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• diesel, oil and gasoline (TPHg, TPHd and TPHo) by EPA Method 8015 These groundwater <br />• samples were also analyzed for benzene, toluene, ethyl benzene and total xylenes (BTEX) by <br /> EPA Method 8020, and Methyl tert-Butyl Ether (MTBE)/oxygenates [di-isopropyl ether (RIPE), <br /> ethyl-t-butyl ether (ETBE), tert-amyl methyl ether (TAME), t-butanol (TBA)] by EPA Method <br /> 8260 <br /> 3.3 Floating Oil <br />. Floating oil has been removed from MW-2 periodically, starting in January 2000 as follows <br />• Date Quantity <br /> 27 January 2000 1 gal <br /> 16 February 2000 1 gal <br /> 17 March 2000 0 5 gal <br />• 07 April 2000 0 5 cup <br />. 20 April 2000 1 cup <br /> 31 May 2000 2 cups <br /> 11 July 2000 3 cups <br /> 26 July 2000 3 cups <br /> 28 September 2000 1 gal <br /> 07 November 2000 1 gal <br />• 21 November 2000 2 5 gal <br /> Total 8.25 gal. <br /> 4.0 DISCUSSION <br /> 4.9 MW-4 <br /> Groundwater from MW-4 shows significant contamination from gasoline, oxygenates and <br /> BTEX It is free of diesel and motor oil contamination, indicating that MW-4 has not been <br /> affected by contamination from the former diesel and used oil USTs The source of the gasoline <br /> contamination is unknown at this time <br />. Environeenng,Inc Project No 01-00109 Page 8 <br />