core sector communique

Further Investment in the Jansen Potash Project

June 24, 2011

BHP Billiton announced today approval for US$488 million of further investment to support development of the Jansen Potash Project in Saskatchewan, Canada. This additional pre-commitment capital will fund site preparation and the procurement of long lead time items during the project’s feasibility study. The funding will also enable BHP Billiton to develop the first 350 metres of the production and service shafts should Government approvals be received.

Today’s announcement takes BHP Billiton’s investment in Jansen to $1.2 billion and the total dedicated to Saskatchewan to almost $2 billion (including acquisitions), reflecting the company’s commitment to develop a world class potash business in the province.

In February 2011, BHP Billiton announced progression of the Jansen Potash Project into the feasibility study phase. On site, the company has constructed the refrigeration centre and drilled more than 55,000 metres of wells to complete the 89 freeze holes and monitoring wells required for the production and service shafts. Based on the current schedule, Jansen is expected to start producing saleable potash from its 3,370 million tonne in-situ Mineral Resource in calendar year 2015. The project is designed to ultimately produce approximately 8 million tonnes per annum (mtpa) of agricultural grade potash with an estimated 70-year mine life.

BHP Billiton also continues to study other potential projects in the Saskatchewan potash basin and will start drilling at Melville in July 2011, having undertaken 2D and 3D seismic surveys of the project area. The Boulder and Young projects continue to progress as do other studies in the area. While the full size and potential of these development options have yet to be confirmed, BHP Billiton believes its Saskatchewan potash business could reach an annual production capacity of more than 16mtpa.

BHP Billiton Diamonds and Specialty Products President Tim Cutt said: “We continue to make good progress at Jansen and at our other potash projects in Saskatchewan. At Jansen we remain focused on the ground freezing process ahead of sinking the production and service shafts, and we continue to work with the provincial Government to secure the necessary environmental approvals. We look forward to increasing our presence in Saskatchewan as we relocate our Canadian headquarters to Saskatoon, our project pipeline matures and as we develop a significant and scalable potash business.”

Mineral Resources:

This release includes information on Mineral Resources, which is based on information prepared by the relevant Competent Persons as named in the June 2010 Annual Report, and reported under the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’(JORC Code). The Competent Persons verify that this release is based on and fairly reflects the information in the supporting documentation and agree with the form and context of the Mineral Resources presented. The Competent Persons are full time employees of BHP Billiton unless otherwise noted and have the required qualifications and experience to estimate and report Mineral Resources under the JORC Code.