Large quantities of nitrate ( a mobile aninon) and an indistrial solvent with a distribution coefficient of Kd=0.5 cm3/g were spilled on the soil surface. Meteorological data shows that annual rainfall and evaporation are 1000mm and 550mm, respectively. There is a water table at 60m below ground surface. Assume that the soil has an average water content of 2.5 kg/kg and a bulk density of 1500 kg/m3. Estimate the approximate position of both peaks 30 years after they were spilled. Estimate the expected future arrival time of both peaks at the water table.