6. A manufacturing plant located in a narrow canyon has applied to the Environmental Protection Agency (EPA) for a permit to continuously release 15ft3/min of exhaust gas, containing 0.06gmol/ft3 of a pollutant, into the air. The wind travels through the canyon at an average flow rate of 800ft3/min (not including the exhaust gas). Furthermore, the pollutant also reacts with the air and sunlight to be converted to a harmless product (the volume of air consumed in this reaction is negligible) so that 20% of the pollutant released is converted by the time it leaves the canyon. A : What wind flow rate entering the canyon would produce a pollutant concentration greater than 0.0025gmol/ft3 in the air coming out of the canyon? Hint 1: The canyon has two input streams, the entering wind (containing no pollutant) and the exhaust gas from the manufacturing plant. Two outlet streams are the exiting (mixed) wind and the conversion of pollutant to a harmless product. Hint 2: The densities of the exhaust gas and the wind can be assumed to be equal