Power plants will not have to meet new limits until 2020 for toxic wastewater that comes from using air pollution control systems and transporting bottom furnace ash.  The U.S. EPA announced that it was postponing by two years compliance dates that would be required for more than 1,000 power plants nationwide as it reconsiders how strictly it should limit those sources of wastewater.  The postponement applies to Obama-era limits on wastewater generated by transporting bottom ash from scrubber units to capture sulfur dioxide emissions from the burning of petroleum coke and coal.  Industry representatives have pushed for the extension of… Read more