Pouring dust from sealcoated pavement into sample jar

Dust was collected from sealcoated pavements across the U.S. Concentrations of polycyclic aromatic hydrocarbons (PAHs) in dust from sealed pavement in the East, where coal-tar-based products are used, was about 1,000 times higher than in dust from sealed pavement in the  West, where asphalt-based products are used.