YAKIMA, Wash. -- The new chairman of a key Senate committee has asked for a federal investigation into leaking underground waste tanks at the nation's most contaminated nuclear site.
Oregon Sen. Ron Wyden is the new chairman of the Senate Energy and Natural Resources Committee.
The Democrat's home state also neighbors Washington state, where news broke last week that six tanks are leaking at the Hanford nuclear reservation.
Wyden asked the Government Accountability Office in a letter Tuesday to investigate when the Energy Department and its cleanup contractors knew about the leaks and whether they reported them appropriately.
Wyden also wants an examination of the maintenance and monitoring programs for the tanks that hold highly radioactive waste left from nuclear weapons production.