"Multiple Industrial Fires Spark Air Quality Concerns in Rockville, Maryland"

A fire involving large oil tanks at a Maryland asphalt plant sent thick black smoke into the sky, prompting air quality concerns. The fire at the F.O. Day Bituminous Company location in Rockville involved two tanks of liquid asphalt and one tank of used motor oil, as well as a conveyor belt and other equipment. Firefighters cannot use water due to the involvement of petroleum-based asphalt and are using foam to smother the flames. No injuries were reported, and the fire was contained with crews making significant progress in extinguishing it.