Unofficial USGS Video Series Now Online!
The United States Geological Survey (USGS) has produced the majority of the scientific work into the problem of coal tar sealant pollution. They generously have worked to educate the public about their research either by webcasts or personal presentations. While this series, which is taken from an August 2010 presentation in Springfield, Missouri, is available […]
Great New Resource for Coal Tar Info
Every now again a community comes along to assemble the disparate sources of information about coal tar sealants in one place. It serves the purpose to assist their respective communities in decision making and is a communication tool if any legislative action is taken. The City of Austin, TX did this early on in their […]
Just How Toxic Are Coal Tar Sealants?
We continue to hear some say that coal tar sealants have the toxic ingredients refined out (generally polycyclic aromatic hydrocarbons, PAH). This in spite of the laboratory levels of showing extremely high concentrations. A few years ago, I came across this research that got little attention when presented back in 1997. It pre-dates any of […]
Field Test for Coal Tar Sealant Determination
Funny that this simple test has been the source of a lot of consternation, much of which will have to wait for a more thorough re-telling. Suffice it to say, that my colleague, who will want to remain anonymous, and I knew the importance of finding a repeatable field test. We found out about the […]