Evaluation of the Potential Water Quality Impacts of Dust Suppressants,” Report prepared for Expert Panel on the Potential Environmental Impacts of Dust Suppressants, organized by the

environmental impacts of chemicals/materials used as dust suppressants on roads, developing properties and other areas. The senior author, G. Fred Lee, was an invited participant on the Expert Panel. The authors ’ expertise and experience are primarily focused on evaluating surface water and groundwater quality impacts of chemicals that are disposed of or used in a manner that could lead to environmental pollution. Evaluating the potential environmental impacts of chemicals used as dust suppressants is within the expertise of the authors. Presented below is a summary of the overall approach that should be used to determine whether dust suppressants represent a potentially significant environmental threat through their impacts on surface water and/or groundwater quality The focus of this discussion is on adverse impacts to aquatic life in the receiving waters for runoff from areas that have received application of dust suppressants, as well as groundwaters in which dust suppressants have migrated from the point of application to the water table and, therefore, are a potential threat to those who use the groundwater for domestic or agricultural purposes