <br /> 6747 Sierra Court Suite J Sample Descript MW-4S 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 /> Attention Deanna Harding Lab Number- 9803G82-06 Reported 04JO8198 <br /> QC Batch Number-GC0327980HBPEXB -- <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-Pen acosane (C25) 50 150 50 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 41210 <br /> AroectMan!ager <br /> Page 15 <br />