definiens: means ( a ) any or as designated, list ed or defined ( whether expressly or by reference ) in any Environmental Law ; ( b ) any other pollutant, chemica l, substance, toxic, infectious, carcinogenic, reactiv e, corrosive, ignitable or flammable chemical, or c hemical compound, or hazardous substance, material or waste, whether solid, liquid or gas, that is subject to regulation, control or remediation under any Environmental Laws, including any quantity of asbestos in any form, u rea, formaldehyde, polychlorinated biphenyls ( PCBs ), rad on gas, petroleum, waste oil, crude oil, or any fra ction thereof, all forms of natural gas, petroleum produc ts or by - products or derivatives ; and ( c ) any compo und, mixture, solution, product or other substance or ma terial that contains any hazardous substance or mat erial referred to in clause ( a ) and ( b ) above