; (2) to conduct an inspection or investigation in response to an employee complaint, to issue a citation for violations found during such inspection, and to assess a penalty for violations which are not corrected within a reasonable abatement period and for any willful violations found; (3) to take any action authorized by the Act with respect to imminent dangers; (4) to take any action authorized by the Act with respect to health hazards; (5) to take any action authorized by the Act with respect to a report of an employment accident which is fatal to one or more employees or which results in hospitalization of two or more employees, and to take any action pursuant to such investigation authorized by the Act