; (II) for employers to respond to reports of workplace violence; (III) for employers to perform a post-incident investigation and debriefing of all reports of workplace violence with the participation of employees and their representatives; and (IV) to provide medical care or first aid to affected employees. (v) Procedures for emergency response, including procedures for threats of mass casualties and procedures for incidents involving a firearm or a dangerous weapon. (vi) Procedures for communicating with and training of covered employees on workplace violence hazards, threats, and work practice controls, the employer’s plan, and procedures for confronting, responding to, and reporting workplace violence threats, incidents, and concerns, and employee rights. (vii) Procedures for coordination of risk assessment efforts, Plan development, and implementation of the Plan with other employers who have employees who work at the covered facility or who are performing the covered service. (viii) Procedures for conducting the annual evaluation under paragraph (6). (C) Availability of Plan Each Plan shall be made available at all times to the covered employees who are covered under such Plan. (2) Violent incident investigation (A) In general As soon as practicable after a workplace violence incident, risk, or hazard of which a covered employer has knowledge, the employer shall conduct an investigation of such incident, risk, or hazard under which the employer shall— (i) review the circumstances of the incident, risk, or hazard, and whether any controls or measures implemented pursuant to the Plan of the employer were effective