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Sequoia 680 Chesapeake Drive Redwood C+tn 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 /> • !D- Analytical 819 Striker Avenue,Su3re 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921-0too <br /> 77 a. <br /> Gettler Ryan Geosirategies Client Prol ID Unocal SS#5886 Sampled 03/25/98 <br /> 6747 Sierra�ourt Su1te J Sample Descrlpt MW-3 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Received 03/25/98 m <br /> Analyses Method 8015Mod/8020 Analyzed 04/04/98 <br /> Attention Deanna Harding" =r - -Lab Number_ 9803G82-04 _ _ "r Reported 04J08198 <br /> QC Batch Number GC040498802009A- — '_- -- ---- --- ""-"—_--- ---- -- - -—-- =-_-_- <br /> Instrument 1D GCHP09 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L. ug/L <br /> TPPH as Gas 5000 N D <br /> Methyl t-Butyl Ether 250 8200 <br /> Benzene 50 N D <br /> Toluene 50 N D <br /> Ethyl Benzene 50 <br /> Xylenes (Total) 50 NDN D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % y <br /> % Recoverer <br /> Trifluorotoluene 70 130 <br /> ,analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1271 <br /> ory <br /> rojec Manager <br /> Page 10 <br />