The West Lake Landfill in St. Louis county has long-lasting radioactive wastes.

The Executive Director of Missouri Coalition for the Environment, Kat Logan Smith, says the landfill poses a serious threat.

She charged the Environmental Protection Agency with not doing a good job cleaning it up.

The Environmental Protection Agency has plans to cover the West Lake landfill by putting a modern cap over it made of clay and vegetative layers.

The Executive Director from the Missouri Coalition for the Environment, Kat Logan Smith, says the cap is not a good idea.

She says it will cause long-term problems that need to be taken care of immediately.

Smith also says the likelihood the water will reach the Missouri River is 100 percent.

The EPA held several public meetings before making a decision.

They say this is the best way to handle the West Lake landfill.