East Coast Supply Project - Wells Connection Environment Plan

Impacts and risks for Community groups

Seabed disturbance

Our proposed activities offshore that may result in seabed disturbance include:

• Installation of flowline and umbilical systems on the seabed
• Post-lay works and commissioning (discharges)
• Possible anchor placement for our operating vessels in bad weather
• ‘Flying’ our ROV (remotely operated vehicle) close to seabed

Impact

• Change in benthic habitat (sediments at the bottom of ocean).

Risks

Include possible:

• Marine fauna injury or mortality
• Cultural heritage changes.

Controls

To mitigate or reduce the impacts and risks of our activities we will:

• Use available seabed survey data to identify and avoid sensitive benthic features and potential underwater cultural heritage
• Implement Offshore Operational Procedures
• Implement an Underwater Cultural Heritage Disturbance Risk Management Process

Greenhouse gas emissions

Our proposed activities offshore that may result in GHG emissions include:

• Vessel operations

Impact

• An increase in GHG emissions

Risks

• Change in climate and marine systems
• Change in ecosystems
• Change in socio-economic factors

Controls

To mitigate or reduce the impacts and risks of our activities we will implement:

• Marine Assurance Process (e.g. vessel AMSA marine order compliance)
• Emissions Management Process (e.g. identify, assess and implement emissions reduction opportunities)

Light emissions

Our proposed activities offshore that may result in light emissions include:

• Vessel operations

Impact

• Change in ambient light

Risks

• Change in fauna behaviour

Controls

To mitigate or reduce the impacts and risks of our activities we will:

• Conduct a pre-campaign risk review for light
• Implement Marine Assurance Process (e.g. comply with Marine Order 30)
• Implement Light Management Measures (e.g. Vessel non-essential light positioning)

Invasive marine species

Activities

• Ballast water adjustments by vessels to maintain stability.
• Biofouling by vessels through IMS presence on submerged surfaces

​​Risks

• IMS transferred into field, establishes and spreads.
• IMS is transferred between vessels, establishes and spreads to other areas.
• IMS is transferred out of the field and establishes outside the region and spreads.

Controls

• IMS Risk Management Protocol
• Australian Biofouling Management Requirements

Unplanned interactions with marine fauna

Our proposed activities offshore that may result in unplanned interactions with marine fauna include:

• Vessel operations

Risks

• Injury / mortality to marine fauna.

Controls

To mitigate or reduce the impacts and risks of our activities we will:

• Implement Offshore Operational Procedures (e.g. distances and management practices for interacting with cetaceans)
• Implement an Offshore Victoria Whale Disturbance Risk Management Procedure to ensure our activities are not inconsistent with relevant EPBC species recovery plans

Accidental hydrocarbon release

Our proposed activities offshore that may result in accidental hydrocarbon release include:

• Vessel operations

Impact

• Change in water quality

Risks

• Change in Habitat
• Change in Fauna Behaviour
• Injury / Mortality to Fauna
• Changes to the Functions, Interests, or Activities of Other Users

Controls

To mitigate or reduce the impacts and risks of our activities we will:

• Implement a Marine Assurance Process (e.g. compliance with Marine Orders)
• Implement Marine Exclusion and Caution Zones
• Undertake ongoing engagement
• Maintain an Operational and Scientific Monitoring Program
• Have an accepted Oil Pollution Emergency Plan for the activity
• Have regulatory Safety Management Plans in place

Loss of Materials or Waste Overboard

Our proposed activities offshore that may result in Loss of Materials or Waste Overboard include:

• Installation of flowlines and umbilicals
• Vessel operations
• ROV operations

Risks

• Change in Habitat
• Injury / Mortality to Marine Fauna
• Change to Cultural Heritage

Controls

To mitigate or reduce the impacts and risks of our activities we will:

• Implement a Marine Assurance Process
• Implement Offshore Operational Procedures
• Ensure Vessels meet Emissions and Discharge standards