Safety in Design “The Mining Perspective”

2. Safety in Design “The Mining Perspective” Dr Jonathan Gilligan Deputy Director – Mine Development BHP Billiton Olympic Dam Expansion Project

3. DISCLAIMER By reviewing/attending this presentation you agree to be bound by the following conditions. Neither BHP Billiton nor any of its directors, officers, employees or advisers nor any other person makes any representation or warranty, express or implied, as to, and accordingly no reliance should be placed on, the fairness, accuracy or completeness of the information contained in the presentation or of the views given or implied. To the extent permitted by law, neither BHP Billiton nor any of its directors, officers, employees or advisers nor any other person shall have any liability whatsoever for any errors or omissions or any loss howsoever arising, directly or indirectly, from any use of this information or its contents or otherwise arising in connection therewith. This presentation is for information purposes only and does not constitute or form part of any offer for sale of any securities or an offer or invitation to purchase any such securities This presentation is directed only at persons who (i) are persons falling within Article 49(2)(a) to (d) (“high net worth companies, unincorporated associations etc.”) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005 (as amended) (the “Order”) or (ii) have professional experience in matters relating to investments falling within Article 19(5) of the Order or (iii) are outside the United Kingdom (all such persons being referred to as “relevant persons”). This presentation must not be acted on or relied on by persons who are not relevant persons. Certain statements in this presentation are forward-looking statements (including statements regarding contribution synergies, future cost savings, the cost and timing of development projects, future production volumes, increases in production and infrastructure capacity, the identification of additional mineral Reserves and Resources and project lives and, without limitation, other statements typically containing words such as “intends,” “expects,” “anticipates,” “targets,” plans,” “estimates” and words of similar import). These statements are based on current expectations and beliefs and numerous assumptions regarding BHP Billiton's present and future business strategies and the environments in which BHP Billiton will operate in the future and such assumptions, expectations and beliefs may or may not prove to be correct and by their nature, are subject to a number of known and unknown risks and uncertainties that could cause actual results, performance and achievements to differ materially. Factors that could cause actual results or performance to differ materially from those expressed or implied in the forward-looking statements include, but are not limited to, the risk factors discussed in BHP Billiton's filings with the U.S. Securities and Exchange Commission (“SEC”) (including in Annual Reports on Form 20-F) which are available at the SEC's website (http://www.sec.gov). Save as required by law or the rules of the UK Listing Authority and the London Stock Exchange, the UK Takeover Panel, or the listing rules of ASX Limited, BHP Billiton undertakes no duty to update any forward-looking statements in this presentation.

4. DISCLAIMER (Cont) Cautionary Note to US Investors – The SEC generally permits mining companies in their filings with the SEC to disclose only those mineral deposits that the company can economically and legally extract. Certain terms in this presentation, including “resource”, “measured resource”, “indicated resource”, “inferred resource” and “deposit”, would not generally be permitted in an SEC filing. The material denoted by such terms is not proven or probable Reserves as such terms are used in the SEC's Industry Guide 7, and there can be no assurance that BHP Billiton will be able to convert such material to proven or probable Reserves or extract such material economically. BHP Billiton urges investors to refer to its Annual Report on Form 20-F for the fiscal year ended June 30, 2007, for its most recent statement of mineral Reserves calculated in accordance with Industry Guide 7. Competent Persons for Mineral Resources and Ore Reserves are named in the BHP Billiton Annual Report 2007, which can be viewed at www.bhpbilliton.com. Stuart Hayward, who is a member of AIG and a full time employee of BHP Billiton, and Shane O'Connell, who is a member of the AusIMM and a full time employee of BHP Billiton,  have the required qualifications and experience, are joint Competent Persons for the assessment of Mineral Resources at Olympic Dam, which has been reported in accordance with the Australasian Code for Reporting of Mineral Resources and Ore Reserves, December 2004 (the JORC Code).  Stuart Hayward and Shane O'Connell verify that the 2007 Mineral Resource data included in this document is based on and fairly reflects the information in the supporting documentation relating to Olympic Dam Mineral Resource.The Mineral Resource numbers prior to 2007 have been sourced from the publicly available Annual Reports for WMC and BHPBilliton.

5. Olympic Dam Location ~550km

6. OLYMPIC DAM EXPANSION • Australia’s largest underground to an open pit mine • New ore processing plant • New 90km rail line, Olympic Dam to Pimba • New electricity transmission lines ~ 270km • New airport with 737 jet and night flying capacity • New construction camp up to 8000 person capacity • New accommodation and services ~ a doubling of Roxby Downs • New seawater desalination plant and ~ 320km pipeline

7. Mining Fatalities • A diesel mechanic was fatally injured when he was crushed between the blade of an operating dozer and a service truck that he was standing beside in February 2007. • A Truck Driver sustained fatal injuries as a result of a collision between two Caterpillar 797B Haul Trucks in June 2007.

8. Mining Significant Incidents • An operator of a 793B haul truck fell from the platform of the cabin to the ground sustaining serious head and back injuries in January 2007. • A D10T operator fell from the dozer while attempting to enter the cabin. As he attempted to open the door by pulling it towards him his hands slipped causing him to fall backwards approximately 2.5m on to the ground in September 2006.

9. Disturbing Facts – Failing to Establish Safety in Design? • Taxonomy of fatalities and non-fatal permanent disabling incidents* • 44 Fatalities (1992 – 2006 Western Australia) • 449 Non-Fatal Permanent Disabilities (1987 – 2006 Western Australia) • *Source: The Intersafe Group

10. Fatal and Non-Fatal Permanent Injuries – Energy Source What is the most prevalent cause (damaging energy source) of Fatalities and Non-Fatal Permanent Injuries in the mining industry? • Vehicular Energy • Surface Mining, 23 Fatalities (1992 – 2006 WA Mining*) • 9 – Heavy vehicle environment • 5 – Heavy vehicle struck person • 4 – Heavy vehicle to another vehicle • 3 – Vehicle component lowered / fell onto person • 1 – Light vehicle to environment • 1 – Light vehicle struck person

11. Fatal and Non-Fatal Permanent Injuries – Energy Source • Gravitational Events • 7 Fatalities • 5 - Free falling objects • 4 – Other than rock • 1 – Fall of rock • 2 people falling from height

12. Significant incidents by all FRCP’s FY 07

13. HSEC Design Principles • No ODX contractor or employee will make decisions based solely on economic grounds. • Project Teams are empowered to create initiatives to continuously improve HSEC performance. • Designs will meet regulatory requirements and BHP Billiton Standards. • The principles of ALARP apply in all designs. • The Hierarchy of Control applies in all designs

14. HSE IN DESIGN ACROSS THE PROJECT • HSE is inculcated into all facets of engineering design. • HSE in Design activities and supporting documents have been developed for use throughout the project lifecycle. • HSE in Design is not exclusively about conformance with risk assessment processes (e.g. HAZOP). These processes are certainly necessary and important; however, they serve only to ensure that HSE issues have been addressed earlier in the design process.

15. HSE IN DESIGN ACROSS THE PROJECT • The Project Team's approach to HSE in Design is consistent with the "National OHS Strategy 2002 – 2012" • One of five National Priorities set by the ASCC (formerly NOSHC) is "Eliminate hazards at the design stage". • ODX activities relating to HSE in Design aim to influence the behaviours and actions of all persons involved with engineering design so they are committed to the; • Elimination of hazards • Application of Leading Practice • Application of FRCP requirements • Application of design related key learning's from Significant Incidents

16. HSE DESIGN CRITERIA • The ODX HSE Design Criteria establishes a set of philosophies and criteria which apply to all design decisions on the ODX Project. • The document provides guidance to designers on the fundamental principles of HSE in Design (based on the concept of Damaging Energy) and how to manage damaging energy types through design. • Information is supplemented by photos of 'Leading Practice' as well as poor examples and design features to avoid.

17. HSE Design Criteria • Work teams are empowered to review significant incidents and hazards and develop solutions for eliminating these from the work place. • Significant Incident Elimination Posters are developed.

18. Hierarchy of Control

19. Good Safety in Design Examples • Safe access for regular haul truck maintenance and inspection.

20. Good Safety in Design Examples Safe access for regular maintenance and inspection using mobile access systems significantly reduces the risk of an injury to due to a fall.

21. HSE Design Eliminating Fatalities Truck Shovel & Drill Automation • Implementation of Autonomous Truck Haulage, Blasthole Drills and Remote Control Shovels. • Separation of automated and non-automated components in a predictable cycle. • Haul truck automation in project collaboration with Caterpillar underway

22. HSE Design Eliminating Fatalities Fatigue Detection Systems • Investigate fatigue monitoring technology such as Optalert to complement fatigue management programs eg • Work - life balance • Fatigue Management Plans. • Integrate Optalert with equipment and FMS. • Optalert is a new device that continuously measures alertness/drowsiness. Caution, you are showing sins of drowsiness Danger, you are now too drowsy to drive

23. HSE Design Eliminating Fatalities Drill Rig Carousel • Serious manual handling & crush Injuries occur when drill bits need changing on drill strings. • Development of a drill bit carousel for automated change out of drill bits without manual handling Seatbelt Immobiliser • Fatalities and injuries can occur if the driver is not wearing a seat belt in a rollover. • Lock out on equipment that does not allow equipment operation to commence if seat belt is not being used as required.

24. ODX TRIFR June 2006 – July 2008

25. Safety in Design Initiatives Over-Wind Protection System for Drill Rig Winch Cable Working at Heights Fall Protection

26. Safety in Design Initiatives • Mosslake Drilling 300D Drill Rig • Automatic Rod Handler which takes away the need to manually handle rods. • Eliminates hand and manual handling injuries

27. Summary • Our goal is Zero Harm to our employees and contractors. • We will endeavour to eliminate hazards from our workplace by designing safe plant and equipment. • Mature organisations have a positive reporting culture of incidents and near misses that are critical for developing solutions for eliminating hazards from the work place • No decisions will be based solely on economic grounds. • The Hierarchy of Control will always apply.