Air emissions from stacks, bag filters and other air emission points can cause health and nuisance problems not only in the locality but sometimes 100's of km away.  Air Dispersion Modelling can predict whether there will be problems with emissions from your site. Environmental Efficiency has a range of Air Dispersion Models at its disposal to ensure a cost effective solution to satisfy your requirements.  Environmental Efficiency can undertake Air Dispersion Modelling for gas and particulate air emissions to prove compliance with legislation and other requirements.

Where existing emissions levels are high, it may be necessary to run Air Dispersion Models to show that the Process Contribution (i.e. the emissions from the site) plus the background concentration (i.e. the ambient concentration) is  below Air Quality Standard for the substance of interest.

Where the results from an Air Dispersion model show high concentrations, then the Air Dispersion Model can examine the effect of increasing stack height, increasing gas velocity or other modifications intended to reduce concentrations.

Environmental Efficiency normally uses AERMOD View which incorporates three US EPA air dispersion models (AERMOD, ISCST3 and ISC-PRIME)into one integrated package.  In special cases such as high stacks near coasts or significant emissions during calm periods then Environmental Efficiency can use other more appropriate models.

To reduce the cost of air dispersion modelling, Environmental Efficiency can undertake screening exercises.  These can be useful in determining whether the air emissions are significant enough to require air dispersion modelling in detail. 

Air Monitoring Overview          Monitoring and Analysis Overview