From the Facility Description portion of the air permit: The City of Virginia Department of Public Utilities is a citizen-owned utility providing steam and electricity to businesses and residents of the local Virginia area. The department has the potential to operate any combination of four boilers using coal and/or natural gas and/or wood as fuel. Boiler 7 can burn both coal, sub-bituminous or bituminous and natural gas; Boiler 9 can burn only coal and Boiler 10 is a natural gas fired boiler. A recent permitted major modification consisted of installing a wood fired boiler to be used for district heating and electric generation. This permit authorized the installation of wood handling and storage equipment. There is an additional boiler, Boiler 8, located at the facility but is physically disconnected from the Utility System. Pollution control equipment consists of wet scrubbers, bag houses, and electrostatic precipitators in combination with good combustion practices.