The following pretreatements are recommended where sheet flow is being directed to a BMP (typically a [[Bioretention cells| bioretention cell]]) from the edge of an impermeable surface such as an asphalt parking lot or a paved plaza:
The following pretreatements are recommended where sheet flow is being directed to a BMP (e.g. a [[Bioretention cells|bioretention cell]]) receiving flow from the edge of an impermeable surface such as an asphalt parking lot or a paved plaza: