Volume 2 - Code Responses · 132006.823

                    COLUMN 1                                        COLUMN 2                                            ASSESSMENT
              SPECIFIC OUTCOMES                     PROBABLE SOLUTIONS (if code assessable)
                                                                                                       The findings of the WBM Oceanics Australia
                                                                                                       report are still valid. The impervious areas
                                                                                                       proposed on the site result in water running off
                                                                                                       these areas more rapidly than it would run off an
                                                                                                       impervious area. When the peak discharge in the
                                                                                                       drainage line occurs, the peak discharge from the
                                                                                                       subject site has passed. The result is that the
                                                                                                       overall peak flow in the drainage line is reduced by
                                                                                                       the development as the flow is being spread over a
                                                                                                       longer time period. Detention storage is not
                                                                                                       required on the site.

                                                                                                       Downstream water quality will be protected by the
                                                                                                       provision of permanent devices such as GPT s and
                                                                                                       oil and grease arrestors in drainage lines as well as
                                                                                                       vegetated swales in overland flow paths to collect
                                                                                                       and remove contaminants from the flow. Water
                                                                                                       quality will be enhanced by the significant
                                                                                                       revegetation program being adopted on the site.

                                                                                                       Stormwater drainage planning, design and
                                                                                                       construction will be in accordance with the
                                                                                                       Queensland Urban Drainage Design Manual.
O7                                                S7.1
Roads and stormwater drainage infrastructure is   Roads and stormwater drainage infrastructure is      Development will comply with the appropriate
constructed                                       constructed in accordance with                       design criteria.
a) in accordance with appropriate engineering     a) Sections 2, 3 and 4 of PSP5 Engineering Design
   standards; and                                    Standards Roads, Drainage and Earthworks;         Accessways will be designed to meet the principles
b) to minimise adverse environmental impacts,     b) Queensland Design Code for Residential Streets;   of suitable access, durability and safe passage as
   including from run-off and erosion.            c) AUSTROADS; or                                     outlined in Sections 2 and 3 of Noosa PSP5


                                                                                                                                          Volume II: Code Responses

                                                                                                                                          Viridian Noosa Project
                                                                                                                                          Viridian Stage 3

Transport, Roads and Drainage Code                                                                                                        11 April 2006     Page 107