Certified Storm Water Operator Practice Exam

Applying sediment control practices helps to prevent what?

1. Erosion caused by wind

2. Off-site sedimentation

3. Water pollution directly

4. Plant growth on construction sites

The correct answer is: Off-site sedimentation

Applying sediment control practices primarily helps to prevent off-site sedimentation. This practice is essential because sediment that is displaced during construction activities can wash away with stormwater and be transported to adjacent water bodies, wetlands, or other sensitive areas. When sediment enters these environments, it can cause a range of negative effects, including smothering aquatic habitats, increasing water turbidity, and disrupting the ecosystems. Sediment control measures, such as silt fences, sediment basins, and vegetation buffers, are designed to capture and contain sediment on-site before it can be carried away by rainfall and runoff. By preventing the accumulation of sediment in off-site areas, these practices contribute significantly to protecting water quality and preserving the integrity of terrestrial and aquatic ecosystems. While other factors like wind erosion and water pollution are related considerations, the primary focus of sediment control practices is on mitigating the transport of sediment away from construction sites, which is why this option is the correct choice.