Air Emissions Inventory and Dispersion Modelling
A quantified emissions inventory and AERMOD and CALPUFF dispersion analysis for your facility
Air Emissions Inventory
and Dispersion Modelling
Our team develops a comprehensive air emissions inventory for your facility covering the criteria pollutants, the hazardous air pollutants, the greenhouse gases and odour. We then run atmospheric dispersion modelling with AERMOD and CALPUFF to predict the ground level concentrations, compare them against the ambient air quality standards and support your permit applications. The result tells you which sources actually drive your impact and gives you the modelling evidence a regulator expects.
Our implementation model
A practical, phased delivery approach that runs from gap assessment through operational embedding and is built around your regulatory context.
Compile point source inventory (stacks, vents, fugitives) and area source inventory (storage, fugitives, road dust), apply emission factors per EPA AP 42 / EEA EMEP EEA / IPCC, align with EU IED / US Clean Air Act.
Build mass balance per source, fuel consumption, raw material throughput, product yield, waste generation, apply emission calculation methods (mass balance > emission factor > engineering estimate per EPA hierarchy).
Conduct stack testing per EPA Method 1 to 30 / CEN EN 13284 / ISO 9096, validate Continuous Emissions Monitoring System (CEMS) per EPA Part 60 / EU IED Annex V, specify QA/QC per CEMS Performance Specifications.
Conduct dispersion modelling per EPA AERMOD / EU AERMOD derived, compare predicted concentrations against NAAQS (US) / WHO AQG (international), align with permit application threshold per EPA NSR / EU IED BAT.
Compare emissions to permit limits per Clean Air Act Title V / EU IED / national permit, design compliance tracking with monthly / quarterly / annual reporting per EPA AERR / EU EPRTR, align with corporate carbon / ESG reporting.
Identify emission reduction opportunities, process modification (ISD), end of pipe (scrubber, baghouse, RTO / RCO / TO, SCR / SNCR), align with EU IED BAT Reference Documents (BREFs) and US EPA MACT standards.
Air Emissions Inventory in full scope
Value of Air Emissions Inventory and Dispersion Modelling
- We protect your workers and the surrounding community from acute exposure
- We identify the high impact emission sources that warrant control
- We support emergency planning for release scenarios
- We strengthen your fenceline air quality programme
- You satisfy the CPCB, US EPA and EU IED stack standards
- You hold modelling evidence for your permit applications
- You document compliance with the national ambient standards and the WHO guidelines
- You support cap and trade and emissions trading scheme reporting
- We identify leaking and fugitive sources through leak detection and repair
- We optimise your stack height and dispersion design
- We target emission control retrofits at the highest impact sources
- We strengthen the quality assurance on your continuous monitoring data
- We target emission control capital to maximise your compliance return
- You avoid fines and consent order penalties
- You reduce the cost of fenceline community complaints
- You support green and ESG linked finance pricing
Codes & standards we work to
Triggers that signal the need
Where Air Emissions Inventory and Dispersion Modelling applies
Process chemical plants, specialty chemical sites, and industrial parks requiring EHS management systems.
Upstream, midstream, and downstream facilities with complex EHS and regulatory requirements.
cGMP regulated facilities requiring integrated EHS, occupational hygiene, and sustainability programmes.
Extractive industry operations with dust, noise, chemical, and environmental compliance obligations.
Power plants, renewable energy facilities, and utilities with environmental permit obligations.
Manufacturing sites requiring chemical safety, waste compliance, and ESG reporting programmes.
Tangible deliverables
- An air emissions inventory report
- AERMOD and CALPUFF dispersion model files and plots
- A stack design and height recommendation
- A hazardous air pollutant and odour assessment
- A review of your continuous monitoring data quality
- An emission reduction action plan
Ready to start your project?
Speak with our team to scope an engagement tailored to your facility, regulatory context, and lifecycle stage.