Tag: BTF

Most Misunderstood Regs: The Mercury ‘Beyond-the-Floor’ Standard

Under the CAA’s maximum achievable control technology (MACT) approach to reducing emissions of air toxics, the MACT floor must be at least as stringent as the average emission limitation achieved by the best performing 12 percent of existing sources in the category (for which EPA has emissions information) or the best performing 5 sources for […]