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Sequoia 680 ChesapeakeLa Drive Redwood City CA 94 (650)364-9600 FAX(650)354-9233 <br /> 404 N WlgctLane Walnut Creek CA 4459898 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Straker Avenue Suite 8 Sacramento CA 95834 (916}921-9600 FAX{916}921-0100 <br /> 1455 McDowell Blvd North Ste D retalurna CA 94954 (707)792-1865 FAX(707)792-0342 <br /> • <br /> Gettler Ryan/Geostrategies Client Prol- ID- Unocal SS#5886/2701�W March Sampled 09/01/98 <br /> 6747 Sierra Court Suite J Sample Descrlpt MW-1 Received 09/02/98 = <br /> ' Dublin, CA 94568 Matrix LIQUID <br /> _ Analysis Method 8015Mod/8020 Analyzed 09/08/98 <br /> Attention Deanna Harding Lab Number 9809049-02 Reported 10/01198 <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 50 N D <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 050 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene 0 50 N D <br /> Xyienes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoiuene 70 130 93 <br /> • <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1849 <br /> 05dGranlcher <br /> project Manager Page 4 <br />