Appendix G - Dewatering Management Plan · MCU25/0053.01

                                                                                          ADG Consulting Pty Ltd


4        Water quality objectives
4.1      Receiving environment
         It is proposed to discharge extracted groundwater directly over the revetment wall into the adjacent
         canal network (Noosa River) immediately south of the site (to be confirmed upon commissioning to site).
         The waterway in this location is mapped as a tidal canal, harbour or marina (DES, 2022). The receiving
         environment is connected to the Noosa River which ultimately connects to the Pacific Ocean. The
         following section establishes water quality objectives (WQOs) to ensure that the environmental values
         of the receiving waters are protected and maintained.
4.2      Development of water quality objectives
         WQOs have been developed to support and protect the designated environmental values (EVs) for the
         receiving environment. The WQOs are based on a moderately disturbed level of protection for estuarine
         (marine) waters in tidal canals, constructed estuaries, marinas and boat harbours. The WQOs have been
         developed with reference to the following guideline documents:

              Australian and New Zealand Guidelines for Fresh and Marine Water Quality 2018 (ANZG, 2018).
               Australian and New Zealand Governments and Australian state and territory governments, Canberra
               ACT, Australia, which supersedes Australian and New Zealand Guidelines for Fresh and Marine
               Water Quality, Australian and New Zealand Environment and Conservation Council and Agriculture
               and Resource Management Council of Australia and New Zealand (ANZECC/ARMCANZ). 2000.

              Environmental Protection (Water & Wetland Biodiversity) Policy 2019. Queensland Government.
               2019.

              Guidelines for Managing Risks in Recreational Water. Australian Government, National Health and
               Medical Research Council (NHMRC). 2008.

              Noosa River environmental values and water quality objectives. Department of Environment and
               Science (DES). 2022.

              Queensland Water Quality Guidelines, Version 3, September 2009. 2013. DEHP.

         The Australian and New Zealand Guidelines for Fresh and Marine Water Quality by the Australian and
         New Zealand Environment and Conservation Council and Agriculture and Resource Management Council
         of Australia and New Zealand (ANZECC/ARMCANZ, 2000), has undergone review, with the publication of
         the 2018 version. The revised Australian and New Zealand Guidelines for Fresh and Marine Water Quality
         2018 is a joint initiative between the Australian and New Zealand Governments and Australian state and
         territory governments (ANZG, 2018) and supersedes the ANZECC/ARMCANZ 2000 publication. Where
         ANZECC/ARMCANZ (2000) is referenced, the relevant sections are still relevant and consistent with the
         updated ANZG 2018 publication, as referenced in the ANZG 2018 publication.

         The Queensland Water Quality Guidelines 2009 (DEHP, 2013) was made pursuant to the provisions of the
         Environmental Protection (Water) Policy 1999 (the EPP(Water)), which is a subordinate legislation under
         the Environmental Protection Act 1994 and was developed as the State response to the
         ANZECC/ARMCANZ (2000) Guidelines. This has been further superseded by EPP (Water and Wetland
         Biodiversity) 2019 which provides a framework for:
             Identifying environmental values for Queensland waters, and deciding the water quality objectives
              to protect or enhance those environmental values; and

             Including the identified environmental values and water quality objectives under Schedule 1 of the
              EPP (Water).
         WQOs are long term goals for surface water quality management. They are indicators established for
         receiving waters to support and protect the designated Environmental Values (EVs) for those waters. DES
         (2022) describes that for slightly to moderately disturbed waters, the guideline values should be
         compared with the median of values at a test site, whilst ANZG (2018) stresses that the aquatic ecosystem

    ADG1777.25 Dewatering Management Plan_Rev0_01.05.25                                                     Page 6