Published June 08, 2012, 12:00 AM
Editorial - Remember lakes when repairing your driveway
Seal coating makes old asphalt look new and protects its surface, but there are serious environmental concerns with its use. Seal coat comes in two basic varieties: coal tar-based and asphalt-based. The coal tar variety is more resilient, but it contains much higher levels of a class of chemicals called PAHs (polycyclic aromatic hydrocarbons) that harm fish, and with prolonged exposure, pose a risk of cancer in humans.
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