Monthly Archives: January 2018

EPA Withdraws “Once In, Always In” Policy for the Classification of Major Sources of HAPs

In a memorandum dated January 25, 2018, and authored by newly appointed Assistant Administrator, Bill Wehrum, the United States Environmental Protection Agency (“EPA”) withdrew its “once in, always in” policy for the classification of major sources of hazardous air pollutants (“HAPs”) under section 112 of the Clean Air Act (“CAA”).