What do the stormwater application regulations establish?

The correct choice indicates that stormwater application regulations specifically delineate the types of facilities that are subject to the National Pollutant Discharge Elimination System (NPDES) requirements. Under these regulations, certain facilities that discharge pollutants into navigable waters must obtain a permit and adhere to specific best management practices to mitigate stormwater pollution. The NPDES program is essential for controlling and managing stormwater discharges, ensuring that facilities comply with environmental standards aimed at protecting water quality.

This distinction is crucial because it helps clarify which businesses and operations must implement pollutant control measures and monitoring practices as part of their stormwater management plans. The regulations facilitate the assessment and enforcement of compliance, playing a vital role in overall environmental protection efforts.