The Wheatstone Liquefied Natural Gas (LNG) Project (the Project) produces hydrocarbon fluids from offshore fields, transports these fluids through flowlines to the Wheatstone platform (the platform) for initial processing, and then transports gas and condensate through the trunkline to the onshore gas plant for further processing. Resultant LNG and condensate are exported by vessels to the international market, and gas is available to the domestic market via a tie-in with the existing Dampier to Bunbury Natural Gas Pipeline.

The activities detailed in this EP will be conducted in Commonwealth Waters, Western Australia (WA) State Waters, and on the WA mainland, thus spanning more than one regulatory jurisdiction. Only those activities that fall within a given jurisdiction are submitted to the respective regulator to meet relevant regulations, as follows:

• the National Offshore Petroleum Safety and Environmental Management Authority (NOPSEMA) for acceptance under the Commonwealth Offshore Petroleum and Greenhouse Gas Storage (Environment) Regulations 2023 (OPGGS(E)R)
• the WA Department of Mines, Petroleum and Exploration for approval under the Petroleum (Submerged Lands) (Environment) Regulations 2012 (WA), and the Petroleum Pipelines (Environment) Regulations 2012 (WA).

Location:
The Platform (WA-3-IL) receives fluids from wells located in the Wheatstone (WA-46-L, WA-47-L, and WA-48-L), Iago (WA-46-L and WA-48-L) and Julimar-Brunello (WA-49-L) fields located off the Pilbara coast of WA.

The offshore section of the trunkline includes a Commonwealth Waters section from the platform to the State Waters boundary (WA-25-PL), and a State Waters section (TPL/25) to the shore crossing through a microtunnel. The trunkline exits the microtunnel and remains buried onshore for approximately 1 km before emerging above ground just before the onshore endpoint located upstream of the gas plant. The trunkline crosses the shore at Ashburton North, which is approximately 12 km south-west of Onslow on the Pilbara Coast, within the Shire of Ashburton, W.A.

Scope:
The Wheatstone Project Start Up and Operations Environment Plan (EP) has been updated to reflect the ownership transfer of the Julimar-Brunello petroleum titles and to incorporate the operation of the Julimar-Brunello field production system.

The EP addresses the following activities associated with the Wheatstone, Iago and Julimar-Brunello hydrocarbon system and platform:
• start-up and operation of the Wheatstone, Iago and Julimar-Brunello hydrocarbon system
• inspections, maintenance and repair (IMR) activities, and
• field support activities including support vessel activities and helicopter transfer.

This EP has been prepared in accordance with the requirements of the Offshore Petroleum and Greenhouse Gas Storage Act 2006 (Cth) (OPGGS Act) and the OPGGS(E)R, as administered and for regulatory acceptance by NOPSEMA.