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TRUE
FALSE
The hydraulic conductivity/permeability of the aquifer
The biodegradability of the contaminants
The location of contamination
All of the above.
Both the biodegradability of the contaminants & the location of contamination. The permeability of the soil is not important.
A sandy strata.
A gravel strata.
A clay.
A silt.
They would be the same, pore size is not important.
In the vadose zone.
It would sit on the water table.
It would be found a small depth beneath the water table
It would lie in low spots at the base of the aquifer.
It would be so viscous, it would not permeate into the ground.
In the vadose zone well above the WT.
It would sit on the water table, some above and some below.
It would be found some depth beneath the water table
Gravity
Groundwater Flow
To cover it (cap).
Air sparging
To inject hot air and surfactants into the vadose zone.
To inject hot air and surfactants to deep into the saturated zone.
No need to excavate & transport soils
Can treat a large volume of soil at once.
Causes less contaminants to be released
Can remediate contaminants adsorbed/trapped within soil.
Can be used to treat contaminants at all depths below the ground surface.