11.5 square miles of the Rocky Mountain Arsenal northeast of Denver have been removed from the Superfund National Priorities List and can now be added to the Rocky Mountain Arsenal National Wildlife Refuge, more than doubling its size to about 19 square miles.
The U.S. Environmental Protection Agency and state officials have determined that all the cleanup work necessary to protect public health and the environment is complete for the 7,396-acre Internal Parcel. The cleanup activities also included the removal or destruction of 196 structures and the closure of 27 groundwater wells.
The Rocky Mountain Arsenal was established in 1942 by the Army to manufacture chemicals for industrial, agricultural and military uses. Shell Oil Co. manufactured pesticides at the site from 1952 to 1982.