A leaking M55 rocket containing the nerve agent Sarin (or GB) was located Monday in a chemical weapons storage igloo after weeks of careful isolation procedures.

The extremely low-level nerve agent vapor leak was detected by members of the Blue Grass Chemical Activity laboratory technicians on March 13.

During the extensive monitoring, the igloo was connected to a double-filter bank that constantly filtered the interior atmosphere to endure that no agent vapor could migrate to the outside of the igloo,

Because this is the same igloo where a vapor leak was detected and could not be found in January, constant monitoring efforts were made, said Blue Grass Chemical Activity Civilian Executive Assistant James Rooney.

"We knew it was a very small leak, but in order to safeguard the community, we persevered," Rooney said. "And the persistence paid off. Most of the credit has to go to the professional men and women who operate the mobile laboratories and the toxic chemical crew that goes into the igloo to locate the leaking rocket," he said.

Monitoring continues after the rocket was located until it was certain that there are no other munitions leaking in the same igloo, said Dick Sloan, public information officer for Blue Grass Chemical Activity.

The leaking rocket has been placed in another leak-proof container and placed in another igloo containing previously identified GB-leaking munitions. That igloo is monitored every working day, Sloan said.

There is no danger to the community and local and state emergency preparedness officials were notified of all monitoring and isolation work.