seepage pit

noun

1. a pit that is lined with a porous, mortarless masonry wall in which effluent from a septic tank is collected for gradual seepage into the ground, sometimes used as a substitute for a drainfield.

Example Sentences

In their site visits, Greenpeace found a series of large evaporation ponds brimming with polluted wastewater, and an unlined seepage pit filled with inky black water.

From Seattle Times

In their site visits, Greenpeace found a series of large evaporation ponds brimming with polluted wastewater, and an unlined seepage pit filled with inky black water.

From Seattle Times