The United States Environmental Protection Agency (U.S. EPA) has identified tens of thousands of polluted sites in the US, in need of an immediate containment/solution.(2) The National Priorities List (NPL) is the list of sites of national priority among the “known releases or threatened releases of hazardous substances, pollutants, or contaminants throughout the United States and its territories”.(3) The U.S. EPA’s National Priorities List for urgent remediation currently li