The safety environment inspection system of SK chemicals Ulsan Plant consists of monthly SHE diagnostic evaluations conducted by each department, respectively, theme inspections, weekly situation room inspections, and daily patrols. In addition, SK chemicals achieved accident-free workspaces by focusing on establishing a culture valuing safety and a system for a safe environment, of which efforts further consisted of preventing accidents through discovering and improving risk factors, reducing safety/environment/regulation-related risks through compliance with related laws, and reinforcing education and training. As a result, the company achieved a rank of "S" in the Process Safety Management (PSM) evaluation conducted by the Ministry of Labor and the Occupational Safety and Health Agency in the year 2019.