RESPONSE TO FURTHER ADVICE - ADG1808.25 Dewatering Management Plan_Rev0_07.05.25 · MCU25/0054

                                                                                                   ADG Consulting Pty Ltd


2        Site characteristics
2.1      Property description
         The site comprises a single parcel of land described as Lot 3 on RP63813, situated at 20 William Street,
         Noosaville, Queensland. The site is rectangular in shape with an area of 551 m2 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             Residential properties, then Noosa River.

                    East             Residential properties, then Russell Street, then Noosa River Holiday Park.

                   South             Residential property, then Noosa Parade, then Noosa River.


                   West              William Street, then residential properties, then Howard Street.

2.3      Topography
         The site is rectangular in shape and 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 Pleistocene aged (‘Qpe’) comprising sandy mud,
         muddy sand, minor gravel: estuarine channels and banks. The dominant rock type is identified as
         stratified volcanic and metamorphic as referenced through detailed surface geology (accessed via
         Queensland Globe online, 30 April 2025).

         The site is mapped within the Atlas of Australian Soils (‘Ca10’, accessed via Queensland Globe online, 30
         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 map categorises the site as ‘SDL’ or ‘Disturbed land with probability
         of ASS’, 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, 30 April 2025).
2.5      Hydrogeology
         A search of groundwater bores licensed by Queensland Department of Regional Development,
         Manufacturing and Water (DRDMW) was conducted on 30 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.

         As such, impacts on local groundwater users are not anticipated as a result of the proposed dewatering
         activities on the site. Based on the local geology and topography, and the site’s proximity to 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 and/or the Pacific Ocean, therefore saline
         groundwater conditions are anticipated, and additional saltwater intrusion is likely to occur during
         dewatering.




    ADG1808.25 Dewatering Management Plan_Rev0_07.05.25                                                                Page 3