DIXIE CAVERNS COUNTY LANDFILL
On this page:
- What Is Being Done to Clean Up the Site?
- What Is the Current Site Status?
- EPA’s Involvement at the Site
- Operable Units (opens new page)
- Cleanup Progress (opens new page)
The 39-acre Dixie Caverns County Landfill site is located in Salem, Virginia. Roanoke County operated the unlicensed municipal landfill from 1965 until its closure in 1976. During operation, the landfill accepted municipal and industrial wastes. Site activities contaminated soil and sediment with hazardous chemicals. Following cleanup, operation and maintenance activities are ongoing. EPA took the site off the Superfund program’s National Priorities List in 2001.
What Is Being Done to Clean Up the Site?
EPA has conducted several five-year reviews of the site’s remedy. These reviews ensure that the remedies put in place protect public health and the environment, and function as intended by site decision documents. The most recent review concluded that response actions at the site are in accordance with the remedy selected by EPA and that the remedy continues to be protective of human health and the environment in the short term. Continued protectiveness of the remedy requires an ecological health assessment.
What Is the Current Site Status?
The Site was deleted from the National Priorities List in 2001, as all cleanup actions have been completed. Operation and maintenance activities are ongoing. Institutional Controls were enacted in 2013 to ensure that the stabilized waste left in the landfill is not disturbed. The most current Five Year Review Report may be found here.
EPA’s Involvement at the Site
In June 1983, EPA conducted a preliminary assessment of the site and observed four potential sources of hazardous waste contamination, a drum disposal area, a sludge pit, a fly ash pile, and an area of uncontrolled runoff from the site entering a nearby stream. Roanoke County signed a Consent Agreement and Order with EPA to conduct a removal action for the discarded drum area and the sludge pit. In 1991 a Record of Decision (ROD) was issued that selected excavation and high temperature metals recovery treatment at a permitted facility to address the 9,000 cubic yard fly ash pile. EPA negotiated an agreement with the responsible parties to implement the selected remedy. By having the responsible parties implement the remedy EPA saved an estimated $4,000,000 in trust fund money. This response action was completed in 1995.
In a final response action for the site, EPA and the responsible parties signed an Administrative Order on Consent for Removal Action to excavate, treat and dispose of the contaminated stream sediments. The contaminated sediments were treated and stabilized to neutralize the contaminated waste and disposed in a landfill constructed on site. This response action was successfully completed in the summer 1997. In January 2013, Institutional Controls were implemented at the Site to ensure that the stabilized waste left in the landfill is not disturbed.
The site was deleted from the National Priorities List in 2001, as all actions have been completed. Five Year Reviews will continue to be conducted to ensure that the remedy is functioning properly and is protective.
EPA is currently preparing the third five-year review report for the site.
During cleanup, a site can be divided into a number of distinct areas depending on its complexity. These areas, called operable units (OUs), may address geographic areas, specific problems, or areas where a specific action is required. Examples of typical operable units include construction of a groundwater pump and treatment system or construction of a cap over a landfill.