Queensland Guidelines: Meat Chicken Farms - Department of ...

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plume’ from any neighbouring facility overlaps the ‘odour plume’ from the facility being assessed, cumulative odour impact is recommended and the neighbouring facility should be included in the assessment. It is suggested that if the neighbouring facility’s calculated ‘odour plume’ from the separation distance formula (Section 2.3) overlaps, then the calculated separation distances and buffer zones will need to be increased by 50 per cent (i.e. multiply the distance by 1.5). If the calculated separation distances are likely to impact on sensitive land uses, then odour modelling is required to determine variable separation distances (Section 2.6), with all facilities included. The S-factor formula for calculating separation distances should not be used if there are other significant odour sources on-site. These may include long-term spent litter storages or composting facilities. In order to determine separation distances for these developments, site specific odour dispersion modelling assessment is required. A 2.6 Plume dispersion modelling Where initial separation distance estimates from the S-factor formula approach (refer to section 2.3) are inadequate, and there is reason to believe that site-specific factors may favour the development of the proposed farm or the farm is greater than 300 000 birds, it is recommended that plume dispersion modelling be conducted. This should entail a modelling-based study along the lines of the methodology set out in the guideline 'Odour Impact Assessment for Developments' (Environmental Protection Agency, 2004b). This will include: estimation of hourly varying emission rates based on factors such as bird numbers, bird age, ventilation (or ambient temperature) and preferably design and management factors. An example of odour emissions modelling that incorporates design and management factors is contained in Ormerod & Holmes (2005). More information is provided in the report ‘Best Practice Guidance for the Queensland Poultry Industry – Plume Dispersion Modelling and Meteorological Processing (PAE Holmes, 2011)’ use of site-specific meteorological data, obtained either through a suitably configured and sited on-site weather station, or from a recognised meteorological model (e.g. The Air Pollution Model [TAPM], developed by CSIRO). In the case of data derived from a simulation model, evidence of suitable model settings and validation of model performance in the region is necessary. Also, even short-term deployment of a weather station on site can help to confirm behaviour of important conditions such as drainage flows, and is recommended. Recommendations on meteorological data for use in odour assessments have been produced for the pig industry and are relevant also to meat chicken farms (Pacific Air & Environment, 2003a) additional guidance regarding surface roughness factors for use in dispersion modelling can be found in the separate report ‘Best Practice Guidance for the Queensland Poultry Industry – Plume Dispersion Modelling and Meteorological Processing (PAE Holmes, 2011)' use of a suitable plume dispersion model - refer to ‘Best Practice Guidance for the Queensland Poultry Industry – Plume Dispersion Modelling and Meteorological Processing (PAE Holmes,2011)’ appropriate configuration of odour sources in the dispersion model. Consideration should be given to the best parameterisation of the odour sources in the model, taking into account the fact that exhaust air is normally vented horizontally but may differ in temperature from the ambient air significantly at times, resulting in buoyant effects in the near field. Such behaviour may be significant in relation to impacts at sensitive sites, especially if they are within 500 metres or there is complex terrain. Refer to ‘Best Practice Guidance for the Queensland Poultry Industry – Plume Dispersion Modelling and Meteorological Processing (PAE Holmes, 2011)’. Queensland Guidelines Meat Chicken Farms 54
In addition, modelled odour levels should be assessed against the following criteria: 2.5 OU, 99.5%, 1 hour average for a sensitive land use in a rural zone 1.0 OU, 99.5%, 1 hour average for the boundary of a non-rural zone. Note: The stringent recommendation for a non-rural zone takes into account a risk-based odour assessment procedure, such as that used in New South Wales. The value of 1 OU (99.5%, 1 hour average) is approximately equivalent to the odour performance criterion for urban areas in New South Wales (2 OU, 99%, 1 second). This recommended impact criterion is significantly more stringent than the ‘default’ odour criterion generally used in Queensland, as set out in 'Odour Impact Assessment for Developments' (Environmental Protection Agency, 2004b). Where local governments require independent third party reviews of any air quality reports submitted. Dispersion modelling and associated odour impact assessment should be conducted by a consultant based on the ‘Best Practice Guidance for the Queensland Poultry Industry – Plume Dispersion Modelling and Meteorological Processing (PAE Holmes, 2011)’. Queensland Guidelines Meat Chicken Farms 55
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Department of Agriculture, Fisherie
Page 3 and 4: © State of Queensland, Department
Page 5 and 6: Appendix 2 - Calculating separation
Page 7 and 8: The guidelines are not designed to
Page 9 and 10: 2.2 State Planning Policies A state
Page 11 and 12: The idea of seeking pre-lodgement a
Page 13 and 14: consider the standard criteria iii
Page 15 and 16: After deciding the application, the
Page 17 and 18: Performance criteria P1 Meat chicke
Page 19 and 20: Torres Strait Islander Cultural Her
Page 21 and 22: supplementary plantings to minimise
Page 23 and 24: A6 The base of all sheds is elevate
Page 25 and 26: 5.2 Key environmental management pr
Page 27 and 28: 5.2.4 Community liaison and complai
Page 29 and 30: Where possible shed cleaning should
Page 31 and 32: A8 Off-site bird disposal: Dead bi
Page 33 and 34: Where possible spreading of spent l
Page 35 and 36: Bibliography Aboriginal Cultural He
Page 37 and 38: Nature Conservation (Forest Reserve
Page 39 and 40: Definitions Advice agencies - Defin
Page 41 and 42: Material change of use - Defined in
Page 43 and 44: Appendices Appendix 1 - Fixed buffe
Page 45 and 46: Category 3: Spent litter that has b
Page 47 and 48: Separation distances for the meat c
Page 49 and 50: Valley drainage zone - 1.2 1.0 (Bro
Page 51 and 52: showed that it is not feasible to d
Page 53: This is less than the actual distan
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