2. (10pts) A large, poorly controlled copper smelter has a stack 150m high and a plume rise of 75m. It is currently emitting 1000 g/s of SO2. Estimate the ground-level concentration of SO2 from this source at distance 5 km directly downwind when the wind speed is 3m/s and the stability class is C. 3. (20pts) In the problem above, you were asked to compute the ground-level concentration under the plume centerline at a distance of 5km directly downwind of the source for C stability. (a) Now, for the same situation calculate the concentration at the plume centerline (x=5 km, y = 0 and z = H). (b) Also calculate the ground level concentration 5km downwind of the source and 500m to the side of the plume centerline (x=5 km, y = 500m and z = 0)