A pilot vapor extraction test is to be conducted for a site contaminated with gasoline. The extraction well size (Rw) is 2 inches in diameter and the monitoring well distances (Ri) are 5 and 20 m. The length of the screened interval of the vent is 5 m. The following conditions are given: porosity (n) = 0.4; µ = 1.8 × 10⁻⁴ g/cm·sec; dm = 0.01 mm; Patm = 1.013 x 10⁶ g/cm·sec² = 1 atm; stratum thickness (m) = 8 m. Draw graphs and discuss briefly (2 ~ 3 sentences for each graph). Plot the distance from the well vs. time for vapor flow to reach steady-state at dm = 0.01 and 0.1 mm (i.e., at two intrinsic permeability values). Estimate k using the Kozeny-Carmen equation.
