Ontario Regulation 419/05

Ontario Regulation 419/05 – Local Air Quality has introduced radical and sweeping changes in the way that Air Quality is regulated in Ontario. The elements of this Regulation will be implemented over a 15 year period with all emitters covered by 2020.


Ontario Regulation 419/05 – Local Air Quality has introduced radical and sweeping changes in the way that Air Quality is regulated in Ontario. Some of the elements introduced in O. Reg. 419/05 include:

  • The contents and format of the Emission Summary and Dispersion Modeling (ESDM) report are now specified by O. Reg. 419/05 with significant changes and additions from the 1998 Guidance Document.
  • Mandated conservatism in preparing emission estimates. Applications for Environmental Compliance Approval must include an ESDM report for all sources of the contaminant(s) associated with the specific application.
  • The use of U.S. EPA air dispersion models (AERMOD, ISCPrime, SCREEN3) is phased in over a period of 15 years.
  • Three schedules of air standards with variable averaging periods to be used in conjunction with the staged implementation of the new list of approved models.
  • Targeted sectors (based on NAICS codes) are identified for phased-in application of the new models and associated effects based standards in 2010 and 2013. All other facilities must demonstrate compliance with new Point of Impingement (POI) Standards by 2010 and the new models and associated effects-based standards by 2020.
  • Specified time frames for facilities unable to meet the scheduled air standards to apply for Alteration of the applicable air standard(s). The proponent must provide a detailed report summarizing the potential impacts, review of available control technologies and an economic analysis. Public consultation is a required element of the Regulation.

Questions?

For more detailed information on Ontario Regulation 419/05, please contact:

Marnie Freer

Penny McInnis