It has not been necessary to carry out any new ambient air quality monitoring in the vicinity of the development as sufficient data is already available. Dispersion modelling has been undertaken using the Atmospheric Dispersion Modelling System. This is widely accepted among environmental regulatory agencies as one of the best modelling software packages available. The air quality impact assessment shows that the PM10 contributions within the Air Quality Management Area (0.08 μg/m3) are considered to be insignificant based on NPTCBC's criteria. A number of mitigation measures have been identified to reduce or remove potential impacts. The model predicts that cold weather will cause a visible moisture plume at the top of the stack for 14% of the year and this is predicted to be of minor impact. The residual impact on air quality due to the construction, operation and decommissioning of the Plant has been assessed as insignificant or minor for the various pollutants considered (oxides of nitrogen, carbon monoxide, particulate matter, sulphur dioxide and hydrogen chloride).