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PEO ACWA
- Program Executive Office, Assembled Chemical Weapons Alternatives (PEO ACWA)
  
  Mission: Destroy Chemical Weapons Stockpile
  
  Vision: Chemical Weapons Free by 2023
- About PEO ACWA
- PEO ACWA Media Library
BLUE GRASS
- Blue Grass Chemical Agent-Destruction Pilot Plant (BGCAPP)
  
  BGCAPP is safely destroying the chemical weapons stockpile currently in storage at the Blue Grass Army Depot near Richmond, Kentucky.
- BGCAPP Homepage
- BGCAPP Media Library
PUEBLO
- Pueblo Chemical Agent-Destruction Pilot Plant (PCAPP)
  
  PCAPP is safely destroying the chemical weapons stockpile currently in storage at the U.S. Army Pueblo Chemical Depot in Colorado.
- PCAPP Homepage
- PCAPP Media Library
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The U.S. Army Pueblo Chemical Depot originally stored more than 2,600 tons of the blister agent mustard in projectiles and mortar rounds.

Storage igloos at The U.S. Army Pueblo Chemical Depot

155mm Projectiles

105mm Projectiles

4.2-inch Mortar Rounds

155mm Projectiles

The 155mm projectile is a World War II-type munition. Both the M104 and M110 projectiles contain approximately 12 lbs. of blister (mustard) agent. Colored bands, signifying the chemical agent contained in the munition, mark the outside of the projectile casings. The shell contains an adapter and burster casing that screw into the nose of the shell, also allowing a fuze to be screwed into the nose of the projectile.

105mm Projectiles

The 105mm projectile is a World War II-type munition. The projectile contains approximately 3 lbs. of blister (mustard) agent. Colored bands, signifying the chemical agent within the munition, mark the outside of the projectile casings. The shell contains an adapter and booster casing that screw into the nose of the shell, allowing a fuze to be screwed into the nose of the projectile.

4.2-inch Mortar Rounds

The 4.2-inch mortar round, produced in the United States, consists of a one-piece forged steel-case projectile body with fuze, burster and tail assembly. Each munition contains approximately 6 lbs. of agent that is sealed inside with a steel burster well. The shell contains a perforated vane assembly welded to the inside of the body, designed to accommodate the burster tube extending from the fuze. The tail assembly consists of a pressure plate and rotating disk, propelling charge, cartridge container, ignition cartridge and striker nut assembly.

PCAPP is safely destroying the stockpile of chemical weapons in storage at the U.S. Army Pueblo Chemical Depot in Colorado.

Pueblo Chemical Agent-Destruction Pilot Plant (PCAPP)

*Employment and payroll figures as of 31 August 2020; Quantity Destroyed as of 18 September 2020.

Chemical Weapons Destruction Technologies

Technologies chosen to safely destroy the Pueblo stockpile.

Neutralization Followed by Biotreatment

The Assembled Chemical Weapons Alternatives program, the U.S. Army Pueblo Chemical Depot and the community worked together to select neutralization followed by biotreatment to destroy the chemical weapons stored at the depot.

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Explosive Destruction System

The Explosive Destruction System, or EDS, augmented the pilot plant to destroy a number of problematic munitions that could not be easily destroyed by the main plant’s automated equipment. During two campaigns from March 2015 to December 2018, the EDS eliminated 951 items resulting in 3.82 tons of mustard agent destroyed.

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Static Detonation Chamber

Three Static Detonation Chamber (SDC) units will augment the main plant by destroying all problematic munitions, including the 4.2-inch mortar rounds. PCAPP will employ three SDCs, each consisting of two units — the detonation chamber and the off-gas treatment system. The SDCs are expected to be operational by the end of 2020.

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Upcoming Meetings

Due to COVID-19, future public meetings will not be held in person until further notice. Please check back soon for additional information.

Colorado Citizens’ Advisory Commission, Permitting Working Group and Biotreatment Utilization Group Meetings will be held online on Sept. 30, 2020, as noted below. (The meeting will open at 1 p.m. for those needing assistance.)

2 p.m. – Public Meeting – Modifications to the (B05) Spent Decontamination System Design
2:30 p.m. – Permitting Working Group/Biotreatment Utilization Group
3 p.m. – Colorado Citizens’ Advisory Commission

There are two ways to join this Google Meet event:

Computer: meet.google.com/uzf-oveo-bfk
Phone: 1 (484) 552-3189 PIN: ‪382 515 843#

For information, please contact the Pueblo Chemical Stockpile Outreach Office at (719) 546-0400, or pueblooutreach@iem.com