Under O. Reg. 419/05, any new, updated, or more stringent air standard typically has a phase-in period. Phase-in periods were also introduced with the more advanced air dispersion models. The purpose of the phase-in period is to allow facilities time, if necessary, to achieve compliance with the air standard.
A facility that is not able to implement a standard within the phase-in period may request a site-specific alteration of an air standard. Barriers to implementation may include technical, economic, or time-related issues.
The alteration of standard process was developed to establish interim site-specific standards with the goal of continuous improvement of emissions over time.
This risk-based process for determining an altered air standard is set out in O. Reg. 419/05, along with the Guideline for the Implementation of Air Standards in Ontario. Under this process, a facility must demonstrate that it is doing the best that it can reasonably do to reduce the concentrations of the contaminant that is the subject of the request.
Resources
- Guideline A-12: Guideline for the Implementation of Air Standards in Ontario
- Fact Sheet on Setting Alternative Standards
- Guide to Requesting an Alternative Air Standard
- The Development of a Background Paper and the Application of Cost Effectiveness Indicators for Use in Section 32 Requests Under Ontario Regulation 419: Air Pollution – Local Air Quality
- User Guide: Application of Cost Effectiveness Methodology and Indicators for Use in Section 32 Requests under Ontario Regulation 419: Air Pollution – Local Air Quality
Example forms
Figure 1 – Fabric Filters
Figure 2 – Thermal Oxidizers
Figure 3 – POI Reduction Technique
Blank forms
TRE Calculations for Thermal Oxidizers
TRE Calculations for Venturi Scrubbers
TRE Calculations for Fabric Filters
TRE Calculations General
