User Guidance for Application of TREECS (trademark) and CTS for Environmental Risk Assessment of Contaminants on Department of Defense (DoD) Ranges

Abstract : The Training Range Environmental Evaluation and Characterization System (TREECS) was developed for the Army to forecast the fate of and risk from munitions constituents (MC), such as high explosives and metals, within and transported from firing/training ranges to surface water and groundwater. TREECS requires chemical-specific properties as part of the inputs. The Chemical Transformation Simulator (CTS) was developed by the U.S. Environmental Protection Agency to provide physicochemical properties of complex organic chemicals. CTS has capabilities for estimating chemical-specific properties in the absence of experimentally obtained properties; thus, CTS can help fill data gaps for properties, particularly for emerging MC that have limited experimental data. This report discusses the input requirements, sources of input data, and lessons learned from applying TREECS and CTS.