The Environmental Quality Board amended 25 Pa. Code Chs. 287, 290 and 299, Beneficial Use of Coal Ash. Changes include altered definitions, clarification that coal ash may not be mixed with other types of waste, and clarification of what does not meet beneficial use. Rules took effect December 11, 2010. http://www.pabulletin.com/secure/data/vol40/40-50/2359.html.