Required and recommended minimum vertical and horizontal setback distances. This represents the minimum distance from the infiltration practice to the structure of concern. If the structure is aboveground, the distance is measured from the edge of the permeable pavement to the structure. If the structure is underground, the vertical setback distance represents the distance from the point of infiltration through the bottom of the system to the structure, while the horizontal setback distance is the shortest distance from the edge of the system to the structure.
Link to this table

Structure Distance (feet) Requirement or recommendation Note(s)
Vertical Saturated soil 3 Requirement
Bedrock 3 Required
Karst 3 Required