Pre-Request Response Application 132001.210310.1

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           ELECTRONIC TRANSMISSION

              To:                 Stockland                                            CC:                                    Brent Thomas (BC)



              Attention:          Joshua Sondergeld                                    Date:                                  6 June 2012



              Fax No:             email                                                Document Ref:                          F 815573 013.doc



              From:               Damion Cavanagh                                     No. of pages including                  2
                                                                                      this one

             This emaillfax is confidential and may be privileged. If you are not the intended recipient please notify us immediately; you should not copy or
                                                  use it for any purpose, nor disclose its contents to any other person




           Dear Joshua


           RE: DOONELLA NOOSA POLLUTANT EXPORT MODELLING


           Brown Consulting recently requested an update of the pollutant export modelling which consolidates
           the water quality work for the entire development and incorporates changes to the Stage C layout
           due to the link road modifications.


           Using plans provided by Brown Consulting which represents the Link Road revised estimates of
           available stormwater treatment system sizes have been developed. These were updated within the
           existing site MUSIC model. Generally the incorporation of the Link Road fully within the Stockland
           site has resulted in there being a loss of over 800m2 available for stormwater treatment. This is a
           significant percentage of the total treatment area that was available for Stage C,

           Performance of Site Stormwater Management System


           Remodelling of the performance of the site (entire 65 ha development which includes the 34,S ha
           external buffer) is provided in Table 1,


             Table 1 Mean Annual Pollutant Loads                         -
                                                                             Base Case (Modelling Period 1/1/1998 -1/1/2002)

                                                                                      Base Case
                                                          Parameter
                                                                                   (ForestedSite)
                                                         Flow (MUYr)                       426

                                                          TSS (kg/yr)                    36,500
                                                           TP (kg/yr)                      37,0
                                                           TN (kg/yr)                      422




           With the incorporation of stormwater quality controls in all stages the results are shown in Table 2,