The Project’s source control plan would produce water quality (and selenium levels) at or below the levels produced by active water treatment plants operating in the Elk Valley. These efforts would focus on keeping chemicals from leaching out of the mine rock that is moved to access the coal:

• Mine rock would be stored in-pit as much as practicable
• All other mine rock would be stored in a bottom-up layer-cake style facility designed for source control
• The dewatered tailings and plant rejects would be used as part of source control within the mine rock storage facility