The chemical weapons stockpile at Blue Grass Army Depot in Madison County passed an international inspection this week, according to a release from Blue Grass Chemical Activity.

The inspection team assured accountability of every chemical weapon declared to be in storage at the depot as part of the U.S. compliance with the Chemical Weapons Convention.

The team was made up of representatives from the United Kingdom, Ukraine, Russia, France, Serbia and Montenegro. They were escorted by members of the U.S. Defense Threat Reduction Agency.

The U.S. originally signed the CWC treaty in 1997, agreeing to destroy all of its chemical weapons and former production facilities as well as halt the development, use, production and acquisition of chemical weapons.