You are here:
Spatial Gradients and Source Apportionment of Volatile Organic Compounds Near Roadways
Citation:
OLSON, D. A., D. HAMMOND, R. L. SEILA, J. M. BURKE, AND G. A. NORRIS. Spatial Gradients and Source Apportionment of Volatile Organic Compounds Near Roadways. ATMOSPHERIC ENVIRONMENT. Elsevier Science Ltd, New York, NY, 43(35):5647-5653, (2009).
Impact/Purpose:
The National Exposure Research Laboratory′s (NERL) Human Exposure and Atmospheric Sciences Division (HEASD) conducts research in support of EPA′s mission to protect human health and the environment. HEASD′s research program supports Goal 1 (Clean Air) and Goal 4 (Healthy People) of EPA′s strategic plan. More specifically, our division conducts research to characterize the movement of pollutants from the source to contact with humans. Our multidisciplinary research program produces Methods, Measurements, and Models to identify relationships between and characterize processes that link source emissions, environmental concentrations, human exposures, and target-tissue dose. The impact of these tools is improved regulatory programs and policies for EPA.
Description:
Concentrations of 55 volatile organic compounds (VOCs) are reported near a highway in Raleigh, NC (traffic volume of approximately 125,000 vehicles/day). Levels of VOCs generally decreased exponentially with perpendicular distance from the roadway 10-100m). The EPA Chemical Mass Balance (CMB8.2) was used to apportion VOCs into four sources (motor vehicles, natural gas, propane gas, evaporative gasoline).
URLs/Downloads:
Spatial Gradients and Source Apportionment of Volatile Organic Compounds Near Roadways (PDF, NA pp, 5118 KB, about PDF)Atmospheric Environment
