Summary of horizontal and vertical setback distances
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 | Requirement | ||
| Karst | 3 | Requirement | ||
| Horizontal | Drinking water well | 100 | Requirement | |
| Building/structure | 10 | Recommended | ||
| Surface water | none unless local requirements exist | If nearby stream is impaired for chloride, see [1] | ||
| Septic system | 35 | Recommended | ||
| Contaminated soil/groundwater | ||||
| Slope | 200 | Recommended | from toe of slope >= 20% | |
| Karst | 1000 up-gradient 100 down-gradient | Requirement | Active karst | |