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External Events Analysis PHA Lead By: C'Anna Lundberg,Resource Compliance Dreyer's Grand Ice Cream Date: 7/29/2020 Ammonia Refrigeration System Potential to The Expected Date of Monitoring DetectionType of Create a Completion of any Changes Major Hazards Process Mitigatio,n and External Magnitude or Scope of External Events Which Were Considered Resulting From the Most Controls in Systems in Since the Event Release? Recent Hazard Review or Identified Use Use Systems in Last PHA (Yes/No) PHA Use 2745.6(1)(1) 2745.6(1)(2) 2745.6(1)(3) 2745.6(e)(1) 2745.6(e)(2) 2745.6(e)(3) 2745.6(e)(4) 2745.6(e)(5) 2745.6(e)(6) 2745.7(q)(1) 2745.7 q 2 2745.7 3 2745.7 e 1 2745.7 e 2 2745.7 e 3 2745.7 e 4 2745.7 e 5 2745.7 e 6 Is equipment adequately protected from al inspection reveals that process Automatic Shut- equipment is not located in areas subject to Yes N/A vehicular impacts? Offs,Computer n vehicular traffic and/or is adequately protected. Control E Toxic Release, Machinery Ammonia Yes-ore Grand Ice Cream has safe Systems, m Are procedures/practices in place to manage Equipment Room Detection None vehicular movement e. cranes,trains, practices in place for forklift movement in the Failure Manual Shut- ( g., (enclosure) System dock which contains refrigeration equipment. Offs,Check 0 vehicles)in process areas during all hours of the Pallets are not stacked on top of each other in Yes N/A Valves,Relief > day/night including in normal and inclement weather? the dock which makes it very unlikely that Valves eva orators will be im acted by forklifts. Is equipment adequately protected from extreme Yes-The refrigeration systems were designed Automatic Shut- E by refrigeration contactors to account for high Yes N/A @ ambient high/low temperatures? ambient temperatures. Toxic Release, Offs,Computer IDEquipment Control Machinery Ammonia c Is equipment adequately protected from flooding Flooding is unlikely in this region. No N/A Failure, Systems, Room Detection None from internal as well as externals sources? Overpressuriza Manual Shut- (enclosure) System E Offs,Check Z Are procedures/practices in place for removing tion rainwater from secondary containment areas in a No areas identified requiring rainwater No N/A Valves,Relief timet manner and are the adequate? removal. Valves Are measures in place to minimize impacts to Yes-Most refrigeration equipment is located Automatic Shut- process equipment due to a disgruntled inside the machinery room or directly outside Yes N/A Offs,Computer 0employee? the machinery room. Control mSystems, Machinery Ammonia Toxic Release Room Detection None CD Has a Security Vulnerability Assessment(SVA) No-Security Vulnerability Assessment(SVA) Manual Shut- (enclosure) System been performed to evaluate potential impacts to is not required by DHS for ammonia No N/A Offs,Check process equipment? refrigeration processes. Valves,Relief Valves 5 Doc ID: 6a6ea4fac281501 cd30efa4128b75fd8a1870d1 a