NSR stands for New Source Review; which condition triggers its requirements?

NSR stands for New Source Review; which condition triggers its requirements?

• A. Major new or modified sources in attainment areas.
• B. Any new source anywhere.
• C. Only demolition projects.
• D. Major new or modified sources in nonattainment areas.

Answer: (D)

New Source Review kicks in when a project involves a major new source or a major modification that would emit pollutants into an area not meeting air-quality standards. In nonattainment areas, this triggers the Nonattainment NSR program, which imposes stricter emission controls and often offsets to help move the area toward compliance. That’s why this choice is the best: it identifies the scenario where NSR requirements are activated. (Note that in attainment areas, a separate track called PSD applies to major sources.)

New Source Review kicks in when a project involves a major new source or a major modification that would emit pollutants into an area not meeting air-quality standards. In nonattainment areas, this triggers the Nonattainment NSR program, which imposes stricter emission controls and often offsets to help move the area toward compliance. That’s why this choice is the best: it identifies the scenario where NSR requirements are activated. (Note that in attainment areas, a separate track called PSD applies to major sources.)