A stack emits a plume over a rural area at 300 g/s ona clear summer day at noon with a "surface windspeed" of 1.8 m/s. The stack has a physical

height, h,of 75 m, an inner diameter of 2.5 m, a stack gasvelocity of 28 m/s, and a heat emission rate, QH, of32,000 kJ/s. (a) Use the Concawe formula to calculate the plumerise. Round to the nearest whole number. (b) Calculate the steady-state concentration at thefollowing point: 18 meters above ground-level, 1,100m downwind from the stack, and 150 m off thecenterline (ug/m3). Report your result with two values past the decimal point. (c) Calculate the maximum downwind ground-level concentration (ug/m3). Round to the nearest whole