Manly Lagoon Dredging Project - Manly Council - NSW Government

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