Sealcoating Your Driveway? Be sure you don’t use a product with a coal-tar base. This type of sealcoat has been identified as a major source of PAH (polycyclic aromatic hydrocarbons) contamination. A presentation by members of the Environmental Advisory Council made a presenation to the Solebury Township Board of Supervisors. Click here to find out more. At this time, the Board took no action on this topic.