Settlement Requires New PM Measurements Amid Debate Over Rules

Environmentalists have reached a settlement with a Pennsylvania power plant that requires monitoring and limits for what is known as "condensable" particulate matter (PM), a form of the pollutant that many companies do not track because they contend EPA has not developed a reliable test method. The settlement comes as environmentalists and state officials are pressing EPA to require limits on condensable PM as part of pending rules to implement a new fine particle standard. They argue that older methods...