Which of the following materials is NOT typically used in inlet protection?

Inlet protection is a critical aspect of erosion and sediment control practices, particularly to prevent sediment-laden runoff from entering stormwater inlets during construction activities. The materials used for inlet protection are specifically chosen for their effectiveness in filtering sediment while allowing water to pass through.

Stone is commonly used due to its durability and capacity to create a structural barrier that can accommodate the flow of water while trapping sediment. Woven slit film geotextiles are also frequently utilized because they offer a good balance between filtration and hydraulic conductivity, enabling them to filter sediment effectively.

Nonwoven geotextiles are often employed as well, as they provide a high level of sediment retention and are known for their effectiveness in sediment control applications.

On the other hand, sand is not typically used for inlet protection. While sand can serve as a filtering material, it does not provide the same level of structural integrity or sediment retention as the other options. Sand may easily wash away or become displaced during storm events, reducing its efficiency in controlling sediment at inlets. Therefore, the inclusion of sand as a material for inlet protection is not standard practice, making it the correct choice for this question.