November 7, 2014 – The EPA completed its reconsideration of the startup and shutdown provisions applicable to coal- and oil-fired electric utilities under the Mercury and Air Toxics Standards (MATS). This final rule includes updated definitions and work practice standards. EPA is also adjusting certain monitoring and testing requirements related to periods of startup and shutdown.

• Final Rule(19 pp, 326 K, About PDF) - Federal Register - November 19, 2014

• Fact Sheet: Final Reconsideration of the Startup and Shutdown Provisions Under the Mercury and Air Toxics Standards (MATS) Action (PDF)(2 pp, 90 K, November 2014)
• Assessment of startup period at coal-fired electric generating units - Revised (PDF)(22 pp, 803 K, November 2014)