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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 damage Yes-Visual inspection reveals that th due to movement of process equipment as a building/equipment located outside is inYes N/A result of high winds? structural condition. Yes-The likelihood of wind-borne debris Is equipment adequately protected from damage impacting the system is low.High winds are Yes N/A Automatic Shut- from impact of wind-borne debris? Offs,Computer a i this i l lik unev n s regon. c Toxic Release, Control Machinery Ammonia Is equipment adequately protected from Yes-Structures appear to be adequate.High Equipment Systems, Room Detection None neighboring structures that might be damaged Yes N/A winds are unlikely in this region. Failure Manual Shut- (enclosure) System from high winds? Yes-Location of equipment does not require Offs,Check outdoor elevated work.The only exception is Valves Are procedures in place to restrict elevated work the roof of the building,but most equipment is No N/A when winds exceed 25 mph? located away from the edge of the roof.High winds are unlikelv in this re ion. y Yes-The likelihood of lightning striking J Is equipment adequately protected from damage ammonia equipment is low.Lightning storms Yes N/A from lightning? are unlikelV in this region. 3 Yes-The likelihood of lightning striking 0Are personnel adequately protected from injury 3 from lightning? personnel is low.Lightning storms are unlikely No N/A Automatic Shut- in this reqion. Offs,Computer Toxic Release, Yes-The likelihood of lightning striking utilities Control Machinery Ammonia Are utilities adequately protected from lightning is low.Lightning storms are unlikely in this Yes N/A Equipment Systems, Room Detection None M or static electricity? Failure, region. Manual Shut- (enclosure) System Explosion,Fire m Are procedures in place for bonding and Offs,Check grounding material transfers to protect against Yes-Lockout/tagout program is in place to Yes NIA Valves °c' static energy accumulation and discharge? control electrical energy. c 1 Are procedures in place to manage a partial or Yes-Loss of power occurs occasionally and complete loss of power and other utilities? facility adapts accordingly.SOP is in place for Yes N/A a start-up following a shut-down. 2 Doc ID: 6a6ea4fac281501 cd30efa4128b75fd8a1870d1 a