Occupational Safety & Health Administration (OHSA) – osha.gov

Army Corps of Engineers EM 385-1-1 – http://www.usace.army.mil/SafetyandOccupationalHealth/SafetyandHealthRequirementsManual.aspx

National Institute for Occupational Safety and Health (NIOSH) – http://www.cdc.gov/niosh/

American Conference of Governmental Industrial Hygienists (ACGIH) – http://www.acgih.org/

American Society of Safety Professionals (ASSP) – http://www.assp.org/

Board of Certified Safety Professionals (BCSP) – http://www.bcsp.org/