Arizona Registrar of Contractors
800 W. Washington, 6th Floor
Phoenix, AZ 85007
(602) 542-1525
http://www.rc.state.az.us

 
Bureau of Alcohol, Tobacco, Firearms, and Explosives

http://www.atf.gov

Department of the Interior

http://www.doi.gov

Department of Transportation

http://www.dot.gov

Explosives Academy 

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Occupational Safety and Health Administration