At the operations phase that involves disposal of used transportation vehicles and parts, careful selection of disposal sites can help minimize the effect of leaching and consequent groundwater pollution.
At the maintenance phase, leachate generation from petrochemical and herbicide storage facilities could be checked using liners and leachate collection systems.
For right-of-way (ROW) and median maintenance activities that involve the use of herbicides, the timing, rate, and extent of applications can be planned such that the risk and exposure of water resources to adverse impacts will be minimal.
To compensate for possible groundwater deprivation due to a transportation project, construction of a wetland could be made a part of the project