environmental impact statement kilmainhamwood compost facility ...

5361- Kilmainhamwood Compost Facility Extension- EIS
9.2 ODOUR
9.2.1 Introduction
Odour Monitoring Ireland were commissioned to perform an odour assessment and dispersion
modelling impact assessment of the existing facility design and the proposed facility design (existing
facility and proposed extension including upgrading of odour abatement system) located in
Kilmainhamwood, Nobber, Co. Meath (Figure 9.2). An odour impact assessment of the existing and
proposed composting facility design was performed in order to determine the potential risks of odour on
the surrounding air quality. The existing composting facility is fully enclosed and the only scheduled
emission(s) occur from the odour control system exhaust points. Odour sampling and measurement in
accordance with the EN13725:2003 was performed on the exhaust of each biofilter system 1 and 2.
For the existing facility impact, the gathered odour emission data including source characteristics was
utilised in conjunction with dispersion-modelling techniques (i.e. AERMOD Prime 07026) to assess any
odour impact on the surrounding area in accordance with established odour impact criterion. For the
proposed upgrade facility design, the improved odour treatment design was utilised in conjunction with
guaranteed odour emission data to ascertain the potential level of odour impact on the surrounding
population in the vicinity of the facility. All odour dispersion modelling was performed in accordance with
the recommendations contained within the Irish and UK EPA guidance documents “Odour impacts and
odour emission control measures for intensive agriculture”, EPA, 2001 and H Horizontal Guidance
notes Parts 1 and 2, UK Environment Agency. AERMOD Prime was used to perform dispersion
modelling assessment due to the significant probability of on site building wake effects (i.e. large
buildings and low emission points). AERMOD Prime is the model mechanism preferred by the
Environmental Agency and USEPA. Five years of consecutive meteorological data (Clones 2002 to
Clones 2006 inclusive) was used within the dispersion modelling assessment to provide statistically
significant prediction over 5 years.
For inspection purposes only.
Consent of copyright owner required for any other use.
This report will describe the methodologies used to ascertain the existing levels of odours at the facility
and provide information on the proposed odour treatment design for the new facility.
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