Which agency governs significant change in noise exposure within Part 150 contexts?

• A. FAA
• B. NPS
• C. DOE
• D. EPA

Answer: (A)

Part 150's noise-change decisions are governed by the Federal Aviation Administration. This is the FAA’s framework for airport noise compatibility planning, where airports prepare noise exposure maps and a noise compatibility program when proposed actions could meaningfully alter noise levels for nearby communities. The FAA reviews whether a change in noise exposure is significant and, if so, requires mitigation measures and public involvement as part of the Part 150 process. Other agencies like the National Park Service, the Department of Energy, or the Environmental Protection Agency handle different environmental or land-management roles and do not govern Part 150’s noise-exposure determinations.