Detailed engineering, manufacture, supply, installation and commissioning support, quality assurance and process guarantee for a rotary Anode Furnace (AF) and ancillary equipment package. The package is expected to include: - Drive assembly and trunnions - AF Oxy-Fuel Burners (including valve train, instrumentation and control for LPG, oxygen and burner management system) - Oxidation and Reduction valve station, instrumentation and controls - Blister Handling and charging (blister transfer launder, tilting tundish and charging, launder burners) - Molten Product Handling (anode copper launder, burners) - Slag removal - Furnace refractory - All associated instrumentation - Control System for high-level automation - Spare parts Download attached 'scope doc' for further details.

Design, fabrication and supply of a hot electrostatic precipitator (ESP) including but not limited to the following equipment: - ESP Casing and structure inclusive of inlet and discharge flanges. - Discharge electrodes, Collector plates and internal gas distribution baffles. - High Voltage System. - Power conditioning equipment (if required). - Dust hoppers - Drag chain conveyors - Rotary valves with Knife gate isolation valves - All ESP Rapping / Hammering Equipment. - Insulating and Cladding of ESP Surfaces. - Miscellaneous auxiliary items including doors, and vacuum system - Heat tracing - Purge Air system for the High Voltage system - Other Electrical ancillary equipment as applicable - All associated instrumentation - Control System Download attached 'scope doc' for further details.

Detailed engineering design, manufacture, packaging for delivery, construction support, quality assurance and process guarantee for a Copper Flash Smelting Furnace Waste Heat Boiler including but not limited to the following equipment: - Waste heat boiler (WHB) - Steam Drum - Boiler Circulating Water Pumps, including back-up diesels - Blow Down Tank - Feed water tank - Feed Water Pumps - Level Control Pump - Chemical Dosing Units - Circulation Water Sample Unit - Spring Hammers - Drag Chain Conveyor with a discharge Rotary Valve and Expansion joint - Oversize Grizzly - Silencer - All associated instrumentation - Control System Download attached 'scope doc' for further details.

Project management, engineering, manufacture, supply, packaging for delivery, delivery, quality assurance and commissioning support for power and distribution transformers, including required to support the Olympic Dam Smelter and Refinery Expansion (SRE) project. This includes but is not limited to the following: - 1 off 275/132kV 140MVA KDAF transformer to supply STATCOM. Sizing and voltages on hold, - 3 off 132/11kV 36MVA KNAF transformers, - 28 off 11/0.4kV 2.5MVA KNAN transformers, quantity to be confirmed.

Detailed engineering, manufacture, supply, construction support, quality assurance and process guarantee for a slag concentrator plant with a processing capacity of 160 tph. The plant is expected to include: - Vertical roller mill; - Cyclones: - Rougher flotation circuuit - Jameson cell - cleaner - Regrind mill (optional)

Detailed engineering, manufacture, supply, installation and commissioning support, quality assurance and process guarantee for a stacker / reclaimer package. The package is expected to include: - 1 x Tripper Conveyor supported from the roof structure - 1 x Rail monted bridge reclaimer - 1 x Reclaim conveyor - All associated instrumentation - Control System for high-level automation

Supply of Silica Sand to Olympic Dam to meet the following indicative specification: SiO2: >90% Al2O3: < 3% MgO: < 1% CaO: < 1% See attached 'scope doc' for further details.

Project management, engineering, manufacture, supply, packaging for delivery, delivery, quality assurance and commissioning support of high voltage switchrooms. Switchrooms are to be transportable types with all equipment installed/tested prior to transport. Rooms to include portal support structure with 2100mm clear access under the room and supplied with all landings/stairs. This includes but is not limited to the following switchrooms, complete with associate switchgear: - 1 off 132kV transportable switchroom - 2 off 11kV switchrooms

Detailed engineering, manufacture, supply, construction and commissioning support, quality assurance, packaging for delivery and process guarantee for an Anode Casting Machine including the following: - Anode Casting Machine (Twin-wheel) - Anode Casting Cooling Tower - All associated instrumentation - Control System See attached 'scope doc' for further details.

Design, fabrication, supply, delivery, construction, quality assurance, commissioning support and process guarantee for a Metallurgical Gas Acid Plant (AP) The acid plant is expected to include: - Acid export facility with acid road loading station, including transfer pumps and loading arm, which includes acid road loading, transfer pumps etc. - Transformers and electrical switchrooms - Associated Instrumentation and Control System Download attached 'scope doc' for further details.

Detailed engineering, manufacture, supply, commissioning support, quality assurance for the replacement of existing Anode Furnace Air-Fuel Burners with Oxy-Fuel Burners. There are two existing Anode Furnaces equipped with two burners each. The package is expected to include: - Oxy-Fuel end-wall burner - Oxy-Fuel mantle burner - Burner management system - Valve train and instrumentation for the control of LPG, oxygen, air - Hoist for mantle burner - Installation hardware and special tools - Spare parts

Project management, engineering, manufacture, supply, packaging for delivery, delivery, quality assurance and commissioning support of high voltage bulks equipment and materials. This includes but is not limited to the following equipment: - 275kV bulks * 2 off 275kV 400A GIS outdoor circuit breakers * 4 off 275kV 400A GIS outdoor disconnectors * 6 off 275kV 400A GIS outdoor earth switches * Insulators/busbars/switchyard bulks - 132kV bulks * 5 off 132kV 630A GIS outdoor circuit breakers * 12 off 132kV 630A GIS outdoor disconnectors * 5 off 132kV 630A GIS outdoor earth switches * Insulators/busbars/switchyard bulks -132kV Cables (TBC details - 500mm2, 3C, 2x 1km underground plus switchyard overhead line) - 11kV Cables (TBC size/qty) - Switchyard civils and fencing

Project management, engineering, manufacture, supply, packaging for delivery, delivery, quality assurance and commissioning support (refer equipment supply EOI note below) and process guarantee for the high voltage infrastructure required to support the Olympic Dam Smelter and Refinery Expansion (SRE) project. The major equipment listed below has been split into 4 alternate EOI that has the opportunity to be all inclusive as part of this package. This includes but is not limited to the following infrastructure from 275kV to 11kV, which is current part of equipment supply EOI as noted: - 275kV switchyard extension, - 132kV switchyard extension, - 1 off 132kV switchroom and switchgear, (part of EOI: ALP103-027) - 3 off 132/11kV 36MVA transformers, (part of EOI: ALP103-025) - 2 off 11kV switchrooms, (part of EOI: ALP103-027) - 28 off 11/0.4kV 2.5MVA transformer, (part of EOI: ALP103-025) - Supply and install High voltage bulk materials: disconnectors, circuit breakers, isolators, busbars, cabling and bulks from 275kV down to 11kV Incomers. (part of EOI: ALP103-028)

Detailed engineering, manufacture, supply, construction and commissioning support, quality assurance, packaging for delivery and process guarantee for a Wet Gas Cleaning Plant (WGCP) sized for future smelter (WGCP) for the future smelter to include the following: - Quench Tower - Radial Flow Scrubber - Droplet Separator - SO2 Stripping Tower - Gas Cooling Tower - Halide Tower - Wet ESPs - Anode Furnace Offgas Download attached 'scope doc' for further details.

Detailed engineering, manufacture, supply, installation and commissioning support, quality assurance and process guarantee for a circular stockpiling and reclaiming system in an enclosed Stacker/Reclaimer Matte Dome structure. The package is expected to include: - Enclosed Dome Matte Storage Facility - Slewing Stacker - Reclaimer - All associated instrumentation and electrical equipment - Control System for high-level automation

As part of the SRE project, Olympic Dam will have a surplus of Sulphuric Acid from mid-2029. BHP is looking for expressions of interest from suitably qualified suppliers to purchase or store Sulphuric Acid and invites responses to the following options: 1. Interest in purchasing the Sulphuric Acid from Olympic Dam site 2. Interest in purchasing the Sulphuric Acid transported to a different Delivery Point 3. Interest in storing the Sulphuric Acid at a location prior to sale by BHP 4. Any other options Download the attached 'scope doc' for further details.

Detailed engineering, manufacture, supply, construction & commissioning support, quality assurance and process guarantee for a silver refining cell system. The cell package is expected to include: - Moebius cell system; - Transformer rectifier: - Drive system for scraper trolley operation; - Busbar system; - Silver crystals recovery system; - Silver electrolyte cooling system; - pH control system. The cell package should be a modular system allowing expansion or reduction in the number of cells. Download attached 'scope doc' for further details.

Detailed engineering, manufacture, supply, delivery, construction and commissioining support, quality assurance and process guarantee for an oxygen cupel package. The oxygen cupel furnace package is expected to include: - Furnace; - Lance system: - Offgas collection and Treatment; - Hydraulic power pack; - Control system & Instrumentation.

Project management, engineering, manufacture, supply, packaging for delivery, delivery, quality assurance and commissioning support of High Voltage (HV) Static synchronous Compensator (STATCOM), or Static Var compensator (SVC), and Power Factor Correction (PFC) required to support the Olympic Dam Smelter and Refinery Expansion (SRE) project. The connection point and size of STATCOM are to be confirmed but at this stage are envisaged to be: - Metering point for control of the STATCOM (or SVC) to be at the 275kV bus. - Separate supply by others, Step down transformer (Included in a separate EOI) - Proposed step down 275kV/xxkV where xxkV is the STATCOM (or SVC) voltage is to be provided by a separate EOI. Step down transformer rated to 140MVA (To be confirmed). - STATCOM voltage to be highest commercially available system without need for further step down transformers. - Rating of overall STATCOM currently 80MVAr (To be confirmed), with the intent to be duplicated in the future. - STATCOM control and protection to be able to run autonomously without user interaction. Metering point for control of the Static PFC to be at the 132kV bus. - Rating of the proposed Static PFC is two (2) off 20MVAr (To be confirmed) capacitor banks with reactors, with the intent to be duplicated in the future. - Static PFC control and protection to be able to run autonomously without user interaction, with control equipment located in the existing control room.