The Regional Air Quality Management Plan and Proposed Natural Resources Plan contain rules around discharging contaminants into the air. The regional plans implement Section 15 of the Resource Management Act 1991 and the National Environmental Standards for Air Quality regulations that were passed in 2004.
Where the permitted activity rules set out in the regional plans cannot be met, a resource consent is needed for the discharge to air. Air discharge consents may be needed in industries such as:
Abrasive blasting and spray painting
Dust-generating operations such as quarrying and bulk earthworks
Intensive livestock farming
Manufacturing processes, such as chemical and concrete manufacturing
Rendering animal products
Key pollutants of concern include volatile organic compounds (VOCs), particulate matter (PM10and PM2.5), oxides of nitrogen, carbon monoxide, sulphur dioxide, and any other hazardous air pollutants. Odour may also be a concern in some instances.
Consent applicants may be required to undertake dispersion modelling of their proposed emissions as part of an Assessment of Environmental Effects (AEE) submitted with a consent application. Dispersion modelling is used to predict the spatial extent and magnitude of ground level concentrations of air pollutants due to the discharge of emissions from an industrial process.
Meteorological data is a component of dispersion modelling. Greater Wellington Regional Council holds meteorological datasets for nine domains in the Wellington region. These are CALMET files which are suitable for CALPUFF dispersion modelling.
Request a copy of the dataset that is relevant to your location, along with a user guide for the datasets, by emailing email@example.com with the subject line: Request for GWRC meteorological datasets for air discharge consents.
The following Ministry for the Environment documents provide some helpful guidance for air discharge consent applicants:
Assessing Discharges to Air from Industry
This guide outlines good practice recommendations for assessing air quality in New Zealand, mainly for the purpose of resource consent applications. It provides a practical and reasonable approach to managing…
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This guide provides information on how to assess and manage dust emissions from sources such as quarrying, aggregate crushing, abrasive blasting, sealed and unsealed surfaces, and material stockpiles.
Read more here