Problem 6. Five million gallons per day (MGD) of wastewater, with a concentration of 10.0 mg/L of a conservative pollutant, is released into a stream having an upstream flow of

10 MGD and a pollutant concentration of 3.0 mg/L. What is the concentration in mg/L just downstream? How many pounds of substance per day pass a given spot downstream? (You may want the conversions of 3.785 L/gal and 2.2 Ib/kg)