Emission Risk Assessment of Toxic Gases of Floating Roof Storage Tanks

Document Type : Original Research Paper


1 Department of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran.

2 Department of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran

3 Department of Health, safety and environment, Petroleum University of Technology, Abadan, Iran

4 Azad Uiniversity of TehranDepartment of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran

5 Department of the Environment, North Tehran Branch, Islamic Azad University, Tehran, Iran


Events such as the emission of toxic gases are possible on floating roof storage tanks. Since gasoline is a high-consumption and volatile product stored in adjacent oil depots or large cities, it is necessary to assess their emission risk. Given that the multi-criteria methods allow the identification of and assessment of the indicators well and allow the participation of expert experts, so the FAHP method has been used to identify and assess the risk before the emission of toxic gases. The results showed the importance of 7 factors among 36 factors, 3 of which were related to equipment error. The DOW'S CEI method was used to assess the emission risk if the event occurred. This method provides safe boundaries based on Emergency Response Planning Guidelines (ERPGs), where the results indicate the settlement placement around the oil repository in the range of the predicted concentration at all three levels of ERPG.


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