Exxon Mobil Corp will pay $25 million as part of a settlement to clean up a decades-old oil release in New York City, the state’s attorney general said on Wednesday.

The settlement, filed in U.S. district court in Brooklyn, requires Exxon to conduct a comprehensive cleanup of its Greenpoint facility in Brooklyn, which includes oil floating on top of the water table and contaminated groundwater and soil.

“For far too long, residents of Greenpoint have been forced to live with an environmental nightmare lurking just beneath their homes, their businesses and their community,” Attorney General Andrew Cuomo said in a statement.