Is off-site sedimentation excusable if all BMPs have been installed according to an approved plan?

The choice indicating that off-site sedimentation is never excusable, even when all Best Management Practices (BMPs) have been installed according to an approved plan, reflects the stringent environmental standards and regulatory requirements governing stormwater management and sediment control.

The rationale behind this is that BMPs are specifically designed to minimize sedimentation and protect water quality. When BMPs are implemented appropriately, they should adequately control the movement of sediments and prevent them from leaving the site. Therefore, if sediment is still being deposited off-site, it indicates a failure in the effectiveness of those BMPs or in adherence to their proper maintenance and operation.

Furthermore, the fundamental goal of implementing BMPs is to safeguard natural resources, including water bodies, from degradation caused by sedimentation. Acknowledging that off-site sedimentation is permissible under any circumstance could lead to leniency in compliance, ultimately harming the environment. Thus, BMPs must always be effective and upheld in their function to ensure that sediment remains contained within the site boundaries.

This underscores the importance of ongoing monitoring and adaptation of sediment control measures to ensure they are functioning as intended, regardless of the original plans.