A PRELIMINARY SPATIAL EVALUATION OF LEAD CONCENTRATION BY ROAD DUST PARTICLE FRACTION AND THE PUBLIC HEALTH IMPLICATIONS IN NPU-V, ATLANTA, GEORGIA
The Pb concentrations were plotted geographically using ArcGIS 10.1. Resultant maps showed higher Pb concentrations in a central area composed of primarily residential roads; however, a correlation coefficient revealed no significance in the relationship between road type and Pb concentration. Geospatial analysis also indicated elevated Pb concentrations proximal to an expressway (I-75/85) and a railroad (CSX) for each size fraction, as well as highly variable concentrations along arterial roads. This variability in arterial road dust Pb concentration may have been indicative that the road dust was out of equilibrium, given the heavy rainfall that occurred in NPU-V two days prior to collection; future road dust collection at proximal or identical points could further address this question.
The findings in this preliminary evaluation give us insight into the impact of the built environment and historic land use practices on contemporary health outcomes, as well as provide quantitative geochemical data to further characterize environmental hazards in both urban environments and NPU-V, specifically.