definiens: ) any Hazardous Materials ( as hereinafter defined ) on, from or affe cting any Property ( as hereinafter defined ) in any manner or by any means in violation of any Environmental Laws and to the best of the Company 's knowledge and belief after due investigation, there is no threat of such Relea se . As used herein, the term shall include, without limitation, land, buildings and laboratory facilities owned or leased by the Company or as to which the Company now has any duties, responsibilities ( for cleanup, remedy or ot herwise ) or liabilities under any Environmental Laws, or as to which the Company or any subsidiary of the Company may have such duties, responsibilities or l iabilities because of past acts or omissions of the Company or any such subsid iary or their predecessors, or because the Company or any such subsidiary or th eir predecessors in the past was such an owner or operator of, or bore some othe r relationship with, such land, buildings or laboratory facilities . The term shall include, without limitation, any flammable explosiv es, petroleum products, petroleum by - products, radioactive materials, hazar dous wastes, hazardous substances, toxic substances or related materials a s defined by Environmental Laws