The sale is in line with the original agreement signed on 28 April 2011.
The facility is used for disposal of large volumes of salt water generated from fracture stimulation operations on Barnett Shale gas wells.
Consisting of a surface plant and an existing shallow well bore, the facility has an existing permit for the disposal of 15,000 barrels of salt water per day, conditional only upon deepening the well bore into the Ellenberger formation.
Imperial will invest $1.2m to bring the facility on stream in a bid to take advantage of the buoyant disposal demand in the Barnett Shale area.
