Passive containment includes barriers and hydraulic containment
(i.e. pump and treat).
Containment describes a range of approaches which are used
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to prevent the migration of contamination. As such all containment
approaches are examples of pathway management. Passive
containment is achieved by introducing impermeable barriers
that prevent the flow of water (and/or gases). Hydraulic
containment (pump and treat) relies on pumping the contaminated
groundwater to the surface using a series of extraction
wells, treating it at the surface to remove the contaminants,
and then either reinjecting the water underground or disposing
of it off site.