"It may cost up to $2 billion to clean up toxic firefighting chemicals that have leaked from more than 400 U.S. military installations, including Fairchild Air Force Base, a group of Democratic senators said Tuesday in a letter to the Senate Appropriations Committee.

The senators, including Patty Murray and Maria Cantwell of Washington, attributed that cost estimate to U.S. Department of Defense officials.

The senators requested a study of the chemicals known as PFOS and PFOA, which were key ingredients in a foam that was used for decades to douse aircraft fires at military bases and civilian airports."

Chad Sokol reports for the Spokane Spokesman-Review September 6, 2017. [2]