Coal-tar Sealcoat
Detailed Description
USGS scientist Peter Van Metre examines a parking lot where coal-tar sealcoat has been applied.
Sources/Usage
Public Domain.
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
