This fact sheet describes a data sharing initiative between the US Environmental Protection Agency (EPA) and the US Department of Energy (DOE) using LandTrek. LandTrek is a web-based system that facilitates federal facility site cleanup, closure and transfer or reuse. The LandTrek system is designed to encourage communication and collaboration from site identification through closure, reuse or land transfer. In Spring 2004, DOE will partner with EPA to share monitoring and land use/institutional controls data through the new CDX (Central Data Exchange). As part of EPA's e-government initiative, CDX will help ensure that both the public and regulators can access the information needed to document environmental performance, understand environmental conditions, and make sound decisions to protect the environment. (Date Approximate)