Which of the following measures is NOT considered a perimeter control?

Perimeter controls are designed to prevent sediment and other pollutants from leaving the construction site and entering adjacent areas, particularly water bodies. They are typically placed at the outer edges of the disturbed area.

A construction entrance serves as a designated entry point for vehicles, reducing mud and sediment tracking off-site. Silt fencing is a common perimeter control method that acts as a barrier to catch sediment-laden water while allowing clean water to flow through. Sediment basins are designed to capture and temporarily store runoff, allowing sediments to settle before the water is discharged off-site.

Soil stockpiling, while it may have some sediment control measures associated with it, does not function as a perimeter control measure. It refers to the storage of excavated soil on the site and does not create a barrier or an active means of controlling the flow of sediment from the site. In this context, it does not fulfill the primary function of perimeter controls, which is to protect the surrounding environment from sediment runoff.