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Sulfur dioxide is emitted at a rate of 2 kg/s from the top of a chimney that is 120m high. The plume initially rises vertically a further 10m above the chimney exit, before being convected horizontally by a wind speed of 15m/s under conditions of neutral stability. The daytime isolation is moderate. Calculate
a) The concentration on the plume centre-line at a distance of 800m downwind of the chimney
b) The ground level concentration at a distance of 800m downwind of the chimney
c)The concentration at 1542m location