MRI's fugitive dust group is currently expanding the database of particle size distributions of airborne fugitive dust. MRI's considerable and well-respected expertise is the basis for characterizing PM emission sources and evaluating whether additional emission tests would be beneficial to specific industry groups. Modeling MRI develops and applies dispersion models for exposure and risk assessments in both outdoor and indoor environments. These models are used to study cyclic emissions from open dust sources, continuous releases from traditional industrial processes, and sudden releases from sources such as explosives detonation at U.S. Air Force facilities. MRI-developed models are widely used for rapid assessment of exposure from newly discovered land contamination sites and for Superfund applications.
Unpaved roads are a major source of airborne particulate matter.
Vehicle traffic generates dust from resuspension of the roadway surface dust, by pavement and tire wear, by wake disturbance of road shoulders, and by resuspension of dust on vehicle undercarriages. Construction Activities Construction activities often constitute a major source of PM emissions in urban areas that are not attaining the PM-10 standard. The three most common activities are debris removal, site preparation, and constrution. The temporary nature of construction site activities rules out some control measures. There are no sessions scheduled at this time.