Jack discovers that his employer is dumping dangerous chemicals into the river rather than disposing of them correctly. when management refuses to listen to his concerns, he contacts the environmental protection agency to report the firm's conduct. this is an example of

This would be a perfect example of whistle-blowing.
Whistle-blowing is an act of exposing the corrupt, illegal or even unethical practices, conducts and activities of the organization, either public or private, by an individual who is an employee of the the said organization. The person doing the act is called a whistleblower. They do this by either presenting the evidence to the higher ups or to the law enforcing agencies. The press is also an option.