Afield test is conducted in an unconfined aquifer by pumping 1,300 ft3 /hr from an 8-inch-diameter well penetrating the aquifer. the undisturbed aquifer thickness is 46 ft. the drawdowns, measured at steady state at various locations, are tabulated below along with the associated semi-log plot of h2 vs. log r. determine the coefficient of permeability and how far away from the well you must be before the drawdown becomes less than 2.5 ft. r (ft) 0.33 40 125 350 s (ft) 6.05 4.05 3.57 3.05