Dust swept from coal-tar-sealed parking lot pavement
Detailed Description
Dust swept from parking lots sealed with coal-tar-based sealant contains concentrations of polycyclic aromatic hydrocarbons (PAHs) about 1,000 higher than dust from parking lots with other surface types (concrete, unsealed asphalt, asphalt-based sealcoat). Coal-tar-based sealcoat is predominantly used east of the Continental Divide. Read more about coal-tar-based sealcoat and PAHs here.
Sources/Usage
Public Domain.