definiens: means ( a ) any or as designated, listed or defin ed ( whether expressly or by reference ) in any Environmental Law ; ( b ) any other pollutant, chemical, substance, tox ic, infectious, carcinogenic, reactive, corrosive, igni table or flammable chemical, or chemical compound, or hazardous substance, material or waste, whether sol i d, liquid or gas, that is subject to regulation, c ontrol or remediation under any Environmental Laws, including any quantity of asbestos in any form, urea, formal dehyde, polychlorinated biphenyls ( PCBs ), radon gas, petrol eum, waste oil, crude oil, or any fraction thereof, all forms of natural gas, petroleum products or by - products or d erivatives ; and ( c ) any compound, mixture, solution, product or other substance or material that contains any ha zardous substance or material referred to in clause ( a ) and ( b ) above