Parking lot sealcoat: a major source of PAHs in urban and suburban environments.(EH Update)(Brief Article)

From: Journal of Environmental Health | Date: October 1, 2005 | Copyright information

Coal tar-based sealcoat--the black, shiny emulsion painted or sprayed on asphalt pavement--has extremely elevated concentrations of polycyclic aromatic hydrocarbons (PAHs) and can affect the quality of downstream water resources, according to a recent joint study in Texas by the USGS National Water-Quality Assessment (NAWQA) Program and the city of Austin. PAHs are an environmental concern because they are toxic to aquatic life and because several are suspected human carcinogens. Small particles of sealcoat flake off as they are abraded by vehicle tires and can wash into urban ...

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