Client: AECOM
Skills: Plume rise, Dispersion Modelling
Date:  2012

TRUenergy needed development approval to build a large combined cycle gas turbine power station of up to 1500MW to replace the aging coal fired power station at Swanbank. Due to our reputation for rigorous assesments, AECOM commissioned

Katestone on behalf of TRUenergy to assess the potential local and regional air quality impacts. The Blackstone Power Station is to be located in the Swanbank Industrial Precinct, six kilometres southeast of Ipswich in the Southeast Queensland airshed which is susceptible to photochemical smog.

The local air quality assessment incorporated:

  • Description of the project area and existing air quality
  • Quantification of meteorological parameters that may influence the dispersion of air pollutants
  • Estimation of emissions rates
  • Prediction of ambient ground-level pollutant concentrations by dispersion modelling
  • Assessment of air quality by comparison of predictions with Queensland’s air quality objectives
  • Analysis of meteorological conditions that cause highest ground-level concentrations
  • Plume rise assessment
In SEQ, nitrogen dioxide (NO2) emissions from sources such as power stations can combine with volatile organic compounds to produce photochemical smog under specific conditions. Katestone collaborated with the regulator to agree on the representative smog days and worst case emissions assumptions. Katestone used the TAPM-CTM model to demonstrate that the impact of the new source of NOx on smog would be minimal under worst case conditions and assumptions.

The Blackstone Power Station Development was approved by the Ipswich City Council in August 2012.  Katestone also completed a parallel assessment for AECOM and TRUenergy for the Aldoga Power Station in Gladstone.


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  • Skills ‐ Dispersion modelling, Plume rise