Terra Mentis staff provided risk assessment and toxicology support and guidance to consulting engineers on a state-led active railroad site that contained hazardous wastes, such as chlorinated solvents and diesel, in soil and groundwater. High levels of TCE and PCE in groundwater were migrating into indoor air on- and off-site and worked with the PRP to determine the potential risk and liability associated with human exposures. Attended numerous public and agency meetings and was involved in agency negotiations.