Manly Lagoon Dredging Project - Manly Council - NSW Government

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Manly Lagoon Dredging Project – Review of Environmental FactorsPrepared for Manly and Warringah Councils6.2 Environmental Management PlansThe following plans would need to be devised and implemented by the contractor during theproposed works as part of the Construction Environmental Management Plan (CEMP):Acid Sulfate Soils Management Plan (ASSMP; Appendix E);Community Consultation Plan;Construction Traffic Management Plan;Dust Management Plan;Erosion and Sediment Control Plan (ESCP);Flora and Fauna Management Plan;Hazards Management Plan;Incident Management Plan (in particular focusing on foreseeable events which maynecessitate suspending or stopping dredging);Noise and Vibration Management Plan;Odour Management Plan;Utilities Management Plan;Waste Management Plan; andWater Management Plan.The CEMP and all management plans must be approved by Manly and Warringah Councilsprior to the commencement of any dredging activity.The above management plans and the overall CEMP should be prepared by the contractorto the standard prescribed in the RTA Guide NG36, which details standards for constructionenvironmental protection and management in contracts (available athttp://www.rta.nsw.gov.au/cgi-bin/doingbusinesswithus/specifications/index.cgi?ng36_e3_r1.pdf). It should be noted that the RTA Guide NG36 is for road related projects; however thedredging contractor can still use the information as a guide to the standard that is required.6.3 Contractor ControlIf correctly implemented the mitigation measures outlined in this document and summarisedin Section 6.1 will prevent the occurrence of any significant or harmful environmentalimpacts during the proposed dredging of Manly Lagoon (based on the information availablein the preparation of this document).A specialist dredging contractor will be contracted by Manly Council to undertake the workson behalf of the proponents. It is recognised that Manly Council have a duty to ensure thatthe selected contractor complies in full with all the requirements of this REF and associateddocumentation.Effective control of the contractor will be achieved through a combination of the followingactions:Contractual requirements, which will include meeting in full the requirements of theREF, ASSMP, all relevant legislation and other applicable requirements;2 July 2010 Cardno (NSW/ACT) Pty Ltd 122H:\Doc\2010\Reports.2010\Rep2580v4.doc
Manly Lagoon Dredging Project – Review of Environmental FactorsPrepared for Manly and Warringah CouncilsRegular dialogue between the contractor and Manly Council throughout the tender,selection and execution stages of the contract;Assignment of a member of Council staff to the role of site superintendent. The sitesuperintendent is to be present on site at all times during dredging, and will have theauthority to stop or suspend dredging at any time. Such a decision may be taken inresponse to a pre-determined stop work trigger as defined in the IncidentManagement Plan, at his discretion, or on the advice of any independent advisor;Pre-determined stop work triggers include encountering unexpected contamination(Section 5.10), evidence of elevated nutrient levels in the lagoon water (Section5.3), the presence of overburden water with a chemical composition which preventsits discharge, the discovery of heritage items (Section 5.5) or the presence ofresidual acid sulfate risk in the treated dredged material (Appendix E). A pre-agreedstand by rate will be agreed with the contractor in the event that these conditions areencountered. These stop work triggers will be defined further in the IncidentManagement Plan;Independent on site testing to verify key chemical parameters (for example residualacid sulfate soil risk, water quality parameters determining suitability of overburdenwater for return to the Lagoon);Periodic site audit and inspection with the objective of verifying that the contractor isoperating in accordance with all specified requirements. Where this is found not to bethe case, immediately identifying and implementing required corrective action; andStrong liaison between the contractor, DECCW, Manly and Warringah Councils.6.4 Licensing and ApprovalsNo permits are required from I&I NSW (Fisheries), such as Section 199, 200 and 219Permits under the Fisheries Management Act 1994. However LPMA is required to consultwith I&I NSW Fisheries and obtain the concurrence of the department, as indicated inconsultation with I&I NSW Fisheries (Section 3.2).Once concurrence has been obtained, and determination is provided under Part 5 of theEnvironmental Planning and Assessment Act, 1979 granting approval for the project (by thejoint determining authorities, Manly Council, Warringah Council, and LPMA (in accordancewith Licence No LI 361677), no additional licences or approvals are required in order for thedredging and dewatering works to commence.However, it should be noted that a Resource Recovery Exemption (Land Application) will berequired from DECCW to allow potential beneficial reuse of the treated dredge spoil,providing the material is determined to be of a suitable physical and chemical compositionfor reuse.2 July 2010 Cardno (NSW/ACT) Pty Ltd 123H:\Doc\2010\Reports.2010\Rep2580v4.doc
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Manly Lagoon Dredging Project - Manly Council - NSW Government

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