The Umatilla Chemical Depot, (UMCD) based in Umatilla, Oregon, was a U.S. Army installation in the United States that stored chemical weapons. The chemical weapons originally stored at the depot consisted of various live munitions and storage containers each holding 1 short ton (2,000 lb; 910 kg) GB or VX nerve agents or HD blister agent. All munitions had been safely destroyed by 2011 and base closure operations are expected to be completed by 2018, after several years of delays.

Wikipedia