Storm Water Pollution Prevention Plan (SWPPP) Practice Test

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What is the primary function of erosion control as a best management practice?

To eliminate all rainwater runoff
To treat soil as a valuable resource and retain it on site
To maximize sediment discharge
To pave over exposed soil areas

The correct answer is: To treat soil as a valuable resource and retain it on site

The primary function of erosion control as a best management practice is to treat soil as a valuable resource and retain it on site. This approach focuses on minimizing soil erosion caused by water, wind, and human activities. Erosion can lead to significant loss of topsoil, which is essential for plant growth and maintaining healthy ecosystems. By implementing erosion control measures, such as planting vegetation, using mulch, and installing silt fences, the goal is to keep the soil in place, preventing it from being washed away during rainfall events. In contrast, eliminating all rainwater runoff is not feasible or practical because runoff can be a natural part of the water cycle. Maximizing sediment discharge relates to worsening sediment loading in water bodies, which undermines water quality and defeats the purpose of erosion control. Finally, paving over exposed soil areas might provide a temporary solution but does not adequately address the need to protect and retain soil, leading to increased impervious surfaces and potential water quality issues. Thus, the correct focus on retaining soil emphasizes sustainable land management practices.