An underground storage tank was used to store toluene. Over a period of time some of
the toluene leaked from the tank, contaminating the soil and groundwater below the tank.
A subsurface investigation reveals that approximately 100 pounds of toluene remains in
the vadose zone (above the water table). It is proposed to clean the soil by soil vapor
extraction, in which air is drawn through the soil to vaporize the contaminant. Assuming
the toluene behaves as a pure substance, estimate the minimum volume of air which
would be needed to remove all of the toluen
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