What regulatory rules cover stormwater runoff for a 3 acre construction site?

The correct choice is as follows: Stormwater Phase 2 rules govern stormwater runoff for construction sites that disturb between one and five acres of land. These regulations are part of the National Pollutant Discharge Elimination System (NPDES), which aims to manage the quality of stormwater runoff and reduce pollutants that can harm water bodies. The Phase 2 rules specifically target smaller construction activities, which is crucial because even projects that seem relatively small in size can have significant environmental impacts due to erosion, sedimentation, and the introduction of various contaminants into local waterways.

In contrast, the Phase 1 rules mainly address larger construction sites disturbing five acres or more and do not apply to the specified three-acre site. The Clean Water rules and Environmental Protection rules refer to broader frameworks for water quality and environmental protection but do not specifically target stormwater runoff regulations applicable to construction sites. Hence, the specificity of the Phase 2 rules makes them the appropriate regulatory framework for a three-acre construction site in relation to stormwater management.