1. EPA. 1996
2. Environmental Engineering and Operations Working Committee, American Association of Railroads (AAR). 1996
3. Michigan Department of Environmental Quality (MDEQ), Environmental Response Division (ERD). 1995a
4. Michigan Department of Environmental Quality (MDEQ), Environmental Response Division (ERD). 1995 b. Interoffice
5. Texas Natural Resource Conservation Commission (TNRCC). 1994 Risk-Based Corrective Action for Leaking Storage Tank Sites.