SWT completed a series of biological studies assessing the effect sealants have on streams, including a recent publication in Environmental Pollution, a field study in the Journal of the North American Benthological Society(2007) and a (2006) USGS fact sheet.

The group also evaluated the rate at which coal tar sealant wears off parking lots in Austin using photographic analysis and published that article in Environmental Science and Technology in 2009 (read report). They also worked extensively with the New York Academy of Sciences on their comprehensive 2007 report on PAHs in New York Harbor, which found that coal tar sealants were one of the primary sources of PAHs to the Harbor (read report). SWT continues to monitor background PAH levels in Austin's streams receiving water bodies and will report on effects of the citywide ban in 2011.

• USGS Fact Sheet on Coal Tar Sealant
• PAHs Underfoot:Contaminated Dust from Coal-Tar Sealcoated Pavement is Widespread in the United States
• D.C. Ban on Toxic Pavement Sealants Helps Clean-Up Waterways
• Effects of PAHs on benthic communities below coal tar sealed parking lots (JNABS)
• New York Academy of Science - Harbor Report on PAHs
• Wear rate of coal tar sealant in Austin