The General Iron Industries scrap yard still operates in Chicago’s Clybourn Corridor. The industrial site, increasingly an anomaly in the rapidly developing area, is now set to undergo air pollution testing ordered by the U.S. Environmental Protection Agency (EPA), per the Chicago Tribune.

The location of the scrap yard is of particular interest because of its major neighbor: The impending Lincoln Yards development. Lincoln Yards is a frontrunner in Chicago’s pitch to land Amazon’s new headquarters. A 20,000-seat soccer arena has also been proposed in the area.

Lincoln Park residents have previously complained about air pollution coming from the scrap yard. General Iron has been looked at by the EPA several times since the 1990s, according to the report.

In 2016, researchers from the University of Illinois at Chicago collected samples over a period of 10 days and discovered elevated levels of particulate in the air.

The future of the scrap yard is uncertain, but Alderman Brian Hopkins (2nd Ward) hopes that the site will be converted into parkland.