Tooele Chemical Agent Disposal Facility The Tooele Chemical Agent Disposal Facility ( also called Tooele Chemical Demilitarization Facility ) or TOCDF , is a U . S . Army facility located at Deseret Chemical Depot in Tooele County , Utah that was used for dismantling chemical weapon s . Destruction is a requirement under the Chemical Weapons Convention and is monitored by the Organisation for the Prohibition of Chemical Weapons . Deseret Chemical Depot held 44 % of the nation ' s chemical stockpile processing began , and it had held some of these chemical munitions since 1942 . TOCDF was constructed in the early 1990s and began destruction of chemical agent - filled munitions on 22 August 1996 . As of September 2011 , the facility had processed 99 % of its stockpile . TOCDF processed all of its VX , Sarin and mustard gas at its main facility ; a smaller incinerator was installed west of the main plant in order to dispose of Lewisite - filled containers . In advance of plant closing , two ponds were revitalized and the surrounded area reseeded as well as 29 miles of railroad being removed ( out of 40 - miles of rail in Deseret ) . Disposal of all chemical weapons concluded on 21 January 2012 . It was the last depot to complete its disposal operations under the U . S . Army Chemical Materials Agency ; although two other depots still store chemical weapons to be destroyed by another Army program . GB campaign . Each of the weapons listed contained Sarin ( GB ) All sarin ( 6 , 045 . 26 tons ) was disposed of by March 2002 . VX campaign . After completion of the GB campaigns , the plant was converted to dispose of similar weapons containing VX agent : All VX ( 1 , 356 . 32 tons ) was disposed of by 3 June 2005 . Processing of VX - contaminated containers was completed in October 2005 . Mustard Agent campaign . After VX processing was completed , the plant was reconfigured to process chemical weapons containing mustard gas , also called mustard agent or H or HD or HT . Operations to destroy mustard gas weapons were completed on 21 January 2012 . Weapons disposal process . The destruction process involves receiving the items in protective containers from a covered , protected storage area , and placing the items onto trays for insertion into the automated processing area . Inside the first automated area , the Explosion Containment Room , explosive components are removed from the items and destroyed in a rotating kiln called the Deactivation Furnace System . The items then are carried on automated cars to another room , called the Munition Processing Bay , where automated machinery sucks the liquid agent out . The liquid is sent to holding tanks . The nearly - empty items are then moved to the lower level on an automated lift , and introduced into a high - temperature ( maximum 2 , 000 °F or 1 , 100 °C ) oven called the Metal Parts Furnace , which destroys the residual agent so that the containers can be safely disposed of as scrap metal . The liquid agent is destroyed in one of two high - temperature ( maximum 2 , 700 °F or 1 , 500 °C ) ovens called Liquid Incinerators . The products of combustion from the ovens and kilns pass through extensive Pollution Abatement Systems , which catch the airborne products as salts , and hold them in a liquid slurry called brine , which is periodically shipped to out - of - state underground disposal facilities .