# 2. Is it justifiable to use a constant value for the effective plume rise for a given situation, or should…

2. Is it justifiable to use a constant value for the effective plume rise for a given situation, or should one in reality, adjust for the distance downwind from the stack? Discuss.

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3. Sulfur dioxide is being emitted in a rural area at a rate of 0.90 kg/s from a stack with an effective stack height of 220m. The average wind speed at stack height is 4.8 m/s and the stability category is B. Determine the short-time period, downwind, center-line concentration in micrograms per cubic meter at ground-level distances of 1.0, 2.0 and 4.0 km.

4. What is the expected short-term period ground-level concentration at 150 and 250 m away from the downwind center line for the conditions given in Problem 3?