Email Outage: Sept. 6 - 9

The South Carolina Department of Environmental Services will be migrating email services and staff will be unable to send or receive messages from 5 p.m. on Friday, Sept. 6 until 7 a.m. Monday, Sept. 9. Phone calls and text messages will not be interrupted during the email outage. We apologize for any inconvenience this may cause and appreciate your understanding and support as we make this transition to better serve you in the future.

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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.
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Environment