Jackson Hole Airport has undertaken a parking lot/rental car facility upgrade planning project. This includes relocating and expanding the parking lots and replacing the rental car Quick Turn Around facility. Airport Manager Ray Bishop says the project may require updating the existing wastewater treatment system. A White Paper has been issued to evaluate potential wastewater treatment and disposal methods for airport and recommend a preferred alternative. Bishop says the costs of the five alternatives for treating and disposing of the airport’s wastewater range from approximately $370-thousand to $3.2-million. At the same time, the surface footprints for each alternative range in size from no footprint to over 198-thousand feet. Emphasis is being placed on a small surface footprint as well as cost in selecting the best alternative. Consequently, the preferred alternative with smallest impact to the airport development is a tertiary level packaged wastewater treatment plant followed by injection wells. While some members of the public have voiced concerns the plan might pollute the groundwater, engineers say the proposed plant would actually reduce nitrogen levels in the aquifer.