On its website, the U.S. Department of Labor, Occupational Safety and Health Administration, provides this advice regarding “Workers’ Right to Refuse Dangerous Work”: 

“If you believe working conditions are unsafe or unhealthful, we recommend that you bring the conditions to your employer’s attention, if possible. You may file a complaint with OSHA concerning a hazardous working condition at any time. However, you should not leave the worksite merely because you have filed a complaint. If the condition clearly presents a risk of death or serious physical harm, there is not sufficient time for OSHA to inspect, and, where possible, you have brought the condition to the attention of your employer, you may have a legal right to refuse to work in a situation in which you would be exposed to the hazard.”