definiens: means ( i ) those substances defined in or regulated under the following United Statesfederal statutes and their state counterparts, as each may be amended from time to time, and all regulationsthereunder : the Hazardous Materials Transportation Act, the Resource Conservation and Recovery Act, theComprehensive Environmental Response, Compensation and Liability Act, the Clean Water Act, the Safe DrinkingWater Act, the Atomic Energy Act, the Federal Insecticide, Fungicide, and Rodenticide Act and the Clean Air Act;(ii ) petroleum and petroleum products, including crude oil and any fractions thereof ; ( iii ) natural gas, synthetic gas, andany mixtures thereof ; ( iv ) polychlorinated biphenyls, asbestos and radon ; ( v ) any other contaminant ; and ( vi ) anysubstance, material or waste regulated by any Governmental Authority pursuant to any Environmental Law