The American Petroleum Institute and the National Petrochemical and Refiners Association asked the Environmental Protection Agency September 26 to postpone until next December its plans to issue several air pollution and climate change regulations for refineries so that the agency could further analyze additional emissions data. The agency is preparing an integrated rule for refineries that would revise both the new source performance standards under Section 111 of the Clean Air Act and national emissions standards for hazardous air pollutants under Section 112, which set maximum achievable control technology requirements. Under the December 2010 settlement, the agency agreed to propose GHG standards for petroleum refineries by December 15 of this year and to finalize them by November 15, 2012, but it has twice missed a deadline to propose similar limits on power plants.