Reference Document - Dewatering Management Plan (For Stamping) MCU25/0053 & OPW25/0074

                                                                                                                          ADG Consulting Pty Ltd


                      2        Site characteristics
                      2.1      Property description
                               The site comprises a single parcel of land described as Lot 0 on BUP10936, situated at 7 Noosa Parade,
                               Noosa Heads, Queensland. The site is rectangular in shape with an area of 1,120m2 and is shown in Figure
                               1, Appendix A.
                      2.2      Surrounding environment
                               The surrounding environment and land use is described briefly in Table 1.

                               Table 1 Surrounding land use and environment

                                       Direction                                                Environment

                                         North            Noosa Parade, then residential properties, then Noosa River

                                                          Noosa Park, then Noosa River, then Noosa Parade, then high‐density properties
                                          East
                                                          (hotels).

                                         South            Noosa River, then residential properties, then Witta Circuit.


                                         West             Residential property, then Witta Circle, then residential/holiday properties.

                      2.3      Topography
                               The site is considered to be relatively level based on its existing use as a residential property.
                      2.4      Geology & soils
                               The surface geology at the site is mapped as being Anthropocene aged man‐made deposits (‘Qhh‐QLD’)
                               comprising gravel, sand and silt; man‐made deposits generally associated with land‐fill or mining (tailings,
                               dumps and rehabilitated areas. The dominant rock type is identified as stratified volcanic and
                               metamorphic as referenced through detailed surface geology (accessed via Queensland Globe online, 17
                               April 2025).

                               The site is mapped within the Atlas of Australian Soils (‘Ca10’, accessed via Queensland Globe online, 17
                               April 2025) as Podzols soils described as well‐drained, bleached A2 horizon and brown or reddish brown
                               B horizon. These soils are generally described as undulating to rolling roughly parallel old dune system.

                               The Acid Sulfate Soils (ASS) 1:100,000 Tweed Heads to Teewah Overlay map categorises the site as ‘SDL’
                               or ‘Acid Sulfate on Disturbed Land’, indicating that the site is likely to contain acid sulfate soils (and
                               potential exists that partial or full treatment may have been undertaken), however the type and depth
                               to ASS is not defined (accessed via Queensland Globe online, 17 April 2025).
                      2.5      Hydrogeology
                               A search of groundwater bores licensed by the Queensland Government was conducted on 17 April 2025
                               via the Queensland Globe online database. The search identified no (0) licensed bores within a 200 m
                               radius of the site and is shown in Appendix B.

                               Based on the local geology and topography, and the site’s proximity to the Noosa River, the inferred
                               groundwater flow is to the south toward the Noosa River. Groundwater beneath the site is expected to
                               be hydraulically connected to the Noosa River, therefore saline groundwater conditions are anticipated,
                               and additional saltwater intrusion is likely to occur during dewatering. Any changes to the salinity levels
                               in the groundwater are anticipated to rapidly return to existing conditions following the completion of
                               dewatering and subsequent rainfall/alluvial percolation.




                          ADG1777.25 Dewatering Management Plan_Rev0_01.05.25                                                             Page 3




Document Set ID: 23735664
Version: 1, Version Date: 12/05/2025