1. Consider a lake with the following characteristics: - Surface Area =11106m2 - Mean depth =5m - Residence Time =4.6yr - TSS=2mg/L (mass of suspended particulates per volume of water) - foc=0.4% An industrial plant presently discharges malathion (a pesticide) to the lake at a loading rate (W) of 2000106g/yr. In addition, the inflowing stream also contains malathion at 15mg/L. Your firm measures degradation of the pesticide in the lake water at a first-order rate of 0.1yr1. Log koc for malathion =2.61 Compute the steady-state in-lake pesticide concentration (mg/L), assuming the lake is well mixed. (Note, you will upload a file as the last question to show your work for this question and other questions in this homework). If the lake is at steady state, what industrial plant loading rate must be maintained to lower the lake's concentration to 30ppm ? (assume nothing can be done about the stream inflow concentrations). Express your answer as a percent reduction from the original loading