MURRAY, Ky. (AP) -- A western Kentucky school board and the federal Environmental Protection Agency have reached a settlement over a mercury spill at a high school in November 2006.

The Calloway County School Board on Thursday approved the settlement, under which the board will pay $30,670 for the EPA's removal work at Calloway County High School.

Calloway County Superintendent Kennith Bargo told The Murray Ledger and Times that the original bill was $190,000, so the settlement is a "win-win."

Officials say a student brought the mercury to school and let others play with it before the spill. The school closed for several days while the cleanup took place.

Exposure to metallic mercury can cause permanent brain damage, according to the U.S. Agency for Toxic Substances and Disease Registry.