An underground storage tank leaks tetrachloroethylene (PCE) at a rate of 100 mL/d (about the volume of a small lemon per day). This continues for one year before the leak is discovered and stopped. The tank lies at the water table, so all of the PCE released enters the sand aquifer (but isnot necessarily immediately dissolved in the groundwater). The aquifer is 4.0 m deep and composed of sand. The actual groundwater velocity (average linear velocity) is 0.09 m/d, and the hydraulic gradient is 0.0005. The retardation factor for PCE is 6.(a) What is the hydraulic conductivity of the aquifer?(b) How far would you expect the PCE to have traveled down gradient during the one-year period?
An underground storage tank leaks tetrachloroethylene (PCE) at a rate of 100 mL/d (about the volume of a small lemon per day). This continues for one year before the leak is discovered and stopped. The tank lies at the water table, so all of the PCE released enters the sand aquifer (but is
not necessarily immediately dissolved in the groundwater). The aquifer is 4.0 m deep and composed of sand. The actual groundwater velocity (average linear velocity) is 0.09 m/d, and the hydraulic gradient is 0.0005. The retardation factor for PCE is 6.
(a) What is the hydraulic conductivity of the aquifer?
(b) How far would you expect the PCE to have traveled down gradient during the one-year period?
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