SLAB View™

Emergency Release Dense Gas Model

Technical Specifications

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



Model Name

SLAB - An Atmospheric Dispersion Model for Denser-Than-Air Releases

Model Guide

SLAB Model User's Guide

Developed By

Dr. Donald L. Ermak, Lawrence Livermore National Laboratory (LLNL)

Model Type

Steady-state Gaussian Plume model

Time Step



Near Field


Not modeled

Building Downwash

Not modeled

Source Types

Evaporating pool, horizontal jet, vertical jet or stack, instantaneous or short duration evaporating pool 

Input Meteorology

User defined meteorological conditions

Wind Field


Release Types

Denser than air plumes

Emission Types

Emergency release, continuous and transient emissions

Atmospheric Chemistry

Not modeled


SLAB produces outputs of chemical concentrations at
various positions downwind and at specified heights above the ground

Regulatory Status

US EPA Alternative Model

System Requirements

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
  • Windows 8 & 8.1
  • Windows 7 (Home Premium, Professional, and Ultimate Versions)

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)