RICHLAND ADOPTS BEST MANAGEMENT PRACTICE DISCOURAGING THE USE OF COAL TAR SEALANTS
The Richland Board of Supervisors has adopted a resolution discouraging the use of coal-tar sealants within the Township. Coal-Tar is a black, liquid sealant which is used to protect and enhance the appearance of underlying asphalt in many driveways, playgrounds, and parking lots. Coal-tar is a potent source of Polycyclic Aromatic Hydrocarbon (PAH) and is a potential concern for humans and aquatic life. (Resolution No. 4 of 2021)
Coal-tar and coal-tar pitch, both used in sealant products, have an extremely high concentration of PAHs and are classified as known human carcinogens. There are alternatives to this material, such as asphalt-based sealing products which have much lower concentrations of PAHs. Residents are encouraged to find out what is being used on their property before sealing driveways, playgrounds, and parking lots.
The figure below shows how it can be introduced into the environment. For more information of the use and dangers of coal tar please go to https://www.usgs.gov/mission-areas/water-resources/science/coal-tar-based-pavement-sealcoat-pahs-and-environmental-health?qt-science_center_objects=0#qt-science_center_objects
AS SEALANT WEARS OFF, WHERE DOES IT GO?
(Credit: Barbara Mahler, USGS. Public domain.)