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A wastewater flow of 25 million gallons per day (MGD) with a conservative pollutant concentration of 25mg/L, is released into a stream having an upstream

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A wastewater flow of 25 million gallons per day (MGD) with a conservative pollutant concentration of 25mg/L, is released into a stream having an upstream flow of 75cfs (ft3/sec) and pollutant concentration of 3.5mg/L. (a) What is the concentration of the pollutant in mg/L just downstream? (b) How many pounds of substance per day pass a spot 10 mile downstream? Note: 1 kg=2.2lb&1 gallon =3.785L )

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