WESTERN YILGARN NL — M&A Activity 2012

Aug 6, 2012

IRON MOUNTAIN MINING LIMITED

(ACN 112 914 459) Level 7, 231 Adelaide Terrace PERTH WA 6000

7 August 2012

United Orogen Limited Level 7, 231 Adelaide Terrace PERTH WA 6000

Dear Sir

NOTICE PURSUANT TO SECTION 633(2) OF THE CORPORATIONS ACT Re 2001 - DATE FOR DETERMINING HOLDERS OF SECURITIES

We refer to the bidder's statement dated 27 July 2012 and your letter of 6 August 2012 authorising the early despatch of the bidder's statement to security holders.

Pursuant to section 633(2) of the Corporations Act we have determined 7 August 2012 as the date for determining holders of United Orogen securities.

We will send bidder's statement and offers to each person (other than the bidder) who holds:

• securities in the bid class: or
• securities that come to be in the bid class due to the conversion of or exercise of rights attached to other securities;

as at this date

Yours faithfully

$10_r$

David Zohar Director