Air stripping process is used as a pump and treat method for…

Air stripping process is used as a pump and treat method for removing a trichloroethylene (TCE) from groundwater.  The following conditions apply: Influent flow rate = 40 m3/sec QA/QW = 20 Dimensionless Henry’s constant = 0.2 TCE concentration in the influent = 1.1 mg/L TCE concentration in the effluent = 50 µg/L Amount of pollutant (TCE) in the influent entering the air stripping tower is (Kg/sec):

Hydraulic conductivity of soil is measured as 2×10-2  cm/sec…

Hydraulic conductivity of soil is measured as 2×10-2  cm/sec.  After an accident, a truck carrying dissolved salt solution releases its contents to surface.  The distance between the spill and a groundwater well is 1600 meter.  The groundwater elevation at the spill location is 5.5 meter and well location is 5.3 meters. Porosity of soil is 0.4.  For the scenario described, Darcy velocity is most nearly (m/day) (Hint:  First convert hydraulic conductivity from cm/sec to m/day units):