The New Two-Siren Emergency Warning System At A Plant In Greene County Has Been Successfully Tested, And The Sirens Are Now Fully Operational. U.S Nitrogen On Pottertown Road In Midway Recently Installed The Sirens To Alert Residents And Others Within A 2-Mile Radius In The Event Of An Emergency At The Facility. U.S. Nitrogen Is A Global Leader In The Manufacturing Of Industrial Explosives Used In Mining Operations.