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Cripple Creek&Victor Phone(719)689-2977 <br /> , t Gold Mining Company Fax(719)689-3254 <br /> PO Box 191 <br /> 100N3m <br /> ANGLOGOLD ASHANTI Victor,CO80860-0191 <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 /> Hydrometallurg 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 mappinp,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. <br />