Along an elevated section of highway, the traffic density is 1.500 vehicles per hour with an average speed of 50 miles per hour. The wind speed is 4 ft/sec, it is daytime with moderately sunny conditions. The average hydrocarbon emission rate for each vehicle is 0.28 g/sec. There is a small township in the valley 200 feet below the highway at a distance of 1 km away, where the vertical dispersion coefficient (sigma)z is approximately 200 m. 

Calculate the downwind hydrocarbon concentration in ug/m3.

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To calculate the downwind hydrocarbon concentration in micrograms per cubic meter gm we can use the ... View the full answer