PR-102995-10 IRR to Council_FINAL_27May14

       3.2   Existing Upstream Catchment
       A separate analysis of the existing developed site directly upstream of the proposed
       lot 103 was completed to ascertain both the existing stormwater discharge off the site
       and the approximate pre-development stormwater discharge. The site area in both
       calculations was considered to be the portion of land directly impacting the
       stormwater flow path through the proposed Lot 103 (refer plan 10234.01_DA03 for
       catchment extents), an area approximately 0.504Ha in size.

        For the pre-developed scenario, a Q10 discharge of 0.163m3/s was established,
       adopting a C10 value of 0.7 and a tc of 11 minutes. In the post-developed scenario, a
       Q10 discharge of 0.253m3/ s was established, adopting a post-developed C10 value of
       0.86 and an assumed tc 6 minutes. (Refer Appendix E for discharge calculations.)

       Considering the disparity between the Q10 values for both the developed site scenario
       and the undeveloped, it is recommended that stormwater detention measures be
       implemented to this catchment to achieve an approximate total detention volume of
       33.8m3 as part of any future material change of use (refer Appendix G for detention
       calculations).

4      SEWERAGE
       It is proposed that a new sewer line be constructed in accordance with Council
       standards (including correct offsets from boundaries and required inspection
       openings) at the location indicated on plan 10234.01_DA.

       A single sewer connection point to service the site will be provided at the location
       indicated on Plan 10234.01_DA02.

       From preliminary calculations it has been assumed that the existing downstream
       sewer system has adequate capacity to cater for flows from the proposed
       development.

5      WATER SUPPLY
       It is anticipated that water supply to the site will be available from the existing
       watermain located on the western side of Gateway Drive. It is proposed that a single
       water connection to this main at the location indicated on Plan 10234.01_DA2 will
       adequately service the proposed subdivision.

       All water reticulation design will be undertaken in accordance with Noosa Council
       requirements.

6      ELECTRICITY AND TELECOMMUNICATIONS
       The proposed development site is currently well serviced with existing electricity and
       telecommunication services available, which we believe will be adequate to cater for
       the proposed development requirements. Only one connection point will be chosen
       for each service provider to the development.

       The proposed development will also be provided with sufficient underground conduits
       to cater for future services.

       It is assumed that during the construction phase the developer with enter into an
       agreement with Telstra and Ergon Energy to provide necessary service connections
       to the site.
INTELARA PTY LTD                                                                    Page 6 of 13
10234.01rb01                                                                              Rev B