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Figure 8-1: Tier 3 assessment process

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Tier 3 assessment of local impacts

1. Consult regional council

2a. Estimate traffic data (+ projections)

  • Traffic monitoring
  • Traffic modelling

2b. Estimate fleet composite emission factors

  • Fleet model or local monitoring to characterise fleet
  • Emission factor model
  • Estimate projects - 10 to 20 years

3. Results in emissions estimate for the proposed project.

4. Dispersion modelling

  • Background air quality and local meteorology
  • Location of receptors
  • Local topographic features

5. Exposure estimate

6. Assessment of the potential effects by comparison with air quality criteria

  • Mitigation where necessary, and start process of consulting with regional council (step 1) again.
  • Health risk assessment where necessary