Umatilla Chemical Agent Disposal Facility

Umatilla Chemical Agent Disposal Facility
Name	Umatilla Chemical Agent Disposal Facility
Location	Umatilla County, Oregon, Hermiston, Oregon
Built	1988
Opened	1989
Closed	2011
Owner	United States Army
Operator	Umatilla Chemical Depot
Site area	5450acre

Umatilla Chemical Agent Disposal Facility was a chemical weapons disposal installation located adjacent to the Umatilla Chemical Depot near Hermiston, Oregon in Umatilla County, Oregon. It was established under federal law to implement the Chemical Weapons Disposal Program mandated by the United States Congress and executed by the United States Army Chemical Materials Agency with assistance from the Bechtel National, Inc. and contractor teams. The facility was part of national and international efforts connected to the Chemical Weapons Convention and the Organisation for the Prohibition of Chemical Weapons to eliminate legacy stockpiles of chemical munitions held since World War II and the Cold War.

History

Construction and planning were driven by directives from the Department of Defense and oversight by the Environmental Protection Agency (United States), following decades of storage at the Umatilla Chemical Depot established after World War II. Community involvement included consultations with the State of Oregon executive offices, the Oregon Department of Environmental Quality, and local governments in Hermiston, Oregon and Pendleton, Oregon. The facility’s timeline intersects with national incidents and policies such as the implementation of the National Environmental Policy Act processes, responses to public interest groups like Citizens Against Chemical Weapons, and technical reviews by the National Research Council (United States) and the General Accounting Office (now Government Accountability Office). Major construction contracts were awarded in the late 1980s and early 1990s amid debates influenced by cases like the Tooele Chemical Agent Disposal Facility and the closure of the Edgewood Chemical Activity.

Facility and Operations

The treatment complex comprised a main processing plant, storage and handling areas, monitoring stations, and waste treatment systems designed to comply with standards from the Occupational Safety and Health Administration, Department of Transportation (United States), and Nuclear Regulatory Commission-style oversight frameworks adapted by the Army. The plant used neutralization followed by biotreatment and thermal treatment components similar to systems employed at facilities such as Pine Bluff Chemical Agent Disposal Facility and Anniston Chemical Agent Disposal Facility. Operational links included coordination with the Federal Emergency Management Agency for emergency planning and the Centers for Disease Control and Prevention for medical readiness, while contractors included EG&G-type firms and engineering teams with ties to Atomic Energy Commission-era expertise. Security and transport involved the United States Army Reserve and regulatory alignment with the Department of Homeland Security after its creation.

Chemical Agents and Munitions Destroyed

The facility processed thousands of munitions containing agents related to programs dating from World War II and the Korean War. Principal agents destroyed included mustard agent (sulfur mustard) munitions similar to those stockpiled at Johnston Atoll Chemical Agent Disposal System and sarin-like compounds associated in policy discussions with the Berlin Chemical Weapons Convention era. Specific munitions types paralleled inventories reported for sites like Blue Grass Army Depot and the Kansas Army Ammunition Plant inventories, encompassing artillery shells, rocket warheads, and bulk containers. Destruction operations adhered to protocols developed from lessons at the Anvil Point trials and guidance from the United Kingdom Chemical Weapons Destruction experience.

Environmental and Health Monitoring

Environmental monitoring programs were coordinated among the Environmental Protection Agency (United States), the Oregon Health Authority, the Agency for Toxic Substances and Disease Registry, and the Army’s public health units. Monitoring included air sampling, groundwater surveillance, and biotic monitoring drawing on methods endorsed by the National Oceanic and Atmospheric Administration, the U.S. Geological Survey, and the National Institutes of Health. Public health outreach involved clinics aligned with the Centers for Disease Control and Prevention guidance and interaction with American Red Cross disaster preparedness programs. Independent reviews were performed by panels convened by the National Academy of Sciences and state-level scientific advisory boards.

Closure and Demilitarization Efforts

Closure activities were part of broader demilitarization commitments to the Chemical Weapons Convention and coordinated with the Organisation for the Prohibition of Chemical Weapons. Demilitarization included decontamination, dismantlement of processing equipment, soil remediation, and monitoring consistent with standards used at Johnston Atoll Chemical Agent Disposal System and other closure projects like Tooele Army Depot transitions. Funding and oversight drew on appropriations from the United States Congress and implementation by the Army Corps of Engineers and contractors experienced in base realignment and closure processes such as those overseen by the Base Realignment and Closure Commission. Final site transfer planning involved the Bureau of Land Management and state land agencies.

Controversy and Community Response

Local and national advocacy groups, including environmental organizations like the Sierra Club and citizen coalitions comparable to Oregon Physicians for Social Responsibility, raised concerns about safety, environmental impact, and long-term land use, echoing debates seen at Chemical weapons disposal protests nationwide. Legal challenges and public hearings involved state courts, the United States District Court for the District of Oregon, and participation by elected officials from the Oregon Legislative Assembly and members of the United States Congress representing Oregon's 2nd congressional district. Media coverage included outlets such as The Oregonian and national reporting by organizations similar to National Public Radio and the Associated Press, fueling regional discourse on risk, compensation, and remediation standards.

Category:Chemical weapons destruction facilities Category:Umatilla County, Oregon Category:United States Army installations