The
Umatilla Chemical Agent Disposal Facility is designed for the
destruction of the chemical weapons stored at the Umatilla Chemical Depot. The facility was completed in 2001. The Army began weapons disposal on September 8, 2004, and completed disposal on October 25, 2011. Destruction is a requirement under the
Chemical Weapons Convention and monitored by the
OPCW. The facility destroyed 220,604 munitions and containers containing of
GB,
HD and
VX via high-temperature incineration, representing 100 percent of the base's stockpile. While destroying 50% of its stockpile took six years (until August 2010), the processing of the second 50% was expected to take only two years. The process is simplified by having only containers of HD remaining to be processed while multiple kinds of individual munitions containing several agents were destroyed early in the campaign. An emphasis on risk reduction prioritised destruction of the most modern and dangerous compounds (VX and GB) and destruction of smaller containers, which had greater risk of theft, explosion, and leakage.
Public participation and outreach The Oregon Citizens' Advisory Commission, whose members include area residents appointed by the
Governor, is a focal point for public participation in the Army's weapons storage and disposal program in Umatilla. ==Closure and redevelopment==