PSD/NSR Investigations

The MacDonald Illig Environmental Group has successfully represented several clients in responding to investigations being conducted by the USEPA to determine whether a violation of the Prevention of Significant Deterioration ("PSD") or the New Source Review ("NSR") regulations issued under the Clean Air Act have been violated. Many of these investigations are triggered by USEPA's decision to investigate a whole sector of industry, such as the petroleum refining industry; while others are triggered by a particular interest in a specific facility. Regardless of the reason behind the investigation, Companies faced with such an investigation need a certain level of experience and understanding of the nuances of the regulations that we can provide to ensure that USEPA reaches the correct conclusions.