Impermeable Material

Impermeable Material means materials that do not allow water to infiltrate into the ground.

Typical examples include building coverage, asphalt, concrete, and other paving materials installed in a manner that prevents infiltration. This does not include materials such as gravel, river rock, wood chips, bark mulch, permeable pavers, permeable concrete, permeable asphalt, soil pavement, and wood decking with spaced boards.