Information Request MCU24 0033

Issue – Dewatering Management Plan
Pacific Geotech’s Geotechnical Investigation reports that groundwater was encountered at
depths of 1.3m. A Dewatering Management Plan has not been submitted as part of the
application material.
Information Required
6.   Provide a site-specific Dewatering Management Plan that demonstrates how
     groundwater encountered during basement excavations will be managed. The
     Dewatering Management Plan must:
     a.    be prepared by a suitably qualified person who is experienced in Acid Sulfate Soils
           Management;
     b.    adhere to the recommendations made in Pacific Geotech’s Geotechnical
           Investigation (PG-10243) dated June 2023; and
     c.    provide recommendations and guidance on all excavations and dewatering works
           below the elevation of 5m AHD.


Issue – Acid Sulfate Soils
The subject site is located within Council’s mapped Acid Sulfate Soils overlay (<5m AHD). An
Acid Sulfate Soils Management Plan has not been submitted as part of the application
material.
Information Required
7.   Provide a site-specific Acid Sulfate Soils Management Plan. The Acid Sulfate Soils
     Management Plan must be prepared by a suitably qualified person and include, but not
     be limited to:
     a.    design measures necessary to prevent any oxidation of the Potential Acid Sulfate
           Soils or transfer of Acid Sulfate Soil leachates via dewatering of groundwater; and
     b.    any other matters necessary to prevent the oxidation of Potential Acid Sulfate Soils
           or release of Acid Sulfate Soil related water contaminants.


Issue - Earthworks
The submitted documentation proposes approximately 3m of cut to accommodate the
construction of a basement garage. The extent and methodology of the earthworks is unclear
as an Earthworks plan has not been provided as part of the submitted application material.
Information Required
8.   Provide an Earthworks Plan demonstrating the extent of the proposed earthworks
     required to carry out the proposed works. The additional plan must be prepared by a
     suitably qualified person (RPEQ – Registered Professional Engineer of Queensland)
     and include, but not be limited to:
     a.    the extent and volume of cut and fill; and
     b.    construction methodology (i.e., contiguous piles, sheet piles, etc.).


Issue – Frontage Works
Noting that the neighbouring properties are serviced by Kerb & Channel, it is unclear if any
frontage works (i.e., kerb & channel) are being proposed as part of the redevelopment of the




                                                                                       Page 3 of 4