background air quality data source and methodologies used for generating air quality statistics and reliability of data; assumptions and uncertainties. Specific requirements for the assessment of air quality, odour or health risk are described in sections 5, 6 and 7 respectively. 4.1 Air dispersion model selection Air dispersion modelling is to be used to predict air pollutant concentrations at sensitive uses or sensitive zones, using an air dispersion model which is suitable for the task. Dispersion models that may be used in preparing an air quality impact report are AUSPLUME, CALPUFF, TAPM, AERMOD, fluid models and specialised dispersion models. The air quality impact report is to justify why the dispersion model was selected for the particular application and the features of the model which make it appropriate for the application, taking into account whether the plume can be best represented by steady-state or non-linear behaviour and whether the model can adequately treat the situation to be modelled, including coastal effects, terrain and building wakes. In the event that more than 1 model is required to fulfil all the requirements of the assessment, the justification is to be provided for each model selected. 4.1.1 AUSPLUME The most recent official version of the EPA Victoria model AUSPLUME can be used for most simple, near-field applications, where coastal effects and complex terrain are of no concern. AUSPLUME is specifically not to be used in the following applications: complex terrain and non-steady-state conditions, in particular where the height of any receptor exceeds the lowest release height, including balconies and air conditioning intakes; buoyant line plumes, such as hot roof vent emissions; coastal effects such as fumigation; high frequency of stable calm night-time conditions; high frequency of calm conditions; inversion break-up fumigation conditions. Unless otherwise stated, the default options specified in the AUSPLUME Technical User’s Manual are to be used with AUSPLUME, unless a justification is made to and accepted by the Council, for any departure from the default options. The following settings are to be used when AUSPLUME: Egan half-height approach to account for terrain effects; PRIME method to account for building wake effects; Horizontal dispersion curves are to use:
background air quality data source and methodologies used for generating air quality statistics and reliability of data; assumptions and uncertainties. Specific requirements for the assessment of air quality, odour or health risk are described in sections 5, 6 and 7 respectively. 4.1 Air dispersion model selection Air dispersion modelling is to be used to predict air pollutant concentrations at sensitive uses or sensitive zones, using an air dispersion model which is suitable for the task. Dispersion models that may be used in preparing an air quality impact report are AUSPLUME, CALPUFF, TAPM, AERMOD, fluid models and specialised dispersion models. The air quality impact report is to justify why the dispersion model was selected for the particular application and the features of the model which make it appropriate for the application, taking into account whether the plume can be best represented by steady-state or non-linear behaviour and whether the model can adequately treat the situation to be modelled, including coastal effects, terrain and building wakes. In the event that more than 1 model is required to fulfil all the requirements of the assessment, the justification is to be provided for each model selected. 4.1.1 AUSPLUME The most recent official version of the EPA Victoria model AUSPLUME can be used for most simple, near-field applications, where coastal effects and complex terrain are of no concern. AUSPLUME is specifically not to be used in the following applications: complex terrain and non-steady-state conditions, in particular where the height of any receptor exceeds the lowest release height, including balconies and air conditioning intakes; buoyant line plumes, such as hot roof vent emissions; coastal effects such as fumigation; high frequency of stable calm night-time conditions; high frequency of calm conditions; inversion break-up fumigation conditions. Unless otherwise stated, the default options specified in the AUSPLUME Technical User’s Manual are to be used with AUSPLUME, unless a justification is made to and accepted by the Council, for any departure from the default options. The following settings are to be used when AUSPLUME: Egan half-height approach to account for terrain effects; PRIME method to account for building wake effects; Horizontal dispersion curves are to use:
AirQualityPSP.docx