The Environmental Quality Board amended Pa. Code Ch. 123, Standards for Contaminants-Mercury Emissions. The change rescinds the ''state-specific'' requirements to reduce mercury emissions from coal-fired electric generating units with a nameplate rated capacity of more than 25 megawatts that produce electricity for sale. The rule took effect November 13, 2010. http://www.pabulletin.com/secure/data/vol40/40-46/2137.html.