To add waste or change storage methods, companies must now meet exacting modern standards for the entire site - even if the old waste poses little threat.

Such waste can pose a grave "risk" to the country in terms of lost productivity and other problems, he said.

As such, these improperly disposed waste poses serious health implications to the people where it may have the potential of transmitting diseases.

The waste, which included benzene and other carcinogens, posed a risk to area residents, park visitors, wildlife and others.

Such wastes pose a serious threat to fish, waterfowl and many aquatic species.

The radioactive waste produced by nuclear plants has long posed a problem for their owners and the federal government.

Some beaches had to be closed because the waste posed threats of hepatitis and other diseases.

The country features many beaches, but sharks and toxic waste have historically posed dangers to potential tourists.

Those wastes, if not properly treated and disposed of, can pose risks to human health, welfare, and the environment.

Even though there is no longer chemical dumping, this waste and junk poses a continued risk to the community.