title: Chemical spill exposure assessment.
abstract: POSSM, the PCB On-Site Spill Model, is a contaminant transport model developed to predict environmental concentrations associated with a chemical spill. The model predicts daily changes in chemical concentrations on a spill site (e.g., in soil and on vegetation) and losses of chemical due to volatilization, surface runoff/soil erosion, and leaching to groundwater. Spill areas consisting of soil/vegetation and/or an impervious surface (e.g., asphalt and concrete) can be analyzed, as can different spill cleanup practices. POSSM is used to analyze exposure levels associated with a hypothetical capacitor spill. While the model was developed for PCB spills, it is generally applicable to a number of organic compounds.
mesh_terms: D000059:Accidents; D004781:Environmental Exposure; D006801:Humans; D008962:Models, Theoretical; D011078:Polychlorinated Biphenyls; D012306:Risk
chemical_list: D011078:Polychlorinated Biphenyls