Household Exposures to PAH from Coal Tar Driveway and Parking Lot Sealants

Posted on February 23, 2010 by Brent C. Taggart

In a paper published last month in Environmental Science and Technology, the authors measured polycyclic aromatic hydrocarbons (PAH) in settled house dust (SHD) in 23 apartments in Austin, TX. Half of the apartments had parking lots sealed with coal tar based parking lot sealcoat and half of them did not. The authors report 530 times more PAH in SHD in the apartments with parking lots sealed with coal tar based sealants than in the other apartments. These findings suggest that coal tar based sealants may play a significant role in household exposures to PAH, notwithstanding the fact that PAH are ubiquitous in urban environments.

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