These complicated emergencies require technical skills and equipment. Prince William County Department of Fire and Rescue’s Truck and Rescue companies handle these technical and challenging emergencies. Rescue 504 in Gainesville, is staffed 24 hours a day, 365 days a year. Rescue 510, located on Dale Boulevard is staffed Monday through Friday from 6am until 6pm. Three ladder trucks are staffed Monday through Friday from 6 a.m. to 6 p.m. and play a valuable role in assisting the rescue companies with these complicated emergencies.