The Iowa Department of Natural Resources (DNR) has taken a “risk-based” approach to assessment and cleanup of leaking underground storage tanks (LUSTs) for more than 20 years with the intent of protecting human health and the environment from threats caused by petroleum contamination. This approach relies on computer modeling and simulation of the subsurface at LUST sites as a predictor of risk and a measuring stick for understanding when cleanup has been effective. This website is host to the latest version of Iowa Risk-Based Corrective Action (RBCA), which is now in the format of a web-based application.
The documentation contained in this application is public information and the right to view analytical and modeling results for all sites is available to everyone. The right to modify these documents is reserved for Iowa Certified Groundwater Professionals and LUST Project Managers at the Iowa DNR. Please use the information on the Contact page if you have questions or concerns regarding information or accessibility.