Assessing and managing hazardous ground gases

As a leading protector of human health and the environment, the EPA has prepared technical guidance on managing the risks from hazardous ground gases on contaminated land.

Toxic, flammable or explosive gases may be in the ground at contaminated sites such as landfills or industrial facilities after a chemical release, or may be naturally present in the environment. The presence of hazardous ground gas can

  • result in illness, injury or death
  • damage buildings, infrastructure and the environment

The risks from hazardous ground gas should be assessed, particularly during redevelopment on or adjacent to contaminated land.

Topics include

  • information on the origin and behaviour of hazardous ground gases
  • recommended site assessment techniques
  • risk assessment, management and mitigation options
  • planning and regulatory processes

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