What is a key benefit of performing inspections after rainfall as part of a SWPPP?

Performing inspections after rainfall is essential in a Storm Water Pollution Prevention Plan (SWPPP) because it provides an opportunity to evaluate the effectiveness of stormwater management practices. After a rainfall event, inspectors can assess how well various measures, such as sediment controls, vegetative buffers, or retention basins, are performing in preventing pollution and managing runoff.

This timing allows for a direct observation of water flow, sediment transport, and any potential contaminants being carried away. By examining these factors immediately after they have been tested by actual storm conditions, it becomes easier to identify issues, such as erosion or overwhelmed controls, and take corrective actions if necessary.

This proactive approach can help in optimizing management strategies to reduce the risk of water pollution, ensuring compliance with regulatory requirements, and enhancing the overall effectiveness of the stormwater management system on the site.