Spatial Analysis and Decision Assistance (SADA; http://www.tiem.utk.edu/~sada/) is evolving freeware that incorporates tools from environmental assessment fields into an effective problem-solving environment. Presenters from EPA and the University of Tennessee will discuss the features in SADA that can be applied to Human and Ecological Risk Assessment problems. This seminar goes beyond the general SADA CLU-IN seminar (archived at: http://www.clu-in.org/conf/tio/sada_081506/) to show the specific capabilities of SADA for making these decisions, including: calculation of site-specific preliminary remediation goals, exposure modeling for human and eco risk, and visualization of potential risks and doses.