Referral Agency Response - Planning RAP21 0020 · OPW21/0315

      b.    where otherwise, upon completion of the works associated with the development.
      Any repair work which proposes to alter the alignment or level of existing services and
      assets must first be referred to the relevant service authority for approval.
      Erosion & Sediment Control
19.   At all times, the site must be managed in accordance with Healthy Land and Water
      Erosion and Sediment Control Toolkit for House Builders 2019, available at:
      https://hlw.org.au/download/erosion-and-sediment-control-toolkit-for-house-builders/ .
20.   A construction hold point with a council delegate and supervising RPEQ must be
      established prior to commencement of works under this approval. The hold point must
      be held as soon as reasonably practical and prior to the first rain event forecast following
      initial removal of soil stabilising material on the site. At the hold point inspection, all
      required site entry pad, downslope silt fences and upstream stormwater diversion
      controls must be installed.
      Acid Sulfate Soil
21.   A Geotechnical Engineer or other suitably qualified person experienced with Acid Sulfate
      Soils Management must be engaged at least two prior to the commencement of works
      in order to facilitate design and delivery of Acid Sulfate Soil related conditions in
      accordance with the following National Acid Sulfate Soil guidance documents:
      a. National Acid Sulfate Soils Guidance: National acid sulfate soils sampling and
         identification methods manual, Department of Agriculture and Water Resources,
         Canberra (Sullivan et al, 2018); and
      b. National Acid Sulfate Soils Guidance: National Acid Sulfate Soils Identification and
         Laboratory Methods Manual, Department of Agriculture and Water Resources,
         Canberra; and
      c. the Australian Standard 4969
22.   All excavation and dewatering works below the elevation of 5m AHD must be undertaken
      in accordance a Dewatering Management Plan that is prepared by a suitably qualified
      person, certified by the sites qualified person experienced with Acid Sulfate Soils
      Management and approved by Council prior to the commencement of the works. The
      dewatering plan must be submitted to Council for review a minimum 20 business days
      prior to commencement of works and in particular demonstrate that the construction and
      operational phase of the develo0pment will:
      a.    include an Acid Sulfate Soil and groundwater investigation prepared in
            accordance with the National Acid Sulfate Soil Guidance documents
      b.    identify whether depth of excavations can be reduced where reasonably possible
            to avoid disturbance and oxidation of potential acid sulfate soils below permanent
            groundwater levels;
      c.    not permanently or temporarily extract groundwater that results in the aeration of
            previously saturated ASS;
      d.    not result in potential or previously saturated actual ASS being aerated
      e.    nominate holdpoints during construction to facilitate for certification by the suitably
            qualified person experienced with Acid Sulfate Soils, as well as Council
            Development Engineer to ensure all possible avenues for continual dewatering
            below permanent groundwater level, including around pipework bedding that
            outlet to waterways, are appropriately sealed.




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