EPA (Environmental Protection Agency)
The United States Environmental Protection Agency.
http://www.epa.gov/
EPA Region 8 Homepage
http://www.epa.gov/Region8/
Department of Labor (OSHA)
http://www.osha.gov/
Federal Motor Carriers Safety Administration
http://www.fmcsa.dot.gov/
Hazardous Materials Safety Administration
http://phmsa.dot.gov/public
Pipelines and Hazardous Materials Safety Administration
Regulatory agency that develops and enforces rules for the Placarding, Training and En-route security of hazardous materials
http://www.phmsa.dot.gov/hazmat/training/publications