Impervious soil definition
Impervious soil means soil that has a minimum percolation rate slower than one inch in sixty minutes when the ground water level is at least eighteen inches below the bottom of the percolation test hole;
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Related to Impervious soil
Impervious surface means a surface that has been covered with a layer of material so that it is highly resistant to infiltration by water.
Pervious surface means an area that releases as runoff a small portion of the precipitation that falls on it. Lawns, gardens, parks, forests or other similar vegetated areas are examples of surfaces that typically are pervious.
Impervious area means any surface that does not allow stormwater to infiltrate into the ground.
Regulated impervious surface means any of the following, alone or in combination:
Impervious cover means a surface composed of material that significantly impedes or prevents natural infiltration of water into soil.