Referenced Document - MCU30/0030 · MCU13/0030

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                                                                                 Callaghan & Toth

1.        SUMMARY

The key points of this investigation are as follows:


     1.   Roof water runoff is to be recycled to provide Potable water to toilets and hose cocks.
     2.   Runoff from new access roads, car parks and landscaped areas around the buildings is
          to be cleaned of nutrients and gross pollutants via a Bioretention Basins and then
          released to existing sheet flow within the site.
     3. The increase in pollutant loads due to the increase in impervious areas is to be
          attenuated.
     4. Water saving devices for new fixtures are required.




2.        INTRODUCTION

This report was written as part of an MCU application for Sunshine Coast Regional Council, and
is in accordance with:


     1. Water Sensitive Design Code in the Noosa Plan
     2. The latest Water Sensitive Urban Design Technical Design Guidelines for South East
          Queensland, published by Health Waterways

The site subject to this report is Lot 102 on SP236318 located at 20 Topaz Street, Cooroy
(Refer Site Location Plan Figure 1.1).

The Integrated Water Management Plan undertaken in this project considers the hostel with
associated new access road and new carpark. There is a total new roof area to rainwater tank
of 3574m2, access roads and car parks to Bioretention of (958m2).


In order to receive planning approval from Sunshine Coast Regional Council, this site must
demonstrate that it complies with the Integrated Water Management Guidelines and that the
storm water runoff will not change the surrounding hydrology.


Bioretention basin and below ground roof water tank units are required for the site. These
devices will enable the water quality objectives to be achieved. Water reuse and water use
minimisation are in accordance with the guidelines.


The proposed stormwater treatment train of a Bioretention basin and below ground roof water
tanks will achieve the water quality objectives.


The Model for Urban Stormwater Improvement Conceptualization (MUSIC)has been used to
assess the suitability of various treatment devices and to model existing and predicted pollution
export loads and concentrations.

The rainwater tanks have been sized in accordance with Water by Design Music Guidelines
Version 1, December 2010 for landscaping and the Queensland Development Code MP4.3 for
toilet use.




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1303, Kabara Hostel, Cooroy                IWMP.doc                             January 2013