4. An industrial plant releases a constant stream of a very bad substance at a rate of 3.0 kg/hr. The effective plume height is 40m. The wind speed is 1.5m/s. a. Estimate the location of and maximum ground level concentration of the VBS b. Estimate the location of and maximum ground level concentration of the VBS if the effective stack height is raised to 60m. c. Add a second source, of equal strength and effective stack height (both assumed to be 40m again), 200m crosswind from the original source. What will be the resulting concentration of pollutants 0.5km downwind of the 1st source? What will be the resulting concentration of pollutants 0.5km downwind of the 1st source, halfway (crosswind) between the two sources? You may assume that the VBS reflects perfectly off the surface, that there is no inversion layer, that the VBS is non-reactive, and that the stability class is " C ". 5. A 0.6m diameter 25m high stack releases gases at 450K at a rate of 10g/s into a steady 1.5m/s wind. The exit velocity for the stack is 1.5m/s and the stack diameter is 0.6m. Assume an inversion height of 1.5km. Estimate the maximum ground level concentration assuming rural stability class B. Repeat assuming rural stability classes C and D. How significant of an effect does the stability class have on the maximum ground level concentrations? Where does the maximum concentration occur for each of the three stability classes? Briefly comment on your results