Coal Tar Sealants and Urban Sediments, Jan 2011
Author: Kirk O'Reilly Ph.D., J.D., Exponent Inc., Bellevue WA
Scientific Journals (Published & Peer Reviewed)
Polycyclic Aromatic Hydrocarbons (PAHs) in Austin Sediments After a Ban on Pavement Sealers
Authors: Robert P. DeMott; Thomas D. Gauthiera; James M. Wiersemab; Geoffrey Crenson
Polycyclic aromatic hydrocarbon (PAH) concentrations were measured in stream sediments collected before and after a municipal ban on the use of coal-tar-based pavement sealers in Austin, Texas. Samples were collected in October 2005, prior to the ban, and again in April, 2008, approximately 2 years after the ban. Differences in total PAH concentrations between samples collected before and after the ban show no net change in PAH levels in Austin stream sediments. Results of hydrocarbon fingerprinting reveal subtle differences in PAH profiles that appear to reflect the effects of weathering rather than a change in PAH sources.
A look at Austin PAH levels two years after the ban on coal tar based sealers –
No change in PAH levels
Author: Bob DeMott