Patent ID: 8679327
Filing Date: 2014-03-25
Classification: C02F,E03F

Abstract:
1. A bioretention box, for installation in a subgrade soil region, comprising: a vault member; a removable lid for the vault member; a grate positioned in and supported by the lid, wherein the lid, the grate and the vault are capable of supporting vehicular traffic so that the bioretention box is positionable in a parking lot subgrade, the grate being at grade level; a region of treatment material, for storm water coming into the vault through the grate, positioned within the vault; an outlet for treated water which has moved through the treatment region out from the vault to either the subgrade in which the bioretention box is installed or to an exterior storm drain; wherein the vault has a bottom portion with openings therein to which treated storm water from the treatment region can move into the subgrade; a layer of washed rock at the bottom of the vault, extending into the openings in the bottom of the vault between the bottom of the vault and the subgrade; a riser/overflow pipe which extends vertically from a position in the vicinity of an upper surface of the treatment region to approximately the bottom portion of the vault and then connects to a perforated pipe which is positioned in the washed rock at the bottom of the vault, allowing storm water overflow to move into the subgrade; and a horizontal perforated drain pipe positioned below a lower surface of the treatment region, wherein in operation treated storm water moves into the perforated drain pipe and then out through a side wall of the vault to an exterior storm drain.