2184Response_OM13_222

Mr David Milligan, W Donald Milligan Pty Ltd                                   29 November 2013
Re: Response to Sunshine Coast Regional Further Information Request of 19 November 2013 – Noise,
      Dust & Odour Issues - Proposed Poultry Growing Sheds, Ridgewood
                                                                               L26013/BH/12-002



    GHD Covered Windrow3:                             Average 0.4 OU/m2/second                 for
                                                           covered windrow
                                                      Peak     1.2 OU/m2/second for           top
                                                             section of covered windrow
    ERM Gerogery4:                                    Varying odour emission from Week 1
                                                            to Week 5 including flux hood
                                                            correction, as follows:

Table 1: Surface Odour Emission Rate Derived from ERM Gerogery
         Actual SOER for Full Surface of Stockpiles
         With Flux Hood Correction Factor5

                                                Surface Odour Emission Rate - OU/m2/sec
              PARAMETER
                                             Week 1      Week 2     Week 3     Week 4      Week 5
     SOER Measured by Flux Hood                 7.7          1.1      0.36       0.85       0.07
    Correction for Flux Hood Diversion         13.9       13.9        13.9       13.9        4.6
             Modelled SOER                    107.0       15.3        5.0        11.8        0.3



Whilst the above comparative data does not definitively quantify odour emissions
from the proposed stockpiling activities, the data does indicate that the MWA
Environmental modelled odour emission rates are comparable to published data for
composting windrows, including measurement by wind tunnel instead of flux hood
sampling.

The updated modelling has considered the overall odour impacts from the proposed
development including the following litter stockpile odour emission rate scenarios:

    A. Poultry Sheds Only i.e. no litter stockpiling
    B. Previously applied stockpile odour emission rate of 5.8 OU/m2/second;
    C. Stockpile odour emission rate of 53.3 OU/m2/second based upon the ’10
       times higher’ aged stockpile sample referenced in the SCRC information
       request; and
    D. Stockpile odour emission rates as per Table 1 above (derived from ERM,
       2013) varying from 107 OU/m2/second for Week 1 to 0.3 OU/m2/second for
       Week 5.

The results of the modelling are presented in Attachment 2.



3
  Pollock, T. (2009) Odour Emission rate Measurements on Green-waste Windrows, 19th Int. Clean Air
& Environment Conference.
4
  Resource Recovery Facility – Gerogery - Odour Impact Assessment (Environmental Resources
Management Australia, August 2013) including references to Environmental Impact Statement
(Report Number 31/29006/180436 - Organic Compost Facility Environmental Impact Statement, (GHD,
October 2012)
5
  Correction factors were noted by the author to be likely overestimates due to the method applied


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