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Coal Tar
 Websites presented in alphabetical order Parking-Lot Sealcoat: A Major Source of PAHs in Urban and Suburban Environments 
 This site reports on 2005 findings that "coal-tar based sealcoat -- the black, shiny emulsion painted or sprayed on asphalt pavement such as parking lots -- has extremely elevated concentrations of polycyclic aromatic hydrocarbons (PAHs) and can affect the quality of downstream water resources." Includes a FAQ covering PAHs, coal tar, and sealcoat, and links to related information. From the U.S. Geological Survey (USGS). http://water.usgs.gov/nawqa/asphalt_sealers.html Topics: Pollutants & Toxic Substances, Pollution, Water Last updated Jul 5, 2005 |
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