Atlantic Richfield/BP is considering a roughly 12-acre site, currently on Montana Resources mine property, for Superfund wastes not suitable for dumping in the Berkeley Pit, another proposed ...

One key reason, according to Atlantic Richfield/BP, is the array of wastes that will likely be encountered in those areas. And if the contaminated Berkeley Pit gets a green light from EPA and the ...

The Berkeley Pit, however, has a much richer concentration of rare earths in solution and a higher volume of water and is expected to produce 40 tons a year. Dr. Ziemkiewicz believes this process ...

The Berkeley Pit’s property and mineral rights are owned by Montana Resources. It and Atlantic Richfield/BP share in the site’s environmental liability.