Evaluation of Safety and Environmental Metrics for Potential Application at Chemical Agent Disposal FacilitiesEvaluation of Safety and Environmental Metrics for Potential Application at Chemical Agent Disposal Facilities By the end of 2009, more than 60 percent of the global chemical weapons stockpile declared by signatories to the Chemical Weapons Convention will have been destroyed, and of the 184 signatories, only three countries will possess chemical weapons the United States, Russia, and Libya. In the United States, destruction of the chemical weapons