What this service delivers
Clear answers on compliance, impacts, and risk
Ambient air quality assessments evaluate how project emissions may affect off-site concentrations and how results compare to applicable criteria. We translate complex inputs—emissions, meteorology, terrain, and receptors—into a clear, decision-ready narrative.
Regulatory-ready documentation
Methods, assumptions, and results presented in a format suitable for permitting and technical review.
Actionable mitigation options
Practical controls and operational strategies to reduce impacts and improve confidence in outcomes.
Scope & deliverables
What’s included in an ambient air quality assessment
Each project is tailored to the site, sector, and regulatory pathway. Typical components include:
Emissions characterization
Identify emission sources, operating scenarios, and input parameters (rates, temperatures, exit velocities, stack geometry, and controls).
Assessment methodology
Define applicable standards and averaging periods, receptor selection, background concentrations (as appropriate), and modelling approach consistent with guidance.
Results & interpretation
Summarize predicted concentrations, compare to criteria, and highlight key drivers and sensitivities.
Mitigation & next steps
Recommend feasible controls, design refinements, monitoring considerations, and a clear path to close any remaining gaps.
Why it matters
Reduce uncertainty and keep projects moving
Ambient air quality assessment FAQs
Common questions we help clients answer during planning, permitting, and operational changes.
When do I need an ambient air quality assessment?
Typically when a new project, expansion, or process change could affect off-site air concentrations or triggers permitting requirements. We can help confirm the appropriate pathway early.
How is this different from air dispersion modelling?
Dispersion modelling is usually a core technical component. The assessment adds context—criteria selection, scenario definition, interpretation, mitigation, and documentation for review.
What inputs do you need from us?
Process details, operating schedules, stack/source parameters, control equipment information, site layout, and any existing emissions or monitoring data. We’ll provide a clear request list.
Can you work with limited emissions data?
Yes. We can develop screening-level estimates, refine with engineering calculations, and recommend targeted measurements where needed to improve confidence.
Do you support Ontario (MECP) requirements?
Yes. SRJ Consulting supports projects across Canada with a focus on Ontario, aligning work with applicable guidance and regulatory expectations.
What does the final deliverable look like?
A concise technical report with methods, assumptions, results tables/figures, compliance comparison, and recommended mitigation or next steps.