Updated flare modelling guidance under the local air quality regulation

ERO number
019-2761
Notice type
Policy
Act
Environmental Protection Act, R.S.O. 1990
Posted by
Ministry of the Environment, Conservation and Parks
Notice stage
Proposal Updated
Proposal posted
Comment period
March 12, 2021 - April 26, 2021 (45 days) Closed
Last updated

Update Announcement

This proposal notice has been updated on February 13, 2024 to advise the public that this file is still under active review. The ministry is reviewing the comments it has received to date. The original proposal date and comment period have not been altered.

This consultation was open from:

March 12, 2021
to April 26, 2021

Proposal summary

This notice is to inform the regulated community and the public that we are proposing to update the Technical Bulletin “Modelling Open Flares under O. Reg. 419/05” under Ontario Regulation 419/05: Air Pollution – Local Air Quality.

Proposal details

This Flare Modelling Technical Bulletin was developed to assist modellers by providing the appropriate approach for modelling open flares using approved air dispersion models (e.g. AERMOD or SCREEN3) under O. Reg. 419/05. It is used in conjunction with other ministry documents such as:

  • “Air Dispersion Modelling Guideline for Ontario” (ADMGO)
  • “Procedure for Preparing an Emission Summary and Dispersion Modelling Report”

The ministry is proposing to update the Flare Modelling Technical Bulletin to include an approach for modelling a phenomenon known as stack tip/flame downwash, which can occur under certain flare operating conditions.

This new approach, known as the momentum flux ratio approach, would allow regulated facilities to better account for the unique properties and behavior of flares based on a thorough review of the latest peer review science on flare behaviour.

Facilities will be able to use this new approach to model the stack tip/flame downwash phenomena once they to obtain ministry approval under section 7(1) of the Local Air Quality regulation (O. Reg. 419/05).

See previous EBR notice: 012-4164 Air Dispersion Modelling Guideline for Ontario (ADMGO).

Supporting materials

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Comment

Commenting is now closed.

The comment period was from March 12, 2021
to April 26, 2021

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