7.5 References
Douglas Rupik, M.Ed., JIW
Occupational Safety and Health Administration. (n.d.). Shipyard employment eTool: General requirements–General working conditions. U.S. Department of Labor. https://www.osha.gov/etools/shipyard/general-requirements/working-conditions
Occupational Safety and Health Administration. (n.d.). Shipyard employment eTool: Ship repair–Confined or enclosed spaces and other dangerous atmospheres. U.S. Department of Labor. https://www.osha.gov/etools/shipyard/ship-repair/confined-spaces
Occupational Safety and Health Administration. (2015). Trenching and excavation safety. OSHA.gov. https://www.osha.gov/sites/default/files/publications/osha2226.pdf
Zippia. (2021, January 29). Welder demographics and statistics in the US. Zippia.com. https://www.zippia.com/welder-jobs/demographics/