Air Dispersion Modeling

Air Dispersion Modeling is often a requirement for attaining Environmental Compliance Approval and Air Permits. LEHDER offers extensive modeling expertise across a wide variety of sectors. Pro-active self-assessment is an area where LEHDER excels, allowing clients to identify potential problems and employ effective solution development.


Air Dispersion Modeling is used by many regulatory agencies as a means of assessing the impact of a facility on the air quality of the surrounding area.


In many instances, the results of an Air Dispersion Modeling study will be compared to legislated ambient or ground level air pollution criteria to determine the compliance status of a facility.

What is Air Dispersion Modeling?

Air Dispersion Modeling predicts how pollutants are dispersed in the atmosphere from different pollution sources taking into account building influences, topography, meteorology, downwind distances, and other factors.

Dispersion Modeling is often a requirement for attaining Environment Compliance Approvals (previously Certificates of Approval) and Air Permits. LEHDER offers extensive modeling expertise across a wide variety of sectors including petroleum and petrochemical, steel manufacturing, glass manufacturing and chemical industries.

   

Dispersion Modeling Services Offered

In addition to dispersion modeling for approval applications, pro-active self-assessment is an area where LEHDER excels, allowing clients to identify potential problems before they arise and to employ effective solution development.  This often includes assisting industrial facilities in planning for shutdown and start up situations using a variety of modeling techniques.  When unexpected events do occur, LEHDER provides post-event modeling including development of local meteorological data.

LEHDER employs the use of AERMOD to conduct detailed odour modeling studies and solution development.  These modeling projects involve extensive modeling and data processing to evaluate the frequency of odour impact at sensitive receptors. Assisting facilities in addressing local odour concerns can be very rewarding by improving industry relationships with local residents.    

LEHDER conducts modeling using the following models:

  •         Reg. 346 Model (Run 308)
  •         AERMOD
  •         SCREEN3

Computer dispersion models are a relatively inexpensive and expedient means of providing air quality information. For example, models can be used to predict the future concentration of a particular pollutant after the implementation of a new pollution control program.

The results of the modeling are then used to estimate the effectiveness of the control program and whether it is worth the cost of implementation. Because of their ability to evaluate a variety of options for managing air quality, dispersion models are an important planning tool.

The air dispersion modeling team at LEHDER is continually involved in professional development training and keeping abreast of the newest changes and developments in the field of air dispersion modeling.  

Questions?

For more detailed information on Air Dispersion Modeling, please contact:

Marnie Freer

Penny McInnis