BOSTON (AP) — Two new Massachusetts sites have been added to the National Priorities List of Superfund sites.

The former Walton & Lonsbury facility in Attleboro and the former Creese & Cook Tannery in Danvers have been added. Superfund is the federal program that investigates and cleans up the most complex, uncontrolled or abandoned hazardous waste sites in the country.

Curt Spalding, the regional administrator of the Environmental Protection Agency's New England office, said adding the sites to the national Superfund list allows EPA to begin addressing contamination issues on the properties.

The former Walton & Lonsbury site housed a chrome plating facility. The former Creese & Cook Tannery property was used as a leather tanning and finishing operation from 1903 to 1981.