The CGP permit requires sediment basins for areas _____ or more.

The requirement for sediment basins in the Construction General Permit (CGP) is established to manage and control sediment loss from construction sites effectively. The threshold of 10 acres is set to ensure that areas of significant size, which are more prone to erosion and sediment runoff, are equipped with appropriate sediment control measures. This helps to protect water quality by preventing excess sediment from entering water bodies, which can cause environmental harm.

Sediment basins are specifically designed to capture and retain sediment-laden runoff, allowing sediment to settle before the water is discharged off-site. By focusing on sites with 10 acres or more, the regulation targets larger disturbances likely to result in substantial sediment generation. Proper implementation of sediment basins on these sites is crucial for compliance with environmental regulations and for maintaining the integrity of surrounding ecosystems.