MIDWEST CITY, Okla. (AP) — The U.S. Environmental Protection Agency is proposing to add a property in central Oklahoma to the Superfund program's list of most contaminated sites.

The EPA announced Monday its intent to add Eagle Industries in the Oklahoma City suburb of Midwest City to the National Priorities List, which identifies sites that threaten the public health and environment. The Eagle Industries property was an inspection and repair facility for fire extinguisher systems used on aircrafts.

The EPA says that a 2003 inspection revealed improper disposal of a chemical, which contaminate...