Standards of Performance for Fossil-Fuel-Fired, Electric Utility, Industrial-Commercial-Institutional, and Small Industrial-Commercial-Institutional Steam Generating Units

EPA is taking direct final action to amend the new source performance standards for electric utility steam generating units and industrial-commercial-institutional steam generating units. This action amends the testing requirements for owners/operators of steam generating units that elect to install particulate matter continuous emission monitoring systems. It also amends the opacity monitoring requirements for owners/operators of affected facilities subject to an opacity standard that are exempt from the requirement to install a continuous opacity monitoring system. In addition, this action corrects several editorial errors identified from previous rulemakings.