Reducing Regulatory Burdens: EPA withdraws “once in always in” policy for major sources under Clean Air Act

Today, the U.S. Environmental Protection Agency (EPA) issued a guidance memorandum withdrawing the “once in always in” policy for the classification of major sources of hazardous air pollutants under section 112 of the Clean Air Act. With the new guidance, sources of hazardous air pollutants previously classified as “major sources” may be reclassified as “area” sources when the facility limits its potential to emit below major source thresholds. “This guidance is based on a plain language reading of the statute that is in line with EPA’s guidance for other provisions of the Clean Air Act,” said Bill Wehrum, assistant administrator of EPA’s Office of Air and Radiation. “It will reduce regulatory burden for industries and the states, while continuing to ensure stringent and effective controls on hazardous air pollutants.” Today’s memo is another step by which EPA is reducing unnecessary regulatory burdens that deterred innovative efforts to improve the environment. The “once in always in” policy has been a longstanding disincentive for sources to implement voluntary pollution abatement and prevention efforts, or to pursue technological innovations that would reduce hazardous air pollution emissions. States, state organizations and industries have frequently requested rescission of this policy, which was one of the most commonly cited requests in response to President Trump’s Executive Order 13777. Today’s EPA action is an important step in furtherance of the president’s regulatory reform agenda while providing a meaningful incentive for investment in HAP reduction activities and technologies...press release