Attachment C - Engineering Technical Note · 132008.1128.02

WATER & WASTEWATER NETWORK INVESTIGATION | BLUE CARE




1 Introduction
Calibre Professional Services Pty Ltd (Calibre) have been engaged by Blue Care to prepare this Water Supply and Wastewater
Network Investigation report for the proposed development at Grasstree Court, Sunrise Beach, Noosa. The site is located within
the Noosa Shire Council (NSC) local government area with Unitywater the responsible distributor-retailer water authority.

The minor amendment application is for a ‘residential aged care facility’ proposed to consist of 122 attached residential
dwellings, 96 bed aged care facility and a central community facility. The proposed ultimate development is shown on the
Smith+Tracey architects master plan included within Appendix A. For clarity and consistency, the development area will herein
be referred to as ‘the site’.

The objective of this report is to document the preferred water and wastewater servicing strategies and demonstrate sufficient
capacity is available to service the proposed development.


1.1     Previous Investigations
The following previous investigations have been prepared in support of the Blue Care Sunrise development:

•     Engineering Report for Development Application Report No. 2383-01, Cardno, June 2004

•     Grasstree Court - Water Network Investigation Report No. 080249-001, WorleyParsons, July 2008

It is the intention that this report supersedes all previous water and wastewater investigations for the proposed development.
The development has an existing development approval (132008.1128) of which Unitywater has included conditions.


1.2     Project Objectives
The primary objectives of this report are to:

•     Estimate water and wastewater Equivalent Person (EP) projections and flows for the site;

•     Develop an internal water reticulation network for the proposed site;

•     Develop an internal wastewater reticulation network for the proposed site;

•     Assess capacity and performance of existing and proposed infrastructure in accordance with SEQ D&C Code; and

•     Document the proposed water and wastewater service strategies.

Of particular interest for this investigation is to amend condition 72 of 132008.1128 which limits firefighting flows to 15 L/s. This
report seeks to demonstrate that 30 L/s can be achieved without causing detrimental impacts to existing water network
customers.


1.3     Unitywater SAN
The Service Advice Notice (SAN) issued by Unitywater on the 6th of September 2018 (Appendix B) prescribed that a water
network analysis was to be undertaken to assess impacts of the proposed development on existing network conditions.

The SAN indicated that a wastewater network assessment is not required as the existing sewer network has adequate capacity
to cater for demands generated by the proposed development.

Key points from the Unitywater SAN include:

•     Wastewater network analysis not required, existing sewer infrastructure in the area is capable of catering for the demand
      generated by this development;

•     Water supply network analysis required, outlining impacts on existing network that no customer within the current service
      area is disadvantaged by connecting this development to the network; and

•     Water supply network analysis shall cover the Viewland Sunrise DMA (VLSNR DMA).




18-001942-WER01                                                                                                                 Page 1