Document ID: chunk:federal_register_of_legislation:F2018L00053:body:0:p98
Version: federal_register_of_legislation:F2018L00053
Segment Type: other
Provision Reference: 
Character Range: 433302–436434

and where required remediated, preferably by treatment and/or removal and disposal from the island. Gross contamination may include:
      + Any remaining asbestos materials in surface soils;
      + Concentrated washes in surface soils, such as grit blast wastes or where there is gross hydrocarbon (oil spill) contamination;
      + Contaminated wastes in the form of sediment, sludges or liquid wastes associated with septic systems, tanks or pits of the former stormwater or sewerage systems;
      + Any remaining solid or liquid wastes associated with former machine pits;
      + Potentially contaminated soils in the vicinity of the former substations, ASTs, coal bunkers, workshops, stores and remediation of gross contamination associated with these facilities.
 3. Demolition and remediation of any remaining underground tanks used for storing petroleum products. However, all known underground tanks have been removed and associated contaminated soils remediated.
 4. Capping systems for Cockatoo Island will be designed in accordance with ANZECC (September 1999), 'Guidelines for the Assessment of On-site Containment of Contaminated Soil', taking into account land use considerations and the nature of the fill. Capping systems will be designed to properly mitigate any adverse impacts arising from malodorous soils or volatile soil gas that may arise from the underlying contaminated soils.
 5. Ongoing management requirements of retained contamination will be documented and implemented in accordance with an Environmental Management Plan (EMP), and implemented by the Harbour Trust. The EMP will address management and monitoring of retained contamination, as well as potential environmental impact of projects, leasing or use. The EMP shall also address the ongoing monitoring of groundwater quality on the island.
 6. Remediation will be conducted on a precinct-by-precinct basis, with land use restrictions remaining in place until buildings and land have been remediated and certified for the intended land use.
 7. Review of the remediation process by an accredited independent auditor engaged by the Harbour Trust.

Surface and Groundwater
The Harbour Trust will continue the environmental monitoring program it has established for surface and groundwater on the island. The purpose of this program is to establish an up to date baseline and monitor trends in waters as the remediation and management actions are implemented. It is envisaged that implementation of the above strategy, including removal of potential mobile sources of contamination and appropriate capping design, will contribute to a gradual improvement in surface and groundwater contamination in the long term.

Near Shore Sediments
No active remediation of contaminated sediments surrounding the island has been recommended or proposed at this stage. However, the Harbour Trust will undertake required further assessment of sediments in consultation with the Roads and Maritime Services NSW to confirm management requirements in accordance with NSW DEC and auditor requirements. Regardless of further assessment, remediation and management