Ohio Department of Commerce   
Ohio Construction Industry Examining Board 
6606 Tussing Road 
P.O. Box 4009 
Reynoldsburg, OH 43068-9009 

Telephone: (614) 644-3493
http://www.com.state.oh.us/dic/dicocieb.htm

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