A) Endpoints

• Toxics: Use the toxic endpoints given in Appendix A of the Risk Management Program regulation.
• Flammables: Flammables: For the worst case, use an overpressure of 1 psi explosion. For the alternative, use a radiant heat/exposure time of 5kw/m2 for 40 seconds.

B) Wind Speed/Atmospheric Stability

• Worst Case: For the worst case, use a wind speed of 1.5 m/s and F atmospheric stability class (nighttime weather conditions).
• Alternative Case: For the alternative, use the typical meteorological conditions at the source.

C) Ambient Temperature/Humidity

• Worst Case: Either the highest maximum daily temperature in the previous three years and average humidity for the site or 25 C and 50% humidity.
• Alternative Case: Typical temperature and humidity for your site.

D) Release Height

• Worst Case: Assume a release height of 0 ft.
• Alternative Case: Release height will be typical of your process you are modeling.

E) Temperature of Released Substance

• Worst Case: Either the highest maximum daily temperature in the previous three years or the process temperature, whichever is higher.
• Alternative Case: Release is at a process or ambient temperature appropriate for the process.