An industrial site emitting H2S which has a pungent smell like rutton eggs, at a rate of 10g/min at ground level. Suppose that between 9:00-10:00 hours in the morning there is a wind from the north at about 4 m/s. A slight sensible heat flux has been measured. There is a temperature inversion at 700 m and the surface roughness of the area is 40 cm. What would the average conc in air be during this hour at the boundary fence 200 metres to the south? Would the odor be detectable? What difference would it make if the release was from a 30 m stack, assuming negligible heat and momentum for the release? Note that the smell of H2S is detectable at about 7 g/m3.