821 - Plant facilities fully covered with an operating automatic sprinkler system and other fixed fire protection systems; having a proprietary alarm system meeting Company Standards, as specified in Fire Protection Engineering Bulletin (FPEB) No 32; having completed all fire requirements for the protection of High Hazard materials, where required; and having no insurance carrier recommendations older than three years, qualify and may implement the Single Patrol per Shift Concept (SPSC). Security personnel will make a tour of the high hazard areas (warehouse, flammable liquid storage, waste management, etc.) in the first hour after the last operating shift. Upon completion of this tour, Security personnel will conduct inspections as directed in Fire Protection Bulletin #27 and Security Bulletin #9.