Response to oustanding issues Animal Husbandry MCU12/0184

                                                                                            ~
                                                                                        Callaghan & Toth

Sediment Basins wet coarse Sediment Basins will be required to pre-treat runoff from the
Bunded Poultry litter Composting areas:


      .    The sediment basin area required for the 70m long bunded composting area is 19m2
      .    The sediment basin area required for the 120m+87m long bunded composting area
           is 51.1m2


3.2.3      Rainfall Data


The meteorological data used for the MUSIC Model was the data for Cooroy from 01/01/92-
31/12/01. The mean Annual Rainfall for Cooroy                       92   -
                                                                          02   =   1585mm


The MUSIC Modelling Guidelines for South East Queensland             -
                                                                         Version 1 December 2010
details that Cooroy data for 1973 to 1983 should be used. This data has an annual average
Rainfall of 1600mm. It is considered that the 10 year period from 1992 2002 has a   -




relatively close mean annual Rainfall to the recommended 10 year period and as such is
acceptable to use in this case.

3.3        MUSIC Modelling Results


The MUSIC modelling program has been used to investigate the performance of various
treatment options in the treatment train. MUSIC version 5 is capable of incorporating
rainwater re-use in the model. These features have been used in making comparisons
between different stormwater management systems for this report.



3.3.1      Water Quality Objectives


This model meets the pollution load reduction target as detailed in Water by Design Deemed
to Comply Solutions          -
                                 Storm water Quality Management (South East Queensland) version
1.0   -
          Table A-2. The following have been included in Appendix 3.
               .   The treatment train effectiveness for the system.
               .   The MUSIC Version 5 Summary Report.
The MUSIC modelling results indicate that the proposed additions to the farm can be treated
effectively by the proposed stormwater treatment train and this system will achieve
reductions in pollutant loads as detailed in Tables 3.2 and 3.3 below.


           TABLE 3.2:          COMPARISON OF LOAD REDUCTIONS FOR SHEDS & ROADS


              Parameter                                  MUSIC       POLLUTANT
                                                     REDUCTION               LOAD
                                                         RESULT      REDUCTION
                                                                         TARGETS
              Flow 34%
              Total Suspended Solids                      78% 80%
              Total Phosphorous                           59% 60%
              Total Nitroqen                              53%                45%
              Gross Pollutants                            54%




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1209 Animal Husbandry   -
                            Top Forestry Rd. Ridgewood                               SWQMP_REV_3
September 2013