Manly Lagoon Dredging Project - Manly Council - NSW Government

Manly Lagoon Dredging Project – Review of Environmental FactorsPrepared for Manly and Warringah Councilsmaterial is classified, appropriate management options need to be considered, asrequired under the PoEO Act and the associated regulations;All site workers should be made aware of hazards before they enter the site;The proposed works area and contractor’s compound will both be fenced off fromgeneral public access (in accordance with the Technical Specification in AppendixK);Adequate signage for motorists, cyclists and pedestrians should be erected aroundthe site to warn them of the works; andContinuing pedestrian access to the lagoon banks should be safely facilitated aroundthe works area.The Hazards Management Plan must also describe the clean up method to be employed inthe event of an accidental spill. The method for cleaning up accidental spills of ULTIMER7757 must be in accordance with Section 6 (Accidental Release Measures) of the ProductSafety Data Sheet (PSDS) in Appendix I. The polymer will not be stored on site or used insuch a way that would allow the concentration to reach a level which is toxic to fish orinvertebrates, as indicated in Section 12 of the PSDS (Appendix I).Due to the high potential for encountering acid sulfate soils within Manly Lagoon an ASSMPhas been developed (Appendix E), in accordance with the Acid Sulfate Soils Manual(ASSMAC, 1998). The Plan identifies the need for measures to ensure neutralisation of thedredge spoil prior to reuse or disposal, as discussed in Section 5.1. This will be achieved bydosing the dredge spoil with lime. This ASSMP must be followed by the selected contractorand the contractor must ensure their dredging methodology is compatible with and complieswith the standards set out in the ASSMP (Appendix E).An Incident Management Plan should also be prepared for the works and should define anddetail all stop work triggers as identified in this REF. Council’s site superintendent will havethe authority to stop or suspend works at any time, and this decision may be taken inresponse to a pre-determined stop work trigger as defined in the Incident Management Plan,at their discretion, or on the advice of any independent advisor.WasteA Waste Management Plan will be required prior to commencement of the proposed worksas part of the CEMP and must be followed by all contactors. This Plan should specifyalternative recycling and/or disposal methods for any material, including dredge spoil, whichcannot be reused.Any waste that is generated that cannot be reused, such as the geotextile bags (if theycontain unsuitable chemical residue), should be transported off site as soon as practicable toa suitable waste management or recycling facility. This will also aid in maintaining visualamenity (Section 5.9).To apply the treated dredge spoil to land, a Resource Recovery Exemption (LandApplication) must be submitted to and approved by DECCW. An application for thisExemption is being prepared in a parallel process. To be suitable for reuse the treated2 July 2010 Cardno (NSW/ACT) Pty Ltd 113H:\Doc\2010\Reports.2010\Rep2580v4.doc