For a site to be in compliance, the BMPs must be?

For a site to be in compliance regarding stormwater management and erosion control, the best practice measures (BMPs) must be effectively preventing erosion. This is crucial because the primary purpose of BMPs in stormwater management is to minimize soil erosion and sedimentation into water bodies.

When BMPs effectively prevent erosion, they help to maintain the stability of the soil, reduce runoff, and protect water quality. Erosion can lead to significant environmental degradation, including sediment pollution in waterways, habitat destruction, and loss of fertile land. Thus, the effectiveness of BMPs in preventing erosion is essential for meeting regulatory requirements and ensuring sustainable land use practices.

Other considerations such as cost-efficiency can be important, but they do not directly address the fundamental goal of compliance. Similarly, eliminating all vegetation is counterproductive to erosion control, as vegetation plays a vital role in stabilizing soil and enhancing water retention. Maximizing runoff would contradict the intention of BMPs, which aim to reduce runoff and mitigate its impacts.