Attachment C - Engineering Technical Note · 132008.1128.02

WATER & WASTEWATER NETWORK INVESTIGATION | BLUE CARE




2 Assumptions
This section provides an overview of the key assumptions made in developing the water and wastewater service strategies to
support the proposed minor amendment application.


2.1         Information Sources
The following information was provided by Unitywater in support of the water assessment undertaken for the proposed
development and is referenced within this report.

•      InfoWater water network model entitled ‘UW_Noosa_WSP_20180920_ basedOn_2018053’ (02 October 2018);

For the water network analysis it has been assumed that the information provided by Unitywater is the most accurate and
appropriate at the time of reporting.


2.2         Desired Standard of Service
Assessment was undertaken in accordance with the South East Queensland Water Supply and Sewerage Design &
Construction Code (SEQ D&C Code) for Unitywater Desired Standards of Service (DSS). The key DSS criteria adopted for this
water network assessment are as follows:


2.2.1         Water
•      Average Day Demand (AD): 230 L/EP/Day;

•      Non-Revenue Water (NRW): 30 L/EP/Day;

•      Residential Fire Flow: 15L/s for 2 hours;

•      Commercial Fire Flow: 30 L/s for 4 hours;

•      Minimum Service Pressure (Peak Hour Conditions): 22m;

•      Minimum Residual Pressure (Fire Flow Conditions: 12m; and

•      Desired Maximum Service Pressure: 55m.


2.3         Projected Development Yield
Development demands for the proposed site have been estimated in accordance with the Smith+Tracey architects master plan
Drawing No. 18030 included within Appendix A. Water and wastewater demands calculated for the site are outlined in Table
2-1.


Table 2-1: Projected Development Demands

             Land use                     Quantity                  EP/Dwelling                Total EP           Total EP + 10%
                                                                                                                   Contingency
    Attached Dwellings                 122 dwellings                     1.8                     219.6                   242

    Aged Care Facility                    6,565 m2              3.56 EP/100m2 GFA                233.7                   257

    Community Facility                    2,985 m2              3.13 EP/100m2 GFA                 93.4                   103

    Total                                                                                        546.7                   602
Note:        1) Aged Care Facility has been assumed to be consistent with health land use as per Unitywater Netserv Plan Part A;
             2) Community Facility has been assumed to be consistent with community land use as per Unitywater Netserv Plan Part A; and
             3) Total has been rounded to the nearest whole number.


A total of 546.7 EP has been estimated for the development. For modelling purposes, a 10% contingency has been applied and
602 EP has been adopted for this investigation.



18-001942-WER01                                                                                                                       Page 3