Industry complained about statements concerning the impact of PAHs on humans and the environment. The EPA was willing to clarify the statement that says many PAH's are of concern.
One of the long-standing positions by industry is that the USGS research is flawed. However US EPA agreed that the "quality, objectivity, and transparency is sufficient for their intended uses. EPA is therefore retaining the references to the studies in its publications."
EPA response also reiterated that it "conducted its own research on this topic, and a study that was a set subject to the Agency's peer and administrative review found that coal tar seal coat releases 100 to 1000 times more PAH's than other types of surfaces."
This debunks the grand conspiracy theory perpetuated by the industry that coal tar sealer pollution is merely a witchhunt by a few government scientists.
Ironically a recent industry meeting with the sole purpose of teaching seal coat applicators how to convince their customers to continue to use coal tar sealers failed to mention that the EPA supports the findings USGS on this topic. How convenient!
You can read the entire letter below.