Pantex Plant (USDOE)

Overview

Pantex Plant sits about 17 miles northeast of Amarillo, Texas. It is an active Department of Energy nuclear weapons facility covering 16,000 acres. The federal government owns 10,000 of those acres, and Texas Tech University leases the remaining 6,000 as a safety buffer. The site is listed on the National Priorities List under the Superfund program, with the EPA serving as the lead regulatory agency.

Contamination at the site includes explosive compounds such as TNT, RDX, and HMX, along with chlorinated solvents including trichloroethene, tetrachloroethene, and 1,2-dichloroethane. Groundwater is the most widely affected medium, carrying those compounds plus boron, chromium, chromium(VI), chloroform, perchlorate, 1,4-dioxane, dinitrotoluene compounds, and trinitrobenzene. Soil contamination involves TNT, RDX, and uranium isotopes uranium-235 and uranium-238. The EPA evaluated exposure pathways for people and ecological resources before designating all of these as contaminants requiring cleanup.

A formal remedial investigation began in May 1991. A feasibility study wrapped up in April 2008, and the final cleanup remedy was selected on September 25, 2008. Construction of the remedy finished in July 2009, and the full remedial action phase was complete by August 2010. The remedy covers 47 contaminated soil units and perched groundwater. Soil treatments include vapor extraction, containment, engineered covers, and access restrictions. Four groundwater treatment systems are running: the Playa 1 and Southeast Pump-and-Treat Systems, plus two in-situ bioremediation systems in the Southeast and Zone 11 areas. A 2022 Explanation of Significant Differences updated the remedy to address changes in treatment areas, monitoring requirements, remedy elements, cleanup standards, and institutional controls.

The most recent five-year review, completed September 7, 2023, confirmed that all soil remedies are working as designed and are protective of human health and the environment in the short term. Human exposure is currently under control, with no unacceptable exposure pathways identified. However, contaminated groundwater migration is not stabilized. Additional remedial investigation work is underway and is estimated to finish between January and March 2028, with a follow-on feasibility study estimated between November 2027 and January 2028. The site has not been deleted from the National Priorities List and has not achieved sitewide ready for anticipated reuse status.

Community members can stay involved in several ways. The U.S. Department of Energy and National Nuclear Security Administration hold public meetings twice a year, typically in May and November. Environmental reports and restoration documents are available at the Carson County Library in Panhandle and the Amarillo Public Library Downtown Branch. For questions, residents can contact the EPA Community Involvement Coordinator or Remedial Project Manager, the Texas Commission on Environmental Quality representative, or the Department of Energy facility contact.