What is the function of inlet protection devices, and when should they be used?

What is the function of inlet protection devices, and when should they be used?

• A. They prevent sediment from entering storm drains; used at drainage inlets during active disturbance and for as long as BMPs are in place.
• B. They remove all pollutants from runoff before it enters the storm drains.
• C. They divert water away from drainage inlets without filtering.
• D. They store runoff temporarily to reduce peak flow.

Answer: (C)

Inlet protection devices are placed at drainage inlets to trap sediment as runoff enters the storm sewer, serving as a first line of defense to prevent sediment from leaving the site. They are used during active disturbance and for as long as erosion and sediment control BMPs are in place, until the site is stabilized. They are not designed to remove all pollutants, nor to divert water without filtering, nor to store runoff to reduce peak flow. Those functions belong to other BMPs or practices.

Inlet protection devices are placed at drainage inlets to trap sediment as runoff enters the storm sewer, serving as a first line of defense to prevent sediment from leaving the site. They are used during active disturbance and for as long as erosion and sediment control BMPs are in place, until the site is stabilized. They are not designed to remove all pollutants, nor to divert water without filtering, nor to store runoff to reduce peak flow. Those functions belong to other BMPs or practices.