Certified Storm Water Operator Practice Exam

What should topsoil be at the beginning of grading operations?

1. Replaced

2. Saved

3. Mixed

4. Discarded

The correct answer is: Saved

At the beginning of grading operations, it is important to save the topsoil. This approach is rooted in the understanding of soil health and its critical role in supporting vegetation and preventing erosion. Topsoil is rich in nutrients, organic matter, and microorganisms that contribute to soil fertility and the overall health of the ecosystem. Preserving topsoil allows for its later application to areas that will be re-vegetated or landscaped after construction. This practice helps to minimize soil degradation and promotes successful plant growth by providing a conducive environment for roots. Additionally, when the topsoil is saved and re-used, it can help in managing stormwater by improving infiltration and reducing surface runoff, which is crucial in stormwater management practices. In contrast to saving the topsoil, the other options such as replacing, mixing, or discarding do not align with sustainable land management practices. Replacing topsoil can lead to a loss of nutrient-rich material necessary for vegetation. Mixing might disrupt the soil layers and diminish its quality. Discarding topsoil outright removes valuable resources that are essential for effective stormwater management and environmental restoration.