A small organic farm has a newly installed irrigation well. At a nearby metal shop and junkyard an employee was discovered disposing of trichloroethane (TCE) into the septic tank which is 120 m directly upgradient from the well. The underlying aquifer is 8 m thick, has a hydraulic gradient of 0.003, a hydraulic conductivity of 6 m/d and is composed of clean sand with a density of 2.5 g/cm3, a porosity of 0.35 and foc = 0.01. How long do you estimate that it could take the TCE to reach the well? TCE Koc = 160