We are working in a project inside a national park. The site used to be occuppied by a fuel station that was demolished and abated 12 years ago. There is no record of the station's lay-out or foot print. The site includes a wooded area. We are considering the site to be a Previously Developed Area. However, the Reference Guide mentions that for sites with both green and previously developed areas conditions for each specific area should be met. The site is not more that 3 acres and we have no record of the extension of the fuel station. How do we determine if the site is exclusively a Previously Developed Area or a combination of both?