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Cripple Creek & Victor Phone (719) 689-2977 <br />Gold Mining Company Fax (719) 689-3254 <br />PO Box 191 <br />100 N 3`a <br />ANGLOGOLD A sHANTI Victor, CO 80860-0191 <br />ANGLOGOLD ASHANTI (COLORADO) CORP. <br />4. VLF Operational Balances <br />Maintaining the VLF operational water balance within prescribed limits will be a chief guideline for operations <br />during the HJ project. The nominal total barren flow from the plant will not be increased during the HJ project <br />and flow will continue to be distributed to the three phase drainages in the VLF under the condition that the <br />flow to any one phase must not exceed the pumping capacity of that phase. Additionally, as the time for <br />solutions introduced into the VLF during the HJ injections will be more rapid than solutions introduced on the <br />surface, extra consideration will be given to ensuring that the flow reporting to the Phase 2 PSSA will not exceed <br />safe levels. Ensuring that these guidelines can be easily followed will be aided by the relatively low flow rates <br />expected to be allotted to leaching networks on Phase 2 and the low level in the PSSA predicted ahead of the HJ <br />project. <br />References <br />Rucker, D. F., M. McNeill, et al. (2009). "Monitoring of a secondary recovery application of leachate injection into <br />a heap." Hydrometallurgy 99(3-4): 238-248. <br />Rucker, D. F., A. Schindler, et al. (2009). "Three-dimensional electrical resistivity imaging of a gold heap." <br />Hydrometallurev 98: 267-275. <br />Seal, T. (2007). Hydro-Jex: Heap leach pad stimulation technology: Ready for worldwide industrial adoption? <br />Society of Mining, Metallurgy and Exploration Inc. Annual Meeting & Exhibit, Denver, Colorado. <br />Seal, T. and J. B. Fink (2008). Integrating hydro-fracturing technology and geophysics into 3D mapping and <br />extraction of metals in heap leaching: Hydro-Jex and high resolution resistivity. Society of Mining, Metallurgy <br />and Exploration Inc. Annual Meeting & Exhibit, Salt Lake City, Utah.