Pueblo Chemical Agent-Destruction Pilot Plant Monthly Recap – June 2024

Current Project Phase:

Chemical Weapons Destruction at the Pueblo Chemical Agent-Destruction Pilot Plant (PCAPP):

The Pueblo Chemical Agent-Destruction Pilot Plant (PCAPP) completed destruction of the U.S. chemical weapons stockpile previously stored at the U.S. Army Pueblo Chemical Depot (PCD) in Colorado on June 22, 2023. The stockpile consisted of 780,089 chemical weapons containing 2,613 U.S. tons of mustard agent.

The Pueblo Chemical Agent-Destruction Pilot Plant (PCAPP) is in the closure phase, which will take approximately three years. Plant closure involves the decontamination and decommissioning of facilities and equipment, disposition of property, demolition of facilities not required for future U.S. Army use, and closure of government contracts and environmental permits in accordance with laws and regulations.

The safety of the workforce, community and environment continues to be the plant’s highest priority during the closure phase.


Project Update:

  • On June 22, PCAPP recognized the one-year anniversary of the end of destruction of the chemical weapons stockpile in Colorado.
  • Representatives of the Centers for Disease Control and Prevention visited the plant for the annual laboratory and monitoring review.
  • Between Jan. 1 and June 23, more than 175,000 pounds of contaminated closure waste was shipped to hazardous waste facilities in Deer Trail, Colorado, and near Port Arthur, Texas.
  • More than 200 PCAPP and PCD employees attended a job fair with representatives from other Bechtel, Amentum and Battelle projects and local industrial park companies.

Main Plant:

  • The Biotreatment Area officially ceased operations June 20. Workers are clearing out and starting to dismantle the system.
  • The plant received state approval of a Temporary Authorization to replumb agent piping to mechanically isolate the systems that are no longer needed for treatment of agent from munitions, while awaiting approval of the full permit modification request.
  • Workers are conducting Unventilated Monitoring Tests in the Explosive Containment Rooms and installating six chemical agent air-monitoring systems in areas of the plant for worker safety during the closure phase.
  • The industrial operations boilers will be shut down as they are too large to support closure requirements. Temporary boilers will be installed to maintain building heat and support remaining decontamination needs.
  • Routine maintenance through Demilitarization Protective Ensemble entries continues, as does waste management and general housekeeping.

Static Detonation Chambers (SDC):

  • The closure plan for the SDC complex remains under review by state regulators.
  • Government representatives visited the plant to begin discussions and planning for transporting the SDC units to their new locations at Army installations in Maryland and Alabama. The disassembly process should take about three months.
  • Limited activity is occurring at the SDC complex, which continues to undergo routine maintenance, waste management and general housekeeping with minimal staffing.

Closure-related Activities:

  • The Pueblo Workforce Center continues to host Transition Help Tuesdays at PCAPP. One-on-one sessions are offered to employees, providing guidance and information for employment transition, including resume review, workshops, access to LinkedIn Learning and career coaching programming. Interview and resume workshops continued to be offered in February.

Upcoming Meetings

  • The next Colorado Chemical Demilitarization Citizens’ Advisory Commission meetings will be online at 3 p.m. MT on Aug. 28.

    Individuals interested in joining online can participate using the link and information below.

    Computer: Zoom
    Phone: 1 (719) 359-4580
    Meeting ID:  844 3279 1550#

New to PCAPP?

The Pueblo Chemical Agent-Destruction Pilot Plant, or PCAPP, was built to destroy the chemical weapons stockpile formerly stored at PCD. This video portrays PCAPP operations prior to the June 22, 2023, completion of destruction of the stockpile in Colorado. The main plant used neutralization followed by biotreatment and was supplemented by Static Detonation Chamber units to destroy mustard agent munitions. With destruction operations complete, the safety of the workforce, neighboring communities and the environment during the closure phase remains the project’s priority.

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