Woodside is submitting a revision of the Macedon Operations Environment Plan (Commonwealth) in accordance with the Offshore Petroleum and Greenhouse Gas Storage (Environment) Regulations 2023 (Cth). The Macedon field production system (hereafter referred to as Macedon Operations) is located 40 km north of Exmouth and 100 km west of Onslow in Western Australia and commenced operation in 2013. Macedon Operations consists of four subsea wells, subsea production equipment and the Commonwealth waters portion of a wet gas pipeline. Macedon Operations also has capacity for future subsea wells, one of which may be added during the life of this Environment Plan.
The following activities are proposed to occur within production licence WA-42-L and pipeline licence WA-23-PL:

• Production of gas from four existing subsea wells
• Production of gas from one future subsea well
• Management of two plugged and suspended exploration wells with wellheads
• Transportation of wet gas from the Macedon gas field to the Macedon Gas Plant located south of Onslow in Western Australia (WA)
• well unloading and clean-up of a new well to the Macedon Gas Plant
• Routine and non-routine inspection, monitoring, maintenance and repair (IMMR) activities.

Macedon Operations will operate 24 hours a day for the 5-year duration of this EP.

Macedon Operations involves the production of gas from via four subsea wells (and one potential new operational well) and associated subsea infrastructure, with transport of the gas to an onshore processing plant via a subsea pipeline traversing State waters and extending onshore to the Macedon Gas Plant. Treated gas is then transported through the Sales Gas Pipeline to an injection point on the Dampier to Bunbury Natural Gas Pipeline. The subsea infrastructure is operated remotely from the onshore Macedon Gas Plant via an umbilical.