Anniston Army Depot (ANAD) is a major United States Army facility for the production and repair of ground combat vehicles, overhaul of Small Arms Weapon Systems and the storage of chemical weapons, a.k.a. the Anniston Chemical Activity. The depot is located in Bynum, Alabama. The Department of the Army established the site in 1940, buying in Calhoun County, where Anniston is the county seat. The site was originally a munitions storage facility, and, later, a disposal facility. ANAD was placed on the Superfund National Priorities List in 1990 because of soil and groundwater contamination with antimony, chromium, lead, thallium and trichloroethylene. Geography The depot is located in Calhoun County, Alabama, west of Anniston. It covers of land, or . Its northern side is the Pelham Range portion of Fort McClellan. The central and northern portions of the depot span over and serve as an ammunition storage area. The southern side of the depot is the Southeastern Industrial Area (SIA), a industrial operations area with more than 50 buildings and a vehicle test track. Description As of 2014, the depot employs 3,800 civilian workers. Tanks and other equipment are repaired and tested, but historically Anniston's main role since World War II has been as a major munitions storage site. Anniston is one of seven depots in the United States where chemical weapons were stored (7.2% of nation's chemical weapons stockpile). The stockpile has included rockets, bombs, projectiles, and land mines armed with Sarin, VX nerve agent, or mustard gas. The last chemical munitions were destroyed in September 2011. ANAD is the only depot capable of performing maintenance on heavy-tracked combat vehicles and their components and houses a state of the art Small Arms Overhaul facility, which opened in January 2012 to replace an outdated facility. The depot is designated as the Center of Technical Excellence for the M1 Abrams Tank and is the designated candidate depot for the repair of the M60 Patton tank, AVLB (Armoured vehicle-launched bridge), M728 Combat Engineer Vehicle, M88 Recovery Vehicle and M551 'Sheridan' Armored Reconnaissance/Airborne Assault vehicles. During the Iraq War, over 1,000 M1 tanks, Howitzers, and other armored vehicles were stored awaiting re-engineering. ANAD is the Army's primary site for final assembly, reset, and overhaul for the Stryker family of wheeled fighting vehicles. All ten of the Stryker vehicle variants are assembled in the Nichols Industrial Park area by contractor General Dynamics − Land Systems.