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Additional info for Abandoned Mine Site Characterization and Cleanup Handbook
It is important that EPA demonstrate its willingness to share control with local groups and be responsive to recommendations from these groups. This is the heart of community-based environmental decision-making. At many sites, staff meet regularly with stakeholder groups Chapter 5: Co mmu nity Involveme nt 5-3 that include representatives from the community, PRPs, state, EPA and other stakeholders to discuss site plans and reach informal consensus on them. Conduct a Demonstration Project. The team should consider a demonstration project in cases where the EPA is proposing soil remediation in residential areas.
AMD). Acid generation can occur rapidly, or it may take years or decades to appear and reach its full potential. For that reason, even a long-abandoned site can intensify in regard to its environmental impacts. The severity of, and impacts from, AMD/ARD are primarily a function of the mineralogy of the rock material and the availability of water and oxygen. While acid may be neutralized by the receiving water, some dissolved metals may remain in solution. Dissolved metals in acid drainage may include lead, copper, silver, manganese, cadmium, iron, and zinc, among other metals.
Examples of metals occurring in the dissolved form include aluminum, manganese, copper, lead, zinc, and others. Physical Factors. Physical factors include the physical characteristics of the waste or structure, the way in which acid-generating and acid-neutralizing materials are placed, and the local hydrology. The physical nature of the material, such as particle size, permeability, and physical weathering characteristics, is important to the acid generation potential. Though difficult to weigh, each of these factors influences the potential for acid generation and is, therefore, an important consideration for long term waste management.