By Nick Cato, Shahid Mahmud
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Additional resources for Abandoned Mine Site Characterization and Cleanup Handbook
Determining which sites are the significant sources of metal-leachates and understanding the range of 4-2 Chapter 4: Setting Goals and Measuring Success impacts, as well as judging the relative priority, need and basis for response activity, will be an important aspect of goal-setting for abandoned mine site work at state and local levels. S. S. S. Army Corps of Engineers have significant responsibilities in coordinating and implementing the activities necessary to accomplish environmental response to the abandoned mine site problem across the country.
Rarely in the case of abandoned mines should acute cyanide toxicity be of concern. , spills) of Cyanide Solution. , contamination of drinking water) impacts. Again, because cyanide solution is not typically present at abandoned mine sites in quantities large enough to release as a spill, this type of impact is unlikely at abandoned mine sites. Cyanide Leachate from Process or Waste units. , heaps and dumps of spent ore, tailings impoundments) may be released and present hazards to surface water or ground water.
Dissolution of metals due to low pH is a well known characteristic of each acid drainage. Low pH is not necessary for metals to be mobilized and to contaminate waters; there is increasing concern about neutral and high pH mobilization. 3-4 Chapter 3: Environmental Impacts from Mining Sources. Primary sources of dissolved pollutants from metal mining operations include underground and surface mine workings, overburden and waste rock piles, tailings piles and impoundments, direct discharges from Highlight 3-3 conventional milling/beneficiation operations, California Gulch leach piles and processing facilities, chemical The California Gulch Superfund site, located in the storage areas (runoff and spills), and upper Arkansa s River Valley in L ake County, reclamation activities.