Syrian chemical weapons
Syrian victim who suffered an alleged chemical attack at Khan al-Assal village in March receives treatment by doctors at a hospital in Aleppo, Syria. Photo by AP
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The Pentagon is suggesting the world's chemical weapons watchdog uses a U.S.-made mobile destruction unit in Syria to neutralize the country's toxic stockpile, officials told Reuters.

It gave a briefing on the unit on Tuesday to officials at the Hague-based Organization for the Prohibition of Chemical Weapons, who are deciding what technology to use for the ambitious chemical weapons destruction plan, two officials said.

Faced with the threat of a U.S. military intervention, Syrian President Bashar Assad agreed last month to a U.S.-Russian plan to destroy his sizeable chemical weapons program by the middle of 2014.

Initial talks between Washington and Moscow about where to destroy the stockpile included shipping it abroad, but it is illegal for most countries to import chemical weapons, making on-site destruction more likely.

Syria and the OPCW must make a decision on what technology will be used by November 15.

It will largely depend on how Syria's suspected 1,000 tons of sarin, mustard and XV nerve agents are stored. The unit can destroy bulk chemicals, or precursors, but not munitions with a toxic payload. Separating these is more dangerous and time-consuming than incinerating or neutralizing precursor chemicals.

"This is very big business, very political, and several governments are pushing for it," said chemical weapons expert Dieter Rothbacher, who used to train inspectors at the OPCW. "These units will be operating in Syria for a long period of time."

Several countries have already been contacted to provide technicians for trials with the U.S.-made unit, which finished a trial stage in August after half a year of development, said a source who asked not to be named. It is known as the Field Deployable Hydrolysis System (FDHS).

The officials did not provide financial details, but Rothbacher, who helped destroy late Iraqi President Saddam Hussein's stockpile, estimated that the unit would "easily cost hundreds of million of dollars".

A U.S. defense official, also speaking on condition of anonymity, confirmed that a senior U.S. defense official briefed the OPCW about the FDHS, developed at the U.S. Army's Edgewood Chemical Biological Center (ECBC). It could be operational within 10 days of arriving on site, the center says on its website.

"In terms of the situation on the ground in Syria, it is the best viable option," said a person briefed about the FDHS unit, who spoke on condition of anonymity.

OPCW spokesman Michael Luhan had no official comment about the reported briefing, saying the deadline for the detailed plan for the destruction of Syria's chemical weapons was November 15. The Pentagon could not immediately be reached for comment.

More than two dozen inspectors are already on the ground in Syria and have to visit at least 20 production, storage and research sites, some of them in rebel-held territory.

As many as 100 experts will be needed to carry out a labor-intensive verification process, collect and secure declared weapons and witness the entire destruction process.

The OPCW, established to enforce the 1997 Chemical Weapons Convention, is a tiny organization with around 500 staff and an annual budget of under $100 million. It will need significantly more to finish this task.

Many members of the OPCW, including Russia, China, France, Ireland, Britain and the United States, have offered to provide technicians, experts and several million dollars in funding.

Experts say meeting the June 2014 deadline for complete destruction is a difficult goal because the chemicals and weapons are spread over dozens of sites and foreign inspectors have never worked in an ongoing conflict.

Ceasefires will have to be negotiated with opposition forces to allow for safe access to sites in their territory in a conflict that has already claimed 100,000 lives.

The U.S. unit, built by the ECBC and the government's Defense Threat Reduction Agency (DTRA), is operated by a crew of 15. It can destroy up to 25 metric tons of chemical agents per day when run around the clock, according to Edgewood. Several units could be co-located onsite, enabling the sharing of security and other assets, it said.