Dust particles present in smelter emissions contain lead (Pb). Dust particles in the air that contain Pb is referred to as ‘lead in airborne dust’. This lead in airborne dust, along with stack emissions, may travel from the smelter site and settle in the community as part of the dust and soil. In Trail, dust originating at the smelter site as lead in airborne dust (fugitive dust emissions) may come from stockpiles, open handling of materials, buildings and vehicle traffic. Bare soils and deteriorating older paint can also add to Pb in airborne dust.