During a regular cleaning cycle for a cylindrical water storage tank (diameter = 60 feet; depth = 25 feet), a technician accidently overdoses the tank with chlorine. The resulting chlorine concentration in the tank is 25 mg/L and the EPA limit for chlorine in drinking water is 4.0 mg/L. The operator decides to flush the tank with water from the distribution system which has a chlorine concentration of 1.5 mg/L and waste the water until the chlorine level reaches the EPA limit. You may assume that for the timeframes considered that chlorine is conservative (i. e., non-reactive) and the tank is completely mixed. a.If the tank is flushed at a rate of 4,000 gpm, how long (in hours) will it take to achieve the 4.0 mg/L concentration?b. The operator is impatient and wants to get this done in 30 minutes. What flushing flowrate (in gpm) would be required to achieve the 4.0 mg/L concentration?c. Calculate the volume (in gallons) of water used (i. e., wasted) for Part A and Part B. Is there another solution to this problem that you can suggest?