Problem: A dry well receives 50,000 liter of aqueous waste containing 125 mg/L MIBK. The sorption of MIBK in the soil follows a Langmuir isotherm, with a = 0.14 and b= 0.088. The dry well is 1.5 meters in diameter, and the soil has a bulk density of 2,100 kg/m3. If the equilibrium concentration of MIBK in the soil is 0.1 mg/L, how deep in the soil will the MIBK be sorbed?