DERIDDER, La. — The U.S. Environmental Protection Agency says a Louisiana site contaminated with creosote should be added to the Superfund list of the nation’s most contaminated sites.

The American Creosote site is south of DeRidder in Beauregard Parish. The Louisiana Department of Environmental Quality says it was a timber treatment operation for the first half of the 20th century.

A news release Monday says EPA has proposed adding it to the list.

The Superfund program cleans sites highly contaminated with hazardous waste. More than 1,300 sites are prioritized nationally for cleanup.

State environmental quality secretary Chuck Carr Brown says his agency is happy to join EPA in adding the site to the list. He says it is just one of many that need immediate attention.