Ridgewood_12-002_Odour_AdditionalInfoRequest_L181BH_110913

Mr David Milligan, W Donald Milligan Pty Ltd                                  11 September 2013
Re: Response to Sunshine Coast Regional Council Outstanding Issues Request – Proposed Poultry
      Growing Sheds, Ridgewood                                                 L18113/BH/12-002



        Analysis undertaken by MWA Environmental indicates that winds from the
        northeasterly to southeasterly sector are present in the order of 56% of hours
        between 6am and 6pm. Seasonal and annual wind roses extracted from the
        CALMET meteorological model output for the 6am to 6pm period are included
        as Attachment 3. The wind roses demonstrate that there is ample
        opportunity during all seasons for litter to be spread under wind conditions
        that will not result in odour emissions impacting on sensitive receptors.

        Given the spatial constraints of the orchard terraces, litter is expected to be
        spread using a relatively small ground-driven spreader mounted to a small
        tractor. These spreader systems typically have a fairly short broadcast
        distances and velocity which will minimise potential for excessive dust (and
        associated odorous particles) to be released to the atmosphere. The
        vegetated terrace structures will assist in reducing entrainment of litter in the
        atmosphere during periods of high wind speeds. This notwithstanding, it may
        be necessary to dampen the surface of the litter by irrigation during high wind
        conditions to minimise potential fugitive dust (and odour) emissions.

        Development approvals for poultry farms typically include a condition
        requiring the implementation of a Site-Based Environmental Management
        Plan prior to the commencement of use. This Site-Based Environmental
        Management Plan should include management measures to minimise the risk
        of odour nuisance from the spreading of litter, such as:

                •   Spreading of litter within 4 to 5 weeks of clean-out from the poultry
                    sheds to ensure that odour emissions from the spreading of litter
                    do not coincide with peak odour emission periods from the next
                    batch of birds in the poultry sheds.
                •   Maintaining a minimum setback of 50 metres from the southern,
                    eastern and northern property boundaries to minimise potential
                    near-field odour influences on adjacent properties.
                •   Spreading of litter only when prevailing winds are from the
                    northeasterly to southeasterly sector.
                •   Use of appropriate low velocity spreading equipment to minimise
                    release of dust (and associated odours) into the atmosphere.
                •   Dampening of applied litter during high wind speed periods to
                    minimise potential fugitive dust (and odour) emissions.
                •   Corrective actions in the event of odour nuisance, including:
                           Review of spreading locations, methods and practices to
                            identify measure to reduce impacts; and
                           If necessary, export of litter from site if noted to generate
                            excessive odour emissions.




                                              8