Document ID: chunk:federal_register_of_legislation:F2018L00053:body:0:p99
Version: federal_register_of_legislation:F2018L00053
Segment Type: other
Provision Reference: 
Character Range: 436139–439200

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 of the island will be implemented to prevent any further contamination of sediments.
Important considerations are:
  * Remediation of former stormwater and sewer system wastes as described above;
  * Implementation of appropriate dust, sediment and erosion controls during remediation and civil work; and
  * Pollution controls systems and requirements for managing potential discharges from future site activities, such as boat maintenance and cleaning.
Management will also include implementing controls such as siltation curtains to prevent the spread of contaminated sediment when the Sutherland Dock caisson is moved. Should either of the dry docks be recommissioned, residual sediments within the docks will require removal, dewatering and disposal. A risk based approach, informed by an environmental assessment, will be implemented.
Specific works for each precinct will be documented in Remediation Action Plans (RAPs). The RAPs will detail further remedial works necessary for each area to achieve the following objectives:
  * Protection of human health;
  * Minimisation of ongoing active management of remaining contamination;
  * Cost effectiveness; and
  * Protection of heritage, cultural and natural values.
An outline of requirements for each area is provided as follows:

Plateau Area
The plateau area requires separate consideration, due to the lesser extent of fill materials and the presence of existing landscaped/grassed areas and heritage structures. Gross wastes, such as general waste debris, waste piles and asbestos-containing materials were removed and disposed of in 2005. Non sealed areas of the Plateau were stabilised with clean topsoil and grass or rolled VENM gravels, which is considered protective for short term visitation.
Remediation of soils in grassed or landscaped areas that contained metals (mainly lead), and PAH contamination exceeding appropriate risk based criteria for the proposed land uses (a combination of commercial, short term residential and public open space) has been carried out in accordance with the area specific RAP. Where soils were required to be removed, this was carried out to maximum 0.5m or bedrock and replaced with clean soil. Building slabs or pavements were considered to provide suitable containment for contaminated soils in these areas.

Southern Apron
A hazardous materials removal and abatement program has been carried out for buildings located to the west of the patrol boat jetty, and is being carried out for the remaining buildings and structures in this area. This includes removal and disposal of remaining chemicals and dangerous goods.

Eastern Apron
A hazardous materials removal and abatement program has been carried out for all buildings in this area. The existing capped