“Hazardous Materials” shall mean (a) any petroleum or petroleum products, radioactive materials, asbestos and asbestos containing material, polychlorinated biphenyls, and radon gas; (b) any chemicals, materials or substances defined as or included in the definition of “hazardous substances,” “hazardous waste,” “hazardous materials,” “extremely hazardous waste,” “restricted hazardous waste,” “toxic substances,” “toxic pollutants,” “contaminants,” or “pollutants,” or words of similar import, under any applicable Environmental Law; and (c) any other chemical, material or substance, which is prohibited, limited, or regulated by any Environmental Law.
“Hazardous Materials” means any raw material, intermediate, product, byproduct, pollutant, contaminant, chemical, solvent, waste, preparation or any other substance or material (whether solid, semi-solid, liquid or gas) that is (a) defined as a “hazardous substance”, “toxic substance”, “hazardous waste”, “dangerous preparation”, “dangerous substance”, “substance of very high concern” or any other term of similar import under any Environmental Law, (b) infectious, carcinogenic, mutagenic, persistent, ignitable, corrosive, reactive, explosive, poisonous, toxic or otherwise hazardous or dangerous, or (c) listed, defined, designated, classified or otherwise regulated or controlled under, subject to, or that may form the basis for any Liability under any Environmental Law. The term Hazardous Materials includes petroleum and all byproducts and derivatives thereof, asbestos and asbestos-containing materials in any form or condition, radioactive materials and byproducts, urea-formaldehyde, lead and lead-based paint, polychlorinated biphenyls, and any other material or substance that is or that may present a threat to human health or the environment.
“Hazardous Materials” means (a) petroleum and petroleum products, byproducts or breakdown products, radioactive materials, asbestos-containing materials, polychlorinated biphenyls and radon gas and (b) any other chemicals, materials or substances designated, classified or regulated as hazardous or toxic or as a pollutant or contaminant under any Environmental Law.
“Hazardous Materials” means all explosive or radioactive substances or wastes and all hazardous or toxic substances, wastes or other pollutants, including petroleum or petroleum distillates, asbestos or asbestos containing materials, polychlorinated biphenyls, radon gas, infectious or medical wastes and all other substances or wastes of any nature regulated pursuant to any Environmental Law.
"Any substance that can threaten health, safety, and property being transported" (see full definition at The Law Dictionary).
"A number of terms (e.g., "hazardous chemicals," "hazardous materials," "hazardous waste," and similar nomenclature) refer to substances that are subject to regulation under one or more federal environmental laws. State laws and regulations also provide additional, similar, or identical terminology that may be confused with the federally defined terms. Many of these terms appear synonymous, and it is easy to use them interchangeably. However, in a regulatory context, inappropriate use of narrowly defined terms can lead to confusion about the substances referred to, the statutory provisions that apply, and the regulatory requirements for compliance under the applicable federal statutes."
Read more about 'Hazardous Terminology' in the U.S. Department of Energy's CERCLA Information Brief EH-231-003/0191, which provides regulatory definitions and references for the precise terminology that should be used when referring to "hazardous" substances regulated under federal environmental law.