Charlotte Observer: After decades of inaction, the federal government in September will release its second major rule affecting coal ash from power plants in less than a year.
Last December, the Environmental Protection Agency released the first federal rules on ash disposal. This month, the agency will set the first federal limits on toxic metals mostly from ash in wastewater discharges from power plants.
The rule is significant, but its reach will be limited. Most utilities, including Duke Energy, are moving...