Patent ID: 8544219

Claim:
A drainage and ground vapor mitigation system adapted for ground vapor isolation of and liquid drainage from a subterranean chamber or basement having a floor and an internal environment, the system comprising: a drainage channel, at least in part inside the subterranean chamber or basement, comprising a drainage conduit extending longitudinally along the floor; the drainage conduit having a drainage portion and a venting portion disposed therein so that a conduit wall is common to both the drainage portion and the venting portion and extending longitudinally along the floor in the drainage conduit, the venting portion and drainage portion interfacing each other and being configured so that the interface therebetween is capable of maintaining a pressure difference across the interface between the internal environment and an external environment; a valve located between the drainage portion and the venting portion; and a discharge drain connected to the drainage channel so that liquid drains out of the drainage channel; wherein drainage liquid from the basement flows into the drainage portion and from the drainage portion through the valve into the venting portion to the discharge drain.