Document ID: chunk:federal_register_of_legislation:F2018L00053:body:0:p28
Version: federal_register_of_legislation:F2018L00053
Segment Type: other
Provision Reference: 
Character Range: 70249–73156

Lilly Pilly should be protected;
  * The fern allies should be protected by ensuring spraying or clearing of plants on the cliff edge does not occur;
  * The fern allies be identified with appropriate interpretive signage;
  * Bush regeneration should be carried out on the weedy areas on the sides and top of the plateau;
  * The maintenance of gardens should ensure that exotic species are not allowed to invade the regenerated areas;
  * A vegetation management plan may be appropriate to ensure suitable species are planted in the correct locations, to ensure weeds are controlled and bushland areas will becomes self sustaining;
  * Fire should not be used as a bush regeneration technique;
  * A nesting area at the western corner of the Northern apron should be dedicated for a limited population of Silver Gulls to ensure the viability of the Silver Gull colony; and
  * Insect killing lights (bug zappers) should not be used on the island so that a food supply for bat species is maintained.
Cockatoo Island is one of many sites in Sydney Harbour that serves as a nesting point for Silver Gulls. The population of gulls on the island are aggressive and in some areas their excrement – which is acidic – is causing damage to the building fabric. The Harbour Trust will investigate ways of controlling the population of gulls and will liaise with other relevant stakeholders in relation to this.

Site Contamination
The Island has undergone an extensive program of remediation, however understanding the history of ship building and engineering on Cockatoo Island is key to appreciating the historical environmental condition of the island. Contamination on the island has resulted from the previous land filling and waste disposal practices as well as the spillage and release of chemicals and materials. Consequently, various types of contaminants have been reported in soils, surface-water, groundwater and near shore sediments. Hazardous materials were also associated with the various buildings and structures, some pavements and other building surfaces.
Extensive assessment of contamination on Cockatoo Island was carried out following the closure of the Dockyard in 1991. The Cockatoo Island Environmental Characterisation report, prepared by the Cockatoo Island Rehabilitation Consortium (CIRC) provides a useful review of contamination on the island at that time.
Since assuming ownership of the island, the Harbour Trust has commissioned specialist consultants to conduct an independent environmental audit and prepare a draft Site Audit Report (SAR) for Cockatoo Island. Environmental studies, Remediation Action Plans and Validation Reports have also been prepared for parts of the site. A remediation and environmental management strategy has also been developed, which was based on the previous assessment reports and the recommendations provided by the audit. The remediation strategy