For each toxic substance, one alternative scenario must be submitted. For example, if a facility has 5 toxic substances, the Offsite Consequence Analysis must have one worst case analysis and five alternative scenarios.

For each flammable substance, one alternative scenario must be submitted to represent all flammables. For example, if a facility has 6 flammable substances, the Offsite Consequence Analysis must have one worst case analysis and one alternative scenario for the worst case flammable substance.

For the alternative scenario(s), facility must create a scenario which is more applicable to the facility.

Consider a release scenario which is more representative of your facility, such as transfer hose releases, process piping releases, vessel or pump releases due to cracks, spills, and shipping mishaps. Consider 5-year accident history as a basis for the alternative scenario(s).

Active, passive, and administrative controls can be used for the alternative scenario(s).