Apartment Building, Residential Dale City, VA – Sprinkler system contains apartment fire to one unit April 13, 2015 viking210 A sprinkler system kept a fire that broke out in a Dale City apartment Thursday from spreading to other units in the complex, according to the Prince William County Department of Fire and Rescue. At about 2:30 p.m., dispatchers received a call about a fire alarm sounding at the Orchard Mills apartment complex in the 15100 block of Bannon Way in Dale City, the fire department said. Fire and rescue crews responded and discovered the fire in a closet in one of the apartments; it had been contained by the sprinkler system. Firefighters suppressed and extinguished the fire.