The Superfund Program is charged with protecting human health and the environment from the release of hazardous substances, petroleum pollutants or contaminants into the environment. The program seeks to ensure that contaminated sites are evaluated and cleaned up in a timely manner. In most cases, this means overseeing companies or individuals who have taken responsibility for cleaning up contamination found on their property. In cases where a responsible party cannot be found or is unable to act, the Superfund Program may take a direct role in cleaning up a site. Furthermore, the Superfund program is committed to the safe and productive redevelopment and reuse of sites and properties on which releases have occurred, residual contamination remains, or there is the perceived presence of releases. The program promotes and assures this by evaluating and approving voluntary remedial actions and property management plans.