Tronox Mineral Resources & Reserves Endnotes 33 33 1 Mineral Resources are quoted inclusive of mineral resources that have been modified to ore reserves. 2 Tonnages are quoted in metric million tonnes. 3 "ROM" stands for Run of Mine, which is a mining term that means a stockpile of ore that has been created without any blending or processing, meaning that the ore has been mined and transported to the stockpile location in its original condition. ROM is quoted in millions of tonnes. 4 All extraction methods are open- cut mining operations. 5 "LoMP" stands for Life of Mine Plan, which means either the total number of years needed to extract reserves from a designed mine pit, or a design and costing study of an existing operation in which appropriate assessments have been made of realistic assumed modifying factors to demonstrate at the time of reporting that extracting is reasonably justified. 6 Proven reserves means the economically mineable material derived from a measured resource. Proven reserves are estimated with a high level of confidence, include contaminating materials and allow for losses that are expected to occur when the material is mined. 7 Probable reserves means the economically mineable material derived from a measured or indicated resource, or both. Probable reserves are estimated at a lower evel of confidence than proven reserves, include contaminating materials and allow for losses that are expected to occur when the material is mined. 8 A renewal for the Port Durnford prospecting right has been submitted. The outcome is still pending. 9 A renewal for the Centane prospecting right has been submitted. The outcome is still pending. 10 A portion of the measured resources within Namakwa Sands's mining right, but falling outside the boundary of the approved environmental management plan ("EMP"), was converted to probable reserves pending approval from the DMR to extend Namakwa Sands's EMP boundary. Exxaro Mineral Sands submitted an application to the DMR to extend the Namakwa Sands's EMP boundary, which was approved on March 28, 2012. 11 In 2011, the Namakwa Sands proven and probable reserves amount decreased by approximately 130 million tonnes from the 2010 amount due to mining of the reserves and the exclusion in 2011 of the east orange feldspathic sand ("EOFS") material from Namakwa Sands's life of mine and mineral reserves following a pre- feasibility study conducted in 2011, which concluded that building a proposed new plant to process the EOFS material was not currently economically feasible. The EOFS material, however, still remains part of Namakwa Sands's mineral resources, and Exxaro Mineral Sands is investigating alternative technologies for processing the EOFS material. 12 Block P, Port Dunford, Centane, and Cooljarloo West are exploratory programs without known reserves. |