The Oregon Department of Environmental Quality said Thursday that Portland glass manufacturers Bullseye Glass and Uroboros must follow federal air quality rules to control hazardous air pollutants, including metals, and would be required to install pollution control equipment. The federal Environmental Protection Agency told Oregon's Department of Environmental Quality on April 12 that the types of furnaces used by both companies should be considered to be continuously operating even though they go into an 'idling' mode when not producing glass.