Storm Water Pollution Prevention Plan (SWPPP) Practice Test

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When should temporary stabilization be implemented?

On all disturbed areas that will remain inactive for 14 days or more
Only on areas with high rainfall
After construction is fully completed
On any area disturbed for five days or more

The correct answer is: On all disturbed areas that will remain inactive for 14 days or more

Temporary stabilization should be implemented on all disturbed areas that will remain inactive for 14 days or more to prevent erosion and sediment runoff. This practice is essential because disturbances to the soil can lead to increased vulnerability to erosion, especially when there is rainfall. Implementing temporary stabilization measures, such as planting vegetation, using mulch, or applying erosion control mats, helps protect the soil and maintain its integrity during periods of inactivity. This approach aligns with regulatory requirements and best management practices outlined in the SWPPP guidelines. It aims to minimize the potential impact on water quality by managing sediment and other pollutants that can be carried away by stormwater events. Implementing stabilization measures promptly after disturbances, particularly after 14 days of inactivity, is crucial in effective stormwater management.