Pre-Request Response Application 132001.210310.1

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         \\~, BM.T WBM                                                                                         BMT WBM pty Ltd
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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 34.5 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.