Air Quality Assessment – Leopold Street, Wigan


Leopold Street, Wigan

REC’s Air Quality Consultants were commissioned to undertake an Air Quality Assessment in support of a planning application for a new residential development in Wigan, comprising of 30 homes. This was in response to concerns from the local authority that potential air quality impacts could occur as a result of the proposed development.

Air Quality Management Area (AQMA)

The development itself is located on a brownfield site, 500m from any major roads. Therefore, the concerns were not in regards future residents, but existing ones in the vicinity of the proposed site. An Air Quality Management Area (AQMA), declared by the council, covers the section of the highway network closest to the site. It was therefore possible that, because the AQMA would provide the main route to the development, that the proposals may cause adverse impacts in the sensitive area as a result of traffic generated by the scheme.

Air Quality Conclusions

REC initially undertook a baseline study in order to determine pollutant concentrations in the vicinity of the AQMA and identify receptors most sensitive to changes in air quality. A dispersion modelling assessment was completed using the software package ADMS-Roads. This allowed the prediction of pollutant concentrations at sensitive receptors due to traffic emissions, both with and without the proposed development in place.

The modelling predicted that the development would not have a significant impact on pollution concentrations within the AQMA. As such, no mitigation was required and it was concluded that the proposals should not be constrained on air quality grounds.