the silent plant, a granulation process water at the lead smelter, an anode washing system at the zinc refinery, management, and disposal of lead and copper slag wastes, domestic wastewater treatment, and domestic waste disposal. However, Doe Run Peru has been indemnified by Centromin (and guaranteed by the Peruvian Government) against any environmental liability arising out of Centromin's prior operations. Doe Run's original commitment to this program was US$107 million but it is now expected that it will cost at least US$244 million. The company caused trouble in 2004, particularly among non-governmental organizations, when it said that it would not be able to complete the PAMA by the deadline of 2006, and asked for an extension. On Dec 29, 2004, the Peruvian Government issued Supreme Decree No. 046-2004-EM, which recognized that exceptional circumstances may justify an extension of the time to complete one or more projects within the scope of a PAMA. Doe Run Peru was granted such an extension by the Ministry of Energy and Mines on May 29, 2006. The exact reason for the request was not given but appears to have been a combination of cash flow availability, additional PAMA requirements, and additional upgrading. This includes the replacement of the reverberatory furnace with a submerged lanced reactor furnace for US$57 million which will reduce gas volume and provide a much richer sulfur dioxide off-gas that is far more suitable for sulfuric acid production. Conditions of the extension include the payment into a trust account each month of revenue sufficient to cover the next month's estimated expenditure on the PAMA. Also, the company has been forbidden to make any payment to any shareholder or affiliate that might affect the completion of the PAMA. Renco has confirmed that it understands that Doe Run Peru would lose the benefit of the PAMA extension if any such payment is made. The PAMA has since been modified to include the reduction of the stack and fugitive emissions to meet air quality objectives, certain additional pollution controls, and the protection of public health including the reduction of lead levels in the blood and special health programs for children and expectant mothers. On February 5, 2008, Doe Run Peru reported that state health officials and OSINERGMIN, an independent Peruvian regulatory agency had confirmed that the quality of the Yauli or Mantaro Rivers was no longer impacted by the smelter's liquid discharges. However, the company