A group of refiners and petrochemical companies has agreed to pay $120 million for cleaning up a contaminated dump site in Texas, the U.S. Justice Department announced last week. The second-largest settlement in the history of the federal environmental Superfund program will go to the U.S. government and the State of Texas to cover their cleanup costs. The firms accused of wrongdoing include Exxon Mobil, Shell Oil Co., Phillips Petroleum and BP-owned Atlantic Richfield, Goodyear Tire & Rubber Co., Occidental Chemical Corp., the El Paso Group and Rohm & Haas, a provider of specialty chemicals.