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ENVIRONMENTAL MANAGEMENT PLAN (Dredging) PORT OF COOKTOWN Version 1.7

A COPY OF THIS ENVIRONMENTAL MANAGEMENT PLAN SHALL BE KEPT ON SITE AND BE AVAILABLE TO ALL STAFF ASSOCIATED WITH THIS PROJECT.

Contents

1 Background and Purpose ....................................................................... 8

1.1 Background................................................................................................ 8

1.2 Dredging Need ......................................................................................... 10

1.3 Purpose ................................................................................................... 11

1.4 Environmental Assessment Process ....................................................... 11

1.5 Management Plan Framework ................................................................. 13

1.6 Legislative Context .................................................................................. 14

1.7 Environmental Features ........................................................................... 17 1.7.1 Regional Setting ................................................................................................ 17 1.7.2 Aquatic Habitats adjacent to the Port of Cooktown ............................................ 17 1.7.3 Mobile Marine Fauna ......................................................................................... 19

1.8 Description of Works ................................................................................ 20

1.9 Potential Environmental Impacts ............................................................. 23

1.10 Community Consultation .......................................................................... 23

2 EMP management strategies ................................................................ 25

2.1 Roles and Responsibilities. ...................................................................... 25

2.2 Sediment Characteristics ......................................................................... 26

2.3 Acid Sulphate Soils (AASS and PASS) ................................................... 27

2.4 Marine Flora and Fauna .......................................................................... 29

2.5 Water Quality ........................................................................................... 37

2.6 Dredging in the Harbour .......................................................................... 38

2.7 Offshore Dredge Material Placement Site................................................ 38

2.8 Waste Management ................................................................................. 40

2.9 Spill Response and Emergency Procedures............................................ 41

2.10 Noise and Air Quality ............................................................................... 43

2.11 Environmental Management Plan Procedures......................................... 45 2.11.1 RESPONSIBILITY AND IMPLEMENTATION .................................................... 45

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2.11.2 COMMUNICATION AND REPORTING ............................................................. 45 2.11.3 DOCUMENTATION AND RECORD KEEPING ................................................. 46 2.11.4 ENVIRONMENTAL AWARENESS TRAINING .................................................. 46 2.11.5 COMPLAINT HANDLING PROCEDURES ........................................................ 46 2.11.6 INCIDENT AND NON-CONFORMANCE REPORTING ..................................... 47

3 Environmental monitoring program ..................................................... 48

3.1 Monitoring Program ................................................................................. 48

3.2 Water Quality Monitoring ......................................................................... 54

3.3 Benthic Monitoring ................................................................................... 63

3.4 Hydrographic Survey Monitoring .............................................................. 64

4 References ............................................................................................. 65

Appendix A Port of Cooktown dredging area .................................................. 67

Appendix B Offshore Placement area .............................................................. 68

Appendix C Land-Based Reclamation Placement area................................... 69

Appendix D Historical Sediment sampling data .............................................. 70

Appendix E Campaign specific EMP Attachments .......................................... 71

Appendix F Copy of legislative approvals ....................................................... 85

Appendix G Post dredge reporting requirements .......................................... 86

Appendix H Acid Sulphate Soil Management Plan .......................................... 87

Appendix I Pre-dredge Benthic Monitoring Report 2013 ............................... 88


PREFACE

This Environmental Management Plan (EMP) details all elements of the Environmental Management Strategy to achieve best-practice environmental management for the maintenance dredging of the Port of Cooktown. Dredging works are currently required at Cooktown to provide safe navigational access and a short term permit has been granted for these works by the Great Barrier Reef Marine Authority and this one off project is to be managed by the contents of this EMP. While TMR has undertaken a long-term dredging strategy for Cooktown in 2010 it is considered that the outcomes of the Great Barrier Reef Marine Park Strategic review will be required before a long term strategy can be effectively implemented.

TMR has undertaken an assessment of dredge material management options given the proposed dredging need. This has resulted in a recommendation of continued use of the approved offshore placement area unless supplementary options are available. In discussions with Cook Shire Council (CSC) their existing approved reclamation area may be completed and hence may be utilised as a supplementary option for dredge material placement. For this reason this draft EMP covers off on the two potential placement alternatives for this one off maintenance dredging project, given the reclamation site cannot accommodate all dredge material.

The EMP is a living document that will be reviewed and updated if necessary during the works period if considered necessary to achieve its objective of meeting best-practice environmental management in completing maintenance of Cooktown Harbour.


1 Background and Purpose

1.1 Background The Port of Cooktown is located at Cooktown on the Endeavour River in Far North Queensland. The Harbour is adjacent to the Cairns/Cooktown Management Area of the Great Barrier Reef Marine Park. Figure 1 shows the location of the harbour, the offshore disposal site and reclamation area that may be utilised under the proposed management strategy and this EMP. TMR on behalf of the State of Queensland, is responsible for maintenance dredging of the entrance channel and swing basin at the Port.

The Department of Transport and Main Roads (TMR) completed a long term dredging strategy: Port of Cooktown in 2010 (BMT WBM (2010). This investigation assessed the dredging need and the potential management options for maintenance dredge material from the Port of Cooktown over a 20 year planning period and set in place a strategy. Despite consultation being undertaken with all approval agencies during the development of this long term strategy, until the completion of the Great Barrier Reef Marine Park Strategic Review, long term approvals appear unlikely to be granted. However TMR has an imminent need for maintenance works to occur at the Port of Cooktown. For this reason a short term strategy has been developed and will be implemented through this Environmental Management Plan.

TMR holds the following permits and approvals:

Environmental Authority Permit No. EPPR01467413 (ERA16);

Allocation of Quarry Material permit number: ENAQ05073313;

GBRMPA Permit No: G14/36368.1;

Sea dumping Act approval No.: SD 14 / 02;

Tidal Works approval Plan No. C0-1-13-1 for dredging and offshore spoil placement area;

Tidal Works approval section 86 plan J902-040 for dredge channels;

Tidal Works Approval for reclamation site No. IPDC00316405D11; and change approval SPD-0414-006809

Marine Plant Permit for Stage 2 of the Webber Esplanade Development No. 2006CA0453.

This EMP and the permit conditions indicated in Appendix F make up the environmental management framework to guide TMR and its contractors in the best practice dredging of the Port of Cooktown Navigational Channels.

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1.2 Dredging Need The Port of Cooktown generally requires infrequent maintenance dredging. Maintenance dredging is typically instigated by cyclones travelling within 50km of the Port which generate flooding and significant waves and currents which cause sedimentation of the navigational channels. Typical seasonal events have not been shown to cause high sedimentation rates. Maintenance dredging was last undertaken at the Port of Cooktown in 1999. However, the current condition of the channel is significantly shallower than design depths and is presenting a significant navigational hazard that requires instigation of a maintenance dredging campaign. BMT WBM (2010) indicated that from cyclone statistics dredging is likely to be required about every 5 years to maintain reasonable operating depths, however a cyclone could occur close to the Port two weeks after the present maintenance dredging project is complete or may not occur for ten years. For this reason the dredging strategy needs to allow for potential dredging primarily associated with episodic events.

Table 2-1 Historical dredged material volumes

Year Total (m3) Comments

1997 108,000 original harbour dredging

1999 26,000 harbour dredged again due to cyclone "Justine"

Dredging Strategy for the next 6 years

Current surveys as of April 2014 (post Cyclone Ita) indicate dredging of about 50,000cu.m is required to achieve maximum dredge depths, but providing an allowance for infill volume before dredging commences, approval for 60,000cu.m is required for the 2014 dredging project.

In accordance with TMR’s long term Dredge Strategy, continued offshore placement of the primarily sandy dredge material is considered the best management option given this material plays an important role in the geomorphological processes of this section of the coast. However through Cook Shire Council, TMR have identified a potential once off supplementary option of placement of dredged material to fill an existing approved reclamation site adjacent to the Port which could provide community benefit. For this reason TMR has gained approvals for the dredging works for placement to both the approved offshore site and to Cook Shire Council’s reclamation area.


1.3 Purpose TMR has undertaken an assessment of dredge material management options given the proposed dredging need over a 20 year planning period. This assessment has resulted in a recommendation of continued use of the existing offshore disposal site, however supplementary options were identified which are proposed to be utilised when available (TMR, 2013). This EMP details all elements of the Environmental Management Strategy to achieve best-practice environmental management for the maintenance of the Port of Cooktown.

Proper implementation of this EMP will minimise the risk of impact to the environment surrounding the dredging and disposal sites. Data from environmental monitoring will support continuous improvement in environmental performance through refinement of the EMP and will provide further information to feed into the long term strategy for the ongoing maintenance of the Port of Cooktown. It is hoped that following the completion of the Great Barrier Reef Marine Park Strategic Review some clear direction is provided on which to base a long term strategy and associated long term approvals to facilitate greater maintenance certainty for the Port.

1.4 Environmental Assessment Process The Port of Cooktown Maintenance Dredging project has been assessed in accordance with the processes outlined in TMR’s Environmental Management System within the Infrastructure Projects (Marine) Area. Figure 1.2 demonstrates the environmental processes through which the project was assessed.

The environmental processes completed for the project included:

A long term strategy document providing the overall guiding principles for maintenance dredging at Cooktown completed during the projects concept phase;

An Environmental Options Report completed during the project’s development phase, identified the project scope and risks;

The outcomes from these assessments, has been used to develop:

o detailed design scope of the project

o environmental permit applications; and

o this EMP.


Figure 1.2 Environmental processes relevant to TMR Marine Projects

Environment and Heritage Processes

Election Committment

Demand Forecasting

Study

Form 1Proposal

Develop Program

Concept PlanDevelopment

Geotech

Survey

Design

PM to complete Environment & Heritage

Service Request

Environmental Scoping Report

Final Concept Plan

Detailed Design

Tender Preparation

Tender Process

ContractorAwarded

Works Commence

Environmental Assessment Report

Environmental Assessment

Develop Permit Applications

Obtain Permit Approvals(may take 3-6 months)

Develop Input to Contract Documentation

Review & Approve Contractors

EMP(C)

Site Inspections & Audits

Practical Completion &

Commissioning

Post Construction Auditing & Approval

Archiving

Feasibility Phase

Concept Phase(may be very short (1-2 wks)

Development Phase

Implementation Phase

Finalisation Phase

Prepare EMP(Planning)

MediumRisk

HighRisk

Review of Environmental Factors


1.5 Management Plan Framework The National Assessment Guidelines for Dredging (DEWHA 2009) details what EMP’s should include and this has been used as the basis for this document:

Overall management framework – describe how the EMP integrates with the overall management framework;

context – put the proposal in the context of the local environment, including history of dredging and dredge material disposal at the site;

description of the project – provide information on dredging and disposal for the term of the plan or permit, including the location, staging, and timing of activities;

information on approvals – provide details of any approvals, relevant conditions and any other statutory requirements;

description of the existing environment – characterise the dredging and disposal sites and adjacent areas, including its water column, sediments, biota, resources and other uses (existing and potential) of the area;

description of potential impacts – address both potential short-term and long-term impacts and any uncertainties regarding the predicted impacts;

management strategies and actions – describe strategies and actions to mitigate impacts – including specific and auditable measures; performance indicators; monitoring requirements; corrective actions; and responsibilities and timing for management and monitoring activities;

contingency arrangements – identify corrective actions and contingency plans should undesirable or unforseen impacts occur;

continuous improvement – identify opportunities for continuous improvement to prevent, minimise or mitigate environmental impacts in the longer term;

auditing requirements and reporting – outline reporting and documentation standards, timing and responsibility of any auditing or reporting; and

review of management plan – make provisions for a review of the management plan, including consultation with the TACC, to ensure it remains current.

This EMP has been developed as a stand alone planning and operational document that ties together all aspects of maintenance dredging at the Port of Cooktown.


1.6 Legislative Context The Port of Cooktown dredging and placement of the resultant dredged material at sea within the Great Barrier Reef Marine Park or to either of the supplementary land based options identified requires approvals under both Commonwealth and State legislation. These are described below and copies of the approvals can be found in Appendix F.

Commonwealth Legislation

Environment Protection (Sea Dumping) Act 1981 The Environment Protection (Sea Dumping) Act 1981 (Sea Dumping Act) was enacted to fulfil Australia’s international responsibilities under the London Convention of 1972 and has been amended to implement the 1996 Protocol to the London Convention (which Australia ratified in 2001).

The Sea Dumping Act regulates the deliberate loading and dumping of wastes and other matter at sea. It applies to all vessels, aircraft or platforms in Australian waters and to all Australian vessels or aircraft in any part of the sea. The Act states that only uncontaminated dredged material may be disposed at sea. The then Dept of Environment, Water, Heritage and the Arts (DEWHA) (now Department of the Environment, DoE) issued guidelines for sampling and testing sediment, which must be followed in order for a sea dumping permit to be issued.

The Sea Dumping Act applies in respect of all Australian waters (other than waters within the limits of a State or the Northern Territory inland waters), from the low water mark out to the limits of the Exclusive Economic Zone. The Act is currently administered by DoE or the GBRMPA if dumping is to take place within the GBRMP.

In assessing any proposal under the Sea dumping Act the proposal is also assessed under the Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act).

TMR’s continued use of the existing ocean disposal site as part of the strategy necessitates the need for a sea dumping permit.

Great Barrier Reef Marine Park Act 1975

The Great Barrier Reef Marine Park Act 1975 (GBRMP Act) establishes a framework for the establishment, control, management and development of the GBRMP. The Act is administered by the Great Barrier Reef Marine Park Authority (GBRMPA).

Regulation 117 of the Great Barrier Reef Marine Park Regulations 1983 states that the GBRMPA must assess any project that has the potential to impact on the marine park. In addition to seeking an approval, the proponent will provide the information outlined in Regulation 74(5) of the Act to GBRMPA to enable it to make an assessment.

State marine park legislation (Queensland Marine Parks Act 2004) is also combined into the Commonwealth permit where boundaries overlap.

TMR’s continued use of the existing offshore placement site and any dredging within the GBRMP necessitates the need for a permit under the GBRMP Act. Part of the entrance channel is within the GBRMP and for this reason any maintenance dredging works will require a Permit regardless of the dredge material placement option.


State Legislation

Marine Park Act 2004

State marine park legislation (Queensland Marine Parks Act 2004) is combined into the Commonwealth permit where boundaries overlap.

The Great Barrier Reef Coast Marine Park (GBR Coast MP) is a State marine park that runs the full length of the Great Barrier Reef Marine Park (GBRMP) from just north of Baffle Creek (north of Bundaberg) to Cape York. It provides protection for Queensland tidal lands and tidal waters.

Sustainable Planning Act 2010

The Sustainable Planning Act 2009 (SP Act) establishes the Integrated Development Assessment System (IDAS) which integrates a range of development approvals, including the Coastal Management and Protection Act 1995, Environment Protection Act 1994 and Transport Infrastructure Act 1994.

The SP Act also provides the framework for the regulation of land use and development within local government areas, in this instance Cook Shire Council.

Coastal Protection and Management Act 1995 The Coastal Protection and Management Act 1995 (CP&M Act) provides a framework for the development of regional plans which regulate development in coastal areas. The regulatory mechanisms are administered under the SP Act. An assessment under the CP&M Act is triggered in relation to assessable development within tidal waters. This includes dredging and disposal of dredged material within tidal areas.

An IDAS application for operational works in relation to works within tidal waters and disposal of dredged material in tidal waters.

TMR has existing historical operational works approvals which last in perpetuity for dredging within the Port (Appendix A) and placement of this dredged material within the extents of the existing defined offshore placement area (Appendix B), Cook Shire Council also holds operational works approvals for the reclamation area (Appendix C). Any change to the dredge area, disposal area or footprint of the disposal area would require additional operational works approvals.

Environmental Protection Act 1994 The Environmental Protection Act 1994 (EP Act) provides a framework for Environmentally Relevant Activities including dredging and disposal of dredged material. The regulatory mechanisms are administered under the SP Act. An assessment under the EP Act is triggered in relation to a material change of use (MCU). The Act is triggered for any of the disposal options.

An IDAS application for an MCU which is an ERA16 (extraction) is required for dredging and disposal works.


Fisheries Act 1994

The Fisheries Act 1994 provides a framework for the management and regulation of activities in relation to fisheries, coastal areas that are important as fish habitats and marine plants.

Development approval or notification under self assessable codes may be required in relation to damage or removal of marine plants such as seagrass or marine algae in the approved dredge and placement area.

For this project the navigational channels being dredged and the approved offshore placement area are covered under the self-assessable code. In addition to this Cook Shire Council’s reclamation area has an approval for damage to marine plants as outlined in Appendix F.

Transport Infrastructure Act 1994, Transport Operations (Marine Safety) Act 1994, Transport Operations (Marine Safety) Regulation 2004.

Maritime Safety Queensland (MSQ) is a Concurrence Agency for dredging and disposal works which may impact on maritime navigation. The Regional Harbour Master places conditions on any Development Approval to ensure Marine Safety is achieved

TMR has conditions in its overall development approvals to cover Maritime Safety and is required to notify the RHM prior to the start of any works and seek advice and take direction from the RHM on any element of the project associated with navigational safety.

Aboriginal Cultural Heritage Act 2003

The Aboriginal Cultural Heritage Act 2003 (ACH Act) and the Torres Strait Islander Cultural Heritage Act 2003 came into force on 16 April 2004. Underpinning the Act is a “cultural heritage duty of care”, which requires that a person who carries out an activity must take all reasonable and practicable measures to ensure the activity does not harm Aboriginal cultural heritage.

The Act establishes a framework for the conduct and assessment of cultural heritage impact and processes to be undertaken in preparing Cultural Heritage Management Plans (CHMP) which will be followed by TMR during the course of any dredging campaign.


1.7 Environmental Features

1.7.1 Regional Setting The Port of Cooktown is located in a small embayment of the far northern part of the Great Barrier Reef Lagoon. The seabed in the region is relatively shallow with depths typically less than 6m below LAT in the near vicinity of the harbour graduating to about 10m below LAT approximately 5km offshore. The Endeavour River discharges into this embayment which is a source of sand into the coastal system. The primarily sandy material that infills the navigational channels and necessitates the need for maintenance dredging is a result of mobilisation of sediment in the local coastal system via large wave events, usually associated with cyclone events. Some of this material would be directly from the river and some would have migrated to the area via natural coastal processes. The low content of fines shown from historical sediment sampling indicates that the area is a relatively high energy coastal environment in which fine sediments are transported away leaving a sandy inshore substrate. These sandy materials play an important role in the local coastal geomorphology which is reflected in the policies supporting the Coastal Protection and Management Act 1995.

Baseline water quality data collected indicates high natural variability at the Port of Cooktown. Due to this factor it is important to assess impacts associated with dredging and disposal works in context with the natural water quality conditions. Given the dredged sediment is primarily sand, water quality impacts are expected to be reduced given sandy material settles out of suspension much faster than finer sediment and hence has less potential for impact.

1.7.2 Aquatic Habitats adjacent to the Port of Cooktown Although the majority of the Port itself is excluded from the GBRMP, part of the entrance channel and the proposed offshore placement area is within the GBRMP as are the surrounding waters. A range of marine habitats have been identified in the wider region.

Soft Sediment Environments

Subtidal and intertidal soft sediment habitats represent the largest biotope by area within the river estuary, the entrance and nearshore environments. These areas are inhabited by benthic microalgae and they also contain mangroves, saltmarshes and seagrasses. Historical and recent mapping undertaking by GHD (2006) and FRC (2013) show significant seagrass and macroalgae communities throughout the study area. However no communities were identified within the proposed dredge channel and while some communities were identified within the existing offshore placement area these areas were small in comparison to the overall extent of the placement area.

Marine Vegetation

The primary vegetation communities of relevance to dredging and placement activities include;

Seagrass;


Mangroves and saltmarsh; and

Coastal dune communities.

Seagrasses

Seagrasses at and adjacent to the study area have been extensively surveyed by WBM (1996), FRC (2000), GHD (2006), Cape York Marine Advisory Group (CYMAG, 2004, 2005 and 2007) and FRC (2013). Seagrass meadows showed great variation over time in terms of distribution, extent, species composition and density.

As with other tropical Queensland rivers and nearshore areas, seagrass meadows commonly colonise intertidal or shallow subtidal areas at the river mouth during the dry season, but reduce in growth and/or distribution in the wet season. This seasonality is thought to be a result of cyclonic or floodwater influences (Coles et al., 2007). The wet season is associated with high rainfall, high sediment loads and nutrients to nearshore marine waters which impact on seagrass.

Some meadows appeared to be relatively stable over time. In this regard, a bed of Halodule uninervis on Sachs Spit, and beds around the base of Grassy Hill were recorded in the majority of historical surveys, possibly because these meadows are less exposed to flood water and sediment impacts.

Historically no seagrass meadows were identified in the navigational channel however the recent survey FRC (2013) found 141m2 of low density cover of Halophila ovalis on the northern edge of the channel.

Only 10m2 of moderate density seagrass (Zostera caprcorni and Halodule uninervis) was identified within the north-eastern corner of the Dredge Material Placement Area (DMPA) in 2005 from GHD (2006) however in the recent survey of 2013 (FRC, 2013) almost 30,000m2 of seagrass meadows were identified (Halophila ovalis and Zostera capricorni) including 19,000 m2 of lower density (1-30%) and 11,000 m2 of moderate density. This significant increase may be explained by the lack of a significant wet season in 2012/13. It should be noted that the DMPA has a gross area of 140,000m2 so a significant area of sandy seabed is devoid of seagrass and macro algae.

Overall the 2013 survey showed an increase in the spatial extent of seagrass meadows within the study area, as outlined in FRC (2013).

Seagrass plays an important role in marine ecosystem of the study area, and from historical mapping campaigns its spatial extent and density is variable based on seasonal conditions. Because a small area of seagrass is likely to be disturbed in the dredge area to undertake the 2014 campaign a marine plant disturbance notification will be required under self assessable code MP02. However no disturbance to seagrass is expected at the DMPA.

Mangroves and Saltmarsh

Mangroves and saltmarsh communities dominate the riparian zones upstream of the dredging area in the Endeavour River and form a complex wetland habitat west of the Cooktown township as outlined in BMT WBM (2010).


Hard Substrate Environments

The hard substrate structures are made up of three elements in the study area. (1) Artificial structures such as rock walls, wharfs etc, (2) Subtidal reefs and (3) intertidal reefs/rocky shores.

Artificial structures exist along the southern side of the Endeavour River adjacent to the Cooktown township. These structures include rock and concrete retaining structures and wharfs to facilitate shipping access. These structures provide a range of complex micro-habitats for marine flora and fauna communities.

Detailed surveys of sub-tidal reef communities were undertaken in the area north of Grassy Hill in 1995 (WBM, 1996). These nearshore rocky reefs support extensive areas of brown algae. These areas were separated by areas of bare sand and some patches of seagrass. In water depths 1 to 3m. WBM (1996) recorded a variety of hard corals in deeper waters between 5 and 10m water depth on a reef approximately 500m from the shipping channel. All coral species encountered were encrusting, plating or massive forms. Branching forms of coral were not identified. Inshore areas 1-2m water depth supported extensive Sargassum beds on rock substrates. It was noted during these surveys high turbidity results occurred due to wave action.

Intertidal reefs were not surveyed however were expected to exist around the rocky headland of Grassy Hill as a continuation of the sub-tidal reef community.

From the long term strategy (BMT WBM, 2010), the primary sensitive habitats identified which have the potential for impact from the dredging and placement works are seagrass meadows. These are located in the vicinity of the dredging and offshore placement areas and the rocky reefs around Grassy Head.

Baseline monitoring results discussed in the long term strategy indicate that the aquatic habitats in the vicinity of the Port of Cooktown are accustomed to naturally high and variable turbidity levels.

1.7.3 Mobile Marine Fauna

In addition to these specific habitats there is potential for the dredging and disposal works to conflict with large marine fauna including dugongs, whales and turtles. Visual monitoring and operating procedures have been developed to mitigate potential impacts.


1.8 Description of Works For the 2014 campaign it is estimated that TMR may need to dredge up to 60,000 cu.m. The final dredge volume for this project will be assessed on the difference between pre and post hydrographic surveys. A map of the area to be dredged is provided in Appendix A.

TMR’s Long Term Dredging Strategy BMT WBM (2010) identified the historically used offshore placement site approximately 1.5km offshore of the harbour as the most appropriate long term management option. A map of the offshore spoil ground is provided in Appendix B.

The long term strategy also identified a potential supplementary option to place some material in Cook Shire Council’s reclamation area adjacent to the Port. Current estimates indicate that the capacity of the reclamation is likely to be up to 30,000cu.m. For this reason placement to the reclamation structure can only manage a portion of the dredge material so a significant amount of the material will have to be managed via placement to the existing offshore placement site as recommended in the Long Term Strategy BMT WBM (2010).

Current works schedules indicate the dredging program will take 8 to 10 weeks and is of primarily sandy dredge material.

Proposed Dredging Methods

The proposed works will be undertaken with the following method.

A cutter-suction dredge (CSD) with a pipeline to the disposal site (either offshore OR land based), either floating or across the sea floor.

Description of Cutter Suction Dredge Plant A cutter suction dredge has a cutter head which turns slowly to break up the sediment into suspension and sucked up through a pipeline at the cutter. The vessel is a large pontoon type structure with a large suction pump attached to a pipeline. The sediment is suspended in the water at the cutter and then sucked up into the pipeline and transported directly to the disposal site through a continuous pipeline to where it is released. This dredging method can transport material to any site where a pipe can be installed to. If it is used for offshore placement it is typically placed close to the seafloor, but is limited in the distance pumping can occur offshore. See figure 2 for an example of a cutter suction dredge.

Figure 2 - Birdon’s Cutter Suction Dredge Darwin, working at Queenscliff, Victoria.


Impacts

Dredge Area

The cutter suction dredge is highly manoeuvrable because of its size and configuration. Because the material is transported directly in a pipe this method creates the least amount of turbidity at the dredge site.

Offshore Disposal Site

The flexible pipeline would be secured to a floating pontoon which is anchored to the seafloor at the disposal site and moved periodically to spread the material to gain the required finish levels. Because the dredged material is placed close to the seabed it results in less mixing through the water column than disposal via bottom dumping methods. However material placement via this method is continuous when the dredge is operating so any turbidity created develops over a day of dredging works.

Reclamation Disposal Site

The pipeline will extent from the dredge into the designated reclamation area and be moved periodically in order to fill the reclamation. The Potential impacts from placement to the reclamation area are listed below;

1. Turbidity outside as a result of dredge material loss which may impact on nearby areas

2. Potential acid runoff as a result of inadequate PASS Management

Dredging Methodology

Any dredge contractor undertaking work within the Port of Cooktown will be fitted with DGPS navigation and positioning system and depth sounding to allow the dredger to accurately dredge within the dredge area and monitor progress. The coordinates of the dredge and deposition areas will be loaded onto the dredger’s DGPS prior to commencement.

Works are weather dependent and may be tidally constrained. It will be the responsibility of the dredge master to determine if prevailing conditions allow safe operation.

The dredger operates at slow speed and undertakes visual monitoring for mobile marine fauna as detailed in Table 2.1. Dredgers are equipped with emergency spill cleanup kits. Detailed procedures as to reporting and steps to control the discharge are included in the Oil Pollution Emergency Plans. See Appendix J.

Disposal Methodology

Offshore Disposal

The pipeline shall be anchored and positioned using DGPS and moved intermittently to spread material across the site.


The dump site may be split into a number of sub-areas to enable the material to be spread evenly over the site. Monitoring of the disposal site will occur over the duration of the works to ensure that unacceptable shallow areas are not created.

Placement to Cook Shire Councils Reclamation Site

The reclamation area adjacent to the harbour will be an enclosed rock wall structure that will be lined with geo-textile fabric and certified by an RPEQ Engineer to ensure it meets the specified design requirements before any placement works occur. TMR’s contractor will install a tail water pipe into the facility to return excess water to the harbour however it is expected that initially the structure is quite permeable and for this reason the tail water will be filtered through the wall. A cutter suction dredge will be utilised to undertake the dredging works and a pipeline will be installed from the dredge into the reclamation area.

Prior to the commencement of placement the structure will be inspected to ensure the geo-fabric material is appropriately placed to contain the dredge material. The contractor will pump the fluidised sandy dredge material into the reclamation area up against the bund wall along its entire length and use an excavator to build a layer of sandy material along the inside of the wall.

This process provides the following environmental management benefits;

1. Identify if there are any unidentified holes or tears in the geotextile so these can be repaired prior to the bulk of works commencing.

2. This sandy material will provide an additional filter layer to the structure that will clog the geotextile and retain the dredge material placed later in the campaign.

It should be noted that as with any reclamation works the initial placement component is likely to result in higher turbidity outside the structure until the geotextile fibres are adequately clogged. It is for this reason allowance for the first five days of placement has been made in the monitoring strategy and intensive monitoring will occur for the first two weeks of placement to confirm the extent of impact and ensure sensitive receptors are not impacted.

Once this initial layering is complete the reclamation will be filled progressively and temporary internal bunds will be constructed to improve settling times and maintain tail water limits outside the structure.

Potential Acid Sulphate Soils will be treated within the facility in accordance with the ASSMP (Appendix H). The reclamation area will also be filled in accordance with any loading requirements specified by the reclamation facility design engineer. At the conclusion of the placement works the reclamation will be handed back to Council.


1.9 Potential Environmental Impacts The primary risks associated with dredging of Port of Cooktown and placement to the potential placement options are as follows:

1) Seabed disturbance including:

o physical removal of the substrate and its associated flora and fauna from the dredge site;

o smothering of the seabed at the offshore dredge spoil placement site; and

o smothering of the seabed within the approved reclamation area.

(Note: These impacts are unavoidable in order to carry out the approved works so are accepted impacts)

2) The suspension of fine sediment in the water column which can form plumes ‘down current’ of the Port and the spoil placement areas, and the resulting blanketing and water quality impacts from the settling of sediment in the plume areas.

3) The re-suspension of fine sediment from the offshore disposal site and the potential for blanketing and water quality impacts on sensitive areas.

4) The possibility of contaminants in some of the sediment, including PASS, to be released at or from the disposal site.

While historical sediment sampling campaigns in 2006 and 2013 show that material dredged from Port of Cooktown is suitable for unconfined ocean disposal. There remains a risk that future material may not meet these requirements.

5) Translocation of marine pests on dredging plant / machinery.

6) Marine incidents involving vessels, oil/fuel or dredge sediment spills, collisions with large marine fauna, or spillage of material in transit to the disposal site.

1.10 Community Consultation Significant consultation of all associated stakeholders was undertaken during the development of the long term strategy in 2010.

In addition to this a presentation of the proposal was provided to GBRMPA’s Local Marine Advisory Committee (LMAC) (grouping of community stakeholders). Feedback from the group was received and included in the development of the EMP. The approval process required consultation and assessment of the project by DEHP, DAFF, MSQ, Cook Shire Council and GBRMPA. For this reason all stakeholders have been consulted for this project.


This EMP will be placed on TMR’s website when finalised for public information and contact details provided if the public wishes to provide feedback on the document. If this feedback entails specific action because of issues with the current project, this feedback will be treated as a complaint under this EMP and actioned appropriately. Otherwise this feedback will be recorded and discussed with the Technical Advisory and Consultative Committee (TACC).

The following stakeholders will to be represented on a TACC to guide future development of the Environmental Management Strategy at the site.

Relevant stakeholders to include:

Great Barrier Reef Marine Park Authority;

Department of Environment and Heritage Protection;

Maritime Safety, Transport and Main Roads;

Department of Agriculture, Fisheries and Forestry ;

Cook Shire Council; and

A minimum of 2 community representatives from GBRMPA’s Local Marine Advisory Committee (LMAC).


2 EMP management strategies This component of the EMP outlines mitigation strategies for the protection of specific environmental values that may be affected by dredging and disposal of dredged sediment.

The extent to which the environmental risks identified in the previous section lead to tangible or observable environmental impacts will depend on the duration of impacting process, the extent of the area effected, the intensity of impacting process, and the resilience of the natural environment to the impacting process.

Environmental Risks, Controls and Contingency Measures are summarised in Appendix J, Table 1.

Individual management strategies (controls and contingency measures) have been prepared for:

Sediment characteristics;

marine flora and fauna;

water quality;

waste management;

spill response and emergency procedures; and

air and noise.

2.1 Roles and Responsibilities. The following parties have responsibilities under this EMP:

TMR Principal and Superintendent

Contractor Dredging Contractor

TMR consultant Consultant employed by TMR to carry out environmental monitoring

ESS Environmental Site Supervisor (GBRMPA rep)

Management strategies may be revised and updated based on experience. It is intended that specific work instructions be prepared for staff and contractors as the details of dredging methods and conditions of approval for each project are finalised. The following management measures will be implemented to minimise these impacts.


2.2 Sediment Characteristics Addresses Primary Risk 4:

Objective

To ensure material proposed to be dredged and placed at the offshore disposal site has similar physical and chemical properties to the surrounding sediments. Ensure sediment proposed to be placed above HAT is appropriately treated for ASS and appropriately managed if other contaminants were identified.

Environmental Risk

The Port of Cooktown is isolated and on a largely undeveloped catchment, therefore the risk of contamination of sediment is small. However a small risk still exists that minor vessel maintenance or pollution from visiting vessels could result in contamination of harbour sediments.

Table 2.1 Sediment Characteristics Assessment Strategies

Action Responsibility

TMR undertakes annual seabed monitoring surveys to assess the volume of siltation in the navigational channels in order to plan for dredging campaigns. When siltation rates reach a level that require dredging a consultant will be commissioned to develop a Sediment Sampling Analysis Plan (SAP) for the extent of the proposed dredging area in accordance with NAGD (2009). To investigate sediment characteristics, contaminants and ASS

TMR

TMR will forward a copy of the SAP to GBRMPA and DEHP for review

TMR

Subject to concurrence from GBRMPA and DEHP on the content of the SAP sediment sampling will be undertaken and a report drafted on sediment characteristics. This report will assess the sediment in accordance with the NAGD (2009) and relevant ASS guidelines.

TMR’s consultant

Performance indicators

Sediments must be suitable for ocean disposal in accordance with NAGD (DEWHA, 2009) if they are going to sea (sampling is valid for up to 5 years).

Mitigating strategies will be developed to manage risks associated with the disposal option chosen.


Monitoring and reporting

A final sediment sampling report shall be provided to GBRMPA and DEHP prior to the commencement of dredging works.

Corrective action/contingency plan

In situations where the performance criteria cannot be met alternative disposal options must be utilised.

2.3 Acid Sulphate Soils (AASS and PASS)

Addresses Primary Risk 4

As the site is on tidal lands which are below 5m AHD there is a risk that actual (AASS) and/or potential (PASS) acid sulfate soils may be present. Sediment sampling by FRC (2013) undertaken in accordance with section 2.1 indicated PASS in the dredged spoil. In order to delineate the sites of potentially high PASS, the contractor will use Table 2.1 of the Sediment Sampling report (FRC, 2013) and the respective depths of the samples which are detailed in Table 3.2 of the draft Acid Sulphate Soils Management Plan (FRC, 2013a) to determine which material is suitable for the reclamation area. The depths in which there is a higher risk of PASS will not be placed in the reclamation area, but rather in the ocean disposal site. In addition, the contractor will complete ASS testing after every 250 Cu. M of spoil is placed at the reclamation site. If required, further treatment (i.e. liming) will be completed as per the Sediment Sampling and Analysis Plan (FRC, 2013).

Given the presence of PASS an Acid Sulfate Soil Management Plan must be developed to manage and mitigate this risk in the event dredge material is placed above Mean Sea Level.

However there is no ASS/PASS risk if dredge material is to remain below Mean Sea Level. (i.e. offshore placement).

However for placement to Council’s reclamation area all works are to be undertaken in accordance with the ASS Management Plan detailed in Appendix H.

Table 2.8 – Acid Sulfate Soil Management Plan

Issues Release of low pH (acidic) tail water

Objectives To prevent impacts on the receiving environment as a result of releasing low pH material

Control Measures

Place all material into settling ponds at the disposal area and treat in accordance with ASS management plan (appendix H).

Environmental Monitoring

Monitor settling ponds and tail water release for pH Total Titratable Acidity, dissolve iron and total iron

Performance Indicators

No acid runoff impacts to the receiving environment – pH measured at WQ7 adjacent to tailwater outlet daily and pH below 7 to trigger management actions.


Included in monitoring specification.

Results reported to Superintendent for referral to DEHP

Response In accordance with ASS Management Plan (Appendix H)


2.4 Marine Flora and Fauna Addresses Primary Risks 2, 3 and 5:

Objectives

To minimise direct and indirect disturbance to marine flora and fauna other than within the immediate works areas.

To ensure turbid plumes from the works and re-suspension of material from the disposal site do not significantly impact the long term ecological values and integrity of the adjacent seagrass and coral assemblages.

Environmental Risk

The primarily sandy material dredged from Port of Cooktown is sourced from the adjacent coastal system and hence placement of this material back into the littoral system is not increasing the sediment within the system. For this reason the environmental risks of these works are broken down into the following.

1) Direct impacts on marine fauna from the dredging and disposal works;

2) Direct impacts at the dredge and disposal areas due to substrate removal and smothering;

3) The potential for short-term impacts of plume transport from dredging and disposal activities on sensitive receptors;

4) The potential for medium-term impacts associated with the re-distribution of dredged sediment from the disposal site on sensitive areas (offshore site only); and

5) The potential for acid runoff from land based options and its associated impacts on water quality.

Hydrodynamic modelling from BMT WBM (2010) together with sediment properties of the dredge material gathered by FRC (2013) indicate that plumes created by dredging and offshore disposal should be contained within 300m of the works area for high flow events. However in the majority of flow conditions, plumes will be very localised. These results indicate the plumes created by the offshore disposal of dredge material will be contained within the extent of the disposal area and hence adjacent sensitive areas should not be impacted. However a monitoring program has been developed to assess the extent of dredge related impacts and trigger compliance actions.

TMR has utilised recent benthic monitoring data FRC (2013) to refine the placement area within the larger approved offshore placement site to avoid direct impacts to seagrass communities as outlined in Figure 2.4.


Figure 2.4 Area enclosed by the blue line outlines the extent of the placement area for the 2014 project. The red area outlines the full extent of historically utilised placement area.

With respect to placement to the reclamation area, release water quality will be controlled by increasing the water retention time in the facility, via one or several methods such as; slowing the dredging rate, creating internal bunds, varying the outlet level depending on the physical sediment characteristics and changing the inlet location. Monitoring of the release water quality in the monitoring program will ensure that release limits are met.

As indicated in the description of works section, when placement commences there is the potential for increased turbidity outside the structure as the geo-fabric material is clogged however this is expected to be temporary and maintained locally. However to ensure this period is assessed intensive monitoring is proposed to identify any unexpected impacts and instigate management actions. With the intention to ensure any turbidity increase does not impact on identified sensitive receptors.

With respect to redistribution of dredge material from the Dredge Material Placement Area, following modelling outcomes in BMT WBM (2010) and a review of historical surveys of the disposal site from the placement projects of 1997 and 1999 the dredge material is expected to largely move back and forth and flattened out over the disposal area. Pre and post dredge hydrographic and benthic surveys will be undertaken and annual hydrographic surveys will be captured to assess this, however the placement of the relatively small volume proposed for this project has a low risk of impacting areas outside the extent of the DMPA.


Mobile marine fauna such as fish, dugong, turtles and cetaceans can generally avoid areas that are temporarily impacted by turbid plumes generated by dredging and spoil disposal activities. The dredging campaign will be relatively short, therefore the impacts of any localised reduction in water quality will be temporary. There is little likelihood for substantial numbers of turtles, crocodiles, dolphins, whales and dugong to be present within the vicinity of dredging and ocean disposal activities. However, should these fauna be present during dredging, there is the potential for injuries to occur through individuals being disturbed, struck or captured by the dredge head (particularly turtles). In order to minimise the potential for fauna capture visual monitoring will be undertaken by the contractor for the duration of the campaign.

Operational risks of the dredging program to marine mammals and reptiles and their associated mitigation measures are summarised below. More detailed strategies are given to protect dolphin, dugong and turtles, as it is considered that whilst the risk is low, these are the most likely to be encountered. The risk management strategy is underpinned by a constant visual monitoring of the water area surrounding the dredge for the presence of marine mammals and turtles. Any damaged marine mammals or turtles will be reported immediately to the ESS.


Table 2.2 Marine Fauna and Flora Management Strategies

Taxa and Operation Risk Likelihood

of Risk Justification Risk Mitigation Strategy Responsibility

General Maintain the extent of the turbidity plumes close to the dredging and disposal areas to minimise impacts on marine fauna habitat.

DTMR & Contractor

Visually observe for large marine fauna such as dugong, whales, crocodiles or turtles in the works areas. Follow procedures below, and as directed by ESS.

Contractor

In the event that a native animal is injured, adopt procedures outlined in Section 2.8.6.

Contractor

If the death of a listed species is suspected to have occurred in or near the works area, adopt procedures outlined in Section 2.8.6.

Contractor

Inspect dredge hull for marine pests prior to travelling to site if vessels outside Australia are to be used.

Dolphins Contractor

Dredging Interaction between dolphin and dredge head

Very Low Dolphins likely to temporarily move away from dredge area at commencement of works

Stop dredging if dolphin are sighted within 50 m of dredge head. Dolphins can be driven away from area by mechanical noise (e.g. banging iron pipe underwater).

Contractor


Taxa and Operation Risk Likelihood

of Risk Justification Risk Mitigation Strategy Responsibility

Dredging Noise associated impacts Very Low

Noise associated with dredging activities is typically constant rather than intermittent. Noise generated by dredging is likely to be at low frequency due to the nature of the seabed and dredging equipment. Dolphins are relatively robust to low frequency noise compared to high frequency noise.

None Contractor

Dredge under steam to / from spoil ground

Physical injury of dolphins due to vessel strike

Very Low Dolphins are highly mobile and are commonly observed bow riding marine vessels None Contractor


Separation of pod / younger animals Very Low Dolphins are highly mobile and are commonly

observed bow riding marine vessels None Contractor

Dumping of dredge spoil

Physical injury of dolphins during disposal of dredge spoil

Very Low Dolphins are highly mobile and are likely to move away during spoil disposal

Delay spoil disposal if dolphins are in the area. Dolphins can be driven away from area by mechanical noise (e.g. by banging an iron pipe underwater

(MCiwem 2006).

Contractor

Dredging / spoil disposal

Reduction in food availability Very Low

Fish stocks are mobile and although they may move from the immediate works area, are expected to return upon cessation of works.

None Contractor


Changes to water quality Very Low

Turbidity-associated changes to water quality with dredging / disposal activities are likely to have little impact on dolphin populations. Increased turbidity may lead to increased predation on fish by dolphins

None Contractor


Dugong

Dredging Interaction between dugong and dredge head

Very Low

Dugong are unlikely to occur in the proposed dredging area due to sparse seagrass cover in this area

Stop dredging if dugong are sighted with 50 m of the dredge. Deter dugong by mechanical noise (e.g. banging iron pipe underwater).

Contractor

Dredging Noise associated impacts

Very Low

Dugong are less acoustically sensitive than dolphins. Noise associated with dredging activities is typically constant rather than intermittent. Noise generated by dredging is likely to be at low frequency due to the nature of the seabed and dredging equipment.

Visual surveys for dugong prior to commencement of works to ensure no dugong are present. Stop dredging if dugong are sighted with 50 m of the dredge. Mechanical noise (e.g. banging iron pipe underwater) may deter dugong from the area.

Contractor


Physical injury to dugong due to vessel strike

Very Low

Dugong mobile and are likely to move away from vessel

Vessel to slow down if dugong are sighted in transit to / from the spoil disposal site.

Contractor


Separation of mother and calf

Very Low

Few dugong are expected to occur in the area as seagrass cover is sparse across the dredging and disposal sites

Vessel to slow down if dugong are sighted in transit to / from the spoil disposal site.

Contractor


Physical injury due to disposal operations

Very Low

Dugong are unlikely to occur in the proposed disposal area, due to low abundance of seagrass. Dugong mobile and are likely to move away from vessel

None Contractor


Degradation of feeding grounds

Very Low

Seagrass cover is sparse within proposed dredging and spoil disposal area. Halophila ovalis (the dominant species of the study area) is a colonising species, and is expected to quickly re-colonise disturbed areas.

None Contractor


Turtle

Dredging Interaction between turtle and dredge head

Moderate Turtle are unlikely to occur in proposed dredging area due to lack of habitat and food sources in this area.

Stop dredging if turtle are sighted with 50 m of the dredge. Mechanical noise (e.g. banging iron pipe underwater) may deter turtle from the area.

Contractor

Dredging Noise associated impacts Very Low Turtle are not acoustically sensitive. None Contractor


Physical injury to turtles due to vessel strike

Moderate

Turtles are susceptible to boat strike. However the dredge will be moving relatively slowly when compared to other boats in the area.

Vessel to slow down if turtle are sighted in transit to / from the spoil disposal site. Contractor


Physical injury due to disposal operations

Low Turtles are mobile and likely to move away from the area None Contractor


The sediment sampling reports completed by FRC environmental (2013) (Appendix D), indicate that all samples are below screening levels in the National Assessment Guidelines for Dredging (DEWHA 2009). The sediment sampling results were consistent with the previous sediment sampling GHD (2006). The sampling did show Acid Sulphate Soil potential in the sediment and for this reason any land based placement will require appropriate treatment. However overall the environmental risk associated with sediment contamination at the dredging and disposal site is low.


Physical disturbance to the substrate does not extend beyond the footprint of the dredging area shown on permit applications

Physical disturbance (smothering) at the disposal site. Placement will occur to contain all dredge material within the disposal site extents and in addition to this a specific dump area has been allocated for this dredging campaign to minimise smothering of any seagrass within the disposal site area based on seagrass mapping.

Physical disturbance at the reclamation area is in accordance with Environmental Approvals

No marine fauna incidents.

Sightings of rare, endangered and threatened animals likely to be impacted by the works are reported to the Superintendent and the ESS


All sightings of rare, endangered and threatened animals including marine mammals, turtles and crocodiles, which could possibly have been impacted by the works, will be recorded and reported to the Superintendent, who will forward details to the DEHP and the ESS.

Pre and post Hydrographic surveys to be undertaken to confirm dredging area and extent of changes at disposal site and surrounding areas.

A program of Before After Control Impact (BACI) Benthic (primarily seagrass) and Coral monitoring is to be undertaken in accordance with section 3.3 to quantify impacts in the event the water quality program identifies any.

This report shall be provided to GBRMPA or DEHP on request and provided within 60 days following the completion of the monitoring program.


All incidents involving flora or fauna are to be reported to the Superintendent and the ESS.

Dredging outside of approved areas is a breach of approval conditions and shall be reported to the Superintendent and the ESS and remediation works shall be undertaken to the satisfaction of approval agencies.


Disposal of material outside the designated disposal site is a breach of approval conditions and shall be reported to the Superintendent and the ESS and remediation works shall be undertaken to the satisfaction of approval agencies.

2.5 Water Quality

Addresses Primary Risks 2, 3 and 6:

The GBRMP Water Quality Guidelines (2010) indicate the need for the following framework;

1) Identify Environmental Values

2) Set Water Quality Objectives

3) Put in Place Monitoring and Assessment Programs

4) Management Response based on outcomes

TMR’s long term dredge strategy BMT WBM (2010) identified seagrass meadows adjacent to the dredge and placement areas and coral communities offshore of the dredge area. These are the primary sensitive receptors in the vicinity of the dredging and disposal works. For this reason TMR has focused on these elements.

The GBRMP WQ guidelines specify the following measurement parameters; Water Clarity, Suspended Solids, Sedimentation, Contaminants and Light (PAR).

Historical sediment sampling events have indicated no contamination above screening levels specified in the NADG (DEWHA 2009). For this reason the monitoring with respect to contaminants will continue via sediment sampling prior to specific dredge events. If contaminants are identified in future programs then further management actions will be applied.

The remaining parameters of water clarity, suspended sediments and sedimentation will be the primary focus of the monitoring program under this EMP with the objective being to ensure water quality impacts from dredging and disposal works are within the natural range of water quality within the areas to be impacted in accordance with the Guideline objectives.

During the long term strategy investigation TMR collated historical baseline water quality monitoring data to measure the seasonal natural variability of water quality on which to base compliance triggers. From this data an event based trigger of 60NTU was defined and the 80th percentile of 17.1NTU was defined. Both these trigger values are used as instantaneous and cumulative action triggers for the management of dredging works.

TMR’s experience from other dredging projects is that sedimentation or suspended solids are not effective parameters for use in compliance monitoring, however both have an important role to play in the monitoring framework. For this reason sedimentation will be assessed in the BACI assessment of the identified sensitive sites and a number of suspended solids samples will be collected throughout the dredging works and plotted against the turbidity data to define a correlation for use in assessing impacts.

Turbidity provides the most reliable parameter to trigger actions during the dredging event because this parameter has shown to have correlations to sedimentation and suspended solids trends (Rosslyn Bay (2013)) but can be easily measured onsite and instigate immediate management actions.


In addition to this to support long term management of the harbour TMR will install 2 light loggers for the duration of the works and keep them in place for 4 months following the commencement of works (subject to mobilisation of the contractor completing these works) and hence cover the works period (approximately 8-10 weeks) and the beginning of the following high growth period. These loggers will not be used for compliance but will be used in conjunction with the compliance monitoring to assess if any light impacts occur at the sensitive seagrass sites.

Objective

To provide protection to the biological integrity of waterways adjacent to the work site

Environmental Risk

The environmental risks to water quality for this project include;

1) Dredging works generate a plume that may impact on adjacent seagrass meadows and offshore coral communities.

2) Tail water release from the reclamation area, may generate a plume that may impact on adjacent seagrass meadows and offshore coral communities.

3) Placement to offshore site may generate a plume that may impact on adjacent seagrass meadows.

2.6 Dredging in the Harbour The primarily sandy nature of the sediment largely negates these risks because the majority of the sediment will drop out of suspension rapidly.

A cutter suction dredge (CSD) and pipeline is being utilised for this project and for this reason impacts at the dredge site will be minimal given the material is contained in the pipe. However some disturbance will occur at the dredge head. The use of a CSD and pipeline however does present risks associated with potential weather impacts on the pipeline.

2.7 Offshore Dredge Material Placement Site Because of the sandy nature of the dredge material relatively rapid settlement to the seafloor is expected. For this reason the impacts of material placed via a pipeline are expected to be maintained locally.

Although unlikely, a spill of dredged material in transit to the disposal site is a potential risk.

Impacts can be further mitigated via the placement of dredge material close to the up current boundary of the disposal area. Using modelled peak current velocities from BMT WBM (2010) and sediment settling velocities from FRC (2013) plumes should be contained completely within the extents of the disposal area.


Reclamation Placement Site

The two primary risks from placement to the land based reclamation site are. Tail water not being adequately managed in the placement area to meet turbidity release limits and subsequently the generation of plumes adjacent to the reclamation that may be transported to sensitive receptors and inadequate treatment of identified Potential Acid Sulphate Soils resulting in acid release from the reclamation area and associated impacts to sensitive receptors.

All previous sediment sampling reports (2006 and 2013), indicate that all samples are below contaminant screening levels in the NADG (DEWHA 2009). For this reason environmental risk associated with sediment contamination at the dredging and disposal site is low.

Table 2.3 Water Quality Management Strategies


Undertake monitoring as detailed in Table 3.2.3 TMR Consultant

Ensure safe and effective fuel, oil and chemical storage and handling.

Contractor

Contain any fuel, oil or chemical spills and clean up immediately. Contractor

Ensure no leakage from pipeline during transit. Contractor

Ensure dredge material is spread evenly over a defined quadrant to avoid identified seagrass meadows but also avoid mounding at the offshore site

TMR/Contractor

Ensure land based placement site is appropriately constructed and tail water is managed to meet release limits. (For CSD)

Contractor

Ensure material to be placed above Mean Sea Level is appropriately treated if found to be PASS

Contractor

Contaminants must not be released from any dredging vessel/s, support craft or dredge-related machinery to any waters or the bed and bank of any waters.

Contractor

The only contaminants to be released to surface waters are sediments disturbed whilst conducting the dredging activity, within the limits set out.

Contractor


the requirements of Section 2.7 of this EMP have been satisfied

compliance with the “Spill Response & Emergency Procedures” Strategy

monitoring shows extent of plume impact

satisfactory results of EMP implementation audits.



The results of monitoring program will be available to the contractor, ESS, TMR, DEHP and GBRMPA throughout the dredging campaign on request and the final monitoring report will be provided to DEHP and GBRMPA within 60 business days of the completion of any monitoring program.


In the event of non-compliance the response will be as per Table 3.2.3.

Adopt procedures outlined in Section 2.8.6 Incident and Non Conformance Reporting.

2.8 Waste Management

Addresses Primary Risk 6

Objective

To minimise the production of waste, and ensure waste that is produced is stored and disposed of lawfully

Environmental Risk

All TMR contractors are required to manage waste in accordance with Environmental Protection Policy (Waste) and for this reason environmental risk associated with waste management is low.

Table 2.4 Waste Management Strategies


On vessels, allocate areas for solid and liquid waste storage. Waste will not be stored outside these areas. Any waste fuels, oils or other chemicals shall be collected in separate drums and transported to an approved facility for disposal

Contractor

If wastes listed as ‘trackable wastes’ are handled or transferred, documentation in accordance with Environmental Protection Policy (Waste) will apply (refer EPP Waste).

Contractor

Waste will be removed from vessels and disposed of at an approved facility.

Contractor

Housekeeping procedures, including spillage control, will be implemented to minimise the generation of waste.

Contractor

All waste awaiting disposal will be stored appropriately Contractor



Appropriate waste receptacles are on board

All waste is disposed of lawfully.


A record/manifest will be maintained for general and regulated waste disposal. The manifest shall record the type of waste, and the point and date of disposal.


Failure to meet the performance criteria shall be recorded as a non-conformance incident and be dealt with in accordance with Section 2.8.6.

2.9 Spill Response and Emergency Procedures

Addresses Primary Risk 6:

Objective

To minimise the risk of spills or unplanned situations that might cause environmental harm.

To ensure that contingency measures are in place and implemented in the event of such spills or unplanned situations

Environmental Risk

All TMR contractors are required to confirm Emergency Response Procedures, via training prior to the commencement of works and for this reason environmental risk associated with spill response and emergency procedures is low.

The offshore booster pump presents a risk of spills and for this reason regular inspections will be required.

The Contractors vessels shall be equipped with suitable spill kits and will be operated in accordance with the Maritime Safety Queensland (MSQ) approved Shipboard Oil Pollution Emergency Plan. (See Appendix E)

Reclamation Management – Although of very low risk the potential for a structural failure of the facility needs to be considered.

Table 2.5 Spill Response and Emergency Procedure Management Strategies


All refuelling is to be done by licensed fuel suppliers in accordance with their Standard Operating Procedures.

Contractor



Refuelling will take place at wharves suited to tanker access. In the event that it is necessary for the contractor to refuel vessels or plant in the works area operations will be in accordance with industry standards.

Contractor

Provide a Construction Workplace Plan, prior to the commencement of any works.

Contractor

Maintain an Emergency Contact List with an up to date copy retained Contractor

Minimise the stored volumes of fuel, lubricants and oil in discrete containers on board vessels. When required they will be stored in a secure area and any spills will be cleaned immediately. Any visible or reasonably suspected fuel, lubricant or hydraulic fluid loss will be treated as an ‘incident’ and handled in accordance with Section 2.8.6.

Contractor

Vessel crew are to regularly check equipment for evidence of leaks and fitness of hydraulic hoses and seals, and conduct maintenance or repairs as necessary to prevent drips, leaks or likely equipment failures. Inspections of the dredge, pipeline and the booster pump(s) are to be undertaken daily to meet this requirement

Contractor

The pipeline offshore outlet point is to be inspected a minimum of once a week and directly after any storm event. During this inspection the outlet will be moved if required to ensure the dredge material is spread evenly across the designated area. The GPS position of the outlet point shall be recorded.

Contractor

For minor spills, provide spill kit including; bilge socks, heavy duty absorbent polypropylene pads, floating booms and blowback refuelling collars on vessels for use in the event a substance is spilled either on deck or to waters to handle a spill of up to 160 litres.

Contractor

For major spills, undertake actions as specified in the MSQ approved Shipboard Oil Pollution Emergency Plan. (See Appendix E)

Contractor

A register of Materials Safety Data Sheets (MSDS) relating to all hazardous substances on board, will be maintained

Contractor

Daily Visual Monitoring of the reclamation walls are to be undertaken and any concerns to be reported to TMR and Council to instigate management actions.

Contractor


Documented procedures for emergency response are available and up to date.

All vessels carry response equipment appropriate to the level of risk. The kits are restocked and accessible.

Staff have been trained in the use of the kits and in emergency response.


Contractor’s Standard Operating Procedures for Refuelling available and implemented.

No spills—if any spills do occur they are effectively contained and cleaned up.

Incident reports accurately describe any spills and response actions.

A register of MSDS for each chemical used on site is available.


The contractor will undertake audits which include:

ensuring that emergency response plans and equipment and materials are available, working an unobstructed

ensuring firefighting equipment has been serviced when required

updating the emergency response contacts list when required

hazardous materials are appropriately stored

MSDS are appropriate to the material stored.

Daily visual inspections of the reclamation are undertaken

If emergency response procedures are initiated, or any spills of hazardous materials occur, the action will be regarded as an incident and reported as described in Section 2.8.6.

Equipment that uses fuel, lubricants, and/or hydraulic fluid, will be inspected during scheduled maintenance for the condition of hoses, valves, seals and reservoirs.

Storage areas, containers, transfer hoses and valves for fuel/lubricants/hydraulic fluids will be inspected during maintenance.


Failure to meet the performance criteria shall be recorded as a non-conformance incident and be with in accordance with Section 2.8.6.

In the event of a spill, the spill source will be immediately isolated, stopped and contained.

In the unlikely event a structural failure of the reclamation area occurs placement works are to immediately cease, immediate actions are to be taken to minimise impacts outside the approved the works and the incident is to be reported to TMR and the ESS, so that remediate actions can b instigated

2.10 Noise and Air Quality

Objectives

To minimise the impact of dredging and disposal of dredged material on noise-sensitive receptor

To minimise the impacts of the proposed dredging works on air quality.

Environmental Risk

Low provided management strategies are followed


Table 2.6 Noise and Air Quality Management Strategies


Conduct all works during hours agreed by GBRMPA and DEHP prior to start of dredging project

Contractor

Notify all nearby businesses and residences of the work hours, and give a point of contact for any questions or problems.

TMR

Equipment will be maintained and operated to ensure that unnecessary noise or air emissions will be prevented. In accordance with table 1, attachment F

Contractor

In the event that a complaint is received, the relevant details will be recorded on the Complaints/Query Report Form - Appendix E.

Contractor

All vessels are to be suitably maintained and fit for the work to be undertaken.

Contractor

Odours or airborne contaminants which are noxious or offensive or otherwise unreasonably disruptive to public amenity or safety must not be released to any nuisance sensitive place or commercial place.

Contractor


All nearby businesses are notified prior to commencement of the works.

Response to all complaints about noise or air quality issues initiated within 24 hours of receipt.

Machinery is operating in a fit-for-purpose manner.

No odours or airborne contaminants released.


All complaints will be recorded on the Complaints/Query Report Form (Appendix E) and referred to TMR.


Failure to meet the performance indicators shall be recorded as a non-conformance and will be dealt with in accordance with Section 2.8.6.

All complaints received will be investigated immediately, taking note of prevailing wind conditions and noting any evidence that relates to the complaint.

Defective vessels are to be repaired prior to continuing work.

Changes to hours of work or dredging procedures should be considered if practical and potentially beneficial.


2.11 Environmental Management Plan Procedures This component of the EMP establishes the procedures for implementation of the environmental management plan

2.11.1 RESPONSIBILITY AND IMPLEMENTATION No. Procedure/Action Responsibility

1.1 Amend/revise EMP document when required, gain GBRMPA and DEHP sign off and supply a copy to any contractors to whom it is relevant and publish on TMR website

TMR

1.2 Ensure satisfaction with the EMP and all conditions contained in all permits (attachment F) that relate to the works.

Contractor

1.3 Oversee dredging and ensure compliance with the monitoring program

TMR / Superintendent

1.4 Conduct hydrographic surveys as needed Superintendent

2.11.2 COMMUNICATION AND REPORTING No. Procedure/Action Responsibility

2.1 All project staff will heed any lawful direction by the Environmental Site Supervisor or any duly Authorised Officer of the State or Commonwealth. (The ESS can instruct the contractor to cease works and provide permission to restart works on environmental grounds)

Contractor/ Superintendent / TMR

2.2 Any actions required under the EMP procedures shall be duly documented.

Contractor/ Superintendent / TMR

2.3 Copies of dredge logs (including plume sketch), dredge and placement locations, wind conditions and a summary of dredging progress shall be provided to the ESS on request

Contractor

2.4 Copies of the field notes from the water quality monitoring will be provided to the ESS on request

TMR

2.5 A final report following completion of the works will be forwarded within 60 business days to DEHP and GBRMPA. This report will include the items in appendix G

Contractor/TMR /Superintendent


2.11.3 DOCUMENTATION AND RECORD KEEPING No. Procedure/Action Responsibility

3.1 Primary control of EMP document TMR

3.2 Ensure the EMP and associated specific project instructions are readily accessible to personnel carrying out activities associated with dredging.

Contractor

3.3 Ensure records are maintained with respect to, non-conformance and incidents, environmental training, complaints and results of any audits

Contractor

3.4 Plant maintenance records are kept and used to program repairs and vessel/plant maintenance as required

Contractor

2.11.4 ENVIRONMENTAL AWARENESS TRAINING No. Procedure/Action Responsibility

4.1 Ensure all personnel performing activities related to environmental management of dredging are trained, qualified and competent

Contractor

4.2 Ensure all personnel performing activities are aware of their responsibilities under the EMP.

Contractor

4.3 Ensure all personal performing activities have PPE and are trained in spill response and emergency procedure management strategies

Contractor

2.11.5 COMPLAINT HANDLING PROCEDURES No. Procedure/Action Responsibility

5.1 Main point of contact for complaints, provide a contact number to Contractor to refer complaints.

Superintendent

5.2 Ensure complaints are forwarded to TMR representative Contractor

5.3 Upon receipt of a complaint, all relevant details will be obtained and documented on the Complaints/Queries Report Form (Appendix E)

Superintendent

5.4 All complaints responded to within 24 hours Superintendent


2.11.6 INCIDENT AND NON-CONFORMANCE REPORTING No. Procedure/Action Responsibility

6.1 In the event of an environmental incident, take immediate action to secure safe conditions and prevent further environmental harm, and then immediately notify the Superintendent, the Harbour Master and the ESS of the type and extent of the incident

Contractor

6.2 In the event of an environmental incident details of the incident shall be recorded on the Environmental Incident/Non-conformance Report Form (Appendix E)

Contractor

6.3 Notify DERM and GBRMPA representatives of the incident within 24 hours of the incident

TMR / Superintendent

6.4 Cases of non-conformance with the EMP will be recorded on the Environmental Incident/Non-conformance Report form (Appendix E) and reported to TMR within 24 hours of the incident

Contractor


3 Environmental monitoring program

3.1 Monitoring Program An environmental monitoring program has been established for this dredging project EMP. The implementation of the monitoring program will ensure that the requirements of the EMP are being met. All monitoring will be undertaken by suitably qualified persons in accordance with the monitoring requirements. TMR will submit a report of the monitoring outcomes at the conclusion of the dredging campaign or at the conclusion of the specified monitoring period to GBRMPA and DEHP and present this to the TACC for discussion in support of future works proposals.

There are a number of components for which environmental monitoring is required, including:

Sediment characteristics;

water quality;

flora and fauna;

access arrangements;

noise;

air quality;

waste management;

hazardous substances; and

community consultation.


Figure 3.1(a) Monitoring Sites overlayed on mapping undertaken in FRC (2013)


Figure 3.1(b) Monitoring Sites overlayed on mapping undertaken in FRC(2013)


Table 3.1 Environmental Monitoring Program – Port of Cooktown Harbour Dredging

Issue Monitoring Frequency / timing Performance criteria Responsibility

Sediment Characteristics

Prior to each dredging event undertake sampling in accordance with NAGD(2009) and ASS Guidelines see details table 2.1

Prior to each dredging event

Sediments must be suitable for ocean disposal in accordance with NAGD (DEWHA 2009) unless placement to supplementary option.

TMR (Completed June 2013)

Water Quality Refer to table 3.2.3 and section 3.2 for the detailed water quality monitoring strategy

Refer to table 3.2.3 and section 3.2

No impact on surrounding ecological features

TMR Consultant (GHD)

PASS Management*

All in accordance with ASSMP Appendix H and water quality monitoring table 3.2.3 and section 3.2

fauna and flora

Visual inspection for any sign of marine flora and fauna (turtles, dolphins, dugongs, crocodiles and whales) in accordance with table 2.2

Undertake BACI Coral and Benthic monitoring in accordance with table 3.1.1 and section 3.3

Undertake seabed monitoring in accordance with table 3.4 and section 3.4

Weekly inspection of offshore outlet to ensure material is spread within the approval area. GPS co-ordinates recorded

Refer to table 3.1.1 and section 3.3

No deaths/injuries attributable to works.

No long term impact on surrounding ecological features

All material to be placed within the approved placement site and no mounding of material to occur.

Contractor

TMR

TMR

Contractor

Access arrangements

Visual inspection to ensure Port navigation is not restricted.

Daily (during dredging works)

Minimal restriction to access.

Contractor / TMR

Noise Investigation of noise complaints.

As required in response to any noise complaints. (during dredging works)

Complaint responded to within 24 hours and all complaints resolved.

Contractor and Superintendent

Aural inspection of equipment for excessive noise

Weekly (during dredging works)

Noise levels in accordance with equipment specification.

Contractor


Issue Monitoring Frequency / timing Performance criteria Responsibility

Waste management

Visual inspection of disposal area for litter.


No uncontained litter /waste.

Contractor

Hazardous substances

Visual inspection of the vessel, booster pump, pipeline, disposal area and immediate vicinity of dredge for evidence of spills.


No spills. Contractor

Visual inspection of chemical storage areas.

Weekly and following substantial rainfall events. (during dredging works)

Storage capacity sufficient to contain spills and no breach of storage area.

Materials stored as per relevant standards.

Contractor

Community consultation

Review of complaints records for any increasing trend in number of complaints.

Outcomes of dredging event to be discussed with TACC to guide future management strategy.

Weekly (during dredging works)

No increasing trend in number of complaints.

All complaints addressed within 24 hours.

Superintendent / Contractor

Table 3.1.1 Campaign Specific Monitoring Strategy

Water Quality Monitoring Benthic/Coral Monitoring

Disposal site seabed monitoring

Campaign – Offshore Disposal

WQA– vessel based trigger plume monitoring

WQB – Light logger data collection at sensitive sites WQ6 and WQ3

WQC – daily sketch of plume extent at dredge and placement site (disposal or reclamation site)

BMA– Pre and Post (used to define specific placement areas within the disposal site eg. A specific placement extent within the approved area has been allocated based on the 2013 Benthic survey )

SM – pre, post and annually between dredge events

Campaign - Reclamation Disposal

WQA– vessel based trigger plume monitoring

Daily monitoring tail water outlet and reclamation area in accordance with ASSMP

WQB - Light logger data collection at sensitive sites WQ6 and WQ3

BMA– Pre and Post Pre and post survey


WQC – daily sketch of plume extent at dredge and placement site (disposal or reclamation site)


3.2 Water Quality Monitoring In developing the monitoring program, the following key issues were considered:

For both dredging and dredged material placement activities, the key potential impacting process is modification to water quality, particularly increased turbidity levels and potential pH changes for the land based option;

Communities that are most sensitive to increased turbidity are those that derive energy from light (i.e. plants and corals containing symbiotic algae). Within the study area, the most notable sensitive receptors are seagrass.

The key habitat values identified in the study area include the seagrass beds of Sachs Spit and around the base of Grassy Hill and to a lesser extent (due to prevailing currents carrying the dredge associated turbidity plume away) the rocky sub-tidal reef communities approximately 500m offshore(east) of the channel.

When assessing potential impacts there is a need to consider natural variability in monitoring indicators. As discussed in Section 3, there is great natural variability of local background turbidity in the study area due to seasonal influences of storms, wind induced wave action, river discharge and cyclones in the wet season. In this context, turbidity changes induced by dredging will only result in adverse environmental effects when the turbidity generated is outside the natural background range of turbidity levels in the area (Orpin et al. 2004);

Dredging and dredged material disposal will also lead to the temporary loss of benthic organisms. However, case-studies undertaken in tropical and sub-tropical coastal environments indicate that benthic fauna communities show rapid recovery after disturbance, such as dredging, in dynamic environments such as Cooktown entrance. For this reason, physical disturbance associated with dredging and dredged material disposal is not considered a key issue in the context of this monitoring program.

Based on the above considerations, a water quality monitoring programme is recommended to be undertaken during dredging and dredged material placement activities as outlined below.

The aim of the environmental monitoring program is to assess changes to water quality (primarily related to turbidity plumes) as a result of dredging or dredge material placement in order to instigate management actions. In addition to this it is proposed to install two light loggers for the duration of the works and approximately 1 month after the conclusion of the works to provide a light dataset at the sensitive sites, to capture any changes and feed these into the future management of the Port of Cooktown.

Performance criteria and monitoring sites for the dredging operation have been established with the primary objectives of protecting adjacent seagrass meadows and coral communities and to ensure the turbidity generated by the dredge or disposal method is not outside the bounds of natural variability of turbidity concentrations normally experienced in the Cooktown harbour area.

The primary elements of the Water Quality Monitoring Program are focused on two 2 week campaigns, one at the commencement of dredging works (when placement is occurring to the reclamation area) and a second in the middle of the program (when offshore placement is occurring). These campaigns will effectively assess if dredging and disposal works are meeting the proposed objectives.


Two campaigns are proposed to ensure the impacts from both placement alternatives are understood.

In addition to this a daily assessment of the plume extents at the dredge and placement site will be made via a sketch and distance estimate for each day of the works. This data will be compared with the intensive monitoring data outcomes to confirm that sensitive sites are not being impacted. Otherwise further management actions will be instigated and further physical monitoring will be instigated to measure the effectiveness of changes to meet the objectives of the EMP.

The intensive vessel based monitoring campaigns will focus on assessment of impact extent of created plumes from dredge and material placement options against the impact trigger levels.

Works are proposed to commence with placement to the reclamation area, TMR experience indicates that the start of placement works are likely to result in increased turbidity outside the reclamation area for a short period until a layer of material is placed against the wall and the geotextile is bedded. The intensive monitoring during this period will identify the extent of turbidity outside the structure with an aim to ensure sensitive sites are not impacted during this bedding down period.

Following the intensive monitoring program daily monitoring of the reclamation release point will occur for the duration of the dredging works if placement is occurring to the land based site. Daily monitoring of the reclamation area water will also occur in accordance with the ASSMP.

An ‘event trigger value’ of 60 NTU was derived from the baseline water quality monitoring as a short term performance condition for the previously identified sensitive environments. The 80th percentile turbidity value has also been derived for the study area in accordance with Queensland Water Quality Guidelines, using long term water quality monitoring data for the study area from CYMAG and the WBM study (WBM 1996 - refer Section 3). The water quality monitoring program utilises both these trigger values as performance criteria to ensure dredging works are within the scope of natural variability in the study area. The long term dredge strategy indicated that long durations (in the order of a month) of sub light conditions are required to impact on seagrasses and given such extreme conditions are not going to occur for this scale of works the defined trigger levels better reflect a management framework to ensure water quality conditions are consistent with natural background variability and hence mirror the natural thresholds these receptors are accustom to.

The baseline water quality data collected by Cape York Marine Advisory Group (CYMAG) from 2002-2007 confirms that substantial natural elevated turbidity events occur naturally in the river entrance area around the study area. This data and data collected by BMT WBM (as part of WBM 1996) has been analysed to set trigger and recovery values and duration times to characterise the typical magnitude and duration of these naturally occurring events. The existing data was based upon surface measurements (ie. at 0.2 - 0.3m depth), therefore the following measurement criteria are similarly defined.


Table 3.2.1 20th and 80th percentile and median water quality values

pH Temp

(°C)

Conductivity

(mS/cm)

Salinity DO

(mg/L)

DO

(%SAT)

Turbidity

(NTU)

20th percentile 7.59 23.98 49.51 32.28 5.88 89.64 7.7

Median 8.12 26.85 52.30 34.70 6.52 95.28 15.5

80th percentile 8.21 28.96 53.64 35.53 7.99 108.12 17.1

Median (event based)

60

Water quality monitoring sites to be used in the implementation of the monitoring program are shown in Figure 3.1(a) and Figure 3.1(b). Monitoring site WQ7 will be located outside the reclamation structure to monitor the release of tail water.

Site WQ1 is the control site to assess ambient conditions at the time of dredging (this site will be up-current of the dredge so is not fixed), in order to compare water quality downstream of the dredger at Site WQ2 (and at Sites WQ3 and WQ4 if necessary) to ambient conditions. The control site will give an indication of baseline turbidity levels so that high turbidity levels caused by wind induced wave action, currents, storms and river discharge may be separated from those resulting from dredging.

Site WQ2 is a variable site that will be monitored via a transect away from the dredge (down current) to capture the extent of the plume during the works.

Turbidity levels at control site WQ1 will be compared to dredge site WQ2 to identify the extent of dredging impacts.

For a campaign where dredge material is placed at the offshore DMPA site, WQ1(a) is a site up-current of the placement area as the background control and WQ5(a) is a variable site that will monitored via a transect away from the placement area to assess the extent of the plume impact.

For a campaign where dredge material is placed to the land based reclamation WQ1(b) will be located up current of placement area (and may be the same as WQ1). WQ5(b) is a variable site that will monitored via a transect away from the reclamation site to assess the extent of impact. As part of the monitoring campaign an additional monitoring site within 50m of the release area called WQ7 will be monitored on a daily basis to monitor tail water release limits.

Sites WQ3, WQ4, WQ6 and WQ8 represent sensitive environments of seagrass beds and possible coral communities that could potentially be effected by dredge and placement plumes.

As outlined below, Sites WQ1, WQ1(a) and WQ1(b) will be sampled as up-current background controls at the start of each monitoring run. (eg. WQ1 then WQ2 (transect), WQ3, WQ4, WQ8 to assess dredging impact, WQ1(a) then WQ5(a) (transect) and WQ6 to assess offshore placement, WQ1(b) then WQ5(b)(transect), WQ3, WQ4, WQ8 to assess land based placement.


Turbidity trigger values have been derived from long term water quality monitoring data and will apply to the sensitive sites. Plume impacts are not expected to impact sensitive sites and for this reason the Interim transects will identify the extent of plume impacts and provide an early warning to instigate management actions in the unlikely event plumes approach sensitive areas. However, if the trigger values are exceeded at the sensitive sites as a result of dredging or placement, dredging or placement works will be amended to reduce these impacts. However if the trigger values are exceeded for greater than the specified durations this will be considered an exceedance and dredging is to be suspended until turbidity falls below the trigger values.

For placement to the land based reclamation area the tail water release shall be monitored on a daily basis at location WQ7 for the duration of the project to monitor against the release action trigger values for turbidity and pH. If these values are exceeded action criteria are applied as in table 3.2.3 and monitoring of Total Titratable Acidity, dissolve iron and total iron will also be undertaken in accordance with the ASSMP (Appendix H).

Table 3.2.2 Trigger, duration and recovery values for sites

Monitoring criteria Trigger Value Outcome

“Event based” criteria 60NTU or 10% above background (where background above 60NTU) for an instantaneous (short duration) event. (2 consecutive 3 hourly readings)

Ensure specific dredge related “events” are below this criteria.

Project duration criteria 80th percentile

17.1NTU or 10NTU above background (where background above 7.1NTU) for greater than 2 tidal cycles.

Ensure cumulative turbidity impacts are below the 80th percentile in accordance with the intent of the Water Quality Guidelines.

Reclamation outlet Ph standard (ASSMP)

Maintained between 7 and 8.5 background

Ensure pH is maintained within the specified range.

Compliance for water quality parameters is based upon a comparison of data from the control site and adjacent sensitive environments. Water quality is to be monitored at the controls (WQ1, WQ1(a) and WQ1(b)), and at the sensitive sites (WQ3, WQ4 and WQ6) if the trigger values are exceeded at the sensitive sites for longer than the allowable duration as a result of dredging or placement then an exceedance event has occurred which will suspend dredging. Turbidity at sensitive receptor sites and pH (for WQ7) are the only water quality parameters that have ‘action’ trigger values. Monitoring including transects will be undertaken at the dredge and placement areas (WQ2, WQ5(a) and WQ5(b)) to assess plume extent. Modelling data and sediment characteristics indicate that dredge and placement related impacts will not reach sensitive areas.


Monitoring shall be undertaken for an initial period of 14 days (at the reclamation site) and then a further 14 days at the midpoint of the dredging campaign when placement is occurring to the offshore site. If the dredging operation is suspended at any time during these monitoring periods for excessive turbidity at the sensitive sites, the monitoring will be continued throughout the entire dredging campaign. All readings during monitoring events are to be taken at surface, mid-depth and at the bottom of the water profile.

For sites WQ1, WQ1(a) and WQ1(b), readings are to be undertaken immediately prior to commencement of dredging each day (for WQ1) and immediately prior to the monitoring of each element (dredge area, offshore placement area, land based placement area) or more often as required to accurately represent background conditions. Site WQ2 and WQ5 ((a) or (b)) are variable sites, and will change in location according to the position of the dredger, the tidal state and the direction of the current. These sites will include transects from the source of disturbance (eg dredge or placement site) at equal intervals until background conditions are reached in the down current direction. A transect will be collected at least once a day for the dredge area and the placement area. (Also in addition to this WQ5(b) 300m down drift of the dredge will be captured every three hours during monitoring events)

The transect at WQ5(a) is to be captured at least an hour following commencement of placement works on any day for offshore placement.

Sites WQ3, WQ4 and WQ6 are the sensitive seagrass and coral community environments identified and for this reason are the subject of compliance triggers. WQ8 has been identified as a possible sensitive site however evidence presented is anecdotal and is subject to the pre-dredge benthic survey of this area. In the event the pre-dredge survey identifies high ecological values at WQ8 this will be included as an identified sensitive site and be treated in the same way as WQ3, WQ4 and WQ6 with respect to the monitoring program.

Field sampling methodology for water quality monitoring should follow the Australian guidelines for water quality monitoring (ANZECC, 2000).

At each sample site 3 replicates will be taken at depths of 1m (surface), mid water column (middle) and within 1m of the seabed (bottom). With the exception of WQ7 which will be a single sample <50m downstream of the release point which will have turbidity and pH as action criteria The following parameters will be recorded at each site:

GPS location

Turbidity

Suspended Solids

pH

Salinity

Conductivity

Temperature

Weather and sea conditions, and other observations, will also be recorded at each site.

The water quality monitoring program will be in accordance with table 3.2.3.


For the duration of the dredging campaign daily plume extents will be recorded via a sketch of plume extent within the dredge and placement works areas. In the event the extent of plume is observed at distance in excess of that observed in the intensive monitoring program from the dredge or placement area. Physical monitoring of background sites and sensitive sites WQ3, WQ4 and WQ6 will be undertaken to assess if triggers have been reached in accordance with Table 3.2.3.

Light loggers will be installed at the two sensitive seagrass sites WQ3 and WQ6 for four months in total from the start of works (to cover the works and a recovery period following), and the visual extent of the plume will be recorded. In the event the visual extent of the plume is identified as reaching any of the identified sensitive sites (in the periods not covered by the intensive monitoring works) then physical monitoring will be undertaken to assess if an exceedance has occurred.


Table 3.2.3 PROPOSED WATER QUALITY MONITORING SCHEDULE

Site Description Performance Criteria Response Frequency

Dredge and Placement site (disposal or reclamation site)

Daily observation of plume extent and sketch of plume, with distances

Plume extent to remain within the extent observed during the intensive monitoring program

Instigate physical monitoring of sensitive sites to assess if triggers have been breached

Daily

WQ1

Control site (Dredging); Mouth of Endeavour River None None

At least daily during monitoring periods for dredging operations (however may be required to capture up-current control) and at least daily. Start one day before commencement of dredging works.

WQ1(a)

Control site (Offshore Placement Area); None None

At least daily during monitoring periods for dredging operations (however may be required to capture up-current control more frequently). Start one day before commencement of dredging works when disposal commences at the Offshore Placement Area.

WQ1(b)

Control site (Reclamation Placement Area); None None

At least daily during monitoring periods for dredging operations (however may be required to capture up-current control more frequently). In some tidal conditions WQ1 and WQ1(b) may be the same point. Start one day before commencement of dredging works.

WQ2 Dredge channel

Capture a transect of water quality measurements immediately behind the dredge at a safe operating distance and then 50m, 100m, 200m, 300m, 500m and 800m away from the dredge

If plume comes within 300m of identified sensitive areas, amend dredge operations to reduce extent of plume.

Once per day, getting an ebb and flood tide every two days



in a down-current direction to assess extent of plume impact

WQ2(i) Dredge Area

If turbidity greater than 17.1 NTU or 10NTU above WQ1 or WQ1a - 300m down current of the dredge

Monitor sites WQ3 and WQ4 3 hourly

Captured once every 3 hours during monitoring events at least 1 hour before/after slack water for continuous placement

WQ3 & WQ6 Seagrass

If turbidity greater than 60NTU or 10% above WQ1 (Where WQ1 is greater than 60NTU) (for two consecutive 3 hourly readings)

OR

If turbidity greater than 17.1 NTU and 10NTU above WQ1(when WQ1 greater than 7.1NTU) (for greater than 2 tidal cycles )

Suspend dredging until turbidity falls below trigger value

Every 3 hours during monitoring periods for the dredging and placement operations.

In the event dredging works are suspended based on this criteria the intensive monitoring campaign will extend for the remaining dredging program.

WQ4

Seagrass coral/rocky reef

As Above

WQ8

Possible sensitive rocky reef area (survey to confirm)

As Above (if pre-dredge survey identifies a sensitive site otherwise this area will not be a trigger)





WQ5(a)

Down current of DMPA placement location

Capture a transect of water quality measurements immediately behind dredge at a safe operating distance and then 50m, 100m, 200m, 300m, 500m and 800m away from the placement pipe in a down-current direction to assess extent of plume impact

If plume comes within 300m of identified sensitive areas, amend dredge operations to reduce extent of plume.


WQ5(b)

Down current of the reclamation release point

Capture a transect of water quality measurements immediately behind dredge at safe operating distance and then 50m, 100m, 200m, 300m, 500m and 800m away from the placement pipe in a down-current direction to assess extent of plume impact

If plume comes within 300m from placement area to identified sensitive areas, amend dredge operations to reduce extent of plume.


WQ7

<50m of reclamation area

If turbidity greater than 60NTU and 10% above WQ1 (for WQ1 above 60NTU) (for two 3 hourly

Amend placement methodology. If values not regained to below trigger values within two tidal cycles

Once per day for the duration of dredging works while placement to reclamation site

If exceedance occurs 3 hourly monitoring of sensitive sites to occur.



readings) Instigate Monitoring of sites WQ3 and WQ4,

If values exceeded after five days of initial placement to the reclamation area. Cease all discharges until turbidity is below trigger value

WQ7

Within 50m of outlet location

pH maintained within range of 7 to 8.5

Cease tail water release and/or dredge material placement until treatment is completed and reclamation water meets trigger levels

A minimum of once per day for the duration of dredging works while placement to reclamation site

If exceedance occurs 3 hourly monitoring required

Conditions subject to ASSMP requirements

WQ7

Within 50m of outlet location

Total Titratable Acidity, dissolve iron and total iron

Cease tail water release and/or dredge material placement until treatment is completed and reclamation water meets trigger levels

Weekly during reclamation placement period

3.3 Benthic and Coral Monitoring The water quality monitoring, as discussed in section 3.2, will guide the operational management of the works to minimise impacts to sensitive receptors, however a Before After Control Impact (BACI) monitoring program for seagrass and coral will be undertaken to verify the effectiveness this water quality monitoring strategy and the adopted trigger values.

BMA – Seagrass Monitoring

The monitoring will involve an assessment of 3 replicate transects (50m long) across the seagrass patches located at WQ3 and WQ6 and at a suitable control site, prior to the commencement of the dredging works and at the conclusion of the dredging works.


A quantitative comparison of the seagrass species, cover, health, extent and additional sediment depth (if any) between the two monitoring events will be made at 2m intervals along each transect using a towed video. Any changes between the monitoring events will be evaluated, in relation to the results for the control site, to identify if the changes are as a result of the dredging and placement works. The light logger data and turbidity data will provide a record of the conditions present in the field during dredging works.

BMA – Coral Monitoring

A small rocky reef identified 500m east of the works area WQ4 is highly unlikely to be impacted by the works given dominant wave and tidal currents from the works area are away from this site. This rocky reef community will be monitored involving a quantitative assessment of 3 replicate transects at WQ4 and at a suitable control site, prior to the commencement of the dredging works and at the conclusion of the dredging works.

A detailed quantitative comparison of the species, cover, health (including disease and bleaching) and sedimentation depth (if any) will be made at two metre increments along each transect captured by a towed video. Any changes between the monitoring events will be evaluated, in relation to the results for the control site, to identify if the changes are as a result of the dredging and placement works.

In addition to this an investigation survey of a “possible” rocky reef community at Grassy Head south of the works area will be undertaken at WQ8, TMR has only anecdotal evidence for this site but has included an investigation of this for completeness. In the event a coral community is identified this community will be included as a sensitive site and monitored as part of the BACI monitoring program, with the same methodology as WQ4.

3.4 Hydrographic Survey Monitoring From historical dredging and placement activities placed sediment has been shown to flatten out across the local vicinity of the disposal area. For this reason it is critical that the seabed in the vicinity of the disposal site is monitored to improve understanding of the actual bed level changes.

In order to achieve this, the following monitoring is proposed:

Undertake pre and post dredge bathymetric surveys of the offshore disposal site (when utilised) and map the seabed in the vicinity of the disposal site as indicated in figure 5.

Undertake annual surveys of the dredge area and disposal area as indicated in figure 5.

Table 3.4: Disposal site monitoring

Location/Aspect Sites Monitoring Frequency Performance Criteria

Survey Area shaded in figure 5

bed level Pre and post dredge + annual

Assess redistribution process


4 References Ahern, C.R., McElnea A. E. & Sullivan L. A., 2004, Acid Sulfate Soils Laboratory Methods Guidelines, Queensland Department of Natural Resources, Mines and Energy, Indooroopilly.

ANZECC & ARMCANZ, 2000, Australian and New Zealand Guidelines for Fresh and Marine Water Quality, report prepared for National Water Quality Management Strategy, Australian and New Zealand Environment and Conservation Council & Agriculture and Resource Management Council of Australia and New Zealand.

BMTWBM 2010, Long Term Dredging Strategy: Port of Cooktown, Feb 2010, Brisbane

Coles, R.G., McKenzie, L.J., Rasheed, M.A., Mellors, J.E., Taylor, H., Dew, K., McKenna, S., Sankey, T.L., Carter, A.B. and Grech, A. (2007). Status and Trends of Seagrass Habitats in the Great barrier Reef World Heritage Area. Report to the Marine and Tropical Sciences Research Facility. Reef and Rainforest Research Centre Limited, Cairns (122 pp.).

CYMAG (2008) http://www.cymag.com.au/

DEHP (2012) Queensland Coastal Plan, Department of Environment and Heritage Protection, http://www.ehp.qld.gov.au/coastalplan/pdf/qcp-web.pdf

DEWHA (2009) National Assessment Guidelines for Dredging, 2009, Commonwealth of Australia, Canberra

Environment Australia 2002, National Ocean Disposal Guidelines for Dredged Material. Commonwealth of Australia, Canberra

FRC Coastal Resource & Environmental (2000). Study of Seagrass, Benthic and Epibenthic Communities, Cooktown: Monitoring of Spoil Disposal. Commissioned by Queensland Transport.

FRC environmental, 2007a, Sediment Sampling and Analysis Wellington Point Southern Boat Ramp, report prepared for Queensland Transport.

FRC Environmental (2013) Sediment Sampling and Analysis – Port of Cooktown, 2013, Brisbane

GBRMPA (2011) Dredge Material Disposal Areas – Draft Guidance for small scale dredge projects in the Great Barrier Reef Marine Park, 2011, Townsville

GHD (2006). Cooktown Harbour Dredging Project: Sediment Sampling and Analysis Report.Commissioned by Queensland Transport.

GHD (2006). Cooktown Harbour Dredging Project: Offshore Spoil Disposal Area: Field Fauna/Flora Assessment. Commissioned by Queensland Transport.

Joint Nature Conservation Committee, 2004, Guidelines for Minimising Acoustic Disturbance to Marine Mammals from Acoustic Surveys, Joint Nature Conservation Committee [online] http://www.jncc.gov.uk/marine

McIwem, D. 2006, Likely sensitivity of bottlenose dolphins to pile-driving noise, Water and Environment Journal 20:48-54.


http://www.cymag.com.au/icreate/default.asp?q=27

http://www.jncc.gov.uk/marine

Pearson, T. H. & Rosenberg, R. 1978, Macrobenthic succession in relation to organic enrichment and pollution of the marine environment, Oceanography and Marine Biology Annual Review, 16:229-311.

Robinson, J. E., Newell, R. C., Seiderer, L. J. & Simpson, N. M., 2005, Impacts of Aggregate Dredging on Sediment Composition and Associated Benthic Fauna at an Offshore Dredge Stein the Southern North Sea, Marine Environmental Research, 60: 51-68.

Underwood, A. J. 1994, ‘On Beyond BACI: Sampling Designs that Might Reliably Detect Environmental Disturbances’, Ecological Applications, 4(1), pp. 4-15.

Voisey and Apelt (2001) Recent Dredging Projects in Sensitive Areas in Queensland, Research Report, CRC Sustainable Tourism, University of Queensland, Brisbane

WBM Oceanics (1996). Final Impact Assessment Study, Dredging of the harbour at Cooktown, Document no. 9264.R1.2, April 1996. Commissioned by Queensland Department of Transport.


Appendix A - Port of Cooktown dredging area

Department of Transport and Main Roads Version 1.7

Appendix B - Offshore Placement area


Appendix C - Land-Based Reclamation Placement area


Appendix D - Historical Sediment sampling data Available on request from Boating Infrastructure email: [email protected]


Appendix E - Campaign specific EMP Attachments

Birdon EMP specific to this project and plant Refer also to the Birdon IMS and IMS Procedures.

Birdon Environmental Policy

Incident/Complaint/Risk/Query and Response Form

Contact List – Notifications

Daily Dredge Log / Checklist items

Fuel Transfer Procedure from Road Tanker to Dredge

Emergency Spill Response Procedures

Waste Manifest

Training & Induction Record

Hazardous Substances Register

Communications & Reporting

Documentation & Records

Incidents / Complaints / Non-conformances

Induction Training Elements


Birdon Pty Ltd: Environmental Policy

Birdon Pty Ltd operates in close proximity to sensitive environments, including freshwater ecosystems, estuarine areas and marine systems and we recognise that we hold a significant environmental responsibility. Birdon is committed to protecting these systems and the broader environment from pollution and to minimising the environmental impact of our operations.

This commitment applies to all of Birdon’s operations, including:

the facility at Port Macquarie;

marine vessel construction;

marine vessel repair and maintenance;

the safe dismantling of vessels, machinery and equipment;

dredging and associated sediment and similar materials handling; and

remediation of soils and sediments.

To sustain this commitment, Birdon will take the following actions.

Systematically manage the environmental aspects of our operations through the implementation and maintenance of an Environmental Management System based on ISO 14001:2004.

Integrate environmental considerations into project planning and decision making.

Comply with legislation, regulations, standards, guidelines, codes of practice and other requirements that apply to the environmental aspects of our operations.

Establish a set environmental objectives and targets and commit resources to achieving them, to prevent pollution and to minimise our environmental impact.

Monitor and review operations regularly to achieve a cycle of continual improvement in our environmental performance.

Promote a culture of environmental responsibility.

All Birdon employees and contractors accepting work with Birdon, are committing to operate in accordance with this Environmental Policy.

___________________________

Jamie Bruce, Managing Director


Incident/Complaint/Risk/Query and Response Form

The Incident/complaint:

Description of incident/complaint/risk:

If there is an immediate threat to human health or property, dial 000. If the incident causes or threatens to cause harm to the environment (see definition overleaf),

then follow notification protocol overleaf immediately. Any injury or death to marine species of conservation significance (mammals/turtles) – report

immediately to project manager who will report immediately to TMR.

Likely source:

If air pollution or noise complaint: Wind conditions:

Estimated volume and concentration of any pollutants:

Action taken to control the risk or the impact of the incident:

If no action taken, provide reasons.

Date reported: Date of Incident/Complaint: Reporting method: (eg phone)

Time reported: To whom was it reported? Time of incident:

Name of Complainant Contact details Staff involved:

(If no details given, note this)


Follow up:

What contributed to the incident?

Action to Prevention Recurrence:

Was the person registering the complaint contacted back and what information was given?

Systems Auditor: Signature: Date:

General Manager: Signature: Date:

Send completed form to Project Manager. Retain for four years.

Definition of Harm to the Environment – for the purposes of notification: (a) Harm to the environment is material if:

(i) It involves actual or potential harm to the health or safety or the environment that is not trivial and any act or omission that results in the pollution of the Marine Park; or

(ii) It results in actual or potential loss or property damage of an amount, or amounts in aggregate, exceeding $10,000 (or such other amount as is prescribed by the regulations).

(b) Loss includes the reasonable costs and expenses that would be incurred in taking all reasonable and practicable measures to prevent, mitigate or make good harm to the environment.

Notification Protocol For any incident causing or threatening to cause harm to the environment or of any significant events: (Notification by any means possible)

Take all reasonable and practicable measures to halt or contain adverse effects;

Then immediately: Notify Birdon’s Site Supervisor and Birdon’s Project Manager;

Then immediately: Notify Superintendent, Harbour Master, Environmental Site Supervisor

Written notification to follow within 3 days, in the form of this incident report and investigation.


CONTACT LIST Notifications Organisation Name of Contact Contact Details

During Works – if notification of any kind is required, also notify TMR

DEHP

In the event of a Notifiable Activity or incident or land being affected by a hazardous contaminant

In the event of a heritage find

In the event of a fauna injury

TMR

Monthly environmental report

Copy of all site diary/logs, completed check-sheets or other inspections

Harbour Master

Environmental Site Supervisor

(GBRMPA)


Organisation Name of Contact Contact Details

Prior to Commencement

Information signs (text and artwork to be provided by TMR) are to be installed at the site, describing the works and giving an appropriate contact number for complaints and queries.

TMR

Detailed program chart within 2 weeks of Letter of Acceptance

Construction Workplace Plan / EMP(C) within 28 days of Letter of Acceptance

Advise of commencement date 2 weeks prior

Maritime Safety Queensland


DAFF

Notification to meet self assessable code MP02 and provide EMP under council’s approval for reclamation (if placement to reclamation to occur).

GBRMPA

Notification of project commencement and schedule of works 21 days prior to commencement + EMP approval prior to commencement of works

DEHP

Notification of project commencement 5 days prior and EMP approval prior to commencement of works

Cook Shire Council


Upon Practical Completion

Maritime Safety Queensland

Advise of practical completion

Cook Shire Council

Advise of completion date 2 weeks prior


GBRMPA

Notification of project completion, surveys and analysis within 2 months of completion

DEHP

Notification of project completion, within 10 days of completion

DAFF

Advise of practical completion & provide As Constructed drawings with certification (Council)


Dredge Log Checklist

Daily Checks

Site compound check – waste collection areas clean?

Spill containment ok?

Check equipment for leaks including hoses, valves, seals & reservoirs.

Vessel check for leaks

Wind conditions

Sea state

Visual inspection – Port Navigation is not restricted.

From vessel – check with binoculars for marine species near dredge or disposal area.

Record any sightings. Follow contingency measures in Appendix J, and let Site Supervisor know.

Pipeline check

Disposal area check

Once Dredging: Sediment plume – estimate plume length

Less than 300m from dredge? (If more, or close, notify Site Supervisor.)

Check for excessive noise

Check for air pollution (after startup exhaust smoke)


Fuel Transfer Procedure from Road Tanker to Dredge. Refueling to only be undertaken during day light hours,

Safety Issues to be considered;

Relocation of dredge to wharf, punt use Ensure dredge is secure at all times Access of tanker to refueling location No smoking

Environmental Issues to be considered;

Spill kit to be onboard dredge at all times, additional spill kit onshore, check contents

Maintain grip on the filling nozzle at all times Check all hoses and fittings for damage and potential leaks Ensure there is sufficient space in the receiving tank for the volume to be

transferred Transfer Procedure

Dredge to be securely moored during the refueling procedure.

Determine the volume to be transferred (confirm with tanker driver), ensure that the dredge tank(s) has sufficient volume for the proposed transfer amount.

Confirm communication signals for stopping and starting the transfer pump with the truck driver to ensure reliable communication during the transfer. Extend the transfer hose from the tanker to the dredge fuel tank.

Place the fuel discharge nozzle in the filling pipe of the selected fuel tank. Ensure all hose connections are secure.

Open the filling nozzle by holding the trigger. Advise the tanker driver to start the fuel transfer pump. Check for any leaks.

Maintain a constant grip on the filling nozzle. The nozzle is not to be left unattended during the fuel transfer.

Constantly check the amount in the tank. As the tank level approaches the desired volume signal to the driver to slow down the transfer pump.

Stop the transfer pump when the planned volume has been transferred or the tank reaches its desired maximum operating level.

When the transfer pump has been stopped, close the fuel nozzle and remove from the filling pipe. Hold the nozzle upright to prevent spillage. Replace all caps to fuel tanks or other openings.

On completion of the transfer, return the transfer hose to the tanker holding the nozzle up to prevent any spillage.


Emergency Spill Response Procedures

All spills must be reported to the Site Supervisor.

Reporting requirements are set out in Appendix E of this EMP.

Spill Kits are located on the Dredge, fuel barge and at the site compound.

Each Kit contains the following items stored in the dedicated 240L wheelie bin;

6 off 3m long connecting floating absorbent booms

50 off Oil sorbent pads

2 pair of Gloves

2 off 20m rolls of poly rope

6 off disposal bags

A quick response is critical to prevent environmental damage.

1. Stop the source of the spill.

2. Contain and restrict the spread of the spill.

Deploy booms to surround the spill, the booms are absorbent, however if the spill is too large to be absorbed by the booms use sorbent pads to recover the remaining oil within the contained area.

Be aware of the effects of wind, waves and current on dispersal of the spill.

Extra care should be taken when working from boats.

Once initial control is established, or if immediate assistance is required, all spills are to be promptly notified to the Site Supervisor who will notify the DEHP and Project Superintendent as required.

The best method of spill management is prevention. All staff need to be vigilant and careful when refuelling and servicing machinery and equipment.


Waste Manifest Date of Disposal Type of Waste General/Regulated

waste? Disposal destination


Training and Induction Record Date Name

(and organisation if not Birdon)

Type of Training

(Induction / Emergency Response / Spill Response / Environmental Awareness)

All operators are to have the following training as a minimum: Environmental Awareness including record-keeping and incident reporting;

Emergency Response including Spill Response and Fire on Board Vessel;

Project induction

All visitors and contractors to have induction training.


Hazardous Substances Register Safety Data Sheets (SDS or MSDS) must be carried for all hazardous substances on board a vessel. It is sufficient to keep a copy in a folder in the site shed.

Communication and Reporting

Birdon personnel to heed any lawful direction by the Environmental Site Supervisor (ESS) or by any duly Authorised Officer of the State or Commonwealth Government.

Any actions required by this EMP must be documented.

Copies of dredge logs, dredge and placement locations, wind conditions and a summary of dredging progress must be provided to the ESS on request.

A final report to be provided with 60 days of completion.

Lines of reporting/communication/authority:

Documentation and Recordkeeping Ensure EMP and project-specific instructions are readily accessible to Birdon personnel.

Ensure records are maintained for:

Non-conformance and incidents and complaints;

Plant maintenance (must be used to program repairs etc as required);

TMR

Superintendent Outside agencies

Birdon

Project Manager

Birdon

Site Supervisor

Birdon

Dredging Operators


Environmental training; and

Audit results.

Incidents / Complaints / Non-conformances Complaints are to be handled using the incident report form in Appendix E, and forwarded to TMR Superintendent.

Incidents:

1) Take immediate action to prevent or reduce/contain environmental harm.

2) Then immediately notify the TMR Superintendent, the Harbour Master and the ESS in accordance with Incident Report Form in Appendix E, and the contact list attached.

3) Complete the Incident report form.

Non-conformances:

Non-conformances with the EMP are to be recorded on the Incident Report Form in Appendix E and reported to the TMR Superintendent within 24 hours.

Induction Training to include the following elements: Environmental Awareness (including Environmental Policy)

Environmental Aspects, Controls and Contingency Measures

Emergency Procedures and muster stations

Site/Project rules


Appendix F - Copy of legislative approvals Environmental Authority Permit No. EPPR01467413;

Allocation of Quarry Material permit number: ENAQ05073313;

GBRMPA Permit No: G14/36368.1;

Sea dumping Act approval No.: SD 14 / 02

Tidal Works approval Plan (Sect 86) No. C0-1-13-1 for dredging and offshore spoil placement

Tidal Works Approval for reclamation site No. IPDC00316405D11; and change approval SPD-0414-006809

Marine Plant Permit for Stage 2 of the Webber Esplanade Development No 2006CA0453.

Available on request from Boating Infrastructure email: [email protected]


Appendix G - Post dredge reporting requirements Within 60 days of the completion of dredging works and final report shall be provided to DEHP and GBRMPA representatives including the following;

1. detail of dredging and disposal locations 2. the volume of material dredged and placed 3. an analysis of the monitoring results 4. calibration information 5. report of observations of impact to occur during the works and suggestions for

improvement 6. Any other information required under approval conditions or requested by approval

authorities 7. a summary sheet of spoil disposal data for International Maritime Organisation (IMO

reporting; a. Sea dumping and Marine Park permit numbers b. Permit start/end date c. Confirmation of the quality of spoil disposed d. GPS coordinates of actual disposal; dumping method used e. Start and end dates of spoil disposal works f. Duration of works g. Protocol code; and h. Summary of monitoring


Appendix H - Acid Sulphate Soil Management Plan Available on request from Boating Infrastructure email: [email protected]


Appendix I - Benthic Monitoring Report 2013 Available on request from Boating Infrastructure email: [email protected]


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