Workers expect this week to move the last of the 105 mm projectiles filled with the deadly nerve agent, also known as GB, from their storage igloos at Anniston Army Depot to the chemical weapons incinerator.

“We think it will only be a matter of days until we can finish processing the last of our GB munitions,” said Mike Abrams, a spokesman for the Army’s Anniston Chemical Agent Disposal Facility.

Once the last of the sarin-filled weapons are drained and destroyed and the agent incinerated, workers will begin preparing the Anniston facility to destroy weapons containing the nerve agent VX. After VX, workers will destroy weapons containing mustard blister agent.

The Anniston facility has worked since August 2003 to destroy the sarin-filled weapons, which make up about 20 percent of the chemical weapons stockpile here. As of Thursday, workers had destroyed 137,856 sarin-filled weapons and 88,560 gallons of the nerve agent.

Between Feb. 11 and Thursday, workers destroyed 2,185 of the 105 mm shells and 228 gallons of sarin.

On Monday, workers at the Deseret Chemical Depot near Tooele, Utah, found a 155 mm shell leaking mustard agent inside a storage igloo. The agent was found crystallized on the outside of the shell, rather than pooled inside the igloo.

The leaking shell was cleaned and placed inside an airtight container, according to Alaine Southworth, a spokeswoman for the facility. The round will be destroyed along with other mustard-filled munitions. Workers at the Tooele Chemical Agent Disposal Facility currently are preparing the plant to destroy mustard.

Abrams said Anniston’s stockpile contains mustard-filled 155 mm shells similar to the one found leaking in Utah, as well as 105 mm shells and 4.2-inch mortar rounds. Workers processing the 105 mm shells and the mortar rounds several years ago found some crystallized mustard similar to that found at Tooele, Abrams said. The workers packed the leakers in airtight containers.

Between Feb. 7 and Tuesday, workers at the Newport Chemical Agent Disposal Facility in Newport, Ind., neutralized 900 gallons of VX nerve agent.

Between Feb. 8 and Wednesday, workers at the Umatilla Chemical Agent Disposal Facility in Umatilla, Ore., drained and destroyed 270 sarin-filled bombs, and destroyed 48,989 pounds of the nerve agent.

Weapons disposal at the Pine Bluff Chemical Agent Disposal Facility in White Hall, Ark., is on hold while workers replace piping in the incinerator's pollution-abatement system.