GasSim was developed and marketed by Golder Associates on behalf of the Environment Agency of England and Wales, and now has a user community of around 500 people worldwide.

Currently, the primary application of GasSim has been the landfill gas risk assessment component of landfill permit applications within the context of UK legislation. These Regulations implement the EC Landfill Directive and the EC Integrated Pollution Prevention and Control Directive.

There are other specific uses which use only part of the model, including resource assessment, air quality and odour assessment, greenhouse gas impact assessment and human health risk assessment.

The worldwide user base includes

• UK and European Regulators
• Consultants
• Waste Management Companies
• Renewable Power Companies
• Universities

GasSim2 and GasSimLite
GasSim2 is the most recent version of GasSim available, and previous versions are no longer supported on the helpdesk.

GasSimLite is fully functioning freeware based on GasSim version 1.5 which is designed to help landfill operators submit their Pollution Inventory responses to the Environment Agency

The current version of GasSim is Version 2.0. Contact the Golder Associates
Help Desk for information about software upgrades