Technical Specs

Emergency Release Dense Gas Model


This product is a Microsoft Windows-based program that can be installed in the following Windows operating systems:

  • 32-bit and 64-bit Operating Systems
  • Windows 10

Minimum requirements:

  • An Intel Pentium 4 processor (or equivalent) or higher
  • At least 2 GB of available hard disk space
  • 1 GB of RAM (2 GB recommended)


SLAB View is an interface for the SLAB model. See below the technical specifications for this model:

Model NameSLAB - An Atmospheric Dispersion Model for Denser-Than-Air Releases
Developed ByDr. Donald L. Ermak, Lawrence Livermore National Laboratory (LLNL)
Model TypeMulti-phase model with Ssteady-state Gaussian Pplume modeland transient puff modes
Time StepSeconds
RangeNear Field
Source TypesEvaporating pool, horizontal jet, vertical jet or stack, instantaneous or short duration evaporating pool
Release TypesDenser than air plumes
MeteorologyUser defined meteorological conditions
Wind FieldHomogeneous
Emissions TypesEmergency release, continuous and transient emissions
Atmospheric ChemistryNot modeled
OutputSLAB produces outputs of chemical concentrations at various positions downwind and at specified heights above the ground
Regulatory StatusUS EPA Alternative Model