Appendix J - Water Supply and Wastewater Servicing Report

Lutheran Services                                                                                  Page 7 of 15
PF80 - Cooroy Care Farm
24 May 2018                                                                                  Ref. No. 2017.0616




3       POTABLE WATER SUPPLY
        3.1          Proposed Potable Supply
        The proposed potable water supply for the development will be as follows:
        ▪ Harvested roofwater will be the primary water source;
        ▪ A new borewater supply will be established on the site to provide full supply reliability;
        ▪ On-site water storage will be provided to ensure a reliable domestic supply and provide water
          for fire-fighting purposes;
        ▪ All water will be treated to ensure it is safe for use;
        ▪ Treated water will be distributed using a pumped pressurised system.


        3.2          Potable Water Demands
        Based on the population data in Table 2 the estimated residential water demands (excluding
        external uses) are provided in Table 4.
        Note that the assumed water demand of 200 L/EP/day is considered to be conservative
        compared with typical water usage in South East Queensland. As an aged care facility,
        accommodating vulnerable members of the community, many with chronic health issues, a
        secure and abundant water supply is essential. A failure of the supply, either in terms of
        availability or water quality, would be unacceptable.

Table 4 Estimated Residential Water Demands

 Item                                                Assumption        Value
 Design EP                                                             87.5
 Average Day (AD) Water Demand (kL/day)              200 L/EP          17.4
 Annual Demand (ML/yr)                                                 6.3
 Peak Day (PD) Water Demand (kL/day)                 2.5 x AD          43.4
 Peak Hour (PH) Water Demand (L/s)                   5 x AD            1.00




        3.3          Regulation of Private Drinking Water Supplies
        Private Drinking Water Supply
        Where treated reticulated (town) water is not available, an alternative source of drinking water is
        required; this alternative supply is referred to as a private drinking water supply. Currently, under
        the Public Health Act 2005, local government is responsible for the regulation of private drinking
        water supplies.
        The water supply will be designed to meet Council requirements for a Private Water Supply
        Water Risk Management Plan
        From 1 February 2017, the Public Health Act 2005 and the Public Health Regulation 2005 were
        amended to improve water risk management practices in healthcare and aged care facilities.
        These amendments establish a legislative framework to improve the management and control of
        health risks associated with the supply and use of water in hospitals and residential aged care
        facilities (in particular health risks associated with Legionella bacteria) and provide for greater
        public transparency of water testing activities being undertaken by these facilities.