Air Quality Impact Assessment – Standby Generation Plant, Melton, East Riding of Yorkshire

Client – Transwaste

Scope – Air quality assessment to support a planning application for a 20MW standby generation plant. Two assessments were undertaken:

  • Screening Assessment of effects on ecological receptors, specifically on the Humber Estuary (SPA, SAC, Ramsar, SSSI), using the SCAIL online tool. This was undertaken at the request of Natural England and to their satisfaction such that they had no objection to the application; and
  • Detailed air dispersion modelling of effects on human health, specifically including effects from a nearby consented biomass plant and a large energy from waste facility which was also in planning. The assessment predicted the concentrations of NO2 at sensitive receptors using ADMS Roads.

Solution – Based on predicted pollutant concentrations, design changes were recommended, including the installation of selective catalytic reduction (SCR) on half of the emission stacks so as to reduce concentrations at sensitive receptors to acceptable limits. The assessment was accepted by the Councils environmental health officer and, subject to a number of planning conditions to ensure the delivery of the proposed mitigation measures, there was no objection.